In order to ensure the safety and stability of production during the Spring Festival, Anqing Petrochemical Refinery II carried out a series of maintenance and optimization tasks prior to the holiday. Specifically, they performed a unloader replacement on the I-set hydrogen saturation reactor 001, removed the old catalyst, and installed new material. This operation was executed smoothly, ensuring a seamless transition in the production process and maintaining high-quality product output.
Previously, the increasing pressure difference in the 001 differential pressure of the I-saturated hydrogenation reactor had begun to affect the efficiency of the hydrogenation reaction. To maintain normal operations and product quality, it became necessary to perform a crowning operation on the reverse 001. The application of the I-hydrogen saturation reactor effectively protected the I-set hydrogenation reactor 101, preventing excessive pressure buildup from coked catalysts and avoiding potential shutdowns that could disrupt production. Additionally, the furnace filter could be handled directly without stopping the unit, improving operational efficiency.
During the Spring Festival, the hydrogenation unit at the second refinery conducted pre-holiday equipment and HSE inspections, implementing various measures to address challenges such as fluctuations in the gas pipeline network. All teams ensured that equipment remained in good working condition, with pumps properly maintained and ready for use. Large-scale units and special equipment were carefully managed, and alarm systems for combustible gases and fires were checked and confirmed to be functional. Any identified risks were promptly addressed, and safety protocols were strictly followed to prevent any disruptions in production.
To prepare for the upcoming cold weather, anti-freezing, anti-coagulation, and anti-slip measures were implemented on-site. Operators closely monitored liquid levels, boundaries, and DCS data to avoid instrument errors. Key equipment such as the III hydrogenation cycle machine K-302 and raw material pumps were closely watched, with attention paid to temperature, steam seal, and liquid levels. Technicians were also required to keep their phones available at all times to respond quickly to any issues that might arise.
Due to the shutdown of a coking unit, gas supply was reduced, and factors such as increased liquid content and pressure fluctuations affected the temperature control of the I-set hydrogenation system. To prevent negative impacts on product quality and equipment integrity, operators closely monitored the DCS interface, manually adjusted key parameters, and coordinated on-site and indoor operations to maintain stable inlet temperatures and ensure smooth production.
Additionally, a newly installed television monitoring system in the two hydrogenation operation rooms has significantly enhanced site safety. With 13 electronic cameras strategically placed, the system provides full-process monitoring of towers, pumps, and other critical areas, enabling quick detection and response to any unexpected or abnormal situations. This advanced monitoring system acts as a strong protective layer, ensuring safe and stable operations throughout the holiday season.
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