At the end of September 2024, Yunmei Energy's 2 million tons/year coking environmental protection relocation transformation and upgrading project (hereinafter referred to as the "project"), located in the southwest of Anning Industrial Park adjacent to Kunshan Iron and Steel New Area, successfully passed the completion acceptance. With a total investment of about 3.562 billion yuan, the project was officially approved in October 2020, and in the past four years, Yunmei Energy (600792.SH) has worked hard to overcome difficulties such as tight construction period, long-term rainy season and three-year epidemic, and was put into operation in October 2022 and successfully passed the completion acceptance at the end of September this year, marking a "domestic first-class, internationally advanced, and world-leading green intelligent coking boutique project" officially entering a new stage of production and operation.
It is reported that the main construction of the project is mainly coal preparation system, coking facilities and coke treatment system, desulfurization and denitrification device, gas purification device and other production facilities, supporting the remaining coke oven gas power generation and utilization projects, as well as the corresponding public auxiliary facilities of the whole plant; Including the coking project, two new large-scale top-loading coke oven production lines with a height of 7.6 meters in carbonization chambers, supporting 3×140t/h dry quenching facilities and three 65t/h waste heat boilers + 2×18MW waste heat generator sets, 1 set of coke oven flue gas desulfurization and denitrification purification device, gas purification device, coal preparation and public auxiliary facilities, etc., with an annual output of 2 million tons of dry coke, and 2×180t/h gas boiler + 2×60MW steam turbine + 2×60MW steam turbine generator for the remaining gas power station in the power generation project. The project covers the construction of the whole chain from coal preparation, coking, CDQ, CDQ waste heat power generation, coke oven flue gas desulfurization and denitrification, coke oven riser waste heat recovery, gas purification, residual gas power generation and sewage treatment.
The project has introduced the first 7.6m top-mounted coke oven in China, which has attracted widespread attention in the industry since its construction and commissioning, which is far better than the same type of coke oven in terms of production capacity, energy consumption and environmental protection emissions.
According to Yunmei Energy, as of August 2024, the project has produced a total of 3,057,400 tons of coke, 163,000 tons of chemical products, and sold 945 million m³ of gas. The maximum number of coke ovens produced in a single day reached 132, the maximum number of dry quenching coke power generation reached 730,000 kWh, and the maximum number of gas power generation reached 2.97 million kWh; The quality of coal tar, crude benzene, ammonium sulfate, coke oven gas and other products is stable and meets the requirements of the national standard; The recoveries of crude benzene and ammonium sulfate continued to increase and exceeded the design level. In addition, the strength index of coke after hot reaction can be flexibly adjusted between 66-70% according to the demand for coke in the blast furnace, with the stability of M40 being greater than 92% and M10 being stable below 4%, ranking first among the 139 member coking enterprises of the Coking Association in 2022.
In terms of energy consumption, the energy consumption of the coking process has been stable at 107kgce/t, which has been better than the industry benchmark level for 18 consecutive months since it was put into production.
From the perspective of economic benefits, the annual sales revenue of the project in 2023 will be 5.209 billion yuan, and in terms of social benefits, the completion and operation of the project will form an industrial chain coupling effect with two 2,500m3 blast furnaces in the first and second phases of Wukun Iron and Steel, breaking the bottleneck of blast furnace coke supply, increasing the chain, supplementing the chain and strengthening the chain, and enhancing the regional competitiveness of the steel industry chain. At the same time, the project has also achieved remarkable results in environmental protection and energy saving, and has made positive contributions to the demonstration of coking environmental governance.
In this regard, Yunmei Energy said that the company's 2 million tons/year coking environmental protection relocation transformation and upgrading project, as an important step to promote the comprehensive utilization of resources and the upgrading of the environmental protection industry, will not only greatly improve the utilization efficiency of coal resources, but also be a key measure to realize the combination of steel and coke and build a new energy-saving, environmental protection and ecological industrial production base. The project will strongly promote the quality, efficiency and power transformation of the iron and steel industry, ensure the safety and stability of the industrial chain and supply chain, and contribute to the sustainable development and environmental protection of the metallurgical industry. After the completion of the project, the economic evaluation results showed that it was good, and the social benefits reached the expected goals.
"In the future, Yunmei Energy will further increase scientific and technological innovation, improve product quality and market competitiveness, actively promote green and low-carbon development, and lay a solid foundation for the sustainable development of the enterprise and the company's strategic goals." At the project acceptance meeting, Yunmei Energy said.