The polypropylene unit at Daqing Petrochemical has operated continuously and stably for 1,010 days, setting a new record for the longest operating period among similar units in China

Thread Content

As of May 12, the polypropylene unit at Daqing Petrochemical has been operating continuously and stably for 1,010 days, setting a new record for the longest uninterrupted operation period among similar units in China. This achievement signifies that the operation and maintenance management level of Daqing Petrochemical’s polyolefin units has reached a new height, providing valuable experience and practical references for the industry as a whole. This polypropylene plant operates in a single-line configuration, with the polymerization, flashing, and granulation units connected closely together, making long-term operation extremely difficult. Daqing Petrochemical integrated technical innovation with meticulous management, enabling the operation cycle of its facilities to rise from the historical best level to a new industry benchmark. During this operating cycle, the facility produced over 300,000 tons of polypropylene products in total. Technological innovation to overcome operational bottlenecks. Problems such as inaccurate pressure indication in the loop reactor and reduced heat transfer capacity of the reboiler had hindered the stable operation of the plant. The First Petrochemical Department of Daqing Petrochemical established a task force, innovatively adopted the \"double-pressure comprehensive assessment method\" and optimized interlock strategies to precisely control key process parameters, thereby significantly improving the stability of the plant’s operation. Science? ? Operations and maintenance: laying a solid foundation for stability. The company strictly controls the polymerization reaction temperature, keeping it within the 0.3-degree Celsius range. At the same time, a predictive maintenance approach is vigorously implemented, with online monitoring systems used for accurate assessments in order to improve the operating quality of key equipment such as extrusion granulators, thereby reducing the material consumption of the facility to a new historical low of 1,006 kilograms per ton. Leverage talent to build a strong team. Through methods such as mentor-apprentice pairing, practical drills, and incentive-based evaluations, the company comprehensively enhances the skill levels and emergency response capabilities of its employees. Department 1 of the Chemical Engineering Division has established a clear-cut emergency authorization mechanism, effectively enhancing the \"one-minute response capability\" and providing a solid defense for the stable operation of the facilities.