Inlet air filter device of gas turbine

Abstract

The invention relates to an inlet air filter device of a gas turbine. The inlet air filter device comprises a filter, an anti-rain hood, a high-precision filter element, a back-blowing nozzle, a compressed air pipe, an electromagnetic valve, inspection and repair platforms, an air channel and a silencer, wherein the anti-rain hood is arranged at the inlet of the filter; the high-precision filter element is arranged in the filter; the back-blowing nozzle is arranged in the filter outlet direction of the high-precision filter element and is connected with the compressed air pipe; the electromagnetic valve is arranged on the compressed air pipe; the inspection and repair platforms are arranged at two sides of the high-precision filter element in the filter; the outlet of the filter is connected with the silencer through the air channel; the high-precision filter element is in a double-layer structure, the first layer is an E class filtering layer and the second layer is an anti-moisture filtering layer. The inlet air filter device of the gas turbine has the advantages of efficient filtering, long service life and low operation risk, and has a good promotional value.

Description

Technical field: [0001] The invention belongs to an air filtering device, in particular to a gas turbine inlet air filtering device. Background technique: [0002] The main function of the gas turbine inlet air filter device is to filter out dust particles and corrosive harmful gases and solids in the air, so that clean air can enter the gas turbine, and prevent dust particles, water vapor gel and other substances in the air from entering the air passage, causing the air intake of the gas turbine to decrease. Reduce, thereby reducing the output power and thermal efficiency of the gas turbine generator set, preventing the compressor blades from being dirty and causing surge, and increasing the power consumption of the unit operation. [0003] Existing gas turbine inlet air filtration devices generally use multi-stage filtration to achieve the purpose of filtering out particles, sub-particles, salt, water and hydrocarbons in the air, and ensure the cleanliness of the air enter...

AI Technical Summary

Problems solved by technology

However, the existing multi-stage filtration mainly has the following disadvantages: (1) The traditional filter device generally adopts three-stage filtration, that is, the front panel and frame type demister filters out water, the middle medium-efficiency filter filters out large particles of dust, and the rear installation High-precision V-shaped HEAP filter to meet the requirements of filtration efficiency and filtration accuracy

Due to the use of three-stage filtration, the equipment body is relatively large, occupying a large area, and inconvenient for maintenance; the three-stage filtration makes the initial resistance generally reach more than 450Pa after superposition, and cannot effectively filter out salt, which will affect downstream equipment

(2) The filtering accuracy of the HEAP filter used in the existing three-stage filtration cannot meet the E12 standard in EN1822-2009, and the filtering accuracy is low

(3) Most of the original three-stage filter devices are not equipped with reverse blowing nozzles, which will easily cause blockage of the filter cartridge after long-term use, reducing the service life of the filter cartridge

(4) Most of the maintenance platforms of the existing filtering devices are external, which increases the risk of operation when workers do maintenance.

[0005] The existing gas intake filter is mainly a cartridge type air filter, which can meet certain filtering requirements as a protective device, but has certain defects in one aspect, and cannot simultaneously meet the requirements of "high precision", " High filtration efficiency", "high stability", "effectively resist harsh natural environment", "online replacement of filter elements", "high cost performance", "reliable" and other elements

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