In recent years, the pace of green transformation of China's manufacturing industry has been accelerated, the construction of green manufacturing system has been further promoted, and green industry is becoming the driving force for the high-quality development of industrial economy.
In the wave of green transformation of traditional manufacturing industry, the cement industry also grasps the pulse of the times, not only in terms of quality and efficiency, but also in terms of green and low-carbon, contributing an important force to the realization of carbon peak and carbon neutralization in the industrial field.
However, with the continuous decline of cement demand, the increasingly prominent contradiction of excess capacity and the reduction of profits in the whole industry, how to control the best balance between enterprise efficiency and green upgrading has become an urgent problem for many cement enterprises. At the same time, as a major carbon emitter, how can cement industry achieve the goal of "double carbon" to meet the development needs of the industry in the new era? The theme of this
conference is "innovation-driven pollution reduction, carbon reduction and green development". Lv Wenbin, President of Hunan Building Materials Federation, Party Secretary of Hunan Cement Association, Party Secretary, Chairman and President of New Tianshan Zhongnan Cement; Zhang Zhenkun, Chairman of China Cement Network and CEO of Asia Cement (China) Holding Company; Chen Zhongsheng, Vice President of Shandong Shanshui Cement Group Co., Ltd., Chairman Unit of China Cement Network; Wu Shangan, Professor-level Senior Engineer of Hefei Cement Research and Design Institute, former Secretary-General of Bag Committee; Wang Zuojie, Professor of Tianjin Cement Industry Design and Research Institute; Li Weidong, Vice President of Ningxia Building Materials Group Co., Ltd.; Fan Shaojie, Executive Vice President of Shijiazhuang Quzhai Cement Co., Ltd., Chairman of China Cement Network; Jia Huaping, Senior Consultant of China Cement Network; Wang Wenhui, General Manager of Henan Tailong Building Materials Group Co., Ltd., Chairman of China Cement Network; Deng Wei, Chairman of Henan Sinoma Environmental Protection Co., Ltd.; Wu Xiaohuan, Vice General Manager of China Gezhouba Group Cement Co., Ltd., Chairman of China Cement Network; Sinoma continues to innovate, green cement is growing
towards high-quality development, and green manufacturing is implemented in an all-round way." It is not only an inevitable choice to promote new industrialization, but also a key link for the high-quality development of cement and other manufacturing industries.
Hefei Cement Research and Design Institute and former Secretary-General of the Bag Committee, also said that the green development of the cement industry is the need of social development, and the state has issued relevant policies and regulations. For example, the Ministry of Industry and Information Technology and the Ministry of Ecology and Environment have issued a number of policies and regulations, such as the "14th Five-Year Plan for Green Industrial Development" and the "Implementation Plan for Cooperative Efficiency of Pollution Reduction and Carbon Reduction", to make it clear that by 2025, the green transformation of industrial structure will achieve remarkable results, green low-carbon technology and equipment will be widely used, and the utilization level of energy resources will be steadily improved. Carbon emissions are people-oriented and the intensity of pollutant emissions is further reduced.
To promote the green and low-carbon development of cement industry, technological innovation is an important support.
Taking the emission reduction of nitrogen oxides as an example, it has become the voice of cement enterprises to find a stable, efficient and ammonia-free technical path. At the meeting, many participants gave their own answers. Wang Zuojie, a professor of
Tianjin Cement Industry Design and Research Institute, said that there are many ways to solve the ultra-low emission of cement waste gas. Once the strict ultra-low emission policy is enforced, the end treatment is the most important. To achieve ultra-low emission of nitrogen oxides, SCR catalytic denitrification technology is the inevitable choice; The micro-dust high temperature SCR scheme is the most worthy of discussion of the reliable way of denitration; FSCR preheater top technology achieves ultra-low emission of cement waste gas dust and nitrogen oxides, emission reduction and carbon reduction, which is an innovation of environmental protection technology and a revolution of cement production technology. Shao Mingzhu, deputy general manager
of Sinoma Zhuzhou Cement Co., Ltd., pointed out that the key for the dust collector to achieve ultra-low dust emission is to reduce the filtration wind speed and improve the dust removal efficiency; the ammonia spray gun is usually arranged at the cone of the C5 cyclone in the precise denitration technology, which is easy to cause skinning of the spray gun and the risk of blocking the feeding pipe; Staged combustion technology can effectively reduce NOx emissions, but it has an impact on the stability of kiln conditions. Easy to cause " Lei Hua, senior technical specialist of Xi'an Longjing Environmental Protection Technology Co., Ltd. SCR denitrification technology is a real terminal deep treatment technology, with denitrification efficiency of more than 90% and NOx emission concentration of less than 50 mg/Nm3 or even 30 mg/Nm3 , which meets the environmental protection needs of ultra-low emissions. It is generally recognized as the most efficient and reliable deep denitrification technology. Zhang Chao, Vice President of
Tianjin Chaoyang Environmental Protection Technology Group Co., Ltd., said that the treatment effect of cement industry directly affects the improvement of atmospheric environment. Thermal carbon catalytic reduction composite denitrification technology + tail-end super purification (ACCR) can reduce NOx by 20%, SO2 by 80% and ammonia escape by more than 99% on the basis of front-end treatment, which can fully meet the requirements of ultra-low emission targets. The operating cost is only increased by about 1 yuan/ton of clinker, leaving room for meeting more stringent environmental requirements in the future.
China's cement industry is the key industry of carbon dioxide emissions, and the signal that the cement industry will soon be included in the national carbon market is constantly clear. Under the background of carbon peak and carbon neutralization, the cement industry has an arduous task of emission reduction and is facing new opportunities for development. Dr. Song Xinke, School of Environment,
Tsinghua University, shared that under the vision of carbon neutrality, the cement industry is the focus of carbon emission control. The main decarbonization measures in the cement industry include energy efficiency improvement, alternative fuels, alternative materials, clean electricity, CCUS (Carbon Capture, Utilization and Storage), etc.
Song Xinke pointed out that the dual-carbon target has put forward requirements for the deep decarbonization transformation of the cement industry; improving energy efficiency is the most effective "no regrets" measure at the current stage with mature technology; it is expected that the carbon emissions of the cement industry will peak in the middle of the "14th Five-Year Plan", and the emissions in 2030 will be reduced by 15% -18% compared with 2020; Under the vision of carbon neutrality, the cement industry has a difficult task to achieve net zero emissions, and needs to deploy CCUS and other emerging decarbonization technologies. At present, there are some commercial application cases of new decarbonization technologies around the world, which make it possible for the industry to achieve zero or even negative emissions. Under the strategic goal of
"double carbon", technologies such as deep decarbonization, alternative fuels and renewable energy in cement industry have also attracted considerable attention.
alternative fuels, Gao Yuzong, senior consultant of China Cement Network, said that the use of alternative fuels in China's cement industry has great potential for development. Most cement companies are still not using alternative fuels. Under the current technical conditions, it is technically feasible for China's cement industry to achieve a fuel substitution rate of about 40%. It is not excluded that individual enterprises in individual regions can achieve a substitution rate of 80% or even higher under special conditions. The final substitution rate mainly depends on the market and policies.However, at this stage, we should focus on promoting biomass alternative fuels. Lu Shoujiang, deputy general manager of
Suzhou Shijing Science and Technology Co., Ltd., shared in his speech that the main technical ways of carbon neutralization in cement industry are: using less concrete in structure, using less cement in concrete, using less clinker in cement, and emitting less carbon dioxide in clinker production. Shijing Science and Technology independently developed the resource utilization of steel slag to capture CO2 at low cost and the synergistic preparation of low-carbon cement, using metallurgical solid waste steel slag to capture CO2 in industrial tail gas (cement kiln, etc.), through special processes and special catalysts. The treated steel slag is used as admixture to produce low-carbon cement, which has good social and economic benefits. When the
blueprint is drawn, it is time to forge ahead. Only by unswervingly taking the road of green and low-carbon development and promoting the development of higher quality, more efficient, more low-carbon, more sustainable and safer, can cement industry make green the most distinctive, heavy and reliable background in cement production.
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