Abstract:

As an important line of defense for the air taken into gas turbines, air filtration system is essential for the safe and economic operation of gasfired power generation enterprises. Huadian Qishuyan Power Generation Company Limited took an technical modification on prefilters of a air intake filtration system in a M701F4 gas turbine. By increasing the area of prefilters and updating the filtration class from G4 to M6, the dropping rate of the gas turbine compressor efficiency decreased 1.0~1.5 percentage points per 1000 operating hours, the combined cycle heat consumption rate decreased by 0.24kJ/(kW·h) per 500 operating hours, and the service life of fine filters increased from 2400~2500h to nearly 6000h. At the same time, the highest pressure differential of fine filters in rainy, foggy and other extreme weather dropped by about 40~50Pa. The modification results show that upgrading the filtration class and increase the filtration area can significantly improve the safety and economy of the unit.

Key words:

font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">gas turbine, filtration system, filtration stage, heat rate, unit economy, air filtration systemfont-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">