First, industry status
1.Dust removal industry

The key industries involved in dust removal in China mainly include thermal power, steel, cement, nonferrous, petrochemical, chemical, waste incineration and other industries。Electrostatic precipitator and bag precipitator are the main dust removal equipment in our country。In general, China's electric dust removal and bag dust removal have reached the international level。

In recent years, the number of electrostatic precipitators produced and used in China has ranked first in the world, and the technical level is also among the best in the world, and a series of advanced technology and product results have been achieved, and the efficiency of electric dust removal has been further improved。At present, China's electrostatic precipitator can not only meet domestic demand, but also a considerable part of exports abroad, China's electric dust removal industry has been able to compete with foreign manufacturers。The most widely used electrostatic precipitator industry in China is thermal power industry, and with the promotion of ultra-low emission thermal power plants, a number of advanced applicable technologies such as wet electrostatic precipitator, low temperature electrostatic precipitator, electric bag composite precipitator have emerged in recent years, and more and more applications in thermal power industry。However, although the application of electrostatic precipitator in China is more extensive and mature in the thermal power industry, its application in cement, metallurgy and other industries is relatively slow, and its development in various industries is very unbalanced, of course, which is closely related to national policies and enterprise benefits。

At present, the level of bag dust collector in China has also reached the international level, and its application covers many fields, with high dust removal efficiency, reliable effect, and the ability to cooperatively control a variety of pollutants。With the advancement of material manufacturing process，In recent years, China has also developed aramid, polyphenylene sulfide, polyimide and polytetrafluoroethylene filter material and other urgently needed materials，At the same time, the processing technology of composite filter material has been developed，The performance of the filter material has been developed by leaps and bounds，The end of China's high-end bag dust filter material long-term dependence on imports，It has laid a solid foundation for the bag dust collector to go out of the country。

2.Desulphurization and denitrification industry

China's key desulfurization and denitrification industries involve thermal power, steel, cement, glass, chemical and other industries，Among them, the thermal power industry has developed most rapidly，The technology is more mature，This echoes the national focus on promoting electric power environmental protection during the "Twelfth Five-Year Plan" period，The development of desulfurization of steel sintering machine and denitrification of cement kiln has also improved，By contrast，Progress in desulphurization and denitrification in other non-electricity industries has been slow。By the end of 2015, China's thermal power desulfurization and denitrification installed capacity has reached 99% and 92% of the total installed capacity.The installation rate of desulfurization facilities of steel sintering machine reaches 88%;New dry process cement production line denitration facilities installed capacity also reached 1.6 billion tons。

3.Thermal power ultra-low emissions

China's ultra-low emission thermal power work progress rapidly, as of January 2016, the country has nearly 200 million kW coal power units completed ultra-low emission upgrading, accounting for more than 20% of the total installed capacity of coal power units, and the capacity of coal power units being upgraded at that time also reached 80 million kW。

Ii. National Policy

In recent years, the state has issued a series of policy documents related to the prevention and control of air pollution, vigorously promoted the prevention and control of air pollution, and effectively promoted the rapid development of the dust removal, desulfurization and denitrification industry。

In February 2013, the Ministry of Environmental Protection issued the Announcement on the implementation of Special Emission Limits for Air Pollutants, which implemented special emission limits for air pollutants in the six industries of thermal power, steel, petrochemical, cement, non-ferrous and chemical industries and coal-fired boiler projects in the "three regions and ten groups"。

2013年9月，The Action Plan for the Prevention and Control of Air Pollution clearly sets out the targets for the control of particulate matter in "three regions and ten groups" by 2017，At the same time, it also emphasized the requirements of comprehensively regulating small coal-fired boilers, accelerating the construction of dust removal, desulfurization and denitrification projects in key industries, and implementing desulfurization in coal-fired boilers，It highlights the necessity and urgency of promoting the control of air pollution in coal-fired boilers and key industries。

The "Measures for the Supervision of the Environmental Protection Price of Coal-fired Generating Units and the operation of environmental protection Facilities" and the "Notice on Further Channeling the contradiction of Environmental Protection Price" implement electricity price subsidies for coal-fired generating units to meet the emission standards。

In August 2014, the "Notice on Strengthening the Supervision of Waste flue Gas Denitrification Catalyst" included the waste flue gas denitrification catalyst (vanadium titanium series) into hazardous waste, clarified the management scope of waste flue gas denitrification catalyst, and opened the potential market for waste flue gas denitrification catalyst treatment and disposal。

On October 29, 2014, the "Implementation Plan for the Comprehensive Improvement of Energy conservation and Environmental Protection of coal-fired Boilers" put forward requirements for the upgrading of coal-fired industrial boilers in non-electricity industries for the first time after the thermal power industry significantly improved emission standards。

On December 27, 2014, the "Opinions on the implementation of third-party governance of Environmental pollution" focused on cultivating the third-party governance market, and the third-party governance work of the dust removal, desulfurization and denitrification industry is also being vigorously promoted。

The Action Plan for Energy Conservation and Emission Reduction Upgrading and Transformation of Coal Power Plants (2014-2020) (referred to as the "Plan") stipulates that the emission of air pollutants from newly built coal power plants in the eastern region basically reaches the ultra-low emission limit - the emission concentrations of soot, SO2 and NOx are no more than 10mg/m3, 35mg/m3 and 50mg/m3 respectively (under the condition of the benchmark oxygen content of 6%))，In principle, the newly built units in the central region are close to or reach the ultra-low emission limits，Encourage new units in the western region to approach or reach ultra-low emission limits;And to steadily promote the ultra-low emission transformation of active coal power units in the eastern region，Encourage the ultra-low emission transformation of existing coal-fired power units in other regions。At the same time, the "plan" supports the simultaneous joint and coordinated removal of air pollutants, and controls the emission of pollutants such as sulfur trioxide, mercury and arsenic。The "plan" opens the curtain of the upgrade of ultra-low emissions of coal power units, making ultra-low emissions the focus of air pollution control of coal power units in the next few years。

On December 2, 2015, the executive meeting of The State Council decided to fully implement the ultra-low emission and energy-saving transformation of coal-fired power plants, significantly reduce coal consumption and pollution emissions for power generation, and put forward specific targets。On December 9, 2015, the "Notice on Issues related to the implementation of the Ultra-low emission Electricity Price Support Policy for coal-fired power plants" stipulated that the coal-fired power generation enterprises that completed the ultra-low emission transformation were given feed-in tariff subsidies, which increased the motivation of coal power enterprises to upgrade ultra-low emission。

The Outline of the 13th Five-Year Plan for National Economic and Social Development of the People's Republic of China (abbreviated as the Outline) has put forward the concept of green development as never before, and the concept of green development is also permeated throughout the plan, raising environmental protection work to a new historic height。The "Outline" puts forward the tasks and goals of strengthening air pollution control and improving environmental quality, and proposes to continue to control the total amount of SO2 and NOx, and increase fine particulate matter as a binding indicator。The "outline" also puts forward key projects such as desulfurization, denitrification and dust removal transformation of coal-fired boilers, desulfurization transformation of iron and steel sintering machines, and denitrification transformation of cement kilns。