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中国长庆气田已建成投产 5套 2 0 0× 10 4 m3 /d和 1套 40 0× 10 4 m3 /dMDEA脱硫装置 ,由于原料气中的H2 S/CO2 比高达 90～ 16 0 ,使净化气中的CO2 含量达不到管输标准。鉴于此 ,对长庆气田目前应用的MDEA法选择性脱硫技术进行了分析研究 ,并从脱硫脱碳溶液的选择、原料气进吸收塔温度和贫液循环流程的确定、吸收塔结构的选型、汽提塔筒体材质的选择以及吸收塔塔内温度分布和检测等方面 ,对已建脱硫装置的工艺技术提出了改进意见 ,并对拟建的脱硫装置工艺技术提出了建议。

Research and Application of Amine-gas Desulphrization Techniques in Changqing Gas Field

??Five sets of 2×10⁶m³/d and one set of 4×10⁶m³/d MDEA desulphrization devices were built up in Changqing Gas Field,however,the CO₂ content in the purified gas didn't satisfy the pipeline transportation standard because of high H₂S-CO₂ ratios (90??160).For this reason,on the basis of analyzing the methyl diethanolamine (MDEA) selective desulphurization techniques applied in Changqing Gas Field at present,Some improved opinions about the techniques of the desulphurization devices built up are proposed from the following aspects,such as the selection of desulphurization and decarbonization solutions,the determination of the crude material gas entering absorber temperature and the lean solution circulating procedure,the type selection of absorber structure.the selection of cylinder material of the stripping tower,and the distribution and detection of the temperatures in the absorber,etc.,and some suggestions are offered on the techniques of the desulphurization devices planning to go to being built up.