Chongqing promotes the performance rating of air pollution prevention and control of enterprises in key industries
Recently, the monitoring concentration of environmental pollutant emissions in the plant area of Chongqing Conch Cement Co., Ltd. (hereinafter referred to as Chongqing Conch) in Zhongxian County showed that nitrogen oxides were less than 50mg/m3, sulfur dioxide less than 35mg/m3, particulate matter less than 10mg/m3to meet the national ultra-low emission limit.
According to reports, in order to fight the tough battle of "gas control", in 2023, Chongqing will promote the performance rating of air pollution prevention and control of enterprises in key industries, and evaluate 1 A-level enterprise and 27 B-level enterprises. Chongqing conch is recognized as Grade A.
The sky is bright and the grass is green (Photo courtesy of the Propaganda Department of Zhongxian County Party Committee)
"The performance classification of key industries is the basic work for the implementation of differentiated management and control of enterprises in the emergency response to heavily polluted weather. Companies with advanced environmental performance can reduce or eliminate emergency response measures. For example, on December 29, Zhong County issued a yellow warning for heavy pollution weather, and Chongqing Conch, as an A-level enterprise, did not limit production and stop production, but took independent emission reduction measures. As far as the cement industry is concerned, in the case of a yellow warning for heavy pollution weather, if it is a B-level enterprise, it will stop using heavy trucks of China IV and below, C-level enterprises will stop production by 50%, and D-level enterprises will stop production completely. According to the relevant person in charge of the Chongqing Municipal Bureau of Ecology and Environment, the worse the environmental performance level of the enterprise, the stricter the control during the emergency period of heavy pollution weather, and truly realize "more emissions and more restrictions, less emissions and less restrictions, and no emissions and no restrictions", so as to encourage "advanced" and spur "backward", and promote industry transformation and upgrading and high-quality development.
Performance grading and rating Promote the green transformation and upgrading of enterprises
Walking into Chongqing Conch, the lush grass and green trees can be seen in the clear vision, subverting people's stereotype of the gray cement factory.
All this is thanks to the ultra-low emission transformation of pollutants carried out by Chongqing Conch. According to reports, Chongqing Conch took the lead in implementing the transformation of the high-temperature SCR flue gas denitrification system, and the nitrogen oxides were stably controlled at 50mg/m3The following three lines can reduce nitrogen oxide emissions by 960 tons per year, and the ammonia escape emission concentration can be stably controlled at 5mg/m3Hereinafter. At the same time, three sets of limestone/lime-gypsum wet flue gas desulfurization systems were newly built, which stabilized the desulfurization efficiency at more than 93.15%, and controlled the sulfur dioxide emission concentration in the kiln tail gas to 35mg/m3Within that, ultra-low sulfur dioxide emissions can be realized, and 800 tons of sulfur dioxide can be reduced every year. The electric precipitator at the kiln head and kiln tail of the clinker production line was also technically transformed and replaced with a bag dust collector to make the particulate matter emission concentration lower than 10mg/m3and take unorganized control measures such as corridors and storage yards, automatic cement packaging, automatic loading, stacking and loading on ships, cleaner production, and transportation to control the unorganized emission of particulate matter to the greatest extent.
Jiulong Wanbo New Material Technology Co., Ltd. (hereinafter referred to as Jiulong Wanbo), located in Wanzhou, is actively applying for the performance rating of air pollution prevention and control of enterprises in key industries. In March 2022, the company gradually completed and put into operation a new special aluminum material project with an annual output of 3.6 million tons, featuring ultra-low emissions and comprehensively promoting supply-side reform, leading the green and low-carbon development trend of the alumina industry.
"Because it is a new company that has been put into production, we have a lot of late-mover advantages, and we are the only abrasion production enterprise with the lowest comprehensive energy consumption and emissions in the same industry in China, and the only abora production enterprise with surplus electricity on the grid (300 million kWh/year)." The relevant person in charge of the company said.
It is understood that the introduction of the most advanced process equipment at home and abroad in the production process of alumina can save more than 320,000 tons of standard coal and reduce carbon dioxide emissions by more than 830,000 tons every year, achieving an ultra-low level of carbon emissions. As the key emission point, the roaster controls the emission concentration of particulate matter at 5mg/m3 and sulfur dioxide at 5mg/m through the system of multi-stage cyclone dust removal (process comes with it) + "SNCR+SCR denitrification" + "electric bag dust removal device".3, nitrogen oxides are stably controlled at 50mg/m3Hereinafter.
"At present, we are under the guidance and help of the Municipal Bureau of Ecology and Environment and the Municipal Economic Information Commission, to carry out a new round of technological transformation and upgrading, mainly the flue gas waste heat of the roaster will be recycled and reused, further energy saving, emission reduction, carbon reduction, the current technical transformation project has been under construction. The relevant person in charge of the company said.
Take multiple measures to fight the tough battle of air pollution prevention and control in depth
In August 2023, the Beautiful Chongqing Construction Conference was held, and the new Chongqing "Beautiful Plan" was proposed, which will promote the "nine governance" in an integrated manner - water control, gas control, soil control, waste control, plastic control, mountain control, shore control, city management, and township management, and make every effort to build a beautiful China pilot area.
"Qi control" is an important task in the new Chongqing's "Beautiful Plan", and the performance grading of key industries is only one of the key measures in Chongqing's in-depth "gas control" battle.
In 2023, Chongqing will decompose and issue more than 2,000 pollution source emission reduction engineering measures and tasks in 6 categories, focusing on the in-depth treatment of volatile organic compounds and industrial furnaces, the elimination of old vehicles and the promotion of pure electric vehicles, the supervision of construction dust, and the control of catering fumes and open burning. Strive for about 335 million yuan of special funds for air pollution prevention and control at the central and municipal levels, encourage enterprises to carry out in-depth treatment, and complete more than 130 volatile organic compounds (VOCs) enterprise governance, in-depth treatment of key enterprises, boiler clean energy transformation or low-nitrogen combustion transformation.
At the same time, the Municipal Bureau of Ecology and Environment has also improved the 3+5+7 supervision and assistance mechanism, guiding more than 2,900 enterprises and helping to solve more than 8,000 problems. Comprehensively promote the implementation of eight preferential policies for enterprises, in-depth treatment subsidies for special air funds, free monitoring, tax reductions and exemptions, etc.
In addition, we will carry out special actions for joint prevention and control of air pollution in the adjacent areas of Sichuan and Chongqing, and jointly promote the staggered production of 120 cement enterprises in Sichuan and Chongqing. Jointly compile and complete the air pollutant emission standards for the glass, ceramics and cement industries, and realize the simultaneous compilation of air pollutant emission standards and the same regional emission limits.
According to reports, in 2023, the number of days with good air quality in Chongqing will reach 325 days, the number of good days will be stable at more than 320 days for 4 consecutive years, and there will be no heavy pollution days for 6 consecutive years since 2018, and the number of days with ozone exceeding the standard throughout the year will be the best level since monitoring.
Beautiful Chongqing (photo by Zhang Zhi)
The relevant person in charge of the Chongqing Municipal Bureau of Ecology and Environment said that in the future, it will continue to promote high-level protection and high-quality development by improving air quality, and coordinate the establishment of a work system such as management emission reduction, engineering emission reduction, and policy emission reduction, focusing on fine particulate matter (PM).2.5), nitrogen oxides (NO2), volatile organic compounds (VOCs) and other key emission reduction indicators, focusing on supervision and assistance, project transformation, and hierarchical management and control of enterprises, continue to optimize the three major structures of industry, energy, and transportation, and further promote the in-depth governance of key industries such as cement, glass, and ceramics, and give full play to the digital intelligence of "Bayu gas control", as well as technical means and administrative forces such as monitoring, supervision, and law enforcement, and work together to continuously improve the air quality of our city.
According to reports, in 2023, the number of days with good air quality in Chongqing will reach 325 days, the number of good days will be stable at more than 320 days for 4 consecutive years, and there will be no heavy pollution days for 6 consecutive years since 2018, and the number of days with ozone exceeding the standard throughout the year will be the best level since monitoring.
