An external air intake water spray atomizing cooling system and cooling method for a gas turbine

Abstract

This invention relates to the field of gas turbines, specifically to an external inlet water atomization cooling system and method for gas turbines. The system includes an external water atomization cooling device located at the inlet front of the inlet filter. The external water atomization cooling device comprises a support frame and a matrix-type high-pressure water atomization nozzle support frame. The support frame is constructed by fixedly connecting a bottom support frame, side fixed support frames, and a top support frame. By installing the external water atomization cooling device before the inlet filter chamber, this invention allows the water atomization process to be completed before the filter chamber. Furthermore, the pressure and flow rate of the inlet and return water pipelines and the high-pressure water spray pipeline system can be stabilized through a high-pressure water pump discharge solenoid valve, regulating valve group, inlet flow meter, return flow meter, and inlet pressure sensor, ensuring the long-term energy-saving, environmentally friendly, safe, stable, and economical operation of the gas turbine inlet water atomization cooling system.

Description

Technical Field

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

[0002] Gas turbine power and efficiency are greatly affected by ambient temperature. As the ambient temperature rises, the gas turbine inlet temperature also increases, which will reduce the power and efficiency of the gas turbine. For gas turbine applications in general natural gas distributed energy, especially during the high-temperature summer season, there will be a peak electricity demand period. The high temperature environment in summer limits the power of the gas turbine, thereby significantly reducing the unit's peak-shaving capacity.

[0003] During hot summer weather, to improve the power and efficiency of gas turbines and enhance the economic efficiency and peak-shaving capacity of the unit, intake air cooling can be adopted. Intake water atomization cooling is an effective method. Conventional intake water atomization nozzles are placed after the gas turbine intake filter element. While this effectively reduces the intake air temperature, it also increases air humidity. Furthermore, the close proximity of the water atomization nozzle to the gas turbine intake volute increases the possibility of large droplets eroding the compressor blades. Additionally, because the water spraying area is in a confined space, water condensed and dripping to the bottom of the intake filter chamber during atomization is difficult to recover. This would otherwise result in a significant waste of water resources. However, by completing the water atomization process before the intake filter chamber, which is relatively far from the gas turbine intake volute, the air cooled by the water atomization will be intercepted by both the air-water separator and the intake filter element. This method can reduce the abrasion of large droplets on the compressor blades. Furthermore, the water condensed and dripping after water atomization is easier to recover and reuse, and it is also more convenient for on-site disassembly, installation, and maintenance. This can effectively shorten the modification period for adding an intake cooling device and ensure the long-term energy-saving, environmentally friendly, safe, stable, and economical operation of the gas turbine intake water atomization cooling system.

[0004] Currently, existing technologies have conducted some research on gas turbine inlet water spray atomization cooling systems, but these mainly focus on numerical simulation of the gas turbine inlet water spray atomization heat exchange process and characteristic research on the impact of the inlet water spray atomization cooling system on gas turbine performance. No external inlet water spray atomization cooling system for gas turbines has yet been developed. Summary of the Invention

[0005] This invention addresses the technical problems existing in the prior art by providing an external intake water spray atomization cooling system and cooling method for gas turbines.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: An external intake water spray atomization cooling system for a gas turbine includes an external water spray atomization cooling device. The external water spray atomization cooling device is distributed at the front end of the intake of the intake filter device so that the water spray atomization and heat exchange with the air are completed before the air enters the intake filter device. The external water spray atomization cooling device includes a supporting frame and a matrix high-pressure water spray atomization nozzle support frame. The supporting frame is formed by fixed splicing of a bottom support frame, a side fixed support frame, and a top support frame. The matrix high-pressure water spray atomization nozzle support frame is fixedly installed inside the supporting frame, and high-pressure water spray atomization nozzles arranged in a matrix are fixedly installed on the matrix high-pressure water spray atomization nozzle support frame. A water collection tank is fixedly installed directly below the external water spray atomizing cooling device, and the outlet of the water collection tank is connected to the water treatment system through a drainage pipe. The air intake filtration device is fixedly installed from front to back along the air flow direction, consisting of an air-water separator, an air intake filter element, and a thermometer and hygrometer. The air-water separator is directly opposite the air outlet of the external water spray atomizing cooling device, and the air outlet of the air intake filtration device is connected to the gas turbine air intake volute. The external water spray atomizing cooling device has a high-pressure water pump skid distributed on its side. The high-pressure water pump skid is equipped with an inlet main pipeline, two backup high-pressure water supply branches, a high-pressure water supply main pipeline, and a return water pipeline.

[0007] In a preferred embodiment, the main water inlet pipeline is sequentially equipped with a manual shut-off valve, an inlet pressure detection component, and a filter along the water flow direction. The inlet ends of both high-pressure water supply branches are connected to the outlet of the filter. Each high-pressure water supply branch is sequentially equipped with a high-pressure water pump, a regulating valve group, a check valve, and a water pump outlet pressure sensor along the water flow direction. Each high-pressure water supply branch is also equipped with a discharge solenoid valve between the regulating valve group and the check valve.

[0008] In a preferred embodiment, the outlets of the two high-pressure water supply branches converge into the high-pressure water supply main pipe. The high-pressure water supply main pipe is sequentially equipped with an inlet flow meter and a high-pressure water spray atomizing nozzle shut-off solenoid valve along the water flow direction. The outlet of the high-pressure water spray atomizing nozzle shut-off solenoid valve is connected to the inlet of each high-pressure water spray atomizing nozzle through a high-pressure water spray pipeline. The inlet of the return water pipeline is connected to the high-pressure water supply main pipe downstream of the inlet flow meter. The return water pipeline is equipped with a return water flow meter. The outlet of the return water pipeline is connected to the inlet main pipe upstream of the filter, forming a closed-loop return water pressure stabilization circuit.

[0009] In a preferred embodiment, the inlet pressure detection component includes an inlet pressure gauge and an inlet pressure sensor connected in parallel, both of which are connected to the main inlet pipeline between the manual shut-off valve and the filter.

[0010] In a preferred embodiment, the two high-pressure water supply branches include a first high-pressure water supply branch and a second high-pressure water supply branch. The first high-pressure water supply branch is provided with a high-pressure water pump A, a regulating valve group A, a high-pressure water pump check valve A, and a high-pressure water pump outlet pressure sensor A in sequence along the water flow direction. A high-pressure water pump discharge solenoid valve A is provided as a branch between the regulating valve group A and the high-pressure water pump check valve A.

[0011] In a preferred embodiment, the second high-pressure water supply branch is provided with a high-pressure water pump B, a regulating valve group B, a high-pressure water pump check valve B, and a high-pressure water pump outlet pressure sensor B in sequence along the water flow direction. A high-pressure water pump discharge solenoid valve B is provided between the regulating valve group B and the high-pressure water pump check valve B in the second high-pressure water supply branch.

[0012] In a preferred embodiment, in order to solve the corrosion problem caused by long-term shutdown of the high-pressure water pump, the inlet pipes of both high-pressure water pump A and high-pressure water pump B are provided with instrument air purging interfaces. The instrument air purging interfaces are used to connect instrument air to purge the pump body and the corresponding pipes.

[0013] In a preferred embodiment, the top opening of the water collection tank completely covers the vertical projection area of ​​the external water spray atomizing cooling device, and is used to collect the cooling water dripping after atomization and condensation.

[0014] In practice, the cooling water after atomization and condensation, whether dripping from the high-pressure water spray atomizing nozzle or flowing down from the frame and pipe walls of the external water spray atomizing cooling device, all drip within the vertical projection area of ​​the device; the opening of the water collection tank completely covers this area, ensuring that all the condensed water falls into the water collection tank without splashing or leakage.

[0015] The present invention also provides a method for external intake water atomization cooling of a gas turbine, the method comprising: S1. Temperature detection and start-up control: When the temperature and humidity meter detects that the air intake temperature is higher than the preset threshold, the valve on the high-pressure water spray pipeline is opened, the high-pressure water pump is started, and the water spray pressure and flow rate are adjusted through the corresponding regulating valve group. S2, Flow Upgrade Control: When the temperature and humidity meter detects that the intake air temperature has not dropped to the target value, another high-pressure water pump is started; S3. Condensate recovery: After the cooling water sprayed from the high-pressure water atomizing nozzle is atomized and heat exchanged, some of the condensate drips into the water collection tank and flows into the water treatment system through the drainage pipe for recycling. S4. Fault-based pressure stabilization control: When the high-pressure water spray atomizing nozzle is blocked or damaged and / or any high-pressure water pump fails, the pressure and flow of the inlet and return water pipelines and the high-pressure water spray pipeline are adjusted and stabilized through the high-pressure water pump discharge solenoid valve, regulating valve group, inlet flow meter, return flow meter, and inlet pressure sensor to ensure continuous system operation.

[0016] In a preferred embodiment, the method further includes: when any high-pressure water pump is stopped, introducing instrument air through the instrument air purging interface of the high-pressure water pump inlet pipeline to purge the high-pressure water pump and the corresponding pipeline.

[0017] The beneficial effects of this invention are as follows: By installing an external water spray atomizing cooling device before the intake filter chamber, the water spray atomization process is completed before the intake filter chamber. The two layers of interception—the gas-water separator and the intake filter element—reduce the abrasion of large droplets on the compressor blades. Furthermore, the condensed water after atomization is easier to recover and reuse, and it also facilitates on-site disassembly, installation, and maintenance. The pressure and flow rate of the inlet and outlet water pipelines and the high-pressure water spray pipeline system are stabilized by adjusting the high-pressure water pump discharge solenoid valve, regulating valve group, inlet flow meter, return flow meter, and inlet pressure sensor, ensuring the long-term energy-saving, environmentally friendly, safe, stable, and economical operation of the gas turbine intake water spray atomizing cooling system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of an external water spray atomizing cooling device.

[0019] In the diagram: 1. External water spray atomizing cooling device; 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. Inlet water pressure gauge; 12. Inlet water pressure sensor; 13. Inlet water flow meter; 14. Return water flow meter; 15. High-pressure water pump A; 16. High-pressure water pump B; 17. Control valve group A; 18. Control valve group B; 19. High-pressure water pump discharge solenoid valve A; 20. High-pressure water pump outlet pressure sensor A; 21. High-pressure water pump discharge solenoid valve B; 22. High-pressure water pump check valve A; 23. High-pressure water pump check valve B; 24. High-pressure water pump outlet pressure sensor B; 25. Filter; 26. Matrix high-pressure water spray atomizing nozzle support frame; 27. Bottom support frame; 28. Side fixed support frame; 29. ​​Top support frame. Detailed Implementation

[0020] 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.

[0021] As attached Figure 1-2 As shown, this embodiment provides: an external intake water atomization cooling system for a gas turbine, including an external water atomization cooling device 1. The external water atomization cooling device 1 is distributed at the intake front end of the intake filter device 4 so that the water atomization and heat exchange with air are completed before the air enters the intake filter device 4. The external water atomization cooling device 1 includes a support frame and a matrix high-pressure water atomization nozzle support frame 26. The support frame is formed by fixedly splicing a bottom support frame 27, a side fixed support frame 28, and a top support frame 29. The matrix high-pressure water atomization nozzle support frame 26 is fixedly installed inside the support frame, and high-pressure water atomization nozzles 2 are fixedly installed on the matrix high-pressure water atomization nozzle support frame 26 in a matrix arrangement. A water collection tank 3 is fixedly installed directly below the external water spray atomizing cooling device 1, and the outlet of the water collection tank 3 is connected to the water treatment system through the drainage pipe 9. Along the air flow direction, the air intake filter device 4 is fixedly installed with a gas-water separator, an air intake filter element and a thermometer and hygrometer 5 in sequence from front to back. The gas-water separator is directly in front of the air outlet of the external water spray atomizing cooling device 1, and the air outlet of the air intake filter device 4 is connected to the gas turbine intake volute. The external water spray atomizing cooling device 1 has a high-pressure water pump skid 6 distributed on its side. The high-pressure water pump skid 6 is equipped with a main water inlet pipeline, two backup high-pressure water supply branches, a high-pressure water supply main pipeline, and a return water pipeline.

[0022] Specifically, in existing technologies, the atomizing nozzle is placed after the intake filter element, and the atomization position is extremely close to the gas turbine intake volute. Large droplets do not have enough time to completely evaporate, and there is no effective interception structure. They directly enter the compressor and cause blade erosion. This application moves the atomization heat exchange process before the filtration device. On the one hand, it provides sufficient evaporation distance for the droplets. On the other hand, the subsequent filtration device can doubly intercept residual droplets and impurities in the water, and realize an external intake water spray atomization cooling system for gas turbines.

[0023] Furthermore, in order to achieve an external structural design, this application adopts a modular splicing load-bearing frame instead of an integrated structure welded and fixed to the original gas turbine intake system. This allows for rapid on-site assembly without requiring any hot work modifications to the original gas turbine intake system. The matrix-arranged high-pressure water atomizing nozzles 2 can completely cover the intake cross-section, achieving uniform atomization cooling of the intake airflow across the entire cross-section without any cooling dead zones.

[0024] In some other specific embodiments, the cooled airflow first passes through an air-water separator to complete the first interception of large droplets, and then passes through an intake filter to complete the second interception of small droplets and impurities, thus providing double protection to prevent droplets from entering the gas turbine; the temperature and humidity meter 5 is arranged at the end of the filter device, which can detect the real parameters of the air that finally enters the gas turbine in real time and provide feedback signals for system control.

[0025] Furthermore, the integrated skid-mounted structure integrates all pumps, valves, and instrument components into a single skid, requiring only the connection of inlet and outlet water pipes to the high-pressure water spray line on-site.

[0026] The main inlet water pipeline is equipped with a manual shut-off valve 10, an inlet pressure detection component, and a filter 25 in sequence along the water flow direction. The inlet ends of the two high-pressure water supply branches are connected to the outlet of the filter 25. Each high-pressure water supply branch is equipped with a high-pressure water pump, a regulating valve group, a check valve, and a water pump outlet pressure sensor in sequence along the water flow direction. Each high-pressure water supply branch is also equipped with a discharge solenoid valve between the regulating valve group and the check valve.

[0027] The outlets of the two high-pressure water supply branches converge into the high-pressure water supply main pipe. The high-pressure water supply main pipe is equipped with an inlet flow meter 13 and a high-pressure water spray atomizing nozzle shut-off solenoid valve 7 in sequence along the water flow direction. The outlet of the high-pressure water spray atomizing nozzle shut-off solenoid valve 7 is connected to the inlet of each high-pressure water spray atomizing nozzle 2 through the high-pressure water spray pipeline 8. The inlet of the return water pipeline is connected to the high-pressure water supply main pipe behind the inlet flow meter 13. A return water flow meter 14 is installed on the return water pipeline. The outlet of the return water pipeline is connected to the inlet main pipe in front of the filter 25, forming a closed-loop return water pressure stabilization circuit.

[0028] In this application, the two branch circuits are completely independent, and each branch circuit is equipped with its own dedicated water pump, regulating valve group, check valve, pressure sensor and discharge solenoid valve, so that they do not interfere with each other. If any component of a single branch circuit fails, it will not affect the normal operation of the other branch circuit. At the same time, the component parameters of the two branch circuits are completely matched, which can realize seamless switching between single-circuit operation and dual-circuit parallel operation.

[0029] The inlet pressure detection assembly includes an inlet pressure gauge 11 and an inlet pressure sensor 12 connected in parallel. Both the inlet pressure gauge 11 and the inlet pressure sensor 12 are connected to the main inlet pipeline between the manual shut-off valve 10 and the filter 25.

[0030] The two high-pressure water supply branches include a first high-pressure water supply branch and a second high-pressure water supply branch. The first high-pressure water supply branch is equipped with a high-pressure water pump A15, a regulating valve group A17, a high-pressure water pump check valve A22, and a high-pressure water pump outlet pressure sensor A20 in sequence along the water flow direction. A high-pressure water pump discharge solenoid valve A19 is provided in a branch between the regulating valve group A17 and the high-pressure water pump check valve A22.

[0031] The second high-pressure water supply branch is equipped with a high-pressure water pump B16, a regulating valve group B18, a high-pressure water pump check valve B23, and a high-pressure water pump outlet pressure sensor B24 in sequence along the water flow direction. A high-pressure water pump discharge solenoid valve B21 is installed between the regulating valve group B18 and the high-pressure water pump check valve B23 in the second high-pressure water supply branch.

[0032] To address the corrosion problem caused by long-term shutdown of high-pressure water pumps, both high-pressure water pumps A15 and B16 are equipped with instrument air purging interfaces on their inlet pipes. These interfaces are used to connect instrument air to purge the pump body and corresponding pipes.

[0033] The top opening of the water collection tank 3 completely covers the vertical projection area of ​​the external water spray atomizing cooling device 1, and is used to collect the cooling water dripping after atomization and condensation.

[0034] In practice, the cooling water after atomization and condensation, whether dripping from the high-pressure water spray atomizing nozzle 2 or flowing down from the frame and pipe wall of the external water spray atomizing cooling device 1, all drip within the vertical projection area of ​​the device; the opening of the water collection tank 3 completely covers this area, ensuring that all the condensed water falls into the water collection tank without splashing or leakage.

[0035] The present invention also provides a method for external intake water atomization cooling of a gas turbine, the method comprising: S1. Temperature detection and start-up control: When the temperature and humidity meter 5 detects that the air intake temperature is higher than the preset threshold, the valve on the high-pressure water spray pipeline 8 is opened, the high-pressure water pump is started, and the water spray pressure and flow rate are adjusted by the corresponding regulating valve group. S2, Flow rate upgrade control; when the temperature and humidity meter 5 detects that the intake air temperature has not dropped to the target value, another high-pressure water pump is started; S3. Condensate recovery: After the cooling water sprayed from the high-pressure water atomizing nozzle 2 is atomized and heat exchanged, some of the condensate drips into the water collection tank 3 and flows into the water treatment system through the drainage pipe 9 for recycling and reuse. S4. Fault-stabilized pressure control: When the high-pressure water spray atomizing nozzle 2 is blocked or damaged and / or any high-pressure water pump fails, the pressure and flow of the inlet and return water pipelines and the high-pressure water spray pipeline 8 are adjusted through the high-pressure water pump discharge solenoid valve, regulating valve group, inlet flow meter 13, return flow meter 14, and inlet pressure sensor 12 to ensure the continuous operation of the system.

[0036] The method also includes: when any high-pressure water pump stops working, instrument air is introduced through the instrument air purging interface of the high-pressure water pump inlet pipeline to purge the high-pressure water pump and the corresponding pipeline.

Claims

1. An external intake water spray atomization cooling system for a gas turbine, characterized in that, The device includes an external water spray atomizing cooling device (1), which is located at the air intake front end of the air intake filter device (4). The external water spray atomizing cooling device (1) includes a support frame and a matrix high-pressure water spray atomizing nozzle support frame (26). The support frame is formed by fixedly splicing a bottom support frame (27), a side fixed support frame (28), and a top support frame (29). The matrix high-pressure water spray atomizing nozzle support frame (26) is fixedly installed inside the support frame, and a matrix arrangement of high-pressure water spray atomizing nozzles (2) is fixedly installed on the matrix high-pressure water spray atomizing nozzle support frame (26). A water collection tank (3) is fixedly installed directly below the external water spray atomizing cooling device (1), and the outlet of the water collection tank (3) is connected to the water treatment system through a drainage pipe (9). The air intake filter device (4) is fixedly installed with a gas-water separator, an air intake filter element and a thermometer and hygrometer (5) in sequence from front to back along the air flow direction. The gas-water separator is directly in front of the air outlet of the external water spray atomizing cooling device (1). The air outlet of the air intake filter device (4) is connected to the gas turbine intake volute. The external water spray atomizing cooling device (1) has a high-pressure water pump skid (6) distributed on its side. The high-pressure water pump skid (6) is equipped with an inlet main pipeline, two backup high-pressure water supply branches, a high-pressure water supply main pipeline, and a return water pipeline.

2. The external intake water spray atomizing cooling system for a gas turbine according to claim 1, characterized in that, The main water inlet pipeline is provided with a manual shut-off valve (10), an inlet pressure detection component and a filter (25) in sequence along the water flow direction. The inlet ends of the two high-pressure water supply branches are connected to the outlet of the filter (25). Each high-pressure water supply branch is provided with a high-pressure water pump, a regulating valve group, a check valve and a water pump outlet pressure sensor in sequence along the water flow direction. Each high-pressure water supply branch is also provided with a discharge solenoid valve between the regulating valve group and the check valve.

3. The external intake water spray atomizing cooling system for a gas turbine according to claim 2, characterized in that, The outlets of the two high-pressure water supply branches converge into the high-pressure water supply main pipe. The high-pressure water supply main pipe is equipped with an inlet flow meter (13) and a high-pressure water spray atomizing nozzle shut-off solenoid valve (7) in sequence along the water flow direction. The outlet of the high-pressure water spray atomizing nozzle shut-off solenoid valve (7) is connected to the inlet of each high-pressure water spray atomizing nozzle (2) through the high-pressure water spray pipeline (8). The inlet of the return water pipeline is connected to the high-pressure water supply main pipe behind the inlet flow meter (13). The return water pipeline is equipped with a return water flow meter (14). The outlet of the return water pipeline is connected to the inlet main pipe at the front end of the filter (25), forming a closed-loop return water pressure stabilization circuit.

4. An external intake water spray atomizing cooling system for a gas turbine according to claim 2, characterized in that, The inlet pressure detection component includes an inlet pressure gauge (11) and an inlet pressure sensor (12) connected in parallel. Both the inlet pressure gauge (11) and the inlet pressure sensor (12) are connected to the main inlet pipeline between the manual shut-off valve (10) and the filter (25).

5. An external intake water spray atomizing cooling system for a gas turbine according to claim 4, characterized in that, The two high-pressure water supply branches include a first high-pressure water supply branch and a second high-pressure water supply branch. The first high-pressure water supply branch is provided with a high-pressure water pump A (15), a regulating valve group A (17), a high-pressure water pump check valve A (22), and a high-pressure water pump outlet pressure sensor A (20) in sequence along the water flow direction. The first high-pressure water supply branch is provided with a high-pressure water pump discharge solenoid valve A (19) between the regulating valve group A (17) and the high-pressure water pump check valve A (22).

6. An external intake water spray atomizing cooling system for a gas turbine according to claim 5, characterized in that, The second high-pressure water supply branch is provided with a high-pressure water pump B (16), a regulating valve group B (18), a high-pressure water pump check valve B (23), and a high-pressure water pump outlet pressure sensor B (24) in sequence along the water flow direction. The second high-pressure water supply branch is provided with a high-pressure water pump discharge solenoid valve B (21) between the regulating valve group B (18) and the high-pressure water pump check valve B (23).

7. An external intake water spray atomizing cooling system for a gas turbine according to claim 6, characterized in that, Both the inlet pipes of the high-pressure water pump A (15) and the high-pressure water pump B (16) are equipped with instrument air purging interfaces. The instrument air purging interfaces are used to connect instrument air to purge the pump body and the corresponding pipes.

8. An external intake water spray atomizing cooling system for a gas turbine according to claim 1, characterized in that, The top opening of the water collection tank (3) completely covers the vertical projection area of ​​the external water spray atomizing cooling device (1) and is used to receive the cooling water dripping after atomization and condensation.

9. An external intake water spray atomization cooling method for a gas turbine, employing the external intake water spray atomization cooling system for a gas turbine as described in any one of claims 1-8, characterized in that, The method includes: S1. Temperature detection and start-up control: When the temperature and humidity meter (5) detects that the air intake temperature is higher than the preset threshold, the valve on the high-pressure water spray pipeline (8) is opened, the high-pressure water pump is started, and the water spray pressure and flow rate are adjusted by the corresponding regulating valve group. S2, Flow rate upgrade control; when the temperature and humidity meter (5) detects that the inlet air temperature has not dropped to the target value, another high-pressure water pump is started; S3, Condensate recovery; After the cooling water sprayed by the high-pressure water atomizing nozzle (2) is atomized and heat exchanged, some of the condensate drips into the water collection tank (3) and flows into the water treatment system through the drainage pipe (9) for recycling and reuse; S4. Fault stabilization control: When the high-pressure water spray atomizing nozzle (2) is blocked or damaged and / or any high-pressure water pump fails, the pressure and flow of the inlet and outlet water pipes and the high-pressure water spray pipe (8) are adjusted by the high-pressure water pump discharge solenoid valve, regulating valve group, inlet flow meter (13), return flow meter (14), and inlet pressure sensor (12) to ensure the continuous operation of the system.

10. An external intake water spray atomization cooling system and cooling method for a gas turbine according to claim 9, characterized in that, The method further includes: when any high-pressure water pump stops working, introducing instrument air through the instrument air purging interface of the high-pressure water pump inlet pipeline to purge the high-pressure water pump and the corresponding pipeline.

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