Filter device for separating gas and solid

A technology of gas-solid separation and filtration device, which is applied in the direction of dispersed particle filtration, separation method, and dispersed particle separation, etc. It can solve problems such as plugging holes, high energy consumption, and unsatisfactory cleaning effect of backflushing airflow.

Active Publication Date: 2014-09-10
CHENGDU RUIKELIN ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Filter device for separating gas and solid
  • Filter device for separating gas and solid
  • Filter device for separating gas and solid

Examples

Experimental program
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Embodiment 1

[0020] The blast furnace gas is filtered by using the filter device in the above specific embodiment. Wherein the bag body of the filter bag is composed of the expanded polytetrafluoroethylene membrane and the inner tank made of glass fiber woven cloth. The thickness of the liner is only 0.3 mm, its longitudinal tensile strength is 570KN / m, and its transverse tensile strength is 410KN / m. The filter bag 130 has a length of 1 meter and a diameter of 300 mm. There is neither an anti-flat ring nor a supporting structure such as a bag cage on the filter bag. The pulling force applied by each elastic pulling device to the corresponding filter bag is set at 25 kg. During normal filtration, the gas to be filtered enters the raw gas chamber 140 from the air inlet 111, and then enters the clean gas chamber 150 through the filter bag under the filtration pressure, and the filtered gas is discharged from the exhaust port 112; when the filter bag surface is attached After a certain thic...

Embodiment 2

[0022] The blast furnace gas is filtered by using the filter device in the above specific embodiment. Wherein the bag body of the filter bag is composed of the expanded polytetrafluoroethylene membrane and the inner tank made of glass fiber woven cloth. The thickness of the liner is 0.5 mm, its longitudinal tensile strength is 580KN / m, and its transverse tensile strength is 430KN / m. The filter bag 130 has a length of 12 meters and a diameter of 300 millimeters. An anti-flat ring 131 is arranged on the filter bag. The pulling force applied by each elastic pulling device to the corresponding filter bag is set at 40 kg. During normal filtration, the gas to be filtered enters the raw gas chamber 140 from the air inlet 111, and then enters the clean gas chamber 150 through the filter bag under the filtration pressure, and the filtered gas is discharged from the exhaust port 112; when the filter bag surface is attached After a certain thickness of dust, the blowback device 160 ac...

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Abstract

The invention discloses a filter device which not only can prevent the collision of outer-filter filter bags, but also can improve the ash clearing effect for the filter bag, and is used for separating gas and solid. The filter device comprises a box body, wherein a porous plate is installed in the box body, a plurality of filter units are installed on the porous plate, each filter unit comprises the outer-filter filter bag with an open upper end and a closed lower end, the upper end of the filter bag is installed on the porous plate, an original gas chamber is arranged below the porous plate in the box body, a purified gas chamber is arranged above the porous plate in the box body, the box body is provided with a gas inlet which is communicated with the original gas chamber and an exhaust port which is communicated with the purified gas chamber, a back-flushing device for clearing the ash of each filter bag through the back-flushing airflow is arranged above the box body, the lower end of each filter bag is connected with an elastic drawing device which is used for stretching the filter bag in the axial direction, and the elastic drawing device is connected and elastically tensioned between the filter bag and a fixed component which is arranged below the filter bag and keeps a set distance from the porous plate. By adopting the filter device, the service life of the filter bag can be prolonged, and the ash clearing effect for the filter bag can be improved.

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 ...

Claims

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Application Information

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IPC IPC(8): B01D46/06B01D46/54
Inventor 谭险峰
Owner CHENGDU RUIKELIN ENG TECH
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