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    • 6. 发明授权
    • Method of and means for producing combustible gases from low grade solid
fuel
    • 从低档固体燃料生产可燃气体的方法和方法
    • US5388534A
    • 1995-02-14
    • US82818
    • 1993-06-28
    • Benjamin DoronDaniel GoldmanEli Yaffe
    • Benjamin DoronDaniel GoldmanEli Yaffe
    • C10L3/00C10B20060101C10B49/00C10B53/00C10B53/06C10F5/06C10G1/00C10G1/02C10J1/213C10L9/06C10L9/08F23B80/00F23B80/02F23B7/00
    • C10B53/06C10G1/002C10G1/02
    • Combustible gases are produced from a solid fuel by pyrolizing the fuel in a pyrolyzer containing a low grade solid fuel producing combustible gases, and carbonaceous material that is combusted in a furnace to produce hot products that include hot flue gases and particulate material. The hot products are separated into a plurality of streams, one of which contains comparatively coarse ash which is directed into the pyrolyzer for effecting the pyrolyzation of the fuel. A stream of reaction gases is applied to the pyrolyzer in such a way that the stream of reaction gases bubbles through the carbonaceous material in the pyrolyzer without fluidizing such material. In effect, the reaction gases activate the void fraction in the pyrolyzer thereby reducing the residence time of the material therein. In one embodiment of the invention, the combustible gas produced by the pyrolyzer is burned in a combustion chamber of a boiler that produces boiler flue gases which constitute the reaction gases applied to the pyrolyzer. In a further embodiment, the combustible products produced by the furnace are separated into a stream containing flue gases and ash. At least a part of the latter stream may constitute the reaction gases applied to the pyrolyzer.
    • 可燃气体由固体燃料通过在包含产生可燃气体的低等级固体燃料的热解器中进行热解,以及在炉中燃烧以产生包括热烟道气和颗粒材料的热产物的含碳材料来制造燃料。 热产物被分离成多个流,其中一个流含有比较粗的灰分,其被引入热解器中以实现燃料的热解。 反应气体流以这样的方式施加到热解器,使得反应气体流在热解器中气泡通过碳质材料,而不流化这种材料。 实际上,反应气体激活热解器中的空隙部分,从而减少材料在其中的停留时间。 在本发明的一个实施方案中,由热解器产生的可燃气体在锅炉的燃烧室中燃烧,该锅炉产生构成施加到热解器上的反应气体的锅炉烟道气。 在另一个实施方案中,由炉产生的可燃产物被分离成含有烟道气和灰分的物流。 后一流的至少一部分可构成施加到热解器的反应气体。