Process for making cement using low-grade fuels
    1.
    发明授权
    Process for making cement using low-grade fuels 失效
    使用低档燃料制造水泥的工艺

    公开(公告)号:US5336317A

    公开(公告)日:1994-08-09

    申请号:US29784

    申请日:1993-03-11

    CPC分类号: C04B7/43 C04B7/4446

    摘要: A process for producing cement, including preheating a mixture of ground raw materials (raw meal) in a preheating cyclone to form a preheated raw meal, calcining the preheated raw meal in a calciner to form a calcined raw meal, burning the calcined raw meal in a rotary kiln with the aid of a high-grade fuel to form a cement clinker, cooling the cement clinker in a rotary kiln and grinding the cooled cement clinker. The process is characterized by replacing 50 to 70% of the high-grade fuel with a low-grade fuel, gasifying the low-grade fuel in a fluidized bed to form a resulting fuel gas, supplying a first portion of the resulting fuel gas to a main burner of the rotary kiln, a second portion of the resulting fuel gas to the exhaust gas stream from the rotary kiln and a third portion of the resulting fuel gas to the calciner.

    摘要翻译: 一种用于生产水泥的方法,包括在预热旋风分离器中预热原料(生料)的混合物以形成预热的生料,在煅烧炉中煅烧预热的生料,形成煅烧生料, 借助于高级燃料形成水泥熟料的回转窑,在回转窑中冷却水泥熟料并研磨冷却的水泥熟料。 该方法的特征在于用低等级燃料代替50%至70%的高级燃料,在流化床中气化低级燃料以形成所产生的燃料气体,将所得燃料气体的第一部分供应到 回转窑的主燃烧器,所产生的燃料气体的第二部分与来自回转窑的废气流和所得燃料气体的第三部分转移到煅烧炉。

    Shut-off device
    4.
    发明授权
    Shut-off device 失效
    关闭装置

    公开(公告)号:US5014744A

    公开(公告)日:1991-05-14

    申请号:US468474

    申请日:1990-01-22

    IPC分类号: B65D90/58 F16K5/06

    摘要: In a housing having an inlet opening and an outlet opening, the shut-off mechanism has a rotary plug for interrupting the flow of flowable material through the housing. Via the rotary plug the outlet opening is gas-tightly sealed and a flow of material through the inlet opening is prevented. The rotary plug is provided with a sealing member, which is rotatable about an axis which is approximately at right angles to the axis of rotation of the rotary plug. The sealing member cooperates with the valve seat, which is associated with the outlet opening. A compression spring extends between the sealing member and the rotary plug and is laterally spaced from the axis of rotation of the sealing member. Upon a movement of the rotary plug the compression spring will impart a certain rotation of the sealing member without a need for a drive.

    摘要翻译: 在具有入口开口和出口的壳体中,切断机构具有用于中断可流动材料通过壳体的流动的旋转塞。 通过旋转塞,出口开口被气密密封,并且防止了通过入口开口的材料流。 旋转塞具有密封构件,该密封构件可围绕大致与旋转塞的旋转轴线成直角的轴线旋转。 密封构件与与出口开口相关联的阀座协作。 压缩弹簧在密封构件和旋转塞之间延伸并且与密封构件的旋转轴线横向间隔开。 在旋转塞的移动时,压缩弹簧将赋予密封构件一定的旋转,而不需要驱动。