A pipeline gas turbine spray cooling system shutdown protection system and alarm method

Abstract

The present application relates to a gas turbine spray evaporation cooling temperature reduction technical field, especially to a pipeline gas turbine spray cooling system parking protection system and alarm method, the water inlet pipeline and the sealing flush water inlet mother pipeline are simultaneously connected on the water inlet mother pipeline, the sealing flush water inlet mother pipeline is simultaneously connected with the first sealing flush pipeline and the second sealing flush pipeline, the water inlet pipeline is simultaneously connected with the first high pressure variable frequency water pump and the second high pressure variable frequency water pump, the first high pressure variable frequency water pump is connected with a plurality of water outlet pipelines through the first water outlet mother pipeline, the second high pressure variable frequency water pump is connected with another plurality of water outlet pipelines through the second water outlet mother pipeline, the first sealing flush pipeline is connected with the first high pressure variable frequency water pump, and the second sealing flush pipeline is connected with the second high pressure variable frequency water pump. The present application is simple to use, has good use effect, starts and stops according to the pressure and flow control system, can effectively ensure the safe operation of the whole device system, and avoids causing a major shutdown accident affecting the unit.

Description

Technical Field

[0001] This invention relates to the field of gas turbine spray evaporative cooling technology, and in particular to a shutdown protection system and alarm method for a pipeline gas turbine spray cooling system. Background Technology

[0002] Natural gas pipeline gas turbine spray evaporative cooling devices are typically installed on the side of the unit's intake duct. These devices generally consist of pump sets, valves, pipelines, and pipeline connectors such as clamps and tees. High-pressure demineralized water is transported through the pipelines to a spray matrix installed inside the gas turbine's intake duct. The high-pressure water is atomized from the nozzles, reducing the gas turbine's intake temperature and improving its fuel economy.

[0003] Since the medium transported by the unit is water, a leak could spread throughout the entire plant, potentially causing unit shutdowns and other accidents. Excessive pressure can damage solenoid valves, cause ferrule connections to detach, and damage the pump's mechanical seal. Failure of any instrument or safety valve on the unit could lead to even more serious accidents. Because it uses a needle-type nozzle, a pressure of 138 kg is required to achieve good atomization and improve evaporation efficiency. Low pressure will result in poor atomization, wasting demineralized water, and will also prevent the pump's mechanical seal from sealing effectively.

[0004] However, current patents and products involving spray evaporative cooling only address how to control the amount of water sprayed for spray evaporative cooling and how to control and reduce the temperature of the gas turbine, with little or overly simplistic mention of the system's own protection. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a shutdown protection system and alarm method for a pipeline gas turbine spray cooling system. This device can effectively ensure the safe operation of the device and avoid major shutdown accidents that affect the unit.

[0006] The technical solution of this invention to solve the above-mentioned technical problems is as follows: A shutdown protection system for a pipeline gas turbine spray cooling system, comprising an inlet main pipeline, an inlet pipeline, a sealing flushing inlet main pipeline, a first outlet main pipeline, a second outlet main pipeline, a first sealing flushing pipeline, a second sealing flushing pipeline, and a PLC controller. The inlet pipeline and the sealing flushing inlet main pipeline are simultaneously connected to the inlet main pipeline. The sealing flushing inlet main pipeline is simultaneously connected to the first sealing flushing pipeline and the second sealing flushing pipeline. The inlet pipeline is simultaneously connected to the inlet of the first high-pressure variable frequency water pump and the second high-pressure variable frequency water pump. The outlet of the first high-pressure variable frequency water pump is connected to multiple outlet pipelines through the first outlet main pipeline, and the outlet of the second high-pressure variable frequency water pump is connected to multiple other outlet pipelines through the second outlet main pipeline; the first sealing flushing pipeline is connected to the sealing flushing inlet of the first high-pressure variable frequency water pump, and the second sealing flushing pipeline is connected to the sealing flushing inlet of the second high-pressure variable frequency water pump. All outlet pipelines are connected to the outer wall of the gas turbine's air intake duct. The PLC controller is electrically connected to the first high-pressure variable frequency water pump and the second high-pressure variable frequency water pump.

[0007] The beneficial effects of this invention are: the structure of this invention is scientifically and rationally designed, it is simple to use, and it has good performance. By controlling the opening and closing of the system according to pressure and flow, it can effectively ensure the safe operation of the entire device system and avoid major shutdown accidents that could affect the unit.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the sealed flushing outlets of both the first high-pressure variable frequency water pump and the second high-pressure variable frequency water pump are connected to the sealed sewage main pipeline.

[0010] The beneficial effect of adopting the above-mentioned further solution is that it facilitates the discharge of sewage from the first high-pressure variable frequency water pump and the second high-pressure variable frequency water pump.

[0011] Furthermore, an inlet ball valve and an inlet filter are installed on the inlet main pipeline.

[0012] The beneficial effect of adopting the above-mentioned further solution is that the water in the inlet main pipeline can be filtered through the inlet main pipeline filter.

[0013] Furthermore, a sealed flushing main pipeline filter is installed on the sealed flushing main pipeline.

[0014] The beneficial effect of adopting the above-mentioned further solution is that the sealed flushing main pipeline filter can further filter the sealed flushing inlet main pipeline.

[0015] Furthermore, a first sealing flushing line pressure switch is installed on the first sealing flushing line, a second sealing flushing line pressure switch is installed on the second sealing flushing line, a first outlet water main line pressure switch is installed on the first outlet water main line, and a second outlet water main line pressure switch is installed on the second outlet water main line. The PLC controller is electrically connected to the first sealing flushing line pressure switch, the second sealing flushing line pressure switch, the first outlet water main line pressure switch, and the second outlet water main line pressure switch.

[0016] The beneficial effects of adopting the above-mentioned further scheme are: each pressure switch can monitor the water pressure on each pipeline in real time. When the water pressure on the pipeline exceeds the set threshold, the PLC controller (17) issues a pressure alarm and stops the operation of the system, which effectively ensures the safe operation of the entire device system and avoids major shutdown accidents that affect the unit.

[0017] Furthermore, a first outlet pressure transmitter is installed at the outlet of the first high-pressure variable frequency water pump, and a second outlet pressure transmitter is installed at the outlet of the second high-pressure variable frequency water pump. The PLC controller is electrically connected to the first outlet pressure transmitter and the second outlet pressure transmitter.

[0018] The beneficial effects of adopting the above-mentioned further solution are: the first outlet pressure transmitter can monitor the outlet water pressure of the first high-pressure variable frequency water pump in real time, and the second outlet pressure transmitter can monitor the outlet water pressure of the second high-pressure variable frequency water pump in real time, further ensuring the safety of the cooling system.

[0019] Furthermore, a flow switch and a solenoid valve are sequentially installed on the water outlet pipeline, and the PLC controller is electrically connected to the flow switch and the solenoid valve.

[0020] The beneficial effects of adopting the above-mentioned further solution are: the setting of the water outlet pipeline flow switch can detect the water outlet flow in real time. When the water outlet flow exceeds the set threshold, the PLC controller issues a pressure alarm and stops the system operation, effectively ensuring the safe operation of the entire device system and avoiding safety accidents.

[0021] Furthermore, the water outlet pipeline includes a first water outlet pipeline, a second water outlet pipeline, a third water outlet pipeline, a fourth water outlet pipeline, a fifth water outlet pipeline, a sixth water outlet pipeline, a seventh water outlet pipeline, and an eighth water outlet pipeline. The first water outlet main pipeline is connected to the first water outlet pipeline, the second water outlet pipeline, the third water outlet pipeline, and the fourth water outlet pipeline, respectively. The second water outlet main pipeline is connected to the fifth water outlet pipeline, the sixth water outlet pipeline, the seventh water outlet pipeline, and the eighth water outlet pipeline, respectively.

[0022] The beneficial effect of adopting the above-mentioned further solution is that using multiple water outlet pipelines can improve the spray cooling effect.

[0023] Furthermore, a first outlet main pipeline safety valve is installed on the first outlet main pipeline, a second outlet main pipeline safety valve is installed on the second outlet main pipeline, a first sealing flushing pipeline solenoid valve is installed on the first sealing flushing pipeline, a second sealing flushing pipeline solenoid valve is installed on the second sealing flushing pipeline, and a flow meter is installed on the inlet pipeline; the PLC controller is electrically connected to the first outlet main pipeline safety valve, the second outlet main pipeline safety valve, the first sealing flushing pipeline solenoid valve, the second sealing flushing pipeline solenoid valve, and the flow meter.

[0024] The beneficial effects of adopting the above-mentioned further solutions are: the safety valves of the first and second outlet main pipelines can ensure the water supply safety of the first and second outlet main pipelines in real time; and the solenoid valves of the first and second sealing flushing pipelines can be opened and closed in a timely manner as needed.

[0025] This invention addresses the aforementioned technical problems by providing an alarm method for a shutdown protection system of a pipeline gas turbine spray cooling system, comprising the following steps:

[0026] Sealing water passes through the first sealing flushing pipeline and the second sealing flushing pipeline, and it is determined whether the pressure of the sealing water triggers the upper and lower limit thresholds set by the first sealing flushing pipeline and the second sealing flushing pipeline.

[0027] The demineralized water flows through the first and second outlet water mains pipelines, and it is determined whether the pressure of the demineralized water triggers the upper and lower limit thresholds set by the first and second outlet water mains pipelines.

[0028] When the pressure of the sealing water triggers the upper and lower limit thresholds set for the first sealing flushing pipeline and the second sealing flushing pipeline, or when the pressure of the demineralized water triggers the upper and lower limit thresholds set for the first outlet main pipeline and the second outlet main pipeline, the PLC controller issues a pressure alarm and stops the system operation.

[0029] Based on the pre-cooling temperature, the PLC controller calculates the water spray volume and controls the demineralized water to be sprayed out through the outlet pipeline;

[0030] When the demineralized water sprayed from the outlet pipeline reaches the preset flow threshold, the PLC controller issues a flow alarm and stops the demineralized water spraying.

[0031] The beneficial effects of adopting the above technical solution are: it can control the opening and closing of the system in real time according to pressure and flow, effectively ensure the safe operation of the entire system, and avoid major shutdown accidents that could affect the unit. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the present invention;

[0033] The attached diagram lists the components represented by each number as follows:

[0034] 1. Main water inlet pipe; 2. Inlet pipe; 3. First outlet pipe; 4. Second outlet pipe; 5. Third outlet pipe; 6. Fourth outlet pipe; 7. Fifth outlet pipe; 8. Sixth outlet pipe; 9. Seventh outlet pipe; 10. Eighth outlet pipe; 11. Outer wall of air inlet duct; 12. Sealing flushing main water inlet pipe; 13. First sealing flushing pipe; 14. Second sealing flushing pipe; 15. First outlet main water pipe; 16. Second outlet... 17. Main pipeline; 18. PLC controller; 19. Weather station; 20. Sealed main sewage pipeline; 21. Inlet ball valve; 22. First outlet pipeline solenoid valve; 23. Second outlet pipeline solenoid valve; 24. Third outlet pipeline solenoid valve; 25. Fourth outlet pipeline solenoid valve; 26. Fifth outlet pipeline solenoid valve; 27. Sixth outlet pipeline solenoid valve; 28. Seventh outlet pipeline solenoid valve; 29. ​​Eighth outlet pipeline solenoid valve; 20. First outlet main pipeline 30. Safety valve for the second outlet main pipeline; 31. Solenoid valve for the first sealing flushing pipeline; 32. Solenoid valve for the second sealing flushing pipeline; 33. Filter for the inlet main pipeline; 34. Filter for the sealing flushing main pipeline; 35. First high-pressure variable frequency water pump; 36. Second high-pressure variable frequency water pump; 37. Flow switch for the first outlet pipeline; 38. Flow switch for the second outlet pipeline; 39. Flow switch for the third outlet pipeline; 40. Flow switch for the fourth outlet pipeline; 41. Flow switch for the fifth outlet pipeline; 42. Flow switch for the sixth outlet pipeline; 43. Flow switch for the seventh outlet pipeline; 44. Flow switch for the eighth outlet pipeline; 45. Pressure switch for the first sealing flushing pipeline; 46. Pressure switch for the second sealing flushing pipeline; 47. Pressure switch for the first outlet main pipeline; 48. Pressure switch for the second outlet main pipeline; 49. First outlet pressure transmitter; 50. Second outlet pressure transmitter; 51. Flow meter. Detailed Implementation

[0035] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0036] Example 1

[0037] like Figure 1As shown, the embodiment of the present invention includes an inlet main line 1, an inlet main line 2, a sealed flushing inlet main line 12, a first outlet main line 15, a second outlet main line 16, a first sealed flushing line 13, a second sealed flushing line 14, and a PLC controller 17. The inlet main line 1 is equipped with an inlet ball valve 20 and an inlet main line filter 33. The inlet main line filter 33 can filter the liquid entering the inlet main line 1 to prevent impurities in the liquid from affecting subsequent components. The inlet ball valve 20 can easily open and close the inlet main line 1.

[0038] The water inlet pipeline 2 and the sealed flushing water inlet main pipeline 12 are connected to the water inlet main pipeline 1. The sealed flushing water inlet main pipeline 12 is equipped with a sealed flushing water inlet main pipeline filter 34 to further filter the liquid entering the sealed flushing water inlet main pipeline 12, further avoiding the impact of impurities on subsequent components and improving safety.

[0039] The sealed flushing inlet water line 12 is connected to both the first sealed flushing line 13 and the second sealed flushing line 14. The first sealed flushing line 13 is equipped with a first sealed flushing line pressure switch 45, and the second sealed flushing line 14 is equipped with a second sealed flushing line pressure switch 46. The first sealed flushing line pressure switch 45 and the second sealed flushing line pressure switch 46 are used to monitor the pressure in the first sealed flushing line 13 and the second sealed flushing line 14 in real time, respectively.

[0040] The inlet pipeline 2 is connected to the inlet of the first high-pressure variable frequency water pump 35 and the second high-pressure variable frequency water pump 36. The outlet of the first high-pressure variable frequency water pump 35 is provided with a first outlet pressure transmitter 49, and the outlet of the second high-pressure variable frequency water pump 36 is provided with a second outlet pressure transmitter 50. The outlet of the first high-pressure variable frequency water pump 35 is connected to multiple outlet pipelines through the first outlet main pipeline 15, and the outlet of the second high-pressure variable frequency water pump 36 is connected to multiple other outlet pipelines through the second outlet main pipeline 16.

[0041] A first outlet main pipeline pressure switch 47 is installed on the first outlet main pipeline 15, and a second outlet main pipeline pressure switch 48 is installed on the second outlet main pipeline 16, for real-time monitoring of the water pressure of the first outlet main pipeline 15 and the second outlet main pipeline 16.

[0042] In this embodiment, the water outlet pipeline includes a first water outlet pipeline 3, a second water outlet pipeline 4, a third water outlet pipeline 5, a fourth water outlet pipeline 6, a fifth water outlet pipeline 7, a sixth water outlet pipeline 8, a seventh water outlet pipeline 9, and an eighth water outlet pipeline 10. The first water outlet main pipeline 15 is connected to the first water outlet pipeline 3, the second water outlet pipeline 4, the third water outlet pipeline 5, and the fourth water outlet pipeline 6, respectively. The second water outlet main pipeline 16 is connected to the fifth water outlet pipeline 7, the sixth water outlet pipeline 8, the seventh water outlet pipeline 9, and the eighth water outlet pipeline 10, respectively.

[0043] The first sealing flushing pipeline 13 is connected to the sealing flushing inlet of the first high-pressure variable frequency water pump 35, the second sealing flushing pipeline 14 is connected to the sealing flushing inlet of the second high-pressure variable frequency water pump 36, and the water outlet pipelines are all connected to the outer wall surface 11 of the gas turbine's air intake.

[0044] In this embodiment, the sealed flushing outlets of the first high-pressure variable frequency water pump 35 and the second high-pressure variable frequency water pump 36 are both connected to the sealed sewage main pipeline 19, so as to discharge the sewage in the first high-pressure variable frequency water pump 35 and the second high-pressure variable frequency water pump 36.

[0045] In this embodiment, a flow switch and a solenoid valve are sequentially installed on the water outlet pipeline. Specifically, a first flow switch 37 and a first solenoid valve 21 are sequentially installed on the first water outlet pipeline 3; a second flow switch 38 and a second solenoid valve 22 are sequentially installed on the second water outlet pipeline 4; a third flow switch 39 and a third solenoid valve 23 are sequentially installed on the third water outlet pipeline 5; and a fourth water outlet pipeline is sequentially installed on the fourth water outlet pipeline 6. The fifth outlet pipeline 7 is equipped with a flow switch 40 and a solenoid valve 24. The sixth outlet pipeline 8 is equipped with a flow switch 42 and a solenoid valve 26. The seventh outlet pipeline 9 is equipped with a flow switch 43 and a solenoid valve 27. The eighth outlet pipeline 10 is equipped with a flow switch 44 and a solenoid valve 28.

[0046] In this embodiment, a first outlet mainline safety valve 29 is installed on the first outlet mainline 15, a second outlet mainline safety valve 30 is installed on the second outlet mainline 16, a first sealing flushing solenoid valve 31 is installed on the first sealing flushing pipeline 13, and a second sealing flushing solenoid valve 32 is installed on the second sealing flushing pipeline 14. The first outlet mainline safety valve 29 and the second outlet mainline safety valve 30 can ensure the water supply safety of the first outlet mainline 15 and the second outlet mainline 16 in real time. The installation of the first sealing flushing solenoid valve 31 and the second sealing flushing solenoid valve 32 can open and close the first outlet mainline 15 and the second outlet mainline 16 in a timely manner as needed.

[0047] The PLC controller 17 is connected to the weather station 18. The PLC controller 17 is electrically connected to the flow meter 51, the first outlet pressure transmitter 49, the second outlet pressure transmitter 50, the first outlet water pipeline flow switch 37, the first outlet water pipeline solenoid valve 21, the second outlet water pipeline flow switch 38, the second outlet water pipeline solenoid valve 22, the third outlet water pipeline flow switch 39, the third outlet water pipeline solenoid valve 23, the fourth outlet water pipeline flow switch 40, the fourth outlet water pipeline solenoid valve 24, the fifth outlet water pipeline flow switch 41, and the fifth outlet water pipeline solenoid valve 22. Water pipeline solenoid valve 25, sixth outlet water pipeline flow switch 42, seventh outlet water pipeline flow switch 43, seventh outlet water pipeline solenoid valve 27, eighth outlet water pipeline flow switch 44, eighth outlet water pipeline solenoid valve 28, first sealing flushing pipeline solenoid valve 31, second sealing flushing pipeline solenoid valve 32, first high-pressure variable frequency water pump 35, second high-pressure variable frequency water pump 36, first sealing flushing pipeline pressure switch 45, second sealing flushing pipeline pressure switch 46, first outlet main pipeline pressure switch 47, and second outlet main pipeline pressure switch 48.

[0048] The PLC controller 17 monitors the pressure of the first sealing flushing pipeline pressure switch 45 and the second sealing flushing pipeline pressure switch 46 in real time. When the pressure exceeds the set threshold, the PLC controller 17 issues a pressure alarm and stops the system operation.

[0049] The PLC controller 17 monitors the pressure of the first outlet main pipeline pressure switch 47 and the second outlet main pipeline pressure switch 48 in real time. When the pressure exceeds the set threshold, and the pressure requirements of the first outlet pressure transmitter 49 and the second outlet pressure transmitter 50 are met at the same time, the PLC controller 17 issues a pressure alarm and stops the operation of the system.

[0050] The flow switches 37, 38, 39, 40, 41, 42, 43, and 44 of the first, second, third, fourth, fifth, sixth, seventh, and eighth outlet pipelines are used to monitor the flow of the corresponding outlet pipelines and summarize the monitored data to the PLC controller 17. When the summarized flow value exceeds the set threshold and meets the flow threshold accumulated by the flow meter 51 for each level, the PLC controller 17 issues a flow alarm and stops the system operation.

[0051] In this embodiment, the first sealed flushing pipeline pressure switch 45, the second sealed flushing pipeline pressure switch 46, the first outlet main pipeline pressure switch 47, and the second outlet main pipeline pressure switch 48 are all normally closed pressure switches with high and low limits, the lower limit being 97 kg and the higher limit being 166 kg. The first outlet main pipeline safety valve 29 and the second outlet main pipeline safety valve 30 are self-operated safety valves with a set pressure of 166 kg, which open when the pressure exceeds 166 kg.

[0052] The structure of this embodiment is scientifically and rationally designed, simple to use, and effective. It controls the opening and closing of the system according to pressure and flow, which can effectively ensure the safe operation of the entire system and avoid major shutdown accidents that could affect the unit.

[0053] Example 2

[0054] This embodiment discloses an alarm method for a shutdown protection system of a pipeline gas turbine spray cooling system as described above, including the following steps:

[0055] Sealing water flows through the first sealing flushing line 13 and the second sealing flushing line 14. When the pressure of the sealing water triggers the upper and lower limit thresholds set by the pressure switch 45 of the first sealing flushing line and the pressure switch 46 of the second sealing flushing line.

[0056] The PLC controller 17 receives signals from the first sealing flushing pipeline pressure switch 45 and the second sealing flushing pipeline pressure switch 46. The PLC controller 17 issues a pressure alarm and stops the system operation.

[0057] Demineralized water flows through the first outlet main line 15 and the second outlet main line 16. When the pressure of the demineralized water triggers the upper and lower thresholds set by the pressure switch 47 and the pressure switch 48 of the first outlet main line, and simultaneously meets the pressure requirements of the first outlet pressure transmitter 49 and the second outlet pressure transmitter 50.

[0058] The PLC controller 17 receives signals from the first outlet water supply line pressure switch 47 and the second outlet water supply line pressure switch 48. The PLC controller 17 issues a pressure alarm and stops the system operation.

[0059] Based on the pre-cooling temperature, the PLC controller 17 calculates the water spray volume and controls the demineralized water to be sprayed out through eight outlet pipes;

[0060] When the flow rate of the demineralized water triggers the threshold set by the corresponding flow switch on the eight outlet pipelines and simultaneously meets the flow rate threshold accumulated by the flow meter 51 for each stage, the PLC controller 17 issues a flow alarm and stops the system operation.

[0061] In the description of this invention, it should be understood that the terms "center," "length," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "inner," "outer," "circumferential," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the system or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0062] In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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 of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0064] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A shutdown protection system for a pipeline gas turbine spray cooling system, characterized in that, The system includes an inlet main line (1), an inlet pipeline (2), a sealed flushing inlet main line (12), a first outlet main line (15), a second outlet main line (16), a first sealed flushing pipeline (13), a second sealed flushing pipeline (14), and a PLC controller (17). The inlet pipeline (2) and the sealed flushing inlet main line (12) are connected to the inlet main line (1). The sealed flushing inlet main line (12) is connected to both the first sealed flushing pipeline (13) and the second sealed flushing pipeline (14). The inlet pipeline (2) is connected to the PLC controller (17). The inlet of the first high-pressure variable frequency water pump (35) and the second high-pressure variable frequency water pump (36) are connected. The outlet of the first high-pressure variable frequency water pump (35) is connected to multiple outlet pipelines through the first outlet main pipeline (15). The outlet of the second high-pressure variable frequency water pump (36) is connected to multiple other outlet pipelines through the second outlet main pipeline (16). The first sealing flushing pipeline (13) is connected to the sealing flushing inlet of the first high-pressure variable frequency water pump (35), and the second sealing flushing pipeline (14) is connected to the second high-pressure variable frequency water pump. (36) The sealed flushing inlet, the water outlet pipelines are all connected to the outer wall (11) of the gas turbine intake duct, the PLC controller (17) is electrically connected to the first high-pressure variable frequency water pump (35) and the second high-pressure variable frequency water pump (36); the first sealed flushing pipeline (13) is equipped with a first sealed flushing pipeline pressure switch (45), the second sealed flushing pipeline (14) is equipped with a second sealed flushing pipeline pressure switch (46), and the first water outlet main pipeline (15) is equipped with a first water outlet main pipeline pressure switch (47). The second outlet main pipeline (16) is equipped with a second outlet main pipeline pressure switch (48). The PLC controller (17) is electrically connected to the first sealing flushing pipeline pressure switch (45), the second sealing flushing pipeline pressure switch (46), the first outlet main pipeline pressure switch (47), and the second outlet main pipeline pressure switch (48). The outlet pipeline is sequentially equipped with an outlet pipeline flow switch and an outlet pipeline solenoid valve. The PLC controller (17) is electrically connected to the outlet pipeline flow switch and the outlet pipeline solenoid valve.

2. The shutdown protection system for a pipeline gas turbine spray cooling system according to claim 1, characterized in that, The sealed flushing outlets of the first high-pressure variable frequency water pump (35) and the second high-pressure variable frequency water pump (36) are both connected to the sealed sewage main pipeline (19).

3. The shutdown protection system for a pipeline gas turbine spray cooling system according to claim 1, characterized in that, The inlet main pipeline (1) is equipped with an inlet ball valve (20) and an inlet main pipeline filter (33).

4. The shutdown protection system for a pipeline gas turbine spray cooling system according to claim 1, characterized in that, A sealed flushing main line filter (34) is installed on the sealed flushing main line (12).

5. The shutdown protection system for a pipeline gas turbine spray cooling system according to claim 1, characterized in that, The first high-pressure variable frequency water pump (35) is provided with a first outlet pressure transmitter (49) at its outlet, and the second high-pressure variable frequency water pump (36) is provided with a second outlet pressure transmitter (50) at its outlet. The PLC controller (17) is electrically connected to the first outlet pressure transmitter (49) and the second outlet pressure transmitter (50).

6. The shutdown protection system for a pipeline gas turbine spray cooling system according to claim 1, characterized in that, The water outlet pipelines include a first water outlet pipeline (3), a second water outlet pipeline (4), a third water outlet pipeline (5), a fourth water outlet pipeline (6), a fifth water outlet pipeline (7), a sixth water outlet pipeline (8), a seventh water outlet pipeline (9), and an eighth water outlet pipeline (10). The first water outlet main pipeline (15) is connected to the first water outlet pipeline (3), the second water outlet pipeline (4), the third water outlet pipeline (5), and the fourth water outlet pipeline (6), respectively. The second water outlet main pipeline (16) is connected to the fifth water outlet pipeline (7), the sixth water outlet pipeline (8), the seventh water outlet pipeline (9), and the eighth water outlet pipeline (10), respectively.

7. A shutdown protection system for a pipeline gas turbine spray cooling system according to claim 1, characterized in that, A first outlet main pipeline safety valve (29) is provided on the first outlet main pipeline (15), a second outlet main pipeline safety valve (30) is provided on the second outlet main pipeline (16), a first sealing flushing pipeline solenoid valve (31) is provided on the first sealing flushing pipeline (13), a second sealing flushing pipeline solenoid valve (32) is provided on the second sealing flushing pipeline (14), and a flow meter (51) is provided on the inlet pipeline (2); the PLC controller (17) is electrically connected to the first outlet main pipeline safety valve (29), the second outlet main pipeline safety valve (30), the first sealing flushing pipeline solenoid valve (31), the second sealing flushing pipeline solenoid valve (32), and the flow meter (51).

8. An alarm method for a shutdown protection system of a pipeline gas turbine spray cooling system as described in any one of claims 1-7, characterized in that, Includes the following steps: The sealing water passes through the first sealing flushing line (13) and the second sealing flushing line (14), and it is determined whether the pressure of the sealing water triggers the upper and lower limit thresholds set by the first sealing flushing line (13) and the second sealing flushing line (14); The demineralized water flows through the first outlet main pipe (15) and the second outlet main pipe (16). It is determined whether the pressure of the demineralized water triggers the upper and lower limit thresholds set by the first outlet main pipe (15) and the second outlet main pipe (16). The PLC controller (17) monitors the amount of demineralized water sprayed from the outlet pipeline; When the pressure of the sealing water triggers the upper and lower limit thresholds set by the first sealing flushing pipeline (13) and the second sealing flushing pipeline (14), or when the pressure of the demineralized water triggers the upper and lower limit thresholds set by the first outlet water main pipeline (15) and the second outlet water main pipeline (16), or when the demineralized water sprayed from the outlet water pipeline reaches the preset flow rate threshold, the PLC controller (17) issues a pressure alarm or flow rate alarm and stops the operation of the system.

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