For PM2.5, which is of public concern, according to the first indoor PM2.5 pollution public welfare research report released by Tsinghua University, compared with outdoor PM2.5 pollution, the impact of indoor PM2.5 on people is more significant - per capita indoor PM2.5 inhalation The amount is 4 times that of the outdoor.
Photocatalyst-catalyzed air purifier eliminates dirty air in the room
For PM2.5, which is of public concern, according to the first indoor PM2.5 pollution public welfare research report released by Tsinghua University, compared with outdoor PM2.5 pollution, the impact of indoor PM2.5 on people is more significant - per capita indoor PM2.5 inhalation The amount is 4 times that of the outdoor.
The data show that 68% of human diseases are related to indoor air pollution. China's urban air pollution is serious, and more than 300 kinds of pollutants can be detected indoors. People need to quickly remove a variety of harmful substances in indoor air and completely purify products with low concentration of pollutants.
China's indoor air pollution is complicated
According to the urban air quality status released by the Ministry of Environmental Protection in July, the average number of days with excellent cities in 338 prefecture-level cities and above was 88.1%, up 2.4 percentage points year-on-year. The PM2.5 concentration was 29 micrograms per cubic meter, down 19.4% year-on-year. Although compared with the past, some cities in China have seen more time in the "blue sky and white clouds", but in fact, China's ambient air quality standards and international standards are only "low-track", that is, the "Air" issued by the World Health Organization. The most relaxed first-stage target value in the Quality Guidelines. When the air quality meets the new national standard “goodâ€, indoor and outdoor air still has a certain impact on health, especially for sensitive people such as patients, the elderly and children.
In order to eliminate air pollution, there are many types of air purification products on the market. The data show that current mainstream air purification technologies include activated carbon adsorption, negative oxygen ions, electrostatic dust collection and HEPA high efficiency filtration. According to a comprehensive survey, the main pollutants in the air in China are divided into three categories:
One is inhalable particles, including PM2.5, PM10, smoke, pollen, etc.;
The second is microbes, including bacteria, fungi, viruses, etc.;
The third is harmful volatile gases, including ammonia, carbon monoxide, formaldehyde, and benzene.
The traditional photocatalytic technology has no obvious effect on the removal of low concentration formaldehyde, benzene series and volatile organic pollutants. The experimental data proves that when the concentration of formaldehyde, benzene, etc. is less than 0.3 ppm (parts per million), the photocatalytic catalysis technique has substantially no scavenging effect.
In particular, the photocatalyst is a catalyst, which is a catalyst reaction on the surface of the photocatalyst material, and the photocatalyst material itself does not change or be lost. Therefore, the pollutants are continuously purified under the illumination of light, and the action time is long; under the condition that the environmental pollution is not serious, as long as it is not worn or peeled off, the photocatalyst itself will not change and be lost, and can be continuously purified under the illumination of light. Contaminants. Quickly remove harmful volatile organic compounds
However, the photocatalytic technology has no obvious effect on the removal of formaldehyde, benzene and volatile organic pollutants at low concentrations. In order to overcome this shortcoming, “the technology and products of Hubei Longchuang increased the pretreatment chamber in front of the catalytic reaction chamber through the adsorption photocatalytic catalytic reaction mode, which increased the adsorption capacity of formaldehyde and toluene before the catalytic reaction chamber, and increased the catalytic activity. The catalytic reaction concentration in the reaction chamber achieves effective photocatalytic removal of harmful volatile organic compounds such as formaldehyde and toluene at low concentrations. This device has a unique structure, long service life and no secondary pollution," said Qi Wenqi, a researcher at the China National Environmental Monitoring Center. Due to the modular structure of the purifier core reaction device, the maintenance is convenient.
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