焦炉煤气一塔式脱硫技术研究及应用

Research and application of tower desulfurization technology for coke oven gas

为了达到GB 16171—2012《炼焦化学工业污染物排放标准》中关于焦炉煤气中焦炉煤气在燃烧时排放SO2的浓度不大于50 mg/m^3的要求,山西焦化集团有限公司从2014—2015年对现有的煤气脱硫系统进行了焦炉煤气H_2S含量提标改造。针对改造现场场地小、毗邻苯装置区特点,提出此次工艺流程短、占地面积小,充分利用竖向空间的要求。此次改造选用了PDS一塔式脱硫技术,该技术具有流程短、占地面积小、投资少等特点。生产结果表明,一塔式脱硫技术可将焦炉煤气中的H_2S浓度脱除至小于20 mg/m^3,满足国家环保要求。

In order to achieve the SO2 emission being no more than 50 mg/m^3 in coke oven gas according to the ＂GB 16171--2012＂ stand- ard in coking chemical industry, Shanxi Coking Group Limited company updated and reconstructed the desulfurization system from 2014 to 2015. The vertical space was considered adequately used for shortening the process ,because of the limit of place and adjacent to benzene unit. The PDS tower desulfurization technology was adopted during technical reforming. The technology had the advantages of short process, small footprint,less investment, etc. Results show that the HzS concentration in coke oven gas can be reduced to less than 20 mg/m^3, which can completely meet the requirements of national environmental protection.