【Ten Years of Rapid Development in Chemical Equipment】1324–2023: Manufacturing of high-pressure equipment for China’s largest urea production plants, with a capacity of 1.2 million tons per year

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Recently, Jinzhong Company, a subsidiary of Dalian Heavy Industry Equipment Group, completed the manufacturing of a set of high-pressure urea production equipment in China with the highest annual capacity of 1.2 million tons for a project aimed at the clean and efficient comprehensive utilization of coal on a graded and differentiated basis. This equipment includes a urea synthesis tower, a full-condensation reactor, a stripping tower, and a high-pressure washer; the total weight of this equipment is over 1,500 tons, and it was delivered successfully. It is understood that this urea production facility was developed through close cooperation between Jinzhong Company and the China Fifth Ring Research Institute. It utilizes patented technologies for efficient urea synthesis with low energy consumption, and features a rational process layout, stable operation of the equipment, low steam consumption, a low overall height, and reduced investment costs. Its production capacity and technology are among the best in China, reaching the level of similar international products. “The successful development of this project marks Jinzhong Company’s ability to increase the annual production capacity of a single urea manufacturing unit from 1 million tons to 1.2 million tons. It has also enabled the company to gain experience in manufacturing ultra-large-scale equipment, which is of great strategic significance for maintaining a 95% market share in the field of high-pressure urea equipment – thereby preserving the company’s leading position in this industry and enhancing its core competitive strengths. ”Yang Zhanbo, deputy general manager of Jinzhong Company, explained. In 2023, Jinzhong Company focused on customer needs; from the outset of each project, it assigned its most skilled personnel in design and manufacturing technology to optimize the manufacturing processes based on the characteristics of the equipment structure. The company tackled five key technical challenges: the lining and internal cylinder heat-shrinking process for large-scale equipment, the overall wrapping process for layered components, non-destructive testing methods for thick-walled welded joints, the processing of pipe ends on stripping towers, and the control of the verticality of tube bundles in stripping towers. It also carefully planned the manufacturing process, coordinated manufacturing activities both within the factory and at the construction site, and strictly controlled the quality of each stage of production. Among them, the fully condensed reactor, weighing 600 tons, required on-site welding to complete its assembly. The project team worked together closely, overcoming challenges such as limited space and a humid environment at the site, and carried out the welding work to a high standard. The project passed the acceptance inspection on the first attempt, earning high praise from the client. It is reported that Jinzhong Company is a veteran and key enterprise in China’s pressure vessel manufacturing industry. It has developed China’s first set of large-scale urea high-pressure equipment, was the first to achieve domestic production of low-temperature ethylene equipment, and other critical industrial systems; it has also created over 100 innovations that were the first of their kind in China” ； More than 20 ** and industry standards have been formulated or revised, making significant contributions to over a dozen key projects such as the West-East Gas Pipeline and Shenhua’s coal-to-oil project.