基于流程模拟对脱硫醇装置纤维膜结垢倾向预判  

PREDICTION OF FIBER FOULING TENDENCY IN SWEETENING PLANT BASED ON PROCESS SIMULATION

作　　者：李凯[1] 张苡源[1] 杨磊[1] 曲铭卿 郝永杰[1] Li Kai;Zhang Yiyuan;Yang Lei;Qu Mingqing;Hao Yongjie(SINOPEC Qingdao Refining and Chemical Co.Ltd.,Qingdao,Shandong 266555)

机构地区：[1]中国石化青岛炼油化工有限责任公司,山东青岛266555

出　　处：《石油炼制与化工》2021年第3期83-86,共4页Petroleum Processing and Petrochemicals

摘　　要：中国石化青岛炼油化工有限责任公司(简称青岛炼化)液化气精制系统采用纤维膜脱硫醇技术,液化气中的H2S及小分子硫醇与碱液接触反应生成硫化钠和硫醇钠并溶解于碱液中,实现H2S和硫醇的脱除。实际生产运行中纤维丝表面有明显的结垢倾向,纤维丝表面的结垢物缠连会导致碱液无法均相分散,出现液化气“短路”的情况,致使碱液和液化气相间接触不充分,极易造成精制液化气硫醇含量超标。通过对纤维丝表面垢样进行溶液电位滴定以及X射线光谱分析,发现结垢物的主要组成为Na2CO3。为了对脱硫醇装置纤维膜结垢倾向进行预判,应用Aspen Plus软件对脱硫醇系统的运行工况模拟,寻找脱硫醇系统的操作优化方案,以保证纤维膜接触器的长周期运行。The technology of fiber membrane was adopted in the LPG sweetening system of SINOPEC Qingdao Refining and Chemical Co.Ltd.The small molecule mercaptan and H2S in LPG reacted with alkali solution to generate sodium mercaptan compound and sodium sulfide,which was dissolved in alkali solution to realize the removal of mercaptan and H2S.In the operation,the fiber surface had obvious scaling tendency.When the fiber was scaling and entangled,the alkali liquor couldn’t be uniformly dispersed,and the LPG“short circuit”would occur.If the contact between alkali liquor and LPG was not enough,the mercaptan content in refined LPG would exceed the standard.Through the solution potentiometric titration and X-ray spectrum analysis of the scale sample on the fiber surface,it was found that the main component was Na2CO3.Aspen Plus was used to simulate and calculate the operation conditions of the sweetening system to find out the optimization operation conditions to ensure the long-term operation of the fiber membrane contactor.

关 键 词：羰基硫 脱硫醇 纤维膜 再生温度 溶解度 

分 类 号：TE6[石油与天然气工程—油气加工工程]