Control device for realizing efficient washing of gas turbine

Abstract

The utility model relates to the technical field of gas turbine washing equipment, in particular to a gas turbine efficient washing control device which comprises a seat plate, a water tank arranged at the upper end of the seat plate, a water pump set and a control cabinet arranged on one side of the water tank, a protection box arranged on the back face of a flow guide pipe network, and an overflow piece arranged in the protection box. The valve seat is fixedly connected to the inner side of the protection box, a water inlet and a water outlet are formed in the outer side of the valve seat, a spring valve plate is slidably arranged in the valve cavity, and an adjusting mechanism for adjusting spring pressure of the spring valve plate is arranged at the upper end of the valve seat. Under the control of the washing system, the water pump set pumps washing liquid out of the water tank, pressurizes the washing liquid and then conveys the washing liquid into a washing part of the gas turbine, when liquid in the water tank passes through the overflow piece, the spring valve plate in the valve seat is ejected open under the action of water pressure, and the water inlet is communicated with the water outlet through the valve cavity; the spring pressure of the spring valve plate is adjusted through the adjusting mechanism, continuous use of the overflow piece is guaranteed, and the service life is longer.

Description

Technical Field

[0001] This utility model relates to the technical field of gas turbine water washing equipment, and in particular to a control device for achieving high-efficiency water washing of gas turbines. Background Technology

[0002] During long-term operation of a gas turbine, particulate pollutants such as dust and oil in the air can enter the compressor and adhere to the blades, causing scaling in the compressor's flow path. This leads to a decrease in the compressor's pressure ratio and efficiency, which in turn reduces the gas turbine's output and efficiency. The unit's operating line will also move closer to the surge boundary, increasing the risk of surge. Furthermore, the compressor blades can be corroded by salt buildup, affecting the unit's lifespan. Currently, conventional power plants are equipped with manual water washing modules. When power plant operators determine that the gas turbine needs water washing, they dispatch personnel to manually operate the water washing module on-site.

[0003] For example, patent application number CN202222893884.0 discloses a novel water washing system, including a water washing tank and a filter tank, a controller located on one side of the water washing tank, a connecting pipe connecting the bottom of the water washing tank and the top of the filter tank, a circulation pipe connecting the bottom of the filter tank and the top of the water washing tank, an arc-shaped filter plate horizontally arranged in the water washing tank, the arc-shaped filter plate dividing the water washing tank into a water washing chamber and a water collection chamber from top to bottom, a feed inlet and a water injection pipe located at the top of the water washing chamber, a stirring device located in the water washing chamber, a discharge sealing door located on one side of the water washing chamber, one end of the connecting pipe extending into the water collection chamber and connected to a slurry pump, a filter element horizontally arranged in the filter tank, the filter element dividing the filter tank into a filter chamber and a clean water chamber from top to bottom, and one end of the circulation pipe extending into the clean water chamber and connected to a circulation pump. To prevent excessive water pressure inside the washing tank, an overflow device is installed on the outside of the tank. The overflow device contains a spring valve plate, which controls the water flow based on the water pressure inside the tank. However, the spring valve plate is controlled by a spring, and the spring efficiency will decrease after long-term use, thus affecting the water flow from the tank. Summary of the Invention

[0004] To address the aforementioned problems, this utility model proposes a high-efficiency water washing control device for gas turbines, thereby overcoming the shortcomings of existing devices.

[0005] To achieve the purpose of this utility model, the utility model is implemented through the following technical solution: a gas turbine high-efficiency water washing control device, including a base plate, a water tank at the upper end of the base plate, a water pump group and a control cabinet on one side of the water tank, and the water tank and the water pump group are connected by a guide pipe network;

[0006] A protective box is installed on the back of the diversion pipe network. An overflow device is installed inside the protective box. The inlet end of the overflow device is connected to the overflow pipe located on the back of the water tank, and the outlet end of the overflow device is connected to the drain pipe. The overflow device is installed inside the protective box to prevent dust and provide a seal.

[0007] The overflow component includes a valve seat, which is fixedly connected to the inside of the protective box. An inlet and an outlet are provided on the outside of the valve seat. The inlet and outlet are connected to the valve cavity opened in the valve seat. A spring valve plate is slidably arranged in the valve cavity. An adjustment mechanism for adjusting the spring pressure of the spring valve plate is provided at the upper end of the valve seat.

[0008] A further improvement is that the outlet is positioned above the inlet.

[0009] A further improvement is that the overflow pipe is fixedly connected to the outside of the valve seat, the inlet is connected to the overflow pipe, the drain pipe is fixedly connected to the outside of the valve seat, and the drain pipe is connected to the outlet.

[0010] A further improvement is that the spring valve plate includes a lower valve core and a positioning post. The lower valve core is placed below the positioning post, and the lower valve core and the positioning post are slidably disposed in the valve cavity. A spring is fixedly connected between the positioning post and the lower valve core.

[0011] A further improvement is that the adjustment mechanism includes a control box, which is fixedly connected to the upper end of the valve seat. The control box contains a motor, a gear, and a toothed plate. The toothed plate is fixedly connected to the upper end of the positioning column. The upper and lower ends of the control box are provided with through slots that allow the toothed plate and the positioning column to slide. The motor is fixedly connected to the inside of the control box. The motor is fixedly connected to the gear, and the gear meshes with the toothed plate.

[0012] A further improvement is that the control box is equipped with a damping positioning mechanism to prevent the toothed plate from moving. The damping positioning mechanism includes a pneumatic push rod and a rubber pad. The pneumatic push rod is fixedly installed inside the control box and can apply a certain force to the toothed plate to limit its movement.

[0013] A further improvement is that the height of the rubber pad is flush with the height of the gear.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] Under the control of the water washing system, the water pump unit draws the washing liquid from the water tank, pressurizes it and delivers it to the water washing section of the gas turbine. When the liquid in the water tank passes through the overflow component, the spring valve plate in the valve seat will be pushed open by the water pressure. The inlet is connected to the outlet through the valve cavity. When the spring valve plate becomes loose due to long-term use, the spring pressure of the spring valve plate is adjusted by the adjustment mechanism to ensure that the overflow component can continue to be used and has a longer service life. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural diagram of the water tank in this utility model.

[0018] Figure 2 This is a structural diagram of the overflow component in this utility model.

[0019] Figure 3 This is a structural diagram of the valve seat inside the present invention.

[0020] Figure 4 This is a system diagram of the water washing control of this utility model.

[0021] The components are as follows: 1. Seat plate; 2. Water tank; 3. Water pump set; 4. Diversion pipe network; 5. Control cabinet; 6. Protective box; 7. Overflow pipe; 8. Drain pipe; 9. Overflow component; 10. Control box; 11. Valve seat; 12. Inlet; 13. Outlet; 14. Valve cavity; 15. Lower valve core; 16. Motor; 17. Gear; 18. Through groove; 19. Tooth plate; 20. Positioning column; 21. Starting push rod; 22. Rubber pad. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] according to Figure 1 , 2 As shown in Figures 3 and 4, this embodiment proposes a high-efficiency water washing control device for gas turbines, including a base plate 1, a water tank 2 at the upper end of the base plate 1, a water pump group 3 and a control cabinet 5 on one side of the water tank 2, and the water tank 2 and the water pump group 3 are connected by a guide pipe network 4.

[0024] The main body of the water washing control device is mounted on the base plate 1 as an independent module. The main equipment, water pump set 3 and water tank 2, are fixed on the base plate 1. Water tank 2 contains a manual stirrer to mix the demineralized water and cleaning agent evenly. A level gauge is installed in water tank 2 to display the water level. A drain ball valve is installed at a low position on the side of water tank 2. Two quick connectors are installed on the top of water tank 2 for adding demineralized water and cleaning agent. The control cabinet is mounted on the front of the water washing device, measuring 300×300×200mm. On the water pump set 3, two brackets are provided on the front and rear sides of the booster pump to hold the cables and hoses, respectively.

[0025] The capacity of water tank 2 needs to be determined based on the size of the gas turbine and the water washing requirements. The cleaning water is usually deionized water or an aqueous solution with added specific cleaning agents.

[0026] The washing solution is drawn from the water tank 2 by the water pump unit 3, pressurized, and then delivered to the washing section of the gas turbine. In addition to the water tank 2 and the water pump unit 3, the guide pipe network 4 is also equipped with filters and various valves. The filters remove impurities and particles from the washing solution, preventing them from entering the gas turbine and causing damage, thus ensuring the cleanliness of the washing solution. The valves control the switching and on / off of the water circuit; these valves are pneumatic or solenoid valves for intelligent control. For details on the intelligent washing control system of the washing control device, please refer to the following description.

[0027] The back of the diversion pipe network 4 is equipped with a protective box 6, and the protective box 6 is equipped with an overflow component 9. The input end of the overflow component 9 is connected to the overflow pipe 7 located on the back of the water tank 2, and the output end of the overflow component 9 is connected to the drain pipe 8. The overflow component 9 is installed inside the protective box 6 to play a role in dust prevention and sealing.

[0028] The overflow component 9 includes a valve seat 11, which is fixedly connected to the inside of the protective box 6. An inlet 12 and an outlet 13 are provided on the outside of the valve seat 11. The inlet 12 and the outlet 13 are connected to the valve cavity 14 opened in the valve seat 11. A spring valve plate is slidably arranged in the valve cavity 14. An adjustment mechanism for adjusting the spring pressure of the spring valve plate is provided at the upper end of the valve seat 11.

[0029] When the water pressure in water tank 2 is too high, the liquid in water tank 2 is discharged outward through overflow pipe 7. When passing through overflow component 9, the spring valve plate in valve seat 11 will be pushed open under the action of water pressure. Water inlet 12 is connected to water outlet 13 through valve cavity 14. Cleaning water is discharged from drain pipe 8 through water outlet 13. When the spring valve plate becomes loose due to long-term use, the spring pressure of the spring valve plate is adjusted by the adjustment mechanism to ensure that overflow component 9 can continue to be used and has a longer service life.

[0030] It is worth explaining in detail that the outlet 13 is located above the inlet 12.

[0031] In addition, the overflow pipe 7 is fixedly connected to the outside of the valve seat 11, the inlet 12 is connected to the overflow pipe 7, and the drain pipe 8 is fixedly connected to the outside of the valve seat 11, and the drain pipe 8 is connected to the outlet 13. The spring valve slides downward along the valve cavity 14, sealing the passage from the inlet 12 into the valve cavity 14. When the water pressure increases, the cleaning water will enter the inlet 12 through the overflow pipe 7 and push the spring valve. The spring valve slides upward along the valve cavity 14 until the passage between the spring valve and the outlet 13 opens, and the cleaning water is discharged from the drain pipe 8 through the outlet 13. When the water pressure drops, the spring valve will close the outlet 13 again.

[0032] Regarding spring valve plates:

[0033] The spring valve includes a lower valve core 15 and a positioning post 20. The lower valve core 15 is positioned below the positioning post 20. The lower valve core 15 and the positioning post 20 are slidably disposed within the valve cavity 14. A spring is fixedly connected between the positioning post 20 and the lower valve core 15. The spring valve is used in conjunction with an adjusting structure.

[0034] Specifically, the regulating mechanism includes a control box 10, which is fixedly connected to the upper end of the valve seat 11. The control box 10 contains a motor 16, a gear 17, and a gear plate 19. The gear plate 19 is fixedly connected to the upper end of the positioning post 20. The upper and lower ends of the control box 10 have through slots 18 that allow the gear plate 19 and positioning post 20 to slide. The motor 16 is fixedly connected inside the control box 10 and is fixedly connected to the gear 17, which meshes with the gear plate 19. The motor 16 controls the gear 17 to rotate, and as the gear 17 rotates, it meshes with the gear plate 19, causing the gear plate 19 to rise and fall. The positioning post 20 is fixed to the gear plate 19, and when the gear plate 19 moves, the positioning post 20 also moves accordingly. After the positioning post 20 falls, the spring between the positioning post 20 and the lower valve core 15 is compressed, and the spring pressure on the lower valve core 15 also increases.

[0035] There is a gap at the meshing point between gear 17 and toothed plate 19. To prevent toothed plate 19 from moving up and down, in a preferred embodiment, a damping positioning mechanism is provided inside the control box 10 to prevent toothed plate 19 from moving. The damping positioning mechanism includes a pneumatic push rod 21 and a rubber pad 22. The pneumatic push rod 21 is fixedly installed inside the control box 10 and can apply a certain force to toothed plate 19 to limit its movement. After toothed plate 19 is adjusted, the pneumatic push rod 21 will apply pressure to toothed plate 19 to limit its up and down movement.

[0036] It is worth explaining in detail that the height of the rubber pad 22 is flush with the height of the gear 17. In this way, when the pneumatic push rod 21 pushes the rubber pad 22 and the rubber pad 22 presses against the toothed plate 19, the gear 17 and the rubber pad 22 can apply pressure to the toothed plate 19 from both the left and right sides at the same time, ensuring that the force on both sides of the toothed plate 19 is uniform and the fastening effect is better.

[0037] Conventional power plants are equipped with manual water washing modules. When plant operators determine that the gas turbines require water washing, they dispatch personnel to manually operate the module on-site. The problem is that if the water washing cycle is too short, the performance recovery benefits are insufficient to cover the cost of the washing operation; if the cycle is too long, the unit's performance continues to deteriorate, significantly impacting operational economics. Therefore, a more refined intelligent cleaning alert algorithm is needed to balance the economic losses from power generation with the cost of water washing, optimize offline water washing cycles, and further improve the unit's operational efficiency.

[0038] Therefore, this type of water washing control device is also equipped with an intelligent water washing control system to realize unmanned operation of the water washing process. It automates the entire process from data acquisition and decision triggering to cleaning execution, reducing human operation steps and lowering the error rate.

[0039] The architecture of the intelligent water washing system includes:

[0040] 1. Establish a data acquisition layer connected to the power plant's SIS system, and collect gas turbine operating data (differential pressure, temperature, speed, load rate, etc.) and environmental parameters (salt concentration, humidity) in real time through the data interface to achieve real-time data exchange.

[0041] 2. Build an analysis and decision-making layer with a performance model that includes a performance degradation model and a performance model with gas turbine characteristics. Based on thermodynamic equations, correct unit performance, quantify the impact of scaling, determine the current pollution status of the unit, and calculate the optimal water washing cycle by combining electricity price, gas price, and water washing cost.

[0042] 3. Establish an execution control layer that enables automatic water washing. Through PLC control technology, the valves related to water washing are switched on and off to achieve fully automatic cleaning and reduce the human error rate.

[0043] 4. Build a web-based display interface to provide a visual interface and alarm prompts, so as to facilitate operation and monitoring by operators.

[0044] The main contents of the intelligent calculation technology for water washing cycle include:

[0045] 1. By automatically analyzing the main parameters of the gas turbine, the system determines the current level of contamination in the flow path and provides the most suitable operating recommendations, categorized into three types: no water washing required, water washing allowed, and immediate water washing.

[0046] 2. Utilizing advanced algorithms and models, such as machine learning enhancement and thermodynamic correction, after each water wash, the system records the actual efficiency recovery data and then optimizes the water wash cycle calculation algorithm in reverse.

[0047] 3. By comparing the performance improvement curves of the unit's maximum output capacity and full-load efficiency after water washing at various times, the optimal point of the comprehensive cost curve for water washing is found. Before the optimal point, the unit does not need water washing; when it is near the optimal point, the system will give a water washing suggestion; if it significantly exceeds the optimal point, and according to the unit performance evaluation analysis, if there is an operational risk, an immediate water washing suggestion will be given.

[0048] The water washing benefit analysis mainly includes:

[0049] 1. By embedding a window for manually inputting water washing operation costs, gas prices, and electricity prices, the system can quickly calculate the revenue data after water washing under the current operating conditions, thus meeting the needs of water washing benefit calculation under different operating conditions.

[0050] 2. A budget algorithm is used to predict the performance benefits of the unit after water washing. The output capacity improvement curve of the gas turbine after water washing is based on the performance analysis and calculation of the unit. If the unit is washed, the output capacity and full-load efficiency improvement that can be achieved under the current environmental conditions are displayed in the form of curves on the Web interface.

[0051] Unit performance monitoring and early warning

[0052] 1. Real-time display of gas turbine performance data and health status via a web interface, making it easier for operators to monitor the gas turbine's operating status and reducing the risk of unplanned unit outages.

[0053] 2. Utilize big data analytics and machine learning algorithms to identify abnormal changes in gas turbine performance and provide early warnings of potential pollution problems. For example, the system will automatically issue a warning signal when compressor efficiency continues to decline.

[0054] How this application works:

[0055] The washing solution is drawn from the water tank 2 by the water pump unit 3, pressurized, and then delivered to the washing section of the gas turbine. In addition to the water tank 2 and the water pump unit 3, a filter is installed on the guide pipe network 4. The filter removes impurities and particles from the washing solution, preventing them from entering the gas turbine and causing damage, thus ensuring the cleanliness of the washing solution. When the water pressure in the water tank 2 is too high, the liquid in the water tank 2 is discharged outward through the overflow pipe 7. When passing through the overflow component 9, the spring valve plate in the valve seat 11 is opened by the water pressure. The inlet 12 is connected to the outlet 13 through the valve chamber 14, and the washing water is discharged from the drain pipe 8 through the outlet 13. When the spring valve plate becomes loose due to prolonged use, the spring pressure of the spring valve plate is adjusted by the adjustment mechanism to ensure that the overflow component 9 continues to be used and has a longer service life.

[0056] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0057] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A control device for efficient water washing of a gas turbine, comprising a base plate (1), a water tank (2) provided at the upper end of the base plate (1), a water pump assembly (3) and a control cabinet (5) provided on one side of the water tank (2), the water tank (2) and the water pump assembly (3) being connected by a guide pipe network (4), characterized in that: The back of the diversion pipe network (4) is provided with a protective box (6), and the protective box (6) is provided with an overflow component (9). The input end of the overflow component (9) is connected to the overflow pipe (7) provided on the back of the water tank (2), and the output end of the overflow component (9) is connected to a drain pipe (8). The overflow component (9) includes a valve seat (11), which is fixedly connected to the inside of the protective box (6). The valve seat (11) has an inlet (12) and an outlet (13) on its outer side. The inlet (12) and the outlet (13) communicate with the valve cavity (14) opened in the valve seat (11). A spring valve plate is slidably arranged in the valve cavity (14). The upper end of the valve seat (11) is provided with an adjustment mechanism for adjusting the spring pressure of the spring valve plate.

2. The gas turbine high-efficiency water washing control device according to claim 1, characterized in that: The outlet (13) is positioned above the inlet (12).

3. The gas turbine high-efficiency water washing control device according to claim 1, characterized in that: The overflow pipe (7) is fixedly connected to the outside of the valve seat (11), the inlet (12) is connected to the overflow pipe (7), the drain pipe (8) is fixedly connected to the outside of the valve seat (11), and the drain pipe (8) is connected to the outlet (13).

4. The gas turbine high-efficiency water washing control device according to claim 2, characterized in that: The spring valve plate includes a lower valve core (15) and a positioning post (20). The lower valve core (15) is placed below the positioning post (20). The lower valve core (15) and the positioning post (20) are slidably disposed in the valve cavity (14). A spring is fixedly connected between the positioning post (20) and the lower valve core (15).

5. The gas turbine high-efficiency water washing control device according to claim 4, characterized in that: The regulating mechanism includes a control box (10), which is fixedly connected to the upper end of the valve seat (11). The control box (10) is equipped with a motor (16), a gear (17) and a toothed plate (19). The toothed plate (19) is fixedly connected to the upper end of the positioning column (20). The upper and lower ends of the control box (10) are provided with through grooves (18) that allow the toothed plate (19) and the positioning column (20) to slide. The motor (16) is fixedly connected to the inside of the control box (10). The motor (16) is fixedly connected to the gear (17), and the gear (17) meshes with the toothed plate (19).

6. The gas turbine high-efficiency water washing control device according to claim 5, characterized in that: The control box (10) is provided with a damping positioning mechanism inside to prevent the toothed plate (19) from moving. The damping positioning mechanism includes a pneumatic push rod (21) and a rubber pad (22). The pneumatic push rod (21) is fixedly installed inside the control box (10). The pneumatic push rod (21) can apply a certain action to the toothed plate (19) to limit its movement.

7. The gas turbine high-efficiency water washing control device according to claim 6, characterized in that: The height of the rubber pad (22) is flush with the height of the gear (17).

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