柴油加氢精制装置胺液脱硫系统问题分析及对策  

Problem analysis and countermeasure of amine solution desulphurization system in diesel hydrofining unit

作　　者：徐浩[1] Xu Hao(Sinopec Maoming Petrochemical Company,Maoming 525011,China)

机构地区：[1]中国石油化工股份有限公司茂名分公司,广东茂名525011

出　　处：《炼油与化工》2023年第3期45-48,共4页Refining And Chemical Industry

摘　　要：某石化公司260×104t/a柴油加氢精制装置胺液脱硫系统包括循环氢脱硫和干气脱硫2部分,脱硫工艺使用N-甲基二乙醇胺(MDEA)作为脱硫剂,循环氢和干气分别在浮阀塔和填料塔中与脱硫剂逆流接触,发生化学反应以脱除H2S。但是,由于胺液发泡导致循环氢脱硫塔冲塔,循环氢带液使循环机跳停,造成装置非计划停工,严重影响装置安全生产和长周期稳定运行。针对胺液发泡问题,研究发现贫胺液夹带机械杂质多,循环氢/干气带液和脱硫塔T103/T104运行负荷过大是该装置胺液发泡的主要原因,并提出了原料气及胺液净化处理、优化工艺操作参数、加注合适的消泡剂和使用性能更优的塔盘的措施,以供同类装置借鉴。The amine solution desulfurization system of 260×10^(4) t/a diesel hydrorefining unit of a petrochemical company consisted of two parts:circulating hydrogen desulfurization and dry gas desulfurization.N-methyledithanolamine(MDEA)was used as desulfurizer in the desulfurization process.Circulating hydrogen and dry gas were in countercurrent contact with the desulfurizer in the floating valve tower and the packing tower respectively and produced chemical reaction to remove H_(2)S.However,due to the foaming of the amine solution,the circulating hydrogen desulfurization tower wouldflush,and the circulating hydrogen carrying liquid would make the circulating machine trip,resulting in the unplanned plant shutdown,which seriously affected the safe production and long-term stable operation.In view of the problem of amine foam,it was found that the main causes of amine foam were high mechanical impurities in the lean amine solution,excessive circulating hydrogen/dry gas with liquid and excessive operating load of the desulfurization tower T103/T104.Some measures were put forward such as purifying the feedstock gas and amine solution,optimizing the process operation parameters,adding appropriate defoamer and using better tray,so as to provide reference for similar plants.

关 键 词：柴油加氢精制 胺液 脱硫 H2S 发泡 

分 类 号：TE624.55[石油与天然气工程—油气加工工程]