US3853498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of high energy fuel gas from municipal wastes
Assignee: Individual
•
Filing: 1972-06-28
•
Granted: 1974-12-10
•
Expires: 1992-06-28
Abstract
Abstract Municipal waste is converted into high energy fuel gas by pyrolyzing same in a pyrolysis reaction zone, the heat energy required for such endothermic pyrolysis reaction being transferred from an exothermic reaction zone. Both reaction zones comprise a bed of fluidized inert solids, and the heat of pyrolysis is transferred by circulating therebetween the fluidized inert solids.
Inventors
- 👤 R Bailie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:03
CPC Classifications
C; C10; C10J; C10J3/00; C10J3/72; C10J3/82; C10J3/84; C01; C01B; C01B32/00; C01B32/30; C01B32/312; C01B32/318; C01B32/324; C10B; C10B49/00; C10B49/16; C10B49/20; C10B49/22; C10B53/00; C10J3/46; C10J3/48; C10J3/482; C10J3/58; F; F23; F23G; F23G5/00; F23G5/02; F23G5/027; F23G5/30; C10G; C10G2300/00; C10G2300/10; C10G2300/1003; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/0916; C10J2300/092; C10J2300/0946; C10J2300/0953; C10J2300/0956; C10J2300/0983; C10J2300/0993; C10J2300/16; C10J2300/1603; C10J2300/1606; C10J2300/164; C10J2300/1656; C10J2300/1662; C10J2300/18; C10J2300/1807; F23G2201/00; F23G2201/30; F23G2201/303; F23G2201/304; F23G2203/00; F23G2203/50; F23G2203/503; Y; Y02; Y02E; Y02E50/00; Y02E50/10
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
209 words
A METHOD FOR THE GASIFICATION OF MULTICIPAL WASTE TO PRODUCE HIGH ENERGY FUEL GAS, WHICH METHOD COMPRISES: I. PYROLYZING A MUNICIPAL WASTE FEED, IN AN INERT, OXYGEN-FREE ATMOSPHERIC, IN AN INDOTHEROMIC PYROLYSIS REACTION ZONE TO THUS GASIFY THE SAME IN THE ABSENCE OF SUBSTANTIAL BYPRODUCTION OF LIQUID REACTION PRODUCTS; II. THE SAID PYROLYSIS REACTION ZONE COMPRISING A DENSE BED OF FLUIDIZED, INERT PARTICLES SOLIDS; III. SAID PYROLYSIS REACTION OPERATING UNDER ESSENTIALLY ISOTHERMAL CONDITIONS; IV. THE HEAT ENERGY REQUIRED FOR SAID PYROLYSIS REACTION BEING GENERATED BY EXOTHERMIC COMBUSTION REACTION IN A DISTINCT, EXOTHERMIC COMBUSTION REACTION ZONE; V. SAID EXOTHERMIC COMBUSTION REACTION ZONE ALSO COMPRISING A BED OF INERT PARTICULATE SOLIDS; VI. THE FLUIDIZED, INERT PARTICULATE SOLIDS IN SAID ENDOTHERMIC PYROLYSIS REACTION ZONE BEING IN COMMUNICATING RELATIONSHIP WITH THE INERT PARTICULATE SOLIDS IN SAID EXOTHERMIC COMBUSTION REACTION ZONE; VII. SAID GENERATED HEAT OF EXOTHERMIC COMBUSTION REACTION BEING TRANSFERRED TO SAID ENDOTHERMIC PYROLYSIS REACTION ZONE TO PROVIDE THE SAID HEAT ENERGY REQUIREMENTS THEREOF, WITHOUT SUBSTANTIAL TRANSFERENCE OF EITHER REACTANTS FOR OR REACTION PRODUCTS OF SAID EXOTHERMIC COMBUSTION REACTION, BY CIRCULATING THE RESPECTIVE INERT PARTICULATE SOLIDS BETWEEN THE SAID EXOTHERMIC COMBUSTION REACTION ZONE AND THE SAID ENODOTHERMIC PYROLYSIS REACTION ZONE; AND VIII. WHEREBY THE PYROLYSIS GAS PRODUCT COMPRISES THE HIGH ENERGY FUEL GAS.
Claim 2
Independent Claim
209 words
A METHOD FOR THE GASIFICATION OF MULTICIPAL WASTE TO PRODUCE HIGH ENERGY FUEL GAS, WHICH METHOD COMPRISES: I. PYROLYZING A MUNICIPAL WASTE FEED, IN AN INERT, OXYGEN-FREE ATMOSPHERIC, IN AN INDOTHEROMIC PYROLYSIS REACTION ZONE TO THUS GASIFY THE SAME IN THE ABSENCE OF SUBSTANTIAL BYPRODUCTION OF LIQUID REACTION PRODUCTS; II. THE SAID PYROLYSIS REACTION ZONE COMPRISING A DENSE BED OF FLUIDIZED, INERT PARTICLES SOLIDS; III. SAID PYROLYSIS REACTION OPERATING UNDER ESSENTIALLY ISOTHERMAL CONDITIONS; IV. THE HEAT ENERGY REQUIRED FOR SAID PYROLYSIS REACTION BEING GENERATED BY EXOTHERMIC COMBUSTION REACTION IN A DISTINCT, EXOTHERMIC COMBUSTION REACTION ZONE; V. SAID EXOTHERMIC COMBUSTION REACTION ZONE ALSO COMPRISING A BED OF INERT PARTICULATE SOLIDS; VI. THE FLUIDIZED, INERT PARTICULATE SOLIDS IN SAID ENDOTHERMIC PYROLYSIS REACTION ZONE BEING IN COMMUNICATING RELATIONSHIP WITH THE INERT PARTICULATE SOLIDS IN SAID EXOTHERMIC COMBUSTION REACTION ZONE; VII. SAID GENERATED HEAT OF EXOTHERMIC COMBUSTION REACTION BEING TRANSFERRED TO SAID ENDOTHERMIC PYROLYSIS REACTION ZONE TO PROVIDE THE SAID HEAT ENERGY REQUIREMENTS THEREOF, WITHOUT SUBSTANTIAL TRANSFERENCE OF EITHER REACTANTS FOR OR REACTION PRODUCTS OF SAID EXOTHERMIC COMBUSTION REACTION, BY CIRCULATING THE RESPECTIVE INERT PARTICULATE SOLIDS BETWEEN THE SAID EXOTHERMIC COMBUSTION REACTION ZONE AND THE SAID ENODOTHERMIC PYROLYSIS REACTION ZONE; AND VIII. WHEREBY THE PYROLYSIS GAS PRODUCT COMPRISES THE HIGH ENERGY FUEL GAS.
Claim 3
Dependent Claim
19 words
The method as defined by claim 1, wherein flash pyrolysis is approached in the said endothermic pyrolysis reacton zone.
Claim 4
Dependent Claim
24 words
The method as defined by claim 2, wherein the bed of inert particulate solids comprising the exothermic combustion reacton zone is a fluidized bed.
Claim 5
Dependent Claim
23 words
The method as defined by claim 3, wherein a portion of the pyrolysis gas product is recycled to the endothermic pyrolysis reacton zone.
Claim 6
Dependent Claim
29 words
The method as defined by claim 4, wherein the said recycled pyrolysis gas product is utilized to fluidize the inert particulate solids comprising the said endothermic pyrolysis reacton zone.
Claim 7
Dependent Claim
23 words
The method as defined by claim 5, wherein solid activated carbon char is produced as a by-product of the said endothermic pyrolysis reacton.
Claim 8
Dependent Claim
23 words
The method as defined by claim 6, wherein the said by-produced solid activated carbon char is recycled to the exothermic combustion reacton zone.
Claim 9
Dependent Claim
22 words
The method as defined by claim 7, wherein the said recycled, by-produced solid activated carbon char fuels the said exothermic combustion reaction.
Claim 10
Dependent Claim
26 words
The method as defined by claim 8, wherein air is injected into said exothermic combustion reaction zone to fluidize the inert particulate solids comprising the same.
Claim 11
Dependent Claim
24 words
The method as defined by claim 9, wherein any char comprising the products of combustion is Recycled to the said exothermic combustion reaction zone.
Claim 12
Dependent Claim
31 words
The method as defined by claim 10, wherein the said pyrolysis gas product is treated through a water gas shift reactor, a carbon dioxide scrubber, a cleanup washer and a methanator.
Claim 13
Dependent Claim
64 words
The method as defined by claim 10, wherein the inert particulate solids comprising the endothermic pyrolysis reaction zone and the exothermic combustion reaction zone comprise a high silica sand, wherein the said endothermic pyrolysis reaction is conducted at a temperature of from about 1,300* to 1,500*F., and wherein the said exothermic combustion reaction is conducted at a temperature of from about 1,500* to 1,800*F.
Claim 14
Dependent Claim
33 words
The method as defined by claim 10, wherein the municipal waste feed pyrolyzed is selected from the group consisting of municipal solid wastes, wood wastes, agricultural wastes, waste liquid organics and sewage sludge.
Claim 15
Dependent Claim
29 words
The method as defined by claim 13, wherein the municipal waste feed is comminuted to a particle size of less than about 2 inches, and is bone-dry and ash-free.
Claim 16
Dependent Claim
19 words
The method as defined by claim 10, wherein hydrogen gas is stripped from the said endothermic pyrolysis reaction zone.
References Cited (Backward Citations)
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US2557680A
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US2677603A
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GB676391A
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US2840462A
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US3698882A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |