利用焦炉煤气组合脱硫技术实现烟气SO2达标排放  

Using the Combined Desulfurization Technology of Coke Oven Gas to Realize the Standard Discharge of SO2 in Coke Flue Gas

作　　者：郑琥 李逢玲 王生荣 闫宸铭 Zheng Hu;Li Fengling;Wang Shengrong;Yan Chenming(Shanxi Dongyi Coal Power Aluminum Group Coal Chemical Co.,Ltd.,Xiaoyi Shanxi 032199,China;Shanxi Delin Hengsheng Composite Material Co.,Ltd.,Taiyuan Shanxi 030002,China)

机构地区：[1]山西东义煤电铝集团煤化工有限公司,山西孝义032199 [2]山西德林恒生复合材料有限公司,山西太原030002

出　　处：《煤化工》2020年第3期9-13,共5页Coal Chemical Industry

摘　　要：简介了国内焦化、钢铁行业污染物排放标准和超低排放标准中SO2排放限值,分析了焦炉煤气湿式氧化法脱硫后烟气SO2超标的原因。以某130万t/a焦化厂为例,介绍了真空碳酸钾脱硫的工艺流程、特点以及增设有机硫转化后的组合工艺脱硫运行效果。结果表明,采用改良真空碳酸钾组合脱硫工艺,可将现有焦炉煤气中总硫质量浓度控制在50 mg/m^3左右,燃烧后烟气中SO2质量浓度控制在20 mg/m^3左右,满足超低排放标准要求。The SO2 emission limits in coking and steel industry emission standard and ultra-low emission standard were reviewed.The reasons of excessive SO2 in flue gas after the wet oxidation desulfurization of coke oven gas were analyzed,including the desulfurization effect and existing problems after adding the organic sulfur conversion process.Taking a 1300000 t/a coking plant as an example,the process flow and characteristics of vacuum potassium carbonate desulfurization and the operation effect of desulfurization after adding organic sulfur conversion were introduced.The results showed the total sulfur concentration in coke oven gas could be controlled below 50 mg/m^3 and the mass concentration of SO2 in flue gas after combustion could be controlled below 20 mg/m^3 by using the improved vacuum potassium carbonate desulfurization process,which met the requirements of ultra-low emission standard.

关 键 词：焦炉煤气 脱硫 焦炉烟气 SO2 湿式氧化法 真空碳酸钾法 有机硫转化 

分 类 号：X701.3[环境科学与工程—环境工程]