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    • 2. 发明授权
    • Power plant with centrifugal separators for returning material from
combustion gases to a fluidized bed
    • 具有离心分离器的发电厂,用于将燃料气体返回到流化床
    • US4730563A
    • 1988-03-15
    • US16706
    • 1987-02-20
    • Per Thornblad
    • Per Thornblad
    • F23C10/18B01J8/00F22B31/00F23C10/08F23C10/16F23J15/02F23J3/00
    • F22B31/0084B01J8/005F23C10/08F23C10/16F23J15/027
    • A power plant with combustion of a fuel in a fluidized bed (14) enclosed within a combustion chamber in a bed vessel (11). A gas outlet from the bed vessel (11) is formed as a centrifugal separator (20) intended to primarily separate coarse material containing unburnt fuel leaving the bed (11) together with the combustion gases. Suitably the separator (20) extends into the bed vessel (11) and separated material is returned to the bed (14) through a return conduit (34), which is preferably located close to the bed vessel wall. This conduit (34) opens into the bed vessel (11), near the bottom (12) thereof. For the return transport an ejector (35) may be used to overcome the pressure difference existing between the separator (20) and the orifice of the conveying conduit (34). The propellent gas may consist of combustion air from the space (16). If the pressure difference between the space (16) and the orifice of the return tube (34) is insufficient to obtain the necessary driving power, a booster compressor (36) may be used to increase the pressure of the propellent gas.
    • 一种燃料在动力装置中,该燃料在封闭在床容器(11)中的燃烧室内的流化床(14)中燃烧。 形成来自床容器(11)的气体出口作为离心分离器(20),其用于主要与燃烧气体一起分离含有离开床(11)的未燃燃料的粗材料。 适当地,分离器(20)延伸到床容器(11)中,并且分离的材料通过返回导管(34)返回到床(14),返回导管优选位于靠近床容器壁的位置。 该导管(34)在其底部(12)附近通向床容器(11)。 为了返回运输,可以使用喷射器(35)来克服存在于分离器(20)和输送管道(34)的孔口之间的压力差。 推进气体可以由来自空间(16)的燃烧空气组成。 如果空间(16)与返回管(34)的孔口之间的压力差不足以获得必要的驱动力,则可以使用增压压缩机(36)来增加推进气体的压力。