PETROCHINA(SH:601857) Zhong Guo Fa Zhan Wang·2025-07-23 07:28Group 1 - The Daqing Petrochemical Refinery's catalytic and gas fractionation unit, with a capacity of 1.4 million tons/year and 280,000 tons/year respectively, has resumed normal operations after a successful five-day startup following maintenance [3] - The maintenance addressed bottlenecks in production, enhancing crude oil utilization, increasing light oil output, and promoting green and low-carbon production [3] - The maintenance involved four key tasks, including inspections and repairs of the gas turbine, CO waste heat boiler, oil-water heat exchanger, and liquefied gas desulfurization tower [3][4] Group 2 - The maintenance was conducted under high-temperature conditions, with strict adherence to safety regulations and repair plans by participating units [4] - The equipment maintenance center mobilized skilled personnel to ensure timely completion of tasks, including the replacement of the gas turbine rotor and performance testing of the inlet butterfly valve [4] - A comprehensive repair plan was developed a month in advance, detailing construction materials, safety measures, and equipment configuration to ensure quality and depth of the maintenance work [4] Group 3 - The company plans to conduct a systematic summary of the maintenance to extract replicable practices and standardize construction processes and digital management experiences [4]