Abstract: In view of the high humidity and salinity sea air conditions faced by the two GE PGT25+SAC aeroderivative high-efficiency turbines in Bohai Central Platform,the inlet filter has poor filtering effect,which leads to the failure of turbine unit efficiency to achieve the set effect,and increases the filter replacement frequency and maintenance times. This paper discusses how to change the type and rebuild the structure of the inlet filters of two turbines,so as to improve the service efficiency of the turbine unit filters. This method has been applied to large units in many facilities in Bohai Oilfield,and achieved good application practice,achieving good results of improving the efficiency of turbine units and reducing the use cost of the overall filter.

Key words: turbine, inlet filter, efficiency improvement, cost reduction