"In February 2022, during the Beijing Winter Olympics, it was also in the northern heating season. PM2.5 should be reduced to 35 micrograms per cubic meter. It can be said that it is stressful and heavy." On July 21, at 2018 (the ninth) At the China Steel Energy Conservation and Emission Reduction Forum, Liu Bingjiang, Director of the Department of Atmospheric Environment Management of the Ministry of Ecology and Environment, could not help but sigh.
Not long ago, the State Council officially issued the "Three-Year Action Plan to Win the Blue Sky Defence War" (hereinafter referred to as the "Three-Year Action Plan"), and proposed that after three years of efforts, the total amount of major air pollutants will be greatly reduced, and greenhouse gas emissions will be reduced. Further significantly reduce the concentration of PM2.5, significantly reduce the number of days of heavy pollution, significantly improve the quality of the ambient air, and significantly enhance the people's blue sky happiness.
At the same time, a few days ago, the Ministry of Ecology and Environment also issued the "Enterprise Ultra-low Emissions Reconstruction Work Plan (Draft for Comment)", which is also referred to by the industry as the most stringent "ultra-low emission" in China.
From the initial "playing well" to the current "winning", the difference between the words shows that the government has made great efforts and resolves to solve the "heart and lungs" of the people. As a key area of ​​atmospheric governance - industry, in order to achieve "blue sky happiness", ultra-low emissions are imminent.
Environmental issues are receiving unprecedented attention
Li Xiaoliang, director of the Industrial Environmental Policy Research Office of the Environmental Policy Department of the Environmental Planning Institute of the Ministry of Ecology and Environment, said that environmental protection is one of the main factors determining the health status, potential and risks of the government, the public, downstream manufacturers and market institutions. Basic and quality, profit and scale. The advanced nature of technology and other factors have become the same ruler and must-have for the "three major pieces."
In recent years, the Chinese government has raised the construction of ecological civilization to an unprecedented height. The 19th National Congress listed pollution prevention as one of the three major battles, and clearly stated that the goal of reducing sulfur dioxide and nitrogen oxide emissions by 3% in 2018 is to save energy in the industry. Emission reduction, transformation and upgrading have put forward higher requirements.
Li Xinchuang, dean of the China Metallurgical Industry Planning and Research Institute, said that although the emissions of sulfur dioxide, particulate matter and other pollutants in China's industry have fallen by more than 60% in the past decade, due to the large steel output in China, the industry's sulfur dioxide, nitrogen oxides, Particulate matter emissions ranked third, third and first in all industrial sectors, and remained the main battlefield for the blue sky defense war.
"For example, enterprises have different environmental protection levels, such as Baosteel and Taigang, which have reached the world's advanced level, and there are also a number of backward enterprises with serious pollution and low environmental awareness. After several years of governance, the most concentrated Chinese enterprises in the Beijing-Tianjin-Hebei region The concentration of PM2.5 dropped significantly, but it still did not completely get rid of the impact of heavy pollution, and the haze weather was still repeated." Li Xinchuang said.
He said that the construction of ecological civilization in the industry is in a critical period of pressure superposition and weight-bearing advancement. First, the company's peak production and normalization limit production increase production costs and increase environmental protection operation costs. Second, more and more places put pressure on the relocation of urban steel plants; third, emission indicators, monitoring requirements, total indicators, environmental taxes Fees and other standards have been tightened, and environmental law enforcement and supervision have been intensified.
In addition, the "Three-Year Action Plan" also proposed that it is strictly forbidden to increase new production capacity in key areas, and at the same time accelerate the migration and transformation of heavy pollution production capacity in urban built-up areas, strictly implement implementation measures for capacity reduction and replacement in other industries, and increase the elimination of backward production capacity. Excessive capacity reduction. Specifically, it is mentioned that key areas will increase the elimination of independent coking enterprises, and Beijing-Tianjin-Hebei and surrounding areas will implement “steeling with steel†and strive to achieve a coking capacity ratio of around 0.4 in 2020.
"Industry pollution prevention is not only a tough battle, but also a protracted war." Li Xinchuang said, "You can't just take environmental protection as a 'red line', you should take environmental protection as a 'leading'. Under the new environmental protection situation, you can't just pass the exam, but you must fight for it. Full marks."
It’s better to do ultra-low emissions late.
In the history of the most stringent "ultra-low emissions" in terms of advancement time, the Beijing-Tianjin-Hebei atmospheric transmission channel cities, the Yangtze River Delta, the Plains and other places to strive to complete ultra-low emission transformation by the end of October 2020, by 2025, all of the country Companies with transformational conditions strive to achieve ultra-low emissions.
Li Xiaoliang said that the Ministry of Ecology and Environment will also urge 100% of the key pollutant discharge units in the industry to install automatic monitoring facilities, network with the environmental protection departments, and disclose pollutant discharge information on the national unified platform.
It can be said that more and more fine, comprehensive and strict environmental management, corporate environmental information is becoming more and more transparent, and more and more applications are concerned. For enterprises, it is a challenge and a greater opportunity.
In order to achieve ultra-low emissions, Hegang Group has carried out a series of energy-saving and environmental protection transformations. The steel mill with an annual output of 13 million steel is only equivalent to the emission level of steel mills with an annual output of 3 million tons of steel.
“All our sintering machines have realized waste heat recovery. The tail, batching, crushing and screening are dedusted by high-efficiency dust removal device to achieve ultra-low emission level. In addition, all blast furnace tapholes, slag ditch and iron trench are completely sealed. The iron field adopts the 'one use and one spare' dual dust collector to achieve ultra-low emission standards of 10 mg/m3," said Jia Guangru, deputy general manager of Hegang Group.
In terms of energy efficient conversion, Hegang Group's Handan Iron and Steel Co., Ltd. took the lead in adopting gas-fired combined cycle power generation (CCPP) technology, which increased power generation efficiency by 10 percentage points and CCPP power generation accounted for more than 40%. In addition, the steam turbine cold-end system is optimized to optimize energy-saving technology to improve power generation efficiency and generate more than 20 million kWh of electricity annually.
Shandong Guosheng Construction Group Co., Ltd. (hereinafter referred to as Shandong Guoyu) is also actively exploring the implementation of ultra-low emission technology routes. For example, in the aspect of desulfurization, Sun Deshan, the assistant to the chairman of the board, said bluntly that the stubborn disease of sintering desulfurization is not the wet method, but the bean curd residue project. “The wet flue gas discharged from the wet desulfurization is only the problem surface, the dry electrostatic precipitator runs poorly, and the sintering exhaust smoke The high temperature and the low quality and low price of the desulfurization facilities have led to the nickname of the wet process.
To this end, Shandong Guosheng is also carrying out special rectification of sintering desulfurization facilities. Through the process technology of “SCR desulfurization + gypsum wet desulfurization + wet electric dedusting + condensation whiteningâ€, the sintering flue gas SO2, NOX, particulate matter and ammonia escape are realized. Integrated treatment of six pollutants, dioxins and plumes.
"China's industry has entered a period of reduced development. In the future, some enterprises will have to withdraw. Under the guidance of differentiated environmental protection policies, the process of production capacity and production limits will be linked to the level of environmental protection. 'Everyone is almost the same'. The idea of ​​“reserving the public†is no longer in line with the current environmental protection situation.†Li Xinchuang said that steel mills must meet ultra-low emission standards in all processes, all-factor, organized, unorganized off-site transportation and in-plant transportation. Implementing a lean environmental protection strategy and striving for a “green development benchmarking enterprise†can win the space for survival and development.
"Environmental protection work has to be done sooner or later, it is better to do it later than at night." Li Xinchuang said.
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