Water supply system of gas turbine air cooler

Abstract

The invention provides a water supply system of a gas turbine air cooler. The water supply system comprises a steam exhaust device, a low-pressure steam pocket, a high-pressure steam pocket, the gas turbine air cooler, a condensed water supply pipeline, a gas turbine air cooler water supply pipeline, a high-pressure water supply pump pipeline, a high-pressure steam pocket water supply pipeline and a cooling water return pipeline. Before a gas turbine is ignited, a circulation loop is formed by a condensed water supply pipeline, a gas turbine air cooler water supply pipeline, a gas turbine air cooler, a cooling water return pipeline and a steam exhaust device, and the circulation loop is used for adjusting the temperature and flow of the gas turbine air cooler; when the temperature and the flow reach starting conditions, igniting the gas turbine, closing a condensed water supply pipeline, opening a high-pressure water supply pump pipeline, supplying water to a gas turbine air cooler through a low-pressure steam pocket, supplying water to the gas turbine air cooler through water which does not pass through a shaft seal heater before the gas turbine is ignited, and supplying water through the low-pressure steam pocket after the gas turbine is started; damage to the high-pressure water feeding pump is effectively reduced, and a large amount of water does not need to be changed.

Description

Technical Field

[0001] The invention relates to the technical field of water supply for air coolers, and in particular to a water supply system for a combustion engine air cooler. Background Art

[0002] The air for cooling the rotor and turbine blades of the gas turbine comes from part of the exhaust gas of the axial flow compressor. The exhaust gas of the compressor passes through the water-cooled gas turbine air cooler and is filtered to cool the rotor. Direct cooling occurs at the fir-tree-shaped root of each stage of the moving blades. The cooling water circulation water supply of the gas turbine air cooler is supplied to the air cooler by the low-pressure drum water through the high-pressure feed water pump, and the condensed water heated by the shaft seal heater is used as cooling water. Before the gas turbine is started, the inlet water temperature of the gas turbine air cooler must be lower than 60°C. When the unit is cold started, due to the low temperature of the low-pressure drum water, the cooling water does not need to be put into operation, or a very small opening can meet the conditions. The inlet pressure of the high-pressure feed water pump is maintained at about 0.5MPa, and the inlet pressure of the high-pressure feed water pump will not fluctuate when the cooling water is put into operation. When the unit is hot or warm, the water temperature of the low-pressure drum is about 180°C, and the water temperature of the exhaust device is relatively high. The temperature of the condensate rises after being heated by the shaft seal, resulting in poor cooling effect. The air cooler inlet water temperature meets the conditions and the desuperheating water valve needs to be fully opened. The condensate supply pressure is about 3MPa, and the desuperheating water is connected to the high-pressure feed water pump. When the desuperheating water is put into use, the inlet of the high-pressure feed water pump is 3MPa and the temperature is about 60°C. After the engine is ignited, the condensate desuperheating water needs to be withdrawn, and the TCA water supply is supplied by the low-pressure drum. The inlet temperature of the high-pressure feed water pump will quickly rise from below 60°C to about 180°C, and the inlet pressure of the high-pressure feed water pump will drop from 3MPa to 0.5MPa.

[0003] However, the inlet temperature and pressure of the high-pressure feedwater pump often fluctuate greatly, causing certain damage to the high-pressure feedwater pump. In addition, in order to meet the inlet temperature of the air cooler in the hot or warm state, the exhaust device needs to replace a large amount of water to meet the requirements. Summary of the invention

[0004] The present invention provides a water supply system for a combustion engine air cooler, which is used to solve the defect in the prior art that a large amount of water needs to be replaced to adjust the temperature of the air cooler.

[0005] In a first aspect, the present invention provides a water supply system for a gas turbine air cooler, comprising: a steam exhaust device, a low-pressure drum, a high-pressure drum, a gas turbine air cooler, a condensate water supply pipeline, a gas turbine air cooler water supply pipeline, a high-pressure feed water pump pipeline, a high-pressure drum water supply pipeline and a cooling water return pipeline;

[0006] The exhaust device is connected to the gas turbine air cooler water supply pipeline through the condensate water supply pipeline, the condensate water supply pipeline is also connected to the low-pressure drum, the low-pressure drum is connected to the high-pressure drum water supply pipeline and the gas turbine air cooler water supply pipeline respectively through the high-pressure feed water pump pipeline, the high-pressure drum and the exhaust device are connected to the gas turbine air cooler respectively through the cooling water recovery pipeline;

[0007] Before the engine is ignited, a circulation loop is formed through the condensate water supply pipeline, the engine air cooler water supply pipeline, the engine air cooler, the cooling water return pipeline and the exhaust device, and the circulation loop is used to adjust the temperature and flow of the engine air cooler;

[0008] When the temperature and flow rate reach the starting conditions, the engine is ignited, the condensate water supply pipeline is closed, the high-pressure water supply pump pipeline is opened, and water is supplied to the engine air cooler through the low-pressure steam drum.

[0009] A water supply system for a combustion engine air cooler provided by the present invention further comprises:

[0010] When the load of the gas turbine reaches a preset value, the return water of the gas turbine air cooler is cut from the exhaust device to the high-pressure steam drum.

[0011] According to a water supply system for a gas turbine air cooler provided by the present invention, the condensate water supply pipeline comprises: a condensate pre-pump, an iron removal filter, a condensate pump, a condensate booster pump and a valve;

[0012] One end of the condensate pre-pump is connected to the exhaust device, and the other end is connected to the water supply pipeline of the gas turbine air cooler through the iron removal filter, the condensate pump, the condensate booster pump and the valve in sequence;

[0013] The condensate pre-pump, iron removal filter, condensate pump, condensate booster pump and valve are used to supply condensate to the engine air cooler before the engine is ignited.

[0014] According to a water supply system for a gas turbine air cooler provided by the present invention, the valve comprises: an electric door at the inlet of a condensate booster pump, a check valve at the outlet of a condensate booster pump, an electric door at the outlet of a condensate booster pump, and an electric regulating valve at the outlet of a condensate booster pump;

[0015] The condensate booster pump inlet electric door is arranged between the condensate pump and the condensate booster pump, and the condensate booster pump outlet check valve, the condensate booster pump outlet electric door and the condensate booster pump outlet electric regulating valve are sequentially arranged between the condensate booster pump and the gas turbine air cooler water supply pipeline.

[0016] A water supply system for a combustion engine air cooler according to the present invention further includes a shaft seal heater;

[0017] One end of the shaft seal heater is connected to the pipeline between the condensate pump and the electric door at the inlet of the condensate booster pump, and the other end is connected to the low-pressure drum;

[0018] The condensate in the condensate supply pipeline is not heated by the shaft seal heater.

[0019] According to a water supply system for a gas turbine air cooler provided by the present invention, the cooling water return pipeline comprises: a high-pressure drum branch and a steam exhaust device branch;

[0020] The high-pressure steam drum branch is used to connect the gas engine air cooler with the high-pressure steam drum, and the exhaust device branch is used to connect the gas engine air cooler with the exhaust device.

[0021] According to a water supply system for a gas turbine air cooler provided by the present invention, the high-pressure drum branch comprises: a manual door for the gas turbine air cooler to return to the high-pressure drum inlet, a regulating valve for the gas turbine air cooler to return to the high-pressure drum inlet, a check valve for the gas turbine air cooler to return to the high-pressure drum inlet, and a flow transmitter for the gas turbine air cooler to return to the high-pressure drum;

[0022] The gas turbine air cooler is connected to the high-pressure steam drum via the manual door of the gas turbine air cooler return to the high-pressure steam drum inlet, the regulating valve of the gas turbine air cooler return to the high-pressure steam drum inlet, the check valve of the gas turbine air cooler return to the high-pressure steam drum inlet and the gas turbine air cooler return to the high-pressure steam drum flow transmitter in sequence.

[0023] According to a water supply system for a gas turbine air cooler provided by the present invention, the exhaust device branch comprises: an electric door in front of a regulating valve at an inlet of a gas turbine air cooler returning to an exhaust device, a regulating valve at an inlet of a gas turbine air cooler returning to an exhaust device, and a flow meter transmitter at a gas turbine air cooler returning to an exhaust device;

[0024] The gas turbine air cooler is connected to the exhaust device in sequence through the electric door in front of the gas turbine air cooler return and exhaust device inlet regulating valve, the gas turbine air cooler return and exhaust device inlet regulating valve and the gas turbine air cooler return and exhaust device flow meter transmitter.

[0025] According to a water supply system for a gas turbine air cooler provided by the present invention, the gas turbine air cooler water supply pipeline comprises: a gas turbine air cooler main water supply valve, a gas turbine air cooler auxiliary water supply valve, a gas turbine air cooler water supply flow transmitter, a gas turbine air cooler water supply pressure transmitter and a gas turbine air cooler water supply temperature transmitter;

[0026] One end of the main water supply valve of the gas turbine air cooler and the auxiliary water supply valve of the gas turbine air cooler after being connected in parallel are respectively connected to the condensate water supply pipeline and the condensate water supply pipeline, and the other end is connected to the gas turbine air cooler through the gas turbine air cooler water supply flow transmitter, the gas turbine air cooler water supply pressure transmitter and the gas turbine air cooler water supply temperature transmitter in sequence.

[0027] According to a water supply system for a combustion engine air cooler provided by the present invention, the high-pressure drum water supply pipeline comprises: a high-pressure drum water supply regulating valve and a high-pressure drum water supply electric valve;

[0028] The high-pressure steam drum is connected to the high-pressure water supply pump pipeline through the high-pressure steam drum water supply regulating valve and the high-pressure steam drum water supply electric valve in sequence.

[0029] The present invention provides a water supply system for a gas turbine air cooler, comprising: an exhaust device, a low-pressure drum, a high-pressure drum, a gas turbine air cooler, a condensate water supply pipeline, a gas turbine air cooler water supply pipeline, a high-pressure feed water pump pipeline, a high-pressure drum water supply pipeline and a cooling water return pipeline; the exhaust device is connected to the gas turbine air cooler water supply pipeline through the condensate water supply pipeline, the condensate water supply pipeline is also connected to the low-pressure drum, the low-pressure drum is respectively connected to the high-pressure drum water supply pipeline and the gas turbine air cooler water supply pipeline through the high-pressure feed water pump pipeline, the high-pressure drum and the exhaust device are respectively connected to the gas turbine air cooler through the cooling water recovery pipeline Connected; before the gas turbine is ignited, a circulation loop is formed through the condensate supply pipeline, the gas turbine air cooler supply pipeline, the gas turbine air cooler, the cooling water return pipeline and the exhaust device, and the circulation loop is used to adjust the temperature and flow of the gas turbine air cooler; when the temperature and flow reach the starting conditions, the gas turbine is ignited, the condensate supply pipeline is closed, the high-pressure feed water pump pipeline is opened, and the gas turbine air cooler is supplied with water through the low-pressure steam drum. Before the gas turbine is ignited, the gas turbine air cooler is supplied with water through the water that has not passed through the shaft seal heater. After starting, water is supplied through the low-pressure steam drum, which effectively reduces the damage to the high-pressure feed water pump and does not require a large amount of water replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of the principle of a water supply system for a gas turbine air cooler provided in an embodiment of the present invention.

[0032] Reference numerals:

[0033] 1. Exhaust device; 2. Condensate pre-pump; 3. Iron removal filter; 4. Condensate pump; 5. Condensate booster pump; 6. Shaft seal heater; 7. Low-pressure drum; 8. High-pressure feed water pump; 9. Gas turbine air cooler; 10. High-pressure drum; 11. Condensate booster pump inlet electric door; 12. Condensate booster pump outlet check valve; 13. Condensate booster pump outlet electric door; 14. Condensate booster pump outlet electric regulating valve; 15. High-pressure feed water pump inlet electric door; 16. High-pressure feed water pump outlet electric door; 17. High-pressure feed water pump outlet to TCA water supply electric regulating valve; 18. TCA main water supply valve ; 19. TCA auxiliary water supply valve; 20. Electric door in front of TCA return and exhaust device inlet regulating valve; 21. TCA return and exhaust device inlet regulating valve; 22. TCA return high-pressure steam drum inlet manual door; 23. TCA return high-pressure steam drum inlet regulating valve; 24. TCA return high-pressure steam drum inlet check valve; 25. High-pressure steam drum water supply regulating valve; 26. High-pressure steam drum water supply electric door; 27. TCA water supply flow transmitter; 28. TCA water supply pressure transmitter; 29. ​​TCA water supply temperature transmitter; 30. TCA return and exhaust device flow meter transmitter; 31. TCA return high-pressure steam drum flow transmitter. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Figure 1 It is a schematic diagram of the principle of a water supply system for a gas turbine air cooler provided in an embodiment of the present invention.

[0036] like Figure 1As shown, the water supply system of the gas turbine air cooler provided by the embodiment of the present invention comprises: an exhaust device 1, a low-pressure drum 7, a high-pressure drum 10, a gas turbine air cooler 9, a condensate water supply pipeline, a gas turbine air cooler water supply pipeline, a high-pressure feed water pump 8 pipeline, a high-pressure drum 10 water supply pipeline and a cooling water return pipeline; the exhaust device 1 is connected to the gas turbine air cooler water supply pipeline through the condensate water supply pipeline, the condensate water supply pipeline is also connected to the low-pressure drum 7, and the low-pressure drum 7 is respectively connected to the high-pressure drum 10 water supply pipeline and the gas turbine air cooler water return pipeline through the high-pressure feed water pump 8 pipeline. The water supply pipeline of the cooler is connected, and the high-pressure steam drum 10 and the exhaust device 1 are respectively connected to the gas turbine air cooler through the cooling water recovery pipeline; before the gas turbine is ignited, a circulation loop is formed through the condensate water supply pipeline, the gas turbine air cooler water supply pipeline, the gas turbine air cooler, the cooling water return pipeline and the exhaust device 1, and the circulation loop is used to adjust the temperature and flow of the gas turbine air cooler; when the temperature and flow reach the starting conditions, the gas turbine is ignited, the condensate water supply pipeline is closed, the high-pressure feed water pump 8 pipeline is opened, and the gas turbine air cooler is supplied with water through the low-pressure steam drum 7. When the gas turbine load reaches a preset value (for example, 60MW), the return water of the gas turbine air cooler is cut from the exhaust device 1 to the high-pressure steam drum 10.

[0037] In a specific implementation process, a shaft seal heater 6 is provided between the condensate supply pipeline and the low-pressure drum 7; one end of the shaft seal heater 6 is connected to the pipeline between the inlet electric door of the condensate pump 4 and the condensate booster pump 5, and the other end is connected to the low-pressure drum 7; the condensate in the condensate supply pipeline is not heated by the shaft seal heater 6. In the working process, before the engine is ignited, the exhaust device 1, the condensate supply pipeline, the engine air cooler supply pipeline, and the engine air cooler form a cooling water supply loop. Since the condensate that has not passed through the shaft seal heater 6 has a low water temperature and a large flow rate, the condensate is directly supplied to the inlet of the engine air cooler through the condensate recirculation, so that the inlet temperature can easily meet the conditions. After ignition, gradually close the condensate water supply pipeline when the cooling water exits, reduce the condensate recirculation flow, open the regulating valve of the high-pressure water supply pump 8 to supply the gas turbine air cooler, increase the flow of high-pressure water supply to the gas turbine air cooler, and slowly switch the water supply to the gas turbine air cooler from condensate to the low-pressure steam drum 7, reduce the damage to the high-pressure water supply pump 8 pipeline due to temperature and pressure, and also greatly reduce the water change of the exhaust device 1.

[0038] Since the water supply process is carried out in steps, first, the parameters of the gas air cooler are adjusted to the target temperature and flow rate through the condensate that has not passed through the shaft seal heater 6, and then water is supplied to it through the low-pressure steam drum 7. The water supply from the low-pressure steam drum 7 gradually replaces the condensate supply, thereby ensuring that the fluctuation range of the water temperature in the pipeline of the high-pressure water supply pump 8 is small, and also avoiding a large amount of water change in the exhaust device 1, saving water resources. At the same time, it reduces the temperature difference fluctuation of the high-pressure water supply pump 8 and increases the service life of the high-pressure water supply pump 8.

[0039] Among them, the condensate water supply pipeline includes: a condensate water pre-pump 2, an iron removal filter 3, a condensate water pump 4, a condensate water booster pump 5 and a valve; one end of the condensate water pre-pump 2 is connected to the exhaust device 1, and the other end is connected to the gas turbine air cooler water supply pipeline through the iron removal filter 3, the condensate water pump 4, the condensate water booster pump 5 and the valve in sequence; the condensate water pre-pump 2, the iron removal filter 3, the condensate water pump 4, the condensate water booster pump 5 and the valve are used to supply condensate to the gas turbine air cooler before the gas turbine is ignited. The valves include: an electric gate 11 at the condensate booster pump inlet, a check valve 12 at the condensate booster pump outlet, an electric gate 13 at the condensate booster pump outlet and an electric regulating valve 14 at the condensate booster pump outlet; the electric gate 11 at the condensate booster pump inlet is arranged between the condensate pump 4 and the condensate booster pump 5, and the check valve 12 at the condensate booster pump outlet, the electric gate 13 at the condensate booster pump outlet and the electric regulating valve 14 at the condensate booster pump outlet are arranged in sequence between the condensate booster pump 5 and the water supply pipeline of the gas turbine air cooler.

[0040] The cooling water return pipeline includes: a high-pressure drum 10 branch and an exhaust device branch; the high-pressure drum branch is used to connect the gas turbine air cooler 9 with the high-pressure drum 10, and the exhaust device branch is used to connect the gas turbine air cooler 9 with the exhaust device 1. The high-pressure drum branch includes: a manual door 22 for the gas turbine air cooler to return to the high-pressure drum inlet, a regulating valve 23 for the gas turbine air cooler to return to the high-pressure drum inlet, a check valve 24 for the gas turbine air cooler to return to the high-pressure drum inlet, and a flow transmitter 31 for the gas turbine air cooler to return to the high-pressure drum; the gas turbine air cooler 9 is connected to the high-pressure drum 10 through the manual door 22 for the gas turbine air cooler to return to the high-pressure drum inlet, the regulating valve 23 for the gas turbine air cooler to return to the high-pressure drum inlet, the check valve 24 for the gas turbine air cooler to return to the high-pressure drum inlet, and the flow transmitter 31 for the gas turbine air cooler to return to the high-pressure drum. The exhaust device branch includes: an electric door 20 in front of the inlet regulating valve of the gas turbine air cooler return steam device, a regulating valve 21 in the inlet regulating valve of the gas turbine air cooler return steam device and a flow meter transmitter 30 of the gas turbine air cooler return steam device; the gas turbine air cooler 9 is connected to the exhaust device 1 in sequence through the electric door 20 in front of the inlet regulating valve of the gas turbine air cooler return steam device, the regulating valve 21 in the inlet regulating valve of the gas turbine air cooler return steam device and the flow meter transmitter 30 of the gas turbine air cooler return steam device.

[0041] The gas turbine air cooler water supply pipeline includes: a gas turbine air cooler main water supply valve 18, a gas turbine air cooler auxiliary water supply valve 19, a gas turbine air cooler water supply flow transmitter 27, a gas turbine air cooler water supply pressure transmitter 28 and a gas turbine air cooler water supply temperature transmitter 29; one end of the gas turbine air cooler main water supply valve 18 and the gas turbine air cooler auxiliary water supply valve 19 connected in parallel are respectively connected to the condensate water supply pipeline and the condensate water supply pipeline, and the other end is connected to the gas turbine air cooler 9 through the gas turbine air cooler water supply flow transmitter 27, the gas turbine air cooler water supply pressure transmitter 28 and the gas turbine air cooler water supply temperature transmitter 29 in turn.

[0042] The high-pressure drum water supply pipeline includes: a high-pressure drum water supply regulating valve 25 and a high-pressure drum water supply electric valve 26; the high-pressure drum 10 is connected to the high-pressure feed water pump pipeline in turn through the high-pressure drum water supply regulating valve 25 and the high-pressure drum water supply electric valve 26. The high-pressure feed water pump pipeline includes a high-pressure feed water pump inlet electric door 15, a high-pressure feed water pump 8 and a high-pressure feed water pump outlet electric door 16.

[0043] The overall workflow is:

[0044] Before the engine is ignited, start the condensate system, i.e. the condensate supply pipeline, open the electric door 11 at the inlet of the condensate booster pump, start the condensate booster pump 5, open the electric door 13 at the outlet of the condensate booster pump, open the main valve 18 and the auxiliary valve 19 for the water supply to the engine air cooler, open the electric door 20 for the exhaust steam return device of the engine air cooler, and adjust the water supply temperature and flow rate of the engine air cooler 9 by adjusting the electric regulating valve 14 at the outlet of the condensate booster pump and the electric door 20 in front of the inlet regulating valve of the exhaust steam return device of the engine air cooler. Then, open the electric door 15 at the inlet of the high-pressure feed water pump, start the high-pressure feed water pump 8, open the electric door 16 at the outlet, close the electric regulating valve 17 from the outlet of the high-pressure feed water pump 8 to the engine air cooler, wait for the conditions to meet the engine start conditions, and click to start after the engine meets the conditions.

[0045] After the engine is ignited, the cooling water from the condensate water supply pipeline of the engine air cooler 9 is slowly withdrawn, the condensate booster pump outlet electric regulating valve 13 is slowly closed, and the high-pressure feed water pump outlet to the engine air cooler water supply electric regulating valve 17 is gradually opened, and the water supply of the engine air cooler 9 is switched from the condensate water supply to the low-pressure drum 7 supply. After the condensate booster pump outlet electric regulating valve 14 is closed, the condensate booster pump outlet electric door 13 is closed, the condensate booster pump 5 is stopped, and the condensate booster pump inlet electric door 11 is closed, the cooling water is withdrawn, and the water supply switching is realized.

[0046] When the gas turbine load is 60MW, the return water of the gas turbine air cooler is cut from the exhaust device 1 to the high-pressure steam drum 10.

[0047] When high-pressure steam drum water supply is needed, open the high-pressure steam drum water supply regulating valve 25, the high-pressure steam drum water supply electric valve 26, the high-pressure feed water pump outlet to the gas-air cooler water supply electric regulating valve 17 and the gas-air cooler water supply pipeline to form a loop, so as to realize direct water supply through the high-pressure steam drum.

[0048] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0049] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water supply system for a gas turbine air cooler, characterized in that: include: Exhaust device, low-pressure steam drum, high-pressure steam drum, gas turbine air cooler, condensate water supply pipeline, gas turbine air cooler water supply pipeline, high-pressure feed water pump pipeline, high-pressure steam drum water supply pipeline and cooling water return pipeline; The exhaust device is connected to the gas turbine air cooler water supply pipeline through the condensate water supply pipeline, the condensate water supply pipeline is also connected to the low-pressure drum, the low-pressure drum is connected to the high-pressure drum water supply pipeline and the gas turbine air cooler water supply pipeline respectively through the high-pressure feed water pump pipeline, the high-pressure drum and the exhaust device are connected to the gas turbine air cooler respectively through the cooling water recovery pipeline; Before the engine is ignited, a circulation loop is formed through the condensate water supply pipeline, the engine air cooler water supply pipeline, the engine air cooler, the cooling water return pipeline and the exhaust device, and the circulation loop is used to adjust the temperature and flow of the engine air cooler; When the temperature and flow rate reach the starting conditions, the engine is ignited, the condensate water supply pipeline is closed, the high-pressure water supply pump pipeline is opened, and water is supplied to the engine air cooler through the low-pressure steam drum.

2. The water supply system for a gas turbine air cooler according to claim 1, characterized in that: Also includes: When the load of the gas turbine reaches a preset value, the return water of the gas turbine air cooler is cut from the exhaust device to the high-pressure steam drum.

3. The water supply system for a gas turbine air cooler according to claim 1, characterized in that: The condensate water supply pipeline includes: a condensate pre-pump, an iron removal filter, a condensate pump, a condensate booster pump and a valve; One end of the condensate pre-pump is connected to the exhaust device, and the other end is connected to the water supply pipeline of the gas turbine air cooler through the iron removal filter, the condensate pump, the condensate booster pump and the valve in sequence; The condensate pre-pump, iron removal filter, condensate pump, condensate booster pump and valve are used to supply condensate to the engine air cooler before the engine is ignited.

4. The water supply system for a combustion engine air cooler according to claim 3, characterized in that: The valves include: an electric door at the inlet of the condensate booster pump, a check valve at the outlet of the condensate booster pump, an electric door at the outlet of the condensate booster pump and an electric regulating valve at the outlet of the condensate booster pump; The condensate booster pump inlet electric door is arranged between the condensate pump and the condensate booster pump, and the condensate booster pump outlet check valve, the condensate booster pump outlet electric door and the condensate booster pump outlet electric regulating valve are sequentially arranged between the condensate booster pump and the gas turbine air cooler water supply pipeline.

5. The water supply system for a combustion engine air cooler according to claim 4, characterized in that: Also included is a shaft seal heater; One end of the shaft seal heater is connected to the pipeline between the condensate pump and the electric door at the inlet of the condensate booster pump, and the other end is connected to the low-pressure drum; The condensate in the condensate supply pipeline is not heated by the shaft seal heater.

6. The water supply system for a gas turbine air cooler according to claim 1, characterized in that: The cooling water return pipeline includes: a high-pressure drum branch and a steam exhaust device branch; The high-pressure steam drum branch is used to connect the gas engine air cooler with the high-pressure steam drum, and the exhaust device branch is used to connect the gas engine air cooler with the exhaust device.

7. The water supply system for a combustion engine air cooler according to claim 6, characterized in that: The high-pressure drum branch includes: a manual door from the gas turbine air cooler back to the high-pressure drum inlet, a regulating valve from the gas turbine air cooler back to the high-pressure drum inlet, a check valve from the gas turbine air cooler back to the high-pressure drum inlet, and a flow transmitter from the gas turbine air cooler back to the high-pressure drum; The gas turbine air cooler is connected to the high-pressure steam drum via the manual door of the gas turbine air cooler return to the high-pressure steam drum inlet, the regulating valve of the gas turbine air cooler return to the high-pressure steam drum inlet, the check valve of the gas turbine air cooler return to the high-pressure steam drum inlet and the gas turbine air cooler return to the high-pressure steam drum flow transmitter in sequence.

8. The water supply system for a combustion engine air cooler according to claim 6, characterized in that: The exhaust device branch includes: an electric door in front of the inlet regulating valve of the gas turbine air cooler exhaust device, the inlet regulating valve of the gas turbine air cooler exhaust device, and a flow meter transmitter of the gas turbine air cooler exhaust device; The gas turbine air cooler is connected to the exhaust device in sequence through the electric door in front of the gas turbine air cooler return and exhaust device inlet regulating valve, the gas turbine air cooler return and exhaust device inlet regulating valve and the gas turbine air cooler return and exhaust device flow meter transmitter.

9. The water supply system for a combustion engine air cooler according to any one of claims 1 to 8, characterized in that: The gas turbine air cooler water supply pipeline includes: a gas turbine air cooler main water supply valve, a gas turbine air cooler auxiliary water supply valve, a gas turbine air cooler water supply flow transmitter, a gas turbine air cooler water supply pressure transmitter and a gas turbine air cooler water supply temperature transmitter; One end of the main water supply valve of the gas turbine air cooler and the auxiliary water supply valve of the gas turbine air cooler after being connected in parallel are respectively connected to the condensate water supply pipeline and the condensate water supply pipeline, and the other end is connected to the gas turbine air cooler through the gas turbine air cooler water supply flow transmitter, the gas turbine air cooler water supply pressure transmitter and the gas turbine air cooler water supply temperature transmitter in sequence.

10. The water supply system for a combustion engine air cooler according to any one of claims 1 to 8, characterized in that: The high-pressure drum water supply pipeline includes: a high-pressure drum water supply regulating valve and a high-pressure drum water supply electric valve; The high-pressure steam drum is connected to the high-pressure water supply pump pipeline through the high-pressure steam drum water supply regulating valve and the high-pressure steam drum water supply electric valve in sequence.

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