Filtration device for gas-solid separation

Abstract

The invention discloses a filter device for gas-solid separation which can prevent mutual collision between outer filter bags and improve the effect of cleaning the filter bags. The device includes a box body, and a hole plate is installed in the box body, and a plurality of filter units are arranged on the hole plate, and each filter unit includes an outer filter bag with an open upper end and a closed lower end, and the upper end of the filter bag is Installed on the orifice plate, the box is located below the orifice plate as the original air chamber, and above the orifice plate is the clean air chamber. The air port, above the box body is provided with a blowback device for cleaning each filter bag by recoil air flow, and the lower end of the filter bag is connected with an elastic pulling device that makes the filter bag axially tensioned. The device is connected and stretched elastically between the filter bag and the fixing member below the filter bag which keeps a set distance from the orifice plate. The above-mentioned device can improve the service life of the filter bag and the effect of cleaning the filter bag.

Description

technical field [0001] The invention relates to a filter device for gas-solid separation. Background technique [0002] In the field of gas-solid filtration and separation, external filter bags are commonly used filter elements. The so-called "outer filter type" refers to the filter method in which the gas to be filtered penetrates from the outside of the filter bag to the inside of the filter bag to achieve gas-solid separation and purification. The filter device using an external filter bag generally has the following structure: the filter device includes a box body, and an orifice plate is installed in the box body, and a plurality of filter units are arranged on the orifice plate, and each filter unit includes an open upper end and a closed lower end. External filter bag, the upper end of the filter bag is installed on the orifice plate, the lower end of the filter bag is suspended, and the inside of the filter bag is also equipped with a bag cage to support the filter ...

AI Technical Summary

Problems solved by technology

[0003] The main disadvantages of the above-mentioned filter device are as follows: First, the material used in the filter bag itself has a relatively large pore size, and when filtering, it mainly relies on the filter cake layer formed by the dust gradually accumulated on the surface of the filter bag to ensure a certain filtration efficiency (i.e. Dust removal rate), and the dust on the surface of the filter bag can easily enter the pores of the filter bag material to cause plugging. Therefore, the backflushing device usually has to act on the high-pressure recoil airflow of 0.1 to 0.8 MPa for the filter bag, which not only consumes energy High, and the cleaning effect of the recoil airflow is not ideal; second, the filter bag and the bag cage are caused to rub against each other when the high-pressure recoil airflow is cleaned, which leads to the wear of the filter bag over time; The filter bag swings back and forth to cause the filter bags to collide with each other, resulting in damage to the filter bag and leakage at the seal between the filter bag and the orifice plate

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