Indoor air purifying method and device

Abstract

A photocatalytic method and apparatus for cleaning indoor air is characterized by that in its airflow channel, a duster is first used to remove dust from air, the activated carbon is then used to remove odor from air, an ultraviolet lamp is then used to kill bacteria and viruses while as a stimulating light source of photocatalysis, and the nano TiO2 as photocatalyst carried on meshed foam ceramic is finally used to kill bacteria and viruses and degradate low-concentration chemical pollutants.

Description

technical field [0001] The invention belongs to an indoor air purification method and an indoor air purification device adopting the method. Background technique [0002] Due to the aggravation of air pollution, the indoor air pollution caused by the popularization of interior decoration and the use of air conditioners, people are paying more and more attention to it. Indoor air purifiers are devices that are used to improve and improve indoor air quality. At present, the air purification devices used at home and abroad mainly include pure mechanical filter type, electrostatic type, chemical (or physical) adsorption type, negative ion type, ultraviolet sterilization type and photocatalytic type, etc. The first two types of purifiers have been gradually eliminated. , The adsorption type purifier has the problem that the adsorption material is easily saturated. The negative ion type is generally considered to have only the physical effect of eliminating smoke and dust, but it ...

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Problems solved by technology

At present, the air purification devices used at home and abroad mainly include pure mechanical filter type, electrostatic type, chemical (or physical) adsorption type, negative ion type, ultraviolet sterilization type and photocatalytic type, etc. The first two types of purifiers have been gradually eliminated. , Adsorption-type purifiers have the problem that the adsorption material is easily saturated. The negative-ion type is generally considered to have only the physical effect of eliminating smoke and dust, but it is powerless against bacteria, viruses and chemical pollutants. The ultraviolet sterilizing type is powerless against organic substances such as harmful gases and odors

In recent years, photocatalytic technology is considered to be a promising indoor air purification technology. It can completely remove harmful gases, odors, bacteria and viruses through photocatalytic oxidation. However, as a unit operation process, it is still There are certain limitations and deficiencies, such as the micropores of the catalyst are easily blocked, the catalytic efficiency is low, and the catalytic activity is easily deteriorated, etc.

Now some researchers integrate photocatalytic oxidation technology and activated carbon fiber adsorption technology for air purification, expecting to realize in-situ regeneration of purification materials and improve catalytic efficiency, but it is difficult to irradiate the surface of photocatalysts fixed on activated carbon fibers due to ultraviolet light , can not achieve photocatalytic effect, so it is difficult to achieve the purpose of in-situ regeneration of purification materials

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