Fluidized bed waste incinerators remain popular for industrial waste incineration, although the demand for these incinerators has been decreasing for municipal waste incineration. This is partly because the release of dioxins from waste incineration has recently become a significant social problem in Japan. NKK has continually improved fluidized bed technology to solve the dioxin problem, as well as to obtain heat recovery from waste combustion. Our most recently delivered fluidized bed incinerator for municipal waste incorporated these improvements and achieved very low dioxin concentrations of 0.00058ng(TEQ)/Nm3 at the stack. This result is equivalent to that of very large-scale stoker type incineration plants. Furthermore, NKK developed technology for effectively recovering heat from the furnace bed to achieve highly efficient power generation. The estimated corrosion rate of the furnace bed boiler tubes is as low as 0.4mm/year.

Fluidized bed incinerator, industrial waste, municipal waste,dioxin, heat recovery, corrosion, feeder, boiler tube, sus310s, 625 alloy