复合脱酸剂用于垃圾焚烧烟气脱酸的可行性分析  

Feasibility Analysis on Mixed Deacidifying Agent for the Deacidification of MSW Incineration Flue Gas

作　　者：穆小占 郭涛 李萍 王建伟 MU Xiaozhan;GUO Tao;LI Ping;WANG Jianwei(Tianjin Eman Environmental Technology Co.Ltd.,Tianjin 300392;Daen(Tianjin)Environmental Testing Co.Ltd.,Tianjin 300392)

机构地区：[1]天津壹鸣环境科技股份有限公司,天津300392 [2]大恩(天津)环境检测有限公司,天津300392

出　　处：《环境卫生工程》2023年第2期82-87,共6页Environmental Sanitation Engineering

摘　　要：生活垃圾焚烧烟气脱酸时,采用钙基脱酸剂很难通过调控其喷入量达到调节后续飞灰pH的作用。由此,阐述了复合脱酸剂代替常规钙基脱酸剂用于垃圾焚烧烟气脱酸的可行性。分别从复合脱酸剂的脱酸效果、对模拟飞灰浸出液pH的影响、对飞灰重金属浸出浓度的影响、对脱酸工艺的影响以及成本等方面进行了分析。结果表明:在烟气脱酸过程中,当消石灰和缓冲剂按照质量比1∶1、2∶1、3∶1、4∶1配比时,通过调控复合脱酸剂的添加量,既能达到良好的脱酸效果又能从源头调控飞灰的组分,使飞灰浸出液的pH维持在弱碱性范围,降低了飞灰重金属浸出浓度,减少后续飞灰稳定化处置费用。In the deacidification of MSW incineration flue gas,it was difficult to control the pH of subsequent fly ash by controlling the amount of injection calcium deacidifying agent.So the feasibility of using mixed deacidifying agent substitute calcium deacidifying agent in the deacidification of MSW incineration flue gas was expounded.The deacidification effects of mixed deacidifying agent,impact on the pH of simulated fly ash leaching solution,impact on the heavy metals leaching concentration of fly ash,impact on the deacidification process,as well as the material cost were analyzed respectively.The results showed that in the process of deacidification of flue gas,when the mass ratio of hydrated lime and buffering agent were 1∶1,2∶1,3∶1 and 4∶1,by changing the adding amount of mixed deacidifying agent,good deacidification effect could be achieved and the components of fly ash could be controlled from the source,which made the pH of fly ash leaching solution to be slightly alkaline.In this way,the heavy metals leaching concentration of fly ash was reduced and the subsequent stabilization disposal cost of fly ash was reduced.

关 键 词：垃圾焚烧飞灰 复合脱酸剂 消石灰 重金属 

分 类 号：X701[环境科学与工程—环境工程] X799.3