Fluidized bed combustor

A fluidized bed combustor which comprises:

• a hollow body containing a combustion chamber and regeneration chamber formed by vertically partitioning said hollow body by a partition wall;
• a perforated plate provided at the bottom of said combustion chamber and a perforated plate provided at the bottom of said regeneration chamber;
• a particulate solid heat transfer medium containing a combustion gas desulfurizing agent means that will associate with the sulfur of sulfur oxide gas to produce a sulfur-containing medium, said medium to be fluidized and arranged on each of said perforated plates;
• means for feeding fuel to said combustion chamber;
• means for feeding air for combustion of the fuel and fluidization of said heat transfer medium to said combustion chamber to form a fluidized bed of said heat transfer medium in said combustion chamber;
• means for feeding a gas that will cause disassociation of said combined sulfur from said medium and produce a sulfur-containing gas for regeneration of said heat transfer medium and fluidization of said heat transfer medium to said regenerating chamber to form a fluidized bed of said heat transfer medium in said regeneration chamber;
• gas-discharging port means provided at the upper part of said combustion chamber for discharging products of combustion of said fuel and gas-discharging port means provided at the upper part of said regeneration chamber for discharging said sulfur-containing gas;
• said partition wall having an upper opening and a lower opening;
• said lower opening being located in the vicinity of said perforated plates;
• means for transferring said heat transfer medium from said combustion chamber through said lower opening to said regeneration chamber;
• and said upper opening being located above the level of said fluidized bed formed in said combustion chamber and below the level of said fluidized bed in said regeneration chamber so that said heat transfer medium containing desulfurizing agent means can overflow through said upper opening and recycle from said regeneration chamber to said combustion chamber.