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Filter screen for removing harmful gas

A harmful gas and filter technology, applied in the field of air purification, can solve the problems of low particle porosity, inability to meet the requirements of removing media, and research stagnation

Pending Publication Date: 2020-10-23
NANJING YUNXIANG NANO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the granules produced by the extrusion granulation method, it is difficult to form holes through the interior of the granules as a place for contact and reaction with harmful gases, and the porosity of the granules is very low, which cannot meet the requirements of the harmful gas removal medium in the air purification industry. Requirements, so it is not continued to be applied, and the corresponding research is also at a standstill

Method used

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  • Filter screen for removing harmful gas
  • Filter screen for removing harmful gas
  • Filter screen for removing harmful gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Referring to the ratio of raw materials in "CN201910547521.1-A Harmful Gas Removal Medium and Its Preparation Method", 510g of activated alumina, NaHCO 3130g, 15wt% Portland cement and 85wt% calcium hydroxide binder 160g and 27.6wt% concentration of sodium permanganate aqueous solution 300ml (369g) are first mixed into powder, and then the powder is granulated by extrusion Cylindrical pellets with a diameter of 2 mm and a length of 2 mm were produced. The prepared granules were left to stand at room temperature for 12 hours, and then solidified at a high temperature of 110° C. for 1.8 hours until the water content of the solid particles was 17%, that is, a harmful gas removal medium containing 10wt% sodium permanganate was obtained.

Embodiment 2

[0037] Preparation of harmful gas removal medium containing 12wt% sodium permanganate Preparation method is the same as embodiment one, only changing the content of sodium permanganate, that is, 300ml (369g) of sodium permanganate aqueous solution of 27.6wt% concentration is sprayed on the mixture.

Embodiment 3

[0039] Preparation of harmful gas removal medium containing 8wt% sodium permanganate

[0040] The preparation method is the same as in Example 1, except that the content of sodium permanganate is changed, that is, 300 ml (355 g) of a 23.1 wt % sodium permanganate aqueous solution is sprayed onto the mixture.

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Abstract

The invention relates to a filter screen for removing harmful gas. The filter screen for removing harmful gas consists of a net-shaped structure and permanganate type inorganic particles. According tothe invention, the cylindrical permanganate-type inorganic particles with high mechanical strength are prepared by adopting an extrusion granulation process, and the permanganate-type inorganic particles are combined with the net-shaped structure by adopting a hot melting mode through a hot melt adhesive. Raw materials selected and used in the invention are cheap; a production process is simple and is suitable for large-scale production and manufacturing; and considerable efficiency is obtained in removal of harmful gas, especially formaldehyde.

Description

technical field [0001] The invention belongs to the field of air purification, and in particular relates to a filter screen for removing harmful gases. Background technique [0002] The removal of harmful gases is mainly achieved by physical adsorption and chemical adsorption. Physical adsorption and chemical adsorption are not isolated, but often occur together. Physical adsorption is an adsorption phenomenon between the adsorbent and the adsorbate through the intermolecular force (van der Waals force). Generally, there is no selectivity, the force is small, and the process is reversible, that is, the adsorbed gas molecules are relatively easy to desorb (desorption ). In contrast, chemisorption is the result of a chemical reaction between the surface of the adsorbent and the adsorbate, which is selective and irreversible. [0003] At present, the most commonly used harmful gas removal medium is activated carbon. Activated carbon is a common non-polar adsorbent that can a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J20/28B01J20/30B01D53/02
CPCB01D53/02B01D2257/70B01J20/04B01J20/08B01J20/28033B01J20/28054
Inventor 张世著金鹏翔张志雄童宁军石欣超张将
Owner NANJING YUNXIANG NANO TECH CO LTD
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