STEAM GENERATOR AND STEAM VOLUME CONTROL METHOD

PROBLEM TO BE SOLVED: To control the output volume of steam constantly by supplying water to sand when a matter having low quantity of heat is thrown in to be burnt and robbing latent heat of the sand through vaporization of water thereby keeping a constant quantity of heat in an incinerator. SOLUTION: Sand S packed on the bed of an incinerator 1 is brought into fluid state by supplying primary air and garbage W is thrown onto it from a garbage feeder 2. A boiler 3 being heated by the combustion heat of the garbage W the combustion heat of garbage to drive a generator is disposed above the a sintering 1 and supplied with secondary air for burning the garbage W. On the other had, water M is sprayed onto the sand by a water supply means 4. Water in the water tube 3b of boiler is heated by the combustion heat of the garbage W to generate steam J in the boiler drum 3a. The steam J is subjected to flow rate regulation by a steam regulation valve 3c before being supplied to a generator. The valve 3c is provided, at the outlet thereof, with a sensor 3 for detecting the flow rate of the steam J being delivered fro the boiler 3 to the generator based on the output volume of steam (f) and the output from the sensor 3 is delivered to a controller 5.