WASTE TREATMENT APPARATUS AND METHOD

摘要

PROBLEM TO BE SOLVED: To make use of heat in a waste treatment apparatus by reusing waste as an energy source.

SOLUTION: A waste dried by a dryer is heated indirectly under a nearly oxygen deficient atmosphere in a kiln-type pyrolysis furnace to generate a pyrolysis gas which is decomposed under reducing atmosphere to lower hydrocarbons to produce a reformed gas. The reformed gas is desalted with a desalting agent, filtered with a bag filter and then subjected to washing by water and desulfurization with a desulfurizing agent to produce a purified gas which is used as a fuel of a gas engine to drive a power generator. The waste treating method comprises the above steps. The above reducing reformer gas produced under reducing atmosphere is supplied to a boiler to generate steam which is supplied to an air preheater to heat air. A fuel gas produced by mixing the heated air and the above purified gas is burned in a furnace to produce a high-temperature combustion gas. This combustion gas is mixed with an exhaust gas from the above gas engine to make a gas mixture of a specified temperature which is supplied to the above kiln-type pyrolysis furnace for indirect heating of a waste.

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