US3871839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of feeding solid carbonaceous material to a high temperature reaction zone
Assignee: Air Products and Chemicals Inc
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Filing: 1972-10-12
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Granted: 1975-03-18
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Expires: 1992-10-12
Abstract
Abstract A method of feeding solid carbonaceous material to a gasifier operating under conditions of high temperature and pressure by forming a slurry of the carbonaceous material and a liquid vehicle, raising the internal pressure of the slurry to the operating level of the gasifier, drying the carbonaceous material by entraining the carbonaceous material in a hot gas stream, and thereafter separating the carbonaceous material and feeding the carbonaceous material to the gasifier. The method is adaptable to using the gasifier effluent to dry the carbonaceous material and includes using process materials such as char accumulated from the process and condensing steam to provide a portion of the source of carbonaceous materials and vehicle for the slurry.
Inventors
- 👤 Burton E Moody
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:24
CPC Classifications
C; C10; C10J; C10J3/00; C10J3/46; C10J3/54; C10J3/48; C10J3/485; C10J3/50; C10J3/506; C10J2300/00; C10J2300/09; C10J2300/0903; C10J2300/0906; C10J2300/0913; C10J2300/093; C10J2300/094; C10J2300/0943; C10J2300/0953; C10J2300/0959; C10J2300/0973; C10J2300/18; C10J2300/1846; C10J2300/1861; C10J2300/1884; C10J2300/1892; Y; Y10; Y10S; Y10S48/00; Y10S48/07
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
86 words
A METHOD OF FEEDING CARBONACEOUS PARTICLES TO A GASIFIER OPERATING AT ELEVATED TEMPERATURE AND PRESSURE COMPRISING THE STEPS OF: FORMING A SLURRY OF SOLID CARBONACEOUS PARTICLES WITH WATER AS A LIQUID VEHICLE; PUMPING THE SLURRY INTO A DRYING CHAMBER, SAID DRYING CHAMBER BEING SEPARATED FROM SAID GASIFIER, MAINTAINED AT APPROXIMATELY THE OPERATING PRESSURE OF THE GASIFIER WHEREIN THE SLURRY IS MIXED WITH HOT EFFLUENT GASES FROM THE GASIFIER SO THAT THE CARBONACEOUS PARTICLES WITHOUT SUBSTANTIAL REACTION ARE DRIED AND HEATED AND ENTRAINED IN THE EFFLUENT GAS;
Claim 2
Independent Claim
86 words
A METHOD OF FEEDING CARBONACEOUS PARTICLES TO A GASIFIER OPERATING AT ELEVATED TEMPERATURE AND PRESSURE COMPRISING THE STEPS OF: FORMING A SLURRY OF SOLID CARBONACEOUS PARTICLES WITH WATER AS A LIQUID VEHICLE; PUMPING THE SLURRY INTO A DRYING CHAMBER, SAID DRYING CHAMBER BEING SEPARATED FROM SAID GASIFIER, MAINTAINED AT APPROXIMATELY THE OPERATING PRESSURE OF THE GASIFIER WHEREIN THE SLURRY IS MIXED WITH HOT EFFLUENT GASES FROM THE GASIFIER SO THAT THE CARBONACEOUS PARTICLES WITHOUT SUBSTANTIAL REACTION ARE DRIED AND HEATED AND ENTRAINED IN THE EFFLUENT GAS;
Claim 3
Dependent Claim
25 words
A method according to claim 1 wherein the slurry is preheated by indirect heat exchange with a hot gas prior to entering the drying chamber.
Claim 4
Dependent Claim
37 words
A method according to claim 1 wherein steam is added to the drying chamber containing the slurry and gasifier effluent gas to adjust the temperature of the effluent gas thereby controlling the humidity of the effluent gas.
Claim 5
Independent Claim
128 words
A method of feeding solid carbonaceous particles to a gasifier operating at high temperature and high pressure comprising the steps of: providing a feed stream of solid carbonaceous particles suspended in water; raising the internal pressure of the feed stream to a pressure above the operating pressure of the gasifier; introducing the pressurized feed stream to a drying chamber, said drying chamber being separated from said gasifier, wherein it is contacted by hot gaseous effluent from the gasifier without substantial reaction so that, the water is evaporated, and the dried solid carbonaceous particles are entrained in the gaseous effluent; substantially immediately separating the dried solid carbonaceous particles from the gaseous effluent; and entraining the separated solid carbonaceous particles in a stream of reactant being fed into the gasifier.
Claim 6
Independent Claim
128 words
A method of feeding solid carbonaceous particles to a gasifier operating at high temperature and high pressure comprising the steps of: providing a feed stream of solid carbonaceous particles suspended in water; raising the internal pressure of the feed stream to a pressure above the operating pressure of the gasifier; introducing the pressurized feed stream to a drying chamber, said drying chamber being separated from said gasifier, wherein it is contacted by hot gaseous effluent from the gasifier without substantial reaction so that, the water is evaporated, and the dried solid carbonaceous particles are entrained in the gaseous effluent; substantially immediately separating the dried solid carbonaceous particles from the gaseous effluent; and entraining the separated solid carbonaceous particles in a stream of reactant being fed into the gasifier.
Claim 7
Dependent Claim
39 words
A method according to claim 4 wherein the feed stream is a slurry of 40% by weight solid carbonaceous particles selected from the group consisting of coal, coke, char or mixtures thereof in water prepared in a mixing tank.
Claim 8
Dependent Claim
19 words
A method according to claim 4 wherein the slurry is preheated prior to being introduced into the drying chamber.
Claim 9
Dependent Claim
40 words
A method according to claim 4 wherein the gaseous effluent separated from the solid carbonaceous particles consists essentially of water vapor, carbon monoxide, and hydrogen, and is subjected to a subsequent shift step wherein carbon dioxide and hydrogen are produced.
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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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |