垃圾和污泥共燃过程中重金属的赋存迁移规律  

The Occurrence and Migration Mechanism of Heavy Metal During the Co-combustion of Municipal Solid Waste and Sludge

作　　者：霍小华[1] 

机构地区：[1]山西大学工程学院,山西太原030013

出　　处：《锅炉技术》2013年第5期75-78,共4页Boiler Technology

摘　　要：采用热力学平衡计算方法,研究了垃圾和污泥焚烧过程Cu、Mn、Zn重金属的迁移规律,考察了温度、HCL、S以及焚烧中污泥水分高低对重金属迁移特性的影响。研究结果表明:除焚烧温度外,HCl是影响重金属迁移的主要因素,HCl的存在会促进难挥发重金属(Cu、Zn)低温时就挥发出来;污泥含水率的降低会增加氯化锌的挥发量,但影响较小,含水率由72%降至12%,氯化锌百分含量增加不到5%。The migration mechanism of Cu, Mn, Zn during the co-combustion of solid waste and sludge are studied based on the thermodynamic equilibrium method. The influence of temperature, chlorine, sulfur and moisture content of sludge on the migration mechanism has been researched. The results show that： besides the temperature, chlorine is the main factor that influences the migration of heavy metal, and the existence of chlorine promotes the volatilization of Cu and Zn at low temperatures~ the moisture content of sludge has little affect on the volatilization of Zn, while it decreases from 72% to 12~, the volatilization increases less than 5 %.

关 键 词：垃圾 污泥 重金属 热力学平衡 

分 类 号：X701.3[环境科学与工程—环境工程]