Device for treating powder particles by rotary flow

Abstract

The present invention relates to a rotating fluidized bed apparatus for powder particle. A gas circulation path is formed at the periphery of the treatment chamber 2 via the circumferential faceplate 202, 212, and the circumferential faceplate is adapted to rotate around an axis. Behavior of powder particles can be controlled by introducing gas from the periphery of the treatment chamber via the circumferential plate 212 to exert centripetal force on the powder particle, while exerting centrifugal force on the powder particles accompanying rotation of the circumferential plate 212. In another aspect, by making the arrangement proportion of the bag filter 5 inside the treatment chamber 2 wider than the surface width of the dispersion plate 212 or larger than the surface area of the dispersion plate 212, it is possible to cause gas that has flowed into the treatment chamber 2 to be discharged at a lower rate at an axial region inside the treatment chamber 2 where centrifugal force is weak and discharge rate is fast. It is possible to carry out optimal operation control of introduction and discharge of gas for fluidized bed behavior.

Description

technical field [0001] The present invention relates to a flow processing device for processing powder and granular body through mixing, granulation, coating, surface modification, drying, reaction, etc., especially relates to a flow processing device suitable for processing granular powder and granular body. Background technique [0002] Generally speaking, as a device that flows various gases or air into the processing chamber to mix, granulate, coat, dry or react powder or grain, there are known Figure 20 The fluidized bed device shown. [0003] This fluidized bed apparatus constitutes a frustoconical container 2A in which a distribution plate for ventilation (for example, a punched perforated plate) 3A is disposed on the bottom surface. When the device is used for powder drying, heated air flows into the container 2A from below the dispersion plate 3A to suspend and flow the powder 1A put into the container 2A, and at the same time perform drying. [0004] And when thi...

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Problems solved by technology

[0006] However, since the cohesiveness or adhesion will increase rapidly when the particle size of the material to be processed becomes small, the powder or grain cannot be uniformly flowed and dispersed in the fluidized bed device of the above-mentioned existing structure.

On the other hand, when the supply rate of heated air is increased to make it flow or disperse uniformly, it is extremely difficult to directly scatter fine powder particles out of the system, and it is impossible to control the formation of a good fluidized bed. question

Thus, in existing fluidized bed devices, there is a limit to substantial fluidized bed control due to the structure of the device itself

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