Haze, PM2.5, has accidentally become a topic of concern to everyone. No wonder, it is closely related to people’s lives, and everyone lives under the same haze. People in different industries have different thoughts around haze, such as the popularity of air purifiers on the market. In scientific research and engineering practice, there are also some interesting things, which can be described as a big drama.
Controlling smog is a good thing that benefits the country and the people, but these big dramas always make people feel that the style is wrong.
In 2014, the Chinese Academy of Sciences proposed to build the world's largest smog laboratory at a cost of 500 million and covering an area of ??50 acres to study the causes of smog. /n/397598676/
It is time to study the causes of smog. However, whether smog control is a scientific issue, a technical issue or a management issue is also worth exploring. After all, from the 2008 Olympics to APEC to the Hangzhou G20, our haze control results are still very significant. It seems that the causes of smog and how to control them are roughly understood.
I don’t know who invented the fog cannon truck when it was running. During operation, the fog cannon truck sprays a large amount of water mist into the air to reduce particulate matter in the air and reduce haze in the air. Fog cannon trucks have been launched in many cities in a low-key manner. However, it seems that no local government has promoted them as a powerful tool to control smog.
Until the end of 2017, a piece of news brought fog cannon trucks into the public eye. The Environmental Protection Bureau building in Shizuishan, Ningxia was turned into an "ice sculpture" after being sprayed with a large amount of water mist by a fog cannon truck. The reason is that the Environmental Protection Bureau building has an automatic air quality monitoring station of the National Environmental Monitoring Network, and the fog cannon truck must "manage" its surroundings. of air pollution. /18/0122/02/D8NJ6RP6000187VI.html
It seems that the fog cannon truck can really control the haze.
The beginning of 2018 is a big drama. A magical patented solution to control haze has spread all over the world and successfully grabbed the headlines. The method of operation is, for example, in Beijing, when smog hits, 15 million people are organized to hold banana fans, ah no, smog fans, and start wind-making movements in the same direction to eliminate the smog. The resulting wind force can blow the newly formed Mild smog moves out of Beijing.
How amazing. /17/1128/18/D4BO1GLP0001875P.html
Urban air ducts
Many cities are planning urban air ducts. How effective they are depends on how to interpret the data.
In 2017, Xi'an, Shaanxi Province built a "haze removal artifact" with a total construction area of ??2,580 square meters and a height of more than 100 meters - a large-scale solar urban air cleaning comprehensive system (referred to as the haze removal tower). I have to say, what a big outdoor air purifier.
Finally, here is another picture. An article recently published by EST studied PM2.5 in the kitchen. Whoosh.