Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3768258 A
Publication typeGrant
Publication dateOct 30, 1973
Filing dateMay 13, 1971
Priority dateMay 13, 1971
Publication numberUS 3768258 A, US 3768258A, US-A-3768258, US3768258 A, US3768258A
InventorsH Smith, D Saurenman
Original AssigneeConsan Pacific Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Polluting fume abatement apparatus
US 3768258 A
Abstract
Fume abatement apparatus comprises, in combination, A. AN EXHAUST DUCT FOR PASSING A STREAM OF ENGINE PRODUCTS OF COMBUSTION HAVING ELECTRICALLY CHARGEABLE CONTENT, AND B. MEANS INCLUDING AN ION GENERATOR TO EFFECT A FLOW OF IONS INTO SAID STREAM, WITH ION DENSITY AND POLARITY TO SO CHANGE THE ELECTRICAL CHARGE OF SAID CONTENT AS TO ENHANCE SUBSEQUENT PRECIPITATION THEREOF ON A SURFACE.
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

United States Patent i191 Smith et a1.

[ 1 Oct. 30, 1973 POLLUTING FUME ABATEMENT APPARATUS Inventors: Harold W. Smith, San Marino;

Donald G. Saurenman, Whittier, both of Calif.

Consan Pacific Incorporated, Whittier, Calif.

Filed: May 13, 1971 Appl. No.: 143,143

[73] Assignee:

U.S. Cl 60/275, 55/107, 55/131, 55/138, 55/146, 55/152, 55/D1G. 30, 60/297 Int. Cl F0ln-3/00 Field of Search 60/275, 297; 55/2, 55/146, 152, 155, 131, 138,120, DIG. 30,

r 102, 107, 140;317/2 E,2F, 3,4

References Cited UNITED STATES PATENTS Barr 60/320 3,331,192 7/1967 Peterson 55/107 Primary Examiner-Douglas Hart Attorney-White, Haefliger and Hachand [57] ABSTRACT Fume abatement apparatus comprises, in combination,

a. an exhaust duct for passing a stream of engine products of combustion having electrically chargeable content, and

b. means including an ion generator to effect a flow of ions into said stream, with ion density and polarity to so change the electrical charge of said content as to enhance subsequent precipitation thereof on a surface.

8 Claims, 3 Drawing Figures VO LTA 6 E SOURCE POLLUTING FUME ABATEMENT APPARATUS BACKGROUND OF THE INVENTION trostatics. Particularly, apparatus and methods involving modes of operation characterized by the present invention have not beenforthcoming. In this regard,.recent tests show that automobiles with attached conventional devices for controlling smog can produce around 200 billion submicron particles per cubic foot of exhaust, compared with about 100 billionsuch particles for old cars without such devices.

SUMMARY OF THE INVENTION It is a major object of the invention to provide internal combustion engine exhaust fume abatement apparatus comprising an exhaust duct for passing a stream of engine products of combustion having electrically chargeable content; and, means including an ion generator operating to effect a flow of ions into the stream, with ion density and polarity to so change the electrical charge of such content as to enhance subsequent precipitation on a surface. As will be seen, the generator may typically comprise multiple pointed tips proximate the duct, and a high voltage supply connected with the tips.

In one form of the invention, the tips may be exposed to the exhaust stream, and in another form an insulative shroud may protect the tips from direct exposure to the growing exhaust, the shroud defining an outlet for ions to pass from the tips to the stream path. As to the latter, means may be provided to pass auxiliary gas such as air to the tips to travel with the ions into the stream. Further, the duct downstream of the locus of ion flow into the stream may advantageously have an insulative inner surface exposed to the stream; the duct may comprise an exhaust pipe or stack extending horizontally or vertically; and the duct may direct the ion treated exhaust at the ground for charged particle collection.

These and other objects and advantages of the invention, as well as details of an illustrative embodiment, will be more fully understood from the following description and drawings, in which:

DRAWING DESCRIPTION FIGS. 1-3 are vertical sections showing different forms of the invention.

DETAILED DESCRIPTION In FIG. 1, an internal combustion engine, of Otto, Diesel, Wankel or other type, is indicated schematically at as delivering exhaust at 11 to the horizontal tail pipe or duct 12. Such products of combustion may have electrically chargeable content such as submicron particles and larger hydrocarbon molecules, and tests indicate that there are in excess of 100 billion submicron particles per cubic foot of exhaust.

In accordance with the invention, an ion generator is provided to effect a flow of ions into the exhaust stream 14 in the pipe, with ion density and polarity to so change the electrical charge of the content as to enhance substantially the subsequent precipitation of the latter on a surface. In this regard, the extent of duct 80 downstream of the ion generator may have an electrically insulative inner surface or coating (ceramic, plastic or other) at 15 exposed to the charged stream, preventing neutralization of the ions and particulate charge during discharge flow of the exhaust from the generator to the duct outlet 16. The latter may be directed downwardly to discharge the content 14 toward and at the ground surface 17, where the particles becomeneutralized and collect, removed from the atmosphere.

The ion generator in FIG. 1 includes multiple pointed tips 18 proximate to, as for example, within the duct 12, and ahigh voltage supply 19 electrically connected with the tips. The latter may be defined by metallic needle 20 diverging in a downstream direction and in a cluster as shown, as is more particularly described in U. S. Pat. No. 3,308,344 to Harold Smith and George A. Korkos, A lead 21 connects the source with the needles via a mounting rod or needle 22 which may be carried by streamlined insulator body 23. Further, an insulative shroud may project at 24 in protective relation to the tips to prevent direct impingement of exhaust flow on the tips, the shroud defining an outlet at 26 for ions to pass at 27 from the tips into the exhaust stream. Body 23, and shroud 24 may consist of insulative (as for example plastic) material. Radial ribs 28 may support the body and shroud in the duct 80. Other types of shrouds, supports and ion emitting configurations may be employed so long as the referred to functions and modes of operation are realized. Duct may be easily attached at 81 to pipe 12, and the latter carried at 83 by vehicle structure 84.

In FIG. 2, the engine 10a delivers exhaust to the duct 12 via a catalytic reactor 30 operating to change the molecular content of the flow to less noxious form. For example, CO may be oxidized to C0,, and NO dissociated to form N and O in the reactor. Particulate content emanating from the reactor is processed as described above and as to be described. The reactor 30 could alternatively be placed downstream of the ion generator.

The ion generator again includes multiple tips 31 to which high voltage, of selected polarity, is supplied. For example, over 5,000 volts DC negative may be employed, considering that the ground surface 17 to which the charged particles are to be attracted is normally positive. An insulative support for the needle cluster 31 as indicated at 33, and a shroud at 34.

Means is provided to pass auxiliary gas to the tips to travel with the ions into the exhaust flow 35. Such means may include an air scoop or pump 36 outside the duct 80, and a line 37 to deliver the air to the ion generator, as for example to porting 38 in the support 33 opening to the region 39 in the shroud containing the needle cluster. Such air flow 101 tends to prevent exhaust backflow into the shroud, keeping the needles and tips clean and free of exhaust deposits.

In FIG. 3, exhaust from engine 40 is delivered at 41 to a vertical pipe or stack 42 as is found on trucks carrying Diesel engines. Ion generators 43, shrouded at 50, are carried by the stack wall and with spacing such as to direct positive ions 102 into the upward flow 44 of exhaust. A charged particle trap, as for example, a negatively charged grid or grids 45 is mounted downstream of the generators 43. The generators may produce positive ions to positively charge the particulate content of the exhaust, voltage supply being indicated at 46. Trap 45 may alternatively consist of steel wool or the like, and may be removable replacement, as facilitated by removal of stock upper section 42a. An insulative screen or liner 48 extends within the stack between the ion generator 43 and the grid or grids.

We claim:

1. Internal combustion engine exhaust fume abatement apparatus comprising, in combination,

a. an exhaust duct for passing a stream of engine products of combustion having electrically chargeable content,

b. means including an ion generator comprising multiple pointed tips to effect a flow of ions into said stream, with ion density and polarity to so change the electrical charge of said content as to enhance subsequent precipitation thereof on a surface,

c. an insulative shroud for said tips and exposed to said stream in an upstream direction, the shroud extending in protective relation to the tips to prevent direct impingement thereon of the engine products of combustion, and the shroud defining a downstream facing outlet for ions to pass from the tips to the stream path downstream of the tips, and

d. the duct having an electrically insulative lining extending from a region upstream of said shroud outlet and at the exterior thereof to a region proximate an outlet to the atmosphere defined by the duct to inhibit neutralization of said ions during their flow in the duct.

2. The combination of claim 1 including an internal combustion engine operatively connected with said duct to supply said stream thereto.

3. The combination of claim 1 wherein said means includes a high voltage supply electrically connected with said tips.

4. The combination of claim 1 wherein said tips are exposed to said stream in a downstream direction, only.

5. The combination of claim 1 where said shroud tapers in an upstream direction and extends in the duct to reduce the duct cross sectional area thereby effecting an increase in the stream velocity past the shroud and tips for mixing with the ions 6. The combination of claim 5 including means to pass auxiliary gas to said tips to travel with the ions into the stream.

7. The combination of claim 1 wherein said ion generator includes a source of positive voltage in excess of +l0,000 volts to effect positive ion flow into the stream.

8. The combination of claim 1 wherein said duct is defined by a vehicle tail pipe with said duct outlet directed toward the ground underlying the vehicle.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2037692 *Apr 20, 1935Apr 21, 1936BarrExhaust oxidizing receiver
US3331192 *Mar 30, 1966Jul 18, 1967Peterson Floyd VElectrical precipitator apparatus of the liquid spray type
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3957374 *Jan 14, 1975May 18, 1976Carl Zeiss-StiftungApparatus for obtaining samples of dusts for analysis by spectrochemical examination
US4098578 *May 28, 1976Jul 4, 1978Stanton Anthony AIonization of exhaust gases
US4317661 *Aug 17, 1979Mar 2, 1982Matsushita Electric Industrial Co., Ltd.Electronic air cleaner
US4376637 *Oct 14, 1980Mar 15, 1983California Institute Of TechnologyApparatus and method for destructive removal of particles contained in flowing fluid
US4741746 *Jan 12, 1987May 3, 1988University Of IllinoisElectrostatic precipitator
US4908047 *Oct 9, 1987Mar 13, 1990Kerr-Mcgee Coal CorporationSoot removal from exhaust gas
US4999998 *Jan 17, 1989Mar 19, 1991E-Quad, Inc.Method and apparatus for elimination of toxic oxides from exhaust gases
US5041145 *May 15, 1990Aug 20, 1991Niles Parts Co., Ltd.Bridged stream corona generator
US5084078 *Nov 28, 1990Jan 28, 1992Niles Parts Co., Ltd.Exhaust gas purifier unit
US5147423 *Mar 1, 1991Sep 15, 1992Richards Clyde NCorona electrode for electrically charging aerosol particles
US5332425 *Feb 22, 1993Jul 26, 1994Hung Hsing Electric Co., Ltd.Air purifier
US5410871 *Mar 29, 1993May 2, 1995Unlimited Technologies, Inc.Emission control device and method
US5578112 *Jun 1, 1995Nov 26, 1996999520 Ontario LimitedModular and low power ionizer
US5707429 *Sep 25, 1996Jan 13, 1998Lewis Lint Trap, Inc.Ionizing structure for ambient air treatment
US5824137 *Jul 12, 1996Oct 20, 1998Gutsch; AndreasProcess and apparatus to treat gas-borne particles
US5948141 *Sep 30, 1997Sep 7, 1999Hewlett-Packard CompanyMethod and apparatus for purification of a discharge gas
US5950424 *Oct 7, 1996Sep 14, 1999Kabushiki Kaisya O - DenDiesel engine exhaust particle collection device
US6004375 *Oct 20, 1998Dec 21, 1999Gutsch; AndreasProcess and apparatus to treat gasborne particles
US6056808 *May 31, 1996May 2, 2000Dkw International Inc.Modular and low power ionizer
US6136074 *Nov 12, 1999Oct 24, 2000Funai Electric Co., Ltd.Air conditioning apparatus with an air cleaning function and electric dust collector for use in the same
US6156103 *May 28, 1999Dec 5, 2000Hewlett-Packard CompanyDischarge gas purification system
US6228149 *Jan 20, 1999May 8, 2001Patterson Technique, Inc.Method and apparatus for moving, filtering and ionizing air
US6436170 *Jun 23, 2000Aug 20, 2002Air Products And Chemical, Inc.Process and apparatus for removing particles from high purity gas systems
US6461409 *Mar 24, 2000Oct 8, 2002Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.Device and method for treating flowing gases, in particular exhaust gases
US6471752Oct 16, 2000Oct 29, 2002Lewis Lint Trap, Inc.Ionizing structure for ambient air treatment
US6506232 *Mar 13, 2001Jan 14, 2003Ion Systems, Inc.Air ionization apparatus and method for efficient generation and cleaning
US6517608Jun 28, 2002Feb 11, 2003Air Products And Chemicals, Inc.Process and apparatus for removing particles from high purity gas systems
US6527829 *Mar 15, 2000Mar 4, 2003Fortum OyjMethod and arrangement for purifying the intake air of a gas turbine
US6620224 *Aug 12, 2002Sep 16, 2003Kabushiki Kaisha CirclandAir purification device with a needle-shaped electrode having a protective cover thereon
US6656248 *Oct 3, 2001Dec 2, 2003Moira Ltd.Method and apparatus to clean air
US6758884 *Aug 7, 2002Jul 6, 20043M Innovative Properties CompanyAir filtration system using point ionization sources
US6807044May 1, 2003Oct 19, 2004Ion Systems, Inc.Corona discharge apparatus and method of manufacture
US6989050 *Jan 29, 2002Jan 24, 2006Alexandr Akhatovich GaneevDevice for accumulating aerosols from gases
US7052531 *Mar 31, 2003May 30, 2006Takashi KishiokaLocal cleaning system for constructing clean shielded space with no need for dedicated partition wall, using charged air shower unit providing ion wind and local exhaust device
US7101424 *Jan 28, 2005Sep 5, 2006Forschungszentrum Karlsruhe GmbhIonizer and use thereof in an exhaust gas purifying system for moisture-laden gases
US7105041 *Jun 21, 2004Sep 12, 2006Dunn John PGrid type electrostatic separator/collector and method of using same
US7105042 *Jan 18, 2005Sep 12, 2006Mann & Hummel GmbhApparatus for separating aerosols or particles from gases
US7141098Jan 22, 2004Nov 28, 20063M Innovative Properties CompanyAir filtration system using point ionization sources
US7318856 *Dec 3, 2004Jan 15, 2008Sharper Image CorporationAir treatment apparatus having an electrode extending along an axis which is substantially perpendicular to an air flow path
US7435288 *Dec 29, 2006Oct 14, 2008Hyundai Motor CompanySystem for filtering particulate matter of diesel particulate filter
US7465340 *Nov 29, 2006Dec 16, 2008Smc CorporationIonizer with parts-extension unit
US7497898 *Oct 23, 2007Mar 3, 2009Smc CorporationIonizer
US7537647 *May 30, 2006May 26, 2009S.C. Johnson & Son, Inc.Air purifier
US7553354 *Nov 12, 2004Jun 30, 2009Absalut Ecology EstablishmentApparatus and method for reducing and removing airborne oxidized particulates
US7585352Apr 28, 2006Sep 8, 2009Dunn John PGrid electrostatic precipitator/filter for diesel engine exhaust removal
US7695552 *Jan 16, 2008Apr 13, 2010Smc CorporationIonizer
US7708803 *Nov 3, 2006May 4, 2010Electric Power Research Institute, Inc.Method and apparatus for the enhanced removal of aerosols from a gas stream
US7731781 *Sep 14, 2007Jun 8, 2010Electric Power Research Institute, Inc.Method and apparatus for the enhanced removal of aerosols and vapor phase contaminants from a gas stream
US7793506Aug 11, 2006Sep 14, 2010Wyle Laboratories, Inc.Emission controlled engine exhaust static test stand
US8029600Nov 3, 2006Oct 4, 2011Electric Power Research Institute, Inc.Sorbent filter for the removal of vapor phase contaminants
US8038775 *Feb 4, 2011Oct 18, 2011Peter GefterSeparating contaminants from gas ions in corona discharge ionizing bars
US8048200 *Apr 23, 2010Nov 1, 2011Peter GefterClean corona gas ionization for static charge neutralization
US8143591Oct 22, 2010Mar 27, 2012Peter GefterCovering wide areas with ionized gas streams
US8167985Oct 26, 2011May 1, 2012Peter GefterClean corona gas ionization for static charge neutralization
US8206494 *Jul 24, 2006Jun 26, 2012CnrsDevice for air/water extraction by semi-humid electrostatic collection and method using same
US8241398 *Apr 22, 2010Aug 14, 2012Electric Power Research Institute, Inc.Method and apparatus for the enhanced removal of aerosols and vapor phase contaminants from a gas stream
US8416552Oct 20, 2010Apr 9, 2013Illinois Tool Works Inc.Self-balancing ionized gas streams
US8425657 *Dec 17, 2008Apr 23, 2013Technische Universiteit DelftUse of an electric field for the removal of droplets in a gaseous fluid
US8460433Apr 14, 2012Jun 11, 2013Illinois Tool Works Inc.Clean corona gas ionization
US8663373 *May 7, 2010Mar 4, 2014Xiang GaoFree radical injection ionizer for flue gas treatment with corona discharge
US8693161Dec 30, 2012Apr 8, 2014Illinois Tool Works Inc.In-line corona-based gas flow ionizer
US8717733Dec 30, 2012May 6, 2014Illinois Tool Works Inc.Control of corona discharge static neutralizer
US8883103 *Jan 16, 2014Nov 11, 2014Denso International America, Inc.Catalytic converter for treating ionized exhaust
US20100326274 *Dec 17, 2008Dec 30, 2010Technische Universiteit DelftUse of an electric field for the removal of droplets in a gaseous fluid
US20110296996 *May 7, 2010Dec 8, 2011Xiang GaoFree radical injection ionizer for flue gas treatment with corona discharge
EP0899014A1 *Feb 27, 1998Mar 3, 1999Galaxy Yugen KaishaElectrostatic precipitator and incinerator
EP1614971A2 *Dec 30, 2004Jan 11, 2006Lg Electronics Inc.Air purifier
WO2004018107A1 *Jul 29, 2003Mar 4, 2004Dunn JohnGrid type electrostatic separator/collector and method of using same
Classifications
U.S. Classification60/275, 60/297, 96/97, 96/55, 55/DIG.300
International ClassificationF02B1/04, F01N3/01, B03C3/38, F01N3/08
Cooperative ClassificationF01N3/0892, Y02T10/20, B03C3/38, F01N3/01, F02B1/04, Y10S55/30
European ClassificationF01N3/08C, F01N3/01, B03C3/38
Legal Events
DateCodeEventDescription
Jun 5, 1987ASAssignment
Owner name: CUMMING CORPORATION, 9620 TOPANGA CANYON PLACE, CH
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CONSAN PACIFIC INCORPORATED;REEL/FRAME:004727/0398
Effective date: 19860804
Owner name: CUMMING CORPORATION, A CA. CORP.,CALIFORNIA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CONSAN PACIFIC INCORPORATED;REEL/FRAME:004727/0398