The air separation unit of the Tarim Phase II ethylene project produces qualified nitrogen

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On January 14, Unit 2 of the air separation unit in the Tarim 1.2 million tons/year Phase II ethylene project, constructed by China Kunlun Engineering Dalian Branch, successfully produced nitrogen of qualified purity, with an O2 content of ≤3 ppm, marking a significant breakthrough at a key stage of this facility. To ensure the project’s timely commissioning, the project team at the Dalian branch worked overtime for 24 consecutive hours, successfully completing the filling of the pearlescent sand in container #2 and thus laying a solid foundation for the project’s operation. Millimeter-level precision creates “heart engineering”. As the \"gas supply center\" for the ethylene project, the air separation unit relies on its core equipment, namely the cryogenic tank, to carry out the distillation and separation of oxygen and nitrogen. Each of the 1# and 2# cold boxes is composed of 4 sets of jacks; the jack for the main tower cold box weighs 125 tons, that for the main heat exchanger cold box weighs 90 tons, that for the auxiliary tower cold box weighs 65 tons, and that for the oxygen tower cold box weighs 18 tons. These jacks are large in size and have a high center of gravity; their installation requires extremely high precision, with horizontal deviations having to be kept within the millimeter range. Any minor error can affect the operational efficiency of the entire system. To ensure the accurate positioning of the cold box, the project team initiated comprehensive preparatory work one month in advance. From the repeated reviews of the lifting plan to the reinforcement of the equipment foundations, from the careful selection of lifting gear to the continuous monitoring of weather conditions, every aspect has been carefully considered and optimized multiple times to ensure absolute reliability. During the lifting process, a \"double-crane lifting\" technique is employed; the 400-ton crawler crane takes on the main lifting load to ensure that the container is raised vertically and smoothly ； The auxiliary crane uses a 160-ton hydraulic truck crane; by working in precise coordination with the main crane, it adjusts the posture of the equipment dynamically, thereby effectively counteracting disturbances such as wind forces and uneven gravity. 24 hours of continuous effort demonstrate the commitment between family and enterprise. During the pearlescent sand filling phase, all members of the project team demonstrated the petroleum spirit of \"daring to take on tough challenges and being capable of winning battles\" by working overtime for 24 consecutive hours. “Pearl sand filling is a critical process with high technical requirements and intense workload, demanding strict control over the filling density and uniformity. ”As introduced by Wang Jingtao, the project manager of the Dalian branch. The construction workers overcame unfavorable factors such as winter construction and dusty weather, and strictly followed the operating procedures by using wooden hammers to strike the outer shell of the cold box repeatedly, ensuring that the pearlescent sand was filled tightly and thus providing a reliable guarantee for the cold-insulating performance of the cold box. The Dalian branch has always focused on fostering a corporate culture centered on a sense of belonging to the family and the company, promoting the cultural values of integrity, innovation, service, and mutual success. In this critical battle, the Party member commando team and the youth commando team of the project department took the lead, planting the Party flag and the commando team flags at the construction site, thereby playing a exemplary role and demonstrating the team spirit of the Kunlun Project workers – working together as one family with one heart and one goal.