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Inventory of "smog artifact": which high-tech can dispel smog?
Although the windy weather in recent days has dispelled the smog accumulated in late spring, it still cannot dispel people's concerns about PM2.5

Rick. At the end of March, when Premier Qiang visited Yuanda Science and Technology Pioneer Park in Tiexi District, Shenyang, he was also very concerned about the PM2.5 filtration desulfurization and denitrification equipment independently developed by enterprises, and encouraged enterprises to popularize and apply new technologies as soon as possible with the support of national policies, on the one hand, to control smog weather, and at the same time to promote the development of environmental protection industry, killing two birds with one stone.

On May 3, two "water cannons" appeared in Dongfanghong Square in Lanzhou to control smog, which once again attracted national attention.

Haze control water cannon

Haze control water cannon

20 14 On May 3rd, Dongfanghong Square in Lanzhou, two Taiwanese green gun barrel machines attracted people to watch. According to the company that installed the equipment, this high-altitude remote air sprayer for smog control can atomize tap water and spray water mist 600 meters away, which can remove dust and cool down the construction site with heavy smog and dust.

High-altitude atomizing spray system

The three-dimensional spray dustfall device on the construction site is spraying dustfall.

Hengli is a 20 13 graduate majoring in mechanical engineering in Wuhan University of Science and Technology. In his junior year, he invented the "smog control artifact" in the construction site-high-altitude atomizing spray system, which was listed in the government's "1 document" in 20/4 years and promoted to the whole city.

Install nozzles on the tower crane to form floating water mist in the air, absorb dust particles and impurities in the air, and play a role in dust reduction. After spraying for a period of time, it can moisten the ground, effectively suppress dust, prevent it from raising again, and even play an auxiliary role in artificial precipitation enhancement.

After his application, the Municipal Construction Committee entrusted the Construction Science and Technology Commission to evaluate the project. It is found that when the wind speed is lower than the second grade, spraying at high altitude can reduce the concentration of particulate matter in the atmosphere of the construction site by 84%. The expert group decided that this technical achievement was the first in China, and it had a good effect on dust suppression and dust reduction on the construction site. It suggested that the administrative department should incorporate the green, safe and civilized construction in Wuhan.

Long-distance spray dust truck

Xi High-tech Zone uniformly deployed five long-distance spray dust trucks to deal with smog.

At the end of 20 13, an artifact of pollution control and haze reduction appeared in Xi' an-a long-distance spraying dust truck. It looks like a big truck from a distance, but the difference is the spraying equipment that stands tall like a gun barrel. The spray height of 60 meters, the spray radius of 80 meters and the ability to spray continuously for 40 minutes make it more like a mobile humidifier.

This device is also called fog gun. According to estimates, the area that a bicycle can atomize at a time is about the size of four football fields, with more than 30,000 square meters. If a spray dust truck full of water can meet the 6 km road spray dust removal operation.

Compared with the water jet from ordinary nozzles, the particles of this water mist are extremely fine, reaching micron level, and its adsorption power is also increased by three times, but the water consumption is reduced by 70%. In foggy weather, PM2.5 with seriously exceeded air quality can choose an area at will to suppress dust by liquid fog, so as to achieve the effect of cleaning and purifying the air.

Haze air purification system

Demonstration diagram of smog air purification system

Feng Jiarui is a seventh-grade student in Zhuzhou Affiliated School of Beijing Normal University. The system he invented can filter smog by using the principle that turbid air is heavier than fresh air. At present, the system has been selected for the Hunan Youth Science and Technology Innovation Competition.

Feng Jiarui's "smog air purification system" looks simple. The system is installed in buildings such as houses, offices and schools. As long as you press a button, the system will always work. There is something like a blower hanging outside the house. The first process is mainly to absorb particulate pollutants in the air. Then, the air filtered through the first layer will pass through the filter layer filled with carbide before entering the house through the pipeline. Finally, the air above the house has to be filtered for the third time before it can be inhaled. The material of this layer is similar to that of masks worn by everyone, and its function is to eliminate "stubborn undesirable elements" in the air. In other words, when outdoor air enters the room, it has to go through three filters. After fresh air enters the house, it is of course necessary to exhaust the turbid air in the house as soon as possible. Therefore, the two windows of the house are respectively equipped with a device similar to an exhaust fan. Based on the principle that turbid air is heavier than fresh air, these turbid gases are discharged.

Flexible wing UAV

Flexible wing UAV

On March 8, the artificial defogging test of a new flexible wing UAV developed by AVIC Aerospace Lifesaving Equipment Co., Ltd. was successfully completed at Shashi Airport, Hubei Province. Xinhua News Agency

Flexible-wing UAV is a low-speed UAV, which uses a ramjet parachute to provide lift for the wing. It was developed by AVIC Aerospace Company, a subsidiary of AVIC Group, and its main purpose is to eliminate smoke. On February 26th, 20 14, the flexible wing UAV successfully made its first flight at the experimental base in northern Hunan. From 2065438 to March 2004, the first round of defogging test was carried out for flexible wing UAV.

In terms of aircraft performance, the flexible-wing UAV has obvious advantages compared with the fixed-wing UAV: First, the fixed-wing UAV with large payload and the same take-off weight can carry more catalysts for operation because of the greater lift provided by large-area stamping parachutes; Second, it is safe and reliable. The flexible wing UAV itself has the function of gliding and descending. Even if the power fails and the engine has no power to stop, the parafoil can be used to glide and land slowly, which will not cause harm to equipment and ground personnel. Third, the flight time is long, and it can be left blank for more than 3 hours at a time; Fourth, the operation is simple, and it can take off by traction at a distance of 50 meters, and the attitude adjustment in air operation is convenient and the landing is smooth; Fifth, the cost is low. According to preliminary estimation, the procurement cost and maintenance cost of flexible wing UAV are 1/3- 1/5 of fixed wing UAV or unmanned helicopter of the same magnitude, and the operating cost is110, so there is no need for complicated maintenance work at ordinary times.

Enterprises and cities saved by smog control technology

In fact, smog control technology is also related to the survival and development of enterprises, the revival of industries and the management and construction of cities, which is confirmed by the development examples of many enterprises and cities at home and abroad.

From the brink of bankruptcy to China enterprises with income exceeding 100 million.

A few years ago, Shandong Guoshun Construction Group Co., Ltd. was an outsourcing company on the verge of bankruptcy due to poor management. After being executed, the company keenly captured business opportunities from the current smog weather. Due to the increasingly severe smog weather in China, during the 11th Five-Year Plan and the 12th Five-Year Plan, the government continuously raised the pollutant emission standards of heavily polluting enterprises. Shandong Guoshun seized the opportunity of "smog control" and cooperated with scientific research institutions to develop new technologies and improve desulfurization capacity. In the end, from a company on the verge of bankruptcy, it has become an environmental protection enterprise with the core technology of smog control and an annual income of over 100 million.

GM's emission reduction device saved Los Angeles.

The serious air pollution in the 1940s and 1950s forced Los Angeles, a city on wheels, to make a big fuss about the technology of controlling automobile exhaust emissions. After a series of technical research and development, General Motors installed a crankcase purifier for cars produced in California, which reduced pollutant emissions by 25%. The development of this new technology has created a number of world-leading manufacturers of exhaust gas purifiers for the United States, and also enabled the United States to master the core production technology of exhaust gas purifiers.

Pollution control has promoted the economy of Kitakyushu, Japan.

Kitakyushu, Japan, whose pillar industry is steel, suffered from asthma due to serious pollution in the last century. In this context, local factories responded quickly. By adjusting the energy structure, developing and utilizing hydrogen energy and building solar power plants, they not only enriched their industrial structure and built new industries, but also saved a lot of energy for the local area and promoted the local GDP to increase by four times in 20 years. Today, Kitakyushu has regarded environmental protection industry as an important pillar of economic development. Kyushu, once the "Dead Sea", attracted more than 65,438+000 species of fish and shellfish to live here.

Curing smog makes Ruhr-gebiet "see the sun again"

More than 40 years ago, the pollution in Ruhr-gebiet, Germany was serious, resulting in severe smog in Germany, acid rain and reduced agricultural production. After realizing the serious impact of air pollution, heavy industrial enterprises in Ruhr-gebiet began to install desulfurization and helium removal devices, at the same time, promoted the transformation and upgrading of industrial structure, developed high-tech industries, and developed zero-pollution power plant technology, so as to reduce the pollution gas generated when burning coal to zero. After a series of treatments, most parts of Germany, including Ruhr-gebiet, have achieved green mountains and green waters, fresh air and advanced ecological and economic development in the world.

Renewable energy makes London bid farewell to the "foggy city"

In the 1950s, London was plagued by fog and haze. Since then, the British people have learned from their mistakes and worked hard to improve the environment, use renewable energy and build an ecological society. In the process of improving the environment, heavy industrial enterprises in London give up using coal and develop green renewable energy such as wind power and solar energy instead. Not only factories, but also houses and supermarkets in Britain create a low-carbon environment by bringing their own biomass generators and recycling rainwater, and basically achieve zero emissions. In today's London, green economy industry is one of the few areas of economic growth, which has created many employment opportunities. Today's London and Britain have finally achieved a win-win situation of economic growth and ecological environment.

Smog control abroad: technology and legislation go hand in hand

In fact, the road to smog control abroad is also full of thorns, and there are many successful experiences. For example, many management experiences after the "Los Angeles Light Fog Incident" are worth learning from in China. When light fog occurs, the air color will change, sometimes the smoke is slightly white, sometimes it is yellowish brown, and the smoke will cause eye pain and tears, and it will also lead to death. When the fog is severe, you need to collect fresh air outside Los Angeles to breathe. However, through years of governance, the number of haze days in Los Angeles is getting less and less.

The method adopted by Los Angeles is neither a car ban nor a car restriction, because the United States is a country on wheels, and Los Angeles relies more on cars than other cities in the United States.

In the end, Los Angeles started with reducing car pollution. 1960, General Motors announced that it would install a crankcase purifier, which is an emission reduction device, on its cars produced for California in196/kloc-0. Although only 25% of hydrocarbon emissions can be removed after installation, it is already a huge progress.

It is worth mentioning that the most important measure in Los Angeles is to encourage people to use * * * bus lanes, which was implemented as early as 1984 Los Angeles Olympic Games and is still in effective use today. The way to do this is to change the fastest left lane of the expressway to * * * lane, which can only be used by two or more people using a car. A single driver will be fined 27 1 USD for using the * * lane. This fast lane is faster than other roads and can reach anywhere in downtown Los Angeles. In addition, the city government of Los Angeles has set up an office to call a special 800 toll-free number. Anyone who wants to take a bus, whether providing a car or taking someone else's car, can call this number, and the professionals of the Transportation Bureau are responsible for matching passengers.

At the same time, the United States began to legislate to control smog. However, the early bill mainly expanded the functions of the federal government in environmental protection, because there were no testing standards and compulsory measures.