Novel composite filter net for air purifier and preparation method thereof

An air purifier and filter technology, which is applied in the filter field, can solve the problems of short service life and large filter resistance, and achieve the effects of long service life, small filter resistance and corrosion prevention

Active Publication Date: 2017-11-03
丁海军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a novel composite filter screen for air purifiers and its preparation method, to solve the deficiencies in the prior art, not only to overcome the current problems of larger filter resistance and shorter service life of composite filter screens for air purifiers, It can also improve the catalytic activity and further reduce the production cost

Method used

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  • Novel composite filter net for air purifier and preparation method thereof
  • Novel composite filter net for air purifier and preparation method thereof
  • Novel composite filter net for air purifier and preparation method thereof

Examples

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preparation example Construction

[0024] A preparation method of a composite filter screen for a novel air purifier, comprising the steps of:

[0025] (1) Etching the surface of the base layer, firstly configure an lye solution with a pH of 9 to 11 (one or more mixtures of sodium carbonate, sodium bicarbonate, sodium hydroxide, potassium carbonate, potassium bicarbonate, and potassium hydroxide) , and then immerse the stainless steel wire mesh in it, and treat it in a water bath at 60-80 °C for 2-6 hours to remove impurities such as oil stains covered on its surface, and then spray and wash it with clean water until the pH of the washing wastewater reaches 7.0 ~7.2 is enough, then it is transferred to 0.05 ~ 0.20moL / L Fe 3+ (Fe(NO 3 ) 3 , Fe 2 (SO 4 ) 3 , FeCl 3 ) or Cu 2+ (Cu(NO 3 ) 2 , CuSO 4 , CuCl 2 ) solution in a water bath at 40 to 70 °C for 3 to 6 hours, so as to engrave the surface and facilitate the subsequent modification of the surface of the substrate layer;

[0026] (2) Modifying the ...

Embodiment 1

[0030] A preparation method of a composite filter screen for a novel air purifier, comprising the steps of:

[0031] (1) First, configure a sodium carbonate solution with a pH of 10, then immerse the stainless steel wire mesh in it, and treat it in a water bath at 60 °C for 4 hours to remove impurities such as oil stains covered on its surface. It is then washed with water spray until the pH of the washing water is close to neutral. It was then transferred to 0.05moL / L Cu(NO 3 ) 2 The solution was treated in a water bath at 40°C for 6h;

[0032] (2) The stainless steel wire mesh was then transferred to the hydrothermal reactor, and 20wt% aluminum sol solution was added to it and treated under hydrothermal conditions at 110°C for 24h. The obtained filter screen was washed with water and dried at 120°C for 4h. Then transfer to 400 ℃ for 6h calcination, so as to support a layer of Al on its surface 2 O 3 coating, wherein the loading of the coating on the surface of the stain...

Embodiment 2

[0035] A preparation method of a composite filter screen for a novel air purifier, comprising the steps of:

[0036] (1) First configure potassium bicarbonate solution with pH 9, then immerse the stainless steel wire mesh in it, and treat it in a water bath at 80°C for 2 hours to remove impurities such as oil stains on its surface, and then spray it with clean water. until the pH of the washing water is close to neutral, then it is transferred to 0.20 moL / L Fe(NO 3 ) 3 The solution was treated in a water bath at 70°C for 3h;

[0037] (2) The stainless steel wire mesh was then transferred to a hydrothermal reactor, and a 35wt% silica sol solution was added to it and treated under hydrothermal conditions at 130°C for 12h. The obtained filter screen was washed with water and dried at 110°C for 4h. It was then transferred to 600 °C for 4 h to support a layer of SiO on its surface. 2 coating, wherein the loading of the coating on the surface of the stainless steel wire mesh is 1.4...

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Abstract

The invention provides a novel composite filter net for an air purifier and a preparation method thereof. The novel composite filter net comprises a matrix layer, a transition layer and an active layer, the matrix layer is a stainless steel wire net after going through etching treatment, the transition layer is loaded on the surface of the matrix layer and is chosen from an aluminum oxide coating and a silicon dioxide coating or a composite coating of the two, and the active layer is arranged on the outermost layer of the composite filter net, loaded on the surface of the transition layer and composed of titanium dioxide, ammonium sulfide and bismuth tungstate. By the novel composite filter net, the problem that existing composite filter nets for the air purifier are high in filtering resistance and short in service life is solved, catalytic activity can be improved, and production cost is further lowered.

Description

technical field [0001] The invention relates to the field of filter screens, in particular to a novel composite filter screen for an air purifier and a preparation method thereof. Background technique [0002] Indoor is one of the most frequent and close environments for people, and its quality directly affects people's health. Volatile organic compounds (formaldehyde, toluene, benzene, etc.) and bacteria, viruses, dust, PM2.5, etc. are important components of indoor air pollutants, which have diversity, potential, comprehensiveness, extensiveness, accumulation, etc. Features. To reduce indoor air health risks, the use of air purifiers is one of the most effective means. In the current air purifier market, HEPA filters with fine glass fibers as filter media dominate. However, its filtration resistance is large and its service life is short, which affects the use effect. [0003] The invention patent CN2014107286164.6 discloses a PTFE microporous membrane composite filter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D46/00B01D39/20B01D53/86B01D53/44
CPCB01D39/20B01D46/0001B01D53/8687B01D2239/0407B01D2239/0414B01D2239/1216B01D2255/915B01D2257/708B01D2258/06B01D2275/10
Inventor 魏亮
Owner 丁海军
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