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China’s first set of electrically driven pyrolysis gas compressors successfully tested

2026-03-11View Original

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Recently, China’s first fully electric-driven pyrolysis compressor was successfully tested at the Dushanzi Petrochemical Tarim Phase II Ethylene Project (hereinafter referred to as “Phase II”), laying a foundation for the efficient progress of the project. As the \"heart equipment\" of the ethylene plant, these two units are the first fully electrically driven models of their kind in China; their stable operation is directly related to the production efficiency and safety of the entire plant. In this effort to complete the testing, the project team moved up the scheduled testing date from March 15 to March 1, shortening the timeline by half a month. After the successful trial run, parameters such as the shaft vibration, shaft displacement, bearing temperature, and inlet/outlet pressures of the unit remained stable, providing a reliable power supply for the subsequent purging of the equipment. During the commissioning period, representatives from the command team in charge of the commissioning of Phase II of the tower, the company’s team of technical experts, Production Department 1, the Mechanical, Electrical and Instrumentation Maintenance Center, supervisors, as well as equipment manufacturers, were all present throughout the process. The operators followed the plan meticulously when carrying out operations related to the lubrication system, dry gas seal system, frequency converters, etc., ensuring that the entire process proceeded smoothly and under control. Currently, the preparatory work for the official startup of the two pyrolysis gas compressors is progressing in an orderly manner, in preparation for the subsequent purging of the entire system. Meanwhile, the motor tests for the ethylene and propylene compression units have been completed, and stress-free piping and alignment work are currently in progress. Once the process, instrumentation, and electrical conditions are met, no-load mechanical testing will be carried out as planned. It is reported that, compared to traditional turbine-driven systems, fully electric drive units eliminate the need for lengthy warm-up periods; they require less space, present lower safety risks, and operate more efficiently, which aligns with the concept of building projects in a green and low-carbon manner. Relying on the local abundance of ethane, LPG, and light hydrocarbons, Phase II of the tower features a domestic equipment utilization rate of over 98%, as well as a utilization rate of proprietary technologies exceeding 99%. Upon completion of the project, the total ethylene production capacity of Dushanzi Petrochemical will increase to 3 million tons, placing it among the top in the country. The successful commissioning of this pyrolysis gas compression unit effectively verified the quality of equipment installation and instrumentation calibration, established a critical link for the transportation of process gases, and laid a solid foundation for subsequent comprehensive system testing.

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