Glass-fluorine complex fire resistant filter material and method for manufacturing same

A technology of filter material and manufacturing method, which is applied in the field of high-temperature-resistant composite filter material and its manufacturing, can solve the problems of non-stickiness of polytetrafluoroethylene, blockage of filter material pores, poor high-temperature resistance, etc., and achieve easy dust removal , Stable structure, good anti-oxidation effect

Inactive Publication Date: 2008-08-20
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] As in the invention reported above, most of the filter materials are bonded or coated with polytetrafluoroethylene film on the non-woven base cloth, which does not completely overcome the technical defects caused by the non-stickiness and easy deformation of polytetrafluoroethylene. It is easy to cause blockage of the filter material pores, and the process is difficult and the high temperature resistance is poor, thus limiting its use as a filter material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Use neutral glass fiber woven cloth (450 grams per square meter), and polytetrafluoroethylene fiber nets that have been opened, mixed, and carded to form a net, and laminated together, and composited with spunlace. together. Dipping and rolling with polytetrafluoroethylene emulsion to make the amount of liquid to be 80%, and then drying and setting at 125°C.

[0028] The specification of the obtained glass-fluorine composite high-temperature-resistant filter material is 500 grams per square meter, the maximum use temperature is 300°C, and the long-term use temperature is 260°C. Strength: radial 1000 (N / 2.5cm), weft 800 (N / 2.5cm). The filtration efficiency is 97.83%, the filtration resistance is 19.33Pa, and the wear times are 929 times.

Embodiment 2

[0030] Alkaline glass fiber woven cloth (490 grams per square meter) is laminated with polytetrafluoroethylene fiber nets that have been opened, mixed, and carded into a net, and they are composited using a spunlace process. together. Dipping and rolling with polytetrafluoroethylene emulsion to make the amount of liquid taken up to 150%, and then drying and setting at 175°C.

[0031] The specification of the obtained glass-fluorine composite high-temperature-resistant filter material is 550 grams per square meter, the maximum use temperature is 300°C, and the long-term use temperature is 260°C. Strength: radial 1100 (N / 2.5cm), latitude 900 (N / 2.5cm), filtration efficiency 92.12%, filtration resistance 20.48Pa, abrasion resistance 931 times.

Embodiment 3

[0033] Alkaline glass fiber woven cloth (400 grams per square meter) is laminated with polytetrafluoroethylene fiber nets that have been opened, mixed, and carded into a net, and they are composited using a spunlace process. together. Dipping and rolling with polytetrafluoroethylene emulsion to make the amount of liquid to be 60%, then drying and setting at 200°C.

[0034] The obtained glass-fluorine composite high-temperature-resistant filter material has a specification of 510 grams per square meter, a maximum service temperature of 300°C, and a long-term use temperature of 260°C. Intensity: radial 1000 (N / 2.5cm), weft 820 (N / 2.5cm), filtration efficiency 89.54%, filtration resistance 18.45Pa, abrasion resistance 911 times.

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PUM

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Abstract

The invention relates to a glass-fluoride composite high temperature resistance filtering material and a corresponding manufacture method, the filtering material comprises a special high temperature resistant fiberglass woven fabric and a polytetrafluoroethylene fiber net; the manufacture method comprises a plurality of steps as followings: processing polytetrafluoroethylene short fiber to obtain the polytetrafluoroethylene fiber net through the technologies of opening, mixing, carding and web forming, folding the special high temperature resistant fiberglass woven fabric and the polytetrafluoroethylene fiber net together, further compounding the two materials with a technology of spun-laced, then finishing and setting after dew prevention at last. The filtering material has the advantages of high mechanical strength, low elongation, good oxidation resistance, better high temperature resistant ability, filtration velocity, filtering precision and service life than glass fiber membrane filter media, main application in steel factory, cement factory and chemical factory.

Description

technical field [0001] The invention belongs to the technical field of filter materials, in particular to a high-temperature-resistant composite filter material and a manufacturing method thereof. Background technique [0002] High temperature resistant filter material is a kind of needle felt filter material, with high temperature resistance, working temperature above 160 ℃, commonly used in coal-fired boiler dust removal, cement kiln, blast furnace gas, steel blast furnace, garbage incineration, Filtration of high temperature chemical gas. Common preparations are generally two types: simple needle-punched felt and needle-punched felt after post-treatment or lamination. The filter material prepared by simple needle-punched felt is not ideal for high temperature resistance, low filtration accuracy, and low mechanical strength. not tall. [0003] At present, the patent applications for high-temperature resistant filter materials obtained after post-treatment or lamination o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/16
Inventor 靳向煜章倩王富军吴海波殷保璞章悦庭陈涵胡炜汪小颖屠晓东
Owner DONGHUA UNIV
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