US3707129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for disposing of refuse
Assignee: Ebara Corp
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Filing: 1971-08-16
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Granted: 1972-12-26
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Expires: 1991-08-16
Abstract
Abstract An apparatus for disposal of refuse consists of three sections arranged in vertical sequence and communicating by means of ports which permit refuse to pass from the top chamber to the bottom chamber. The refuse is dried in the top chamber, gasified in the middle chamber and burned in the bottom chamber. Exhaust gases from the bottom chamber, in part, pass upwardly through downwardly moving refuse to effect gasification in the middle chamber and drying in the top chamber. Exhaust gases from the top chamber are treated to remove noxious and corrosive components prior to recycling to the apparatus and to venting. The method and apparatus are suitable for use with mixed refuse containing among other components, glass, metal and garbage.
Inventors
- 👤 Kensuke Kawashimo
- 👤 Kazuo Tsukagoshi
- 👤 Tokio Itasaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:40
CPC Classifications
F; F23; F23G; F23G5/00; B; B09; B09B; B09B3/00; B09B3/40; B09B3/45
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
138 words
A method of disposing of refuse without emission of noxious gases comprising the successive steps of drying, gasifying and combustion of said refuse while moving said refuse downwardly through three regions in each of which one of said steps is carried out, wherein a portion of the exhaust gases formed during said combustion step are passed upwardly into said gasifying region, thence to said drying region and out of said drying region, said exhaust gases containing gases and vapors produced in said gasifying region and being first treated to remove noxious and corrosive components after which a portion of said treated exhaust gases is recycled in part to said drying section and in part to said combustion section to serve as auxiliary fuel, the remainder of said treated gas being optionally stored for use as fuel or vented.
Claim 2
Independent Claim
138 words
A method of disposing of refuse without emission of noxious gases comprising the successive steps of drying, gasifying and combustion of said refuse while moving said refuse downwardly through three regions in each of which one of said steps is carried out, wherein a portion of the exhaust gases formed during said combustion step are passed upwardly into said gasifying region, thence to said drying region and out of said drying region, said exhaust gases containing gases and vapors produced in said gasifying region and being first treated to remove noxious and corrosive components after which a portion of said treated exhaust gases is recycled in part to said drying section and in part to said combustion section to serve as auxiliary fuel, the remainder of said treated gas being optionally stored for use as fuel or vented.
Claim 3
Dependent Claim
82 words
The method of claim 1, wherein a portion of the exhaust gases formed in said combustion of said refuse in said third region passes upward into said second region to cooperate with said humid gas in gasifying said organic components, with the remainder of said exhaust gases being led to the exterior of said third region to heat said air which, in part, enters said third region as blast air and which, in part is humidified and then enters said second region.
Claim 4
Dependent Claim
38 words
The method of claim 1, wherein the quantity, temperature and humidity of said humid air introduced into said second region are controlled to provide suitable conditions for gasification while preventing combustion of said refuse in said second region.
Claim 5
Independent Claim
234 words
An apparatus for disposing of refuse without emission of noxious by-products, comprising a drying section having a port for the introduction of refuse and a dried refuse port proximate the lowest portion thereof for passage of dried refuse therefrom in a downward direction and for passage of hot gas in an upward direction, a waste gas exit port leading from said drying section, a hot gas inlet port leading into said drying section for introduction of heated gas free of noxious components, a gasifying section communicating proximate the uppermost portion thereof with said drying section by means of said dried refuse port, an input port proximate the lower portion of said gasifying section for the introduction of heated, high-humidity air, a gasified refuse port proximate the lowest portion of said gasifying section for passage of gasified refuse therethrough in a downward direction and for passage of combustion exhaust gases therethrough in an upward direction, a combustion section communicating proximate the uppermost portion thereof with said gasifying section by means of said gasified refuse port, an incinerator in said combustion section, a first input port for introduction of heated, blast air, a second input port for introduction of recycled waste gas freed of noxious by-products from said waste gas exit port and a residue exhausting port proximate the lowest portion of said combustion section for the removal of non-gaseous products formed in said combustion section.
Claim 6
Independent Claim
234 words
An apparatus for disposing of refuse without emission of noxious by-products, comprising a drying section having a port for the introduction of refuse and a dried refuse port proximate the lowest portion thereof for passage of dried refuse therefrom in a downward direction and for passage of hot gas in an upward direction, a waste gas exit port leading from said drying section, a hot gas inlet port leading into said drying section for introduction of heated gas free of noxious components, a gasifying section communicating proximate the uppermost portion thereof with said drying section by means of said dried refuse port, an input port proximate the lower portion of said gasifying section for the introduction of heated, high-humidity air, a gasified refuse port proximate the lowest portion of said gasifying section for passage of gasified refuse therethrough in a downward direction and for passage of combustion exhaust gases therethrough in an upward direction, a combustion section communicating proximate the uppermost portion thereof with said gasifying section by means of said gasified refuse port, an incinerator in said combustion section, a first input port for introduction of heated, blast air, a second input port for introduction of recycled waste gas freed of noxious by-products from said waste gas exit port and a residue exhausting port proximate the lowest portion of said combustion section for the removal of non-gaseous products formed in said combustion section.
Claim 7
Dependent Claim
37 words
An apparatus for disposing of refuse without emission of noxious by-products as defined in claim 4, wherein said combustion section comprises a downwardly reflecting wall in the upper portion thereof for reflecting heat to the contents thereof.
Claim 8
Dependent Claim
37 words
An apparatus for disposing of refuse without emission of noxious by-products as defined in claim 4, wherein said combustion section has a burning zone therein and is provided with a refractory wall in the upper portion thereof.
Claim 9
Dependent Claim
95 words
An apparatus for disposing of refuse without emission of noxious by-products as defined in claim 4, further comprising a dry distillation section intermediate said drying section and said gasifying section, said dry distillation section communicating proximate the uppermost portion thereof with said drying sectiOn by means of said dried refuse port, and having proximate the lowest portion thereof a dry-distilled refuse port communicating with said gasifying section for transfer of dry-distilled refuse in a downward direction to said gasifying section and for passage of hot humid gas from said gasifying section in an upward direction.
Claim 10
Dependent Claim
46 words
An apparatus for disposing of refuse without emission of noxious by-products as defined in claim 4, further comprising a dephlegmator for removal of offensive by-products from said waste gas prior to recycle of portions of said waste gas to said drying section and said combustion section.
Claim 11
Dependent Claim
39 words
An apparatus for disposing of refuse without emission of noxious by-products as defined in claim 4, wherein said gasifying section is frustoconical in shape and is rotatable for the purpose of controlling the rate of passage of refuse therethrough.
Claim 12
Dependent Claim
22 words
An apparatus for disposing of refuse without emission of noxious by-products as defined in claim 9, wherein said gasifying section is water-cooled.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |