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Dust removal method and device for dust-containing gas

A gas and filter layer technology, applied in the environmental protection field of air pollution control, can solve the problems of easy aging of filter bags, difficult adaptation of cloth bags, clogging in the filtration process, etc. stable operation

Inactive Publication Date: 2019-11-15
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the electrostatic precipitator has high purification efficiency for dust-containing gas, small equipment resistance loss, and low total energy consumption, but the equipment is complex, expensive, requires high maintenance and management levels, and is selective for dust. certain danger
The bag dust collector has a simple structure and low cost, but the filter bag is easy to age and has a short life, and it is easy to cause blockage during the filtration process, especially for the dust removal of high-temperature gases, the bag is difficult to adapt

Method used

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  • Dust removal method and device for dust-containing gas
  • Dust removal method and device for dust-containing gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment is an embodiment of dedusting the high-temperature, wet and dust-laden gas with closed vaporization and coke quenching. Such as image 3As shown, the 300°C gas 5 (water vapor) containing dust particles 4 (coke powder particles) produced by spraying water on the red coke enters the dust removal device through the dust-containing gas inlet 7 on the dust removal device casing 15, and passes through the pressure. The coke powder is trapped in the tight filter layer 1, and the water vapor is discharged from the dust collector from the purified gas outlet 8 after passing through the filter layer. The filter layer is installed obliquely in the dust removal device, the dust-laden gas enters the lower part, and the purified gas is discharged from the upper part of the filter layer. The fixed porous pressing surface 2 is arranged on the side of the purified gas (the upper part of the filter layer), and the movable porous pressing surface 3 is arranged on the side...

Embodiment 2

[0032] This embodiment is an embodiment of using a filter layer composed of multi-layer wire mesh to remove dust from the dusty flue gas of a steelmaking furnace. The process is basically the same as in Example 1, except that the filter layer is composed of multi-layer wire mesh, the wire mesh is 200-mesh stainless steel mesh, and the outer side of the wire mesh is pressure-bearing with a punching plate. The high-temperature dust-laden flue gas at about 300 °C passes through the filter layer composed of stainless steel mesh to remove dust particles, and then the flue gas enters the heat recovery system. Dust removal adopts the combined form of water flushing with surfactant and air back blowing.

Embodiment 3

[0034] This embodiment is basically the same as Embodiment 1, except that the dust removal temperature for starch drying gas is 90±10°C, polyester filament is used as the filter material, and the pressing surface adopts a combined structure of outer punching plate and inner screen. Dust removal adopts the combination of gas back blowing mechanism 12 and vibration mechanism 11. After the starch drying gas is dedusted, it reaches the discharge standard and can run smoothly.

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Abstract

The invention relates to a dust removal method and device for dust-containing gas. When dust-containing gas passes through a compressible filter layer consisting of compressed compressible multilayerfilter materials, dust particles contained in the gas are intercepted by the compressible filter layer consisting of the compressed multilayer filter materials, and the gas passes through the filter layer to be discharged, so that dust removal is achieved. When dust accumulated on the surface of the filter layer or inside the filter layer is increased and dust cleaning is needed, compression of the filter materials is released, so that dust cleaning can be carried out on the compressible filter layer under a loose state. The compressible filter layer consisting of the multilayer filter materials is used for filtering in a compressed state, and dust cleaning is carried out under a loose state, so that high-precision filtering and high-efficiency dust cleaning are realized; compaction operation in a filtering process and loosening operation in a dust cleaning process are realized by utilizing a multilayer filament net or filaments to form the filter layer; dust cleaning efficiency and effects are improved through water washing, gas back blowing, vibration and combination of water washing, gas back blowing and vibration; and dust cleaning and dust collection are easier in a loose state through inclined arrangement of the filter layer.

Description

technical field [0001] The invention relates to a dust removal method and device for dust-containing gas, in particular to a method and device for dust removal in a compacted state and in a loose state by using a filter layer composed of compressible multi-layer filter materials, which belongs to air pollution control the field of environmental protection. Background technique [0002] Dust removal devices have been widely used in electric power, steel, water conservancy, chemical industry and other industries, and have played a great role in the control of dust content in the atmosphere. At present, the dust removal methods commonly used include electric dust removal, bag dust removal and so on. Among them, the electrostatic precipitator has high purification efficiency for dust-containing gas, small equipment resistance loss, and low total energy consumption, but the equipment is complex, expensive, requires high maintenance and management levels, and is selective for dus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D46/00B01D46/42B01D46/44
CPCB01D46/4227B01D46/44B01D46/70B01D46/76B01D46/71
Inventor 张书廷姜晴晴刘兴昕
Owner TIANJIN UNIV
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