To permit the separating removal of matters deposited in the surface of fluidized substances, a heat transfer tube or the inner wall of a furnace easily within a short period of time, in the layer circulation fuidized bed combustion of combustibles containing CI compound and Ca compound.
In layer circulation fluidized bed combustion method, a combustion fluidized bed 12, burning combustibles, containing chlorine compounds, together with calcium compound, and heat recovering fluidized bed 44, recovering heat, are provided while fluidized substances are circuited between both of the fluidized beds. A moisture concentration in fluidizing gas in the heat recovering fluidized bed 44 is retained so as to be higher than the moisture connection during normal operation temporarily to react moisture to deposited matters, deposited on the fluidizing substances, to produce hydrate while cracks are produced in the hydrate due to the expansion of the hydrate and separate the leisured matters from the fluidizing substances.
MORIOKA SHUICHI
OKADA ZENSHI
KUBO YUKIO
SHIBATA TAISUKE
MORIMOTO KATSUYA
