焦炉煤气精脱硫系统的研究与优化  

Research and optimization of desulfurization system for coke oven gas

作　　者：徐贺明[1,2] 屈一新[1] 闪俊杰[2] 王志彦[2] 

机构地区：[1]北京化工大学化学工程学院,北京100029 [2]唐山中润煤化工有限公司,河北唐山063611

出　　处：《天然气化工—C1化学与化工》2015年第4期64-68,共5页Natural Gas Chemical Industry

摘　　要：对焦炉煤气制甲醇生产过程中存在的精脱硫系统一级加氢反应器温升高、床层压降大、催化剂使用寿命低、必须停车更换催化剂等问题进行了原因分析。根据焦炉煤气(COG)中二硫化碳(CS2)、硫氧化碳(COS)、乙硫醇(C2H5SH)、噻吩(C4H4S)4种有机硫的转化特点,合理解释了COS不能被完全加氢转化、C2H5SH与C4H4S在一级加氢反应器出口浓度增加现象。通过对上述问题的研究与分析,制定了焦炉煤气精脱硫系统优化方案。该方案实施后有效解决了生产实际问题,实现了不停车更换加氢脱硫催化剂,可以提高整套装置的开工率,为企业带来间接经济效益。The reasons of high reaction temperature, high pressure drop, low catalyst service life and stopping operation to replace the catalyst for the first hydrogenation reactor in the fine desulfurization system of a methanol plant using coke oven gas as feedstock were analyzed, and according to the conversion characteristics of carbon disulfide （CS2）, carbonyl sulfide （COS）, ethanethiol （C2HsSH） and thiophene （C4H4S） in coke oven gas （COG）, a reasonable explanation for COS couldn＇t be completely conversed by hydrogenation and the concentrations of C2HsSH and C4H4S at the outlet of the first hydrogenation reactor increased was given, based on which, a coke oven gas desulfurization system optimization scheme was formulated. The implementation of the optimized scheme effectively solved the practical problems of production, achieving non-stop replacing of the hydrodesulfurization catalyst and improving operating rate and economic effect of whole methanol plant.

关 键 词：焦炉煤气 精脱硫 有机硫转化 温升 压降 不停车更换催化剂 优化改造 

分 类 号：TQ546.5[化学工程—煤化学工程] TQ522.61