US4831944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and device for destroying solid waste by pyrolysis
Assignee: Airbus Group SAS
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Filing: 1988-01-22
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Granted: 1989-05-23
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Expires: 2008-01-22
Abstract
Abstract This invention relates to a process and device for destroying solid waste by pyrolysis, in which a column of such waste is upwardly traversed at least partially by a stream of hot gas blown in at the base of said column, wherein said stream of hot gas is generated by at least one plasma jet. The invention results in the destruction of non-burned residues and in the improved flow of the molten residues.
Inventors
- 👤 Jean-Pierre Durand
- 👤 Maxime Labrot
- 👤 Joel Truc
- 👤 Yves Valy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:37
CPC Classifications
C; C10; C10B; C10B53/00; C10B19/00; C10B49/00; C10B49/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
84 words
A process for destroying solid waste by pyrolysis, wherein a column of such waste is upwardly traversed at least partially by a stream of hot gas blown in at the base of said column, said stream of hot gas being generated by a plurality of plasma jets distributed over the periphery of said waste column, in the vicinity of the base thereof, wherein the direction of each plasma jet is inclined with respect to the direction of the corresponding radius of the waste column.
Claim 2
Dependent Claim
84 words
A process for destroying solid waste by pyrolysis, wherein a column of such waste is upwardly traversed at least partially by a stream of hot gas blown in at the base of said column, said stream of hot gas being generated by a plurality of plasma jets distributed over the periphery of said waste column, in the vicinity of the base thereof, wherein the direction of each plasma jet is inclined with respect to the direction of the corresponding radius of the waste column.
Claim 3
Dependent Claim
29 words
The process of claim 1 wherein the direction of each plasma jet is downwardly inclined with respect to the horizontal, in the direction of the base of said column.
Claim 4
Dependent Claim
19 words
The process of claim 2 wherein the direction of each plasma jet with respect to the horizontal is adjustable.
Claim 5
Dependent Claim
19 words
The process of claim 1 wherein the direction of each plasma jet with respect to said radius is adjustable.
Claim 6
Independent Claim
98 words
A device for destroying solid waste by pyrolysis, comprising a vertical wall in which is guided a column of such waste, means for blowing a jet of hot gas disposed in the lower part of said wall and means for evacuating the hot gases disposed in the top part of said wall, said gas jet blowing means being constituted by a plurality of plasma generators distributed over the periphery of said lower part of said wall, wherein the direction of each plasma jet is inclined with respect to the direction of the corresponding radius of the waste column.
Claim 7
Independent Claim
98 words
A device for destroying solid waste by pyrolysis, comprising a vertical wall in which is guided a column of such waste, means for blowing a jet of hot gas disposed in the lower part of said wall and means for evacuating the hot gases disposed in the top part of said wall, said gas jet blowing means being constituted by a plurality of plasma generators distributed over the periphery of said lower part of said wall, wherein the direction of each plasma jet is inclined with respect to the direction of the corresponding radius of the waste column.
Claim 8
Dependent Claim
17 words
The device of claim 5 wherein said plasma generators are adjustable in orientation about a horizontal axis.
Claim 9
Dependent Claim
17 words
The device of claim 5 wherein said plasma generators are adjustable in orientation about a vertical axis.
Claim 10
Dependent Claim
14 words
The device of claim 5 wherein said plasma generators are adjustable in orientation individually.
Claim 11
Dependent Claim
37 words
The device of claim 5 comprising an orifice for pouring the molten slag provided in the bottom of said device, wherein at least one of said plasma generators lies at least substantially plumb with said pouring orifice.
Claim 12
Dependent Claim
18 words
The device of claim 5 wherein said plasma generators are mounted on said wall via ball joint couplings.
Claim 13
Dependent Claim
21 words
The device of claim 10 wherein the elements of each of said ball joint couplings are pressed elastically against one another.
References Cited (Backward Citations)
US3894573A
Cited
US3841239A
Cited
US4508040A
Cited
US4546483A
Cited
US4606038A
Cited
US4718362A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-22 | 1992-11-21 | 1993-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-22 | 1996-11-21 | 1997-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-22 | 2000-11-21 | 2001-05-23 | $7700.00 | Window Closed / Lapsed |