【Major Chemical Equipment in China】050 – China’s first 1.8 million tons/year methanol synthesis gas compression unit
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The past decade has been a period of rapid development in China’s chemical industry, marked by the emergence of many new processes, products, and equipment. There has also been significant progress in China’s chemical processing equipment, which has contributed to the swift advancement of the petrochemical sector. Here, we have compiled some of the achievements and breakthroughs made by Chinese equipment manufacturers in terms of larger-scale production and increased use of domestic equipment. We invite everyone to share their insights and engage in discussions, to cheer for Made in China and to support the development of chemical processing equipment! *********************************** On October 19, 2018, China’s first set of methanol synthesis gas compression units with an annual capacity of 1.8 million tons passed the expert evaluation conducted by Sinopec Corporation after operating continuously and stably for over 300 days. Experts believe that the unit operates smoothly, with all performance indicators meeting the design requirements; its overall technical level is at the international advanced stage, and its energy consumption metrics are at the international leading level. This unit was jointly developed by Shenyang Turbine Group Co., Ltd., Sinopec Ningbo Engineering Co., Ltd., Zhongtian Hechuang Energy Co., Ltd., Hangzhou Steam Turbine Co., Ltd., and others; it is currently the largest methanol synthesis gas compression unit in operation in China. During the development process, a series of challenges were overcome, including the development of new aerodynamic model levels and the optimization of flow structures. First, a new aerodynamic model stage was developed, reducing the number of stages in the synthesis section from 6 to 5, which improved the unit’s adaptability to various operating conditions and enhanced its operational efficiency. Second, the flow structure was optimized, resulting in a significant reduction in flow losses in the inlet and outlet volutes and an improvement in the polytropic efficiency of these volutes. Third, the layout and structure of the rotor were optimized, and a new counter-rotating flow sealing technology was employed, thereby significantly improving the stability of the rotor. To date, this unit has been granted 2 invention patents and 8 utility model patents. The successful application of this unit has filled the gap in China’s field of large-scale methanol synthesis gas compressors, enhancing the competitiveness of China’s petrochemical equipment.
At 13:30, the auxiliary systems were started up; preparations such as warming the pipes with bleed air, initiating shaft rotation, supplying steam for shaft seals, and creating a vacuum were completed； At 15:34, the turbine officially began to spin up, entering the low-speed warm-up phase ； At 17:05, the warm-up was completed successfully, and the speed-up phase began, continuing until the minimum controlled speed of 5235 revolutions per minute was reached ； After the minimum controlled speed had stabilized for one hour, the speed was increased again, reaching the maximum controlled speed of 7,853 revolutions per minute at 18:53. During this period, two tripping tests and one overspeed protection test were also carried out. The commissioning personnel monitored the unit’s data on-site and compared it with the data from the control room; all results met the design requirements. At present, the commissioning of the natural gas conversion and synthesis plant has entered its final phase, with all staff at the center dedicating themselves fully to this task in order to help the plant become operational as soon as possible and to strive toward the company’s \"6.30\" goal
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In recent years, Shenyu and Shenyang Aircraft have gained a lot of fame
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