可再生型离子液体在脱硫工艺中的应用  

Application of renewable ionic liquid in desulfurization process

作　　者：卓俭进 韩战旗 张彦茹 朱兴荣 赵嵘峥 许名湘 ZHUO Jian-jin;HAN Zhan-qi;ZHANG Yan-ru;ZHU Xing-rong;ZHAO Rong-zheng;XU Ming-xiang(Henan Zhongyuan Gold Smelter Co.,Ltd.,Sanmenxia 472000,China;Henan Key Laboratory of Comprehensive Utilization of Gold Resources,Sanmenxia 472000,China)

机构地区：[1]河南中原黄金冶炼厂有限责任公司,河南三门峡472000 [2]河南省黄金资源综合利用重点实验室,河南三门峡472000

出　　处：《中国有色冶金》2022年第6期103-109,共7页China Nonferrous Metallurgy

摘　　要：以有机阳离子、无机阴离子为主,添加少量活化剂、抗氧化剂组成的绿色可再生型离子液体水溶液,作为脱硫吸收剂可实现烟气中的SO_(2)选择性吸附/解吸过程。本文介绍了制酸尾气和环集烟气可再生型离子液体脱硫系统的工艺原理、工艺流程、主要设备及运行情况,并针对生产运行中存在的设备腐蚀、系统堵塞、硫酸钠结晶等问题,经过多年的生产实践,通过工艺和设备的不断优化和改进,总结了采取阴离子型交换树脂为脱盐树脂、混装1 m~3弱碱性阴离子脱氯专用进口树脂、增设稀酸冷却器等设备,增加换热面积等一系列措施。该工艺绿色环保、成熟可靠、运行平稳,且副产物可回收利用,排放尾气中ρ(SO_(2))<100 mg/m~3,实现尾气SO_(2)超低排放,环保效益和经济效益显著。The paper introduces the process principle,process flow,main equipment and operation of ionic liquid desulfurization system for acid making tail gas and flue gas.Green renewable ionic liquid aqueous solution,dominated by organic cation and inorganic anion with an addition of little activator and anti-oxidant can be used as a desulfurization adsorbent,which can realize selective adsorption and desorption of SO_(2) in the flue gas.In view of the problems existing in the production and operation,such as equipment corrosion,system blockage,sodium sulfate crystallization,etc.,the paper summarized a series of measures through continuous optimization and improvement of the process and equipment after years of production practice.The measures comprise anionic type exchange resin as the demineralized resin,imported resin with mixed 1 m~3 weak base anion specifically for dechlorination,addition of equipment such as diluted acid cooler and increase of heat exchange area,etc.The process is green,mature,reliable and stable,and the by-products can be recycled and discharged into the tail gas ρ(SO_(2))<100 mg/m~3,realizing ultra-low emission of tail gas SO_(2),with remarkable environmental and economic benefits.

关 键 词：制酸尾气 环集烟气 脱硫 离子液体 腐蚀 堵塞 结晶 脱硫吸收剂 

分 类 号：TF811[冶金工程—有色金属冶金] X758[环境科学与工程—环境工程]