US4311670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidized bed reactor system
Assignee: Amec Foster Wheeler Energia Oy
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Filing: 1980-01-04
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Granted: 1982-01-19
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Expires: 2000-01-04
Abstract
Abstract A fluidized bed reactor where material from a prereactor is brought into contact with hot particles separated from flue gases. The particles when removed from the flue gases by a separator are passed to a prereactor having a gas supply and vapor removal port where the hot particles are mixed with fresh feed material and the mixture is passed to the fluidized bed reactor for chemical and/or thermal treatment.
Inventors
- 👤 Jorma J. Nieminen
- 👤 Engstrom Folke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:47
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/0085; D21C11/0092; B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/32; C; C02; C02F; C02F11/00; C02F11/12; C02F11/13; C10; C10B; C10B49/00; C10B49/16; C10B53/00; F; F23; F23G; F23G5/00; F23G5/30; F23G2201/00; F23G2201/10; F23G2203/00; F23G2203/50; F23G2203/501
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
208 words
An apparatus for heat treatment of a material in a fluidized bed which consists essentially of: (1) means defining a single fluidized bed reactor in which the heat treatment of said material is carried out; (2) a prereactor, of the non-fluidized bed type, for preheating the material to be subjected to said heat treatment; (3) means for transferring the preheated material from the prereactor to the lower part of the reactor; (4) first inlet means for air located in the bottom part of the reactor; (5) at least one second inlet means for secondary air located at the level above said first inlet means for said air; (6) outlet means located in the upper part of the reactor for removal of the flue gases generated in the reactor, which flue gases contain entrained solid particles; (7) separating means to separate the solid particles entrained in said flue gases; (8) conduit means for recirculating said solid particles into the prereactor and for mixing said solid particles with the material to be subjected to said heat treatment; (9) means for introducing a gas into the prereactor; (10) means for the removal of vapors from the prereactor and (11) means for introducing said vapors into the upper part of the reactor.
Claim 2
Independent Claim
208 words
An apparatus for heat treatment of a material in a fluidized bed which consists essentially of: (1) means defining a single fluidized bed reactor in which the heat treatment of said material is carried out; (2) a prereactor, of the non-fluidized bed type, for preheating the material to be subjected to said heat treatment; (3) means for transferring the preheated material from the prereactor to the lower part of the reactor; (4) first inlet means for air located in the bottom part of the reactor; (5) at least one second inlet means for secondary air located at the level above said first inlet means for said air; (6) outlet means located in the upper part of the reactor for removal of the flue gases generated in the reactor, which flue gases contain entrained solid particles; (7) separating means to separate the solid particles entrained in said flue gases; (8) conduit means for recirculating said solid particles into the prereactor and for mixing said solid particles with the material to be subjected to said heat treatment; (9) means for introducing a gas into the prereactor; (10) means for the removal of vapors from the prereactor and (11) means for introducing said vapors into the upper part of the reactor.
Claim 3
Independent Claim
249 words
An apparatus for heat treatment of a material in a fluidized bed which comprises: (1) means defining a single fluidized bed reactor in which the heat treatment of said material is carried out; (2) a prereactor for preheating the material to be subjected to said heat treatment; (3) means for transferring the preheated material from the prereactor to the lower part of the reactor; (4) first inlet means for air located in the bottom part of the reactor; (5) at least one second inlet means for secondary air located at the level above said first inlet means for said air; (6) outlet means located in the upper part of the reactor for removal of the flue gases generated in the reactor, which flue gases contained entrained solid particles; (7) separating means to separate the solid particles entrained in said flue gases; (8) conduit means for recirculating said solid particles into the prereactor and for mixing said solid particles with the material to be subjected to said heat treatment; (9) means for introducing a gas into the prereactor; (10) means for the removal of vapors from the prereactor; (11) means for introducing said vapors into the upper part of the reactor, wherein the prereactor is provided with third inlet means for the introduction of make-up chemicals into the prereactor and wherein the apparatus is provided with a mixer for mixing the material to be subjected to said heat treatments with make-up chemicals, said mixer being located upstream of the prereactor.
Claim 4
Independent Claim
249 words
An apparatus for heat treatment of a material in a fluidized bed which comprises: (1) means defining a single fluidized bed reactor in which the heat treatment of said material is carried out; (2) a prereactor for preheating the material to be subjected to said heat treatment; (3) means for transferring the preheated material from the prereactor to the lower part of the reactor; (4) first inlet means for air located in the bottom part of the reactor; (5) at least one second inlet means for secondary air located at the level above said first inlet means for said air; (6) outlet means located in the upper part of the reactor for removal of the flue gases generated in the reactor, which flue gases contained entrained solid particles; (7) separating means to separate the solid particles entrained in said flue gases; (8) conduit means for recirculating said solid particles into the prereactor and for mixing said solid particles with the material to be subjected to said heat treatment; (9) means for introducing a gas into the prereactor; (10) means for the removal of vapors from the prereactor; (11) means for introducing said vapors into the upper part of the reactor, wherein the prereactor is provided with third inlet means for the introduction of make-up chemicals into the prereactor and wherein the apparatus is provided with a mixer for mixing the material to be subjected to said heat treatments with make-up chemicals, said mixer being located upstream of the prereactor.
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) | 1985-01-18 | 1985-07-20 | 1986-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-18 | 1989-07-20 | 1990-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-18 | 1993-07-20 | 1994-01-19 | $7700.00 | Window Closed / Lapsed |