新型干法脱酸物料研磨投加系统在生活垃圾焚烧烟气净化中的应用  

作　　者：王东 王荣建 乐俊超 

机构地区：[1]上海东石塘再生能源有限公司,上海201417

出　　处：《环境保护与循环经济》2024年第8期18-21,共4页environmental protection and circular economy

摘　　要：传统生活垃圾焚烧干法烟气净化工艺,存在脱酸效率低、设备易堵塞的问题。针对常规氢氧化钙干法加湿法处理的局限性,开发了一种新型氢氧化钙研磨投加系统,通过细化氢氧化钙的颗粒度,提高其与烟气中酸性气体的接触效率,从而提升脱酸效果。运行结果表明,在维持原有的烟气脱酸效率前提下,提升氢氧化钙细度后,其在烟气中的反应率显著提高,从不超过60%增至85%以上,有效减少了氢氧化钙的使用量,预计年综合节约成本20万—50万元。该技术还降低了维护成本和操作难度,预计在维持原有脱酸效率的同时,年飞灰处理成本可降低50万—100万元。该系统对环境影响较小,技术成熟,提供了一种有效提升生活垃圾焚烧烟气干法脱酸效率的新工艺。Traditional dry flue gas purification processes in municipal solid waste incineration have been hampered by low deacidification efficiency and equipment clogging issues.Addressing the limitations of conventional dry and semi-dry processes using calcium hydroxide,this study introduces a novel grinding and feeding system for calcium hydroxide.By refining the particle size of calcium hydroxide,the system significantly improves its contact efficiency with acidic gases in the flue gas,thereby enhancing the deacidification effect.Operational results indicate that while maintaining the original deacidification efficiency of flue gas,the reaction rate of calcium hydroxide in the flue gas significantly increased from no more than 60%to over 85%after improving its fineness.This enhancement effectively reduces the usage of calcium hydroxide,with an estimated annual cost savings of RMB 200000 to 500000 Yuan.Furthermore,the technology also lowers maintenance costs and operational complexity.It is anticipated that the annual cost for fly ash treatment could be reduced by 500000 to 1000000 Yuan while maintaining the original deacidification efficiency.This process system has low environmental impact and mature technology,offering an effective new method for enhancing the efficiency of dry flue gas deacidification in municipal solid waste incineration.

关 键 词：生活垃圾 烟气净化 氢氧化钙 脱酸 

分 类 号：X701.2[环境科学与工程—环境工程]