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According to Sinochem New Network, recently, the first domestically produced million-ton-class methanol synthesis reactor, manufactured by Dalian Heavy Industry Equipment Group, passed the factory acceptance tests and was successfully delivered to the site of the coal-to-olefins upgrading demonstration project at Guoneng Baotou Company. This marks a breakthrough by our country in breaking the foreign technological monopoly in the field of core equipment for large-scale coal chemical industries, thereby laying a solid foundation for the high-quality development of the coal-to-olefins industry. From an industry perspective, coal-based olefins represent a key area in China’s energy structure transformation. As a key industry for reducing dependence on oil and making efficient use of coal resources, it has extremely stringent technical requirements for its core equipment. “As the \"heart component\" of the coal-to-olefins production chain, the methanol synthesis reactor directly determines the capacity, efficiency, and safety of the project. ”The person in charge of the project team at Dalian Heavy Industry Equipment Group explained that previously, the technology for reactors with a capacity of over one million tons was under foreign control worldwide. This led to high costs for equipment procurement, long delivery times, and limited opportunities for maintenance, all of which became barriers to the large-scale and high-end development of coal-to-olefins projects in China. The million-ton methanol synthesis reactor is precisely Dalian Heavy Industry’s solution aimed at addressing the industry’s key challenges. The design pressure for the stage 1 and stage 2 synthesis reactors of this equipment is 8.8 MPa, while the hydrostatic test pressure for the shell side reaches 13.1 MPa; each of these values represents the highest standards for similar equipment in China at present. To address the challenges associated with manufacturing equipment with extremely large diameters and thick walls, the team developed specialized techniques for forming large-thickness Cr-Mo steel end caps, replacing welds, and carrying out tailored heat treatment processes, thereby ensuring that the key components achieve ultra-precise accuracy ； The innovatively designed high-temperature differential expansion joint can handle severe temperature fluctuations during equipment operation, thereby significantly extending its service life ； A customized protection solution for the transportation of oversized containers ensures that \"extra-large equipment\" is delivered to the site without any damage, from the workshop to the destination. Technological breakthroughs not only enable the equipment to achieve performance on par with world-class standards, but also offer a significant advantage in terms of cost efficiency – compared to imported equipment, the manufacturing time is reduced by 12 months, and the cost per ton is reduced by over 20% compared to similar foreign products, thus saving customers a great deal of time and money in bringing their projects to fruition. For core coal chemical enterprises such as Guoneng Baotou, the implementation of this reactor is of great significance. As the core equipment of this demonstration project for upgrading coal-based olefins, it will directly enable the project to achieve efficient and low-cost production. It is capable of converting coal resources into high-quality olefin raw materials on a steady basis each year, providing sufficient supply for downstream industries such as plastics, rubber, and fibers. This not only enhances the production efficiency of enterprises but also contributes to the implementation of energy security strategies. Zhang Yifeng