Hollingol City: Near-zero emission of electrolytic aluminum flue gas pollutants creates a miracle in the industry

On May 30th, Inner Mongolia Jinlian Aluminum Co., Ltd. Electrolytic aluminum flue gas near-zero emission demonstration project No. 1 absorption tower flue gas real-time monitoring system data showed that the inlet flue gas so2 concentration was 187.5mg/m3, and the outlet concentration was 18.5mg/m3. The inlet flue gas dust amount is 8.1mg/m3, the outlet is 0.7mg/m3; the inlet flue gas fluoride amount is 14mg/m3, and the outlet is 0.01mg/m3.

Guo Bin, deputy director of the aluminum power plant, said: This set of application of limestone gypsum wet purification technology in the power industry, deep treatment of electrolytic aluminum flue gas pollutant purification device produced by the electrolytic aluminum project, to achieve near zero emissions of pollutants in electrolytic aluminum flue gas The emission value is much lower than the national air pollution emission limit (Sulphur dioxide 100mg/m3, fluoride 3mg/m3, particulate matter 10mg/m3) implemented in the Beijing-Tianjin-Wing region, which is also much lower than the design standard of this demonstration project (sulphur dioxide 35mg). /m3, fluoride 0.3mg/m3, particulate matter 5mg/m3).

Guo Bin pointed to a long brown pipe: this pipe is 1.5 kilometers long and 6 meters in diameter. It is connected to the flue gas collection system of 4 electrolytic aluminum production units, and the other is connected to the demonstration project purification tower. More than a dozen technologies, such as leaching and 3-level high-efficiency dust removal, are discharged after treatment. Some people say that the white clouds are discharged here. The company's same system has been completed and put into operation 2 sets, and 8 electrolytic aluminum production units that have been put into operation have all achieved near zero emissions. The third purification system will be built and put into operation simultaneously with other electrolytic aluminum production units. Although the cost of this system has increased by 1.3% to 1.5%, we feel the value! Because of this system, the aluminum ingots and aluminum water we produce are all green and environmentally friendly crystals.

Hollingol is an industrial city built by coal and flourishing from coal. After more than 40 years of development, it has initially formed a relatively complete industrial chain of coal and aluminum and aluminum deep processing. In recent years, the city has firmly established the green water and green hills, which is the development concept of Jinshan Yinshan. The most stringent pollution prevention and control measures have been carried through the whole process of industrial development, and we are firmly committed to the path of green and low-carbon sustainable development, striving to realize blue sky, white clouds and modernity. Industrial harmony echoes, ecological beauty and economic development are harmonious and win-win. In 2016, the city was awarded autonomous region-level civilized city, garden city and sanitary city. In 2017, the number of days with excellent air quality reached more than 320 days, and it was awarded the ecological livable demonstration city of the autonomous region.

In 2017, the city's Inner Mongolia Huohai Hongjun Aluminum Co., Ltd., Inner Mongolia Jinlian Aluminum Co., Ltd. and Inner Mongolia Chuangyuan Metal Co., Ltd., three primary aluminum production enterprises took the lead in launching the near-zero emission demonstration project of electrolytic aluminum flue gas pollutants. This is the first case in China to apply the limestone gypsum wet purification technology in the power industry in the process of producing primary aluminum in the electrolysis process, to deeply treat the electrolytic aluminum flue gas pollutants produced by the electrolytic aluminum project, and realize the near zero of fluoride in the electrolytic aluminum flue gas. emission. The demonstration project not only further improved the ecological environment quality of the Huolin Gol area, provided pollution control technology support for the development of the coal-electricity aluminum industry, but also provided a replicable technical demonstration for the development of the national aluminum industry.

The city also cooperates with Shenyang Aluminum and Magnesium Design Institute and Northeastern University to collect gas collection system for electrolytic aluminum production workshops of electrolytic aluminum production enterprises, crane negative pressure, pole changing process, replacement tank cover, lifting negative pressure backflushing, tank Processes such as door baffle observation holes, increase in anode carbon block, and fluoride salt automatic feeding equipment have been reengineered to minimize unorganized emissions. At the same time, 18 of the 22 generator sets in the city have achieved ultra-low emissions, and will complete ultra-low emission transformation at the end of 2019; closed storage, closed operation, hardening and greening of the field in the coal industry The remediation work will also end in August this year. At that time, the city's coal industry will also achieve the goal of not storing coal, transporting coal without coal, and producing coal without burning.

According to Qi Baohai, deputy director of the Municipal Environmental Protection Bureau: In addition, we have comprehensively carried out special actions for the comprehensive utilization of industrial solid waste to realize the reduction, recycling and reuse of industrial solid waste. At present, the output of waste resources such as fly ash and desulfurization gypsum in the city's power plants is 3.9 million tons/year. In order to promote the recycling of resources, nine solid waste comprehensive utilization enterprises such as Lantian Weiye, Furunde and Jinzheng have been built successively. Through the production of aerated bricks, nanocomposite sheets, high-strength gypsum powder and other products, industrial solid waste recycling utilization capacity It has reached 3.63 million tons/year. In 2017, it has introduced 7 projects including Minghao High-strength Gypsum Powder, Luofei Federal Gypsum Board and Gerun Harmless Treatment Electrolytic Aluminum Solid Waste. It is planned to be put into production this year. By then, the industrial solid waste resources recycling capacity will reach 4.73 million tons / year, basically have the industrial solid waste resources to dry and squeeze. (Wang Kai Zhang Yan Qin Rong Song Ru Guo Hongshen)