Spray cooling system for gas turbine compressor

Abstract

The invention provides a spray cooling system for a gas turbine compressor, particularly relates to the technical field of cooling of gas turbine equipment, and aims at solving the technical problems that in the prior art, due to nozzle blockage, the cooling efficiency is remarkably reduced, and online maintenance cannot be achieved. The device comprises a sliding rail type nozzle matrix module, the sliding rail type nozzle matrix module is arranged in the gas inlet channel of the gas turbine and matched with access holes formed in the side wall of the gas inlet channel, and the sliding rail type nozzle matrix module can be pulled through the access holes; the supplementary spraying module is detachably connected to the interior of an air inlet channel at the front end of the gas turbine silencer and installed at the position of an upstream manhole of the air inlet channel silencer, and the supplementary spraying module and the sliding rail type nozzle matrix module are arranged in series; the cooperative control system is electrically connected with the sliding rail type nozzle matrix module and the supplementary spraying module. The device can solve the technical problems that in the prior art, due to nozzle blockage, the cooling efficiency is remarkably reduced, and online maintenance cannot be achieved.

Description

Technical Field

[0001] This invention relates to the field of gas turbine equipment cooling technology, and more specifically, to a spray cooling system for a gas turbine compressor. Background Technology

[0002] In the synthetic ammonia production process, the MS5002C gas turbine serves as the core power unit. Its compressor draws in air from the front-end air filter, which is then compressed through a 16-stage axial flow system before being mixed with fuel gas and combusted. The resulting high-temperature gas drives the turbine to perform work. To maintain compressor efficiency, existing technologies typically employ a spray cooling system. This system uses an external pump station to deliver demineralized water at a certain pressure to an atomizing nozzle matrix within the intake duct, utilizing the latent heat of vaporization of the droplets to cool the intake airflow.

[0003] Currently, in spray cooling systems, the nozzle matrix is ​​fixed inside the air intake by welding. Due to the small orifice size of the nozzles, they are prone to clogging during long-term operation due to the deposition and scaling of impurities in the demineralized water. Clogging leads to poor atomization, a significant decrease in cooling capacity, increased intake air temperature, and reduced air density, directly affecting the compressor's intake volume and compression efficiency. Therefore, it is necessary to shut down the system to remove and replace the nozzles. However, the existing nozzle matrix uses a welded fixed structure, and nozzle replacement requires waiting for a major overhaul of the gas turbine and removing a large number of components such as surrounding guide vanes. A single shutdown cycle can last 48-72 hours, and the average number of shutdowns due to nozzle clogging is 3-5 times per year. The direct economic losses caused by each shutdown are huge. In addition, the shutdown maintenance also requires a large investment of manpower.

[0004] Furthermore, while increasing the nozzle orifice diameter can reduce the clogging rate, it also multiplies the diameter of atomized particles, leading to a significant decrease in evaporation efficiency and a deterioration in cooling effect. Additionally, regular online chemical cleaning with citric acid solution to reduce clogging can corrode the compressor blades. Secondly, adding a second set of nozzles directly into the intake duct can exacerbate airflow disturbances due to space constraints, significantly increasing compressor intake unevenness and triggering surge risk. Summary of the Invention

[0005] The purpose of this invention is to provide a spray cooling system for gas turbine compressors, which can solve the technical problems in the prior art, such as nozzle blockage leading to a significant decrease in cooling efficiency and the inability to perform online maintenance.

[0006] The embodiments of the present invention are achieved through the following technical solutions:

[0007] A spray cooling system for a gas turbine compressor includes a sliding-rail nozzle matrix module housed inside the gas turbine intake duct and adapted to inspection holes arranged on the side wall of the intake duct. The sliding-rail nozzle matrix module can be pulled out through the inspection holes. A supplementary spray module is detachably connected to the intake duct at the front end of the gas turbine muffler and installed at the manhole upstream of the muffler. The supplementary spray module and the sliding-rail nozzle matrix module are arranged in series. A coordinated control system is electrically connected to both the sliding-rail nozzle matrix module and the supplementary spray module to regulate the spray volume of the two modules and to switch operation in fault conditions. The sliding-rail nozzle matrix module performs online nozzle replacement through a pulling action. The supplementary spray module at the front end of the muffler starts independently when the sliding-rail nozzle matrix module is under maintenance to maintain the rated load operation of the gas turbine.

[0008] In some embodiments, the slide rail type nozzle matrix module includes: a linear guide rail made of corrosion-resistant metal and fixedly disposed on the inner side of the inspection hole; the surface of the linear guide rail is streamlined and polished to reduce airflow resistance; a mounting slider, T-shaped, which slides in cooperation with the linear guide rail; multiple sets of mounting sliders are provided and arranged at equal intervals on the linear guide rail; the mounting sliders are welded together by fixing rods to form a rigid whole; the outer side of the fixing rods is wrapped with a drag-reducing liner; and a nozzle tube. A pipe clamp is fixedly fitted, and the outer side of the pipe clamp is fixedly connected to the top surface of the mounting slider; a plurality of first internal thread nozzles are arranged on the nozzle tube, and the outer end of the first internal thread nozzle tube extends to the outer side of the inspection hole and is connected to an external pump station through a detachable pipeline; the liquid spraying direction of the first internal thread nozzle is inclined to the air intake direction of the air intake channel; a blind flange is fixedly fitted to the outer side of the nozzle tube and detachably covers the outer end of the inspection hole, and a metal spiral wound gasket is provided between its connecting surface and the outer end face of the inspection hole to form a sealed connection.

[0009] In some embodiments, the slide rail type nozzle matrix module further includes a stroke detection element, which includes an infrared ranging sensor disposed at the end of the linear guide rail, for detecting whether the mounting slider has been reset to the working position.

[0010] In some embodiments, the supplementary spray module includes: a manhole cover adapted to the original manhole structure of the gas turbine intake duct; multiple distribution pipes, vertically fixed in a triangular pattern to the inner side of the manhole cover; the length of the distribution pipes adapted to the installation space of the manhole; multiple second internal thread nozzles, with multiple second internal thread nozzles staggered on each distribution pipe; reinforcing rods disposed between adjacent distribution pipes, the reinforcing rods being arranged in a stepped interval along the distribution pipes, the rods having internal chambers that communicate with the distribution pipes; a second internal thread nozzle also disposed on the reinforcing rod furthest from the manhole cover; and a water supply main pipe disposed on the outer side of the manhole cover, one end of each distribution pipe penetrating to the outer side of the manhole cover and communicating with the water supply main pipe, the outer side of the water supply main pipe having a water inlet.

[0011] In some embodiments, the supplementary spray module further includes: a pressure-resistant sealing strip wrapped around the connection between the distribution pipe and the manhole cover; and a detachable connector disposed on the connection path between the distribution pipe and the main water supply pipe, wherein a pressure-resistant seal is installed inside the detachable connector, and the threaded connection portion of the detachable connector is coated with a sealing material to achieve a high-pressure seal.

[0012] In some embodiments, the supplementary spray module further includes a vibration monitoring element, which is fixedly installed on the reinforcing tie rod and establishes a signal connection with the collaborative control system to monitor the vibration state of the reinforcing tie rod and provide feedback of abnormal signals.

[0013] In some embodiments, the coordinated control system includes a main control unit; multiple sets of temperature monitoring elements disposed in the airflow channel of the intake duct, arranged redundantly, and connected to the main control unit via signal connection; flow monitoring elements disposed in the airflow path of the intake duct and connected to the main control unit via signal connection; and an electromagnetic control component connected to the sliding-rail nozzle matrix module and the supplementary spray module via control connection, for regulating the spray on / off state and spray volume of the two modules; wherein, after receiving signals from the temperature monitoring elements and flow monitoring elements, the main control unit, through the electromagnetic control component, controls the two modules to spray synchronously when the intake air temperature reaches a preset operating condition; and adjusts the spray volume of the supplementary spray module to maintain the gas turbine load when the sliding-rail nozzle matrix module enters maintenance state.

[0014] In some embodiments, the collaborative control system further includes a manual control element electrically connected to the main control unit, which is used to forcibly switch the operating state of the dual modules in the event of a fault or emergency condition of each detection unit in the collaborative control system.

[0015] In some embodiments, the surface of the linear guide is provided with a wear-resistant coating; the mounting slider is made of corrosion-resistant stainless steel, and the fixing rod is welded and fixed to the body of the mounting slider.

[0016] In some embodiments, an aging-resistant sealing gasket is provided at the sealing connection between the manhole cover and the air intake duct. The sealing gasket is in close contact with the sealing surfaces of the cover and the air intake duct, and the material of the sealing gasket is suitable for the operating temperature environment of the air intake duct. The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects: 1. This system adopts a dual-module spray redundancy design, that is, the sliding rail type nozzle matrix module and the front-end supplementary module of the muffler are arranged in series. When the nozzles of the original matrix are blocked, the supplementary module can independently handle the minimum spray volume, avoiding a sharp drop in overall cooling efficiency due to blockage of a single module.

[0017] 2. This system uses the sliding cooperation of linear guide rails and mounting sliders to allow the nozzle matrix to be pulled axially along the air intake to the outside of the inspection hole, so that the nozzles can be replaced without entering the air intake, greatly improving disassembly and maintenance efficiency and effectively reducing economic losses caused by downtime. In addition, the supplementary module is integrated into the manhole cover, which can be effectively combined with the maintenance function of the manhole. Furthermore, the water distribution pipe is connected to the main water supply pipe through a union joint. During maintenance, only the manhole bolts need to be removed to remove the entire module, making the operation simple and convenient.

[0018] 3. This system maintains load through dual-module collaborative operation. Under normal operating conditions, the two modules spray in a certain proportion. Under high-temperature conditions, it automatically switches to full-load operation of the two modules to ensure that the intake air temperature is controlled at 25±2℃. Furthermore, the collaborative control system adjusts the spray ratio of the two modules in real time according to the intake air temperature and flow rate to avoid excessive spray volume leading to droplet accumulation, effectively increasing the minimum load of the system and improving production capacity. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a side view of a spray cooling system for a gas turbine compressor provided in an embodiment of the present invention; Figure 2 A perspective view of the slide rail type nozzle matrix module provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure outside the inspection port provided in an embodiment of the present invention; Figure 4 This is a front view of the slide rail type nozzle matrix module provided in an embodiment of the present invention; Figure 5 This is an internal side view of the slide rail type nozzle matrix module provided in an embodiment of the present invention; Figure 6 for Figure 5 A magnified view of part A in the middle; Figure 7 This is a schematic diagram of the linear guide provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the mounting slider provided in an embodiment of the present invention; Figure 9 This is a schematic diagram of the pipe clamp provided in an embodiment of the present invention; Figure 10 This is a schematic diagram of the blind flange provided in an embodiment of the present invention; Figure 11 This is a front view of the supplementary spray module provided in an embodiment of the present invention; Figure 12 This is a side view of the supplementary spray module provided in an embodiment of the present invention; Figure 13 This is a bottom view of the supplementary spray module provided in the embodiment of the present invention; Figure 14 This is a rear view of the supplementary spray module provided in an embodiment of the present invention.

[0021] Icons: 1. Air intake; 2. Inspection hole; 3. Silencer; 4. Manhole; 5. Linear guide rail; 6. Mounting slider; 7. Fixing rod; 8. Nozzle tube; 9. Pipe clamp; 10. First internal thread nozzle; 11. Blind flange; 12. Metal spiral wound gasket; 13. Stroke detection element; 14. Manhole cover; 15. Distribution pipe; 16. Second internal thread nozzle; 17. Reinforcing tie rod; 18. Main water supply pipe; 19. Water inlet; 21. Pressure-resistant sealing strip; 22. Detachable joint; 23. Vibration monitoring element; 24. Temperature monitoring element; 25. Flow monitoring element; 26. Manual control element; 27. Sealing gasket. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of this invention, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0026] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] Please see Figures 1-14 As shown, the main body of this embodiment is a spray cooling system for a gas turbine compressor, adapted to the intake duct 1 of an MS5002C gas turbine. The system is arranged in series front and rear along the axial direction of the intake duct 1, and shares an external water supply pump station through an external water supply pipeline. The specific layout is as follows: Sliding rail type nozzle matrix module: installed on the upstream section of the air intake duct 1, corresponding to 8 rectangular inspection holes 2 equidistantly opened on the side wall of the air intake duct 1. The sliding rail type nozzle matrix module realizes pull-out online maintenance through the inspection holes 2. Supplementary spray module: Installed downstream of intake duct 1, adapted to the original manhole 4 of intake duct 1, and detachably connected to intake duct 1 by bolts, forming a series spray channel with the sliding rail type nozzle matrix module; Collaborative control system: The main control unit is deployed in the gas turbine control room and is connected to the slide rail nozzle matrix module and the supplementary spray module through shielded cables to realize real-time monitoring, spray volume adjustment and fault switching.

[0028] Furthermore, the sliding nozzle matrix module includes a linear guide rail 5, which is made of 316L stainless steel to resist corrosion from desalinated water. The length of the linear guide rail 5 is adapted to the radial depth of the air intake duct 1. It is fixed to the wall of the air intake duct 1 inside the inspection hole 2 by bolts. A thick stainless steel gasket is placed between the linear guide rail 5 and the wall of the air intake duct 1 to ensure a tight fit.

[0029] In addition, the outer surface of the guide rail is polished to a streamline shape using a grinding wheel. The roughness after polishing is tested by a roughness tester to avoid eddy currents when the airflow passes through the guide rail. The surface of the linear guide rail 5 is electroplated with a hard chrome layer. The thickness of the plating layer is tested by a metallographic microscope to ensure a tight bond with the guide rail body and improve salt spray resistance.

[0030] Secondly, the slider is made of 316L stainless steel and has a T-shaped cross section to slide with the linear guide rail 5. The clearance is checked by a feeler gauge. Four sets of mounting sliders 6 are arranged equidistantly along the axial direction on each linear guide rail 5. The ends of adjacent sliders are connected by stainless steel fixing rods 7. The welding is done by argon arc welding. After welding, it is tested by penetrant testing to ensure that there are no cracks or pores. In addition, a thick polytetrafluoroethylene liner is glued to the outside of the fixing rod 7 with epoxy resin, and the edges of the liner are rounded with an angle grinder to further reduce airflow resistance.

[0031] Furthermore, the nozzle tube 8 is made of seamless 316L stainless steel. A stainless steel pipe clamp 9 is fitted on the outside of the tube body. The pipe clamp 9 is fixed to the top of the mounting slider 6 by bolts. The bolts are pre-tightened to a certain torque to ensure that the nozzle tube 8 does not move radially. Secondly, the nozzle tube 8 has 8 internal threaded holes equidistantly opened in the axial direction. Each threaded hole is used to install the first internal threaded nozzle 10. After the nozzle is tightened, it is calibrated by a torque wrench. The spray direction of the nozzle is at a 45° angle to the air intake direction of the air intake duct 1 and is positioned by an angle gauge to avoid the droplets directly impacting the blades inside the compressor. The outer end of the nozzle tube 8 extends to the outside of the inspection hole 2 and can be connected to the external water supply pipeline through a stainless steel union. A fluororubber O-ring is installed on the inner side of the union to ensure high-pressure sealing.

[0032] Furthermore, the blind flange 11 is made of DN80 stainless steel. An annular groove is opened on the inner side of the blind flange 11, and a metal spiral wound gasket 12 is embedded in the annular groove. The metal spiral wound gasket 12 is made of 316L steel strip and filled with flexible graphite. The blind flange 11 is connected to the flange seat on the outer end face of the inspection hole 2 by 4 sets of stainless steel bolts. The bolts can be coated with anti-loosening adhesive and tightened symmetrically in three stages with a torque wrench to ensure that the sealing effect meets the standard.

[0033] Furthermore, the stroke detection element 13 adopts an OMRONE3Z-LS86 infrared ranging sensor, which is fixed to the end of the linear guide rail 5 and fixed to the wall of the air intake duct 1 by bolts; the detection direction of the infrared ranging sensor is parallel to the axis of the linear guide rail 5 and faces the end face of the mounting slider 6; when the mounting slider 6 is reset to the working position, the sensor detection distance is a preset threshold. If the detection distance is greater than the preset threshold, the mounting slider 6 is not fully reset, the sensor sends a non-reset signal to the collaborative control system, the system triggers an audible and visual alarm, and at the same time cuts off the water supply to the module to avoid seal leakage.

[0034] Furthermore, the supplementary spray module includes a manhole cover 14, which is made of 316L stainless steel. The manhole cover 14 has 18 bolt holes along its circumference, which are aligned with the bolt holes of the original manhole 4 flange of the air intake duct 1. An aging-resistant silicone rubber gasket 27 is placed between the manhole cover 14 and the original manhole 4 flange of the air intake duct 1, and is secured by stainless steel bolts to ensure a reliable seal.

[0035] Furthermore, three seamless 316L stainless steel tubes are used as distribution tubes 15, arranged in an equilateral triangle and vertically welded to the inner side of the manhole cover 14. The welding process uses fillet welding and bottom sealing welding. The welding wire is ER316L. After welding, the tubes are inspected by penetrant testing. The length of the distribution tubes 15 is adapted to the radial depth of the air intake duct 1 to ensure that the end does not touch the inner wall of the air intake duct 1. In addition, a 316L stainless steel pipe is used as the reinforcing tie rod 17. The reinforcing tie rod 17 is arranged in a stepped manner along the axial direction of the distribution pipe 15. The two ends of the reinforcing tie rod 17 are welded and connected to the adjacent distribution pipe 15. The interior of the reinforcing tie rod 17 has a cavity that communicates with the internal flow channel of the distribution pipe 15. An internal threaded hole is opened in the middle of the tie rod furthest from the manhole cover plate 14, and a second internal threaded nozzle 16 is installed to achieve full coverage of the spray area.

[0036] Furthermore, each distribution pipe 15 has 8 internal threaded holes staggered along the axial direction, and a second internal threaded nozzle 16 is installed in each threaded hole. The second internal threaded nozzle 16 has the same specifications as the first internal threaded nozzle 10, so as to achieve uniformity of spare parts. It is worth mentioning that each nozzle can be secured with a metal wire, which can be made of titanium alloy. The wire is wrapped around the connection between the nozzle and the distribution pipe 15 and secured with a tension gauge to prevent the nozzle from loosening due to high-pressure spray.

[0037] Furthermore, a 316L stainless steel main water supply pipe 18 is horizontally installed on the outside of the manhole cover 14, and the main water supply pipe 18 is fixed to the outer wall of the air inlet 1; the outer ends of the three distribution pipes 15 pass through the manhole cover 14 and are connected to the main water supply pipe 18 through a stainless steel detachable connector 22. A fluororubber O-ring is installed on the inner side of the detachable connector 22, and PTFE sealing tape is applied to the threaded connection to ensure no leakage under high pressure; a stainless steel water inlet 19 is welded to one end of the main water supply pipe 18 and connected to an external water supply pump station through a hose.

[0038] Furthermore, ceramic fiber tape is wrapped around the penetration point between the distribution pipe 15 and the manhole cover 14. After wrapping it three times, high-temperature sealant is applied to the outside. The sealant forms a sealing layer to prevent high-temperature airflow from leaking from the penetration point. In addition, the vibration monitoring element 23 uses a vibration sensor, which is fixed in the middle of the reinforcing tie rod 17 of the intermediate distribution pipe 15. The vibration sensor is connected to the collaborative control system through a shielded cable. When the vibration value of the tie rod is detected to be too large, it may be due to abnormal vibration caused by loose tie rod or nozzle blockage. The system will trigger an alarm and automatically adjust the spray volume of the replenishment module to avoid structural damage.

[0039] Furthermore, the main control unit adopts a Siemens S7-1200 PLC, which is installed in the control cabinet in the control room. The protection level of the control cabinet reaches IP54, and it communicates with various sensors and actuators. In addition, the temperature monitoring element 24 adopts a PT100 platinum resistance temperature sensor. Two sets of temperature monitoring elements 24 are arranged as one set to achieve redundancy. The temperature monitoring element 24 is installed in the air intake duct 1 at the corresponding position downstream of the sliding nozzle matrix module. When the main sensor fails, the backup sensor quickly and automatically switches to ensure continuous temperature data acquisition. In addition, the flow monitoring element 25 is a flow meter, which is installed at the inlet of the air intake duct 1 near the corresponding position of the slide rail type nozzle matrix module. The flow meter detects the intake flow in real time, providing a basis for adjusting the spray volume.

[0040] In addition, two-position three-way solenoid valves are installed on the external water supply lines of the slide rail type nozzle matrix module and the external water supply lines of the supplementary module. The solenoid valves are connected to the output of the main control unit through signal cables to control the opening and closing of the pipeline and the spray volume.

[0041] It is worth mentioning that under normal operating conditions, i.e., when the intake air temperature is ≤28℃, the main control unit receives the temperature sensor signal and controls the sliding rail module solenoid valve to open and the supplementary module solenoid valve to close; the spray volume is adjusted according to the corresponding proportion of the intake air volume and fine-tuned in real time through feedback from the flow meter; under high-temperature operating conditions, i.e., when the intake air temperature is >28℃: the main control unit controls all solenoid valves to open synchronously to ensure that the intake air temperature is stable at 25±2℃; under maintenance conditions, i.e. when the sliding rail nozzle matrix module needs to replace the nozzles: the operator closes the sliding rail nozzle matrix module solenoid valve through the main control unit in the control room, and at the same time increases the spray volume of the supplementary module to maintain the rated load operation of the gas turbine; then the blind flange 11 is disconnected from the inspection hole 2, and then the blind flange 11 is pulled out, thereby pulling out the entire nozzle pipe 8 for maintenance; after maintenance is completed, the system resumes the coordinated operation of the two modules.

[0042] In addition, the manual control element 26 includes a stainless steel button box installed near the supplementary module manhole 4, which contains three buttons: system start / stop, module switching, and emergency stop. The buttons are connected to the spare input terminal of the main control unit via cables. It is worth mentioning that if the corresponding sensor malfunctions, the main control unit can trigger a sensor fault alarm. The operator can force the switch to the supplementary module to operate independently via the module switching button in the button box. In addition, a pressure sensor can be added at blind flange 11. When it detects a pressure drop, i.e. a seal leak, the system will automatically close the solenoid valve of the faulty module, open the backup module, and trigger an audible and visual alarm to prompt personnel to carry out maintenance.

[0043] In this system, the sliding nozzle matrix module extends into the air intake 1 through the inspection hole 2 on the side wall of the air intake 1. The first internal thread nozzle 10 on the nozzle tube 8 sprays at an angle along the airflow direction. Its oblique layout avoids the droplets directly impacting the blades. The atomized droplets mix and evaporate with the high-temperature intake air, absorbing heat and reducing the intake air temperature. The module can be pulled out to the outside of the inspection hole 2 without disassembling the overall structure through the sliding cooperation of the linear guide rail 5 and the mounting slider 6, so as to realize the online replacement of the nozzle.

[0044] The supplementary spray module is fixed upstream of the muffler 3 via the manhole cover 14. Multiple distribution pipes 15 extend into the air intake duct 1 in a triangular layout, and their second internal thread nozzles 16 form an all-round spray coverage, forming a series spray path with the sliding rail module. When the sliding rail module is under maintenance, the supplementary module starts independently and sprays continuously through the connection structure between the water supply main pipe 18 and the distribution pipes 15 to ensure that the cooling capacity is not interrupted.

[0045] The two modules share an external pump station for water supply. The spray volume ratio is adjusted through a collaborative control system. Under normal operating conditions, a single module operates; under high-temperature conditions, both modules work together; and under maintenance conditions, a single supplementary module operates, thereby achieving stable control of the intake air temperature.

[0046] In addition, the sliding fit between the mounting slider 6 and the linear guide rail 5 allows the rigid assembly consisting of the nozzle tube 8 and the fixing rod 7 to move axially along the guide rail and be pulled out to the outside of the air intake 1 through the inspection hole 2, so that the clogged nozzle can be replaced without disassembling other parts of the air intake 1; the detachable sealing connection between the blind flange 11 and the inspection hole 2 ensures high airtightness before and after the pull-out.

[0047] In addition, the distribution pipe 15 is connected to the main water supply pipe 18 via a detachable connector 22, and the manhole cover 14 is connected to the air intake 1 via a flange, allowing the module to be disassembled as a whole from the manhole 4, which facilitates regular maintenance of the nozzles and the distribution pipe 15; the stepped layout of the reinforcing tie rod 17 not only enhances the structural rigidity, but also expands the spray range through the internal chamber, thereby improving the cooling uniformity.

[0048] In addition, the temperature monitoring element 24 collects the intake air temperature in real time, the flow monitoring element 25 detects the intake air flow, and the vibration monitoring element 23 and the stroke detection element 13 monitor the structural status. All data are transmitted to the main control unit.

[0049] Dynamic adjustment logic: The main control unit triggers different operating modes based on the intake air temperature, namely normal / high temperature / maintenance, and adjusts the spray on / off and flow ratio of the dual modules through the solenoid valve; when an abnormality is detected, the system automatically alarms and switches to a safe operating mode.

[0050] Manual intervention safeguard: In emergency situations, the module's operating status can be forcibly switched by manually controlling element 26 to avoid system failure caused by sensor malfunction.

[0051] How to use this system 1. System startup phase Preliminary inspection: It was confirmed that the mounting slider 6 of the slide rail module has been reset, that is, the stroke detection element 13 is functioning normally, the detachable connector 22 of the supplementary module is securely connected without leakage, and the sealing gasket 27, sealing tape and other sealing components are intact.

[0052] Start-up control: The system is started through the main control unit of the collaborative control system, and its self-test program automatically detects the status of sensors and solenoid valves; the external water supply pump station is started to fill the dual-module pipeline with water to the working pressure.

[0053] Mode selection: The main control unit automatically selects the operating mode based on the initial intake air temperature: if the temperature is ≤28℃, only the sliding rail nozzle matrix module is activated; if the temperature is >28℃, both modules are activated simultaneously.

[0054] 2. Normal operation phase Real-time adjustment: Temperature monitoring element 24 collects the intake air temperature every certain period of time, and flow monitoring element 25 synchronously feeds back the intake air flow; the main control unit dynamically adjusts the spray volume according to the data to ensure that the intake air temperature is stable within the target range.

[0055] Status monitoring: Vibration monitoring element 23 monitors the vibration of the supplementary module pull rod in real time, and stroke detection element 13 continuously confirms the position of the slider of the slide rail module; abnormal data triggers audible and visual alarms, and the main control unit automatically fine-tunes the spray volume or switches modules.

[0056] 3. Online maintenance phase Switching preparation: The operator initiates a maintenance mode command on the collaborative control system interface. The main control unit automatically closes the solenoid valve of the sliding rail module and increases the spray volume of the supplementary module to maintain cooling capacity.

[0057] Module pull-out: Remove the blind flange 11 of the slide rail module, pull out the blind flange 11 and pull the nozzle pipe 8 to the outside of the inspection hole 2 along the linear guide rail 5 by installing the slider 6, and fix the slider after positioning.

[0058] Nozzle replacement: Loosen the binding structure, unscrew the nozzle to remove the clogged first internal thread nozzle 10, replace with a new nozzle and then re-fix it; check the integrity of components such as pipe clamp 9 and fixing rod 7, and add grease between slider 6 and linear guide 5 if necessary.

[0059] Reset Operation: Push the module back into the intake duct 1 along the guide rail, confirm that the stroke detection element 13 has returned a normal reset, replace the metal spiral wound gasket 12, and reinstall the blind flange 11; end the "maintenance mode" on the control system interface, and the two modules will resume coordinated operation.

[0060] 4. System downtime phase Gradual shutdown: After the gas turbine shuts down, the collaborative control system closes the dual-module solenoid valve after a delay of several minutes, using residual pressure to flush out residual droplets in the pipeline; the external pump station stops supplying water and opens the pipeline drain valve to drain the accumulated water.

[0061] Regular maintenance: Loosen the bolts, remove the manhole cover 14 of the supplementary module, and check the condition of the second internal thread nozzle 16, distribution pipe 15 and sealing strip; clean and lubricate the guide rail and slider of the slide rail module, and replace the aged seals.

[0062] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A spray cooling system for a gas turbine compressor, characterized in that, include: The sliding nozzle matrix module is located inside the gas turbine intake duct (1) and is adapted to the inspection holes (2) arranged on the side wall of the intake duct (1). The sliding nozzle matrix module can be pulled out through the inspection holes (2). The supplementary spray module is detachably connected to the air intake (1) at the front end of the gas turbine silencer (3) and installed at the manhole (4) upstream of the silencer (3) of the air intake (1). The supplementary spray module and the sliding rail nozzle matrix module are arranged in series. The collaborative control system establishes electrical connections with the slide rail nozzle matrix module and the supplementary spray module respectively, and is used to regulate the spray volume of the two modules and realize the operation switching in the fault state. The sliding nozzle matrix module completes the online replacement of nozzles through a pull-out action. The supplementary spray module at the front end of the muffler (3) is started independently when the sliding nozzle matrix module is in maintenance state, so as to maintain the rated load operation of the gas turbine.

2. The spray cooling system for a gas turbine compressor according to claim 1, characterized in that, The slide rail type nozzle matrix module includes: Linear guide (5), the linear guide (5) is made of corrosion-resistant metal material and is fixedly installed on the inner side of the inspection hole (2). The surface of the linear guide (5) is streamlined and polished to reduce airflow resistance. The mounting slider (6) is T-shaped and slides with the linear guide rail (5). Multiple sets of mounting sliders (6) are provided and are arranged at equal intervals on the linear guide rail (5). The mounting sliders (6) are welded together by fixing rods (7) to form a rigid whole. The outside of the fixing rods (7) is covered with a drag-reducing liner. The nozzle tube (8) is fixedly sleeved with a pipe clamp (9) on its outer side. The outer side of the pipe clamp (9) is fixedly connected to the top surface of the mounting slider (6). A plurality of first internal thread nozzles (10) are arranged on the nozzle tube (8). The outer end of the first internal thread nozzle (10) extends to the outer side of the inspection hole (2) and is connected to the external pump station through a detachable pipeline. The liquid spraying direction of the first internal thread nozzle (10) is inclined to the air intake direction of the air intake channel (1). A blind flange (11) is fixedly fitted to the outside of the nozzle tube (8) and can be detachably covered to the outer end of the inspection hole (2). A metal spiral wound gasket (12) is provided between its connecting surface and the outer end face of the inspection hole (2) to form a sealed connection.

3. The spray cooling system for a gas turbine compressor according to claim 2, characterized in that, The slide rail type nozzle matrix module also includes a stroke detection element (13), which includes an infrared ranging sensor, which is located at the end of the linear guide rail (5) and is used to detect whether the mounting slider (6) has been reset to the working position.

4. The spray cooling system for a gas turbine compressor according to claim 1, characterized in that, The supplemental spray module includes: The manhole cover (14) is adapted to the original manhole (4) structure of the gas turbine intake (1); Multiple distribution pipes (15) are vertically fixed in a triangular shape to the inside of the manhole cover plate (14); the length of the distribution pipes (15) is adapted to the installation space of the manhole (4). Multiple second internal thread nozzles (16) are staggered on each of the distribution pipes (15). A reinforcing tie rod (17) is provided between adjacent distribution pipes (15). The reinforcing tie rods (17) are arranged in a stepped manner along the distribution pipes (15). The tie rod has a cavity inside and is connected to the distribution pipe (15). A second internal thread nozzle (16) is also provided on the reinforcing tie rod (17) furthest from the manhole cover plate (14). A water supply main pipe (18) is located on the outside of the manhole cover (14). One end of each of the distribution pipes (15) passes through the outside of the manhole cover (14) and is connected through the water supply main pipe (18). An inlet (19) is provided on the outside of the water supply main pipe (18).

5. A spray cooling system for a gas turbine compressor according to claim 4, characterized in that, The supplemental spray module also includes: Pressure-resistant sealing tape (21) is wrapped around the connection between the distribution pipe (15) and the manhole cover (14); A detachable connector (22) is provided on the connection path between the distribution pipe (15) and the main water supply pipe (18). The detachable connector (22) is equipped with a pressure-resistant seal inside. The threaded connection part of the detachable connector (22) is coated with a sealing material to achieve high-pressure sealing.

6. A spray cooling system for a gas turbine compressor according to claim 4, characterized in that, The supplementary spray module also includes a vibration monitoring element (23), which is fixedly installed on the reinforcing tie rod (17) and establishes a signal connection with the collaborative control system to monitor the vibration state of the reinforcing tie rod (17) and provide feedback on abnormal signals.

7. A spray cooling system for a gas turbine compressor according to claim 1, characterized in that, The collaborative control system includes a main control unit; multiple temperature monitoring elements (24) are arranged in the airflow channel of the air intake (1) in a redundant manner and establish a signal connection with the main control unit; flow monitoring elements (25) are arranged on the airflow path of the air intake (1) and establish a signal connection with the main control unit; and an electromagnetic control component is established with the sliding nozzle matrix module and the supplementary spray module respectively to regulate the spray on / off and spray volume of the two modules. The main control unit receives signals from the temperature monitoring element (24) and the flow monitoring element (25) and then uses an electromagnetic control component to control the dual-module synchronous spraying when the intake temperature reaches the preset operating condition; and adjusts the spray volume of the supplementary spraying module to maintain the gas turbine load when the slide rail nozzle matrix module enters the maintenance state.

8. A spray cooling system for a gas turbine compressor according to claim 7, characterized in that, The collaborative control system also includes a manual control element (26), which is electrically connected to the main control unit and is used to forcibly switch the operating status of the dual modules in the event of a fault or emergency in each detection unit of the collaborative control system.

9. A spray cooling system for a gas turbine compressor according to claim 2, characterized in that, The surface of the linear guide (5) is provided with a wear-resistant coating; the mounting slider (6) is made of corrosion-resistant stainless steel, and the fixing rod (7) is welded and fixed to the body of the mounting slider (6).

10. A spray cooling system for a gas turbine compressor according to claim 4, characterized in that, An aging-resistant sealing gasket (27) is provided at the sealing connection between the manhole cover (14) and the air intake (1). The sealing gasket (27) is in close contact with the sealing surface of the cover and the air intake (1), and the material of the sealing gasket (27) is suitable for the working temperature environment of the air intake (1).

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