Method and device for purifying indoor harmful volatile organic compounds

A technology of volatile organic compounds and air purification devices, which is applied in the field of air purification, can solve problems such as catalytic decomposition, deactivation, and catalyst deactivation of pollutants that hinder target purification, and achieve the effects of rapid recovery of catalyst activity, continuous removal, and efficient removal

Active Publication Date: 2015-06-17
珠海圣邦科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the photocatalyst used in this technology will gradually disappear with the photocatalytic oxidation reaction, that is, the catalyst is "deactivated". The deactivation of the catalyst greatly limits the application of photocatalytic oxidation technology. For example, TiO is currently the most used in this technology 2 Nano catalysts will be deactivated in catalytic oxidation reactions (Applied Catalysis B: Environmental, 2001, 32.1-9; Applied Catalysis B: Environmental, 2001, 30.389-397; Journal of catalysis, 2003, 219(1), 107-116)
[0004] Catalyst deactivation is an unavoidable problem that must be overcome in all catalytic reactions. There are many factors that lead to photocatalyst deactivation. For gas-solid phase reactions, the main reason is that the reaction intermediates are deposited on the catalyst surface and occupy the catalyst activity. Center, thereby hindering the catalytic decomposition of target purification pollutants

Method used

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  • Method and device for purifying indoor harmful volatile organic compounds
  • Method and device for purifying indoor harmful volatile organic compounds
  • Method and device for purifying indoor harmful volatile organic compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as Picture 8 As shown, an air purification device for indoor harmful volatile organic compounds purification, comprising: a hollow cylinder 1 sealed at both upper and lower ends, the inner wall of the hollow cylinder 1 is attached with a net-shaped catalyst carrier 2 and the carrier 2 Coated with titanium dioxide (TiO 2 ) Nano catalyst, the hollow cylinder 1 is also provided with an ultraviolet lamp 3; the side of the upper end of the hollow cylinder 1 is provided with an air inlet 4, and the lower end of the cylinder corresponds to the other side of the air inlet 4 with an air outlet 5; Outside the hollow cylinder 1 is provided an ozone generator 6 and a hydrogen peroxide gas generator 7; an exhaust fan is provided at the air outlet 5. In use, the ozone and hydrogen peroxide gas generated by the ozone generator 6 and the hydrogen peroxide gas generator 7 enter the hollow cylinder 1 through the air inlet 4, so that the The closed space formed by the hollow cylinder...

Embodiment 2

[0048] The difference between this embodiment and the first embodiment is that the concentration of the ozone and hydrogen peroxide is different, and the concentration of the ozone is 0.03 ppm; moreover, different purification can be obtained by changing the composition ratio of ozone and hydrogen peroxide The curve of the efficiency of formaldehyde over time. Such as image 3 As shown, the efficiency of purifying formaldehyde obtained by using the air purification device described in Example 1 under the condition that the mass volume concentration ratios of ozone and hydrogen peroxide are 1:1, 1:3, and 1:10, respectively Comparison chart over time. It can be seen from the figure that the mass concentration ratio of ozone and hydrogen peroxide is in the range of 1:1 to 1:10, and the efficiency of purifying formaldehyde (the range of change over time is about 45% to 99%) is very good.

Embodiment 3

[0050] Such as Picture 9 As shown, an air purification device for indoor harmful volatile organic compounds purification, comprising: a hollow cylinder 1 sealed at both upper and lower ends, the inner wall of the hollow cylinder 1 is attached with a net-shaped catalyst carrier 2 and the carrier 2 Coated with titanium dioxide (TiO 2 ) Nano catalyst, the hollow cylinder 1 is also provided with an ultraviolet lamp 3; the side of the lower end of the hollow cylinder 1 is provided with an air inlet 4, and the upper end of the cylinder is provided with an air outlet on the other side corresponding to the air inlet 4 5; In the lower part of the hollow cylinder 1 is provided with an ozone generator 6 and a hydrogen peroxide gas generator 7; a blower is provided at the air inlet 4. In use, the ozone and hydrogen peroxide gas generated by the ozone generator 6 and the hydrogen peroxide gas generator 7 make the enclosed space formed by the hollow cylinder 1 filled with ozone and hydrogen ...

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Abstract

The invention relates to a method and device for purifying indoor harmful volatile organic compounds. The method for purifying the indoor harmful volatile organic compounds comprises the steps: an air purifier loaded with a photocatalyst is provided; the air purifier is internally filled with a mixed oxidizing agent composed of ozone and hydrogen peroxide; and air containing the harmful volatile organic compounds is allowed to flow through the air purifier, so as to degrade the harmful volatile organic compounds under the action of the photocatalyst. The method not only can effectively inhibit gradual disappearing of the photocatalyst activity during the photocatalytic reaction process, but also avoids secondary pollution brought by use of high-concentration O3 and after-treatment required for O3.

Description

Technical field [0001] The invention relates to air purification technology, in particular to a method and device for purifying indoor harmful volatile organic compounds. Background technique [0002] At present, indoor harmful air volatile organic compound (VOC) pollution, including formaldehyde and benzene series, brought by decoration, electronic products, furniture and daily products has become the main feature of domestic indoor air pollution, which seriously endangers people’s health. . The World Health Organization (September 2011) issued the "Guidelines for Indoor Air Quality", ranking benzene and formaldehyde as the first and third sources of indoor air pollution! Currently, indoor air purification methods include electrostatic dust collection, negative ions, plasma, ozone, activated carbon adsorption, photocatalytic oxidation (photocatalyst) and other technologies. [0003] Among them, the photocatalytic oxidation technology means that the photocatalyst can decompose be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/90B01D53/76
Inventor 李晓峰
Owner 珠海圣邦科技有限公司
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