HEAVY METAL CONCENTRATION AND BASICITY CONTROL METHOD FOR INCINERATION ASH, AND SYSTEM FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a heavy metal concentration and basicity control system for incineration ash, which surely control the heavy metal concentration and the basicity of the incineration ash to be subjected to a melting treatment. SOLUTION: The system comprises an incineration ash analyzing unit 2 analyzing the basicity and heavy metal concentration of a part of the incineration ash of waste Kmdischarged from an incinerator 11, an ash reservoir device 4 provided with a plurality of ash reservoir tanks reserving the incineration ash taken out from a screw conveyer 3, an incineration ash return device 6 returning to the incinerator 11 the incineration ash discharged from each of the ash reservoir tanks of the ash reservoir device 4, which does not satisfy at least one of the conditions of the heavy metal concentration and the basicity obtained by the analysis by the incineration ash analyzing unit 2, and an incineration ash feeding device 8 feeding the incineration ash satisfying both the basicity and the heavy metal concentration to a melting furnace 14. COPYRIGHT: (C)2008,JPO&INPIT