A gasifying apparatus comprises a gasifier, a reformer and a heating
device. The gasifier produces a thermal decomposed gas with use of a
thermal decomposition reaction of a liquid or solid fuel such as waste or
coal, and the heating device heats a low-temperature steam and air so as
to be a high-temperature steam and air, which have a temperature equal to
or higher than 700 deg. C. The gasifying apparatus has feeding means
including fluid passages for feeding the high-temperature steam and air to
the gasifier and the reformer. In a thermal decomposition area of the
gasifier, the liquid or solid fuel is thermally decomposed to produce the
thermal decomposed gas with sensible heat of the high-temperature steam
and air and with the heat generated by an exothermic oxidation reaction
between the high-temperature air and the liquid or solid fuel. In the
reformer, the thermal decomposed gas is reformed in the existence of the
high-temperature steam so as to be a high-temperature syngas. The steam
reforming reaction of the liquid or solid fuel is carried out with an
exothermic reaction between the high-temperature air and hydrocarbon
contained in the thermal decomposed gas and with an endothermic reaction
between the hydrocarbon and the high-temperature steam.
