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    • 8. 发明授权
    • Process and apparatus for preparing dust-free granular material
    • 制备无尘颗粒材料的方法和设备
    • US4832700A
    • 1989-05-23
    • US628806
    • 1984-07-09
    • Jan KasparPierre Schmid
    • Jan KasparPierre Schmid
    • B01J2/00B01J2/04B01J2/16C09B67/00F26B3/08F26B3/12F27B15/08
    • C09B67/0094B01J2/16C09B67/0095F26B3/08F26B3/12F27B15/08
    • A fluidized bed apparatus comprises a chamber having a perforated floor, a spray nozzle located in the chamber above the perforated floor, whereby material to be granulated is introduced into the chamber in the form of a solution or dispersion, means for passing heated gas upward through said perforated floor, whereby solid particles of said material are formed in said chamber, particle size-reducing means outside of said chamber, whereby particles larger than a first predetermined size are reduced in size, a screw shaft located above said perforated floor and communicating with said size-reducing means, whereby particles are withdrawn from said chamber and conveyed to said size-reducing means, a pipe having one end located downstream of said size-reducing means and its other end communicating with said chamber, and means for generating a flow of air whereby particles smaller than a second predetermined size exiting from said size-reducing means are returned through said pipe to said chamber.
    • 流化床装置包括具有多孔底板的腔室,位于穿孔底板上方的腔室中的喷嘴,由此将要造粒的材料以溶液或分散体的形式引入腔室,用于将加热气体向上通过的装置 所述穿孔的地板,由此在所述室中形成所述材料的固体颗粒,所述室内的颗粒尺寸减小装置,由此大于第一预定尺寸的颗粒尺寸减小,位于所述多孔板上方的螺杆轴与 所述尺寸减小装置,其中颗粒从所述室中取出并被输送到所述减小尺寸的装置,管的一端位于所述尺寸减小装置的下游,并且其另一端与所述室连通,以及用于产生流动的装置 的空气,由此从所述尺寸减小装置出来的小于第二预定尺寸的颗粒通过所述管返回到所述c 哈伯