Method of fuel gasification and an apparatus for performing such a method
    1.
    发明授权
    Method of fuel gasification and an apparatus for performing such a method 失效
    燃料气化方法和执行这种方法的装置

    公开(公告)号:US5676713A

    公开(公告)日:1997-10-14

    申请号:US635285

    申请日:1996-04-19

    摘要: In fuel gasification, particles of, for example, coal and an oxidant are supplied to a reactor, where the coal particles are gasified. The gas thus produced may contain molten slag entrained therein and such slag could subsequently solidify and affect other components of the coal gasification apparatus. Therefore a molten slag cooling heat exchanger is positioned directly above the reactor and this cools the gas so as to cause any molten slag therein to solidify. Hence, such molten slag does not reach an evaporator above the molten slag cooling heat exchanger, so that the efficiency of the evaporator will be maintained. However, solidified molten slag may build up on heat exchange tubes of the molten slag cooling heat exchanger. Therefore, the rate of coolant supplied to the molten slag cooling heat exchanger is varied, to cause expansion and contraction which causes solidified slag to be dislodged. Hence the efficiency of the molten slag cooling heat exchanger does not deteriorate. Cleaning gas and coal particles may be jetted onto the evaporator to dislodge ash or soot therefrom.

    摘要翻译: 在燃料气化中,将例如煤和氧化剂的颗粒供给到煤颗粒气化的反应器中。 由此产生的气体可能含有夹带在其中的熔渣,并且这种炉渣随后可能固化并影响煤气化装置的其它组分。 因此,熔渣冷却热交换器直接位于反应器上方,并且冷却气体,以使其中的任何熔融炉渣固化。 因此,这种熔渣不会在熔渣冷却热交换器上方到达蒸发器,从而保持蒸发器的效率。 然而,固化的熔融炉渣可能积聚在熔渣冷却热交换器的换热管上。 因此,提供给熔渣冷却热交换器的冷却剂的比例变化,引起膨胀和收缩,这导致固化的炉渣脱落。 因此,熔渣冷却用热交换器的效率不会降低。 可以将清洁气体和煤颗粒喷射到蒸发器上以从其中排出灰分或烟灰。