US4359005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidized bed incineration of waste
Assignee: EI TECHNOLOGY Inc
•
Filing: 1981-08-05
•
Granted: 1982-11-16
•
Expires: 2001-08-05
Abstract
Abstract Apparatus and methods for fluidized bed incineration of waste containing phosphorus wherein the bed comprises lime or limestone which negates heretofore existing problems incident to the presence of phosphorus.
Inventors
- 👤 Virgil F. Baston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:32
CPC Classifications
F; F23; F23G; F23G5/00; F23G5/30; B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/32; G; G21; G21F; G21F9/00; G21F9/04; G21F9/06; G21F9/14; F23G2209/00; F23G2209/18
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
191 words
An incineration system comprising: a vessel; an external source of fuel; means for introduction of the fuel into the vessel; means for introduction of air into the vessel adequate to maintain fluidization and support combustion; an external source of waste comprising phosphorus; means for introducing the waste comprising phosphorus into the vessel; an external source of lime, limestone and/or slaked lime; means for causing the temperature of the fluidized bed to reach and be retained at an elevated level substantially within the range of 750° C. to 950° C. and the temperature of the vapor space to reach and be retained at an elevated level substantially within the range of 600° C. to 900° C.; a fluidized bed within the vessel wherein the material within the bed at any point in time during operation comprises (a) calcium, (b) phosphorus waste and (c) inert calcium phosphate; means for promoting the separation of calcium phosphate from the other particles of the bed, said means comprising jet grinding means, means segregating the calcium phosphate from the remainder of the bed and means causing lime, limestone and/or slaked lime to be introduced into the bed.
Claim 2
Dependent Claim
191 words
An incineration system comprising: a vessel; an external source of fuel; means for introduction of the fuel into the vessel; means for introduction of air into the vessel adequate to maintain fluidization and support combustion; an external source of waste comprising phosphorus; means for introducing the waste comprising phosphorus into the vessel; an external source of lime, limestone and/or slaked lime; means for causing the temperature of the fluidized bed to reach and be retained at an elevated level substantially within the range of 750° C. to 950° C. and the temperature of the vapor space to reach and be retained at an elevated level substantially within the range of 600° C. to 900° C.; a fluidized bed within the vessel wherein the material within the bed at any point in time during operation comprises (a) calcium, (b) phosphorus waste and (c) inert calcium phosphate; means for promoting the separation of calcium phosphate from the other particles of the bed, said means comprising jet grinding means, means segregating the calcium phosphate from the remainder of the bed and means causing lime, limestone and/or slaked lime to be introduced into the bed.
Claim 3
Dependent Claim
34 words
An incineration system according to claim 1 wherein said segregating means comprise an air delivery and exhaust system which removes the calcium phosphate from the remainder of the bed by elutriation or by draining.
References Cited (Backward Citations)
US3556024A
Cited
US3807090A
Cited
US3625164A
Cited
US3834326A
Cited
US4060041A
Cited
US4075953A
Cited
US4102277A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-15 | 1986-05-17 | 1986-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-15 | 1990-05-17 | 1990-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-15 | 1994-05-17 | 1994-11-16 | $7700.00 | Window Closed / Lapsed |