Gas turbine combustion chamber test bed outlet analysis sampling heating cooling water system and operation control method thereof

Abstract

The invention relates to the technical field of gas turbines, and particularly discloses a gas turbine combustion chamber test bed outlet analysis, sampling, heating and cooling water system and an operation control method of the gas turbine combustion chamber test bed outlet analysis, sampling, heating and cooling water system. The top of the heating cooling water tank is connected with a heating water return pipeline, a nitrogen supply pipeline, a low-pressure cooling water pipeline and a heating water tank exhaust pipeline, and the heating water return pipeline is connected with a heating water return cooler. According to the heating and cooling water system, the problem of supercooling of the flue gas temperature of flue gas analysis in a traditional cooling mode is solved; the heating and cooling water tank is pressurized through nitrogen, and the pipeline is pressurized through the heating water pump, so that heating water is always in a liquid state, and the heating and cooling water supply stability is improved; and after heat exchange of the analysis sampling device, the heated cooling water is cooled to a target temperature through the heating water return cooler, so that the condition that the internal temperature of the heating water system is uncontrollably and continuously increased along with the increase of the test time is effectively avoided.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of gas turbine combustor test, and relates to combustor test and flue gas analysis technology, in particular to a gas turbine combustor test bench outlet analysis sampling heating and cooling water system and an operation control method thereof, which is used for temperature control and cooling of the analysis sampling device during the test. BACKGROUND

[0002] In the gas turbine combustor test, the flue gas analysis at the combustor outlet is an important measurement means for evaluating the performance and emission characteristics of the gas turbine combustor. Through accurate measurement of the flue gas composition at the combustor outlet, the combustion efficiency, pollutant emission level and stability of the combustion process can be effectively judged. In order to realize real-time analysis of the flue gas at the combustor outlet, an analysis sampling device is usually arranged at the combustor outlet, and the high-temperature and high-pressure flue gas after combustion is led out from the combustor outlet to a flue gas analysis cabinet for subsequent composition analysis, so as to display the emission data at the combustor outlet in real time.

[0003] However, although the analysis sampling device arranged at the combustor outlet can lead out the flue gas after combustion, it has a very short service life due to working in a high-temperature and high-pressure environment with a maximum working temperature of 1800 degrees Celsius. Therefore, normal-temperature cooling water is usually used to continuously cool the analysis sampling device to protect its structural safety and functional integrity. However, although this cooling method can fully cool the analysis sampling device, the flue gas obtained from the combustor outlet is often over-cooled, and even the flue gas temperature is at normal temperature.

[0004] In order to ensure the accuracy of flue gas analysis, the flue gas temperature needs to be at least 160 degrees Celsius. First, at this temperature, the water vapor in the flue gas is not easy to condense into liquid water, thereby avoiding the influence of water vapor condensation on the accuracy of the analysis results. Second, a higher temperature helps to keep various components in the flue gas in a stable state, preventing some components from phase changing and chemical reactions at lower temperatures. In this way, it can be ensured that the composition of the flue gas will not change due to temperature change during the analysis process. Third, most gas analysis instruments have specific requirements for the temperature of the flue gas. 160 degrees Celsius is to make the flue gas meet the best working conditions of the instrument when entering the analysis instrument, so as to improve the accuracy and reliability of the analysis.

[0005] In addition, the heating and cooling water tank and the heating water return cooler in the current system also have the following defects: 1. When the heating and cooling water tank is heated, the internal water and the heating surface cannot fully contact, the heat distribution is uneven, and local overheating or overcooling may occur, affecting the overall heating efficiency; 2. Impurities, minerals or corrosive substances in the water may deposit on the inner wall of the heating water return cooler after long-term use, causing scaling. The accumulation of scale may reduce the heat exchange efficiency and affect the performance of the heating water return cooler, and even cause equipment failure.

[0006] In summary, the existing gas turbine combustor test bench for flue gas analysis sampling cooling water system in temperature control precision, water quality stability, heat transfer reliability and structural safety and other aspects exist in varying degrees of technical bottlenecks. Therefore, how to build a kind of cooling water system can guarantee that the analysis sampling device is effectively cooled, and the flue gas temperature meets the analysis requirements, and has good stability and safety, is a technical problem to be solved in the field of gas turbine combustor test. SUMMARY

[0007] (I) Invention purposes

[0008] The purpose of the present application is to overcome the above-mentioned defects and deficiencies of the prior art, and to provide a gas turbine combustor test bench outlet analysis sampling heating cooling water system and its operation control method, by building an integrated cooling water circulation structure with the functions of pressure control, temperature control, dynamic adjustment, heat exchange and descaling, to solve the problems raised in the above background art. The system uses nitrogen gas to maintain the liquid state of the water body, combines with the turnover device to improve the heating uniformity of the water tank, and introduces the backwater cooler and the wall scraping mechanism to ensure the heat exchange efficiency and the long-term stable operation of the system, to provide heating cooling water for the combustor outlet analysis sampling device, which not only ensures sufficient cooling of the sampling device, but also makes the flue gas at the outlet of the combustor higher than the target temperature (for example, 160℃), improves the accuracy, reproducibility and test safety of the flue gas analysis at the outlet of the combustor.

[0009] (II) Technical solutions

[0010] To achieve the purpose of the present application and solve its technical problems, the present application adopts the following technical solutions:

[0011] The first purpose of the present application is to provide a gas turbine combustor test bench outlet analysis sampling heating cooling water system, which is used for temperature control and cooling of the outlet analysis sampling device during the test of the gas turbine combustor, and ensures that the flue gas temperature is maintained in a set range to ensure the accuracy of the analysis results and the stability of the system operation, at least comprising:

[0012] A heating cooling water tank for storing and heating cooling water;

[0013] A heating water supply pipeline, the inlet end of which is in communication with the heating cooling water tank, and the outlet end of which is in communication with the analysis sampling water inlet device, for conveying the heated cooling water in the tank to the analysis sampling water inlet device;

[0014] A heating water return pipeline, the inlet end of which is in communication with the analysis sampling water return device, and the outlet end of which is in communication with the heating cooling water tank after passing through the hot side of the heating water return cooler, for cooling the high-temperature water returned from the analysis sampling water return device and sending it back to the heating cooling water tank;

[0015] A nitrogen supply pipeline, the inlet end of which is communicated with a nitrogen source, and the outlet end of which is communicated with the heating and cooling water tank, is used for pressurizing the tank, raising the boiling point of the water in the tank and maintaining the liquid stability thereof;

[0016] A low-pressure cooling water pipeline, the inlet end of which is communicated with a low-pressure softened water source, and the outlet end of which is divided into two routes, one of which is communicated with a cooling water pool after passing through the cold side of the heating water return cooler, and the other of which is communicated with the heating and cooling water tank, is used for supplementing water for the system and providing cooling medium required for heat exchange;

[0017] A heating water tank exhaust pipeline, the inlet end of which is communicated with the heating and cooling water tank, and the outlet end of which is communicated with an exhaust tower, is used for actively or passively releasing the pressure in the tank;

[0018] A drain pipeline, the inlet end of which is communicated with the heating and cooling water tank, and the outlet end of which is communicated with the cooling water pool, is used for draining the residual cooling water in the tank when the system is shut down or maintained.

[0019] The second inventive objective of the present application is to provide an operation control method of the heating and cooling water system for the outlet analysis sampling of the gas turbine combustor test bench, which at least comprises the following steps:

[0020] S100. System initialization and preheating preparation:

[0021] First, the low-pressure cooling water pipeline is started to inject low-pressure softened water into the heating and cooling water tank to a preset liquid level, then the nitrogen supply pipeline is started to pressurize the heating and cooling water tank to a preset pressure, and then the electric heater in the heating and cooling water tank is started to uniformly heat the cooling water in the tank to a target temperature;

[0022] S200. Heating and cooling water circulation establishment:

[0023] The heating water supply pipeline and the heating water return pipeline are opened to establish a cooling water circulation loop from the heating and cooling water tank through the analysis sampling water inlet device to the analysis sampling water return device, so as to ensure that the heating and cooling water forms a stable circulation flow in the system;

[0024] S300. Temperature control during operation:

[0025] The temperature and pressure of the return water in the heating water return pipeline are monitored in real time, when the return water temperature exceeds the set upper limit, the connecting branch between the low-pressure cooling water pipeline and the heating water return cooler is opened, so as to ensure that the return water is cooled to the target temperature and then returns to the heating and cooling water tank;

[0026] S400. Pressure safety control during operation:

[0027] The pressure state in the heating cooling water tank is continuously monitored, when the system pressure exceeds the safe operation range, first, the nitrogen supply pipeline is adjusted to reduce the nitrogen supply amount, if the pressure continues to rise to the dangerous threshold, the heating water tank exhaust pipeline is opened, and the overpressure gas is discharged to the exhaust tower;

[0028] S500. End of operation and drainage:

[0029] After the test is completed, the heating water return cooler cold side channel is opened to the maximum opening degree, so that the heating cooling water in the tank is reduced to normal temperature, then the heating water tank exhaust pipeline is opened, the pressure in the heating cooling water tank is slowly released to the normal pressure state, finally, the heating water supply pipeline and the heating water return pipeline are closed and the drainage pipeline is opened, the residual cooling water in the tank body is discharged into the cooling water pool, and the system drainage and pressure relief are completed.

[0030] (Three) Technical effects

[0031] Compared with the prior art, the gas turbine combustion chamber test bench outlet analysis sampling heating cooling water system and the operation control method thereof have the following beneficial and remarkable technical effects:

[0032] (1) Compared with the traditional cooling water system, the heating cooling water system solves the problem of supercooling of flue gas temperature in the traditional cooling method, and solves the actual problem according to the cooling technical requirement.

[0033] (2) The heating cooling water is always in a liquid state through the nitrogen pressurization into the heating cooling water tank and the heating water pump pressurization into the pipeline, so that the stability of the heating cooling water supply is improved.

[0034] (3) After heat exchange through the analysis sampling device, the heating cooling water is cooled to the target temperature (such as 160 DEG C) through the heating water return cooler, so that the uncontrollable continuous increase of the internal temperature of the heating water system with the increase of the test time is effectively avoided.

[0035] (4) The heating cooling water system can not only cool the analysis sampling device, but also cool the measuring section or the flame tube casing, so that the metal deformation caused by the large temperature difference between the normal temperature cooling water and the internal temperature of the test piece is effectively avoided, and has a certain universality.

[0036] (5) The nitrogen supply pipeline is provided with an adjusting valve, the heating water tank exhaust pipeline is provided with a manual valve and a safety valve, and the heating cooling water system has a certain safety.

[0037] (6) The turning device provided in cooperation with the water tank, the connecting rod reciprocating drives the turning plate reciprocating, the turning plate reciprocating can make the water in the water tank fully contact with the heating surface, so that the heat is evenly distributed, the local overheating or overcooling phenomenon is avoided, and the overall heating efficiency is enhanced.

[0038] (7) The wall scraping device provided in cooperation with the warm water return water cooler, the scraper can scrape the inner wall of the warm water return water cooler, avoid scaling, and the accumulation of scale can reduce the heat exchange efficiency, affect the performance of the warm water return water cooler, and even cause equipment failure. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 The arrangement schematic view of the outlet analysis sampling warm cooling water system of the gas turbine combustion chamber test bench provided by the embodiment of the present application is shown in the figure.

[0040] Figure 2 The structural schematic view of the warm cooling water tank in the present application is shown in the figure.

[0041] Figure 3 The structural schematic view of the turning device in the present application is shown in the figure.

[0042] Figure 4 The structural schematic view of the wall scraping device in the present application is shown in the figure.

[0043] Figure 5 The flow chart of the operation control method of the warm cooling water system is shown in the figure.

[0044] BRIEF DESCRIPTION OF DRAWINGS

[0045] 1, warming cooling water tank; 2, warming water supply pipeline; 3, warming water return pipeline; 4, warming water return cooler; 5, nitrogen supply pipeline; 6, low pressure cooling water pipeline; 7, warming water tank exhaust pipeline; 8, drainage pipeline; 9, analysis sampling return water device; 10, low pressure softened water source; 11, nitrogen source; 12, analysis sampling inlet device; 13, exhaust tower; 14, cooling water pool; 15, turning device; 16, wall scraping device; 101, water tank body; 102, electric heater; 103, nitrogen inlet; 104, chemical water inlet interface; 105, pressure sensor A; 106, warming water return interface; 107, active pressure relief interface; 108, passive pressure relief interface; 109, warming water outlet interface; 110, drainage port interface; 111, temperature sensor A; 21, warming water pump; 22, filter A; 23, pressure sensor B; 24, flow meter; 25, temperature sensor B; 31, temperature sensor C; 32, regulating valve A; 33, temperature sensor D; 34, pressure sensor C; 51, regulating valve B; 52, filter B; 53, manual valve A; 61, filter C; 62, manual valve B; 63, manual valve C; 64, temperature sensor E; 65, regulating valve C; 71, manual valve D; 72, safety valve; 81, manual valve E; 1501, motor one; 1502, rotating shaft; 1503, bevel gear one; 1504, back-shaped frame; 1505, rotating rod; 1506, bevel gear two; 1507, threaded groove; 1508, threaded sleeve; 1509, connecting rod; 1510, turning plate; 1601, motor two; 1602, rotating rod; 1603, circular ring; 1604, L-shaped plate; 1605, scraper; 1606, short rod; 1607, protruding block; 1608, spring. DETAILED DESCRIPTION

[0046] The present application aims to provide a gas turbine combustor test bench outlet analysis sampling warming cooling water system and its operation control method, which is used for temperature control and cooling of the outlet analysis sampling device during the gas turbine combustor test process, so as to ensure that the flue gas temperature is maintained in a set range to ensure the accuracy of the analysis results and the stability of the system operation. In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme will be described in more detail below in combination with the drawings in the embodiments of the present application. The described embodiments are exemplary and are intended to explain the present application, but cannot be understood as a limitation of the present application.

[0047] Embodiment 1: warming cooling water system

[0048] As a specific example, please refer to Figure 1The gas turbine combustion chamber test bench outlet analysis sampling and heating cooling water system provided by the embodiment of the application comprises a heating cooling water tank 1, a heating water supply pipeline 2, a heating water return pipeline 3, a nitrogen supply pipeline 5, a low-pressure cooling water pipeline 6, a heating water tank exhaust pipeline 7 and a drainage pipeline 8, a heating water return cooler 4 and a cooling water pool 14 and the like.

[0049] Please refer to Figure 2 In the embodiment of the application, the heating cooling water tank 1 comprises a tank body 101 for storing and heating cooling water, the top of the tank body 101 is provided with a nitrogen inlet 103, a chemical water inlet interface 104, a pressure sensor A 105, a heating water return interface 106, an active pressure relief interface 107 and a passive pressure relief interface 108, one side of the tank body 101 is provided with a heating water outlet interface 109, the other side of the tank body 101 is provided with an electric heater 102 and a temperature sensor A 111, and the bottom of the tank body 101 is provided with a drainage port interface 110. The electric heater 102 is used for heating the chemical water in the heating cooling water tank 1, the temperature sensor A 111 is used for detecting the water temperature in the heating cooling water tank 1 and displaying on a display, and the electric heater 102 is turned off when the water temperature reaches a target temperature (for example, 160 DEG C), and the pressure sensor A 105 is used for detecting the pressure in the heating cooling water tank 1.

[0050] Please refer to Figures 1-2 The nitrogen inlet 103 at the top of the tank body 101 is used for being connected with the nitrogen supply pipeline 5, the nitrogen supply pipeline 5 is connected with a nitrogen source 11, nitrogen is provided to the tank body 101 by the nitrogen supply pipeline 5 for pressure treatment, the saturated steam pressure of water in the tank is improved, and vaporization or cavitation is prevented in a high-temperature state. An adjusting valve B 51, a filter B 52 and a manual valve A 53 are installed on the nitrogen supply pipeline 5, wherein the adjusting valve B 51 is used for controlling the nitrogen supply pressure, the filter B 52 is used for making the water quality in the entire pipeline network clear and impurity-free, and the manual valve A 53 is used for realizing manual start-stop and safety isolation operation, and ensuring controllability and operation safety of the system in the process of pressure increase, pressure relief or maintenance.

[0051] Please refer to Figures 1-2The chemical water inlet interface 104 at the top of the water tank body 101 is used for connection with the low-pressure cooling water pipeline 6, the inlet end of the low-pressure cooling water pipeline 6 is connected with the low-pressure softened water source 10, which is used for supplementing the softened cooling water for the system and meeting the heat source demand of the backwater heat exchange cooling. The low-pressure cooling water pipeline 6 is divided into two branches, wherein the branch in communication with the warming cooling water tank 1 is provided with a filter C61 and a manual valve B62, opening the manual valve B62 can make the low-pressure softened water source 10 enter the warming cooling water tank 1, and the filter C61 is used to make the water quality in the whole pipeline network clear and impurity-free; the other branch is in communication with the cooling water pool 14 after passing through the cold side of the warming water backwater cooler 4, and the branch is sequentially provided with a manual valve C63, a temperature sensor E64 and an adjusting valve C65, the manual valve C63 is located on the inlet pipeline of the cold side of the warming water backwater cooler 4, and the temperature sensor E64 and the adjusting valve C65 are located on the outlet pipeline of the cold side of the warming water backwater cooler 4, which are respectively used for real-time monitoring of the water temperature after cooling and adjusting the low-pressure cooling water flow. The warming water backwater cooler 4 can perform heat exchange treatment on the water in the low-pressure cooling water pipeline 6, the temperature of the low-pressure cooling water after heat exchange is detected by the temperature sensor E64, the low-pressure cooling water flow is controlled by opening the adjusting valve C65, so that the temperature of the warming water after heat exchange is controlled at the target temperature (for example, 160℃), and finally flows into the cooling water pool 14.

[0052] Please refer to Figures 1-2 The warming water backwater interface 106 at the top of the water tank body 101 is used for connection with the warming water backwater pipeline 3, the warming water backwater pipeline 3 between the warming cooling water tank 1 and the warming water backwater cooler 4 is provided with a temperature sensor D33 and a pressure sensor C34, the warming water backwater cooler 4 is connected with the analysis sampling backwater device 9 through the warming water backwater pipeline 3, and the warming water backwater pipeline 3 between the warming water backwater cooler 4 and the analysis sampling backwater device 9 is provided with a temperature sensor C31 and an adjusting valve A32; the analysis sampling backwater device 9 returns the water to the warming water backwater cooler 4 through the warming water backwater pipeline 3, the return speed is controlled by the adjusting valve A32, the temperature before heat exchange is detected by the temperature sensor C31, the water in the warming water backwater pipeline 3 enters the warming water backwater cooler 4 for heat exchange treatment, and the temperature and pressure state of the warming water backwater after heat exchange are monitored by the temperature sensor D33 and the pressure sensor C34, and then the water enters the water tank body 101.

[0053] Please refer to Figures 1-2The active pressure relief interface 107 and the passive pressure relief interface 108 at the top of the water tank body 101 are connected with the exhaust pipeline 7 of the heated water tank provided with the safety valve 72. The outlet end of the exhaust pipeline 7 is connected with the exhaust tower 13. The exhaust pipeline 7 is connected with the active pressure relief interface 107 at the top of the water tank body 101 through a pipeline provided with the manual valve D71 and is connected with the passive pressure relief interface 108 through a pipeline provided with the safety valve 72. During equipment maintenance, system debugging or manual intervention, the heated cooling water tank 1 can be discharged to normal pressure by opening the manual valve D71. When the internal pressure of the heated cooling water tank 1 is overpressure, the safety valve 72 will be automatically opened to protect the heated cooling water tank 1 from overpressure and avoid equipment damage, pipeline burst or thermal runaway risk caused by abnormal overpressure.

[0054] Please refer to Figures 1-2 The heated water outlet interface 109 on the side of the water tank body 101 is used to be connected with the heated water supply pipeline 2. One end of the heated water supply pipeline 2 is connected with the analytical sampling water inlet device 12 for stably conveying the cooling water heated to a set temperature (such as 160 DEG C) in the water tank to the water inlet side of the analytical sampling device. The heated water supply pipeline 2 is provided with a heated water pump 21, a filter A 22, a pressure sensor B 23, a flow meter 24 and a temperature sensor B 25. The heated water supply pipeline 2 is used to convey the water in the water tank body 101 to the water inlet of the analytical sampling device 12. The heated water pump 21 provides conveying power. The filter A 22 filters the heated water to make the water quality in the entire pipeline network clear and impurity-free. The pressure sensor B 23 detects the pressure during conveying. The flow meter 24 detects the flow of the heated water. The temperature sensor B 25 detects the temperature of the heated water.

[0055] Please refer to Figures 1-2 The drain port interface 110 at the bottom of the water tank body 101 is used to be connected with the drain pipeline 8. The outlet end of the drain pipeline 8 is connected with the cooling water pool 14. The drain pipeline 8 is provided with a manual valve E81. The remaining softened water in the tank can be discharged into the cooling water pool 14 by opening the manual valve E81.

[0056] In order to further improve the heating uniformity of the water in the heated cooling water tank 1, avoid local temperature distribution unevenness, dead water area formation and heat exchange efficiency reduction, please refer to Figure 3The embodiment is further provided with a turnover device 15 on the top of the warm cooling water tank 1, which comprises a motor 1501 fixedly connected to the top of the warm cooling water tank 1, an output shaft of the motor 1501 fixedly connected with a rotating shaft 1502, a bevel gear 1503 fixedly connected to the circumferential surface of the rotating shaft 1502, a back-shaped frame 1504 fixedly connected to the inner wall of the warm cooling water tank 1, two rotating rods 1505 rotatably connected to the inner wall of the back-shaped frame 1504, two bevel gears 1506 fixedly connected to the ends of the two rotating rods 1505, the bevel gear 1503 engaged with the bevel gear 1506, and thread grooves 1507 formed on the circumferential surface of the two rotating rods 1505 along the axis, engaged with a thread sleeve 1508 linearly slidable in the back-shaped frame 1504, a connecting rod 1509 fixedly connected to the side surface of the thread sleeve 1508, and a turnover plate 1510 fixedly connected to the side surface of the connecting rod 1509.

[0057] In the embodiment, when the rotating shaft drives the bevel gear 1503 to rotate, the linkage rotating rod and the thread sleeve produce axial reciprocating motion, thereby driving the plurality of turnover plates 1510 to reciprocate in the water tank, realizing dynamic disturbance and large-scale convection enhancement of the liquid in the tank, promoting the cooling water to fully contact with the heating surface, effectively preventing local overheating or dead zone formation, improving thermal efficiency, and enhancing the temperature control stability and response uniformity of the system under continuous heating conditions.

[0058] To ensure that the warm water return water cooler 4 maintains high-efficiency and stable heat exchange performance during long-term operation, avoid problems such as heat exchange efficiency reduction and system thermal resistance increase caused by scale deposition or impurity adhesion, please refer to Figure 4 The embodiment is provided with a wall scraping device 16 on the side of the warm water return water cooler 4, which comprises a motor 1601 fixedly arranged on the side of the warm water return water cooler 4, an output shaft of the motor 1601 fixedly connected with a rotating rod 1602, a circular ring 1603 fixedly connected to the rotating rod 1602, two L-shaped plates 1604 symmetrically arranged on the circumferential surface of the circular ring 1603, a scraping plate 1605 linearly slidable along the axis arranged on the long arm of each L-shaped plate 1604, a short rod 1606 fixedly connected to the end surface of the scraping plate 1605, four protrusions 1607 fixedly arranged on the inner wall of the warm water return water cooler 4 and opposite to the short rod 1606, and a spring 1608 arranged between the scraping plate 1605 and the short arm of the L-shaped plate 1604 perpendicular to the long arm.

[0059] The short rod 1606 is forced to compress inward when passing the protrusion, so that the scraper 1605 generates linear reciprocating motion under the action of the spring 1608, thereby enhancing the scraping effect; the spring 1608 is used to quickly restore the position of the scraper after the short rod is separated from the protrusion, realize periodic expansion and contraction type mechanical descaling, effectively avoid local fouling, flow resistance increase or heat transfer deterioration and other problems, improve the stability and heat exchange efficiency of the long-term operation of the heat exchanger, reduce the frequency of manual cleaning and system operation and maintenance cost.

[0060] The gas turbine combustion chamber test bench outlet analysis sampling and heating cooling water system provided by the embodiment 1 of the present application is shown in the figure, and the working principle is as follows: Figures 1-2

[0061] Before the combustion chamber test, the inlet and return water interfaces of the combustion chamber outlet analysis sampling device are connected to the heating cooling water system, then the manual valve B62 is opened, the low-pressure softened water source 10 enters the heating cooling water tank 1, the heating water pump 21 and the adjusting valve A32 are opened, the outlet pressure of the heating water pump 21 is 3MPa, the water fills the heating water supply pipeline 2 and the heating water return pipeline 3, when the liquid level in the heating water tank reaches two-thirds, the manual valve B62 is closed. The adjusting valve B51, the manual valve A53 are opened, the manual valve D71 and the manual valve E81 are closed, nitrogen is used to pressurize the water tank, when the pressure sensor A105 displays 2MPa, the adjusting valve B51 and the manual valve A53 are closed. When the heating cooling water tank 1 is over-pressured, the safety valve 72 is automatically opened to protect the heating cooling water tank 1 from over-pressurization. Because the low-pressure cooling water pipeline 6 and the nitrogen supply pipeline 5 are provided with the filter B52 and the filter C61, the water quality in the entire pipeline network is clear and free of impurities. Then the electric heater 102 is started to heat the chemical water in the heating cooling water tank 1, when the temperature sensor A111 displays that the water temperature reaches 160℃, the electric heater 102 is closed. Because the heating water pump 21 is always in the starting state, the water temperature in the heating cooling water tank 1, the heating water supply pipeline 2 and the heating water return pipeline 3 all reaches 160℃.

[0062] ​When the above work is completed, the heating and cooling water system is formally put into the combustion chamber test. When the combustion chamber test begins, the heating water pump 21 continues to operate, and the heating water cools the analysis sampling device after passing through the filter A 22. The pressure sensor B 23, the flow meter 24, and the temperature sensor B 25 monitor the pressure, flow, and temperature of the heating and cooling water. The heating and cooling water flow and pressure can be adjusted by the regulating valve A 32. Since the cooling water temperature for cooling the analysis sampling device is 160°C, the flue gas obtained at the combustion chamber outlet will not be lower than this temperature, ensuring the accuracy and reliability of the flue gas analysis. As the temperature at the combustion chamber outlet continues to rise, the return water temperature of the analysis sampling device will also continue to rise. At this time, the temperature sensor C 31 can display the change of the return water temperature of the analysis sampling device in real time. When the return water temperature rises, the manual valve C 63 and the regulating valve C 65 are opened, so that the heating water return water pipeline 3 and the low-pressure cooling water pipeline 6 exchange heat in the heating water return water cooler 4. The temperature sensor D 33 and the pressure sensor C 34 monitor the temperature and pressure state of the heating water return water after heat exchange. The opening degree of the switch regulating valve C 65 is adjusted to control the low-pressure cooling water flow, so that the heating water temperature after heat exchange is controlled at 160°C. The low-pressure cooling water temperature after heat exchange is monitored by the temperature sensor E 64, and finally flows into the cooling water tank 14.

[0063] The regulating valve C 65 is interlocked with the temperature sensor A 111, the temperature sensor B 25, and the temperature sensor D 33. When the temperature sensor A 111, the temperature sensor B 25, and the temperature sensor D 33 all appear serious over-temperature at the same time, the regulating valve C 65 receives the signal sent by the PLC, increases the opening degree of the regulating valve C 65, and increases the heat exchange of the heating water return water cooler 4 to reduce the temperature in the heating water system. If the temperature in the heating water system is too low, the opening degree of the regulating valve C 65 can be automatically reduced or the electric heater 102 can be manually restarted to increase the heating and cooling water temperature in the heating water system.

[0064] When the combustion chamber test is completed, the regulating valve C 65 is opened to the maximum, the temperature of the heating water is reduced to normal temperature through the heat exchange of the heating water return water cooler 4, the manual valve D 71 is slowly opened, the heating and cooling water tank 1 is slowly discharged to normal pressure, and then the heating water pump 21 is closed. The manual valve E 81 is opened, and the remaining softened water in the tank is discharged into the cooling water tank 14.

[0065] After the water enters the warming cooling water tank 1, the electric heater 102 is started, and the motor one 1501 is started, the rotation of the motor one 1501 drives the rotation of the rotating shaft 1502, the rotation of the rotating shaft 1502 drives the rotation of the bevel gear one 1503, the rotation of the bevel gear one 1503 drives the rotation of the bevel gear two 1506, the rotation of the bevel gear two 1506 drives the rotation of the rotating rod 1505, the rotation of the rotating rod 1505 drives the rotation of the screw groove 1507, the rotation of the screw groove 1507 drives the reciprocating movement of the screw sleeve 1508, the reciprocating movement of the screw sleeve 1508 drives the reciprocating movement of the connecting rod 1509, the reciprocating movement of the connecting rod 1509 drives the reciprocating movement of the turnover plate 1510, and the reciprocating movement of the turnover plate 1510 can make the water in the warming cooling water tank 1 fully contact with the heating surface, so that the heat is evenly distributed, the local overheating or overcooling phenomenon is avoided, and the overall heating efficiency is enhanced.

[0066] After the water enters the warming water return cooler 4, the motor two 1601 is started, the rotation of the output shaft of the motor two 1601 drives the rotation of the rotating rod 1602, the rotation of the rotating rod 1602 drives the rotation of the circular ring 1603, the rotation of the circular ring 1603 drives the rotation of the L-shaped plate 1604, the rotation of the L-shaped plate 1604 drives the rotation of the scraper 1605, the rotation of the scraper 1605 drives the rotation of the short rod 1606, the short rod 1606 is in contact with the protrusion 1607 in the process of rotation, the protrusion 1607 moves the scraper 1605 to the inner wall of the L-shaped plate 1604, the movement of the scraper 1605 compresses the spring 1608, and when the short rod 1606 completely passes through the protrusion 1607, the spring 1608 is reset by the elastic force of the spring 1608, so as to reset the scraper 1605, so as to scrape the inner wall of the warming water return cooler 4, avoid scaling, and avoid the accumulation of scale, which reduces the heat exchange efficiency and affects the performance of the warming water return cooler 4, and even causes equipment failure.

[0067] Embodiment 2: operation control method

[0068] Based on the above-mentioned gas turbine combustion chamber test bench outlet analysis sampling warming cooling water system and its detailed structure, component configuration and complete working principle provided by the embodiment 1 of the present application, the embodiment 2 further provides an operation control method applied to the warming cooling water system. The method realizes accurate control of the cooling temperature of the outlet analysis sampling device and dynamic management of the key states such as system pressure and flow through multi-parameter monitoring, closed-loop regulation and safety protection in different operation stages of the system in the gas turbine combustion chamber test process. The operation control method at least includes the following steps:

[0069] S100. System initialization and preheating preparation:

[0070] First open the low-pressure cooling water pipeline 6 on the manual valve B62, so that the low-pressure softening water source 10 to the heating cooling water tank 1 water, until the water level to set the liquid level line (two-thirds of the liquid level); then open the regulating valve B51 and manual valve A53 in turn, through the nitrogen gas supply pipeline 5 to the tank pressurization, until the pressure sensor A105 detects the pressure reaches the preset value (such as 2MPa) after closing the above-mentioned valve; after that start the electric heater 102, under the drive of the turnover device 15 to drive the water body fully disturbed and contact with the heating surface, realize uniform heating; when the temperature sensor A111 monitoring the tank water temperature reaches the set value (such as 160℃), close the heater, complete the system preheating.

[0071] S200. Heating cooling water circulation is established:

[0072] After heating, start the heating water pump 21, and open the heating water supply pipeline 2 and the heating water return pipeline 3 in turn, establish a closed high-temperature cooling water circulation path with the heating cooling water tank 1 as the source, flow through the analysis sampling inlet device 12 and return to the tank through the analysis sampling return device 9, to ensure that the system has a stable operation basis.

[0073] S300. Temperature control during operation:

[0074] During the test, the temperature sensor C31, D33 and B25 continuously monitor the supply and return water temperature in real time; when the return water temperature is detected to exceed the set control upper limit (such as 160℃±2℃), the heat exchange branch between the heating water return cooler 4 and the low-pressure cooling water pipeline 6 is opened, and cooling water is introduced for heat exchange cooling, and the low-pressure cooling water flow is controlled through the regulating valve C65 linkage, to realize the dynamic adjustment and accurate control of the return water temperature, and ensure that the heating water returns to the tank before it drops to the target temperature range.

[0075] S400. Pressure safety control during operation:

[0076] The pressure sensor A105 and the pressure sensor C34 continuously monitor the operating pressure state of the heating cooling water tank 1 and the loop; when the detected pressure exceeds the threshold value, the regulating valve B51 is closed to reduce the nitrogen gas supply; if it still exceeds the upper limit of safety, the manual valve D71 or the automatic safety valve 72 is controlled by the exhaust control logic, and the pressure is released through the exhaust pipeline 7 to avoid system overpressure damage.

[0077] S500. End of operation and drainage:

[0078] After the test, first, the low-pressure cooling water branch of the heated water return water cooler 4 is adjusted to the maximum opening, so that the high-temperature cooling water in the system is quickly reduced to normal temperature; then, the manual valve D71 in the exhaust pipeline 7 is slowly opened, so that the heated cooling water tank 1 is stably released from high pressure to normal pressure; finally, the heated water supply pipeline 2 and the heated water return pipeline 3 are closed, the manual valve E81 on the drainage pipeline 8 is opened, the residual water in the system is drained into the cooling water tank 14, and the safe exit and system unloading of the cycle are completed.

[0079] In summary, the operation control method provided in Embodiment 2, in combination with the system structure in Embodiment 1, can realize accurate temperature control, safe pressure adjustment and efficient emptying of the heated cooling water system during the whole test process of the gas turbine combustion chamber, effectively guarantee the temperature stability of the flue gas sampling and the accuracy of the analysis results, and has good engineering practicability and operability.

[0080] The above embodiments fully and effectively achieve the purposes of the present application. Those skilled in the art can understand that the present application includes but is not limited to the contents described in the drawings and the above specific embodiments. Although the present application has been described in relation to the presently preferred embodiments thereof, it is to be understood that the application is not limited to the disclosed embodiments, and any modification not deviating from the functional and structural principles of the present application shall be included in the scope of the claims.

Claims

1. A gas turbine combustion chamber test bench outlet analysis and sampling heating and cooling water system, characterized in that, At least including: A heating and cooling water tank (1) is used to store and heat cooling water; A heating water supply pipeline (2) has its inlet end connected to the heating and cooling water tank (1) and its outlet end connected to the analysis and sampling water inlet device (12), which is used to transport the heating and cooling water in the tank to the analysis and sampling water inlet device (12). A heating water return pipeline (3) has its inlet end connected to the analysis and sampling return water device (9) and its outlet end connected to the heating and cooling water tank (1) after passing through the hot side of the heating water return water cooler (4). It is used to cool the high temperature water returning from the analysis and sampling return water device (9) and send it back to the heating and cooling water tank (1). A nitrogen supply pipeline (5) is connected to a nitrogen source (11) at its inlet end and to a heating and cooling water tank (1) at its outlet end, and is used to pressurize the heating and cooling water tank (1). A low-pressure cooling water pipeline (6) has its inlet end connected to a low-pressure softened water source (10), and one outlet end is connected to a cooling water pool (14) after passing through the cold side of a heated water return cooler (4), and the other outlet end is connected to a heated cooling water tank (1), which is used to replenish water for the system and provide the cooling medium required for heat exchange. A heating water tank exhaust pipe (7) has its inlet end connected to the heating and cooling water tank (1) and its outlet end connected to the exhaust tower (13), which is used to release the pressure inside the tank in an active or passive manner. A drain pipe (8) is connected at its inlet end to the heating and cooling water tank (1) and at its outlet end to the cooling water pool (14), which is used to drain the residual cooling water inside the tank when the system is shut down or under maintenance.

2. The gas turbine combustion chamber test bench outlet analysis and sampling heating and cooling water system according to claim 1, characterized in that: The heating and cooling water tank (1) includes a tank body (101). The top of the tank body (101) is provided with a nitrogen inlet (103), a chemical water inlet interface (104), a pressure sensor A (105), a heating water return interface (106), an active pressure relief interface (107), and a passive pressure relief interface (108). A heating water outlet interface (109) is provided on one side of the tank body (101). An electric heater (102) and a temperature sensor A (111) are provided on the other side of the tank body (101). A drain outlet interface (110) is provided at the bottom of the tank body (101).

3. The gas turbine combustion chamber test bench outlet analysis and sampling heating and cooling water system according to claim 2, characterized in that: The electric heater (102) is used to heat the chemical water in the heating and cooling water tank (1). The temperature sensor A (111) is used to detect the water temperature in the heating and cooling water tank (1). When the water temperature reaches the preset temperature, the electric heater (102) is turned off. The pressure sensor A (105) is used to detect the pressure in the heating and cooling water tank (1).

4. The gas turbine combustion chamber test bench outlet analysis and sampling heating and cooling water system according to claim 2, characterized in that: The nitrogen inlet (103) at the top of the water tank body (101) is connected to the nitrogen supply pipeline (5), and its inlet end is connected to the nitrogen source (11). The nitrogen supply pipeline (5) is equipped with a regulating valve B (51), a filter B (52) and a manual valve A (53).

5. The gas turbine combustion chamber test bench outlet analysis and sampling heating and cooling water system according to claim 2, characterized in that: The chemical water inlet interface (104) at the top of the water tank body (101) is used to connect to the low-pressure cooling water pipeline (6). Its inlet end is connected to the low-pressure softened water source (10). The low-pressure cooling water pipeline (6) is divided into two branches. A filter C (61) and a manual valve B (62) are installed on the branch that connects to the heating cooling water tank (1). The other branch connects to the cooling water pool (14) through the cold side of the heating water return cooler (4). A manual valve C (63), a temperature sensor E (64), and a regulating valve C (65) are installed in sequence on this branch. The manual valve C (63) is located on the inlet pipe of the heating water return cooler (4) on the cold side. The temperature sensor E (64) and the regulating valve C (65) are located on the outlet pipe of the heating water return cooler (4) on the cold side.

6. The gas turbine combustion chamber test bench outlet analysis and sampling heating and cooling water system according to claim 2, characterized in that: The heating water return port (106) at the top of the water tank body (101) is connected to the heating water return pipeline (3). A temperature sensor D (33) and a pressure sensor C (34) are installed on the heating water return pipeline (3) between the heating cooling water tank (1) and the heating water return cooler (4). A temperature sensor C (31) and a regulating valve A (32) are installed on the heating water return pipeline (3) between the heating water return cooler (4) and the analysis sampling return water device (9).

7. The gas turbine combustion chamber test bench outlet analysis and sampling heating and cooling water system according to claim 2, characterized in that: The active pressure relief port (107) and passive pressure relief port (108) on the top of the water tank body (101) are both connected to the exhaust pipe (7) of the heated water tank. The outlet end of the exhaust pipe (7) is connected to the exhaust tower (13). A manual valve D (71) is provided on the pipeline connected to the active pressure relief port (107), and a safety valve (72) is provided on the pipeline connected to the active pressure relief port (107).

8. The gas turbine combustion chamber test bench outlet analysis and sampling heating and cooling water system according to claim 2, characterized in that: The heating water outlet interface (109) on the side of the water tank body (101) is connected to the heating water supply pipeline (2). The outlet end of the heating water supply pipeline (2) is connected to the analysis sampling water inlet device (12). The heating water supply pipeline (2) is equipped with a heating water pump (21), filter A (22), pressure sensor B (23), flow meter (24) and temperature sensor B (25).

9. The gas turbine combustion chamber test bench outlet analysis and sampling heating and cooling water system according to claim 2, characterized in that: The drain port interface (110) at the bottom of the water tank body (101) is connected to the drain pipe (8), and the outlet end of the drain pipe (8) is connected to the cooling water pool (14) to discharge the residual heating and cooling water inside the water tank to the outside of the system; a manual valve E (81) is installed on the drain pipe (8) to control the drain opening and closing status.

10. The gas turbine combustion chamber test bench outlet analysis and sampling heating and cooling water system according to claim 2, characterized in that: The top of the heating and cooling water tank (1) is provided with a tilting device (15), which includes a motor (1501). The bottom of the motor (1501) is fixedly connected to the top of the heating and cooling water tank (1). The output shaft of the motor (1501) is fixedly connected to a rotating shaft (1502). A bevel gear (1503) is fixedly connected to the circumferential surface of the rotating shaft (1502). A loop frame (1504) is fixedly connected to the inner wall of the heating and cooling water tank (1). Two rotating rods (1505) are rotatably connected to the inner wall of the loop frame (1504). The ends of the two rotating rods (1505) are respectively fixedly connected to bevel gears (1506). The first bevel gear (1503) meshes with the second bevel gear (1506). Threaded grooves (1507) are provided on the circumferential surfaces of the two rotating rods (1505) extending along their axes. The threaded grooves (1507) mesh with threaded sleeves (1508) that can slide linearly in the loop frame (1504). A connecting rod (1509) is fixedly connected to the side of the threaded sleeve (1508), and a flipping plate (1510) is fixedly connected to the side of the connecting rod (1509).

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