Fly ash particles generated by a plasma municipal waste incinerator ash volume reduction system

In order to reduce bottom and fly ash volumes and detoxicity of ashes, a thermal plasma ash melting volume reduction system was recently developed and the first commercial plants have been constructed at Matsuyama City Minami Clean Center, Japan, to treat 52 tons of ashes per day from 390 tons of municipal waste per day. Two plasma torches are used as a heat source and melting ashes are automatically fed down from the waste furnaces. Slag generated from the ash melting furnace is water crushed and the fly ashes are collected by bag filters. Fly ashes collected by bag filters are analyzed by scanning electron microscope (SEM) and neutron activation analyses (NAA).