Multi-layer composite filtering net for HEPA filter

A multi-layer composite and filter technology, applied in the direction of dispersed particle filtration, chemical instruments and methods, separation methods, etc., can solve the problems of low filtration efficiency, inability to remove formaldehyde, short service life, etc., and achieve high filtration efficiency and efficient removal , a wide range of effects

Active Publication Date: 2015-10-21
ZHEJIANG ZHIYUAN ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current HEPA filter has problems such as low filtration efficiency, short service life, and inability to effectively remove formaldehyde.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]A. Prepare activated carbon-supported formaldehyde scavenger, which consists of the following components by weight percentage: activated carbon-supported manganese oxide 8g, 5,5-dimethylimidazolidine-2,4-dione 8g, activated carbon-supported titanium dioxide 8g, nano-silver colloid 0.1g, 75.9g of pure water.

[0039] The preparation process is as follows:

[0040] (1) Take activated carbon-supported titanium dioxide and nano-silver colloid of the formula amount and add them to 35.9g pure water, mix and stir for 30 minutes to obtain a mixed solution;

[0041] (2) Take the activated carbon-loaded manganese oxide and 5,5-dimethylimidazolidine-2,4-dione in the formulated amount and add them to 40 g of pure water, stir evenly to obtain a mixed solution;

[0042] (3) Add the mixed solution obtained in step (2) to the mixed solution obtained in step (1), and stir for 30 minutes to obtain the finished product.

[0043] B. Apply activated carbon-loaded formaldehyde scavenger to ...

Embodiment 2

[0046] According to the method described in Example 1, 5,5-dimethylimidazolidine-2,4-dione was replaced by 1-(2-hydroxyethyl)-2-imidazolidinone.

Embodiment 3

[0048] According to the method described in Example 1, 5,5-dimethylimidazolidine-2,4-dione 8g was replaced by 5,5-dimethylimidazolidine-2,4-dione 4g and 1-( 2-hydroxyethyl)-2-imidazolidinone 4g.

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PUM

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Abstract

The invention provides a multi-layer composite filtering net for an HEPA filter. The multi-layer composite filtering net for the HEPA filter is characterized by sequentially comprising polytetrafluoroethylene membrane polyester non-woven cloth, an activated-carbon-supported formaldehyde scavenger filtering net, an HEPA filtering net and polytetrafluoroethylene membrane polyester non-woven cloth from the windward end to the downwind end. A single HEPA filtering net of an HEPA filter of the prior art is replaced by the multi-layer composite filtering net, not only conventional particles but also formaldehyde can be efficiently removed, the application range is wide, the filtering efficiency is high, and the service life of the HEPA filtering net is prolonged.

Description

technical field [0001] The invention belongs to the field of chemistry and chemical engineering, and in particular relates to a multilayer composite filter net for a HEPA filter. Background technique [0002] HEPA filters (also known as high-efficiency air filters) play a vital role in the air purification industry. High-efficiency air filters can be widely used in the air-conditioning terminal air supply of dust-free purification workshops in optical electronics, LCD liquid crystal manufacturing, biomedicine, precision instruments, beverages and food, PCB printing and other industries. [0003] The basic requirements of high-efficiency air filters are high filtration efficiency, low flow resistance, and continuous use for a long time to reduce the cost of later consumables. [0004] HEPA filter is mainly composed of filter element, fan and housing. Among them, the HEPA filter (filter element) plays a vital role. In the prior art, the HEPA filter is mainly made of five ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D46/00B01D46/12B01D53/72
Inventor 袁峰
Owner ZHEJIANG ZHIYUAN ENVIRONMENTAL TECH CO LTD
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