Nitrogen and denitrification in the cement industry is under pressure

Nitrogen and denitrification in the cement industry must withstand pressure In recent days, the Ministry of Environmental Protection issued 14 China Cement Labeling Products Low Carbon Cement Product Demonstration Certificates to 14 cement production companies. The cement companies that have won this award have not made any outstanding contributions to environmental protection, especially to reduce energy resource consumption and reduce Carbon dioxide emissions have great guiding significance. At the same time, the environmental labeling standards also set requirements for the restoration of mines. After the cement plants are completed, they must achieve a mine repair rate of 100%.

Controlling the carbon dioxide emissions of the cement industry will play a major role in achieving the national goal of controlling greenhouse gas emissions. If the cement industry fully implements the certification of environmental label products, it will estimate that at least 20.7 million tons of carbon dioxide will be reduced annually, based on 30% of the total amount of environmental label products. .

Similarly, controlling the emissions of nitrogen oxides from the cement industry is of great significance for achieving the state's goal of controlling nitrogen oxide emissions. On June 5 (World Environment Day) this year, at the press conference held by the State Office of New Zealand on the state of environmental quality and other aspects. Wu Xiaoqing, the deputy minister of the Ministry of Environmental Protection, said that in 2011 China's nitrogen oxide emissions were 24.043 million tons, an increase of 5.73% compared with 2010, and emissions did not fall, but the cement industry has also become a step after the thermal power. The second largest nitrogen oxide emissions industry. Therefore, if we can effectively control the emissions of the cement industry, the effect of reducing the overall emissions will be very obvious, and all this can be done.

It is understood that since the release of nitrogen from nitrogen and nitrogen in the cement industry, demonstration lines for denitrification of cement production lines have been established in Hebei, Shaanxi, Ningxia, Sichuan, Chongqing, Guizhou, Hunan, Guangxi, Zhejiang, Anhui, and Fujian provinces. The technological transformation of the production line has greatly reduced the emission of nitrogen oxides. For example, the Fujian Longlin 6000t/d production line has a denitrification efficiency of 65%, and the emission concentration value drops to 185mg/Nm3. After the denitrification of the 2000t/d production line of Guangxi Sepangnan, the emission concentration value is reduced from 1200~1650mg/Nm3 to 200~. 350mg/Nm3; After the denitrification renovation of the 2500t/d production line in Xianyang, Shaanxi, the emission concentration value is stable below 400mg/Nm3; the denitrification efficiency of the 2500t/d production line of Ningxia Pinglu Hengda reaches 50~60%; the conch is in Chongqing and Wuhu After the denitrification of the production line, the denitrification efficiency is 35% and 30%, respectively.

Denitrification transformation demonstration line is to demonstrate effect for the entire cement industry, and will be promoted to the entire industry when appropriate. Since the demonstration production line can greatly reduce the emission of nitrogen oxides, there is no reason why other production lines cannot be reduced. Once cement companies complete the control of nitrogen oxides once they are promoted throughout the cement industry, their role in environmental protection will be enormous.

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