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Process of treating the gasification residue formed by the gasification of solid fuels in a fluidized bed
Process of treating the gasification residue formed by the gasification of solid fuels in a fluidized bed
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机译:处理在流化床中由固体燃料气化形成的气化残余物的方法
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摘要
In addition to ash and coke, the gasification residue contains alkaline earth metal sulfide and alkaline earth metal oxide because desulfuring agents have been supplied to the gasifier. At temperatures from 5° to 80° C. the gasification residue is mixed with an acid- containing aqueous solution so that a gas which is rich in H.sub.2 S is produced. Ash, coke, and alkaline earth metal salt are supplied to a flotation zone, in which coke is separated. A solid residue which contains ash and alkaline earth metal salt is withdrawn from the flotation zone. Carbonic acid or dilute sulfuric acid is preferably used as an acid.
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