The 67-meter cold box, the core unit of Fuhai Chuang’s 70,000-unit centralized air separation and air compression project, has been successfully completed

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On October 31, 2025, China Air Separation’s official WeChat account announced that the EPC turnkey project for a 70,000 cubic meter centralized air separation and air compression unit undertaken by the company in Fujian Fuhai Chuang has reached an important construction milestone: the 67-meter-high \"cold box\" of the core unit was successfully completed, marking a partial success for the project and paving the way for the next phase, which involves equipment installation. The cryogenic tank is the core of an air separation unit; it can be regarded as a super „air sieve“ that operates at extremely low temperatures. It draws in ordinary air and, through advanced processes such as molecular sieve purification, removes moisture and impurities; after further deep cooling and distillation, it ultimately produces high-purity oxygen and nitrogen. This capping process represents a comprehensive inspection of the previous construction work, and it also lays the foundation for the subsequent installation of components with millimeter-level precision in a sealed and clean environment; it is a \"critical step\" in the project’s development. https://p3-sign.toutiaoimg.com/tos-cn-i-tjoges91tu/618f73a63f31819b3bb38cf171b0a473~tplv-tt-origin-web:gif.jpeg?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1765444221&x-signature=NReSHYgyP59d2p91270BDfrKLjk%3D The part marked in red refers to the Fuhai Chuangji Air Separation and Compressor Project. It is reported that the total investment in this project amounts to 750 million yuan, and its capacity includes a state-of-the-art air separation unit with a capacity of 70,000 Nm³/h, as well as a compressor station with a capacity of 90,000 Nm³/h. The project employs advanced processes such as molecular sieve purification and in-line oxygen-nitrogen compression, and will in the future produce industrial oxygen with a purity of at least 99.8% and high-purity nitrogen with a purity of at least 99.999%. As the first public auxiliary gas supply center in the Gulei Petrochemical Park, this project will ensure the supply of industrial gases for key facilities such as the Zhongsha Gulei ethylene plant and the Fuhai Chuang PX/PTA plant, thereby further promoting the development of the Gulei Petrochemical complex in the directions of higher sophistication, greener operations, and greater efficiency.