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Progress of the Methanol Project at Enehua Chemical Industry Author/Source: Harmonious Enehua Chemical Industry Date: 2020-10-09 Clicks: 28 High-voltage frequency converters are one of the important components of high-voltage electrical equipment; their performance directly affects the efficiency of such equipment. By using frequency conversion for speed control, it is possible to set appropriate torque limits to prevent mechanical damage, thereby ensuring the continuity of production and the stability of the equipment. Recently, the Mechanical, Electrical and Instrumentation Center carried out commissioning work on high-voltage frequency converters. The quality of commissioning a high-voltage frequency converter directly determines the quality of subsequent maintenance and repair work on the converter. To ensure the successful commissioning of the frequency converters for the Phase II methanol project, the Mechanical, Electrical and Instrumentation Center carried out thorough planning for this process, established safety and technical measures, assigned clear roles to the testing personnel, assigned responsibilities to specific individuals, and appointed dedicated staff to strictly oversee the quality of the commissioning process, thereby ensuring that the tests were carried out safely, efficiently, and to a high standard. Through the joint efforts of everyone, the frequency converter commissioning task for the Phase II methanol project was successfully completed, creating favorable conditions for the smooth start-up of this project. The work of checking for leaks using natural cooling in the cold box of the second-phase air separation unit has been completed. Performing leak detection using bare cold methods inside a cryogenic tank is a task that is both difficult and highly risky. To ensure that this work is carried out safely and to a high standard, on the morning of October 3, 2020, the utility air separation project team held a safety and technical briefing session regarding leak detection with bare cold methods. During this session, the objectives of the work were defined, and relevant technical requirements were established for such detection processes. Relevant departments of the company, as well as the EPC contractor, the supervisor, and the installation company, attended the meeting. Work on detecting leaks using cold cooling methods began at 9:30, and by 17:00 in the afternoon, the leak detection process for the air separation unit using cold cooling methods was completed successfully; there were no leaks inside the cold box, and the cold tightening procedure was also carried out successfully. The successful completion of the leak detection using natural cooling in the cold box of the air separation unit has laid a foundation for its stable operation.