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Inorganic-fiber ultra-high temperature composite filter material

A technology of inorganic fiber and composite filtration, which is applied in the direction of filtration and separation, chemical instruments and methods, separation methods, etc., can solve the problems that the felt surface is separated from the base cloth, is not easy to bend, and is not easy to clean dust, so as to overcome poor cohesion, high The effect of filtering wind speed and prolonging the service life

Active Publication Date: 2009-12-30
南京际华三五二一环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional filter materials are basically manufactured by needle-punching method. Due to the smooth appearance and poor cohesion between traditional pure basalt or ceramic fiber felts, the peeling strength of needle-punched felts is too low, and "flying felt" appears. The phenomenon of detachment from the base cloth not only affects the service life of the needle felt, but also limits the improvement of the filtration wind speed
Stainless steel fibers are pure metal fiber felts, which are hard, not easy to bend, and difficult to clean; ceramic sintered filter materials are not easy to popularize due to their high cost and difficulty in self-cleaning.
[0003] In order to overcome the problems existing in the prior art, the object of the present invention is to provide a kind of inorganic fiber ultra-high temperature composite filter material, which overcomes the shortcomings of poor cohesion and low peel strength between traditional pure basalt or ceramic fiber mats, It also overcomes the shortcomings of pure metal fiber felt, which is hard and not easy to bend. It has strong cohesion, can withstand higher filtering wind speed, and has a long service life.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Inorganic-fiber ultra-high temperature composite filter material
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  • Inorganic-fiber ultra-high temperature composite filter material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] An inorganic fiber ultra-high temperature composite filter material, the preparation method is as follows:

[0018] 1. Use basalt fiber filaments with a diameter of 7μ, interweave warp and weft yarns, and process them into 420g / m 2 Gram-weight base cloth layer 1. Blend stainless steel staple fibers with basalt fibers, the ratio is 10% of metal fibers, and form 150g / m after opening and carding 2 Stainless steel composite fiber felt layer 2.

[0019] 2. At a high temperature of 1500°C, the metal fibers are melted and welded on the warp and weft interweaving points of the base fabric by melting and sintering to form joints, thereby forming a uniform and compact ultra-high temperature basalt fiber composite felt.

[0020] Performance comparison table 1

[0021]

[0022] As can be seen from Table 1, the product of the present invention has high breaking strength, and the peeling strength is more than 6 times that of common basalt needle felt. The anti-filtration wind ...

Embodiment 2

[0024] Another inorganic fiber ultra-high temperature composite filter material, the preparation method is as follows:

[0025] 1. Use ceramic fiber filaments with a diameter of 7μ, interweave warp and weft yarns, and process them into 560g / m 2 Gram-weight base cloth layer 1. The short stainless steel fiber and ceramic fiber are blended, the proportion is 30% of the metal fiber, after opening and carding, it is formed into 100g / m 2 The metal composite fiber felt layer, that is, the stainless steel composite fiber felt layer 2.

[0026] 2. At a high temperature of 1500°C, the metal fibers are melted and welded on the warp and weft interweaving points of the base fabric to form joints through the melting and sintering method, thereby forming a uniform and compact ultra-high temperature basalt fiber composite felt.

[0027] Performance comparison table 2

[0028]

[0029] As can be seen from Table 2, the product of the present invention has high breaking strength, and the p...

Embodiment 3

[0031] Another inorganic fiber ultra-high temperature composite filter material, the preparation method is as follows:

[0032] 1. Use short ceramic fibers with a diameter of 7μ, interweave warp and weft yarns, and process them into 330g / m 2 Gram-weight base cloth layer 1. The short stainless steel fiber and ceramic fiber are blended, the proportion is 20% of the metal fiber, after opening and carding, it is 250g / m 2 Stainless steel composite fiber felt layer 2.

[0033] 2. At a high temperature of 1500°C, the metal fibers are melted and welded on the warp and weft interweaving points of the base fabric to form joints through the melting and sintering method, thereby forming a uniform and compact ultra-high temperature basalt fiber composite felt.

[0034] Performance comparison table 3

[0035]

[0036] As can be seen from Table 3, the product of the present invention has high breaking strength, and the peeling strength is more than 9 times that of ordinary ceramic fibe...

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Abstract

The invention discloses an inorganic-fiber ultra-high temperature composite filter material comprising a base cloth layer and felt layers. The base cloth layer is arranged between the two felt layers and is made of inorganic fiber; the felt layers are made of stainless steel composite filter; the inorganic fiber is basalt fiber or ceramic fiber; and the stainless steel composite filter is formed by mixing stainless steel fiber and the basalt fiber or the stainless steel fiber and the ceramic fiber, wherein the proportion of the stainless steel fiber is 10-30 percent. The stainless steel fiber is melted and sintered at a high temperature so that the stainless steel fiber is welded on crossing points of warp yarn and weft yarn of base cloth to form nodes and accordingly form a sintered filter felt. The invention effectively improves the anti-filtration airspeed capability, the fracture strength and the peeling strength of the filter material, prolongs the service life and satisfies the requirements of the ultra-high temperature flue gas abatement field.

Description

technical field [0001] The invention relates to an ultra-high temperature flue gas dust removal filter material, in particular to an inorganic fiber ultra-high temperature composite filter material. Background technique [0002] At present, the filter materials for high-temperature flue gas mainly include aramid, PPS (polyphenylene sulfide), P84 (polyimide), PTFE (polytetrafluoroethylene), etc. Inorganic fibers such as basalt fibers, ceramic fibers, and stainless steel fibers are used for ultra-high temperature flue gas dust removal above 600 °C. However, conventional filter materials are basically manufactured by needle-punching method. Due to the smooth appearance and poor cohesion between traditional pure basalt or ceramic fiber felts, the peeling strength of needle-punched felts is too low, and "flying felt" appears. The phenomenon of detachment from the base cloth not only affects the service life of the needle felt, but also limits the improvement of the filtration wi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/20
Inventor 于淼涵刘江峰刘建祥张明华
Owner 南京际华三五二一环保科技有限公司
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