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Compound filter material for high-temperature flue gas bag-type dust removal system and preparation method of same

A bag-type dust removal and high-temperature flue gas technology, applied in separation methods, chemical instruments and methods, filtration and separation, etc., can solve the problems of short service life of filter bags, poor high-temperature impact resistance, high thermal shrinkage, etc., and achieve service life Long, cost-effective, high-temperature strength stability and good dimensional stability

Active Publication Date: 2013-01-16
AFCHINA CORP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the aramid fiber 1313 filter material widely used in the cement and steel industry has a long-term service temperature of 204°C. When the flue gas temperature exceeds 210°C, the product has a high thermal shrinkage rate, poor high-temperature impact resistance, and a short service life of the filter bag. High resistance to system operation

Method used

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  • Compound filter material for high-temperature flue gas bag-type dust removal system and preparation method of same
  • Compound filter material for high-temperature flue gas bag-type dust removal system and preparation method of same
  • Compound filter material for high-temperature flue gas bag-type dust removal system and preparation method of same

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preparation example Construction

[0027] The present invention also provides a method for preparing the composite filter material for the above-mentioned high-temperature flue gas bag-type dust removal system, comprising a step of pretreatment of polysulfone fiber, in the step of pretreatment of polysulfone fiber, Spray evenly on the polysulfone fibers with antistatic oil, balance for 4-10 hours; include a step of preparing a base fabric woven from blended yarns of polysulfone fibers and aramid fibers; include a step of preparing polysulfone fibers and aramid fibers The step of mixing fibers, in the step of preparing the mixed fibers of polysulfone fiber and aramid fiber, making the mixed fiber of polysulfone fiber and aramid fiber through an air-laid process; The upper and lower sides of the base fabric are respectively stacked with sulfonamide and aramid mixed fiber layers, and the preliminary pre-needling step also includes a step of passing at least two spunlaces to form a plain felt, and also includes a de...

Embodiment 1

[0034] A composite filter material for a high-temperature flue gas bag-type dust removal system. The upper and lower surfaces of the base fabric 1 woven from polysulfonamide and aramid blended yarns are reinforced by air-laid and needle-punched / spunlace Combining the composite process symmetrically punctures the mixed fiber layer of aramid sulfone fiber and aramid fiber.

[0035] The polysulfone fiber and aramid blended yarn comprises 20 parts by weight of the polysulfone fiber and 80 parts by weight of the aramid 1313 fiber, and the parts by weight are based on the polysulfone fiber and the aramid fiber in the blended yarn. A total of 100 parts by weight of Lun 1313 fiber.

[0036] The mixed fiber of polysulfone and aramid contains 20 parts by weight of polysulfone fiber and 80 parts by weight of aramid 1313 fiber, and the parts by weight are based on the content of polysulfone fiber and aramid 1313 in the mixed fiber. 100 parts by weight of fibers in total.

[0037] A comp...

Embodiment 2

[0044]A composite filter material for a high-temperature flue gas bag-type dust removal system. The upper and lower surfaces of the base fabric 1 woven from polysulfonamide and aramid blended yarns are reinforced by air-laid and needle-punched / spunlace Combining the composite process symmetrically punctures the mixed fiber layer of aramid sulfone fiber and aramid fiber.

[0045] The polysulfone fiber and aramid blended yarn comprises 50 parts by weight of the polysulfone fiber and 50 parts by weight of the aramid 1313 fiber, and the parts by weight are based on the polysulfone fiber and the aramid fiber in the blended yarn A total of 100 parts by weight of Lun 1313 fiber.

[0046] The mixed fiber of polysulfone and aramid contains 50 parts by weight of polysulfone fiber and 50 parts by weight of aramid 1313 fiber, and the parts by weight are based on the content of polysulfone fiber and aramid 1313 in the mixed fiber. 100 parts by weight of fibers in total.

[0047] A compos...

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Abstract

The invention provides a compound filter material for a high-temperature flue gas bag-type dust removal system and a preparation method of the compound filter material, belongs to the field of the chemical industry and solves the technical problems of high heat shrinkage, poor high temperature impact resistance, high system running resistance and short service life of a filter bag of a bag-type of a filtering material product of a bag-type dust collector. The compound filter material comprises a base fabric, wherein the base fabric is formed by weaving polysulfonamide and aramid blended yarns; a dust facing surface formed by polysulfonamide and aramid mixed fibers is arranged on the upper surface of the base fabric; a bottom layer formed by the polysulfonamide and aramid mixed fibers is arranged on the lower surface of the base fabric; and the dust facing surface, the base fabric layer and the bottom layer are connected by closing splinters. The preparation method disclosed by the invention comprises a process of compounding the air-laid and acupuncture / hydroentangle combination base fabric with the polysulfonamide and aramid mixed fibers. The filter material disclosed by the invention has high strength; the high temperature strength stability and the high temperature size stability of the filter material disclosed by the invention are obviously superior to those of an aramid filter material; and the compound filter material resists to the impact of 250 DEG C to 280 DEG C high temperature flue gas and the impact of high temperature particles.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a filter material, in particular to a composite filter material for a high-temperature flue gas bag-type dust removal system and a preparation method thereof. Background technique [0002] The bag type dust collector uses a three-dimensional porous filter medium to separate and capture dust in the gas. At present, bag filter is widely used in electric power, steel, cement, non-ferrous metals, road construction, garbage incineration and many other fields. Different flue gas working conditions put forward new requirements for filter material of bag filter. [0003] In the engineering application of bag filter, the thermal shrinkage rate of the filter material is an important index to evaluate the thermal dimensional stability of the filter bag. The filter bag is set on the bag cage. If the thermal shrinkage rate of the filter bag in the high temperature flue gas is too...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/08B01D46/02B32B27/02B32B33/00B32B7/08B32B37/02B32B38/00B32B38/16
Inventor 王锋华殷庆永王琛张光旭曹静
Owner AFCHINA CORP CO LTD
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