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Domestic largest air separation unit completed and put into operation at Anqing Petrochemical
In recent days, a major breakthrough has been achieved in China's industrial sector as the country's first independently designed and built large-scale air separation unit was successfully commissioned at Anqing Petrochemical. The facility now produces high-purity oxygen and nitrogen, marking a significant milestone in China's domestic energy and chemical industry. This achievement signals the end of China's long reliance on imported large-scale air separation technology, and confirms that the nation is now among the global leaders in this critical manufacturing field.
Anqing Petrochemical has taken on the responsibility of driving national industrial development by implementing the first domestically developed hollow splitting device. The air separation unit was a collaborative effort between Hangzhou Oxygen Group, Shenyang Blower Factory, and Hangzhou Steam Turbine Co., Ltd., with Ningbo Engineering Company handling construction and installation. Throughout the project, Sinopec headquarters played an active role, organizing multiple localization conferences to address key issues related to compressors, steam turbines, and overall system integration. The project team worked closely with design and manufacturing partners to ensure smooth execution and successful implementation of the plan.
This air separation unit features the largest air compressor in China, offering improved operational efficiency and significant energy savings compared to traditional double-outlet steam turbines. However, the advanced technology also brought greater complexity and technical challenges. To mitigate risks, the engineering and R&D teams collaborated since March 2004, drawing on the experience of imported systems and continuously refining their designs. After more than two years of dedicated effort, the largest air separation plant in China was finally completed and put into operation at Anqing Petrochemical.
The unit is designed to produce 48,200 cubic meters per hour of oxygen, providing essential raw materials for a synthetic ammonia plant with an annual capacity of 330,000 tons and a urea fertilizer plant capable of producing 580,000 tons annually. This project not only enhances China’s self-reliance in critical industrial infrastructure but also supports the broader goal of transforming energy resources and promoting sustainable development.