惠生30万t/a甲醇装置硫回收工艺技术探讨

简要介绍了克劳斯硫回收的基本原理及工艺流程,着重分析了惠生30万t/a甲醇装置中硫回收工艺流程的特点以及主要生产设备的选型。该装置的硫回收工艺是将克劳斯尾气加氢后,送入粗煤气净化的低温甲醇洗装置,通过选择性吸收尾气中的H2S,使硫回收率达到99.9%,排放尾气中H2S体积分数小于2×10-6。通过以上工艺,达到节约投资、保护环境的目的。

Discussions on the Sulfur Recovery Technology Applied to Wison's 300 000t/a Methanol Plant

This paper briefly introduces the philosophy and process flow of the Klaus sulfur recovery unit, and describes particularly the features of the sulfur recovery process applied to Wison′s 300 000t/a methanol plant as well as selection of key equipment. The off-gas from Klaus unit is hydrogenated and fed to Rectisol unit for selective absorption of H2S, thus to enhance the sulfur recovery rate be up to 99.9%, and makes the concentration of H2S in the discharging off-gas less than 2×10-6. With the above-mentioned process, the plant is investment saving and environmental friendly.