Dedusting technique and device thereof

Abstract

The invention relates to a process and a device for dedusting, in particular suitable for dedusting in the production process of tablet coating. The dedusting process comprises: dust produced in the coating process of a coating machine is transported to air feeding equipment, enters the dedusting device from the air feeding equipment, and is discharged through an exhaust fan, wherein the dedusting process comprises wet dust filtering and dry dust filtering; firstly, the dust is subjected to the wet dust filtering; and subsequently, the dust is subjected to the dry dust filtering. The dedusting device comprises a box body, a draught fan and a nonwoven fabric filter bag; the box body is provided with an air inlet and an air outlet; a dust fluid is filtered by the filter bag from the air inlet, and is discharged from the air outlet, wherein the upper part of the air inlet in the box body is horizontally at interval provided with two or more than two filter screen layers; the lower part of the air inlet inside the box body is provided with a cone body of which peripheral wall surfaces contract downwards; a hollow cavity is formed between the upper part of the cone body and the filter screen layer; the bottom of the cone body is provided with a dust cleaning valve; and the air outlet is provided with the nonwoven fabric filter bag. The device does not occupy a production field, and has good filtering effect and high production efficiency.

Description

technical field [0001] The invention relates to a dedusting process and a device thereof, in particular to a dedusting process for dedusting in the tablet coating production process and a dedusting device matched with the process. Background technique [0002] In the production process of film coating in the tablet workshop of pharmaceutical factory, a large amount of water mist coating material dust will be produced, and the state of these dust will gradually change from semi-solid to solid during the production process and be inhaled by the dust collector. The specific dust removal process such as figure 1 It is shown as a traditional dust removal process flow chart; the coating dust is sent to the coating machine by the blower, and the dust generated by the coating machine during the coating process is directly sent to the dust removal device for dust removal. Such as Figure 5 As shown in the structural diagram of the existing dust collector device, the dust removal de...

AI Technical Summary

Problems solved by technology

However, due to the strong viscosity of the raw materials for coating, and the state of the dust changes during the production process, the filter bag will be blocked soon

[0003] In actual production, a batch of coating process takes about 3.5 hours, but the non-woven filter bag in the existing dust collector is blocked in about 1.5 hours, which affects the entire coating process and cannot be carried out normally.

Therefore, within 3.5 hours of a batch of coating, the filter bag has to be replaced twice, which greatly reduces the production efficiency of the tablet coating process and affects the quality of the tablet coating

A large amount of coating materials are discharged into the air due to unsatisfactory filtration in the existing dust collector

These raw materials are colored, causing a large area of ​​colored pollution

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