Characteristics and influence mechanisms of chlorine existence in municipal solid waste/waste PCB co-incineration bottom slag
The co-incineration of municipal solid waste(MSW)with general industrial solid waste is recognized as a crucial development trend in the waste incineration industry.However,the impact of co-incineration on chlorine distribution within incineration slag remains poorly understood.This study,using a typical industrial printed circuit board(PCB)as the experimental material,investigates the co-incineration process of MSW and waste PCBs.The migration behavior,chemical forms,and long-term stability of chlorine in slag samples under varying waste compositions were determined.The research examines the migration behavior,chemical forms,and long-term stability of chlorine in slag samples under varying waste compositions.The findings demonstrate that the high-temperature decomposition of glass fibers in waste PCBs results in the retention of volatile chlorine in the slag due to the fibers'large specific surface area.This leads to an overall increase in total chlorine content within the slag,with the proportion of plastics in the waste mixture significantly influencing this process.The water-soluble chlorine content in the co-incinerated slag samples ranged from 50 to 70wt％.Dynamic leaching results revealed that the residual chlorine rate in most slag samples was below 40％.However,as the proportion of waste PCBs increased,the chlorine residue ratio in the slag rose,peaking at 45.6％.This indicates that co-incineration reduces chlorine leaching from the slag.
municipal solid wastewaste PCBincinerationincineration bottom slagchlorine
万方数据
维普
