US4402738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for incinerating self-burning wastes
Assignee: ICHINOSE Y
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Filing: 1982-02-25
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Granted: 1983-09-06
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Expires: 2002-02-25
Abstract
Abstract Disclosed are methods and apparatus for incinerating self-burning wastes by igniting the waste materials in a first chamber and limiting the supply of air in the first chamber to control the rate and temperature of combustion. The partially oxidized gasses produced in the first chamber are conducted to a second chamber through an elongated tube. Air is mixed with the partially oxidized gas in the elongated tube and the mixture ignited to complete combustion of the gasses in the tube and the second chamber. Metal wastes may be melted and recovered in the second chamber.
Inventors
- 👤 Harida Akio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:49
CPC Classifications
F; F23; F23G; F23G7/00; F23G7/12; C; C22; C22B; C22B7/00; C22B7/001; C22B7/003; F23G5/00; F23G5/08; F23G5/14; F23G5/16; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
174 words
The method of incinerating oxidizable materials comprising: (a) placing said oxidizable materials in an enclosed first chamber; (b) heating said oxidizable materials while forcing air into said first chamber until said materials are ignited; (c) venting the gas produced by partial combustion of materials in said first chamber into an elongated substantially horizontally extending tube connected with a second chamber; (d) limiting the amount of air admitted to said first chamber to control the rate of combustion of said materials thereby producing partially unoxidized gas; (e) mixing air with said partially unoxidized gas as said partially unoxidized gas passes through said elongated tube; (f) maintaining the temperature of said partially unoxidized gas in said elongated tube at least about 700° C.; (g) directing the flow of gas from said elongated tube into said second chamber; (h) venting oxidized gas from said second chamber; (i) placing materials containing metals in said second chamber; (j) recovering molten metal from said second chamber; and (k) directing a flame into said elongated tube to ignite the gasses therein.
Claim 2
Independent Claim
174 words
The method of incinerating oxidizable materials comprising: (a) placing said oxidizable materials in an enclosed first chamber; (b) heating said oxidizable materials while forcing air into said first chamber until said materials are ignited; (c) venting the gas produced by partial combustion of materials in said first chamber into an elongated substantially horizontally extending tube connected with a second chamber; (d) limiting the amount of air admitted to said first chamber to control the rate of combustion of said materials thereby producing partially unoxidized gas; (e) mixing air with said partially unoxidized gas as said partially unoxidized gas passes through said elongated tube; (f) maintaining the temperature of said partially unoxidized gas in said elongated tube at least about 700° C.; (g) directing the flow of gas from said elongated tube into said second chamber; (h) venting oxidized gas from said second chamber; (i) placing materials containing metals in said second chamber; (j) recovering molten metal from said second chamber; and (k) directing a flame into said elongated tube to ignite the gasses therein.
Claim 3
Dependent Claim
20 words
The method set forth in claim 1 wherein said air is turbulently mixed with said gas in said elongated tube.
Claim 4
Dependent Claim
20 words
The method set forth in claim 1 wherein the temperature in said second chamber is maintained at about 700°-800° C.
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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) | 1986-09-05 | 1987-03-07 | 1987-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-05 | 1991-03-07 | 1991-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-05 | 1995-03-07 | 1995-09-06 | $7700.00 | Window Closed / Lapsed |