Gas turbine blade cleaning system and method

Abstract

The present application discloses a gas turbine blade cleaning system and method, and relates to the technical field of gas turbines. The cleaning system comprises: a cleaning tank for storing cleaning liquid for cleaning the blades; a liquid outlet pipeline; the first end of the liquid outlet pipeline is connected to the interior of the cleaning tank; the second end of the liquid outlet pipeline is provided with a cleaning nozzle; an air intake pipeline is connected to the cleaning tank, and is used to introduce compressed gas into the interior of the cleaning tank. The present application uses compressed gas to drive the cleaning liquid, which can accurately adjust the flow rate of the cleaning liquid, and can avoid the phenomenon of excessive cleaning flow rate contaminating the lubricating oil in the bearing cavity, and can also avoid the phenomenon of insufficient cleaning flow rate and unclean cleaning of the blades. That is, the gas turbine blade cleaning system proposed in the present application can be applied to gas turbines of different models, and has strong adaptability.

Description

Technical Field

[0001] The present application relates to the technical field of gas turbines, and in particular to a gas turbine blade cleaning system and method. Background Art

[0002] When the gas turbine is running, the dust and pollutant particles in the inhaled air and some of the metal oxides, oil stains and carbon deposits generated inside the gas turbine during long-term operation will adhere to the compressor blades to form a layer of scale. If the scale is not removed, it will affect the performance of the gas turbine and cause safety problems. At this time, it is necessary to clean the compressor blades. By regularly cleaning the compressor blades of each stage of the gas turbine, the corrosion of the compressor blades by pollutants can be slowed down and the life of the blades can be increased. At present, there are few mature and effective compressor blade cleaning systems, and most of the cleaning systems are electrically driven (for example: motors or electric pumps, etc.). If electric drive is used, it is difficult to adjust different cleaning flow rates for different gas turbines due to the fixed output. For compressors with a large number of blade stages, when cleaning a certain stage of blades, if the cleaning flow rate is too large, the cleaning liquid cannot be discharged from the compressor in time, which easily causes the cleaning liquid to accumulate inside the compressor, thereby contaminating the lubricating oil in the bearing cavity; if the cleaning flow rate is too small, the cleaning effect cannot be achieved. In other words, different types of gas turbines have different requirements for cleaning flow rates. Since the existing cleaning system can only have a fixed output, it is unable to output different cleaning flow rates, that is, it is unable to adapt to different gas turbines. Summary of the invention

[0003] The purpose of the present application is to provide a gas turbine blade cleaning system and method thereof, so as to solve the technical problem that the gas turbine blade cleaning system in the prior art cannot be applied to different gas turbines.

[0004] To achieve the above objectives, this application provides the following technical solutions:

[0005] In a first aspect, the present application proposes a technical solution for a gas turbine blade cleaning system, the cleaning system comprising:

[0006] A cleaning tank, used for storing cleaning liquid for cleaning the blades;

[0007] A liquid outlet pipeline; a first end of the liquid outlet pipeline is connected to the interior of the cleaning tank; a cleaning nozzle is provided at the second end of the liquid outlet pipeline;

[0008] An air inlet pipeline is connected to the cleaning tank and is used to introduce compressed gas into the interior of the cleaning tank.

[0009] As a specific solution in the technical solution of the present application, the air intake pipeline is provided with a first solenoid valve, and the first solenoid valve is used to control the on-off of the air intake pipeline.

[0010] As a specific solution in the technical solution of the present application, the air intake pipeline is also provided with a pressure gauge and a safety valve, and the pressure gauge is electrically connected to the first solenoid valve.

[0011] As a specific solution in the technical solution of the present application, the liquid outlet pipeline is sequentially provided with a second solenoid valve, a flow sensor and a flow valve along a first direction; the first direction points from the first end of the liquid outlet pipeline to the second end of the liquid outlet pipeline.

[0012] As a specific solution in the technical solution of the present application, the cleaning system also includes a controller; the first solenoid valve, the second solenoid valve, the flow sensor and the flow valve are all electrically connected to the controller.

[0013] As a specific solution in the technical solution of the present application, the cleaning system also includes a liquid return pipeline, one end of the liquid return pipeline is connected to the overflow port of the flow valve, and the other end of the liquid return pipeline is connected to the cleaning tank.

[0014] As a specific solution in the technical solution of the present application, the liquid outlet pipeline is also provided with a filter.

[0015] As a specific solution in the technical solution of the present application, the cleaning tank is also provided with a liquid inlet pipe and a pressure relief pipe; the liquid inlet pipe is provided with a liquid inlet valve, and the pressure relief pipe is provided with a pressure relief valve.

[0016] As a specific solution in the technical solution of the present application, the cleaning tank is also provided with a heater and a temperature detector; the heater is used to heat the cleaning liquid in the cleaning tank; the temperature detector is used to detect the temperature of the cleaning liquid in the cleaning tank.

[0017] As a specific solution in the technical solution of the present application, a sewage discharge tee is also provided at the bottom of the cleaning tank; the sewage discharge tee has a first port, a second port and a third port; the first port of the sewage discharge tee is connected to the interior of the cleaning tank; the second port of the sewage discharge tee is connected to the first end of the liquid outlet pipeline; when the cleaning system is used, the third port of the sewage discharge tee is blocked.

[0018] In a second aspect, the present application provides a gas turbine blade cleaning method, wherein the cleaning method uses the gas turbine blade cleaning system as described in any one of the first aspects, and the cleaning method comprises:

[0019] The starter motor of the gas turbine is used to drive the compressor blades to rotate; the compressor blades include low-pressure blades and high-pressure blades;

[0020] Adjust the high-pressure blades to the maximum opening and the low-pressure blades to the minimum opening;

[0021] Introducing compressed gas into the cleaning tank through the air inlet pipeline, so that the cleaning liquid in the cleaning tank can be sprayed toward the compressor blades through the liquid outlet pipeline and the cleaning nozzle;

[0022] After the cleaning time reaches the first preset time, the high-pressure blade is adjusted to the minimum opening, and the low-pressure blade is adjusted to the maximum opening;

[0023] After the cleaning time reaches the second preset time, the starter motor is turned off and the cleaning is stopped.

[0024] Compared with the prior art, the beneficial effects of this application are:

[0025] The present application uses compressed gas to drive the cleaning liquid, which can accurately adjust the flow rate of the cleaning liquid, which can not only avoid the phenomenon of excessive cleaning flow rate contaminating the lubricating oil in the bearing cavity, but also avoid the phenomenon of insufficient cleaning flow rate and incomplete cleaning of the blades. That is, the gas turbine blade cleaning system proposed in the present application can be applied to gas turbines of different models, and has strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of a gas turbine blade cleaning system proposed in an embodiment of the present application;

[0027] Figure 2 This is a schematic diagram of the structure of another gas turbine blade cleaning system proposed in an embodiment of the present application.

[0028] In the figure: 1. cleaning tank; 11. sliding wheel; 12. liquid inlet valve; 13. pressure relief valve; 14. heater; 15. temperature detector; 16. sewage discharge tee pipe; 2. liquid outlet pipeline; 21. filter; 22. second solenoid valve; 23. flow sensor; 24. flow valve; 241. liquid return pipeline; 25. second quick connector; 3. air inlet pipeline; 31. first quick connector; 32. first solenoid valve; 33. pressure gauge; 34. safety valve; 4. cleaning nozzle; 5. controller. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] It should be noted that, in the description of the present application, the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0031] Furthermore, it should be understood that for the sake of ease of description, the sizes of the various components shown in the drawings are not drawn according to actual proportions. For example, the thickness or width of certain layers may be exaggerated relative to other layers.

[0032] It should be noted that like reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined or described in one drawing, it will not require further detailed discussion and description in the description of the subsequent drawings.

[0033] In order to solve the technical problem that it is difficult to accurately adjust the cleaning flow rate of the gas turbine blade cleaning system in the prior art, the present application proposes an embodiment of the gas turbine blade cleaning system, such as Figure 1 and Figure 2 As shown, the cleaning system includes a cleaning tank 1, a liquid outlet pipeline 2 and an air inlet pipeline 3. The cleaning tank 1 is used to store cleaning liquid for cleaning blades. The first end of the liquid outlet pipeline 2 is connected to the inside of the cleaning tank 1, and the second end of the liquid outlet pipeline 2 is provided with a cleaning nozzle 4. The air inlet pipeline 3 is connected to the cleaning tank 1 and is used to introduce compressed gas into the inside of the cleaning tank 1.

[0034] In the embodiments of the present application, the compressed gas may be any suitable gas, such as air, nitrogen or an inert gas.

[0035] When in use, the air inlet pipe 3 is connected to the compressed gas device, and the compressed gas in the compressed gas device can enter the cleaning tank 1 through the air inlet pipe 3, that is, the pressure inside the cleaning tank 1 increases. If the pressure inside the cleaning tank 1 increases, the cleaning liquid in the cleaning tank 1 can be sprayed out through the liquid outlet pipe 2 and the cleaning nozzle 4.

[0036] In the embodiment of the present application, the compressed gas device may be any device capable of delivering compressed gas to the interior of the cleaning tank 1 , for example, the compressed gas device may be an air compressor or a compression tank storing compressed gas.

[0037] It should be noted that, in the embodiment of the present application, the flow rate of the cleaning liquid sprayed by the cleaning nozzle 4 is positively correlated with the pressure in the cleaning tank 1 (that is, the pressure of the compressed gas); if the pressure in the cleaning tank 1 is greater, the flow rate of the cleaning liquid sprayed by the cleaning nozzle 4 is greater; if the pressure in the cleaning tank 1 is smaller, the flow rate of the cleaning liquid sprayed by the cleaning nozzle 4 is smaller. That is to say, in the embodiment of the present application, the flow rate of the cleaning liquid sprayed by the cleaning nozzle 4 can be controlled by controlling the pressure of the compressed gas input into the cleaning tank 1. It is easy to understand that the pressure of the compressed gas is easy to accurately control (for example, using a compressed gas tank with different pressures), that is, the flow rate of the cleaning liquid sprayed by the cleaning nozzle 4 is easy to accurately control. In order to ensure the stability of the compressed gas pressure, the volume of the compressed gas tank can be much larger than the volume of the cleaning tank 1, for example: the compressed gas tank can be 100 times the volume of the cleaning tank 1, etc., that is, even if the cleaning liquid in the cleaning tank 1 is emptied, the pressure of the entire system can remain stable.

[0038] As can be seen from the above, compared with the use of electrically driven cleaning fluid in the prior art, the embodiments of the present application use compressed gas to drive the cleaning fluid, which can more accurately adjust the flow rate of the cleaning fluid, which can avoid the phenomenon that the cleaning flow rate is too large, and the cleaning fluid accumulates inside the compressor and contaminates the lubricating oil in the bearing cavity, and can also avoid the phenomenon that the cleaning flow rate is too small and the blades are not cleaned cleanly. It is easy to understand that since compressed gas is used to drive the cleaning fluid, if the liquid outlet pipeline is located at the bottom of the cleaning tank, all the cleaning fluid inside the cleaning tank can be discharged. However, the use of electrically driven cleaning fluid has a minimum liquid level requirement for the cleaning fluid inside the cleaning tank, that is, the use of electric drive cannot discharge all the cleaning fluid inside the cleaning tank.

[0039] In the embodiment of the present application, the cleaning nozzle 4 can be any nozzle on the market. In order to improve the cleaning effect and allow the gas turbine blades (i.e., the compressor blades hereinafter) to be soaked in the cleaning liquid at all locations, in the embodiment of the present application, the cleaning nozzle 4 can be an atomizing nozzle.

[0040] As can be seen from the foregoing, the embodiment of the present application can input compressed gas of different pressures into the cleaning tank 1 through the compressed gas device, thereby accurately controlling the flow rate of the cleaning liquid sprayed by the cleaning nozzle 4. In order to facilitate the connection of the compressed gas device with the air intake pipeline 3, as shown in FIG. Figure 1 and Figure 2 As shown, the air intake pipeline 3 may be provided with a first quick connector 31. In the embodiment of the present application, the first quick connector 31 may be any suitable quick connector on the market. Since the quick connector for pipelines is a mature technology, it will not be described in detail here.

[0041] In the embodiment of the present application, the cleaning nozzle 4 can be an integrated structure with the liquid outlet pipeline 2. In order to facilitate the replacement of different cleaning nozzles 4 for different types of gas turbines, in a specific embodiment of the present application, Figure 1 and Figure 2 As shown, the liquid outlet pipeline 2 can be provided with a second quick connector 25, that is, the cleaning nozzle 4 and the liquid outlet pipeline 2 are connected via the second quick connector 25. In the embodiment of the present application, the second quick connector 25 can be any suitable quick connector on the market. Since the quick connector for pipelines is a mature technology, it will not be described here.

[0042] In order to facilitate the control of the on-off of the intake pipe 3, in one embodiment of the present application, Figure 2 As shown, the air intake pipeline 3 may be provided with a first solenoid valve 32, which is used to control the on-off of the air intake pipeline 3. If cleaning is required, the air intake pipeline 3 is opened by the first solenoid valve 32, so that the compressed gas in the compressed gas device can enter the cleaning tank 1 through the air intake pipeline 3; if cleaning is completed, the air intake pipeline 3 is closed by the first solenoid valve 32 to cut off the connection between the cleaning tank 1 and the compressed gas device.

[0043] In order to avoid the instability of the pressure of the compressed gas generated by the compressed gas device, which may cause the flow rate of the cleaning liquid sprayed from the cleaning nozzle 4 to be unstable, in one embodiment of the present application, Figure 2 As shown, the air intake pipeline 3 may be provided with a pressure gauge 33 and a safety valve 34, and the pressure gauge 33 is electrically connected to the first solenoid valve 32. The pressure gauge 33 is used to monitor the pressure of the compressed gas in the air intake pipeline 3. If the compressed gas in the air intake pipeline 3 fluctuates too much, the air intake pipeline 3 may be closed by the first solenoid valve 32. The safety valve 34 is used to release part of the compressed gas in the air intake pipeline 3 when the pressure of the compressed gas in the air intake pipeline 3 is too high, so as to avoid the pressure of the compressed gas in the air intake pipeline 3 being too high and damaging the air intake pipeline 3 or the cleaning tank 1 and other equipment.

[0044] In order to facilitate the control of the on-off of the liquid outlet pipeline 2, in one embodiment of the present application, Figure 2 As shown, the liquid outlet pipeline 2 may also be provided with a second solenoid valve 22. If the compressor blades need to be cleaned, the liquid outlet pipeline 2 is opened by the second solenoid valve 22 so that the cleaning tank 1 and the cleaning nozzle 4 can be connected; if the cleaning is completed, the liquid outlet pipeline 2 is closed by the second solenoid valve 22 to cut off the connection between the cleaning tank 1 and the cleaning nozzle 4.

[0045] In order to be able to further accurately control the flow rate of the cleaning liquid sprayed by the cleaning nozzle 4, in one embodiment of the present application, the liquid outlet pipeline 2 may also be provided with a flow sensor 23 and a flow valve 24. The flow sensor 23 is used to monitor the flow rate of the cleaning liquid in the liquid outlet pipeline 2, and the flow valve 24 is used to adjust the flow rate of the cleaning liquid in the liquid outlet pipeline 2. That is to say, in the embodiment of the present application, if the flow sensor 23 detects that the flow rate of the cleaning liquid is small, the flow rate of the cleaning liquid is increased through the flow valve 24; if the flow sensor 23 detects that the flow rate of the cleaning liquid is large, the flow rate of the cleaning liquid is reduced through the flow valve 24.

[0046] In the embodiment of the present application, there is no restriction on the positions of the second solenoid valve 22, the flow sensor 23 and the flow valve 24 on the liquid outlet pipeline 2. In a specific embodiment of the present application, Figure 2 As shown, the second solenoid valve 22, the flow sensor 23 and the flow valve 24 are sequentially arranged in the liquid outlet pipeline 2 along a first direction. The first direction points from the first end of the liquid outlet pipeline 2 to the second end of the liquid outlet pipeline 2.

[0047] In the embodiment of the present application, the flow valve 24 may be an overflow flow valve, that is, if the flow rate of the cleaning liquid in the liquid outlet pipeline 2 is too large, the flow valve 24 will overflow the excess cleaning liquid from the overflow port to ensure that the flow rate of the cleaning liquid in the liquid outlet pipeline 2 is constant. In order to avoid the waste of cleaning liquid, in one embodiment of the present application, Figure 2 As shown, the cleaning system may further include a liquid return line 241, one end of which is connected to the overflow port of the flow valve 24, and the other end of which is connected to the cleaning tank 1. That is, in this embodiment, if the flow rate of the cleaning liquid in the liquid outlet line 2 is too large, the excess cleaning liquid can overflow through the overflow port of the flow valve 24, and then return to the cleaning tank 1 through the liquid return line 241, thereby avoiding the waste of the cleaning liquid.

[0048] In order to be able to remotely and automatically control the gas turbine blade cleaning system, in the embodiment of the present application, the cleaning system further includes a controller 5. In the present embodiment, the first solenoid valve 32, the second solenoid valve 22, the flow sensor 23 and the flow valve 24 are all electrically connected to the controller 5. That is, in the embodiment of the present application, the first solenoid valve 32, the second solenoid valve 22 and the flow valve 24 can be automatically or remotely controlled by the controller 5.

[0049] In order to prevent hard impurities (such as metal particles or sand particles) in the cleaning liquid from entering the compressor and damaging the compressor when the compressor is working, in one embodiment of the present application, the liquid outlet pipeline 2 is also provided with a filter 21. The filter 21 can filter the cleaning liquid to prevent hard impurities from entering the compressor. In order to prevent hard impurities from damaging other components in the liquid outlet pipeline 2 (such as the second solenoid valve 22, flow sensor 23 and flow valve 24 mentioned above), in one embodiment of the present application, Figure 2 As shown, the filter 21 can be arranged between the second solenoid valve 22 and the cleaning tank 1 .

[0050] In the embodiments of the present application, there is no limitation on the shape, structure and type of the filter 21. For example, the filter 21 may be a filter cartridge filter or a filter element. Figure 2 Y-type strainer shown.

[0051] In order to facilitate the injection of cleaning liquid into the cleaning tank 1, in the embodiment of the present application, the cleaning tank 1 may also be provided with a liquid inlet pipe. In order to facilitate the opening and closing of the liquid inlet pipe, the liquid inlet pipe may be provided with a liquid inlet valve 12. In order to release the pressure in the cleaning tank 1 after cleaning is completed, in the embodiment of the present application, the cleaning tank 1 may also be provided with a pressure relief pipe. In order to facilitate the opening and closing of the pressure relief pipe, the pressure relief pipe may be provided with a pressure relief valve 13.

[0052] In the embodiments of the present application, there is no restriction on the composition of the cleaning liquid. For example, the cleaning liquid can be clean water, or the cleaning liquid can be a mixture of water and a cleaning agent. It should be noted that some cleaning agents need to be at a specific temperature to achieve the best effect, such as alkaline cleaning agents, NH3 cleaning agents or HCl cleaning agents. In order to ensure that the cleaning agent in the cleaning tank 1 can be at the optimal operating temperature when using the cleaning agent, in one embodiment of the present application, the cleaning tank 1 is also provided with a heater 14 and a temperature detector 15. Specifically, the heater 14 is used to heat the cleaning liquid in the cleaning tank 1, and the temperature detector 15 is used to detect the temperature of the cleaning liquid in the cleaning tank 1. When in use, the cleaning liquid can be heated to the optimal operating temperature of the cleaning agent by the heater 14.

[0053] In order to facilitate emptying the cleaning tank 1 after the cleaning work is completed, a sewage discharge tee 16 may also be provided at the bottom of the cleaning tank 1 in the embodiment of the present application. The sewage discharge tee 16 has a first port, a second port and a third port; the first port of the sewage discharge tee 16 is connected to the interior of the cleaning tank 1; the second port of the sewage discharge tee 16 is connected to the first end of the liquid outlet pipeline 2. When using the cleaning system, the third port of the sewage discharge tee 16 is blocked to prevent the cleaning liquid in the cleaning tank 1 from leaking from the third port of the sewage discharge tee 16. After the cleaning is completed, the blockage of the third port of the sewage discharge tee 16 is removed so that the cleaning liquid in the cleaning tank 1 can flow out from the third port of the sewage discharge tee 16, that is, the cleaning tank 1 is emptied.

[0054] In order to facilitate confirmation of the liquid level of the cleaning liquid in the cleaning tank 1, in the embodiment of the present application, a glass tube liquid level gauge (not shown in the figure) can also be provided on the cleaning tank 1. Figure 1 and Figure 2 As shown, a sliding wheel 11 is arranged at the bottom of the cleaning tank 1. The sliding wheel 11 can be a wheel capable of stopping braking.

[0055] It should be clear that the gas turbine blade cleaning system proposed in the embodiment of the present application uses compressed air to drive the cleaning liquid, which can not only accurately control the flow rate of the cleaning liquid, but also ensure the cleaning quality. In other words, the gas turbine blade cleaning system can be applied to cleaning different types of gas turbines, improving the versatility of the gas turbine blade cleaning system.

[0056] After introducing the embodiment of the gas turbine blade cleaning system proposed in the present application, a gas turbine blade cleaning method proposed in the present application is introduced below. The cleaning method uses the gas turbine blade cleaning system proposed in any one of the above embodiments, and the cleaning method includes steps S100 to S500.

[0057] Before using the gas turbine blade cleaning system to clean the compressor blades, preparation work needs to be completed. Specifically, the preparation work is as follows:

[0058] Ensure that the pressure relief valve 13 is closed; ensure that the sliding wheel 11 is braked; confirm the liquid level of the cleaning liquid in the cleaning tank 1 so that the cleaning liquid in the cleaning tank 1 can at least meet the single cleaning requirement. If the cleaning liquid in the cleaning tank 1 is insufficient, it is necessary to inject cleaning liquid into the cleaning tank 1 through the liquid inlet pipe; ensure that the liquid inlet valve 12 is closed; confirm the temperature of the cleaning liquid through the temperature detector 15. If the temperature of the cleaning liquid does not reach the optimal operating temperature of the cleaning agent, the cleaning liquid is heated to the optimal operating temperature through the heater 14.

[0059] Step S100: using the starter motor of the gas turbine to drive the compressor blades to rotate.

[0060] It should be noted that starting the motor to drive the compressor blades to rotate is a mature technology and will not be described in detail here. In this embodiment, the compressor blades include low-pressure blades and high-pressure blades.

[0061] Step S200: adjusting the high-pressure blade to the maximum opening, and adjusting the low-pressure blade to the minimum opening.

[0062] It should be noted that adjusting the opening of the compressor blades is a mature technology and will not be described in detail here. In this embodiment, after the high-pressure blades are adjusted to the maximum opening and the low-pressure blades are adjusted to the minimum opening, the cleaning liquid sprayed by the cleaning nozzle 4 can form a splash between the high-pressure blades and the low-pressure blades, which is conducive to the cleaning liquid infiltrating the high-pressure blades and the low-pressure blades.

[0063] Step S300: Introducing compressed gas into the cleaning tank 1 through the air inlet pipeline 3, so that the cleaning liquid in the cleaning tank 1 can be sprayed toward the compressor blades through the liquid outlet pipeline 2 and the cleaning nozzle 4.

[0064] It should be clear that in the embodiment of the present application, after the air intake line 3 is connected to the compressed gas device, it is only necessary to open the first solenoid valve 32 and the second solenoid valve 22 in sequence. In the present embodiment, a compressed gas device with a suitable compressed gas pressure can be selected according to the needs. For example, in one embodiment of the present application, a compressed gas device that generates a compressed gas pressure greater than or equal to 0.6MPa and less than or equal to 0.8MPa can be selected.

[0065] Step S400: After the cleaning time reaches the first preset time, the high-pressure blade is adjusted to the minimum opening, and the low-pressure blade is adjusted to the maximum opening.

[0066] It should be clear that in the embodiment of the present application, the first preset time refers to the time expected to clean the compressor blades. That is to say, in the present embodiment, the first preset time can be set according to demand. For example, if after multiple experiments, it takes at least 2 minutes to clean the compressor blades, the first preset time can be 2 minutes, and of course it can also be 3 minutes or 4 minutes. In other words, in the present embodiment, if one side of the compressor blades is cleaned within the first preset time, the angle of the compressor blades (that is, the high-pressure blades and the low-pressure blades) is adjusted to clean the other side of the compressor blades.

[0067] Step S500: After the cleaning time reaches the second preset time, the starter motor is turned off and the cleaning is stopped.

[0068] In the embodiment of the present application, the second preset time is also set according to the demand. For example, the second preset time may be equal to the first preset time. Alternatively, the second preset time may also be greater than the first preset time.

[0069] In an embodiment of the present application, after the cleaning is completed, the starter motor, the second solenoid valve 22 and the first solenoid valve 32 are closed in sequence. If it is observed that the compressor blades are not cleaned, or the cleaning fluid flowing out of the gas turbine is relatively turbid, steps S100 to S500 can be repeated to clean the compressor blades. In order to allow the cleaning fluid of the last cleaning to fully infiltrate the compressor blades, the time interval between two adjacent flushings can be 15 minutes. Of course, in other embodiments of the present application, a suitable time interval can be selected according to actual needs. For example, if the gas turbine is large, the time interval can be appropriately increased; if the gas turbine is small, the time interval can be appropriately reduced.

[0070] After the compressor blades are cleaned, the openings of the high-pressure blades and the low-pressure blades can be adjusted to the minimum openings. Observe the pressure gauge 33. If the pressure gauge 33 shows that the inside of the cleaning tank 1 has a large pressure (that is, the pressure inside the cleaning tank 1 is greater than the atmospheric pressure), open the pressure relief valve 13 to relieve the pressure of the cleaning tank 1. After the pressure inside the cleaning tank 1 is the same as the atmospheric pressure, the remaining cleaning liquid inside the cleaning tank 1 is drained through the sewage three-way pipe 16.

[0071] It should be clear that the gas turbine blade cleaning method proposed in the embodiment of the present application uses compressed gas to drive the cleaning liquid, which can more accurately adjust the flow of the cleaning liquid, and can avoid the phenomenon of excessive cleaning flow contaminating the lubricating oil in the bearing cavity, and can also avoid the phenomenon of insufficient cleaning flow and incomplete cleaning of the blades. That is, the gas turbine blade cleaning system proposed in the present application can be applied to gas turbines of different models and has strong adaptability.

[0072] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A gas turbine blade cleaning method, characterized in that: A gas turbine blade cleaning system was used; The cleaning system comprises: A cleaning tank (1), used for storing cleaning liquid for cleaning the blades; a liquid outlet pipeline (2); a first end of the liquid outlet pipeline (2) being in communication with the interior of the cleaning tank (1); a second end of the liquid outlet pipeline (2) being provided with a cleaning nozzle (4); An air inlet pipeline (3) connected to the cleaning tank (1) and used for introducing compressed gas into the interior of the cleaning tank (1); A compressed gas tank connected to the air inlet pipeline (3); the volume of the compressed gas tank is 100 times the volume of the cleaning tank (1); The liquid outlet pipeline (2) is located at the bottom of the cleaning tank (1); The cleaning method comprises: The starter motor of the gas turbine is used to drive the compressor blades to rotate; the compressor blades include low-pressure blades and high-pressure blades; Adjust the high-pressure blades to the maximum opening and the low-pressure blades to the minimum opening; The cleaning liquid sprayed from the cleaning nozzle (4) can form splashes between the high-pressure blades and the low-pressure blades, which is conducive to the cleaning liquid infiltrating the high-pressure blades and the low-pressure blades; Introducing compressed gas into the interior of the cleaning tank (1) through an air inlet pipeline (3) so that cleaning liquid in the cleaning tank (1) can be sprayed toward the compressor blades through a liquid outlet pipeline (2) and a cleaning nozzle (4); After the cleaning time reaches the first preset time, the high-pressure blade is adjusted to the minimum opening, and the low-pressure blade is adjusted to the maximum opening; After the cleaning time reaches the second preset time, the starter motor is turned off and the cleaning is stopped.

2. The gas turbine blade cleaning method according to claim 1, characterized in that: The air intake pipeline (3) is provided with a first solenoid valve (32), and the first solenoid valve (32) is used to control the on-off of the air intake pipeline (3).

3. The gas turbine blade cleaning method according to claim 2, characterized in that: The air intake pipeline (3) is also provided with a pressure gauge (33) and a safety valve (34), and the pressure gauge (33) is electrically connected to the first solenoid valve (32).

4. The gas turbine blade cleaning method according to claim 3, characterized in that: The liquid outlet pipeline (2) is provided with a second solenoid valve (22), a flow sensor (23) and a flow valve (24) in sequence along a first direction; the first direction points from the first end of the liquid outlet pipeline (2) to the second end of the liquid outlet pipeline (2).

5. The gas turbine blade cleaning method according to claim 4, characterized in that: The cleaning system further comprises a controller (5); the first solenoid valve (32), the second solenoid valve (22), the flow sensor (23) and the flow valve (24) are all electrically connected to the controller (5).

6. The gas turbine blade cleaning method according to claim 4 or 5, characterized in that: The cleaning system further comprises a liquid return pipeline (241), one end of the liquid return pipeline (241) being connected to an overflow port of the flow valve (24), and the other end of the liquid return pipeline (241) being connected to the cleaning tank (1).

7. The gas turbine blade cleaning method according to any one of claims 1 to 5, characterized in that: The liquid outlet pipeline (2) is also provided with a filter (21).

8. The gas turbine blade cleaning method according to any one of claims 1 to 5, characterized in that: The cleaning tank (1) is also provided with a liquid inlet pipe and a pressure relief pipe; the liquid inlet pipe is provided with a liquid inlet valve (12), and the pressure relief pipe is provided with a pressure relief valve (13).

9. The gas turbine blade cleaning method according to any one of claims 1 to 5, characterized in that: The cleaning tank (1) is further provided with a heater (14) and a temperature detector (15); the heater (14) is used to heat the cleaning liquid in the cleaning tank (1); and the temperature detector (15) is used to detect the temperature of the cleaning liquid in the cleaning tank (1).

10. The gas turbine blade cleaning method according to any one of claims 1 to 5, characterized in that: A sewage discharge tee (16) is also provided at the bottom of the cleaning tank (1); the sewage discharge tee (16) has a first port, a second port and a third port; the first port of the sewage discharge tee (16) is connected to the interior of the cleaning tank (1); the second port of the sewage discharge tee (16) is connected to the first end of the liquid outlet pipeline (2); when the cleaning system is used, the third port of the sewage discharge tee (16) is blocked.

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