How to remove lead particles by electrostatic precipitator

Analysis and Countermeasures of Indoor Air Pollution

With the improvement of living standards and lifestyle changes, people spend more and more time indoors, and indoor air quality directly affects people's work and life. Poor air quality will distract people and reduce work efficiency. In severe cases, it can also cause headaches, nausea, fatigue, redness of the skin and other symptoms, which are collectively called "sick building syndrome". People are eager to improve the increasingly bad living room and office environment and improve the quality of life.

I. Analysis of Indoor Air Pollution

People always think that serious air pollution is outdoors. In fact, the indoor environment of offices, bedrooms, restaurants, theaters, dance halls and other buildings has a much greater impact on people's health than outdoor. People spend about 80% of their life indoors, so the indoor environment directly affects human health. From the reality, the indoor air quality is far worse than the outdoor atmospheric environment.

Environmental protection workers remind people that indoor air pollution is often 2-3 times more serious than outdoor air pollution, and in some cases, it can even reach more than 100 times. About 300 kinds of pollutants can be detected indoors, and 68% of human diseases are related to indoor air pollution.

Indoor air pollution mainly comes from the following five aspects: first, human breathing and smoke; Second, decoration materials and daily necessities; The third is microorganisms, viruses and bacteria; The fourth is kitchen fume; The fifth is air conditioning syndrome. These pollutants enter the human body with breathing and accumulate for a long time, which seriously harms people's health.

1. Human respiration and smoke

The results show that about 500 chemical substances are produced in the process of metabolism, of which 149 are excreted through the respiratory tract. Pathogens and smells emitted by human breath, including many toxic components, must not be ignored. The human body excretes as many as 17 1 species, such as urea and ammonia. In addition, cells shed from human skin account for about 90% of air dust. Too high concentration will form indoor biological pollution, affect human health and even induce many diseases.

Smoking is one of the main sources of indoor air pollution. The composition of flue gas is complex, including solid phase and gas phase. Identified by the expert group of the International Institute for Cancer Research, and proved by animal carcinogen experiments, there are more than 40 kinds of "carcinogens" in tobacco smoke. Smoking can obviously increase the incidence of cardiovascular diseases and is the "number one killer" of human health.

2. Decorative materials and daily necessities

All kinds of paints, coatings, wall coatings, adhesives, wood-based panels, marble floors and newly purchased furniture will emit phenol, formaldehyde, asbestos dust and radioactive substances. , can cause headaches, insomnia, dermatitis and allergies, and reduce human immune function, so the International Institute of Cancer lists it as a suspected carcinogen.

3. Microorganisms, viruses and bacteria

Microorganisms and dust mostly exist in warm, humid and unclean environments. They float in the air with dust particles and become allergens and transmission routes of diseases. Dust mites, in particular, are allergens of human bronchial asthma. Dust mites like to inhabit the dust in the room. Spring and autumn are the most prosperous periods for the growth and reproduction of dust mites.

4. Kitchen fumes

In the past, people paid little attention to the indoor air pollution caused by kitchen fumes. According to the research, the number of lung cancer patients among urban women has increased, and most of them have been diagnosed as adenocarcinoma by hospitals, which is a kind of lung cancer case rarely related to smoking. Further research shows that the carcinogenic pathway is related to the mutation caused by kitchen fume and the mutagen of oxidative decomposition of high temperature edible oil. Another major source of pollution in the kitchen is the burning of fuel. In the case of poor ventilation, the concentrations of carbon monoxide and nitrogen oxides produced in gas appliance far exceed the limits set by air quality standards, and such concentrations are bound to cause harm to human body.

5. Air conditioning syndrome

People who work in air-conditioned environment for a long time often feel bored, tired, sleepy, muscle pain, high incidence of colds, and obvious decline in work efficiency and health level. These symptoms are collectively referred to as "air conditioning syndrome". These adverse reactions are mainly due to the long stay time in the closed space, and the gradual accumulation of CO2, CO, inhalable particles, volatile organic compounds and some pathogenic microorganisms, which aggravate the pollution. The above reasons lead to poor indoor air quality and many diseases, which in turn affect work efficiency.

Second, measures to improve indoor air pollution

Indoor air quality directly affects people's physical health, psychological health and comfort. In order to improve indoor air quality, improve living and office conditions and improve physical and mental health, indoor air pollution must be rectified.

1. Use the latest air purification technology.

For indoor particulate pollutants, purification methods mainly include electrostatic dust removal, diffusion dust removal, shielding dust removal and so on. The purification device mainly includes mechanical dust collector, filter dust collector, charged dust collector and wet dust collector. From the economic point of view, the filter dust collector is preferred; From the point of view of high efficiency and cleanliness, electrostatic precipitator is the first choice.

For indoor bacterial and virus pollution, the purification method is low temperature plasma purification technology. The matching device is a low-temperature plasma purification device.

For the removal of indoor odor and odor, the purification method is a multifunctional and efficient particle filter element woven with 0.2 ~ 5.6 micron glass fiber, which has high filtration efficiency for particles.

Photocatalytic degradation is very effective for degrading pollutants in indoor air, such as benzene series, haloalkanes, aldehydes, acids and ketones. For example, sunlight, tungsten halogen lamp, mercury lamp, etc. are used as ultraviolet light sources, and sharp mineral nano titanium dioxide is used as catalyst.

2. Reasonable layout and distribution of indoor and outdoor pollution sources

In order to reduce the impact of outdoor air pollution on indoor air quality, it is necessary to rationally arrange various pollution sources in urban areas. Residential areas and other densely populated areas should be far away from pollution sources, and the pollution sources should be located in the downwind away from residential areas to avoid the problem of mixed residential houses and factories. Health and environmental protection departments should strengthen the tracking detection and evaluation of residential areas and crowded places, and provide the impact of indoor air quality on human health.

3. Strengthen indoor ventilation times

For formaldehyde, indoor radioactive radon, etc. , should strengthen the ventilation times, especially formaldehyde pollution control. There are three ways: one is to use activated carbon or some green plants; The second is ventilation; The third is the use of chemicals. The concentration of indoor radioactive radon will decrease during ventilation; But once it is not ventilated, the concentration will continue to rise, and the concentration of radon daughters will not be reduced because of frequent ventilation. The only way is to remove the radioactive source.

The requirement of indoor air quality is not limited to home, but exists in all indoor places, such as hotels, hotel rooms, restaurants, entertainment places, shopping malls, theaters, exhibition halls and so on. , as well as government agencies, reception rooms, schools and other office places. In addition to attaching importance to scientific research and monitoring, strengthening team building, formulating industry standards and strengthening legislation and publicity, it is very urgent and necessary to increase investment, adopt high technology and develop new and efficient indoor pollution purification devices to eliminate indoor air pollution and ensure people's health.

With the gradual deepening of the "people-oriented" concept, people pay more and more attention to the quality of living space and the control of indoor environmental pollution. We believe that in the near future, the situation of indoor environmental pollution control will be greatly improved. 70