Ultramicro powder trapping device for fluidized bed granulation system

Abstract

The invention relates to an ultramicro powder trapping device for a fluidized bed granulation system, which belongs to the technical field of granulation. The ultramicro powder trapping device is such structured that a hole is formed in the top of a spray fluidization chamber; a titanium rod filter is placed in the hole and fixed on the top of the fluidization chamber; the central part of the hole is provided with a nozzle; the other end of the nozzle is connected with a compressed-air pulse-jet cleaning unit; and the bore diameter of the titanium rod filter is 0.1 to 10 [mu]m. The ultramicro powder trapping device realizes effective obstruction of ultramicro powder, reduces run-off of a material and improves balanced yield of the material; the nozzle goes deep into a rod body of the titanium rod filter; and compressed air whisks dust adhered onto the titanium rod filter at fixed time through the nozzle in the rod body of the titanium rod filter, so granulation efficiency of powder is improved.

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 45 μm, of which the particle size is 0.1 μm ~ 10 μm, accounting for more than 20%, and 10 μm ~ 30 μm accounting 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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