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Indoor air purification method

An indoor air and air technology, applied in the field of indoor air purification, can solve the problems of limited adsorption capacity of adsorbents, no consideration of preventing bacteria breeding, easy breeding of bacteria, etc., to prevent secondary pollution, ensure ozone concentration, and prolong service life Effect

Inactive Publication Date: 2004-07-28
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Filtration methods do not address removal of gaseous pollutants
Activated carbon adsorption is currently the most commonly used indoor air purification method. This method is especially suitable for purifying organic compounds, but the purification effect for some inorganic pollutants and volatile organic compounds with low boiling points cannot be guaranteed.
In addition, due to the limited adsorption capacity of the adsorbent, it needs to be replaced frequently
In addition, because the existing purifiers based on filtration and adsorption do not consider the problem of preventing bacterial growth, bacteria are easy to breed on the surface of filter materials and adsorbents, becoming a new source of indoor air pollution

Method used

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Experimental program
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Effect test

Embodiment 1

[0018] A DC high voltage of 8kV is applied to the two poles of the high-voltage electric field, and alumina impregnated with potassium permanganate is used as the adsorption catalyst material. The indoor air containing 11ppm formaldehyde was passed into the purification system, and the continuous operation was 24 hours. No formaldehyde was detected before and after the adsorption catalytic bed.

Embodiment 2

[0020] A DC high voltage of 12kV is applied to the two poles of the high-voltage electric field, and the activated carbon fiber impregnated with acetic acid is used as the adsorption catalyst material. Indoor air containing 14ppm of ammonia was introduced into the purification system and operated continuously for 24 hours. The concentration of ammonia was 11ppm before the adsorption catalytic bed, and no ammonia was detected after the adsorption catalytic bed.

Embodiment 3

[0022] A pulsed corona discharge with a base voltage of 8kV and a high voltage of 30kV is applied to the two poles of the high-voltage electric field, and granular activated carbon impregnated with potassium permanganate is used as the adsorption catalyst material. Indoor air containing 22ppm benzene was introduced into the purification system and operated continuously for 24 hours, the benzene concentration dropped to 3ppm before the catalyst bed was adsorbed. Benzene was not detected at the outlet of the adsorption catalyst layer.

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Abstract

The present invention relates to an indoor air purification method. The method can separate out the microfine granular substances (including bacteria, cigarette smoke and fume, etc.), volatile organic compound ando ther harmful gas from indoor air or purify it so as to obtain clean indoor air. It includes the following steps: utilizing fan to make the air to be purified pass through coarse filtering screen fistly to remove large granules and fibre, then making said air be fed into high-voltage electric field and be passed through the filtering layer, finally be fed into adsorption catalytic bed to completely remove harmful components indoor air.

Description

technical field [0001] The invention relates to a method for purifying indoor air, which belongs to the field of environmental protection, and more specifically relates to a method for separating fine particles (including bacteria, cigarette smoke, lampblack, etc.), volatile organic compounds and other harmful gases from indoor air. A method of getting clean indoor air by coming out or purifying it. Background technique [0002] Indoor air refers to the air in a confined space enclosed by natural or artificial materials. About 70% to 90% of people's life is spent indoors. Therefore, in a certain sense, the indoor environment has far more impact on people's life and work quality, as well as the public's health than the outdoor environment. However, due to the enclosure effect of building materials, the indoor air is different from the outdoor air, especially with the improvement of energy saving and indoor temperature and humidity requirements, the airtightness of buildings ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F3/16
Inventor 朱天乐郝吉明王延吉李俊华
Owner TSINGHUA UNIV
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