Yunnan Yunwei Group Zhanhua Branch No. 3 ammonia synthesis tower has completed the warming reduction phase, marking the successful conclusion of the company's single-system equipment maintenance in the first quarter of this year. This achievement has fulfilled the "parking, maintenance, and operation" three safety goals, demonstrating the company’s commitment to both efficiency and safety.
In response to power shortages during the first quarter, the company initiated a comprehensive overhaul of its single-system equipment, which involved a total of 190 tasks. These included 146 mechanical items, 26 instrument-related tasks, 14 electrical components, and 4 quality inspection items, along with 85 additional pressure vessel inspections. The main scope of the overhaul encompassed the purification of the No. 3 medium-temperature shift furnace, catalyst replacement, the replacement of the No. 3 ammonia synthesis tower, and the removal of the urea A system’s No. 1 and No. 2 units, as well as the inspection of pressure vessels.
The maintenance project was particularly challenging due to the simultaneous need for production and maintenance activities, making safety a top priority. To ensure a smooth and secure process, the company implemented strict project approvals and conducted thorough on-site inspections throughout the entire maintenance period. This proactive approach not only ensured the successful completion of the work but also reinforced the company’s reputation for operational excellence and safety management.
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