Fluidized bed process and apparatus for carrying out the process
    3.
    发明授权
    Fluidized bed process and apparatus for carrying out the process 失效
    流化床工艺和进行该工艺的设备

    公开(公告)号:US4917028A

    公开(公告)日:1990-04-17

    申请号:US217529

    申请日:1988-07-11

    摘要: The invention concerns a fluidized bed process for the gasification and combustion of fuels in differently fluidized zones separate from one another, the fuel being charged into a drying and pyrolysis zone with lower fluidization and solids transport downwards, the solids conveyed downwards being conveyed from the lower part of the drying and pyrolysis zone to the lower part of a combustion zone with higher fluidization and solids transport upwards and recirculating, after passing the combustion zone, from the upper zone thereof to the drying and pyrolysis zone, comprising that the solids are conveyed upwards in a combustion zone operated as a fast or turbulent fluidized bed beyond the bed height in the drying and pyrolysis zone and are subsequently forcibly deflected so that the solids drop down on the surface of the bed in the drying and pyrolysis zone as a shower of particles, that the fuel is metered into the shower of particles and that the gases emerging from the combustion zone are passed under use of their flowing pulse, optionally together with the gases rising from the drying and pyrolysis zone, into a turbulence zone in which a post-combustion is carried out, and further an apparatus for carrying out said process, said apparatus being a fluidized bed reactor with bed material circulating between two differently fluidized zones which are connected to one another in their lower parts, said reactor having a guidance means for the faster combustion zone extending in height beyond the slower bed material circulating zone and on whose upper end a solids deflection means for generating a shower of bed material dropping down on the slower zone is provided, comprising that a fuel feed is provided in the dropping area of the shower of bed material.

    摘要翻译: 本发明涉及用于在不同流化区域彼此分离的燃料的气化和燃烧的流化床方法,将燃料装入干燥和热解区域,其中较低的流化和固体向下传输,向下传送的固体从下部传送 干燥和热解区的一部分到燃烧区的下部,其具有较高的流化和固体向上运送并且在通过燃烧区之后再循环从其上部区到干燥和热解区,包括向上输送固体 在作为干燥和热解区域中的床高度的快速或湍流流化床作用的燃烧区中,随后被强制偏转,使得固体在干燥和热解区域的表面上落下,作为颗粒的淋浴 ,燃料被计量到淋浴的颗粒和从燃烧区域出来的气体 使用它们的流动脉冲,任选地与从干燥和热解区域升起的气体一起进入到其中进行后燃烧的湍流区域,以及进一步执行所述方法的装置,所述装置是 流化床反应器,其中床材料在两个不同流化区之间循环,两个不同流化区在它们的下部彼此连接,所述反应器具有引导装置,用于在较慢的床材料循环区中高度延伸的较快燃烧区,并且其上端a 提供了用于产生在较慢区域上下落的床料淋浴的固体偏转装置,包括在床材料淋浴的滴落区域中设置燃料供给。