An external air intake water spray atomizing cooling device for gas turbine

Abstract

The application relates to the field of gas turbines, in particular to an external water injection atomization cooling device for a gas turbine, which comprises an air inlet filtering device, high-pressure water injection atomization nozzles and a high-pressure water pump, and further comprises an external water injection atomization cooling support, a water collecting tank and a high-pressure water pump pry; the external water injection atomization cooling support is fixedly provided with a matrix type high-pressure water injection atomization nozzle support; the high-pressure water injection atomization nozzles are fixedly installed on the matrix type high-pressure water injection atomization nozzle support in a matrix type; and the bottom of the external water injection atomization cooling support is provided with a bottom support and symmetrically distributed with side fixed supports. The application can effectively avoid liquid drop abrasion of compressor blades caused by air inlet water injection cooling, reduce the requirement of the air inlet water injection atomization cooling device on water quality, reduce the non-recyclable waste of water sources in the water injection process and shorten the reconstruction period of the air inlet cooling device.

Description

Technical Field

[0001] This invention relates to the field of gas turbines, and more specifically to an external intake water spray atomization cooling device for gas turbines. Background Technology

[0002] A gas turbine is a rotary impeller-type thermal engine that uses a continuously flowing gas as a working fluid to drive a high-speed rotating impeller, converting the chemical energy of fuel into mechanical energy. With its characteristics of fast start-up speed, high power density, low pollutant emissions, and excellent peak-shaving performance, it is widely used in many fields such as grid peak-shaving power generation, natural gas distributed energy, marine power, and industrial drive, and is one of the core equipment in the energy and power field.

[0003] Currently, conventional gas turbine inlet water atomization cooling devices typically place high-pressure water atomizing nozzles in a sealed inlet filter chamber at the rear of the gas turbine inlet filter element and the front of the inlet volute. While this layout achieves inlet air cooling, it easily causes droplet erosion of the gas turbine compressor blades, posing a serious operational safety hazard. Solid impurities and ions in the cooling water can directly enter the gas turbine with the inlet air, not only exacerbating blade erosion and wear but also causing scale buildup on the blade surface, damaging blade aerodynamic performance, and even corroding precision internal components. Therefore, existing technologies impose extremely high requirements on cooling water quality, necessitating the use of demineralized water, softened water, or other high-purity water as the cooling water source, requiring the construction of complex high-purity water treatment systems. This significantly increases the initial investment and long-term operating costs of the device, limiting its widespread application in various scenarios. Furthermore, the extremely stringent requirements for cooling water quality result in high system setup and operating costs. Summary of the Invention

[0004] This invention addresses the technical problems existing in the prior art by providing an external intake water spray atomization cooling device for gas turbines.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: An external intake water spray atomizing cooling device for a gas turbine, including an intake filter, a high-pressure water spray atomizing nozzle, a high-pressure water pump, and also including an external water spray atomizing cooling bracket, a water collection tank, and a high-pressure water pump skid; The external water spray atomizing cooling bracket is fixedly equipped with a matrix-type high-pressure water spray atomizing nozzle support frame. The high-pressure water spray atomizing nozzles are fixedly installed on the matrix-type high-pressure water spray atomizing nozzle support frame in a matrix manner. The bottom of the external water spray atomizing cooling bracket is provided with a bottom support frame and the side fixed support frames are symmetrically distributed on the left and right sides. The top of the external water spray atomizing cooling bracket is installed with a top support frame. The external water spray atomizing cooling bracket is detachably and fixedly installed at the front end of the air inlet of the air intake filter device through the bottom support frame, the side fixed support frames, and the top support frame. The internal cavity of the air intake filtration device is arranged along the airflow direction, and from front to back, it contains an air-water separator, an air intake filter element, and a temperature and humidity meter. The high-pressure water pump is integrated and installed inside the high-pressure water pump skid. The high-pressure water pump skid also contains a filter, a flow meter, a regulating valve group, a check valve, a solenoid valve, and a pressure sensor, which are connected in series with the high-pressure water pump via pipelines. The outlet of the high-pressure water pump skid is connected to the inlet of the high-pressure water atomizing nozzle via a high-pressure water spray pipeline. A high-pressure water atomizing nozzle shut-off solenoid valve is installed in series on the high-pressure water spray pipeline. The air cooled by the atomization of water sprayed by the high-pressure water atomizing nozzle flows through the air-water separator and the air intake filter element in the air intake filtration device to complete air-water separation and filtration purification before finally being sent into the gas turbine intake volute.

[0006] In a preferred embodiment, the water collection tank is arranged directly below the external water spray atomizing cooling bracket, and the bottom outlet of the water collection tank is connected to an external water treatment system through a drainage pipe, on which a manual shut-off valve is installed in series.

[0007] In a preferred embodiment, the following settings are also included: The air cooled by the high-pressure water atomizing nozzle first flows through the air-water separator at the front end of the air intake filter to complete air-water separation, removing large droplets from the air, and then enters the air intake filter section for filtration and purification.

[0008] In a preferred embodiment, the following settings are also included: The water atomization process of the high-pressure water spray nozzle, as well as the heat exchange and cooling process between the atomized cooling water and the gas turbine intake air, are all completed before the air enters the intake filter. The entire process of water atomization and heat exchange and cooling is completed before the air enters the intake filter. The cooled humid air first passes through a gas-water separator to separate and remove large droplets before entering the intake filter element for filtration and purification. This separation-then-filtration process avoids large droplets wetting the intake filter element, preventing clogging and filtration failure, and further enhances the protection of the gas turbine blades. Because impurities in the cooling water are doubly intercepted by the subsequent gas-water separator and intake filter element, they will not enter the gas turbine with the intake air.

[0009] In a preferred embodiment, the housing of the high-pressure water pump skid is provided with an instrument air port, which is connected to the inlet pipe of the high-pressure water pump. This instrument air port is used to purge the high-pressure water pump and the connected pipe with instrument air when the high-pressure water pump is not in use for a long time, so as to prevent corrosion of the pump body and the inside of the pipe.

[0010] In a preferred embodiment, the external water spray atomizing cooling bracket is fixedly connected to the front end housing of the air inlet of the air intake filter device by bolts through a bottom support frame, a side fixed support frame, a top support frame, and a bolt-type detachable connection, which can realize the overall quick assembly, disassembly and maintenance of the bracket.

[0011] In a preferred embodiment, in order to achieve multi-port integration of the high-pressure water pump skid and realize water inlet, water return, water drainage, and high-pressure water supply, the shell of the high-pressure water pump skid is also provided with a water inlet, a water return, a water drain and a high-pressure water spray pipe outlet. The water inlet is connected to the water inlet pipe of the high-pressure water pump, the water return is connected to the water return pipe of the high-pressure water supply passage inside the high-pressure water pump skid, the water drain is connected to the internal venting pipe of the high-pressure water pump skid, and the high-pressure water spray pipe outlet is sealed and fixedly connected to the water inlet of the high-pressure water spray pipe.

[0012] In a preferred embodiment, the top opening of the water collection tank completely covers the area directly below the spraying area of ​​the high-pressure water atomizing nozzle, and is used to receive all the cooling water that condenses and drips during the water atomization process. The temperature and humidity meter is fixedly installed at the front end of the air outlet of the air intake filter device and downstream of the air intake filter element, and is used to monitor the temperature and humidity parameters of the air to be cooled and purified before entering the gas turbine in real time.

[0013] It should be noted that the temperature and humidity meter is designed to be positioned downstream of the air intake filter and at the front of the air outlet of the air intake filter, so as to obtain the real temperature and humidity parameters of the cooled air that is about to enter the gas turbine.

[0014] In a preferred embodiment, the outlet end of the high-pressure water spray pipeline is sealed and connected to the inlet of each of the matrix-arranged high-pressure water spray atomizing nozzles. The high-pressure water spray atomizing nozzle shut-off solenoid valve is installed in series on the main pipeline of the high-pressure water spray pipeline to synchronously control the start and stop of the water spraying of all high-pressure water spray atomizing nozzles.

[0015] In a preferred embodiment, the condensate collected in the water collection tank is transported to an external water treatment system via a drainage pipeline for treatment, and then flows back to the high-pressure water pump skid.

[0016] The beneficial effects of this invention are: it can effectively avoid the droplet erosion of compressor blades caused by intake water spray cooling, reduce the water quality requirements of the intake water spray atomizing cooling device, reduce the non-recyclable waste of water during the water spraying process, shorten the renovation period of adding the intake cooling device, and ensure the long-term energy-saving, environmentally friendly, safe, stable and economical operation of the gas turbine intake water spray atomizing cooling device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the external air intake water spray atomizing cooling bracket structure of the present invention; Figure 3 This is a schematic diagram of the high-pressure water pump skid and matrix-type high-pressure water spray atomizing nozzle structure of the present invention.

[0018] In the diagram: 1. External water spray atomizing cooling bracket; 2. High-pressure water spray atomizing nozzle; 3. Water collection tank; 4. Air intake filter; 5. Thermometer and hygrometer; 6. High-pressure water pump skid; 7. High-pressure water spray atomizing nozzle shut-off solenoid valve; 8. High-pressure water spray pipeline; 9. Drainage pipeline; 10. Manual shut-off valve; 11. Water inlet; 12. Water return outlet; 13. Drain outlet; 14. Instrument air inlet; 15. High-pressure water spray pipeline outlet; 16. Matrix-type high-pressure water spray atomizing nozzle support frame; 17. Bottom support frame; 18. Side fixed support frame; 19. Top support frame. Detailed Implementation

[0019] 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, and 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.

[0020] As attached Figure 1 - Appendix Figure 3 As shown, this embodiment provides: an external intake water spray atomizing cooling device for a gas turbine, including an intake filter 4, a high-pressure water spray atomizing nozzle 2, a high-pressure water pump, and also an external water spray atomizing cooling bracket 1, a water collection tank 3, and a high-pressure water pump skid 6. An external water spray atomizing cooling bracket 1 is fixedly equipped with a matrix-type high-pressure water spray atomizing nozzle support frame 16. The high-pressure water spray atomizing nozzles 2 are fixedly installed on the matrix-type high-pressure water spray atomizing nozzle support frame 16 in a matrix manner. The bottom of the external water spray atomizing cooling bracket 1 is provided with a bottom support frame 17 and the side fixed support frames 18 are symmetrically distributed on the left and right sides. The top of the external water spray atomizing cooling bracket 1 is installed with a top support frame 19. The external water spray atomizing cooling bracket 1 is detachably and fixedly installed at the front end of the air inlet of the air intake filter device 4 through the bottom support frame 17, the side fixed support frames 18, and the top support frame 19. The internal cavity of the intake air filter device 4 is arranged along the air flow direction, and from front to back, it contains an air-water separator, an intake air filter element, and a temperature and humidity meter 5. The high-pressure water pump is integrated and installed inside the high-pressure water pump skid 6. The high-pressure water pump skid 6 is also equipped with a filter, a flow meter, a regulating valve group, a check valve, a solenoid valve, and a pressure sensor that are connected in series with the high-pressure water pump via pipelines. The outlet of the high-pressure water pump skid 6 is connected to the inlet of the high-pressure water atomizing nozzle 2 via a high-pressure water spray pipeline 8. A high-pressure water atomizing nozzle shut-off solenoid valve 7 is installed in series on the high-pressure water spray pipeline 8. The air cooled by the water atomization of the high-pressure water atomizing nozzle 2 flows through the air-water separator and the intake air filter element in the intake air filter device 4 to complete the air-water separation and filtration purification before finally being sent into the gas turbine intake volute.

[0021] This application utilizes the structural design of an external water spray atomizing cooling bracket 1 to achieve a matrix-style uniform arrangement of high-pressure water spray atomizing nozzles 2 using a matrix-style high-pressure water spray atomizing nozzle support frame 16. This ensures that the atomizing cooling range completely covers the entire cross-section of the gas turbine intake. Simultaneously, through a multi-dimensional support structure consisting of a bottom support frame 17, a side fixed support frame 18, and a top support frame 19, the bracket is detachably fixed to the front end of the intake port of the intake filter device 4. This eliminates the need to modify the internal sealed structure of the original gas turbine intake filter chamber, thus structurally realizing an external layout for the atomizing cooling unit.

[0022] Furthermore, an intake air treatment system was constructed that integrates pre-atomization cooling, gas-water separation and de-drip, precision filtration and purification, and real-time parameter monitoring. This system ensures that the atomized and cooled air must undergo dual interception and purification before entering the gas turbine intake volute. This extends the distance between the atomization cooling position and the gas turbine compressor, solving the technical problem in existing built-in solutions where the nozzle is too close to the intake volute, causing large droplets to directly enter the gas turbine with the intake air and resulting in droplet erosion of the compressor blades.

[0023] Furthermore, in some other specific embodiments, the integrated design of the high-pressure water pump skid 6 is used to form a closed-loop controllable high-pressure water supply and atomization control. The filter pre-treats the incoming water to protect the water pump and nozzle from clogging. The flow meter, regulating valve group, and pressure sensor regulate the water spray pressure and flow. The check valve and solenoid valve protect the water circuit, and finally the start and stop control is realized by the shut-off solenoid valve.

[0024] The water collection tank 3 is located directly below the external water spray atomizing cooling bracket 1. The bottom outlet of the water collection tank 3 is connected to the external water treatment system through the drainage pipe 9. A manual shut-off valve 10 is installed in series on the drainage pipe 9.

[0025] The above-mentioned application discloses the arrangement structure of the water collection tank 3 and the drainage link design. The reason for this is that, through an open receiving structure, the water collection tank 3 is arranged directly below the external water spray atomizing cooling bracket 1, and the top opening completely covers the entire spray area of ​​the high-pressure water spray atomizing nozzle 2. This allows it to collect all the cooling water that condenses and drips during the atomization heat exchange process, alleviating the situation where the nozzles are arranged in a closed filter chamber and the condensate cannot be effectively collected, resulting in a large waste of water resources. Furthermore, in conjunction with the manual shut-off valve 10 on the drainage pipe 9, the discharge of condensate can be flexibly controlled.

[0026] The following settings are also included: The air cooled by the water atomization of the high-pressure water spray nozzle 2 first flows through the air-water separator at the front end of the air intake filter device 4 to complete the air-water separation, remove large droplets in the air, and then enter the air intake filter element section for filtration and purification.

[0027] The following settings are also included: The water atomization process of the high-pressure water atomizing nozzle 2, as well as the heat exchange and cooling process between the atomized cooling water and the gas turbine intake air, are all completed before the air enters the intake filter device 4.

[0028] Specifically, the entire process of water atomization and heat exchange cooling in this application is completed before the air enters the intake filter device 4. The cooled humid air first passes through the air-water separator to separate and remove large droplets, and then enters the intake filter element for filtration and purification. The process of separation before filtration avoids large droplets from wetting the intake filter element and causing filter blockage and filtration failure, further enhancing the protection effect on the gas turbine blades. Since impurities in the cooling water will be intercepted by the subsequent air-water separator and the intake filter element, they will not enter the gas turbine with the intake air.

[0029] The high-pressure water pump skid 6 has an instrument air port 14 on its housing. The instrument air port 14 is connected to the inlet pipe of the high-pressure water pump. It is used to purge the high-pressure water pump and the connected pipe with instrument air when the high-pressure water pump is not used for a long time, so as to prevent the pump body and the inside of the pipe from rusting.

[0030] The external water spray atomizing cooling bracket 1 is fixedly connected to the front end housing of the air inlet of the air intake filter device 4 by bolts through the bottom support frame 17, the side fixed support frame 18, and the top support frame 19, which can realize the overall quick disassembly and maintenance of the bracket.

[0031] In order to achieve multi-port integration of the high-pressure water pump skid 6 and realize water inlet, water return, water drainage, and high-pressure water supply, the shell of the high-pressure water pump skid 6 is also provided with a water inlet 11, a water return 12, a water drain 13, and a high-pressure water spray pipe outlet 15. The water inlet 11 is connected to the water inlet pipe of the high-pressure water pump, the water return 12 is connected to the water return pipe of the high-pressure water supply passage inside the high-pressure water pump skid 6, the water drain 13 is connected to the internal venting pipe of the high-pressure water pump skid 6, and the high-pressure water spray pipe outlet 15 is sealed and fixedly connected to the water inlet of the high-pressure water spray pipe 8.

[0032] The top opening of the water collection tank 3 completely covers the area directly below the spray area of ​​the high-pressure water atomizing nozzle 2, and is used to collect all the cooling water that condenses and drips during the water atomization process. The temperature and humidity meter 5 is fixedly installed at the front end of the air outlet of the air intake filter device 4 and downstream of the air intake filter element, and is used to monitor the temperature and humidity parameters of the air to be cooled and purified before entering the gas turbine in real time.

[0033] It should be noted that the installation position of the temperature and humidity meter 5 is designed so that the monitoring point is set on the downstream side of the air intake filter element and in front of the air outlet of the air intake filter device 4, so as to obtain the real temperature and humidity parameters of the cooled air that is about to enter the gas turbine.

[0034] The outlet of the high-pressure water spray pipeline 8 is sealed and connected to the inlet of each of the matrix-arranged high-pressure water spray atomizing nozzles 2. The high-pressure water spray atomizing nozzle shut-off solenoid valve 7 is installed in series on the main pipeline of the high-pressure water spray pipeline 8 to synchronously control the water spray start and stop actions of all high-pressure water spray atomizing nozzles 2.

[0035] The condensate collected in the water collection tank 3 is transported to the external water treatment system via the drainage pipe 9 for treatment, and then flows back to the high-pressure water pump skid 6.

[0036] In summary, this invention provides an external intake water atomization cooling device for gas turbines that features high operational safety, readily available water quality, energy efficiency, environmental friendliness, good economy, and convenient installation and maintenance. Air cooled by high-pressure water atomization enters the intake filter 4 via an air-water separator. The water atomization and heat exchange with the air are completed before the air enters the intake filter 4. Part of the water sprayed from the high-pressure water atomization nozzle 2 condenses and flows into the water collection tank 3, then through the drainage pipe 9 to the water treatment system for reuse. Simultaneously, the external water atomization cooling device reduces the requirements for water quality. The external water atomization cooling bracket 1 is easily disassembled and installed for maintenance, effectively shortening the retrofitting period for adding intake cooling.

Claims

1. An external intake water atomizing cooling device for a gas turbine, comprising an intake filter (4), a high-pressure water atomizing nozzle (2), and a high-pressure water pump, characterized in that, It also includes an external water spray atomizing cooling bracket (1), a water collection tank (3), and a high-pressure water pump skid (6). The external water spray atomizing cooling bracket (1) is fixedly provided with a matrix-type high-pressure water spray atomizing nozzle support frame (16). The high-pressure water spray atomizing nozzle (2) is fixedly installed on the matrix-type high-pressure water spray atomizing nozzle support frame (16) in a matrix. The bottom of the external water spray atomizing cooling bracket (1) is provided with a bottom support frame (17) and the side fixed support frames (18) are symmetrically distributed on the left and right. The top of the external water spray atomizing cooling bracket (1) is installed with a top support frame (19). The external water spray atomizing cooling bracket (1) is detachably fixedly installed at the front end of the air inlet of the air intake filter device (4) through the bottom support frame (17), the side fixed support frame (18), and the top support frame (19). The internal cavity of the air intake filter (4) is arranged along the air flow direction, and from front to back, there is a gas-water separator, an air intake filter element, and a thermometer and hygrometer (5). The high-pressure water pump is integrated and installed inside the high-pressure water pump skid (6). The high-pressure water pump skid (6) is also equipped with a filter, a flow meter, a regulating valve group, a check valve, a solenoid valve, and a pressure sensor that are connected in series with the high-pressure water pump through a pipeline. The outlet of the high-pressure water pump skid (6) and the inlet of the high-pressure water atomizing nozzle (2) are connected through a high-pressure water spray pipeline (8). A high-pressure water atomizing nozzle shut-off solenoid valve (7) is installed in series on the high-pressure water spray pipeline (8). The air cooled by the water atomization of the high-pressure water atomizing nozzle (2) flows through the gas-water separator and the air intake filter element in the air intake filter (4) in sequence to complete the gas-water separation and filtration purification, and is finally sent into the gas turbine intake volute.

2. The external intake water spray atomizing cooling device for a gas turbine according to claim 1, characterized in that, The water collection tank (3) is located directly below the external water spray atomizing cooling bracket (1). The bottom outlet of the water collection tank (3) is connected to the external water treatment system through the drainage pipe (9). A manual shut-off valve (10) is installed in series on the drainage pipe (9).

3. An external intake water spray atomizing cooling device for a gas turbine according to claim 2, characterized in that, The following settings are also included: The air cooled by the high-pressure water atomizing nozzle (2) first flows through the air-water separator at the front end of the air intake filter (4) to complete the air-water separation, remove large droplets in the air, and then enter the air intake filter section for filtration and purification.

4. An external intake water spray atomizing cooling device for a gas turbine according to claim 3, characterized in that, The following settings are also included: The water atomization process of the high-pressure water atomizing nozzle (2) and the heat exchange and cooling process between the atomized cooling water and the gas turbine intake air are both completed before the air enters the intake filter device (4).

5. An external intake water spray atomizing cooling device for a gas turbine according to claim 4, characterized in that, The high-pressure water pump skid (6) has an instrument air port (14) on its housing, which is connected to the inlet pipe of the high-pressure water pump.

6. An external intake water spray atomizing cooling device for a gas turbine according to claim 1, characterized in that, The external water spray atomizing cooling bracket (1) is fixedly connected to the front end housing of the air inlet of the air intake filter device (4) by bolts through the bottom support frame (17), the side fixed support frame (18), the top support frame (19).

7. An external intake water spray atomizing cooling device for a gas turbine according to claim 1, characterized in that, The high-pressure water pump skid (6) is also provided with an inlet (11), a return water inlet (12), a drain outlet (13) and a high-pressure water spray pipe outlet (15). The inlet (11) is connected to the inlet pipe of the high-pressure water pump. The return water inlet (12) is connected to the return water pipe of the high-pressure water supply passage inside the high-pressure water pump skid (6). The drain outlet (13) is connected to the internal discharge pipe of the high-pressure water pump skid (6). The high-pressure water spray pipe outlet (15) is sealed and fixedly connected to the inlet of the high-pressure water spray pipe (8).

8. An external intake water spray atomizing cooling device for a gas turbine according to claim 1, characterized in that, The top opening of the water collection tank (3) completely covers the area directly below the water spraying area of ​​the high-pressure water atomizing nozzle (2), and the temperature and humidity meter (5) is fixedly installed at the front end of the air outlet of the air intake filter device (4) and downstream of the air intake filter element.

9. An external intake water spray atomizing cooling device for a gas turbine according to claim 1, characterized in that, The outlet of the high-pressure water spray pipeline (8) is sealed and connected to the inlet of each high-pressure water spray atomizing nozzle (2) arranged in a matrix. The high-pressure water spray atomizing nozzle shut-off solenoid valve (7) is installed in series on the main pipeline of the high-pressure water spray pipeline (8) to synchronously control the water spray start and stop actions of all high-pressure water spray atomizing nozzles (2).

10. An external intake water spray atomizing cooling device for a gas turbine according to claim 1, characterized in that, The condensate collected in the water collection tank (3) is transported to the external water treatment system via the drainage pipe (9) for treatment, and then flows back into the high-pressure water pump skid (6).

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