|Publication number||US3779182 A|
|Publication date||Dec 18, 1973|
|Filing date||Aug 24, 1972|
|Priority date||Aug 24, 1972|
|Publication number||US 3779182 A, US 3779182A, US-A-3779182, US3779182 A, US3779182A|
|Original Assignee||Camacho S|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (5), Referenced by (116), Classifications (27), Legal Events (7)|
|External Links: USPTO, USPTO Assignment, Espacenet|
O Umted States Patent [1 1 [111 3,779,182
Camacho 1 Dec. 18, 1973 REFUSE CONVERTING METHOD AND 3,173,388 3/1965 Menrath et a1 110/8 E APPARATUS UTILIZING LONG ARC 3,503,347 3/1970 Marr, Jr et al..... 110/8 R 3,404,078 10/1968 Goldberger 219/121 P COLUMN FORMING PLASMA TORCHES 3.290.552 12/1966 Van Ornum 219/75 Salvador L. Camacho, ONeal Rd, Raleigh, NC. 27602 Filed: Aug. 24, 1972 Appl. No; 283,516
US. Cl 110/8 R, llO/l8 E, 110/8 E, 219/121, 219/75 Int. Cl. F23g 5/12 Field of Search 110/8 R, 8 E, 18 C, 1 10/8 C, 18 E; 219/12], 72-75, 383
References Cited UNITED STATES PATENTS 11/1970 Zanft 110/8 R Primary Examinerl(enneth W. Sprague Assistant Examiner-Henry C. Yuen Ar!0rne vB. B. Olive  ABSTRACT A method and apparatus are disclosed which are based on utilizing a plural number of long are column forming plasma torches in combination with a refractory lined furnace chamber to continuously pyrolyze household and industrial refuse material fed into the chamber and convert the same to usable materials and useful forms of energy.
10 Claims, 4 Drawing Figures REFUSE CONVERTING METHOD AND APPARATUS UTILIZING LONG ARC COLUMN FORMING PLASMA TORCI-IES CROSS-REFERENCE TO RELATED APPLICATIONS This invention is related to copending application, Serial No. 283,552, entilted Trough Hearth Construction And Method For Plasma Arc Furnace, which discloses an electric circuit for initiating and sustaining long arc plasma columns utilizing long are column forming plasma generators or torches of the type previously taught in U.S. Pat. No. 3,673,375, entitled Long Arc Column Plasma Generator and Method," issued to the same inventor.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to methods and apparatus for. reducing the physical weight and volume of refuse by'subjecting it to direct radiated. and convected heat from a long plasma arc column.
2. Description of the Prior Art 7 Pyrolysis (or destructive distillation) techniques were until very recently unrecognized 'as a means for. converting'municipal and industrial refuse into useful solid, liquid and gaseous products. In the past, conventional incinerators have been widely used to reduce refuse to ash through combustion. This process necessarily introduced fly. ash and many other types of airborne pollutants into the' atmosphere, due to the tremendous amounts of air utilized to effect combustion. vAs an alternate measure, sanitary landfills were developed to prevent air pollution. It is now recognized, however, that water leaching through such landfills may constitute a pollutant to ground water. It is a well-known and documented fact that refuse contains both combustible and non-combustible materials. The University of California, as a result of a study analyzing municipal refuse, has stated that the composition of municipal mixed" (unsegregated) refuse by weight is: cans, 9.8 percent, bottles and glass, 1 1.7 percent; metals (other than cans) 0.9 percent; other 77.6 percent. (See University of California Technical Bulletin No. 9, Sanitary Engineering Laboratory 1973 American Public Works Association, ."Municipal Refuse Disposal). It is also a well-known fact that the non-combustible portion which approximates 25 percentof the total weight of refuse is never appreciably reduced by either conventional incineration or landfill practices. Typically, these items are either shredded and buried at the landfill or are simply heaped near the incinerator.
In its I970 study entitled Conversion of Municipal and Industrial Refuse into Useful Materials by Pyrolysis, the United States Department of the Interior, Bureau of Mines, revealed the usefulness of pyrolyzing refuse and obtaining usable solid, liquid, and gaseous products. In this study, various samples of shredded municipal and industrial refuse with the metallic component largely removed were placed in a sealed retort and subjected to various levels of conducted heat to as much as 900 centigrade. Among the resulting products were solid residue (a source of charcoal briquettes and filter medium), propane, ethylene and methane gas, solid ammonium sulphate, tar, light oil (a soure of benzene and toluene) and liquor 95 percent water and the remainder formed of acids, ketones and aldehydes). In
terms of recoverable heat energy, the products of pyrolysis of refuse produced more than a sufficient Btu content to provide the heat for pyrolysis. (See W. S. Sanner et al.: Conversion of Municipal and Industrial Refuse into Useful Materials by Pyrolysis," Report of Investigations No. 7428, U.S. Department of the Interior, Bureau of Mines, August, 1970.)
Although the study conducted by the Bureau of Mines was instrumental in determining the potential value of converting refuse into usable products by pyrolysis, it did not suggest an efficient method and apparatus to do so. The system used was based upon a batch method of charging the retort and did not suggest a method and apparatus for more efficient continuousoperation. Furthermore, the solid residue contained bottle caps and bits of metal which required further separation before the solid residue could be utilized. In addition, the bulk of the metallic refuse component was required tobe segregated from the combustible or carbonaceous component prior to pyrolysis, and the combustible component required drying and shredding. for maximum efficiency of the process.
Additional prior art has suggested the use of conventional arc-forming electrodes. in an incinerator in U.S. Pat. No. 3,503,347 to intermittantly generate heat and thereby reduce the volume and weight of waste confined inside the incinerator. The above patent does not, however, teach the continuous operation of such an incinerator and does not teach a practical application of the evolved noxious gases. In general, the prior art has not suggested an efficient method and apparatus utilizing long arc column plasma torches for reducing substantially large amounts of unsegregated refuse to usable and valuable products from which energy may be readily obtained, while at the same time not polluting the environment. Furthermore, the prior art has not suggested such a method and apparatus which would be adapted for continuous rather than batch operation and capable of reducing the physical weight and volume of substantially large amounts of refuse while generating more energy than being consumed.
SUMMARY OF THE INVENTION This invention utilizes a plurality of long are column forming plasma torches in combination with a furnace chamber to thermally decompose unsegregated refuse into a gaseous and molten fluid state. Conveyor means are adapted to continuously supply refuse to the furnace chamber while smoke recycling means are adapted to prevent the gases being produced within the chamber from escaping. The furnace chamber is formed so as to have a somewhat bowl-shaped refractor lined interior hearth portion into which the long are forming plasma torches are directed. The hearth portion further includes a normally electrically disconnected graphite electrode but which may be appropriately connected into the electrical circuit when needed as an electrode. A lip formed along one edge of the refractory material provides a fluid outlet for the molten refuse. Pyrolysis of the refuse proceeds as long are plasmas are generated between the various torches residing in vertical wall portions of the furnace chamber, and molten metallic portions of the refuse collects in the hearth. The heat radiated and convected from the generated long are plasma columns is sufficient to reduce the remaining organic and non-combustible portion of the refuse to either a molten or gaseous state. Some of the evolved gases rise, preheat the refuse and are then reintroduced into the reduction process. In a preferred embodiment as the molten refuse reaches the level of the outlet lip it is oxidized by an incoming stream of gas, e.g., air. The oxidized molten refuse then enters a water bath which effectively provides a water seal and forms into a solid slag for later recovery by appropriate handling means. In some instances the slag may be maintained heated for purposes of molding the same. The gaseous products of the pyrolyzed refuse are simultaneously converted into saturated steam and other gases which may beneutralized or combusted by introduction of gases other than thementioned air. The hot gases may then drive appropriate energy conversion means such as a turbine generator and may be scrubbed or otherwise purified before being released to the atomosphere.
DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross sectional side view ofa typical refuse converting apparatus according to the invention.
FIG. 2 is a cutaway side view of a long arc column forming plasma torch employed in the instant invention generally shown in operating position inside a furnace chamber.
FIG. 3 is a top plan view of a refuse converting apparatus according to the invention.
FIG. 4 is a somewhat schematic diagram of an electrical circuit employed in the instant invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIG. 1, as previously mentioned, the present invention is directed to an apparatus and method for continuously reducing by pyrolysis the physical weight and volume of municipal and industrial refuse material and converting it into energy, recoverable and useful products, utilizing long are column plasma generators, also known in the art as plasma torches. In a preferred embodiment, a complete refuse converting apparatus includes a furnace chamber a plurality of directionally stable long arc column forming plasma torches, generally designated 12, of the type disclosed in previously referred to US. Pat. No. 3,673,375, projecting through selected apertures 11 in vertical walls 14 of said furnace chamber 15. Also included is a somewhat concave refractory lined furnace hearth 17 having an integrally formed graphite electrode 18. Said refuse converting apparatus is also provided with a refuse hopper 20 including sealed refuse conveying means 21 and smoke recovery means 23, together being adapted to continuously feed refuse materials into said furnace chamber 15, while maintaining smoke and noxious gases within the chamber. The term refuse as used in this disclosure includes raw unsegregated refuse of a municipal or industrial nature or any mixture of both. By unsegregated" what is meant is that organic wastes are mixed with tin cans, bottles, paper, etc.
In accordance with the instant invention during operation, later described in greater detail, each plasma torch 12 is adapted to form a transferred long arc column of from 10 to inches with molten refuse material 19 a portion of which is metallic. Due to the intense heat being generated (1,000 to 2,000K), the nonmolten refuse (represented by dashed lines 22) is rapidly pyrolyzed into gaseous and molten fluid components in the absence, at this point, of appreciable combustion.
Hot gases and molten refuse evolved from the heat of the arc columns flow past a lip 16 formed in the concave refractory lined hearth 17 and into an oxidation chamber 30 which includes a gas inlet manifold 31 for oxygen or air which enables the evolved gases to be combusted into an oxidation dioxide and steam vapor. Depending on the nature of the refuse gases produced, gases other than air or oxygen may be introduced to combust or neutralize such refuse gases. Gas vent 32 receives the hot combusted vapor while a water bath 33 receives the molten residue and reduces it into a solidified slag material 38. The solidified slag aggregate is a highly salable item due to its silica and metallic content. A ridge of molded refractory material 34 adjacent lip 16 further enhances combustion and further degradation of the molten refuse by increasing the surface area over which the refuse is exposed to oxidation. The action of the water seal with the molten refuse serves to generate additional steam. A turbine generator 35, for example, may receive the hot gases entering gas vent 32 and be used to generate more electrical power than is consumed by the torches. Appropriate gas treatment means (not shown) receive and scrub the combusted gases until safe for release to atmosphere. Alternately, selected valuable gases, e.g., methane, may be separated by well-known means before being combusted by withdrawing a portion of the gas by appropriate means (not shown). The now solidified slag 38 may be handled by appropriate blade or other suitable conveyor means 60 and finally withdrawn from the water bath by additional handling apparatus 61 for later use.
Referring to FIG. 2, a long arc column plasma torch, according to the invention and as previously taught in US. Pat. No. 3,673,375, is defined as being an apparatus and an electrical conductor in the arc circuit and includes a cylindrical shaped electrode 36, a gas directing nozzle 37 axially aligned with, forwardly spaced and insulated from electrode 36, and appropriate gas and electrical supply means (not shown). As previously disclosed in copending application, Ser. No. 283,552 a pilot are indicated by dashed lines 45, may be struck between electrode 36 and nozzle 37 by introducing a current potential therebetween while simultaneously applying a vortical flow of gas directed outward through said nozzle 37. Such a pilot arc is readily trans ferred to a metallic material 46 also in the electrical circuit when such pilot are 45 becomes proximate said metallic matter (i.e., 4-7 inches) by appropriately advancing said torch 12 into a position proximate said metallic refuse 46. In the instant invention, it has been recognized that such a long are column plasma torch has particular effectiveness in a refuse converting apparatus since one component (typically 25 percent) of refuse is metal.
Referring now to FIG. 3, a first long arc column plasma torch 40, in preferred form, is adapted to extend through an aperture 47 in a portion of a rear wall 51 of said furnace chamber 15 while second 41 and third 42 long are column plasma torches are adapted to extend through apertures 48, 49 in adjacent corner wall portions 52 of said furnance chamber. As is perhaps apparent, many other torch mounting configurations will appear to those skilled in the art, and the particular mounting details described herein are for purposes of example only. A sleeve or collar 53 (FIG. 2) which may be stainless steel, for example, lining each respective aperture 47, 48, 49 is adapted to enable horizontal and vertical angular, as well as axial, movement of each plasma torch within its respective mounting position while preventing heat and noxious gases from escaping through apertures 47, 48, 49. Remotely controllable torch positioning means 24 (FIG. 1) are provided to enable accurate positioning of the plasma torches.
Referring now to FIG. 4, 'as previously mentioned, each long arccolumn forming plasma torch utilized in the present invention (shown in cross section) includes a cylindrical shaped internal electrode 36 and a gas directing nozzle 37 axially aligned with, forwardly spaced and insulated from electrode and appropriate gas, water and electrical supply means (not shown). while the last mentioned gas and water supply means areconsidered well-establishedin the art requiring no further elaboration herein, a better understanding may be gained of the invention by a discussion'of its advantageous use of power in starting and maintaining the various long arc plasma columns. Utilizing a three phase A. C. wye 55 having a floating neutral 56 to conveniently supply power to three long arc column forming plasma torches 12, a given torch internal electrode 36 is connected to an individual current phase. It is apparent that if more than three torches are employed, a greater number of phases may be utilized. Each torch nozzle 37 is connected to an adjacent phase 58 via an appropriate .choke 59. In this manner, apilot arc 45 may be struck between the nozzle 37 and internal electrode 36 of each torch without introducing a consumable electrical conductor by applying the phase to adjacent phase voltage differential, caused byvchoke 59, across internal electrode 36 and nozzle 37 and by simultaneously introducing a gas vortical flow through nozzle 37. The current passing through the pilot arc 45- is substantially smaller than that of the main arc 13 (see FIGS. 1 and 2) which is subsequently adapted to be transferred to the metal scrap to be melted. Simultaneous transferral of at least two pilot arcs 45 to the metallic refuse component establishes at least two main transferred arcs (not shown) and completes a phase 57 to adjacent phase 58 loop whereby the full available current is now utilized.
Since the nature and physical arrangement of the refuse with respect to the torches willvary widely during operation it is contemplated that one or more torches may become inoperable. For example, a falling porcelain coated refrigerator or a sudden deluge of rotten vegetables may stifle an are. In this event, any single torch may be operated phase to neutral and a new plasma column path may be established by restarting with a pilot arc. Thus, when contact with an electrically conductive melt or an electrically conductive unmelted refuse is lost to a particular plasma column connection may be made to graphite electrode 18 to a ground or neutral 79 (FIG. 1) by a suitable manual or remotely operated contactor 78. Once a molten metallic pool is reestablished the other torches may be again utilized.
Once a molten pool 19 of metallic refuse has been formed and preferably all long arc plasma columns 13 have made electrical contact with said molten pool, it is possible to then continuously dump unsegregated refuse 25 into the furnace chamber 15. The small molten metallic component of the unsegregated refuse will then be sufficient to sustain electrical connection between the three plasma arcs. Furthermore, the above described method of operating long are column plasma torches in electrical connection with a molten pool of metallic refuse 19 assures continuous operation of the furnace since the metal having a higher specific gravity than the bulk of other refuse will tend to remain. in the concave refractory lined hearth 17 while the continuously melting mixed metallic-non-metallic refuse will tend to flow out of the concave furnace hearth. 17, pass the outlet lip 16 through oxidation chamber 30and into water bath 33. It is also a recognized. advantage of the particular embodiment shown to utilize the hot gases being evolved in the furnace chamber to pre-heat refuse materials 25 entering the furnace thereby promoting even greater efficiences. Based on the foregoing invention operation parameters, the specific furnace design and construction is deemed well within the established electric arc furnace art and therefore requires no further elaboration here. While specific refuse conveying means, material handling and energy recovery means have been suggested, these aspects of the instant invention are also well-known in the established art. A- complete but not definitive method of converting refuse into usable energy recoverable products based on the described invention may include:
a. initially charging a furnace built in accordance with the invention with refuse having a high metallic content;
b. initiating and sustaining a plurality of long are plasma columns and reducing the largely metallic refuse to a molten pool;
c. conveying refuse of any class or mixture into the furnace;
d. reducing by heat pyrolysis the physical weight and volume of said conveyed refuse into molten fluid and gaseous products;
e. converting the evolved molten fluid and gaseous products to usable energy;
f. treating and purifying the final products before returning them to the atmosphere.
On the basis of the foregoing description, it is apparent that the instant invention provides an efficient and environmentally safe alternative to landfill, and combustive incineration practices of refuse disposal while at the same time providing a source for energy through the use of long are column forming plasma torches. According to the invention, it is now possible to continuously decrease the physical weight and volume of raw unsegregated refuse while converting the evolved products to useful materials and useful energy.
What is claimed is:
1. An apparatus for reducing by pyrolysis raw unsegregated refuse comprising:
a. a furnace chamber;
b. a refractory lined hearth in said furnace chamber;
c. conveyor means adapted to introduce raw unsegregated refuse, at least a portion of which is metallic, into said furnace chamber; and
d. long arc column forming plasma generator means mounted in said chamber and adapted to initiate and sustain at least one long arc column plasma having a portion thereof in electrical contact with said refuse and being adapted to reduce said refuse to gaseous and molten fluid products by utilization of the column heat.
2. The apparatus of claim 1 including gas supply means adapted to contact and chemically react with said gaseous and molten fluid products.
3. The apparatus of claim 2 including energy conversion means adapted to recover energy from said products.
4. The apparatus of claim 2 wherein said gas supply means comprises an oxidizing supply.
5. The apparatus of claim 1 wherein said generator means comprises a plurality of peripherally spacedgenerators and including electrical circuit means adapted to initiate a pilot arc in each said generator and enabling a main long are column to be transferred between at least two said generators and said refuse.
6. The apparatus of claim 1 including groundable electrode means included in said hearth and being adapted to enable a long are plasma column to be generated between at least one said generator and said grounded electrode.
7. A method for reducing by pyrolysis a volume of raw unsegregated refuse comprising:
a. initially charging a furnace chamber with refuse materials of which a substantial portion is metallic;
b. providing long plasma arc column generation means extending through at least one wall portionof said furnace chamber;
c. establishing and maintaining at least one long plasma arc column between said generation means and said refuse thereby reducing by heat at least said metallic refuse portion to amolten state;
d. conveying additional raw unsegregated refuse into said furnace chamber; and
e. pyrolyzing all of said raw unsegregated refuse by heat from said long plasma arc column into molten and gaseous products.
8. The method of claim 7 including chemically reacting a selected gas with said molten and gaseous products.
9. The method of claim 8 wherein said gas comprises an oxidizing gas.
10. The method of claim 7 including the step of recovering energy from said products.
5 3 i UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3, 779,13?- Dated December 18, 1973 InventorGQ Salvador L. Camacho It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:
Column 1, line 66, a parenthesis mark should be inserted before "95 percent".
Column 4, line 8, "an oxidation" should be deleted before "dioside" and -carbon should be inserted.
Signed and sealed this 17th day of December 1974.
McCOY M. GIBSON JR. C. MARSHALL DANN Attesting Officer Commissioner of Patents
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US3173388 *||Oct 8, 1962||Mar 16, 1965||Ernest J Lideen||Carbon arc incinerator|
|US3290552 *||Apr 21, 1964||Dec 6, 1966||Giannini Scient Corp||Apparatus for generating high-intensity light with high temperature particulate material|
|US3404078 *||May 25, 1965||Oct 1, 1968||Battelle Development Corp||Method of generating a plasma arc with a fluidized bed as one electrode|
|US3503347 *||May 26, 1967||Mar 31, 1970||Electrode Incinerators Inc||Method and electrical arc apparatus for incinerating trash and garbage|
|US3537410 *||Sep 20, 1968||Nov 3, 1970||Hagan Ind Inc||Incinerator with residue reduction|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3944412 *||Sep 18, 1974||Mar 16, 1976||Hsin Liu||Method for recovering metals|
|US4141694 *||Dec 27, 1977||Feb 27, 1979||Technology Application Services Corporation||Apparatus for the gasification of carbonaceous matter by plasma arc pyrolysis|
|US4181504 *||Aug 26, 1977||Jan 1, 1980||Technology Application Services Corp.||Method for the gasification of carbonaceous matter by plasma arc pyrolysis|
|US4217479 *||Apr 6, 1978||Aug 12, 1980||Swiss Aluminium Ltd.||High temperature reactor|
|US4220843 *||Sep 27, 1978||Sep 2, 1980||Swiss Aluminium Ltd.||Process for melting material|
|US4326842 *||Jan 24, 1980||Apr 27, 1982||Daidotokushuko Kabushikikaisha||Device for the pulverization of radioactive wastes|
|US4432942 *||Oct 13, 1981||Feb 21, 1984||Toshio Adachi||Apparatus for filling a container with radioactive solid wastes|
|US4466807 *||Nov 25, 1981||Aug 21, 1984||Skf Steel Engineering Aktiebolag||Manufacture of a gas containing monoxide and hydrogen gas from a starting material containing carbon and/or hydrocarbon|
|US4626654 *||Sep 29, 1982||Dec 2, 1986||Veb Edelstahlwerk "8 Mai 1945" Freital||Metallurgical plasma melting process|
|US4734551 *||Jan 10, 1986||Mar 29, 1988||Plasma Energy Corporation||Method and apparatus for heating molten steel utilizing a plasma arc torch|
|US4770109 *||May 4, 1987||Sep 13, 1988||Retech, Inc.||Apparatus and method for high temperature disposal of hazardous waste materials|
|US4861001 *||Jul 21, 1987||Aug 29, 1989||Retech, Inc.||Melting retort and method of melting materials|
|US4918282 *||Oct 23, 1987||Apr 17, 1990||Plasma Energy Corporation||Method and apparatus for heating molten steel utilizing a plasma arc torch|
|US5005494 *||Aug 16, 1989||Apr 9, 1991||Retech, Inc.||Apparatus and method for high temperature disposal of hazardous waste materials|
|US5143000 *||May 13, 1991||Sep 1, 1992||Plasma Energy Corporation||Refuse converting apparatus using a plasma torch|
|US5224118 *||Jul 27, 1992||Jun 29, 1993||Murry Vance||On-site, biohazardous waste disposal system|
|US5333146 *||Jun 28, 1993||Jul 26, 1994||Murry Vance||On-site, biohazardous waste disposal system|
|US5405429 *||May 12, 1993||Apr 11, 1995||Holderbank Financiere Glarus, Ag||Method for treatment and conversion of refuse incineration residues into environmentally acceptable and reusable material, especially for construction purposes|
|US5408494 *||Jul 28, 1993||Apr 18, 1995||Retech, Inc.||Material melting and incinerating reactor with improved cooling and electrical conduction|
|US5451738 *||May 25, 1993||Sep 19, 1995||Itex Enterprises Services, Inc.||Plasma arc decomposition of hazardous wastes into vitrified solids and non-hazardous gasses|
|US5534659 *||Apr 18, 1994||Jul 9, 1996||Plasma Energy Applied Technology Incorporated||Apparatus and method for treating hazardous waste|
|US5666891 *||Feb 2, 1995||Sep 16, 1997||Battelle Memorial Institute||ARC plasma-melter electro conversion system for waste treatment and resource recovery|
|US5675056 *||Mar 9, 1995||Oct 7, 1997||Vance; Murray A.||Incandescent waste disposal system and method|
|US5756957 *||Mar 25, 1996||May 26, 1998||Integrated Environmental Technologies, Llc||Tunable molten oxide pool assisted plasma-melter vitrification systems|
|US5798497 *||Jun 19, 1995||Aug 25, 1998||Battelle Memorial Institute||Tunable, self-powered integrated arc plasma-melter vitrification system for waste treatment and resource recovery|
|US5811752 *||Mar 25, 1996||Sep 22, 1998||Integrated Environmental Technologies, Llc||Enhanced tunable plasma-melter vitrification systems|
|US5833933 *||Oct 1, 1997||Nov 10, 1998||Vance; Murry A.||Incandescent waste disposal system and method|
|US5908564 *||Aug 14, 1997||Jun 1, 1999||Battelle Memorial Institute||Tunable, self-powered arc plasma-melter electro conversion system for waste treatment and resource recovery|
|US6018471 *||Mar 16, 1998||Jan 25, 2000||Integrated Environmental Technologies||Methods and apparatus for treating waste|
|US6037560 *||Sep 22, 1998||Mar 14, 2000||Integrated Environmental Technologies, Llc||Enhanced tunable plasma-melter vitrification systems|
|US6066825 *||Dec 8, 1998||May 23, 2000||Integrated Environmental Technologies, Llc||Methods and apparatus for low NOx emissions during the production of electricity from waste treatment systems|
|US6127645 *||Aug 24, 1998||Oct 3, 2000||Battelle Memorial Institute||Tunable, self-powered arc plasma-melter electro conversion system for waste treatment and resource recovery|
|US6160238 *||May 21, 1998||Dec 12, 2000||Integrated Environmental Technologies, Inc.||Tunable molten oxide pool assisted plasma-melter vitrification systems|
|US6215678||Sep 9, 1999||Apr 10, 2001||Integrated Environmental Technologies, Llc||Arc plasma-joule heated melter system for waste treatment and resource recovery|
|US6514469||Sep 22, 2000||Feb 4, 2003||Yuji Kado||Ruggedized methods and systems for processing hazardous waste|
|US6551563||Sep 22, 2000||Apr 22, 2003||Vanguard Research, Inc.||Methods and systems for safely processing hazardous waste|
|US6630113||Sep 9, 1999||Oct 7, 2003||Integrated Environmental Technologies, Llc||Methods and apparatus for treating waste|
|US6702991||Nov 12, 2002||Mar 9, 2004||Arvin Technologies, Inc.||Apparatus and method for reducing power consumption of a plasma fuel reformer|
|US6715452||Nov 13, 2002||Apr 6, 2004||Arvin Technologies, Inc.||Method and apparatus for shutting down a fuel reformer|
|US6758035||Sep 18, 2002||Jul 6, 2004||Arvin Technologies, Inc.||Method and apparatus for purging SOX from a NOX trap|
|US6843054||Jan 16, 2003||Jan 18, 2005||Arvin Technologies, Inc.||Method and apparatus for removing NOx and soot from engine exhaust gas|
|US6851398||Feb 13, 2003||Feb 8, 2005||Arvin Technologies, Inc.||Method and apparatus for controlling a fuel reformer by use of existing vehicle control signals|
|US6959542||Jul 28, 2003||Nov 1, 2005||Arvin Technologies, Inc.||Apparatus and method for operating a fuel reformer to regenerate a DPNR device|
|US6971323||Apr 8, 2004||Dec 6, 2005||Peat International, Inc.||Method and apparatus for treating waste|
|US6976353||Sep 18, 2002||Dec 20, 2005||Arvin Technologies, Inc.||Apparatus and method for operating a fuel reformer to provide reformate gas to both a fuel cell and an emission abatement device|
|US7021048||Sep 18, 2002||Apr 4, 2006||Arvin Technologies, Inc.||Combination emission abatement assembly and method of operating the same|
|US7216593||Nov 12, 2005||May 15, 2007||Peat International, Inc.||Apparatus for treating liquid waste|
|US7244281||Oct 24, 2003||Jul 17, 2007||Arvin Technologies, Inc.||Method and apparatus for trapping and purging soot from a fuel reformer|
|US7285247||Oct 24, 2003||Oct 23, 2007||Arvin Technologies, Inc.||Apparatus and method for operating a fuel reformer so as to purge soot therefrom|
|US7698887||Jun 17, 2005||Apr 20, 2010||Emcon Technologies Llc||Method and apparatus for determining local emissions loading of emissions trap|
|US7776280||May 10, 2005||Aug 17, 2010||Emcon Technologies Llc||Method and apparatus for selective catalytic reduction of NOx|
|US7832344||Nov 16, 2010||Peat International, Inc.||Method and apparatus of treating waste|
|US8156876||Jun 23, 2006||Apr 17, 2012||Georgia Tech Research Corporation||Systems and methods for integrated plasma processing of waste|
|US8252244||Feb 3, 2009||Aug 28, 2012||Peat International, Inc.||Method and apparatus of treating waste|
|US8306665||Nov 6, 2012||Plasco Energy Group Inc.||Control system for the conversion of carbonaceous feedstock into gas|
|US8307770||Mar 12, 2007||Nov 13, 2012||Pyropure Limited||Waste treatment apparatus and method|
|US8372169||May 7, 2007||Feb 12, 2013||Plasco Energy Group Inc.||Low temperature gasification facility with a horizontally oriented gasifier|
|US8435315||May 7, 2007||May 7, 2013||Plasco Energy Group Inc.||Horizontally-oriented gasifier with lateral transfer system|
|US8671855||Jun 29, 2010||Mar 18, 2014||Peat International, Inc.||Apparatus for treating waste|
|US8690975||Feb 27, 2008||Apr 8, 2014||Plasco Energy Group Inc.||Gasification system with processed feedstock/char conversion and gas reformulation|
|US9109172||Dec 19, 2012||Aug 18, 2015||Plasco Energy Group Inc.||Low temperature gasification facility with a horizontally oriented gasifier|
|US9222026||Mar 14, 2013||Dec 29, 2015||Alter Nrg Corp.||Plasma gasification reactors with modified carbon beds and reduced coke requirements|
|US9321640||Feb 6, 2014||Apr 26, 2016||Plasco Energy Group Inc.||Gasification system with processed feedstock/char conversion and gas reformulation|
|US20030047146 *||Sep 10, 2001||Mar 13, 2003||Daniel Michael J.||Plasmatron-internal combustion engine system having an independent electrical power source|
|US20030047147 *||Sep 4, 2002||Mar 13, 2003||Daniel Michael J.||Plasmatron-internal combustion engine system having an independent electrical power source|
|US20030140622 *||Sep 18, 2002||Jul 31, 2003||William Taylor||Combination emission abatement assembly and method of operating the same|
|US20030143442 *||Sep 18, 2002||Jul 31, 2003||Daniel Michael J.||Apparatus and method for operating a fuel reformer to generate multiple reformate gases|
|US20030143445 *||Sep 18, 2002||Jul 31, 2003||Daniel Michael J.||Apparatus and method for operating a fuel reformer to provide reformate gas to both a fuel cell and an emission abatement device|
|US20030196611 *||Apr 23, 2002||Oct 23, 2003||Daniel Michael J.||Plasmatron having an air jacket and method for operating the same|
|US20030200742 *||Apr 18, 2003||Oct 30, 2003||Smaling Rudolf M.||Apparatus and method for regenerating a particulate filter of an exhaust system of an internal combustion engine|
|US20040020188 *||Jul 2, 2003||Feb 5, 2004||Kramer Dennis A.||Method and apparatus for generating pressurized air by use of reformate gas from a fuel reformer|
|US20040020191 *||Jul 2, 2003||Feb 5, 2004||Kramer Dennis A.||Method and apparatus for advancing air into a fuel reformer by use of a turbocharger|
|US20040020447 *||Jul 2, 2003||Feb 5, 2004||William Taylor||Method and apparatus for advancing air into a fuel reformer by use of an engine vacuum|
|US20040028964 *||Aug 4, 2003||Feb 12, 2004||Smaling Rudolf M.||Apparatus and method for controlling the oxygen-to-carbon ratio of a fuel reformer|
|US20040050035 *||Sep 18, 2002||Mar 18, 2004||Smaling Rudolf M.||Method and apparatus for purging SOx from NOx trap|
|US20040050345 *||Sep 17, 2002||Mar 18, 2004||Bauer Shawn D.||Fuel reformer control system and method|
|US20040052693 *||Sep 18, 2002||Mar 18, 2004||Crane Samuel N.||Apparatus and method for removing NOx from the exhaust gas of an internal combustion engine|
|US20040107987 *||Dec 6, 2002||Jun 10, 2004||Ciray Mehmet S.||Thermoelectric device for use with fuel reformer and associated method|
|US20040139729 *||Jan 16, 2003||Jul 22, 2004||William Taylor||Method and apparatus for removing NOx and soot from engine exhaust gas|
|US20040139730 *||Jan 16, 2003||Jul 22, 2004||William Taylor||Method and apparatus for directing exhaust gas and reductant fluid in an emission abatement system|
|US20040144030 *||Jan 23, 2003||Jul 29, 2004||Smaling Rudolf M.||Torch ignited partial oxidation fuel reformer and method of operating the same|
|US20040159289 *||Feb 13, 2003||Aug 19, 2004||William Taylor||Method and apparatus for controlling a fuel reformer by use of existing vehicle control signals|
|US20040216378 *||Apr 29, 2003||Nov 4, 2004||Smaling Rudolf M||Plasma fuel reformer having a shaped catalytic substrate positioned in the reaction chamber thereof and method for operating the same|
|US20050070751 *||Sep 27, 2003||Mar 31, 2005||Capote Jose A||Method and apparatus for treating liquid waste|
|US20050072140 *||Jul 28, 2003||Apr 7, 2005||William Taylor||Apparatus and method for operating a fuel reformer to regenerate a DPNR device|
|US20050086865 *||Oct 24, 2003||Apr 28, 2005||Crane Samuel N.Jr.||Method and apparatus for trapping and purging soot from a fuel reformer|
|US20050087436 *||Oct 24, 2003||Apr 28, 2005||Smaling Rudolf M.||Apparatus and method for operating a fuel reformer so as to purge soot therefrom|
|US20060065172 *||Nov 12, 2005||Mar 30, 2006||Peat International, Inc.||Method and apparatus for treating waste|
|US20060283176 *||Jun 17, 2005||Dec 21, 2006||Arvinmeritor Emissions Technologies Gmbh||Method and apparatus for regenerating a NOx trap and a particulate trap|
|US20060287802 *||Jun 17, 2005||Dec 21, 2006||ArvinMeritor Emissions||Method and apparatus for determining local emissions loading of emissions trap|
|US20070012231 *||Jun 23, 2006||Jan 18, 2007||Georgia Tech Research Corporation||Systems and methods for integrated plasma processing of waste|
|US20070095053 *||Oct 31, 2005||May 3, 2007||Arvin Technologies, Inc.||Method and apparatus for emissions trap regeneration|
|US20070163387 *||Jan 17, 2006||Jul 19, 2007||Rmi Titanium Company||Method and apparatus for preheating and feeding material|
|US20070199485 *||Jun 1, 2006||Aug 30, 2007||Capote Jose A||Method and apparatus of treating waste|
|US20080147241 *||May 7, 2007||Jun 19, 2008||Placso Energy Group Inc.||Control System for the Conversion of Carbonaceous Feedstock into Gas|
|US20080202028 *||Jun 5, 2006||Aug 28, 2008||Plasco Energy Group Inc.||System For the Conversion of Carbonaceous Fbedstocks to a Gas of a Specified Composition|
|US20080209807 *||May 7, 2007||Sep 4, 2008||Andreas Tsangaris||Low Temperature Gasification Facility with a Horizontally Oriented Gasifier|
|US20080222956 *||Jun 5, 2006||Sep 18, 2008||Plasco Energy Group Inc.||System for the Conversion of Coal to a Gas of Specified Composition|
|US20080277265 *||May 12, 2008||Nov 13, 2008||Plasco Energy Group, Inc.||Gas reformulation system comprising means to optimize the effectiveness of gas conversion|
|US20090050561 *||Aug 20, 2008||Feb 26, 2009||Jon Inman Sattler||System and method for processing wastewater|
|US20090071382 *||Mar 12, 2007||Mar 19, 2009||Howard Morgan Clarke||Waste treatment apparatus and method|
|US20090200180 *||Feb 3, 2009||Aug 13, 2009||Capote Jose A||Method and apparatus of treating waste|
|US20100154304 *||Jul 17, 2008||Jun 24, 2010||Plasco Energy Group Inc.||Gasifier comprising one or more fluid conduits|
|CN1754066B||Feb 10, 2004||Feb 2, 2011||普拉斯科能源Ip控股公司毕尔巴鄂-沙夫豪森分公司||Multiple plasma generator hazardous waste processing system|
|DE3002695A1 *||Jan 25, 1980||Aug 7, 1980||Daido Steel Co Ltd||Verfahren zum fuellen eines lagerungs- faehigen behaelters mit festem radioaktivem abfall|
|DE3002696A1 *||Jan 25, 1980||Aug 7, 1980||Daido Steel Co Ltd||Vorrichtung zum feinzerkleinern radioaktiven abfalls|
|EP0290974A1 *||May 6, 1988||Nov 17, 1988||Fried. Krupp Gesellschaft mit beschränkter Haftung||Thermal treatment of solid scrap containing heavy metal compounds and/or toxic hydrocarbons|
|EP0572769A2 *||Mar 18, 1993||Dec 8, 1993||Holderbank Financiere Glarus Ag||Process for the conversion of waste incineration residues to a non-polluting product and useful for constructional purposes|
|EP0595968A1 *||Jul 16, 1992||May 11, 1994||BURGESS, Donald A.||Plasma disintegration for waste material|
|EP0959049A1 *||May 22, 1998||Nov 24, 1999||DBI DEUTSCHES BRENNSTOFFINSTITUT ROHSTOFF & ANLAGENTECHNIK GmbH||Method and apparatus for thermal transforming of waste|
|EP1533567A1 *||Nov 18, 2003||May 25, 2005||Zwilag Zwischenlager Würenlingen AG||Furnace with rotating hearth for dangerous wastes|
|WO1994003029A1 *||Jul 26, 1993||Feb 3, 1994||Vance I D S, Inc.||On-site, biohazardous waste disposal system|
|WO1996024441A2 *||Feb 2, 1996||Aug 15, 1996||Battelle Memorial Institute||Tunable, self-powered integrated arc plasma-melter vitrification system for waste treatment and resource recovery|
|WO1996024441A3 *||Feb 2, 1996||Sep 26, 1996||Battelle Memorial Institute||Tunable, self-powered integrated arc plasma-melter vitrification system for waste treatment and resource recovery|
|WO2004072547A1 *||Feb 10, 2004||Aug 26, 2004||Plasco Energy Group Inc.||Multiple plasma generator hazardous waste processing system|
|WO2005052448A1 *||Jul 3, 2004||Jun 9, 2005||Zwilag Zwischenlager Würenlingen Ag||Rotating hearth furnace for waste with a hazard potential|
|U.S. Classification||110/234, 110/243, 219/75, 219/121.11, 110/250|
|International Classification||C02F11/10, C10B19/00, F23G5/00, C03B5/00, C03B5/02, C10B53/00, F23G5/08, B01J6/00, C10J3/08, F23J1/00|
|Cooperative Classification||F23G2204/201, C10B19/00, C03B5/025, C10B53/00, C03B5/005, Y02E50/30, F23G5/085|
|European Classification||C10B19/00, C10B53/00, C03B5/02D, F23G5/08C, C03B5/00B|
|Mar 3, 1983||AS02||Assignment of assignor's interest|
Owner name: PLASMA ENERGY CORPORATION, RTE. 8, BOX 114-Z, UMST
Owner name: TECHNOLOGY APPLICATION SERVICES CORPORATION
Effective date: 19830222
|Mar 3, 1983||AS||Assignment|
Owner name: PLASMA ENERGY CORPORATION, RTE. 8, BOX 114-Z, UMST
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:TECHNOLOGY APPLICATION SERVICES CORPORATION;REEL/FRAME:004103/0965
Effective date: 19830222
Owner name: TECHNOLOGY APPLICATION SERVICES CORPORATION RALEIG
Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:B.B. OLIVE;REEL/FRAME:004099/0276
Effective date: 19830223
Owner name: TECHNOLOGY APPLICATION SERVICES CORPORATION, RALEI
Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:PLASMA GAS DEVELOPMENT CORPORATION A GA CORP.;REEL/FRAME:004099/0278
|Mar 3, 1983||AS17||Release by secured party|
Owner name: PLASMA GAS DEVELOPMENT CORPORATION A GA CORP.
Effective date: 19830222
Owner name: TECHNOLOGY APPLICATION SERVICES CORPORATION, RALEI
|Dec 6, 1982||AS02||Assignment of assignor's interest|
Owner name: CAMACHO, SALVADOR L.
Owner name: TECHNOLOGY APPLICATION SERVICES CORPORATION ROUTE
Effective date: 19821202
|Dec 6, 1982||AS||Assignment|
Owner name: TECHNOLOGY APPLICATION SERVICES CORPORATION ROUTE
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CAMACHO, SALVADOR L.;REEL/FRAME:004066/0920
Effective date: 19821202
|Nov 15, 1982||AS||Assignment|
Owner name: PLASMA GAS DEVELOPMENT CORPORATION
Free format text: SECURITY INTEREST;ASSIGNOR:TECHNOLOGY APPLICATION SERVICES CORPORATION A NC CORP.;REEL/FRAME:004062/0339
Effective date: 19770114
Owner name: PLASMA GAS DEVELOPMENT CORPORATION, STATELESS
|Nov 15, 1982||AS06||Security interest|
Owner name: PLASMA GAS DEVELOPMENT CORPORATION
Effective date: 19770114
Owner name: TECHNOLOGY APPLICATION SERVICES CORPORATION A NC C