China Energy Yulin Chemical's High-Pressure Polyethylene Unit Sets New Record for Longest Continuous Operation Among Domestic Units

The Yulin Chemical High-Pressure Polyethylene Plant of Guoneng uses ethylene as the main raw material, along with propylene and propanal as adjusting agents, and can produce 300,000 tons of LDPE resin annually. The products are widely used in general films, agricultural films, ground films, cable insulation sheaths, heavy-duty packaging films, shrink films, food packaging, composite films, and other fields.

Due to the use of a high-pressure tubular process, the reaction pressure reaches up to 260 megapascals, and the process conditions are stringent, requiring high equipment stability and operational precision. Guoneng Yulin Chemical has established a long-cycle operational task force of party members to conduct systematic technical breakthroughs around the operational bottlenecks of the device. They have innovatively proposed the "increased section heat exchanger condensation" operation method to optimize the compressor operating conditions. At the same time, by optimizing the peroxide injection stroke, implementing a high-pressure strain gauge anti-blocking modification for the compressor, and strengthening dynamic monitoring, operational trend analysis, and maintenance of key units and important equipment, the device's anti-interference capability and operational stability have been significantly improved, achieving safe and reliable operation of the unit.