Method for Rapid Leak Detection of Cooler in Air Cooling System of Gas Turbine

An air cooling system and cooler technology, which is applied in the testing of machine/structural components, instruments, fluid tightness testing, etc. time saving effect

Active Publication Date: 2020-12-11
UNIV OF SCI & TECH LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Leakage of TCA air cooler can lead to decrease of vacuum degree of condenser and increase of dissolved oxygen in condensed water at condenser outlet, but this cannot be regarded as a necessary condition for judging leakage of TCA air cooler
Because the leakage of the condenser system will also have such consequences, and the leak detection work of the condenser vacuum system is more cumbersome and difficult

Method used

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  • Method for Rapid Leak Detection of Cooler in Air Cooling System of Gas Turbine
  • Method for Rapid Leak Detection of Cooler in Air Cooling System of Gas Turbine

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Embodiment

[0036] Such as figure 1 As shown, this method can quickly analyze the causes of gas turbine TCA cooler leakage and condenser vacuum reduction in the M701S(F) gas-steam combined cycle power generation system through the measurement and analysis of the amount of dissolved oxygen in condensed water and the vacuum degree of the condenser. judge.

[0037] In this embodiment, when the unit is running stably under a certain load, the vacuum degree of the condenser decreases. At this time, the standby vacuum pump is started according to the normal operation, so that the two vacuum pumps can run at the same time. The two vacuum pumps can also be switched to run and measure ΔDD value and ΔVD 1 If the vacuum degree of the condenser and the amount of dissolved oxygen in the condensed water are improved after taking the above measures, it can be judged that the vacuum pump system is operating normally.

[0038] If the vacuum degree of the condenser and the dissolved oxygen content of the...

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Abstract

The invention belongs to the technical field of gas-steam combined cycle power generation system monitoring, and in particular relates to a method for quickly checking for leaks in a gas turbine air cooling system cooler, which is characterized in that it includes the following steps: (1) normal operation of a vacuum pump, respectively obtaining DD 1 、DT 1 and VD 1 ; (2) two vacuum pumps are running, respectively get DD 2 、DT 2 and VD 2 ; (3) unit load, get DD respectively 3 、DT 3 and VD 3 ; (4) Quickly judge the leakage position from the condenser to the TCA cooler. The invention can monitor and maintain the safe and stable operation of the gas-steam combined cycle power generation system. When the vacuum of the condenser decreases and the dissolved oxygen of the condensed water increases, it can quickly judge whether there is leakage of the heat exchange tube at the TCA cooler. Problems, avoid complex procedures for leak detection, save time, and ensure safe and stable operation.

Description

technical field [0001] The invention belongs to the technical field of gas-steam combined cycle power generation system monitoring, and in particular relates to a method for quickly checking for leaks in a cooler of a gas turbine air cooling system. Background technique [0002] The air cooling system of the gas turbine, especially the cooling of the turbine rotor of the Mitsubishi M701S(F) gas turbine usually adopts the cooling air system (TCA system). The cooling air is extracted from the outlet of the air compressor, and enters the gas turbine rotor after being cooled by the water-cooled cooler. TCA cooling water is taken from the waste heat boiler feed water system, and the condensed water from the condenser is used to reduce the temperature of the cooling air. The condensed water after absorbing heat is sent to the waste heat boiler through a low-pressure feed water pump to improve the thermal efficiency of the combined cycle. In gas turbines, the leakage of TCA cooler...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/02
CPCG01M3/025
Inventor 霍兆义汪新钟在锡王少敏
Owner UNIV OF SCI & TECH LIAONING
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