Microwave assisted plasma catalytic air purification method and purification device

An air purification device and plasma technology, which is applied in the field of air purification technology, can solve the problems of high air flow rate, low degradation efficiency, and lack of degradation ability of the purification device, and achieve large-flow air purification, increase in yield and energy, The effect of good degradation effect

Inactive Publication Date: 2008-10-22
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual application process, there are still many deficiencies in the plasma catalytic purification technology and devices, which are concentrated in: 1. Ozone and NO will be generated during operation x and other by-products, the output of these by-products sometimes even exceeds the harmful gas content before purification, and, for the original indoor NO x , the existing simple adsorption, photocatalysis, and plasma air purification devices do not have the degradation ability; 2. The processing capacity per unit time is limited, the air flow rate of the purification device is high, and the degradation efficiency is low when the passing time is short Too low to meet the requirements of handling large air flow in a short time
[0003] According to the relevant novelty data, so far, there has been no report on the application of microwave in the research of plasma catalytic degradation of harmful gases at home and abroad.

Method used

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  • Microwave assisted plasma catalytic air purification method and purification device
  • Microwave assisted plasma catalytic air purification method and purification device
  • Microwave assisted plasma catalytic air purification method and purification device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Taking the treatment of air containing acetaldehyde as an example, barium titanate pellets were selected as the filling medium in the test, and the carbon reduction unit was located in the rear part of the catalytic reactor. Microwave input power is 200W. Figure 4 Shown is a comparison of the degradation effect of acetaldehyde when the exhaust gas passes through the catalytic reactor once with and without microwave radiation enhancement. It can be seen that the effect of plasma degradation of acetaldehyde is significantly enhanced after microwave radiation. Other organic substances such as benzene, The degradation effect of organic matter such as toluene is similar.

Embodiment 2

[0037] Figure 5 Shown is the comparison of the production of by-product NOx when the air passes through the plasma catalytic reactor once with and without the microwave-char reduction unit. The test conditions were the same as in Example 1. From Figure 5 It can be seen that after adding microwave-charcoal reduction unit, NO x By-products are greatly reduced. In addition, if the microwave-charcoal reduction unit is separated from the catalytic reaction unit, and the exhaust gas is recycled, the NO x The output can be further reduced, when the cycle time is longer, the NO x eventually be eliminated completely.

[0038] In the embodiment of the air purification device provided by the present invention, a negative ion net 4 is installed in the casing 7, and a large amount of negative ions can be generated by acting on the negative ion net 4 by the microwave itself and the flow field and temperature field induced by the microwave. When the purification device starts to work...

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Abstract

A microwave aided plasma catalyzing method an apparatus for cleaning air by degradating the harmful gas and eliminating the by-products (ozone and NOx) generated by plasma catalyzing features that the microwave field at 2.45-40 GH2 is applied to the plasma catalyzing reactor and a carbon reducing unit is additionally used.

Description

technical field [0001] The invention relates to an application of plasma catalysis technology in indoor air purification treatment, in particular to an air purification technology for coupling microwave and plasma catalysis to degrade harmful gases in the air and eliminate by-products produced in the plasma catalysis process. Background technique [0002] The indoor air pollution caused by the popularization of indoor decoration and (central) air conditioners, etc. has been attributed to one of the environmental factors that endanger public health by the international community. In order to purify indoor air, various indoor air purification devices and technologies have been developed, including physical filtration, electrostatic dust removal, negative ions, ozone or ultraviolet light, etc. None of these purification technologies can completely eliminate gaseous pollutants and make them harmless. change. In recent years, new technologies that can degrade organic substances ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/86F24F3/16
Inventor 王建伟杨建李荣先
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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