The carbon dioxide compressor pressurizes the CO2 gas generated by the purification unit and transports it to the gasification unit as a carrier for coal powder transportation.The compressor adopts a 5-stage compression system.During the start-up process of the device,two tests of the compressor showed high temperature of the main thrust tile of the 5-stage rotor,carbon deposition and wear on the tile,and the unit could not operate normally under the design conditions.After analyzing the phenomena,operating trends,design calculations,and lubricating oil samples during the disassembly process,it was believed that the main reasons for the high temperature and wear of the thrust tile are insufficient oil supply in the unit's lubricating oil design,small thrust clearance,and blocked oil channels.
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