TDLAS technology-based gas turbine combustion temperature monitoring system
A gas turbine and combustion temperature technology, applied in the direction of physical/chemical change thermometers, thermometers, heat measurement, etc., can solve the problem that the gas turbine monitoring system cannot directly monitor the combustion temperature of the gas turbine combustion chamber, so as to solve the problem of time lag and avoid The effect of interference and error avoidance
Pending Publication Date: 2019-06-21
HUANENG POWER INT INC +1
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[0008] In order to solve the problem that the existing gas turbine monitoring system cannot directly monitor the combustion temperature of the gas turbine combustion chamber, and to realize the online monitoring of the combustion temperature of the gas turbine, the present invention provides a gas turbine combustion temperature monitoring system based on TDLAS technology. The system is based on TDLAS two-line temperature measurement The principle is to use two lasers to output laser lines of different wavelengths that can be absorbed by water vapor, and use a laser coupler to couple the two laser beams into a group of lasers, so that the coupled lasers pass through the flow field of the combustion chamber, and then use The photodetector converts the absorbed laser spectrum signal into an electrical signal, and through the temperature inversion module, measures and analyzes the intensity of the absorption line to obtain the combustion temperature
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[0042] Such as Figure 4 As shown, when the combustion chamber of the gas turbine is working, the laser emission module 1 and the laser data analysis and processing module 3 are arranged at the far end of the gas turbine, and the laser collimator 23 and the collimator cooling sleeve 24 are installed at the upper end of the outlet of the transition section of the combustion chamber of the gas turbine. The distance between the axis center of the laser collimator 23 and the exit plane of the transition section is 10mm, the photodetector 25 and the photodetector cooling sleeve 26 are installed at the lower end of the transition section exit of the combustion chamber of the gas turbine, and the photodetector 25 detects the center of the window The distance from the exit plane of the transition section is also 10mm, and the laser collimator 23 and the photodetector 25 are both perpendicular to the gas flow direction at the exit of the transition section of the combustion chamber of t...
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The invention discloses a TDLAS technology-based gas turbine combustion temperature monitoring system. The system comprises a laser emitting module, a laser transmission module, a laser data analysisand processing module and a temperature display module which are sequentially connected with one another. When the system is working, the laser emitting module generates required incident laser; the laser transmission module transmits the incident laser and laser which is absorbed by a gas turbine combustion chamber, and converts laser signals into electrical signals; the laser data analysis and processing module performs analysis, extracts valid electrical signals, and performs inversion calculation to obtain combustion temperature; and the temperature display module displays the temperatureof the flow field of the combustion chamber in real time. According to the TDLAS technology-based gas turbine combustion temperature monitoring system of the invention, an optical non-contact combustion temperature measurement method is adopted to measure the combustion temperature of a gas turbine. Compared with an existing combustion temperature measurement system for a gas turbine, the TDLAS technology-based gas turbine combustion temperature monitoring system of the invention has the advantages of wide measurement range, no interference exerted on the flow field, high measurement precisionand the like.
Description
technical field [0001] The invention belongs to the technical field of gas turbines, and in particular relates to a gas turbine combustion temperature monitoring system based on TDLAS technology. Background technique [0002] Combustion temperature is an important factor affecting the combustion efficiency and pollutant emissions of gas turbines. Accurate monitoring of combustion temperature will help to achieve precise control of the combustion process of gas turbines, ensure the safe operation of hot channel components, and improve the combustion adjustment effect. [0003] The temperature monitoring system of an in-service gas turbine is mainly composed of thermocouples, and its measuring points are arranged in the exhaust section of the turbine, which cannot directly obtain the combustion temperature of the gas turbine. To obtain the outlet temperature of the gas turbine combustor, the outlet temperature of the combustor can only be estimated based on the turbine exhaust...
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IPC IPC(8): G01K11/00
Inventor 肖俊峰王玮王峰李晓丰于飞龙张炯
Owner HUANENG POWER INT INC