Thread Content
The 68.5-meter-high cryogenic tank structure, a key component of the 60,000 Nm3/h air separation unit for Hubei Xinyi Chemical’s ammonia and alcohol production project, was successfully completed on April 23, 2023. Author/Source: Gasification World; Date: 2023-04-25; Views: 20. On that day, as the hook of a 650-ton crawler crane slowly descended, the construction of this critical structure was finished – it was built by Zhejiang Zhongtian Zhihui Installation Engineering Co., Ltd. as part of Hubei Xinyi Chemical Co., Ltd.’s project to upgrade its clean coal pressurized gasification and combined production facilities (referred to as the “ammonia and alcohol project”). It is reported that this air separation unit was designed and supplied by Hangyang Group, a leading domestic manufacturer of air separation systems. Equipped with Mannesmann turbines, it employs a dual internal compression process that utilizes low-pressure molecular sieve adsorption for purification, turboexpansion for cooling, structured packing, and full distillation to produce high-purity oxygen, nitrogen, and argon, as well as crude products of rare gases such as krypton and xenon. The capping of the air separation cold box marks a new chapter in the construction of the air separation plant, as it officially enters the critical phase of equipment installation and piping. Upon completion, the project will further enhance the industry’s competitiveness, providing strong new momentum for the continuous deepening of corporate reform and development. The Xinyi ammonia synthesis project utilizes multi-nozzle opposed coal-water slurry gasification, gas purification methods such as controlled heat transfer shift reaction, low-temperature methanol washing, and liquid nitrogen washing, Casale low-pressure ammonia synthesis, and Linde methanol synthesis. The production capacity is 460,000 tons of synthetic ammonia and 90,000 tons of methanol per year, for a total ammonia and methanol capacity of 550,000 tons. Project Overview: It is reported that the Clean Coal Pressurized Gasification Combined Production Technology Upgrade and Relocation Project of Hubei Xinyi Chemical Co., Ltd. (referred to as the Ammonia and Methanol Project) is the key project for the complete relocation of the Yihua Group’s Xiaoting Industrial Park to the Tianjiahe area of Yaojiagang Chemical Park. With a total investment of 2.9 billion yuan, the project’s production capacity will be 460,000 tons of synthetic ammonia and 90,000 tons of methanol per year, resulting in an overall ammonia and methanol production capacity of 550,000 tons per year. It mainly supplies liquid ammonia and methanol as raw materials to downstream phosphate fertilizer plants and polyol plants. The project adopts world-leading multi-nozzle opposed water-coal slurry pressurized gasification technology, isothermal shift technology, integrated low-temperature methanol washing desulfurization and decarbonization technology, and Swiss Cassali low-pressure synthesis technology, with imported equipment used for the core units. Hubei Yihua Chemical Co., Ltd. was established in 1977; it is a state-controlled listed company and the core subsidiary of Hubei Yihua Group, one of the top ten representative enterprises in China’s petrochemical industry. The company is mainly engaged in the production and sales of fertilizers and chemical products. The company is an important fertilizer manufacturer in the country, and it is the third manufacturer of large-grain urea in the nation. The company possesses a production facility for sodium azide with an annual capacity of 100,000 tons ； Three sets of ammonia synthesis production units ； Three urea production units, with a total designed capacity of 600,000 tons per year ； Two sets of ion-exchange membrane caustic soda production units, with a total designed capacity of 100,000 tons per year. In 2019, Hubei Xinyi Chemical Co., Ltd., a subsidiary of Yihua Group, was responsible for carrying out the construction project to upgrade the ammonia synthesis plants using traditional processes.