Summary of indoor air pollution sources
Indoor air pollution definition
Indoor air pollution is caused by human activities or natural processes that cause certain substances to enter the indoor air environment, presenting sufficient concentration for a sufficient period of time and thus endangering human health or the indoor environment. Indoor air pollution includes physical pollution, chemical pollution, and biological pollution.
Indoor air pollution control measures
Indoor air pollution control can be achieved mainly in three ways, namely pollution source control, ventilation and indoor air purification. Pollution source control refers to avoiding or reducing the generation of pollutants from the source; or using barrier facilities to isolate pollutants from entering the indoor environment. Ventilation is the discharge of contaminated air that does not meet hygienic standards to the outside or to the air purification system by means of natural or mechanical forces, while fresh air or purified air is sent into the room. Indoor air purification is to use a specific purification device to purify indoor polluted air and then return it indoors or to the outside.
Indoor air pollution source control technology
1. indoor formaldehyde pollution source control
2. indoor air pollution source control
3. Indoor volatile organic compounds (VOCS) pollution source control
4. asbestos pollution source control
Indoor air pollution source control measures
(1) Strengthening the monitoring and supervision of indoor air quality
Regularly monitor indoor air quality, conduct indoor air quality assessment based on monitoring data and indoor air quality standards, and propose control strategies for indoor air pollutants.
(2) Control of indoor pollution sources
Reducing and eliminating indoor pollution sources is the most economical and effective way to improve indoor air quality and improve comfort. Reduce indoor smoking and indoor combustion processes to reduce the use of aerosols, cosmetics, and more importantly, control materials and furniture that can pollute the environment into the room; and the source control strategy is mainly to choose and Develop green building decoration materials.
(3) Strengthen indoor ventilation
Ventilation is the key to improving the air quality of the room. Strengthening ventilation and ventilation, using outdoor fresh air to dilute air pollutants, reducing concentration and improving indoor air quality, is the most convenient and quick method. The higher the indoor and outdoor air exchange rate, the higher the effect of reducing the pollutants generated indoors, but sometimes the outdoor pollutants are brought into the room.
(4) Reasonable use of air conditioners
At present, most residential buildings use air conditioners alone. The air is basically circulated indoors. If the fresh air volume is insufficient, the indoor air quality will be reduced. Therefore, it is necessary to open enough windows to introduce enough fresh air (indoor and outdoor temperature difference 5~10). At °C, 50~100m3/h). For the case of central air conditioning, filter devices should be installed on the air inlet and return air passages of the air conditioning system, and the filter device should be cleaned frequently. In addition, no matter which air-conditioning method is used, it is necessary to open the window to ventilate the air. If the indoor pollution source is strong, the air conditioner cannot be used. Only when the pollutant concentration falls below the safety and hygiene standards, it should be considered.
(5) Installation and use of effective indoor air purification facilities
Air purification devices with different functions can be selected according to different pollutants in the living room, kitchen and bathroom. For example, noiseless, air purifiers that can be used for health, air purifiers that can filter dust, bacteria and harmful gases can be improved. Room air quality. In addition, raising flowers and plants indoors can not only effectively absorb harmful substances in the air, but also beautify the living environment.
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