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Successful no-load test of the ammonia compressor in the centrifugal refrigeration compression unit by China Coal Hubei Energy Chemicals – Author/Source: Coal Chemical Industry 114 Forum, Date: 2020-12-14, Clicks: 4. On December 11, thanks to the joint efforts of the project team, the general contractor, and the construction company, the no-load test of the ammonia compressor in the centrifugal refrigeration compression unit was successful. This compressor is the core component of refrigeration systems; it is manufactured by Shenyang Blower Factory. It is driven by an HNK32/37 condensing turbine produced by Hangzhou Steam Turbine Co., Ltd. Its operating speed ranges from 4840 to 7260 rpm, while the shutdown speed is 7841 rpm. The ammonia compressor is the \"heart\" of a refrigeration plant; its main function is to compress gaseous ammonia, which is then converted into liquid ammonia after processing in the refrigeration plant, thereby providing cooling capacity for newly built low-temperature methanol washing units. This test run will directly determine the success of the commissioning trial for the second-phase project. At 5:30, the test crew began to set up the auxiliary systems, completing a series of preparatory tasks including warming the pipes with bleed air, starting the shaft rotation, activating the shaft seal steam, and establishing vacuum. At 10:20, the turbine officially began to spin up, and by 12:25, the unit was running stably at a speed of 5,593 revolutions per minute. The test personnel monitored the unit’s parameters on-site and compared them with those from the control room; both the shaft vibration levels and the bearing temperatures met the design specifications. The success of this no-load test marks the entry into the final stage of construction for the refrigeration unit of the methanol project, laying a solid foundation for subsequent commissioning tests of this unit. The second-phase construction project of China Coal Energetic Chemicals Company, aimed at upgrading the production capacity to 1 million tons per year of methanol through syngas production, is located in the Tuk Industrial Park in Ordos, Inner Mongolia. This project utilizes Zemach BGL fixed-bed slag gasification technology, purification technologies (low-temperature methanol washing + deep cryogenic methane separation), as well as advanced methanol synthesis techniques that feature low consumption and low energy usage, in order to build a facility capable of producing 1 million tons per year of MTO-grade methanol. The project commenced construction on September 21, 2018. The Zhongmei Enechemical project, with an annual production capacity of 2 million tons of ammonia and 3.5 million tons of urea, was constructed in two phases. The first phase, which has an annual production capacity of 1 million tons of ammonia and 1.75 million tons of urea, includes two 40,000 Nm3/h air separation units; these units were completed and put into operation in 2013. Meanwhile, some of the public facilities required for the second phase as well as all the office and living facilities have been built. Based on the current market conditions and operational status, Phase II of the project plans to shift from producing synthetic ammonia and urea to manufacturing 1 million tons of methanol, thereby supplying MTO-grade methanol raw materials to the olefin plants of China Coal Mengda Company.