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According to the working principle, the dust collector can be divided into electrostatic dust collector, bag filter, wet dust collector and cyclone dust collector. Among them, the electrostatic precipitator has high dust removal efficiency and low operating cost, but the equipment is large, the floor space is large, the equipment manufacturing, installation and maintenance requirements are high, and the dust characteristics are sensitive; the bag dust collector has high dust removal efficiency, and is used. Flexible, simple structure, low investment, but high maintenance cost; wet dust collector is more efficient than dry type, dealing with high temperature, high humidity and sticky dust, simple structure, small investment, but not suitable for water repellency and hydraulic Dust, anti-icing in winter; cyclone dust collector is simple in structure and easy to maintain.
The application development of dust removal technology is closely related to the industrialization process. In the early stage, China's industrialization was low. The main polluting industry emitted relatively small amount of smoke, low environmental protection requirements, low requirements for dust removal technology, simple structure and low investment. Cyclone dust collectors and wet dust collectors are in the mainstream, and electrostatic dust removal technology and bag dust removal technology are developing slowly.
After the 1980s, the process of industrialization and urbanization accelerated, and the industries such as electricity, cement, steel, and non-ferrous metals developed on a large scale. The amount of smoke emitted by the industry has also increased substantially, resulting in increasingly serious environmental pollution. Environmental protection issues have received increasing attention. Therefore, the electrostatic precipitator technology has gradually replaced the original dust removal technology and has been greatly developed.
In the 21st century, with the further development of China's power, cement, steel, non-ferrous metals and other industries, the country's environmental protection requirements have been further improved. Bag-type dust removal technology has gained rapid popularity due to its excellent performance in dust removal efficiency, and is accelerating its development. .
At present, electric dust removal, bag dust removal and electric bag composite dust removal are the mainstream dust removal technologies in China. Electrostatic precipitators, bag filters and electric bag dust collectors have become effective dust removal devices for air pollution control, and their development is becoming increasingly severe in the future. The air pollution control is crucial.
Taking coal-fired power plants as an example, in recent years, technological innovations in electric dust removal have achieved remarkable results in the ultra-low emission work of the coal-fired power industry, effectively ensuring long-term stable operation of the unit and continuous ultra-low emission operation. The proportion of electrostatic precipitators in coal-fired power plants has increased from 30% in 1990 to 80% in 2000. The proportion between 2005 and 2010 has remained at 95%. Subsequently, the combination of bag and electric bag composite dust removal technology has declined. According to the statistics of China Electricity Council, as of December 2017, the dust collection market in the power industry is about 66.4%. The electrostatic precipitator is still the mainstream dust removal equipment for coal-fired power plants. The low-temperature and low-voltage electric dust removal technology has almost become a domestic coal-fired power plant. Ultra-low emission "standard".
The scope of application will be expanded, and enterprises will increase the layout of overseas markets.
First, the scope of application of the industry will be further expanded. At present, dust collectors are still mainly used in coal-fired power plants, steel, coal and electrolytic aluminum industries with high energy consumption and serious dust generation. In 2016, dust removal equipment products were mainly used in the power industry, accounting for 36.80%; followed by cement industry. , accounting for 23.07%; the steel industry also accounted for more than 20%, accounting for 20.12%. In the future, as the requirements of national pollution control become higher and higher, dust removal equipment products will be applied to more industries, and the market space will continue to expand.
Secondly, the higher efficiency and lower dust concentration are the general trend of the development of dust removal equipment. This is because: the dust emission standards are more stringent; the law enforcement efforts are constantly increasing, and the means are increasingly advanced; the control of fine particles is taken seriously; the public's environmental awareness is rapidly increasing. In this context, the electric bag composite dust removal will become the mainstream dust removal mode due to its high filtration efficiency and good economy.
* After the dust removal equipment manufacturing industry will step up the pace of going out. Among them, the overseas market is still based on the infrastructure of the countries along the “Belt and Roadâ€, and the subcontracting task of undertaking large-scale infrastructure projects is still the main channel for environmental protection enterprises to export environmental protection equipment; with the tightening of international environmental protection regulations, in addition to Southeast Asia In addition to the biomass boiler dedusting market, the renovation and new construction of electrostatic precipitators, desulfurization and denitration systems for coal-fired power stations in Indonesia, India and Vietnam will be hot spots in the market. Localized production, technical cooperation, technology transfer and other cooperation methods will become overseas markets. New development direction.
2018 dust removal equipment manufacturing industry development: the scope of application will be expanded
Dust removal equipment refers to the equipment that separates the dust from the flue gas. It is a device with many air pollution control applications. It is also an important equipment in the dust removal project, also known as a dust collector.