液化石油气脱硫醇装置工艺改造及效果分析

Process modification and effect analysis of LPG sweetening unit

中国石油化工股份有限公司洛阳分公司原液化石油气脱硫醇装置在运行过程中周期性出现脱后总硫超标,影响装置的正常生产。通过对原工艺流程进行分析,查找出导致脱硫效率降低的原因,并有针对性地进行了改造。工艺改造后,装置脱硫总效率由65.8%提高到95.5%,硫醇性硫脱除率由80.7%提高到98.3%,同时降低了装置运行成本,降低了操作人员劳动强度,减少了碱渣排放量,运行至今未再出现脱后液化石油气硫含量超标的问题。

In the operation of LPG sweetening unit, the sulfur in LPG after sweetening was always over standard specifications, which seriously affected the normal production of the unit. The original primary process was analyzed and the root causes of over-specification of sulfur were found out, based upon which the unit was revamped with the new process. After revamping of the unit, the total desulfurization rate was increased from 65.8% to 95.5% , and the mercaptan removal efficiency was elevated from 80.7% to 98.3%. In addition, the new process has reduced the operation costs, the labor intensity of operator and the production of caustic sludge. There is no off-specification of sulfur in sweetened LPG ever since.