脱硫石膏中氯含量偏高原因分析及对策研究  

Cause Analysis and Countermeasure Research on High Chlorine Content in Desulfurized Gypsum

作　　者：李勇辉 陈德霞 李波 何爱江[1] 黎亚 王姝 Li Yonghui;Chen Dexia;Li Bo;He Aijiang;Li Ya;Wang shu(College of New Materials and Chemical Energy,Yibin Vocational&Technical College,Yibin 64400,China)

机构地区：[1]宜宾职业技术学院新材料与化工能源学院,四川宜宾644000

出　　处：《云南化工》2022年第10期96-99,共4页Yunnan Chemical Technology

基　　金：宜宾职业技术学院项目(ybzysc19-46)。

摘　　要：针对脱硫石膏中氯含量偏高的情况,加强对脱硫石膏中氯离子含量的监测,并开展氯离子溯源、原因分析及对策研究。结果发现,脱硫原烟气中氯含量主要来自燃煤,煤燃烧过程中97%以上的氯随烟气进入脱硫系统。经吸收塔浆液吸收后,氯的协同脱除率可达90%以上,并富集于脱硫石膏、脱硫废水中,导致脱硫石膏中氯含量偏高。为降低脱硫石膏中氯离子含量,提升脱硫石膏品质等级,应加强入场煤、烟气、石灰石、工艺水、石膏浆液中氯离子含量的监测,并接入智能配煤掺烧系统、烟气脱硫系统DCS,适时调整优化脱硫工艺参数。High chlorine content in desulfurized gypsum was found,so chlorine content in desulfurized gypsum was monitored,traced back to the source,cause analysis and countermeasure research.The results showed chlorine content in desulfurized gypsum was mainly from coal,in coal combustion process,97 percent of chlorine with flue gas entered the desulfurization system,synergistic removal rate of chlorine was up to 90%by absorption tower slurry,and enriched in desulfurization gypsum and wastewater,caused finally high chlorine content in desulfurized gypsum.To reduce chlorine content and improve quality grade of desulfurized gypsum,strengthen monitoring of chlorine content in coal,flue gas,limestone,process water and slurry,and monitoring data was connected into intelligent blended coal combustion system and flue gas desulfurization distributed control system(DCS),timely adjust and optimize the process parameters were proposed.

关 键 词：烟气脱硫 脱硫石膏 氯离子含量 品质提升 

分 类 号：TQ177.37[化学工程—硅酸盐工业]