垃圾焚烧飞灰等离子熔融过程中二[口恶]英的控制技术  

Control Technology of Dioxin in Plasma Vitrification Process of Waste Incineration Fly Ash

作　　者：胡明 虎训 徐鹏程 郭斌 肖诚斌 王云刚 赵彬 陈勇[2] 袁浩然[2] 温宗国[4] HU Ming;HU Xun;XU Pengcheng;GUO Bin;XIAO Chengbin;WANG Yungang;ZHAO Bin;CHEN Yong;YUAN Haoran;WEN Zongguo(Everbright Environmental Research Institute(Shenzhen)Co.Ltd.,Shenzhen 518000,China;Guangzhou Institute of Energy Conversion,Chinese Academy of Science,Guangzhou 510640,China;China Institute of Recycling Economy,Beijing University of Technology,Beijing 100124,China;School of Environment,Tsinghua University,Beijing 100084,China)

机构地区：[1]光大环保技术研究院(深圳)有限公司,深圳518000 [2]中国科学院广州能源研究所,广州510640 [3]北京工业大学循环经济研究院,北京100124 [4]清华大学环境学院,北京100084

出　　处：《工业加热》2022年第11期54-58,共5页Industrial Heating

基　　金：国家重点研发计划项目(2018YFC1903003)。

摘　　要：为了有效控制垃圾焚烧飞灰等离子熔融过程中的二[口恶]英排放,对飞灰中二[口恶]英的含量及分布特性进行了详细的分析,并在此基础上对二[口恶]英的分解控制技术进行了中试试验研究。结果表明,在熔融温度1400℃下,等离子体的高温和高能量能促使飞灰中的二[口恶]英分解率达到99.93%以上;添加10%Na_(2)CO_(3)/K_(2)CO_(3)能使熔融产生的二次飞灰和排放烟气中的二[口恶]英含量降低约40%和30%;熔融气氛对飞灰熔融过程二[口恶]英降解有一定影响,还原性气氛下二次飞灰和排放烟气中的二[口恶]英含量低于氧化性气氛;飞灰水洗预处理脱氯后,熔融产生的二次飞灰和排放烟气中的二[口恶]英含量分别降低了82%和80%以上;此外,飞灰水洗过程重金属污泥入炉熔融会增加二[口恶]英的二次合成。In order to effectively control the dioxin emission in the plasma vitrification process of waste incineration fly ash,the content and distribution characteristics of dioxin in fly ash were analyzed in detail,and on this basis,the pilot test of dioxin decomposition control technology was carried out.The results show that the high temperature and high energy of plasma can promote the decomposition rate of dioxin in fly ash to more than 99.93%at the melting temperature of 1400℃.The addition of 10% Na_(2)CO_(3)/K_(2)CO_(3) can reduce the content of dioxin in secondary fly ash and flue gas by about 40%and 30%.The content of dioxin in secondary fly ash and flue gas in reducing atmosphere is lower than that in oxidizing atmosphere.After dechlorination of fly ash by water washing pretreatment,the content of dioxin in secondary fly ash produced by melting and discharged flue gas can be decreased by more than 82%and 80%respectively.In addition,the melting of heavy metal sludge in the process of fly ash washing will increase the secondary synthesis of dioxin.

关 键 词：垃圾焚烧飞灰 等离子熔融 二[口恶]英 添加剂 水洗预处理 

分 类 号：X075[环境科学与工程]