【Ten Years of Rapid Development in Chemical Equipment】The air separation unit for the China Coal Yulin Coal Deep Processing Base project, which is the largest electrically driven air separation unit in China, has successfully completed its mechanical construction phase

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Give praise and encouragement to the achievements made in China’s chemical engineering technology and equipment; your participation in discussions is the greatest encouragement. **********************【Ten Years of Great Development in Chemical Engineering Equipment】Ongoing updates and summaries are available; feel free to join the discussions: https://bbs.hcbbs.com/thread-3576046-1-1.html *****************On December 17th, the air separation unit of the China Coal Yulin Coal Deep Processing Base project, which was overseen by Hualu Company of China Chemical Engineering, was successfully completed in terms of mechanical construction. The 3×85,000 standard cubic meters per hour (oxygen) air separation plant, which is under general contracting by Hualu Company, is currently the largest electric-driven air separation plant complex under construction in China. It is the first project in the coal chemical industry to utilize 40-megawatt super-large domestic electric motors, serving as a model for plants of this scale in similar projects as well as for the use of domestic electric motors in the large-scale chemical industry. In addition, this device was involved in a research project conducted by Sinochem Group on cryogenic energy storage-based air separation process systems; it pioneered the use of liquid nitrogen and liquid oxygen backflow techniques, and employed an LCI variable-frequency starting scheme to reduce the impact of starting current on the power grid. Once the facility is built and put into operation, it will have a positive impact on the utilization of wind and solar energy, as well as on energy savings and reduction of consumption in air separation units. Since the commencement of pile foundation work in August 2024, Hualu Company’s project team has taken design as the guiding principle, procurement as a supporting element, and construction as the core focus, driving efficient coordination and organized efforts to overcome challenges; as a result, a series of achievements have been made in terms of safety, quality, and schedule. During the construction process, strong emphasis was placed on technological innovation to overcome technical challenges. The compressor plant adopted a prefabricated frame column system, combined with modular construction methods, which significantly reduced safety risks and improved work efficiency. As a result, the construction period was shortened by 45 days, setting a new record for the construction of similar facilities. On May 15, 2025, the cabs of the 3 air separation units were topped out 108 days ahead of the schedule specified in the contract, while the installation of the compressors was completed 49 days earlier than planned. The project has achieved a total of over 1.5 million safe working hours, with a first-pass welding success rate of 97.93%; safety, quality, and schedule are all under full control. Gao Yunqiang, deputy commander of the Phase II command center for China Coal Shaanxi Coal Chemical Industry, spoke highly of Hualu Company’s professional standards, determination in overcoming challenges, and outstanding achievements in the project construction. He said that the China Coal Yulin Coal Deep Processing Base project is a major initiative aimed at promoting energy transformation and industrial upgrading. As the \"power source\" of the entire plant, the air separation unit’s high-quality completion is of decisive importance for ensuring the smooth operation of the downstream facilities and achieving the overall benefits of the project. Wang Kai, deputy general manager of Hualu Company, said in his speech that the mechanical completion of this air separation unit is a vivid demonstration of Hualu Company’s commitment to fulfilling the corporate philosophy of \"exceeding customer expectations and creating best practices\". The project department made full use of the integrated advantages of EPC general contracting, and through technological innovation and lean management, achieved \"zero accidents and zero pollution\" in terms of safety, quality, and environmental protection. Key project milestones were accurately controlled, resulting in a significant improvement in construction efficiency. Hualu Company will go all out to advance the subsequent work of the project, ensuring high-quality conduct of joint commissioning, performance testing, and stable operation, so as to deliver a top-quality project to the owner.