纤维液膜接触器内复配型溶剂高效脱除液化气中有机硫  

FORMULATED SOLVENT FOR ORGANOSULFURS REMOVAL FROM LPG IN FIBER FILM CONTACTOR

作　　者：张峰[1] 沈本贤[1] 孙辉[1] 刘纪昌[1] 

机构地区：[1]华东理工大学化学工程联合国家重点实验室,上海200237

出　　处：《石油炼制与化工》2015年第6期68-73,共6页Petroleum Processing and Petrochemicals

基　　金：十二五国家科技重大专项课题"大型油气田及煤层气开发"(2011ZX05017-005);中央高校基本科研业务费专项资金资助项目(22A201514010);中国石油化工股份有限公司"十条龙"科技攻关项目(112125)

摘　　要：对比纤维液膜接触器与筛板塔的传质面积、N-甲基二乙醇胺(MDEA)与4种复配型溶剂(UDS-Ⅰ,UDS-Ⅱ,UDS-Ⅲ,UDS-Ⅳ)对有机硫的溶解性能,并在纤维液膜接触器内考察操作条件对优选溶剂脱硫效果的影响。结果表明:在纤维液膜接触器内以UDS-Ⅳ为优选溶剂脱除液化气中的硫化物,可从提高传质面积、传质推动力等方面提高有机硫传质速率,从而提高有机硫脱除率;UDS-Ⅳ溶剂对总有机硫的脱除率较MDEA高45.7百分点,总有机硫在UDS-Ⅳ溶剂-液化气体系的分配比较MDEA-液化气体系增加6~9倍;在优化的工艺条件下,UDS-Ⅳ溶剂可将焦化液化气的H_2S和总硫分别脱除至1mg/m^3和240mg/m^3以下,总有机硫脱除率高达93%以上。The mass transfer areas of the fiber film contactor and the sieve plate tower,and the sol-ubility for organosulfurs of N-methyldiethanolamine （MDEA ）and formulated solvents （UDS-Ⅰ, UDS-Ⅱ,UDS-Ⅲ,UDS-Ⅳ）were compared. In addition,the influence of operation conditions on the desulfurization performance of the preferred formulated solvent UDS-Ⅳ was investigated. The results indicate that the process combining UDS-Ⅳ and a fiber film contactor can increase the removal rate for organic sulfurs from LPG with improved mass transfer area and driving force. The removal rate for total organosulfur of UDS-Ⅳ solvent is 45.7 percentage points higher than that of MDEA. Meanwhile,the distribution ratios of organosulfurs in UDS-Ⅳ solvent-LPG system are found 7—10 times as much as those in MDEA-LPG system. Under optimum operation conditions,UDS-Ⅳ solvent can reduce the con-tents of H2 S and total sulfur of the LPG to less than 1 and 240 mg/m^3 ,respectively,and the removal ef-ficiency for total organosulfur is above 93%.

关 键 词：液化气 脱硫溶剂 有机硫 甲硫醇 羰基硫 纤维液膜接触器 

分 类 号：TE624.55[石油与天然气工程—油气加工工程]