HEATING FLUIDIZED BED REACTOR

摘要

PURPOSE:To heat moisture selectively and efficiently without any limitation at all in geometrical shape such as heat transfer area by providing a microwave generating means for heating a fluidized bed which heats and dehydrates moisture-contg. materials to be treated to said fluidized bed. CONSTITUTION:For example, in denitration reaction of used nuclear fuel, UO3 powder is put into a vessel 1 and a fluidized bed A is formed. When air is supplied from a line 2 into the bed A and raw uranyl nitrate liquid is atomized and supplied from a spray nozzle 7, the mists stick on the UO3 powder. On the other hand, microwaes are being supplied from an irradiation part duct 12 to the inside of the bed A and therefore the stuck mists are heated and the moisture and NOx therein evaporate. The waste gas including these is removed of the fine UO3 powder carried therein while ascending and is released into the atmosphere. On the other hand, the UO3 powder is increased of grain sizes by the UO3 formed on the surfaces thereof and is recovered from a line 3.