A superfine powder trapping device for fluidized bed granulation system

Abstract

The invention relates to the technical field of one-step granulation, and specifically discloses an ultrafine powder trapping device used in a fluidized bed granulation system. The filter is placed on the hole and fixed to the top of the fluidization chamber. There is a nozzle in the center of the hole, and the other end of the nozzle is connected to a compressed air pulse blowback device. The titanium rod filter has a pore size of 0.1-10 µm, which can Realize the effective barrier of ultra-fine dust, reduce the material leakage, and improve the material balance yield; the nozzle penetrates into the rod body of the titanium rod filter, and the compressed air passes through the nozzle located inside the rod body of the titanium rod filter. The dust accumulated on the titanium rod filter is dusted off, thereby improving the granulation efficiency of the powder.

Description

technical field [0001] The invention relates to the technical field of one-step granulation, and more specifically relates to an ultrafine powder collection device used in a fluidized bed granulation system. Background technique [0002] Fluidized bed granulation, also known as boiling granulation, refers to the use of airflow to suspend the powder material in a boiling state, and then spray the binder to make the powder granulate, and finally obtain dry granules. Granulation and drying are completed at the same time, so it is also called one-step granulation. [0003] One-step granulation system is generally composed of dust collection system, spray fluidization chamber, raw material container, control system and other parts. The traditional dust collection system generally consists of a dust-proof bag and a bag vibrator. The dust-proof bag is used to collect the solid powder carried in the exhaust gas, and the bag vibrator dusts the solid powder back for granulation throu...

AI Technical Summary

Problems solved by technology

[0004] With the rise of modern ultrafine pulverization technology, the overall particle size of raw and auxiliary materials after ultrafine pulverization is mostly less than 45µm, of which the particle size is 0.1µm-10µm accounting for more than 20%, and 10µm-30µm accounts for 60%. As mentioned above, for this kind of raw material powder after micronization treatment, because its particle size is too small, if a conventional dust collection device is used for granulation, the powder is easily entrained by the air flow, and the solid powder carried by the exhaust gas will pass through. The pore size of the dust-proof bag is discharged, resulting in large material loss, low granulation efficiency, low granulation rate, material consumption, energy consumption, and labor consumption, which affect the performance and practical application of the final product of ultrafine powder. Therefore, it is necessary to improve the existing There is a dust collection device in the one-step granulation system, so that it can realize efficient granulation of micronized powder

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