To provide a waste disposal power reactor of a method particularly suitable for efficiently generating electric power with incineration treatment of industrial waste mixed with an unburnable sold material, capable of rationally reducing fuel consumption, capable of exhausting environmental-friendly, and suitable for effective use of incineration ashes including a solid material.

An exhaust gas receiver is arranged outside an exhaust gas port of a rotary kiln. A power generation device and a dust collector for cleaning exhaust gas, are successively connected to the exhaust gas receiver via a secondary combustion chamber for completely burning exhausted incomplete combustion gas. While, a cooling system of the discharged incineration ashes and a heat exchanger for heating water by heat received from the incineration ashes in response to cooling, are arranged outside an ash outlet of the incineration ashes. The power generation device is composed of the heat exchanger for transmitting the exhaust gas from the secondary combustion chamber to a heating medium, a steam generator for boiling hot water by the heating medium, and a generator for driving a turbine by its steam, and a pipe from a heating water device is connected to the steam generator so as to provide steaming hot water.

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