WO1997006106A1 - Water decontamination using a photolysis ionizer - Google Patents
Water decontamination using a photolysis ionizer Download PDFInfo
- Publication number
- WO1997006106A1 WO1997006106A1 PCT/US1995/009949 US9509949W WO9706106A1 WO 1997006106 A1 WO1997006106 A1 WO 1997006106A1 US 9509949 W US9509949 W US 9509949W WO 9706106 A1 WO9706106 A1 WO 9706106A1
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- WIPO (PCT)
- Prior art keywords
- water
- chamber
- reagent
- accordance
- ultraviolet radiation
- Prior art date
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 102
- 229910001868 water Inorganic materials 0.000 title claims abstract description 102
- 238000006303 photolysis reaction Methods 0.000 title abstract description 22
- 230000015843 photosynthesis, light reaction Effects 0.000 title abstract description 22
- 238000005202 decontamination Methods 0.000 title description 2
- 230000003588 decontaminative effect Effects 0.000 title description 2
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 53
- 230000001590 oxidative effect Effects 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000012530 fluid Substances 0.000 claims abstract description 15
- 239000000356 contaminant Substances 0.000 claims abstract description 13
- 230000005855 radiation Effects 0.000 claims description 43
- 239000010453 quartz Substances 0.000 claims description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 23
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 239000004020 conductor Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 2
- 230000002708 enhancing effect Effects 0.000 claims description 2
- 229910052594 sapphire Inorganic materials 0.000 claims description 2
- 239000010980 sapphire Substances 0.000 claims description 2
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims 2
- 239000011248 coating agent Substances 0.000 claims 1
- 230000001678 irradiating effect Effects 0.000 claims 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract description 9
- 150000002894 organic compounds Chemical class 0.000 abstract description 5
- 239000007800 oxidant agent Substances 0.000 abstract description 3
- 238000000605 extraction Methods 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 18
- 239000000835 fiber Substances 0.000 description 8
- 238000007254 oxidation reaction Methods 0.000 description 7
- 230000003647 oxidation Effects 0.000 description 6
- 150000002978 peroxides Chemical class 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 238000005805 hydroxylation reaction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 206010034972 Photosensitivity reaction Diseases 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000033444 hydroxylation Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 206010070834 Sensitisation Diseases 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000002144 chemical decomposition reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VSQYNPJPULBZKU-UHFFFAOYSA-N mercury xenon Chemical compound [Xe].[Hg] VSQYNPJPULBZKU-UHFFFAOYSA-N 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000003389 potentiating effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000008313 sensitization Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
- A61L2/08—Radiation
- A61L2/10—Ultra-violet radiation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
- A61L2/08—Radiation
- A61L2/12—Microwaves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
- A61L2/18—Liquid substances or solutions comprising solids or dissolved gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J19/12—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electromagnetic waves
- B01J19/122—Incoherent waves
- B01J19/123—Ultra-violet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/302—Treatment of water, waste water, or sewage by irradiation with microwaves
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
- C02F1/325—Irradiation devices or lamp constructions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/32—Details relating to UV-irradiation devices
- C02F2201/322—Lamp arrangement
- C02F2201/3228—Units having reflectors, e.g. coatings, baffles, plates, mirrors
Definitions
- This invention relates to a water treatment method and an apparatus, and more particularly, to a method and apparatus for the removal from aqueous fluid of toxic and potentially hazardous organic compounds.
- the present method and apparatus exploit, synergistically, ultraviolet photolysis, the use of hydroxyl radicals, and microwave energy to, optimize the oxidation of organic contaminants in water.
- UV light and reagents such as hydrogen peroxide to create hydroxyl radicals
- UV light and reagents such as hydrogen peroxide to create hydroxyl radicals
- first generation systems of this sort it was proposed that low pressure UV discharge lamps be encased in quartz tubes immersed in tanks of water to be treated. Hydrogen peroxide was added to the water, and the mixture was allowed to flow around the submerged lamps. Problems with rapid fouling of the lamps and low production of hydroxyl radicals in such devices soon became apparent.
- Second generation apparatus of the above type incorporated manual cleaning mechanisms, and the use of polymer coatings (such as "Teflon” PTFE) on the quartz sleeve, additional oxidizers (such as ozone) , and catalyzing additives (such as Ti ⁇ 2 ) to enhance the rate of radical production.
- Polymer coatings such as "Teflon” PTFE
- additional oxidizers such as ozone
- catalyzing additives such as Ti ⁇ 2
- the oxidizing reagent is added to the water prior to exposure of the mixture to the UV radiation. Since chemical oxidation is rapid, in such arrangements inorganic precipitates quickly form on the quartz sleeve or window surfaces, resulting in immediate and cumulative attenuation of the UV radiation.
- the present invention provides a method and apparatus which addresses and obviates the above shortcomings of the prior art, by synergistically enhancing contaminant destruction by complementary techniques.
- the present invention provides, for use in the treatment of waste water, an ionizing reactor for photochemically oxidizing organic compounds in aqueous solutions, using microwave-assisted photolysis and hydroxyl radical oxidation.
- the photolysis, production of hydroxyl radicals and the final hydroxylation reaction are all effected using a high pressure UV short arc lamp.
- Peroxide activation is made to take place in such a manner that a pure reagent is continuously irradiated, thus maximizing O 3 and H ⁇ 2 + and OH + radical production.
- the reagent, thus activated, is injected into a downstream hydroxylation chamber, where it is mixed in a reaction zone with the pre-sensitized water, still under irradiation.
- the mixing is made to take place at a paraxial focus, where the ionization kinetics are most aggressive and the principal oxidative destruction of organic compounds occurs.
- the activated oxidizing reagent, containing free radicals, and the microwave and photosensitized water, are thus mixed vigorously at a point where incident concentrated deep UV radiation irradiates both fluids at once, to enhance the chemical degradation reaction.
- a principal feature of a preferred embodiment of the invention is the simultaneous activation of pure oxidizing reagent with direct UV light and secondary photolysis and sensitization of contaminated water with UV radiation emitted from the walls of tubes
- Electrotron positioned to direct high energy electromagnetic waves into the angular path of influent water circulating in a vortex around the tubes.
- the invention contemplates the use of a concentrated beam of deep spectrum ultraviolet light, which is manipulated using an optical array to simultaneously irradiate a reagent such as hydrogen peroxide and to irradiate out of fluid contact with the reagent (and preferably in an environment charged with microwave radiation) water to be treated.
- a reagent such as hydrogen peroxide
- the water and the reagent are then mixed vigorously, under continued UV irradiation to optimize oxidation of water-borne contaminants.
- a prime advantage of the above-described peroxide photolysis ionizer is that a maximum number of free radicals are produced using one UV source, which is itself safely and efficiently located separate from the reaction chamber. Presensitization of the water by photolysis enhances the ultimate reaction of the contaminants with the free radicals during subsequent hydroxylation.
- all of the fluid to be treated is preferably made to converge at a narrow vertex where a concentrated beam of UV light of optimal wavelength is directed. This minimizes the energy needed to generate free radicals while maximizing the treatment volume capability of the apparatus.
- the present invention may be used to good advantage as part of a comprehensive water treatment system in an industrial setting requiring the removal and rapid destruction of recalcitrant contaminants from water, within a minimal space.
- the present invention may be incorporated into a system comprising a coalescing separator for receiving waste water, a multi-stage turbo-aspiration unit, and one or more peroxide photolysis ionizers of the above-described type associated with the various stages of the turbo- aspiration unit. All of the above components, it has been found, can be mounted on the chassis of a small truck or trailer for portability.
- Figure 1 is a side elevation view, in cross section, of a chamber assembly of the peroxide photolysis ionizer of the present invention
- Figure 2 is a front elevation view, in cross section, of an arc lamp and associated fiber optic transmission bundles for use in the present invention
- Figure 3 is a plan view of a ringjet water flow control ring used in the invention
- Figure 4 is a cross-sectional view of the ringjet water flow control ring shown in Figure 3, taken along the line 4-4 in Figure 3;
- Figure 5 is a diagrammatic detail view, illustrating the manner in which the ringjet water flow control ring controls the volume of water flow in apparatus in accordance with the invention
- Figure 6 is a detail view, in side elevation, illustrating a vernier control element for the ringjet flow control ring;
- Figure 6a is an end elevation view of the vernier control depicted in Figure 6, showing the manner in which the control element cooperates with the ringjet flow control ring.
- Figure 7 is a side elevation view of a photolysis chamber in accordance with the invention.
- Figure 8 is a top view of a photolysis chamber in accordance with the invention.
- Figure 9 is an end view, in cross-section, taken along the line 9-9 in Figure 1;
- FIG. 10 is a flow diagram of a water treatment system in accordance with the invention. Detailed Description of the Invention
- FIG. 1 an ionizing reactor, designated generally by the reference numeral 10.
- the reactor 10 comprises, in general, a photolysis chamber assembly, designated generally by the reference numeral 12, and a hydroxyl reactor chamber, designated generally by the reference numeral 14.
- the photolysis chamber assembly 12 consists, in the illustrated embodiment, of a generally elongated cylindrical shell 16, preferably of stainless steel. Associated with the shell 16 is a water injection port 18. As is perhaps best seen in Figures 7 and 8, the port 18 is so arranged and orientated with respect to the longitudinal axis "A" of the shell 16 that a stream of water flowing through the port 18 will impinge on the curved interior wall 20 of the shell 16 and assume a helical or volute path, designated diagrammatically in Figure 7 as "V". Referring now to Figure 8, it will be seen that in a transverse cross-sectional view, the port 18 enters tangentially with respect to the circular cross- section of the shell 16.
- the longitudinal axis "B" of the water port 18 is oblique with respect to the axis "A" of the shell 16, thus encouraging development of the desired helical or volute flow of water within the shell 16.
- the shell 16 is supported and retained by an end flange 22 (which may also be referred to as an "access flange”, and a ringjet flange 24, which will be described in greater detail below.
- Suitable numbers of assembly rods 26 join the end flange 22 and ringjet flange 24 at locations around their respective peripheries. The rods 26 serve to retain respective ends of the shell 16 in peripheral seats 28 and 30 in the end flange 22 and ringjet flange 24, respectively.
- a hyperbolic reflector body 32 associated with the ringjet flange 24 within the shell 16 when the photolysis chamber assembly 12 is assembled, is a hyperbolic reflector body 32, with a quadratic surface, shaped to direct radiation within the shell 16 for maximum effect.
- the reflector body 32 is preferably fabricated of highly polished aluminum, sputter-coated with sapphire to provide abrasion and corrosion protection and to optimize spectral reflectivity.
- Bolts 34 secure the reflector 32 to the ringjet flange 24.
- a flow control ring 36 (seen in detail in Figure 3 and 4 and described below)
- a vernier control 38 (also discussed below) for the flow control ring 36.
- a suitable gasket 42 is ⁇ in ⁇
- a magnetron 46 Associated with the shell 16, at a position generally juxtaposed to the water port 18, is a magnetron 46.
- the magnetron 46 is associated with a microwave- transparent "window" 48, which enables microwave radiation produced by the magnetron 46 to enter the shell 16 and impinge upon water entering the shell 16 through the port 18.
- a cooling fan 49 or other suitable cooling arrangement may be provided for the magnetron.
- quartz tubes 50, 52 and 54 Associated with the access flange 22 are quartz tubes 50, 52 and 54.
- the quartz tubes 50-54 extend, as is seen in Figures 1 and 9, into association with the ringjet flange 24, and include, in the vicinity of the ringjet flange 24, tapered nozzle ends 56.
- Jam nuts 58 with suitable gasket features, secure the upper ends of the quartz tubes 50-54 to the access flange 22.
- T- fittings Associated with the upper ends of the quartz tubes 50-54 are T- fittings, of which the T-fitting 60 associated with the quartz tube 54 is typical.
- the T-fitting 60 provides an inlet 62 for reagent, as well as a coupling 64 to facilitate attachment of a reagent supply conduit 66.
- the quartz tubes 50-54 traverse the length of the photolysis chamber 12, in a direction parallel to the axis "A" .
- fiber optic sources of which the illustrated source 68, a fiber optic conductor, may be considered typical.
- the fiber optic conductors 68 are coupled to the respective quartz tubes, such as the quartz tube 52, by fiber optic couplers, such as the coupler 70, and the upper ends of the quartz tubes 50-54 are sealed at the couplers by quartz windows, such as illustrated quartz window 72 associated with the tube 54.
- the conductors 68 are preferably of the high deep UV transmission fluid-filled type.
- the illustrated source provides an arc lamp 76, disposed within an ellipsoidal reflector 78, both within a housing 80.
- a trifurcated optic collector 82 is juxtaposed to the reflector 78 and associated with respective ends of fiber optic conductors such as the above-described fiber optic conductor 68. It will be understood that each fiber optic conductor 68 is associated with one of the quartz tubes 50-54.
- a cross- slide mechanism 84 associated with the housing 80 and arc lamp 76, provides for focus and alignment adjustments for the arc lamp. Any suitable mechanism may be used for incremental adjustment of the position of the arc lamp 76. Suitable adjustment wheels or knobs 86 (for arc lamp alignment) and 88 (for focus) are provided.
- the arc lamp may be a 350 watt high pressure short arc mercury-xenon lamp, of the kind presently commercially available from Advanced Radiation Corp., Ushio Corp. and Ultra Violet Products, among others.
- the application of UV radiation to the quartz tubes 50-54 in the above manner results in irradiation of the hydrogen peroxide flowing through the tubes 50-54, and, by Lambertian diffusion, irradiation of the photolysis chamber 12.
- the chamber 12 is preferably also simultaneously subjected to microwave radiation produced by the magnetron 46, so that water in the photolysis chamber 12 is irradiated and sensitized by the concurrent microwave and UV photon impingement.
- the peroxide reagent is continuously activated by direct UV radiation during its internal course along the length of the tubes 50-54.
- the reagent also serves as a light pipe, conducting UV radiation to the hydroxyl reactor chamber 14.
- the ringjet flange 24 is provided with a circular array of water orifices 90 (twelve in the illustrated embodiment) , extending through the ringjet flange at a preferred angle of 20° with respect to the longitudinal axis "A" of the hydroxyl reactor chamber 14.
- the illustrated orifices 90 are evenly distributed around the periphery of the ringjet flange 24, and at the same radial distance from the center of the ringjet flange.
- the respective longitudinal center lines "L" of the orifices 90 converge at a locus (or focal point) "F" .
- the activated oxidizing reagent (hydrogen peroxide) emerging from the tubes 50-54 exits from the nozzle ends 56 into the hydroxyl reactor chamber 24 at the positions perhaps best seen in Figures 1 and 9.
- the reagent exits within the circle of the orifices 90, and into a zone adjacent the locus or focal point "F", where the activated oxidizing reagent containing free radicals and the microwaved and photosensitized water are mixed.
- the UV radiation conducted by the reagent in the quartz tubes 50- 54 is likewise transmitted to the hydroxyl reactor chamber 14, where the incident concentrated radiation continues the irradiation of both fluids as mixing occurs.
- the ringjet flange 24 has in one of its surfaces a circular recess 94.
- the flow control ring 36 is also circular, and has an outer diameter which allows it to be received in the recess 94.
- the flow control ring 36 has a central clearance opening and an array of orifices 98, corresponding in number to the number of orifices 90 of the ringjet flange 24.
- the orifices 98 extend through the flow control ring 36 at an angle corresponding to the angle of the orifices 90 of the ring jet flange 24 (here 20°) .
- the orifices 98 of the flow control ring 36 are disposed at the same radial distance from the center of the flow control ring 36, that distance being selected so that the orifices 98, when aligned with the orifices 90, form respective continuous passages of circular cross section.
- the flow control ring 36 has a peripheral edge 100, interrupted at one point by a radially directed drive slot 102.
- the vernier control 38 is mounted in the ringjet flange 24.
- the vernier control 38 has an eccentrically mounted drive pin 104, which projects into the drive slot 102 (as is perhaps best seen in Figures 1 and 6a) . Rotation, therefore, of the vernier control 38 causes the drive pin 104 to rotate the flow control ring 36 relative to the ringjet flange as the pin 104 traverses the height of the slot 102.
- Rotation of the flow control ring 36 relative to the ringjet flange 24 causes offset of the orifices 90 and 98, as seen for example in Figure 5, and consequent reduction of the flow area provided by the orifices.
- the total area of the orifices available for transfer of water between the chambers 12 and 14, and hence the flow volume and velocity may be finely adjusted.
- FIG 10 illustrates a water treatment system in accordance with the invention, in which the above- ionizing reactor cooperates with a number of known components assembled in a unique manner, to provide efficient treatment of contaminated water.
- the system designated generally by the reference numeral 106, includes a coalescing separator 108, into which influent is introduced at 110. Heavy sediments and immiscible fluids are mechanically separated from the influent and removed at the sediment drain 112. Lighter contaminants, such as hydrocarbons in the liquid phase, are drawn off at a conduit 114 to a collection and storage drum 116. The remaining water, still containing organic contaminants, is withdrawn from the separator 108 through the conduit 118, and pumped as input into a tubro- aspirated sparger 120.
- Oxidizing reagent such as hydrogen peroxide, is provided to the reactor 10 from a storage drum 124, by means of a metering pump 126 and conduit 128.
- the effluent from the ionizing reactor 10 is introduced into a second sparger 130, whose off gasses are drawn off into the manifold 122.
- the efflux from the sparger 130 is pumped through a conduit 132 to a third sparger 134 (also associated with the manifold 122) , and from the third sparger 134 through a conduit 136 to a fourth sparger 138 (also associated with the manifold 122) .
- Clean water is discharged from the sparger 138 at a conduit 140.
- An aspirator 142 may advantageously be associated with each sparger 120, 130, 134 and 138.
Abstract
Apparatus and a method are disclosed for decontaminating water, using an ionizing reactor. Water contaminated by organic compounds is introduced into a chamber (12) in which it is concurrently irradiated by microwave source (46) and an ultraviolet source (76) to activate it by photolysis. The water is then introduced to a hydroxyl reactor chamber (14). An oxidizing reagent is irradiated by subjecting it to the UV source and conducting it through the chamber (12), without mixing it with the water. The activated water and irradiated oxidizing agent are then vectored to a locus ('F') at which they are mixed under UV from the source (76). The apparatus and method may be incorporated into a water treatment system employing existing contaminant extraction techniques, such as immiscible fluids separation and turbo-aspirated sparging.
Description
WATER DECONTAMINATION USING A PHOTOLYSIS IONIZER
Background of the Invention
This invention relates to a water treatment method and an apparatus, and more particularly, to a method and apparatus for the removal from aqueous fluid of toxic and potentially hazardous organic compounds. The present method and apparatus exploit, synergistically, ultraviolet photolysis, the use of hydroxyl radicals, and microwave energy to, optimize the oxidation of organic contaminants in water.
The use of ultraviolet light and oxidants, such as ozone and hydrogen peroxide, to produce hydroxyl radicals, is well-known. Such a technique has been used to enhance oxidation of organic contaminants in industrial waste water, groundwater and other aqueous solutions. Direct photolysis of organic compounds by intense ultraviolet light is also well known and is used extensively in the water treatment industry. Microwave radiation (electromagnetic waves having a wavelength between about 0.3 and 30 centimeters) is commonly used to induce rapid heating of materials from within by oscillatory stimulation of hydrogen and nitrogen atoms within water and organic molecules. Oxidation of organic contaminants by ultraviolet light or by chemical reaction with hydrogen peroxide ultimately yields innocuous products: carbon dioxide, elemental carbon, water and oxygen.
It has now been found that exploitation of the above techniques in a single compact apparatus creates a potent oxidative water treatment method.
Existing apparatus and methods, using ultraviolet (UV) light and reagents such as hydrogen peroxide to create hydroxyl radicals, are able to treat substantial volumes of water, on the order of hundreds of gallons per minute. In "first generation" systems of this sort, it was proposed that low pressure UV discharge lamps be encased in quartz tubes immersed in tanks of water to be treated. Hydrogen peroxide was added to the water, and the mixture was allowed to flow around the submerged lamps. Problems with rapid fouling of the lamps and low production of hydroxyl radicals in such devices soon became apparent. Second generation apparatus of the above type incorporated manual cleaning mechanisms, and the use of polymer coatings (such as "Teflon" PTFE) on the quartz sleeve, additional oxidizers (such as ozone) , and catalyzing additives (such as Tiθ2) to enhance the rate of radical production. Lasers also have been used in efforts to increase energy transfer efficiency. Some efforts were successful to some extent, but at the price of significantly greater complexity and cost.
In known prior art apparatus and methods, the oxidizing reagent is added to the water prior to exposure of the mixture to the UV radiation. Since chemical oxidation is rapid, in such arrangements inorganic precipitates quickly form on the quartz sleeve or window
surfaces, resulting in immediate and cumulative attenuation of the UV radiation.
Moreover, in known prior art apparatus and methods, addition of the oxidizing reagent to the water prior to UV exposure results in dilution of the reagent, so that the photon density of the UV radiation reaching the oxidant molecules is reduced by preferential absorption by the water, scattering and absorption by entrained particles in the water, and absorption by solutes. Sluggish mixing of the solution during irradiation also minimizes contact of the few radicals that are produced close to the light source, resulting in a relatively inefficient and certainly less than optimal capability for contaminant destruction.
The present invention provides a method and apparatus which addresses and obviates the above shortcomings of the prior art, by synergistically enhancing contaminant destruction by complementary techniques.
Summary of the Invention
In one of its aspects, the present invention provides, for use in the treatment of waste water, an ionizing reactor for photochemically oxidizing organic compounds in aqueous solutions, using microwave-assisted photolysis and hydroxyl radical oxidation. The photolysis, production of hydroxyl radicals and the final
hydroxylation reaction are all effected using a high pressure UV short arc lamp. Peroxide activation is made to take place in such a manner that a pure reagent is continuously irradiated, thus maximizing O3 and Hθ2+ and OH+ radical production. The reagent, thus activated, is injected into a downstream hydroxylation chamber, where it is mixed in a reaction zone with the pre-sensitized water, still under irradiation. The mixing is made to take place at a paraxial focus, where the ionization kinetics are most aggressive and the principal oxidative destruction of organic compounds occurs. The activated oxidizing reagent, containing free radicals, and the microwave and photosensitized water, are thus mixed vigorously at a point where incident concentrated deep UV radiation irradiates both fluids at once, to enhance the chemical degradation reaction.
Thus, a principal feature of a preferred embodiment of the invention is the simultaneous activation of pure oxidizing reagent with direct UV light and secondary photolysis and sensitization of contaminated water with UV radiation emitted from the walls of tubes
(preferably of quartz) which carry the oxidizing reagent, and with microwave radiation from a microwave source
(magnetron) positioned to direct high energy electromagnetic waves into the angular path of influent water circulating in a vortex around the tubes.
In its method aspect, the invention contemplates the use of a concentrated beam of deep spectrum ultraviolet light, which is manipulated using an optical
array to simultaneously irradiate a reagent such as hydrogen peroxide and to irradiate out of fluid contact with the reagent (and preferably in an environment charged with microwave radiation) water to be treated. The water and the reagent are then mixed vigorously, under continued UV irradiation to optimize oxidation of water-borne contaminants.
A prime advantage of the above-described peroxide photolysis ionizer is that a maximum number of free radicals are produced using one UV source, which is itself safely and efficiently located separate from the reaction chamber. Presensitization of the water by photolysis enhances the ultimate reaction of the contaminants with the free radicals during subsequent hydroxylation.
Because the hydroxylation reaction occurs downstream from any light transmitting or reflecting surfaces, it does not contribute to precipitate fouling of those surfaces, a common problem in the prior art.
As indicated above, all of the fluid to be treated is preferably made to converge at a narrow vertex where a concentrated beam of UV light of optimal wavelength is directed. This minimizes the energy needed to generate free radicals while maximizing the treatment volume capability of the apparatus.
The present invention may be used to good advantage as part of a comprehensive water treatment
system in an industrial setting requiring the removal and rapid destruction of recalcitrant contaminants from water, within a minimal space. In one of its embodiments, the present invention may be incorporated into a system comprising a coalescing separator for receiving waste water, a multi-stage turbo-aspiration unit, and one or more peroxide photolysis ionizers of the above-described type associated with the various stages of the turbo- aspiration unit. All of the above components, it has been found, can be mounted on the chassis of a small truck or trailer for portability.
Brief Description of the Drawings
There are seen in the drawings forms of the invention which are presently preferred (and which constitute the best mode contemplated for carrying the invention into effect) , but it should be understood that the invention is not limited to the precise arrangements and instrumentalities shown.
Figure 1 is a side elevation view, in cross section, of a chamber assembly of the peroxide photolysis ionizer of the present invention;
Figure 2 is a front elevation view, in cross section, of an arc lamp and associated fiber optic transmission bundles for use in the present invention;
Figure 3 is a plan view of a ringjet water flow control ring used in the invention;
Figure 4 is a cross-sectional view of the ringjet water flow control ring shown in Figure 3, taken along the line 4-4 in Figure 3;
Figure 5 is a diagrammatic detail view, illustrating the manner in which the ringjet water flow control ring controls the volume of water flow in apparatus in accordance with the invention;
Figure 6 is a detail view, in side elevation, illustrating a vernier control element for the ringjet flow control ring;
Figure 6a is an end elevation view of the vernier control depicted in Figure 6, showing the manner in which the control element cooperates with the ringjet flow control ring.
Figure 7 is a side elevation view of a photolysis chamber in accordance with the invention;
Figure 8 is a top view of a photolysis chamber in accordance with the invention;
Figure 9 is an end view, in cross-section, taken along the line 9-9 in Figure 1; and
Figure 10 is a flow diagram of a water treatment system in accordance with the invention.
Detailed Description of the Invention
Referring now to the drawings in detail, wherein like elements are designated by like reference numerals, there is seen in Figure 1 an ionizing reactor, designated generally by the reference numeral 10. The reactor 10 comprises, in general, a photolysis chamber assembly, designated generally by the reference numeral 12, and a hydroxyl reactor chamber, designated generally by the reference numeral 14.
Referring now to Figures 7 and 8 in addition to
Figure 1, the photolysis chamber assembly 12 consists, in the illustrated embodiment, of a generally elongated cylindrical shell 16, preferably of stainless steel. Associated with the shell 16 is a water injection port 18. As is perhaps best seen in Figures 7 and 8, the port 18 is so arranged and orientated with respect to the longitudinal axis "A" of the shell 16 that a stream of water flowing through the port 18 will impinge on the curved interior wall 20 of the shell 16 and assume a helical or volute path, designated diagrammatically in Figure 7 as "V". Referring now to Figure 8, it will be seen that in a transverse cross-sectional view, the port 18 enters tangentially with respect to the circular cross- section of the shell 16. Referring to Figure 7, it will be seen that the longitudinal axis "B" of the water port 18 is oblique with respect to the axis "A" of the shell 16, thus encouraging development of the desired helical or volute flow of water within the shell 16.
Referring again to Figure 1, the shell 16 is supported and retained by an end flange 22 (which may also be referred to as an "access flange", and a ringjet flange 24, which will be described in greater detail below. Suitable numbers of assembly rods 26 join the end flange 22 and ringjet flange 24 at locations around their respective peripheries. The rods 26 serve to retain respective ends of the shell 16 in peripheral seats 28 and 30 in the end flange 22 and ringjet flange 24, respectively.
Referring again to Figure 1, associated with the ringjet flange 24 within the shell 16 when the photolysis chamber assembly 12 is assembled, is a hyperbolic reflector body 32, with a quadratic surface, shaped to direct radiation within the shell 16 for maximum effect. The reflector body 32 is preferably fabricated of highly polished aluminum, sputter-coated with sapphire to provide abrasion and corrosion protection and to optimize spectral reflectivity. Bolts 34 secure the reflector 32 to the ringjet flange 24.
Also associated with the ringjet flange 24 is a flow control ring 36 (seen in detail in Figure 3 and 4 and described below) , and a vernier control 38 (also discussed below) for the flow control ring 36.
Secured to_ the ringjet flange 24, as by bolts
40, is a tubular hydroxyl reactor chamber 14, which includes a water outlet port 44. A suitable gasket 42 is
■in¬
disposed between the reactor chamber 14 and the ringjet flange 24.
Other aspects of the ionizing reactor 10 will now be described in detail.
Associated with the shell 16, at a position generally juxtaposed to the water port 18, is a magnetron 46. The magnetron 46 is associated with a microwave- transparent "window" 48, which enables microwave radiation produced by the magnetron 46 to enter the shell 16 and impinge upon water entering the shell 16 through the port 18. A cooling fan 49 or other suitable cooling arrangement may be provided for the magnetron.
Associated with the access flange 22 are quartz tubes 50, 52 and 54. The quartz tubes 50-54 extend, as is seen in Figures 1 and 9, into association with the ringjet flange 24, and include, in the vicinity of the ringjet flange 24, tapered nozzle ends 56. Jam nuts 58, with suitable gasket features, secure the upper ends of the quartz tubes 50-54 to the access flange 22. Associated with the upper ends of the quartz tubes 50-54 are T- fittings, of which the T-fitting 60 associated with the quartz tube 54 is typical. The T-fitting 60 provides an inlet 62 for reagent, as well as a coupling 64 to facilitate attachment of a reagent supply conduit 66. The quartz tubes 50-54 traverse the length of the photolysis chamber 12, in a direction parallel to the axis "A" .
Also associated with the quartz tubes 50-54 are fiber optic sources, of which the illustrated source 68, a fiber optic conductor, may be considered typical. The fiber optic conductors 68 are coupled to the respective quartz tubes, such as the quartz tube 52, by fiber optic couplers, such as the coupler 70, and the upper ends of the quartz tubes 50-54 are sealed at the couplers by quartz windows, such as illustrated quartz window 72 associated with the tube 54. The conductors 68 are preferably of the high deep UV transmission fluid-filled type.
It will now be apparent that hydrogen peroxide introduced to the quartz tubes 50-54 through supply conduits, such as the conduit 66, will flow the length of the quartz tubes 50-54 and the photolysis chamber 12, to emerge at the nozzle ends 56 of the quartz tubes 50-54.
Referring now to Figure 2, an exemplary ultraviolet source is seen. The illustrated source provides an arc lamp 76, disposed within an ellipsoidal reflector 78, both within a housing 80. A trifurcated optic collector 82 is juxtaposed to the reflector 78 and associated with respective ends of fiber optic conductors such as the above-described fiber optic conductor 68. It will be understood that each fiber optic conductor 68 is associated with one of the quartz tubes 50-54. A cross- slide mechanism 84, associated with the housing 80 and arc lamp 76, provides for focus and alignment adjustments for the arc lamp. Any suitable mechanism may be used for incremental adjustment of the position of the arc lamp 76. Suitable adjustment wheels or knobs 86 (for arc lamp
alignment) and 88 (for focus) are provided. The arc lamp may be a 350 watt high pressure short arc mercury-xenon lamp, of the kind presently commercially available from Advanced Radiation Corp., Ushio Corp. and Ultra Violet Products, among others.
The application of UV radiation to the quartz tubes 50-54 in the above manner results in irradiation of the hydrogen peroxide flowing through the tubes 50-54, and, by Lambertian diffusion, irradiation of the photolysis chamber 12. The chamber 12 is preferably also simultaneously subjected to microwave radiation produced by the magnetron 46, so that water in the photolysis chamber 12 is irradiated and sensitized by the concurrent microwave and UV photon impingement. The peroxide reagent is continuously activated by direct UV radiation during its internal course along the length of the tubes 50-54. The reagent also serves as a light pipe, conducting UV radiation to the hydroxyl reactor chamber 14.
Referring now to Figures 3, 4 and 9, the manner in which activated reagent and sensitized water are directed to a paraxial focus point in the hydroxyl reactor chamber 14 (where conducted UV radiation traveling axiality through the reagent also impinges on the fluids) which will now be described. It will be understood that the principal oxidation reaction produced by the reactor 10 occurs at this locus, and may be further enhanced by mixing in a downstream turbo-aspirated sparging apparatus, as will be described below.
Referring now to Figures 1, 3, 4 and 9, the ringjet flange 24 is provided with a circular array of water orifices 90 (twelve in the illustrated embodiment) , extending through the ringjet flange at a preferred angle of 20° with respect to the longitudinal axis "A" of the hydroxyl reactor chamber 14. The illustrated orifices 90 are evenly distributed around the periphery of the ringjet flange 24, and at the same radial distance from the center of the ringjet flange. As is seen in Figure 1, the respective longitudinal center lines "L" of the orifices 90 converge at a locus (or focal point) "F" . The activated oxidizing reagent (hydrogen peroxide) emerging from the tubes 50-54 exits from the nozzle ends 56 into the hydroxyl reactor chamber 24 at the positions perhaps best seen in Figures 1 and 9. The reagent exits within the circle of the orifices 90, and into a zone adjacent the locus or focal point "F", where the activated oxidizing reagent containing free radicals and the microwaved and photosensitized water are mixed. The UV radiation conducted by the reagent in the quartz tubes 50- 54 is likewise transmitted to the hydroxyl reactor chamber 14, where the incident concentrated radiation continues the irradiation of both fluids as mixing occurs.
The manner in which the rate of water flow between the photolysis chamber 12 and hydroxyl reactor chamber 14 may be controlled will now be described.
Referring to Figure 1, the ringjet flange 24 has in one of its surfaces a circular recess 94. The flow control ring 36 is also circular, and has an outer
diameter which allows it to be received in the recess 94. Referring to Figure 5, the flow control ring 36 has a central clearance opening and an array of orifices 98, corresponding in number to the number of orifices 90 of the ringjet flange 24. The orifices 98 extend through the flow control ring 36 at an angle corresponding to the angle of the orifices 90 of the ring jet flange 24 (here 20°) . The orifices 98 of the flow control ring 36 are disposed at the same radial distance from the center of the flow control ring 36, that distance being selected so that the orifices 98, when aligned with the orifices 90, form respective continuous passages of circular cross section.
Referring now to Figure 3, it will be seen that the flow control ring 36 has a peripheral edge 100, interrupted at one point by a radially directed drive slot 102. Referring to Figure 1, the vernier control 38 is mounted in the ringjet flange 24. The vernier control 38 has an eccentrically mounted drive pin 104, which projects into the drive slot 102 (as is perhaps best seen in Figures 1 and 6a) . Rotation, therefore, of the vernier control 38 causes the drive pin 104 to rotate the flow control ring 36 relative to the ringjet flange as the pin 104 traverses the height of the slot 102. Rotation of the flow control ring 36 relative to the ringjet flange 24 causes offset of the orifices 90 and 98, as seen for example in Figure 5, and consequent reduction of the flow area provided by the orifices. Thus, the total area of the orifices available for transfer of water between the
chambers 12 and 14, and hence the flow volume and velocity, may be finely adjusted.
Figure 10 illustrates a water treatment system in accordance with the invention, in which the above- ionizing reactor cooperates with a number of known components assembled in a unique manner, to provide efficient treatment of contaminated water. Referring now to Figure 10, the system, designated generally by the reference numeral 106, includes a coalescing separator 108, into which influent is introduced at 110. Heavy sediments and immiscible fluids are mechanically separated from the influent and removed at the sediment drain 112. Lighter contaminants, such as hydrocarbons in the liquid phase, are drawn off at a conduit 114 to a collection and storage drum 116. The remaining water, still containing organic contaminants, is withdrawn from the separator 108 through the conduit 118, and pumped as input into a tubro- aspirated sparger 120. Off gas from the sparger is removed through a manifold 122, and the water output of the sparger is directed and pumped to the water inlet port 18 of an ionizing reactor 10. Oxidizing reagent, such as hydrogen peroxide, is provided to the reactor 10 from a storage drum 124, by means of a metering pump 126 and conduit 128.
The effluent from the ionizing reactor 10 is introduced into a second sparger 130, whose off gasses are drawn off into the manifold 122. The efflux from the sparger 130 is pumped through a conduit 132 to a third sparger 134 (also associated with the manifold 122) , and
from the third sparger 134 through a conduit 136 to a fourth sparger 138 (also associated with the manifold 122) . Clean water is discharged from the sparger 138 at a conduit 140. An aspirator 142 may advantageously be associated with each sparger 120, 130, 134 and 138.
It will be appreciated that, although four spargers (and thus four sparging stages) are shown, the present invention may be used with other numbers of sparging stages. Various commercially available sparging units are suitable for use in the above-described system.
The present invention may be embodied in other specific forms without departing from its spirit or essential attributes. Accordingly, reference should be made to the appended claims, rather than the foregoing specification, as indicating the scope of the invention.
Claims
1. For use in the treatment of water, apparatus comprising a first chamber, a water inlet port in fluid communication with said first chamber, conduit means disposed in said first chamber for conducting an oxidizing reagent through said chamber out of fluid contact with water in said chamber, a second chamber in fluid communication with said first chamber, an ultraviolet radiation source operatively coupled with said first and second chambers, said ultraviolet radiation source being disposed to simultaneously irradiate water in said first chamber and reagent in said conduit means, nozzle means associated with said conduit means for injecting reagent into said second chamber, and an orifice for conducting and directing water from said first to said second chamber, said orifice directing the water toward a mixing zone, whereby the water and the reagent are mixed in said second chamber under ultraviolet radiation from said radiation source.
2. Apparatus in accordance with claim 1, and a magnetron operatively coupled to said first chamber and juxtaposed to said water inlet port, whereby water in said first chamber is subjected to microwave radiation while being irradiated by ultraviolet.
3. Apparatus in accordance with claim 1, wherein said mixing zone is a focal zone, said orifice providing a plurality of water streams directed from different directions toward said focal zone.
4. Apparatus in accordance with claim 2, wherein said first chamber is cylindrical and has a longitudinal axis, and said water inlet port is transversely and obliquely oriented with respect to said longitudinal axis, whereby water in said first chamber is directed into a helical path.
5. Apparatus in accordance with claim 4, wherein said orifice comprises a ringjet, said ringjet providing a plurality of water streams into said second chamber in the direction of said focal zone.
6. Apparatus in accordance with claim 5, wherein said ringjet is adjustable, whereby the volume of water in the plurality of water streams is adjustable.
7. Apparatus in accordance with claim 1, wherein said conduit means comprise light conducting tubes extending through said first chamber and into communication with said second chamber, said ultraviolet radiation source comprising a lamp and light conductors operatively interconnecting said lamp and said conduit means, and inlets associated with said conduit means for introducing reagent into said conduit means.
8. Apparatus in accordance with claim 7, wherein said mixing zone is a focal zone, said orifice comprising a ringjet providing a plurality of water streams from different directions toward said focal zone.
9. Apparatus in accordance with claim 7, and a magnetron operatively coupled to said first chamber and juxtaposed to said water inlet port, whereby water in said first chamber is subjected to microwave radiation while being irradiated by ultraviolet radiation.
10. Apparatus in accordance with claim 9, wherein said mixing zone is a focal zone, said orifice comprising a ringjet providing a plurality of water streams from different directions toward said focal zone.
11. Apparatus in accordance with claim 10, wherein said conduit means comprise quartz tubes, and a reflector in said first chamber for enhancing the distribution of ultraviolet radiation in said chamber.
12. Apparatus in accordance with claim 11, wherein said reflector has a quadratic surface.
13. Apparatus in accordance with claim 12, wherein said reflector has a sapphire coating.
14. For use in the treatment of water, an ionizing reactor comprising a cylindrical body having a longitudinal axis and first and second coaxial chambers; a water inlet port operatively associated with said first chamber and angularly offset from said longitudinal axis so that a water stream entering said first chamber from said inlet port assumes therein a helical path; conduit means traversing said first chamber for conveying an oxidating reagent through said first chamber out of fluid contact with water in said first chamber, said conduit means being constructed of light-conducting material and extending into light transmitting association with said second chamber; means associated with said conduit means for introducing into said conduit means a stream of oxidizing reagent, a source of ultraviolet radiation operatively coupled to said conduit means so that the application of ultraviolet radiation to said conduit means simultaneously irradiates reagent in said conduit means and water in said first chamber; an orifice directing water from said first to said second chamber, said orifice providing a plurality of convergent water streams directed toward a focal zone, nozzles associated with said conduit means for injecting reagent into said second chamber toward said focal zone, ultraviolet radiation transmitted to said second chamber irradiating water and reagent in said second chamber.
15. Apparatus in accordance with claim 14, and a source of microwave energy operatively associated with said first chamber for subjecting water in said first chamber to microwave radiation.
16. A method for the removal of contaminants from water, comprising the steps of: a. providing a first and a second reaction chamber and a source of ultraviolet radiation operatively associated therewith; b. introducing into the first reaction chamber a stream of water; c. providing a stream of oxidizing reagent out of fluid contact with the stream of water; d. simultaneously subjecting the water and the oxidizing reagent to the ultraviolet radiation to irradiate them and hydrolyze the reagent; e. introducing the irradiated water and hydrolyzed reagent to the second reaction chamber; and f. mixing the water and the reagent in the second chamber while subjecting the water and the reagent to ultraviolet radiation from the source.
17. A method in accordance with claim 16, and the further step of : g. subjecting the water in the first reaction chamber to microwave radiation while conducting said step of subjecting the water and the oxidizing reagent to the ultraviolet radiation.
18. A method in accordance with claim 17, wherein said step b. is so conducted as to direct the stream of water into helical flow within the first reaction chamber.
19. A method in accordance with claim 17, wherein said step e. comprises the further step of : h. directing the water and the reagent to a focal zone,
20. A .method in accordance with claim 16, wherein said step d. and said step f. comprise the further steps of: i. providing in the first chamber a plurality of light-conducting tubular members; j . so conducting said step c. that said stream of oxidizing reagent is made to flow through the tubular members; and k. conducting ultraviolet radiation from said source to respective ends of said tubular members, whereby scattering of ultraviolet radiation from said tubular members irradiates the water and the reagent in accordance with said step d., and radiation conducted by the tubular members and the reagent subjects the water and reagent in the second chamber to ultraviolet radiation from the source in accordance with said step f.
21. A method for the removal of contaminants from water, comprising the steps of: a. providing a first and a second reaction chamber and a source of ultraviolet radiation operatively associated therewith; b. introducing into the first reaction chamber a stream of water; c. providing a stream of oxidizing reagent and passing the stream of oxidizing reagent through the first reaction chamber out of fluid contact with the stream of water; d. simultaneously subjecting the water and the oxidizing reagent to the ultraviolet radiation to irradiate them and hydrolyze the reagent; e. introducing the irradiated water and hydrolyzed reagent to the second reaction chamber; and f. mixing the water and the reagent in the second chamber while subjecting the water and the reagent to ultraviolet radiation from the source.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/111,988 US5439595A (en) | 1993-08-25 | 1993-08-25 | Water decontamination method using peroxide photolysis ionizer |
US08/480,852 US5587069A (en) | 1993-08-25 | 1995-06-07 | Water decontamination apparatus using peroxide photolysis ionizer |
AU32391/95A AU3239195A (en) | 1995-08-04 | 1995-08-04 | Water decontamination using a photolysis ionizer |
PCT/US1995/009949 WO1997006106A1 (en) | 1993-08-25 | 1995-08-04 | Water decontamination using a photolysis ionizer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/111,988 US5439595A (en) | 1993-08-25 | 1993-08-25 | Water decontamination method using peroxide photolysis ionizer |
PCT/US1995/009949 WO1997006106A1 (en) | 1993-08-25 | 1995-08-04 | Water decontamination using a photolysis ionizer |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997006106A1 true WO1997006106A1 (en) | 1997-02-20 |
Family
ID=26789746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1995/009949 WO1997006106A1 (en) | 1993-08-25 | 1995-08-04 | Water decontamination using a photolysis ionizer |
Country Status (2)
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US (2) | US5439595A (en) |
WO (1) | WO1997006106A1 (en) |
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Also Published As
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US5439595A (en) | 1995-08-08 |
US5587069A (en) | 1996-12-24 |
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