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Preparation method of PPS superfine fiber compound filter material

A technology of ultra-fine fiber and composite filter material, which is applied in separation methods, chemical instruments and methods, filtration separation, etc., and can solve the problems of low PM2.5 filtration efficiency, poor oxidation resistance, poor tolerance, and low dust emission concentration , to achieve the effect of improving anti-oxidation performance, reducing filtration resistance and reducing clogging

Active Publication Date: 2014-10-29
中科瑞阳膜技术(北京)有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the above-mentioned problems existing in the current PPS filter material, the purpose of the present invention is to provide a filter with good oxidation resistance, low filter resistance, low emission dust concentration, long service life, high filter efficiency, especially extremely high PM2.5 filter efficiency The preparation method of PPS ultrafine fiber composite filter material is to effectively solve the problems of low filtration efficiency of PM2.5 and poor oxidation resistance and tolerance under harsh industrial and mining conditions of conventional PPS fiber filter materials commonly used in the market, and improve PPS filtration. Filtration efficiency and service life of the material

Method used

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  • Preparation method of PPS superfine fiber compound filter material

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preparation example Construction

[0020] A preparation method of the PPS superfine fiber composite filter material according to the present invention, in which the dust facing surface adopts PPS / PET sea-island composite fiber and PTFE fiber blending, wherein the weight ratio of PPS / PET sea-island composite fiber is 40 -60%; the base fabric is made of 100% PTFE filament interwoven in warp and weft; the net air surface is made of 100% PPS fiber; the dust surface is made of PPS ultra- Composite needle-punched felt with fine fibers, and then through spunlace reinforcement and post-finishing treatment, is prepared into PPS ultra-fine fiber composite filter material; the specific steps are as follows:

[0021] (1) Open PPS / PET sea-island composite fibers and PTFE fibers respectively, and then mix the two fibers evenly;

[0022] (2) Combing and cross-lapping the uniformly mixed composite fiber web to form a dust-facing surface; the weight ratio of PPS / PET sea-island composite fibers in the dust-facing surface is 40-6...

Embodiment 1

[0031] The dust-facing surface is mixed with 2.2dtex PPS / PET sea-island composite fibers and 2.2dtex PTFE fibers to obtain a mixed fiber web, in which the proportion of PPS / PET sea-island composite fibers is 40%; the base fabric is made of 2.2dtex PTFE filaments interwoven in warp and weft; 2.2dtex PPS fiber mesh with 100% net air side; as above figure 1 Processing technology, made of PPS superfine fiber composite filter material. Among them, the mass concentration of NaOH in alkali treatment is 25g / L, the temperature of alkali solution is 100°C, and the heating time is 70min. It is washed 3 times with 5g / L HAc solution, rinsed with water for 5 times and baked at 105°C for 0.5h; spunlace reinforcement process The pressure of the water needle is: Spunlace head 1: Double-row needle board 50MPa, Spunlace head 2: Single-row needle board 80MPa, Spunlace head 3: Double-row needle board 150MPa, Spunlace head 4: Single-row needle board 160MPa, water Piercing head 5: single-row needle...

Embodiment 2

[0034]2.2dtex PPS / PET sea-island composite fiber and 2.2dtex PTFE fiber are mixed on the dust-facing surface to obtain composite fiber, in which the proportion of PPS / PET sea-island composite fiber is 50%; the base fabric is made of 2.2dtex PTFE filament warp and weft; The air surface is 100% 2.2dtex PPS fiber net; it is processed according to the above-mentioned figure to make PPS superfine fiber composite filter material. Among them, the mass concentration of NaOH in alkali treatment is 30g / L, the temperature of alkali solution is 110°C, and the heating time is 60min. It is washed 3 times with 5g / L HAc solution, rinsed with water for 5 times and baked at 105°C for 0.5h; spunlace reinforcement process The pressure of the water needle is: Spunlace head 1: Double-row needle board 55MPa, Spunlace head 2: Single-row needle board 85MPa, Spunlace head 3: Double-row needle board 155MPa, Spunlace head 4: Single-row needle board 165MPa, water Piercing head 5: single-row needle plate 1...

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Abstract

The invention discloses a preparation method of PPS superfine fiber compound filter material. According to the preparation method, the dust facing surface is formed by blending PPS / PET sea-island composite fiber and polytetrafluoroethylene PTFE fiber, wherein the weight proportion of the PPS / PET sea-island composite fiber is 40-60%; base cloth is formed by interweaving 100% PTFE filaments along warp and weft direction; the air purification surface adopts 100% PPS fiber; the method comprises the steps of preparing a compound needled felt provided with the dust facing surface containing PPS superfine fiber by a needle punching technology and an alkali treatment splitting and sanding technology, and carrying out spunlace reinforcement and after-finishing treatment to obtain the PPS superfine fiber compound filter material. According to the filter material, the PTFE filter and the PPS superfine fiber of the dust facing surface are closely interspersed and combined, so that the aperture is effectively reduced, the blockage caused by fine particulate matter can be reduced during filtering, the filtration resistance is reduced, the dust removal times are reduced, the oxidation resistance is improved, and the filtering efficiency is improved; the flue gas emission concentration is less than or equal to 1mg / m<3>, and the particulate matter (PM) 2.5 dust particle filtering efficiency reaches up to more than 99.99%.

Description

technical field [0001] The invention relates to a PPS filter material used in coal-fired power plants and chemical plants, in particular to a preparation method of a PPS superfine fiber composite filter material. Background technique [0002] With the increasingly severe domestic air pollution, the national industrial smoke emission concentration standards have gradually increased. In addition, the monitoring of PM2.5 in the new standard of "Ambient Air Quality Standard" is planned to be fully implemented in Beijing-Tianjin-Hebei, Yangtze River Delta, Pearl River Delta and other places in 2016. As a result, these emission standards have become more stringent on the performance requirements of filter materials used in factories of all walks of life. [0003] For conventional PPS fiber filter materials, the filtration efficiency of PM2.5 particles during flue gas dust removal is low, which cannot meet the requirements of high filtration efficiency; and the post-finishing meth...

Claims

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Application Information

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IPC IPC(8): B32B27/02B01D39/16D04H1/4382
Inventor 修俊峰粘伟诚吴晓青王山英李剑华苗贵菊
Owner 中科瑞阳膜技术(北京)有限公司
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