Hydroelectric generator evaporative cooling medium recovery device

Abstract

The present application belongs to the field of gas recovery, and particularly relates to a water turbine generator evaporative cooling medium recovery device. The present application aims to solve the problem that there is no device for simultaneously recovering the evaporative cooling medium outside the pipeline of the cooling system and the evaporative cooling medium in the pipeline in the prior art. The present application comprises an air supply system, a filtering system, a recovery and treatment system and a pressure relief system. The air supply system is used for sending air into the pit. The filtering system is used for filtering the air, impurities and evaporative cooling medium in the pit. The recovery and treatment system is used for recovering and treating the air, impurities and evaporative cooling medium filtered by the filtering system. The pressure relief system recovers the gaseous evaporative cooling medium in the pipeline of the cooling system. The present application adds the pit air supply system, which rapidly increases the oxygen content at the bottom of the pit and makes the medium recovery faster, so that the staff can enter the pit for maintenance work in time, and the pipeline sealing failure and working medium leakage caused by excessive pressure in the pipeline of the cooling system can be prevented.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of gas recovery, and particularly relates to a water turbine generator evaporative cooling medium recovery device. BACKGROUND

[0002] The current gas recovery device is composed of a gas leakage monitoring device, a collection device, a control device and a treatment device. The recovery process is as follows: using a leak detector, infrared or other spectrometer to detect gas leakage, collecting through a collection device (fan, pump, pipeline connection place setting a leakage guide pipe or being directly in the container), separating and purifying mixed gas, and finally recovering and storing the gas for reuse.

[0003] In the existing evaporative cooling medium recovery device, the original evaporative cooling medium recovery device only exhausts and recovers the gas in the closed space of the container, and does not recover the evaporative cooling medium leaked to the outside space. The shape of the recovery port of the original evaporative cooling medium recovery device is not fully described, and when collecting the mixed gas of evaporative cooling medium and air, air is not timely sent in, which affects the recovery speed and efficiency.

[0004] In the existing other gas recovery device, the existing patent is suitable for recovering natural gas, automobile exhaust gas or sulfur hexafluoride gas leakage, and does not need to condense and liquefy the recovered gas. However, for evaporative cooling medium recovery, a condensing and liquefying device needs to be used, and the original recovery method cannot be directly used.

[0005] Considering the different operating environments of the evaporative cooling water turbine generator and the physical properties of the gaseous evaporative cooling medium, a reasonable collection port and fan position need to be set to ensure sufficient recovery of the evaporative cooling medium. Because the density of gaseous evaporative cooling medium is greater than that of air, the evaporative cooling medium will deposit at the bottom of the generator pit, and if the accumulation is too high, it will cause oxygen deficiency at the bottom of the pit, endangering the safety of workers.

[0006] On the other hand, when the pressure in the cooling system pipeline rises, it will be exhausted through the pressure relief system. If the system gas tightness has a problem, the cooling medium will rapidly leak from the defect point to the outside atmosphere during the pressure rising process. Currently, there is no device on the market that can recover both the evaporative cooling medium leaked into the air in the pit and the evaporative cooling medium in the cooling system pipeline.

[0007] Therefore, the present application provides a water turbine generator evaporative cooling medium recovery device. SUMMARY

[0008] In order to solve the above problems in the prior art, that is, in the prior art, there is no device for simultaneously recovering the evaporative cooling medium outside the pipeline of the cooling system and the evaporative cooling medium in the pipeline. The application provides a water-turbine-generator evaporative cooling medium recovery device.

[0009] The water-turbine-generator evaporative cooling medium recovery device comprises a ventilation system fixed to the wall surface of the machine pit, a filtering system, a recovery and treatment system and a pressure relief system.

[0010] The ventilation system is used for sending air into the machine pit; the filtering system is used for filtering air, impurities and evaporative cooling medium in the machine pit; the recovery and treatment system is used for recovering and treating the air, impurities and evaporative cooling medium filtered by the filtering system; and the pressure relief system is used for recovering the gaseous evaporative cooling medium in the pipeline of the cooling system.

[0011] In some preferred embodiments, the ventilation system comprises a first fan, a ventilation port and a first pipeline.

[0012] The first fan is fixed to the outer surface of the wall surface of the machine pit, the air inlet of the first fan is used for receiving air, the ventilation port is fixed to the inner surface of the wall surface of the machine pit, and the ventilation port is in sealed connection with the first fan and is fixed to the wall surface of the machine pit through the through hole formed in the wall surface of the machine pit.

[0013] In some preferred embodiments, the filtering system comprises a first filter screen, a second filter screen, an oxygen content detection probe, an evaporative cooling medium detection probe, a second fan and a first pipeline.

[0014] The surface of the first filter screen facing the machine pit is fixed to the oxygen content detection probe and the evaporative cooling medium detection probe, the oxygen content detection probe is used for detecting the oxygen content in the machine pit, the evaporative cooling medium detection probe is used for detecting the evaporative cooling medium content in the machine pit, the first filter screen is fixed to the second filter screen, the second filter screen is fixed to the inner surface of the wall surface of the machine pit, the second filter screen is in sealed connection with the air inlet of the second fan through the through hole formed in the wall surface of the machine pit, the second fan is fixed to the outer surface of the wall surface of the machine pit, the air outlet of the second fan is in sealed connection with the first pipeline, and the first pipeline is in sealed connection with the recovery and treatment system.

[0015] In some preferred embodiments, the pressure relief system is connected with a condensing device, and the condensing device comprises a condenser and an equalizing ring pipe.

[0016] The pressure relief system comprises a first electromagnetic valve, a second electromagnetic valve, a second pipeline and a third pipeline.

[0017] The equalizing ring pipe is sealed and connected to one end of the third pipe, and the other end of the third pipe passes through the wall of the pit and is sealed and connected to the recycling system. One end of the condenser is sealed and connected to the equalizing ring pipe, and the other end of the condenser is connected to the cooling system pipeline in the pit.

[0018] A first solenoid valve is installed on the third pipe. The first solenoid valve is used to isolate the gas flow between the pressure equalization ring pipe and the recycling system. The first solenoid valve and the third pipe are symmetrically arranged in two sets along the center of the pit wall. One end of the symmetrically arranged third pipe is sealed and fixed to the pressure equalization ring pipe and connected to it. The other end of the symmetrically arranged third pipe is sealed and fixed to the symmetrically arranged recycling system and connected to it.

[0019] The third pipe is sealed and connected to one end of the second pipe, and the other end of the second pipe is sealed and connected to the symmetrically arranged third pipe. A second solenoid valve is installed in the middle of the second pipe, which is used to isolate gas flow between the two recycling systems. In some preferred embodiments, multiple sets of the first filter screen, the second filter screen, the oxygen content detection probe, the evaporative cooling medium detection probe, and the second fan are evenly arranged circumferentially along the inner surface of the first pipe and the pit wall.

[0020] In some preferred embodiments, the recycling system includes a first condenser, a second condenser, a recycling tank, and an activated carbon layer;

[0021] The first condenser is sealed and connected to the first pipe, the first condenser is connected to the second condenser and the recovery box, and the second condenser is connected to the activated carbon layer.

[0022] In some preferred embodiments, the air supply system, the filtration system, and the recycling system are symmetrically arranged in two groups along the centerline of the pit wall. The filtration system is connected to the two first pipes in the symmetrically arranged filtration system through an isolation electric valve, which is used to isolate the two first pipes.

[0023] In some preferred embodiments, the first condenser and the second condenser are used to cool the evaporative cooling medium, and the recovery tank is used to recover the evaporative cooling medium.

[0024] In some preferred embodiments, the filtration density of the second filter is greater than that of the first filter.

[0025] In some preferred embodiments, the first condenser, the second condenser, the recovery box, and the activated carbon layer are all fixed to the outer shell of the recovery and treatment system, and the outer shell is fixed to the wall of the pit.

[0026] In some preferred embodiments, both the oxygen content detection probe and the evaporative cooling medium detection probe are equipped with a wireless communication module, which enables remote alarm.

[0027] The beneficial effects of this invention are:

[0028] (1) Compared with the original evaporative cooling medium recovery device, this patent adds a pit air supply system, which can rapidly increase the oxygen content at the bottom of the pit and make the medium recovery faster, making it easier for staff to enter the pit in time to carry out maintenance work.

[0029] (2) Install multiple layers of low-mesh stainless steel filter screens at the front end of the collection port to prevent metal residues and sharp objects from damaging the recycling device. Install high-mesh stainless steel filter screens at the rear end of the collection port to perform physical filtration and remove dust and impurities.

[0030] (3) Multi-layer activated carbon is installed at the recycling device. If there is still evaporation cooling medium that has not condensed, it will be adsorbed by the multi-layer activated carbon to prevent the medium from being discharged into the atmosphere.

[0031] (4) The present invention is equipped with two sets of condensation equipment, which can simultaneously realize the recovery of evaporative cooling medium during the exhaust process in the cooling system pipeline and the recovery of evaporative cooling medium leaked in the large space of the pit. This can avoid the cooling effect being affected by excessive pressure in the cooling system pipeline, and at the same time prevent pipeline sealing failure and working medium leakage caused by excessive pressure inside the pipeline. The recovery of evaporative cooling medium leaked in the pit space can also reduce the generator operating cost. Attached Figure Description

[0032] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0033] Figure 1 This is an isometric view of a hydro-generator evaporative cooling medium recovery device according to the present invention;

[0034] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0035] Figure 3 This is a front view of a hydro-generator evaporative cooling medium recovery device according to the present invention;

[0036] Figure 4 This is a flowchart of the working process of a hydro-generator evaporative cooling medium recovery device according to the present invention;

[0037] Figure 5 This is a schematic diagram of the internal connections of the recycling and processing system. Detailed Implementation

[0038] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0039] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] like Figures 1-5 As shown, see Figure 1 The present invention provides a hydro-generator evaporative cooling medium recovery device, which includes an air supply system 2, a filtration system 3, a recovery and treatment system 4 and a pressure relief system 7 fixed to the pit wall 1;

[0041] The air supply system 2 is used to deliver air into the machine pit 5; the filtration system 3 is used to filter the air, impurities and evaporative cooling medium in the machine pit 5; the recovery and processing system 4 is used to recover and process the air, impurities and evaporative cooling medium filtered out by the filtration system 3; and the pressure relief system 7 is used to recover the gaseous evaporative cooling medium in the cooling system pipeline.

[0042] The cooling system piping is installed inside the winding and is used to cool the winding. The cooling system piping is existing technology and will not be described in detail here.

[0043] Preferably, the air supply system 2 includes a first fan 21 and an air outlet 22;

[0044] The first fan 21 is fixed to the outer surface of the pit wall 1. The air inlet of the first fan 21 is used to receive air. The air outlet 22 is fixed to the inner surface of the pit wall 1. The air outlet 22 is sealed and fixed to the first fan 21 through a through hole opened on the pit wall 1.

[0045] Preferred, see Figure 1 , Figure 2 The filtration system 3 includes a first filter screen 31, a second filter screen 32, an oxygen content detection probe 33, an evaporative cooling medium detection probe 34, a second fan 35, and a first pipe 36.

[0046] The surface of the first filter screen 31 facing the pit 5 is fixed to the oxygen content detection probe 33 and the evaporative cooling medium detection probe 34. The oxygen content detection probe 33 is used to detect the oxygen content in the pit 5, and the evaporative cooling medium detection probe 34 is used to detect the evaporative cooling medium content in the pit 5. The first filter screen 31 is fixed to the second filter screen 32, and the second filter screen 32 is fixed to the inner surface of the pit wall 1. The second filter screen 32 is sealed and fixed to the air inlet of the second fan 35 through a through hole opened on the pit wall 1. The second fan 35 is fixed to the outer surface of the pit wall 1, and the air outlet of the second fan 35 is sealed and fixed to the first pipe 36. The first pipe 36 is sealed and fixed to the recycling and treatment system 4.

[0047] The first filter screen 31 is a multi-layer low-mesh stainless steel filter screen, and the second filter screen 32 is a multi-layer high-mesh stainless steel filter screen.

[0048] Preferred, see Figure 1 , Figure 2 , Figure 3 Multiple sets of the first filter screen 31, the second filter screen 32, the oxygen content detection probe 33, the evaporative cooling medium detection probe 34, and the second fan 35 are evenly arranged circumferentially along the inner surface of the first pipe 36 and the pit wall 1.

[0049] In this embodiment, four groups are preferred.

[0050] Preferred, see Figure 5 The recycling system 4 includes a first condensation box 41, a second condensation box 42, a recycling box 43, and an activated carbon layer 44.

[0051] The first condenser 41 is sealed and connected to the first pipe 36. The first condenser 41 is connected to the second condenser 42 and the recovery box 43. The second condenser 42 is connected to the activated carbon layer 44.

[0052] Preferred, see Figure 1 , Figure 3 The air supply system 2, the filtration system 3 and the recycling system 4 are symmetrically arranged in two sets along the center line of the pit wall 1. The filtration system 3 is connected to the two first pipes 36 in the symmetrically arranged filtration system 3 through an isolation electric valve 6. The isolation electric valve 6 is used to isolate the two first pipes 36.

[0053] With symmetrical arrangement, this device has 8 second fans 35 and 2 first fans 21. The two first pipelines 36 are separated into two recovery units by two isolation electric valves 6. Each recovery unit's processor controls 4 second fans 35, 1 first fan 31, one first pipeline 36, and the corresponding oxygen content detection probe 33 and evaporative cooling medium detection probe 34. When both units are operating normally, the isolation electric valves 6 are closed. If one unit fails, the isolation electric valve 6 is opened, and the other unit controls the entire system.

[0054] Preferably, the pressure relief system 7 is connected to the condensing device, which includes a condenser 71 and a pressure equalization ring pipe 72;

[0055] The pressure relief system 7 includes a first solenoid valve 73, a second solenoid valve 74, a second pipeline 75, and a third pipeline 76;

[0056] The pressure equalizing ring pipe 72 is sealed and connected to one end of the third pipe 76. The other end of the third pipe 76 passes through the pit wall 1 and is sealed and connected to the recycling system 4. One end of the condenser 71 is sealed and connected to the pressure equalizing ring pipe 72. The other end of the condenser 71 is connected to the cooling system pipeline in the pit 5.

[0057] A first solenoid valve 73 is installed on the third pipe 76. The first solenoid valve 73 is used to isolate the gas flow between the pressure equalization ring pipe 72 and the recycling system 4. The first solenoid valve 73 and the third pipe 76 are symmetrically arranged in two sets along the center of the pit wall 1. One end of the symmetrically arranged third pipe 76 is sealed and fixed to the pressure equalization ring pipe 72 and connected to it. The other end of the symmetrically arranged third pipe 76 is sealed and fixed to the symmetrically arranged recycling system 4 and connected to it.

[0058] The third pipe 76 is sealed and connected to one end of the second pipe 75, and the other end of the second pipe 75 is sealed and connected to the symmetrically arranged third pipe 76. A second solenoid valve 74 is installed in the middle of the second pipe 75. The second solenoid valve 74 is used to isolate the gas flow between the two recycling systems 4.

[0059] The first solenoid valve 73 and the second solenoid valve 74 can be replaced with manually controlled valves according to actual needs.

[0060] Preferred, see Figure 5 The first condenser 41 and the second condenser 42 are used to cool the evaporative cooling medium, and the recovery tank 43 is used to recover the evaporative cooling medium.

[0061] The recovery tank 43 is sealed and connected to the input end of the pump body, the output end of the pump body is sealed and connected to one end of the fourth pipe, the other end of the fourth pipe is sealed and connected to the equalizing ring pipe 72, and a third solenoid valve is installed on the fourth pipe. The third solenoid valve is used to prevent the liquid evaporation cooling medium in the equalizing ring pipe 72 from flowing back into the recovery tank.

[0062] Preferred, see Figure 2 The filtration density of the second filter screen 32 is greater than that of the first filter screen 31.

[0063] Preferred, see Figure 5 The first condenser 41, the second condenser 42, the recovery box 43, and the activated carbon layer 44 are all fixed to the outer shell of the recovery and treatment system 4, and the outer shell is fixed to the pit wall 1.

[0064] Preferably, both the oxygen content detection probe 33 and the evaporative cooling medium detection probe 34 are equipped with wireless communication modules, which can realize remote alarm.

[0065] See Figures 1-5 The working principle of this invention is as follows: First, it monitors for any leakage of evaporative cooling medium and the amount of leakage. The oxygen concentration and evaporative cooling medium concentration at the bottom of the generator pit are monitored using oxygen content detection probe 33 and evaporative cooling medium detection probe 34. If the oxygen concentration is too low, an alarm is issued on-site and remotely, prohibiting personnel from entering. The recovery process is as follows: The recovery device controller issues a command to close the isolation electric valve 6, and starts the second fan 35 to filter the leaked evaporative cooling medium and air mixture through the first filter screen 31 and the second filter screen 32 into the first pipe 36, and collect it into the recovery and processing system 4. In the recovery and processing system 4, the evaporative cooling medium is liquefied, recovered, and reused. Simultaneously, the first fan 21 is started to send air from the air outlet into the generator pit 5 to increase the oxygen content and accelerate the recovery of the evaporative cooling medium. Personnel can only enter the generator pit to operate once the oxygen content meets the requirements. The above describes the recovery and reuse of evaporative cooling medium leaked into the air in the generator pit 5.

[0066] While the oxygen content detection probe 33 and the evaporative cooling medium detection probe 34 monitor the oxygen concentration and evaporative cooling medium concentration at the bottom of the generator pit, when the operating pressure of the cooling system pipeline in the pit 5, which cools the stator windings, rises to a set value, the first solenoid valve 73 opens, and the gaseous evaporative cooling medium enters the recovery and treatment system 4 for condensation and recovery. After the pressure in the equalizing ring pipe 72 drops to the set value, the first solenoid valve 73 closes. If the recovery and treatment system 4 malfunctions, the first solenoid valve 73 closes. When the pressure in the equalizing ring pipe 72 rises to the set value, the symmetrically arranged first solenoid valve 73 and second solenoid valve 74 open, and the gaseous evaporative cooling medium enters the symmetrically arranged recovery and treatment system 4 for condensation and recovery. After the pressure in the equalizing ring pipe 72 drops to the set value, the first solenoid valve 73 and second solenoid valve 74 close. The standby is achieved by controlling the opening and closing of the first solenoid valve 73 and the second solenoid valve 74. The above content is to recover the gaseous evaporating cooling medium in the cooling system pipeline, to prevent the pipeline from failing due to excessive pressure, and to prevent the cooling effect from being reduced due to excessive pressure in the cooling system pipeline.

[0067] The mixture of evaporative cooling medium and air, after being filtered and impurities removed, enters the first condenser 41 in the recovery system 4. In the first condenser 41, the evaporative cooling medium condenses and liquefies into a liquid, which then enters the recovery tank 43. To ensure sufficient recovery even with significant leakage of the evaporative cooling medium, a multi-stage condensation process is implemented. The mixture after the initial condensation enters the second condenser 42, where the evaporative cooling medium condenses and liquefies into a liquid, which then enters the recovery tank 43. If any evaporative cooling medium remains unrecovered, it is adsorbed by an activated carbon layer 44 to prevent its release into the atmosphere. Finally, the remaining air is discharged.

[0068] The terms “first”, “second”, etc., are used to distinguish similar objects, not to describe or indicate a specific order or sequence.

[0069] The symmetrical arrangement described in this invention can be understood as a mirror arrangement. The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, methods, articles, or apparatus / devices.

[0070] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A device for recovering evaporative cooling medium from a hydro-generator, characterized in that, The device includes an air supply system (2), a filtration system (3), a recycling system (4), and a pressure relief system (7) fixed to the pit wall (1). The air supply system (2) is used to supply air into the machine pit (5); the filtration system (3) is used to filter the air, impurities and evaporative cooling medium in the machine pit (5); the recovery and processing system (4) is used to recover and process the air, impurities and evaporative cooling medium filtered out by the filtration system (3); the pressure relief system (7) is used to recover the gaseous evaporative cooling medium in the cooling system pipeline; the air supply system (2) includes a first fan (21) and an air outlet (22); The first fan (21) is fixed to the outer surface of the pit wall (1), the air inlet of the first fan (21) is used to receive air, the air outlet (22) is fixed to the inner surface of the pit wall (1), and the air outlet (22) is sealed and fixed to the first fan (21) through a through hole opened on the pit wall (1); the filtration system (3) includes a first filter screen (31), a second filter screen (32), an oxygen content detection probe (33), an evaporative cooling medium detection probe (34), a second fan (35), and a first pipe (36); The surface of the first filter screen (31) facing the pit (5) is fixed to the oxygen content detection probe (33) and the evaporative cooling medium detection probe (34). The oxygen content detection probe (33) is used to detect the oxygen content in the pit (5), and the evaporative cooling medium detection probe (34) is used to detect the evaporative cooling medium content in the pit (5). The first filter screen (31) is fixed to the second filter screen (32). The second filter screen (32) is fixed to the inner surface of the pit wall (1). The second filter screen (32) is sealed and fixed to the air inlet of the second fan (35) through the through hole opened on the pit wall (1). The second fan (35) is fixed to the outer surface of the pit wall (1). The air outlet of the second fan (35) is sealed and fixed to the first pipe (36). The first pipe (36) is sealed and fixed to the recycling system (4).

2. The hydro-generator evaporative cooling medium recovery device according to claim 1, characterized in that, The first filter screen (31), the second filter screen (32), the oxygen content detection probe (33), the evaporative cooling medium detection probe (34), and the second fan (35) are uniformly arranged in multiple sets along the inner circumference of the first pipe (36) and the pit wall (1).

3. The device for recovering evaporative cooling medium from a hydro-generator according to claim 2, characterized in that, The recycling system (4) includes a first condenser (41), a second condenser (42), a recycling tank (43), and an activated carbon layer (44). The first condenser (41) is sealed and connected to the first pipe (36), the first condenser (41) is connected to the second condenser (42) and the recovery box (43), and the second condenser (42) is connected to the activated carbon layer (44).

4. The evaporative cooling medium recovery device for a hydro-generator according to claim 3, characterized in that, The air supply system (2), the filtration system (3) and the recycling system (4) are symmetrically arranged in two groups along the center line of the pit wall (1). The filtration system (3) is connected to the two first pipes (36) in the symmetrically arranged filtration system (3) through an isolation electric valve (6). The isolation electric valve (6) is used to isolate the two first pipes (36).

5. The evaporative cooling medium recovery device for a hydro-generator according to claim 4, characterized in that, The pressure relief system (7) is connected to the condensing device, which includes a condenser (71) and a pressure equalization ring (72). The pressure relief system (7) includes a first solenoid valve (73), a second solenoid valve (74), a second pipeline (75), and a third pipeline (76). The equalizing ring pipe (72) is sealed and connected to one end of the third pipe (76), and the other end of the third pipe (76) passes through the pit wall (1) and is sealed and connected to the recycling system (4). One end of the condenser (71) is sealed and connected to the equalizing ring pipe (72), and the other end of the condenser (71) is connected to the cooling system pipeline in the pit (5). A first solenoid valve (73) is installed on the third pipe (76). The first solenoid valve (73) is used to isolate the gas flow between the equalizing ring pipe (72) and the recycling system (4). The first solenoid valve (73) and the third pipe (76) are symmetrically arranged in two sets along the center of the pit wall (1). One end of the symmetrically arranged third pipe (76) is sealed and connected to the equalizing ring pipe (72), and the other end of the symmetrically arranged third pipe (76) is sealed and connected to the symmetrically arranged recycling system (4). The third pipe (76) is sealed and connected to one end of the second pipe (75), and the other end of the second pipe (75) is sealed and connected to the symmetrically arranged third pipe (76). A second solenoid valve (74) is installed in the middle of the second pipe (75). The second solenoid valve (74) is used to isolate the gas flow between the two recycling systems (4).

6. The evaporative cooling medium recovery device for a hydro-generator according to claim 5, characterized in that, The first condenser (41) and the second condenser (42) are used to cool the evaporative cooling medium, and the recovery tank (43) is used to recover the evaporative cooling medium; the filtration density of the second filter (32) is greater than that of the first filter (31).

7. The hydro-generator evaporative cooling medium recovery device according to claim 6, characterized in that, The first condenser (41), the second condenser (42), the recovery box (43), and the activated carbon layer (44) are all fixed to the outer shell of the recovery and treatment system (4), and the outer shell is fixed to the pit wall (1).

8. The hydro-generator evaporative cooling medium recovery device according to claim 7, characterized in that, Both the oxygen content detection probe (33) and the evaporative cooling medium detection probe (34) are equipped with wireless communication modules, which can realize remote alarm.

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