Research Progress on Resource Utilization Technology for Domestic Waste Incineration Fly Ash
As China's urban waste management technology gradually shifts towards full-volume incineration,the proper disposal of the resulting significant quantities of municipal solid waste incineration fly ash has posed a significant challenge for the prevention and control of current environmental risks.The synergistic disposal of heavy metals,dioxins and soluble salts contained in fly ash is the focus and difficulty in its treatment process.Currently,based on the end-use methods of fly ash,the treatment technologies can be divided into three categories:solidification/stabilization,heat treatment and cement kiln synergism.This paper proposes a multi-technology fly ash treatment technology of low-temperature pyrolysis coupled with water washing and salt separation,which is based on the analysis of the existing process principles and their advantages and disadvantages.The solid-phase catalytic pyrolysis equipment,which induces the decomposition of organic contaminants such as dioxins under an inert atmosphere of adiabatic oxygen,and simultaneously isolated industrial grade potassium and sodium salts,can provide useful guidance for improving the efficiency of fly ash treatment to recover resources and maximise its value.
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维普
