As my country's coal-fired power plants achieve ultra-low emissions, the emission reduction effect is significant. The emission of major smoke pollutants in the non-electricity industry remains high and difficult, becoming the focus of air pollution control and the key to improving regional air quality.

Li Junhua said that my country’s non-electrical industries, including iron and steel, non-ferrous metals, cement, glass, and ceramics, account for half of the world’s industrial production capacity. However, the non-electrical industry has implemented relatively loose environmental protection policies for the long-term implementation of major flue gas pollutants, causing major air pollution. The total amount of emissions is large, and it is inevitable that the focus of air pollution control will shift to non-electrical industries. However, the ultra-low emission limits of different non-electric industries should be formulated according to the technological processes of different industries and the new progress of domestic and foreign governance technologies, and the ultra-low emission limits of various industries supported by their own new technologies or feasible technologies should be formulated instead of The PM, SO2, and NOx emission concentrations of the power industry shall not exceed the ultra-low emission standards of 10, 35, and 50 mg/m3 respectively. It is necessary to comprehensively consider the emission concentration of the main pollutants after the manufacturing process, combined with the use of the current advanced terminal treatment technology, to give the ultra-low emission limit. For example, if the nitrogen oxide concentration is 250mg/m3 before the treatment of the end of steel sintering flue gas, combined with effective SCR denitrification technology, the denitrification efficiency is guaranteed to be more than 80%, and it is expected to achieve ultra-low emission of 50mg/m3; the source emission of the glass industry is Above 1000mg/m3, even if the denitration efficiency is 80% or even 90% guaranteed, the ultra-low limit must be around 200mg/m3. Similarly, the determination of ultra-low emission limits for heavy-polluting industries such as coking and cement must also be determined in accordance with the pollutant emission characteristics and treatment technologies of the respective industries, and a set of ultra-low emission limits cannot be adopted.

With the successful experience of ultra-low emissions in the existing electricity, can the flue gas treatment technology in the non-electric industry be copied? Li Junhua believes that flue gas treatment is a systematic project, involving source emission reduction, process control and end treatment. Pollutants include conventional sulphur and nitrate dust and a series of unconventional pollutants, which require efficient and coordinated purification of multiple pollutants. In addition, not only technical issues, but also economic and social factors. Non-electricity industry flue gas treatment cannot simply copy the ultra-low emission of electricity.

Ultra-low emission of electric power can be carried out quickly and effectively. First, it has a good scientific and technological foundation with the power industry's flue gas treatment. Second, the conditions for power plant flue gas emission are relatively stable. Third, incentive policies such as environmental protection electricity price subsidies are in place. Fourth, power companies Most of them are state-owned companies, and the overall level of big data supervision is relatively high. Many factors have led to the enthusiasm of power companies to upgrade and reform ultra-low emissions, and the non-electric industry is different from the power industry.

Li Junhua further stated that first of all, compared with electricity, the transformation of ultra-low emissions in the non-electricity industry is more complicated. This is manifested as: First, there are many emission sources in the non-electric industry, including many industries such as steel, cement, coking, non-ferrous metals, and glass; Second, the process of each industry is different, and the types of pollutants discharged are complex, and the flow and concentration of the pollutants vary greatly; Third, the temperature, humidity, flow rate, and flow rate of different industrial flue gases fluctuate greatly.

Again, technical support is insufficient. Each industry involved in non-electricity has its own characteristics. From the perspective of technical adaptability, a technology or a set of technologies must meet the emission characteristics of various non-electric industrial pollution sources, and it is conceivable that it is difficult to achieve ultra-low emissions. There are also economic issues. Insufficient investment in environmental protection in the non-electricity industry may be due to the poor efficiency of certain industries. More importantly, the lack of corresponding environmental protection incentive policies and the high cost of compliance for companies with in-depth ultra-low emission governance. In short, many factors have led to the slow progress of in-depth management of flue gas in the non-electricity industry.

Driven by environmental pressure and incentive policies, it is a general trend for the flue gas treatment market to shift from electricity to non-electricity, and the non-electricity industry will be the next main battlefield for atmospheric governance.