Application of Sulfur Recovery in Coal Chemical Plant
This article introduces a sulfur recovery and tail gas treatment process in a coal-to-methanol project.The sulfur recovery device combines the acid gas from the purification unit and the acid gas from the coal pressure pyrolysis-gasification integrated(CC-SI)unit The H2S is partially converted into SO2 by oxidation and combustion.The process maintains the H2S/SO2 ratio at around 2.1,and then passes through the first-level conventional Claus reaction+catalytic oxidation reaction to make H2S and SO2 is converted into liquid sulfur and water;Claus tail gas is sent to the incinerator for incineration treatment,the incineration tail gas is cooled and piped to the boiler flue gas treatment system of the power station.The Claus reaction to produce sulfur is an exothermic reaction.The sulfur plant uses a waste heat boiler to by-produce steam,recover the heat generated by the reaction,and reasonably arrange the by-product steam level to achieve the purpose of process energy saving.The process condensate produced by the device is recovered by the condensate recovery system and returned to the desalinated water station.According to the requirements of the technological process,the air cooler is used for cooling cycle,which saves circulating water consumption.The catalyst of this technology has excellent performance,long service life,high H2S conversion rate and sulfur recovery rate.The process technology is advanced,and through reasonable process arrangement and organization,device consumption is reduced and energy is saved.
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维普
