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    • 7. 发明授权
    • Composite recycling type fluidized bed boiler
    • 复合循环型流化床锅炉
    • US5156099A
    • 1992-10-20
    • US445679
    • 1989-11-29
    • Takahiro OhshitaShuichi NagatoNorihisa Miyoshi
    • Takahiro OhshitaShuichi NagatoNorihisa Miyoshi
    • F22B31/00F23C10/02F23G7/00
    • F22B31/0084F22B31/0092F23C10/02
    • An internal recycling type fluidized bed boiler in which a fluidized bed portion of the boiler is divided by a partition into a primary combustion chamber and a thermal energy recovery chamber, at least two kinds of air supply chambers are provided below the primary combustion chamber, one for imparting a high fluidizing speed to a fluidizing medium and the other for imparting a low fluidizing speed thereto, thereby providing a whirling and circulating flow to the fluidizing medium in the primary combustion chamber. The fluidizing medium is moved downward in a moving bed in the thermal energy recovery chamber. Thermal energy recovery from exhaust gas is effected in a free board portion or downstream thereof, the cooled exhaust gas being guided to a cyclone, and fine particulate char collected at the cyclone is returned directly above or into a descending moving bed of the fluidizing medium in the primary combustion chamber and/or the thermal recovery chamber, whereby the char will not be immediately scattered to the free board portion and the char is sufficiently precipitated and it is possible to reduce NOx generated by combustion of coal or the like, in the bed.
    • PCT No.PCT / JP89 / 00883 Sec。 371日期:一九八九年十一月二十九日 102(e)1989年11月29日PCT PCT 1989年8月30日PCT公布。 出版物WO90 / 02293 日本1990年8月3日。一种内部回收型流化床锅炉,其中锅炉的流化床部分被隔板分成初级燃烧室和热能回收室,至少提供两种供气室 在主燃烧室下面,一个用于赋予流态化介质高的流化速度,另一个用于赋予低流化速度,从而为主燃烧室中的流化介质提供旋转和循环流。 流化介质在热能回收室的移动床中向下移动。 废气中的热能回收在自由板部分或其下游进行,冷却后的废气被引导至旋风分离器,并且在旋风分离器处收集的细小颗粒焦炭直接返回到流化介质的下降移动床的上方或下方 主燃烧室和/或热回收室,由此该焦炭不会立即散布到自由板部分,并且焦炭充分沉淀,并且可以减少床等中燃烧产生的NOx 。