Two-stage coal gasification and desulfurization apparatus
August 3, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3454382 3818869 3873845 Production of hot clean industrially usable gas Production of water gas as a load leveling approach for coal gasification power plants Process for purifying a gas containing hydrogen sulfide and contact masses usable therefor Production of H2 and co-containing gas stream and power Method of cooling partial oxidation gas containing finely divided impurities and used for combustion in a combined gas-steam turbine of a power plant Pyrolysis and combustion process and system Non-polluting method of burning fuel for heat and CO2 InventorsAssigneeApplicationNo. 562298 filed on 08/03/1990US Classes:48/77, Coal48/63, Air and steam injected48/76, Producers60/39.12, With combustible gas generator60/39.182, Steam and combustion products110/229Means for liberating gas from solid fuelExaminersPrimary: Kratz, PeterAttorney, Agent or FirmInternational ClassesC10J 003/20C10J 003/84 C10J 003/86 AbstractThe present invention is directed to a system which effectively integrates a two-stage, fixed-bed coal gasification arrangement with hot fuel gas desulfurization of a first stream of fuel gas from a lower stage of the two-stage gasifier and the removal of sulfur from the sulfur sorbent regeneration gas utilized in the fuel-gas desulfurization process by burning a second stream of fuel gas from the upper stage of the gasifier in a combustion device in the presence of calcium-containing material. The second stream of fuel gas is taken from above the fixed bed in the coal gasifier and is laden with ammonia, tar and sulfur values. This second stream of fuel gas is burned in the presence of excess air to provide heat energy sufficient to effect a calcium-sulfur compound forming reaction between the calcium-containing material and sulfur values carried by the regeneration gas and the second stream of fuel gas. Any ammonia values present in the fuel gas are decomposed during the combustion of the fuel gas in the combustion chamber. The substantially sulfur-free products of combustion may then be combined with the desulfurized fuel gas for providing a combustible fluid utilized for driving a prime mover.Other References
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