Heat treatment of sludges
Abstract
Abstract Apparatus for the heat treatment of partially combustible products in the form of a liquid or pasty sludge including a fluidization reactor having a lower fluidization zone and an upper treatment zone, a distributor grid below the fluidization zone, means for introducing an oxidizing fluidizing agent beneath said distributor grid at a constant flow rate and through said distributor grid to said fluidization zone, means for feeding said combustible products to be treated into the upper portion of said treatment zone from the top, means for introducing into said fluidization zone an inert material of larger granular size than the size of said combustible products, means for introducing a separate fluid over said fluidizing reactor and immediately beneath said fluidization zone, which separate fluid is adapted to maintain the temperature of the fluidized layer of inert material at a valve to insure calcination of at least part of said combustible products, means for regulating the flow rate of the combustible products, and means for removing combusted material from the upper portion of said fluidization reactor.
Inventors
- 👤 Pierre Foch
Bibliographic Details
Claims Analysis
Total Claims: 1References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |