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Flame detection system and method of gas turbine

A gas turbine and flame detection technology, which is applied in the direction of combustion methods, combustion chambers, combustion equipment, etc., can solve the problems of measurement time delay, high hardware cost and maintenance cost, and achieve the effects of small time delay, long maintenance period and convenient maintenance

Active Publication Date: 2015-06-03
BEIJING HUAQING GAS TURBINE & INTEGRATED GASIFICATION COMBINED CYCLE ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the hardware cost and maintenance cost in the prior art are relatively high, and the problem of measurement time delay

Method used

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  • Flame detection system and method of gas turbine
  • Flame detection system and method of gas turbine
  • Flame detection system and method of gas turbine

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Experimental program
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Effect test

Embodiment 1

[0033] figure 1 It is a schematic flow chart of a gas turbine flame detection method according to an embodiment of the present invention, as figure 1 As shown, a gas turbine flame detection method proposed in an embodiment of the present invention includes the following steps:

[0034] S11. Measuring the total pressure in the fuel pressure cylinder of the gas turbine to be tested and the static pressure at the turbine nozzle throat of the gas turbine to be tested;

[0035] S12. Calculate the pressure difference between the total pressure in the fuel pressure cylinder and the static pressure at the throat of the turbine;

[0036] S13. Calculate the combustion chamber gas flow rate of the gas turbine to be tested according to the pressure difference between the total pressure in the fuel pressure cylinder and the static pressure at the throat of the turbine;

[0037] S14. Real-time monitoring of the fluctuation value of the combustion chamber gas flow rate, and judging whether...

Embodiment 2

[0042] figure 2 It is a schematic flow chart of a gas turbine flame detection method according to another embodiment of the present invention; figure 2 As shown, a gas turbine flame detection method proposed in an embodiment of the present invention includes the following steps:

[0043] S21. Measuring the total pressure in the fuel pressure cylinder of the gas turbine to be tested and the static pressure of the turbine cooling pipeline of the gas turbine to be tested;

[0044] S22. Calculate the pressure difference between the total pressure in the fuel pressure cylinder and the static pressure of the turbine cooling pipeline;

[0045] S23. Calculate the combustion chamber gas flow rate of the gas turbine to be tested according to the pressure difference between the total pressure in the fuel pressure cylinder and the static pressure of the turbine cooling pipeline;

[0046] S24. Monitor the fluctuation value of the gas flow rate in the combustion chamber in real time, an...

Embodiment 3

[0051] The embodiment of the present invention also proposes a gas turbine flame detection system, the gas turbine flame detection system includes: a calculation unit, a processing unit and a differential pressure gauge (P), such as image 3 As shown, the first pressure pipe on one side of the differential pressure gauge (P) is connected to the fuel pressure cylinder of the gas turbine to be tested for measuring the total pressure in the fuel pressure cylinder, and the first pressure tube on the other side of the differential pressure gauge Two pressure-taking pipes are connected to the turbine nozzle throat of the gas turbine to be tested, for measuring the static pressure of the turbine throat;

[0052] The differential pressure gauge is used to measure the pressure difference between the total pressure in the fuel pressure cylinder and the static pressure at the throat of the turbine after the gas turbine to be tested is ignited;

[0053] A calculation unit, used to calcula...

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Abstract

The invention discloses a flame detection method and a flame detection system of a gas turbine. According to the method, the gas flow rate of a combustion chamber of a to-be-detected gas turbine is measured and calculated, fluctuating values of the gas flow rate of the combustion chamber are monitored in real time, whether flames are established is judged according to the fluctuating values, if the fluctuating value of flow rate reduction of the combustion chamber is less than a first preset threshold, a flameout state of the combustion chamber appears, and if the fluctuating value of flow rate increase of the combustion chamber is greater than a second preset threshold, the flames are established in the combustion chamber. The flame detection method and the flame detection system have the advantages of lower failure rate and misdiagnosis rate, short response time, convenience in maintenance and lower hardware and maintenance cost because only common sensors need to be used for measurement.

Description

technical field [0001] The invention relates to the technical field of gas turbine detection, in particular to a gas turbine flame detection system and method. Background technique [0002] The working principle of the gas turbine is that the compressor compresses the air. After the compressed air enters the combustion chamber, it reacts with the fuel injected into the combustion chamber, releases heat, and becomes a high-temperature compressed gas, and then the turbine rotates under the impetus of the high-temperature compressed gas to perform work. . The combustion of fuel in the combustor releases heat, which is a prerequisite for the operation of the gas turbine. If the flame cannot be established during ignition, it needs to be restarted or even shut down for inspection; if the flameout occurs during normal operation, unburned fuel may enter the turbine for combustion, causing deflagration. Therefore, from the perspective of normal operation and safe operation, it is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23M11/04
Inventor 徐伟科
Owner BEIJING HUAQING GAS TURBINE & INTEGRATED GASIFICATION COMBINED CYCLE ENG TECH