| 摘要 |
PROBLEM TO BE SOLVED: To provide a long life suction filter unit for a gas turbine which is an efficient suction filter unit not to deteriorate power generation output and enables filter replacement at regular inspection of the gas turbine which is mandated to be performed once a year. SOLUTION: In the suction filter unit 5 for the gas turbine provided with a dust filter of a plurality of stages, the dust filter is composed of three stage arrangement of a panel type demister 2, a wind up belt type or windsock type pre-filter 3 and a high performance suction filter 4 for the gas turbine from an upstream side in an air flow direction, the high performance suction filter for the gas turbine is composed by closely piling low efficiency filtering material and high efficiency filtering material from the upstream side in the air flow direction, filter material area of each filtering material is set in 25-35 m<SP>2</SP>/unit, filtering material of 10-70% filtering efficiency in relation to 0.3μm diameter particles is arranged in a layer of the upstream side in the air flow direction, filtering material of 99.97% filtering efficiency in relation to 0.3μm diameter particles is arranged in a layer of a downstream side in the air flow direction, and pressure drop at a time of flow rate 50 m<SP>3</SP>/minute is maintained in 15-45 mmAq. COPYRIGHT: (C)2007,JPO&INPIT
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