High-temperature gas cooled reactor primary helium fan frequency converter, nuclear power system and method for reducing conductivity

Abstract

The invention relates to the technical field of high-temperature gas cooled reactor primary helium fans, in particular to a high-temperature gas cooled reactor primary helium fan frequency converter, a nuclear power system and a method for reducing conductivity. A high-temperature gas cooled reactor primary helium fan frequency converter comprises an expansion water tank; the power assembly comprises a conveying pipeline, and fluid is suitable for flowing in the conveying pipeline; the filtering assembly comprises a filtering pipeline, a first valve and a deionization barrel, one end of the conveying pipeline is communicated with the liquid outlet end, the other end of the conveying pipeline is communicated with the filtering pipeline, the other end of the filtering pipeline is communicated with the liquid inlet end of the expansion water tank, and the filtering pipeline is sequentially provided with the first valve and the deionization barrel in the direction from the conveying pipeline to the expansion water tank; the exhaust assembly comprises an exhaust pipeline and an exhaust valve, the exhaust valve is arranged on the exhaust pipeline, and one end of the exhaust pipeline is communicated with the filtering pipeline. The invention provides a high-temperature gas cooled reactor primary helium fan frequency converter, a nuclear power system and a method for reducing conductivity, and aims to solve the problem of siphoning in the process of replacing a deionization barrel.

Description

Technical Field

[0001] The present invention relates to the technical field of main helium blowers for high-temperature gas-cooled reactors, and in particular to a frequency converter for the main helium blower for high-temperature gas-cooled reactors, a nuclear power system, and a method for reducing electrical conductivity. Background Art

[0002] The cooling gas in the primary circuit of the high-temperature gas-cooled reactor is driven by the main helium fan, which runs continuously to export the heat of the core to the steam generator, heating the feed water in the secondary circuit. After being heated, the feed water turns into steam, which drives the steam turbine to do work, and the steam turbine drives the generator to rotate and generate electricity.

[0003] At different power levels, the primary circuit helium pressure varies, and the main helium blower rotates at different speeds. Therefore, the main helium blower must operate continuously at different speeds. A frequency converter drives the motor to maintain a constant speed. A failure of the main helium blower would cause a reactor shutdown, making continuous, safe, and reliable operation of the main helium blower frequency converter essential. Within the frequency converter, the deionization barrel is used to reduce the conductivity of the pure water in the entire circulation pipeline. If the conductivity exceeds 0.5 μS / cm, the deionization barrel and filter must be flushed with deionized water to ensure proper operation. However, with long-term use, even flushing with deionized water may not guarantee proper operation. During the deionization barrel replacement process, siphoning (a physical phenomenon in which fluid flows from a higher-level container to a lower-level container through a closed pipeline, leveraging the difference in liquid level and atmospheric pressure) can occur. Summary of the Invention

[0004] In view of this, the present invention provides a high-temperature gas-cooled reactor main helium blower inverter, a nuclear power system and a method for reducing conductivity to solve the problem that with the long-term use of the deionization barrel, even if the deionization barrel is flushed with desalted water, normal use cannot be guaranteed, and siphoning will occur during the replacement of the deionization barrel.

[0005] In a first aspect, the present invention provides a high-temperature gas-cooled reactor main helium blower frequency converter, comprising:

[0006] An expansion water tank, the expansion water tank comprising a liquid inlet end and a liquid outlet end;

[0007] a power assembly, the power assembly including a delivery pipeline, the delivery pipeline being suitable for flowing a fluid;

[0008] A filter assembly, the filter assembly comprising a filter line, a first valve, and a deionization barrel, one end of the delivery line being connected to the liquid outlet, the other end of the delivery line being connected to the filter line, and the other end of the filter line being connected to the liquid inlet of the expansion water tank, the filter line being provided with a first valve and a deionization barrel in sequence from the delivery line toward the expansion water tank;

[0009] The exhaust assembly includes an exhaust pipeline and an exhaust valve. The exhaust pipeline is provided with an exhaust valve. One end of the exhaust pipeline is connected to the filter pipeline. The connection point between the exhaust pipeline and the filter pipeline is located between the deionization barrel and the expansion water tank.

[0010] During normal use, the first valve is open and the exhaust valve is closed. Fluid flows through the delivery pipeline to the filter pipeline, then through the deionization barrel into the expansion tank, and from there into the delivery pipeline. After a period of use, when replacing the deionization barrel, the first valve is closed to isolate the filter pipeline, the exhaust valve is opened to prevent siphoning, and the deionization barrel is replaced to reduce the fluid's conductivity. Specifically, the fluid is pure water. By providing the exhaust valve, air is allowed to enter the filter pipeline when the deionization barrel is replaced, freeing the filter pipeline from airtightness and eliminating siphoning.

[0011] In an optional embodiment, a three-way valve is further included, wherein the three-way valve connects the filtering pipeline and the delivery pipeline.

[0012] In an optional embodiment, the filter assembly further includes a first filter and a second filter, and the filter pipeline is respectively provided with a first filter and a second filter, the first filter is located between the second filter and the first valve, and the second filter is located between the deionization barrel and the expansion water tank.

[0013] In an optional embodiment, the power assembly further includes a first power pump, a first check valve, a second valve, a third valve, a second power pump, a second check valve, a fourth valve and a fifth valve, and the delivery pipeline includes a first delivery branch and a second delivery branch, the first delivery branch is provided with a second valve, a first power pump, a first check valve and a third valve, and the second delivery branch is provided with a fourth valve, a second power pump, a second check valve and a fifth valve.

[0014] In an optional embodiment, the delivery pipeline includes a liquid inlet branch and a liquid outlet branch, one end of the liquid inlet branch is connected to the expansion water tank, and the other end of the liquid inlet branch is respectively connected to the first delivery branch and the second delivery branch, one end of the liquid outlet branch is connected to the three-way valve, and the other end of the liquid outlet branch is respectively connected to the first delivery branch and the second delivery branch.

[0015] In an optional embodiment, a heat exchange component is further included, which includes a liquid inlet pipeline, a heat exchanger and a liquid outlet pipeline. One end of the liquid inlet pipeline is connected to the filter pipeline, and the other end of the liquid inlet pipeline is connected to the first heat exchanger and the second heat exchanger respectively. One end of the liquid outlet pipeline is connected to the first heat exchanger and the second heat exchanger respectively, and the other end of the liquid outlet branch is connected to the liquid inlet branch.

[0016] In an optional embodiment, a conductivity meter is provided on the liquid inlet pipeline.

[0017] In an optional embodiment, an air cooling component is further included, which includes an air cooling pipeline and an outdoor air cooler. The outdoor air cooler is provided on the air cooling pipeline. One end of the air cooling pipeline is connected to a three-way valve, and the other end of the air cooling pipeline is connected to a filter pipeline.

[0018] In a second aspect, the present invention further provides a nuclear power system, comprising the above-mentioned high-temperature gas-cooled reactor main helium blower inverter.

[0019] In the third aspect, the present invention also provides a method for reducing the conductivity of the main helium blower inverter of a high-temperature gas-cooled reactor. Under normal use, the first valve is opened and the exhaust valve is closed. The fluid reaches the filter pipeline through the delivery pipeline, enters the expansion water tank after passing through the deionization barrel, and then enters the delivery pipeline from the expansion water tank; after a period of use, in the replacement state, the first valve is closed to isolate the filter pipeline, the exhaust valve is opened to prevent siphoning in the filter pipeline, and the deionization barrel is replaced to reduce the conductivity of the fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific 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 any creative work.

[0021] Figure 1 This is a schematic diagram of a main helium blower inverter for a high-temperature gas-cooled reactor according to an embodiment of the present invention.

[0022] Explanation of reference numerals: 1. filter assembly; 101. filter pipeline; 102. first filter; 103. deionization barrel; 104. first valve; 105. second filter; 106. sixth valve; 2. expansion tank; 3. three-way valve; 4. power assembly; 401. delivery pipeline; 4011. liquid outlet branch; 4012. second delivery branch; 4013. first delivery branch; 4014. liquid inlet branch; 402. second valve; 403. first power pump; 404. first check valve; 405. third valve; 406. 6. Fourth valve; 407. Second power pump; 408. Second check valve; 409. Fifth valve; 5. Heat exchange component; 501. Liquid inlet pipeline; 502. First heat exchanger; 5021. First pig iron; 5022. Rectifier-side thyristor; 503. Liquid outlet pipeline; 504. Conductivity meter; 505. Second heat exchanger; 5051. Second pig iron; 5052. Countercurrent-side thyristor; 6. Air-cooling component; 601. Air-cooling pipeline; 602. Outdoor air cooler; 7. Exhaust component; 701. Exhaust pipeline; 702. Exhaust valve. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments 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 those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0024] The following combination Figure 1 , describing embodiments of the present invention.

[0025] According to an embodiment of the present invention, on the one hand, a high-temperature gas-cooled reactor main helium blower inverter is provided, comprising: an expansion water tank 2, comprising a liquid inlet end and a liquid outlet end; a power assembly 4, comprising a delivery pipeline 401, wherein the delivery pipeline 401 is suitable for flowing fluid; a filter assembly 1, comprising a filter pipeline 101, a first valve 104 and a deionization barrel 103, wherein one end of the delivery pipeline 401 is connected to the liquid outlet end, and the other end of the delivery pipeline 401 is connected to the filter pipeline 101, and the filter pipeline 101 is connected to the deionization barrel 103. The other end is connected to the liquid inlet end of the expansion water tank 2, and the filter pipeline 101 is provided with a first valve 104 and a deionization barrel 103 in sequence from the delivery pipeline 401 toward the expansion water tank 2; the exhaust component 7 includes an exhaust pipeline 701 and an exhaust valve 702, and the exhaust pipeline 701 is provided with an exhaust valve 702. One end of the exhaust pipeline 701 is connected to the filter pipeline 101, and the connection point between the exhaust pipeline 701 and the filter pipeline 101 is located between the deionization barrel 103 and the expansion water tank 2.

[0026] Under normal use, the first valve 104 is open and the exhaust valve 702 is closed. The fluid reaches the filter line 101 through the delivery line 401, enters the expansion tank 2 after passing through the deionization barrel 103, and then enters the delivery line 401 from the expansion tank 2. After a period of use, in the replacement state, the first valve 104 is closed to isolate the filter line 101, the exhaust valve 702 is opened to prevent siphoning in the filter line 101, and the deionization barrel 103 is replaced to reduce the conductivity of the fluid. Specifically, the fluid is pure water. By setting the exhaust valve 702, air is allowed to enter the filter line 101 when the deionization barrel 103 is replaced, making the filter line 101 no longer sealed, thereby eliminating the siphoning problem.

[0027] In one embodiment, Figure 1 As shown, a three-way valve 3 is also included, which connects the filter pipeline 101 and the delivery pipeline 401, and controls the connection between the filter pipeline 101 and the delivery pipeline 401 through the three-way valve 3.

[0028] In one embodiment, Figure 1 As shown, the filter assembly 1 further includes a first filter 102 and a second filter 105. The first filter 102 and the second filter 105 are respectively provided on the filter line 101. The first filter 102 is located between the second filter 105 and the first valve 104, and the second filter 105 is located between the deionization barrel 103 and the expansion water tank 2. The first filter 102 is used to remove impurities from the fluid in the filter pipe before entering the deionization barrel 103, and the second filter 105 is used to remove impurities from the fluid in the filter pipe after exiting the deionization barrel 103. That is, the fluid flows through the first filter 102, the deionization barrel 103, and the second filter 105 in sequence, and finally reaches the expansion water tank 2. Figure 1 As shown, a sixth valve 106 is further included. The sixth valve 106 is provided on the filter pipeline 101 . The sixth valve 106 is located between the expansion water tank 2 and the second filter 105 .

[0029] In one embodiment, Figure 1 As shown, the power assembly 4 further includes a first power pump 403, a first check valve, a second valve 402, a third valve 405, a second power pump 407, a second check valve, a fourth valve 406, and a fifth valve 409. The delivery pipeline 401 includes a first delivery branch pipe and a second delivery branch pipe. The first delivery branch pipe is provided with the second valve 402, the first power pump 403, the first check valve, and the third valve 405. The second delivery branch pipe is provided with the fourth valve 406, the second power pump 407, the second check valve, and the fifth valve 409. The first delivery branch pipe and the second delivery branch pipe are provided to serve as a "backup" function, so that only one delivery branch can normally flow fluid, and the first check valve 404 and the second check valve 408 prevent the fluid from flowing in the opposite direction.

[0030] In one embodiment, Figure 1 As shown, the delivery pipeline 401 includes a liquid inlet branch 4014 and a liquid outlet branch 4011. One end of the liquid inlet branch 4014 is connected to the expansion tank 2, and the other end of the liquid inlet branch 4014 is respectively connected to the first delivery branch 4013 and the second delivery branch 4012. One end of the liquid outlet branch 4011 is connected to the three-way valve 3, and the other end of the liquid outlet branch 4011 is respectively connected to the first delivery branch 4013 and the second delivery branch 4012. The fluid from the expansion tank 2 first flows into the liquid inlet branch 4014, then enters the first delivery branch or the second delivery branch, and finally enters the liquid outlet branch 4011 from the first delivery branch or the second delivery branch.

[0031] In one embodiment, Figure 1 As shown, it also includes a heat exchange component 5, which includes a liquid inlet pipeline 501, a first heat exchanger 502, a second heat exchanger 505 and a liquid outlet pipeline 503. One end of the liquid inlet pipeline 501 is connected to the filter pipeline 101, and the other end of the liquid inlet pipeline 501 is connected to the first heat exchanger 502 and the second heat exchanger 505 respectively. One end of the liquid outlet pipeline 503 is connected to the first heat exchanger 502 and the second heat exchanger 505 respectively, and the other end of the liquid outlet branch 4011 is connected to the liquid inlet branch 4014. The fluid flowing into the filter pipeline 101 from the three-way valve 3 will partially move along the filter pipeline 101 and partially enter the liquid inlet pipeline 501, and then flow from the liquid inlet pipeline 501 into the first heat exchanger 502 and the second heat exchanger 505 for distribution. After the first heat exchanger 502 and the second heat exchanger 505 exchange heat with the fluid, the fluid enters the liquid outlet pipeline 503, and is transported from the liquid outlet pipeline 503 to the liquid inlet branch 4014 for further circulation.

[0032] In this embodiment, if Figure 1 As shown, a first heat exchanger 502 and a second heat exchanger 505 are arranged in parallel. The first heat exchanger 502 includes a first pig iron 5021 and a rectifier-side thyristor 5022. After the fluid enters the first pig iron 5021, it contacts the rectifier-side thyristor 5022 and removes heat from the rectifier-side thyristor 5022. The second heat exchanger 505 includes a second pig iron 5051 and a reverse-flow thyristor 5052. After the fluid enters the second pig iron 5051, it contacts the reverse-flow thyristor 5052 and removes heat from the reverse-flow thyristor 5052. Because the fluid directly contacts the high-voltage thyristor, it must have low conductivity to prevent high conductivity from degrading the insulation of the inverter's thyristor and causing a short circuit.

[0033] In this embodiment, if Figure 1As shown, the air-cooling assembly 6 is also included. The air-cooling assembly 6 includes an air-cooling pipeline 601 and an outdoor air-cooling machine 602. The outdoor air-cooling machine 602 is installed on the air-cooling pipeline 601. One end of the air-cooling pipeline 601 is connected to the three-way valve 3, and the other end of the air-cooling pipeline 601 is connected to the filter pipeline 101. The fluid entering the three-way valve 3 from the liquid outlet branch 4011 enters either the filter pipeline 101 or the air-cooling pipeline 601. When the fluid temperature is greater than a first preset temperature but lower than a second preset temperature, the fluid enters the air-cooling pipeline 601 through the three-way valve 3. The main fan of the outdoor air-cooling machine 602 cools the fluid before it flows into the filter pipeline 101. A portion of the cooled fluid flows along the filter pipeline 101, and another portion of the cooled fluid enters the liquid inlet pipeline 501. When the fluid temperature is greater than or equal to the second preset temperature, the auxiliary fan of the outdoor air-cooling machine 602 is activated to cooperate with the main fan to cool the fluid. It should be noted that, in order to measure the temperature of the fluid, a temperature sensor is provided near the three-way valve 3 in the outlet branch 4011 to sense the temperature of the fluid in the outlet branch 4011 .

[0034] A nuclear power system includes the above-mentioned high-temperature gas-cooled reactor main helium blower frequency converter.

[0035] In this embodiment, the first valve 104, the second valve 402, the third valve 405, the fourth valve 406, the fifth valve 409, the sixth valve 106, the three-way valve 3, and the exhaust valve 702 are all solenoid-controlled valves. To achieve automatic control, a controller is also included. The controller is connected to the first valve 104, the second valve 402, the third valve 405, the fourth valve 406, the fifth valve 409, the sixth valve 106, the exhaust valve 702, the three-way valve 3, the temperature sensor, the conductivity meter 504, the outdoor air cooler 602, the first power pump 403, the second power pump 407, and other circuits to achieve automatic control.

[0036] A method for reducing the conductivity of a main helium blower inverter of a high-temperature gas-cooled reactor. Under normal use, when the temperature of the fluid in the liquid outlet branch 4011 is lower than a first preset temperature (38°C), the first power pump 403 is started, the second power pump 407 is closed, and the three-way valve 3 connects the liquid outlet branch 4011 and the filter pipeline 101. After entering the filter pipeline 101, a portion of the fluid moves along the filter pipeline 101 for filtration, and the other half enters the liquid inlet pipeline 501 and is cooled by the heat exchanger 502, thereby realizing fluid circulation; when the temperature of the fluid in the liquid outlet branch 4011 is higher than or equal to the first preset temperature (38°C) and lower than the second preset temperature (44°C), the first power pump 403 is started, the second power pump 407 is closed, and the three-way valve 3 connects the liquid outlet branch 4011 and the air-cooling pipeline 601. After entering the air-cooling pipeline 601, the fluid is cooled by the outdoor air cooler 602 (only the main fan of the outdoor air cooler 602 is started) and then enters the filter pipeline 1 01, after the fluid enters the filter pipe 101, a part of the fluid moves along the filter pipe 101 for filtration, and the other half enters the liquid inlet pipe 501 and exchanges heat through the first heat exchanger 502 and the second heat exchanger 505, thereby realizing the circulation of the fluid; when the temperature of the fluid in the liquid outlet branch 4011 is higher than or equal to the second preset temperature (44°C), the first power pump 403 is started, the second power pump 407 is closed, and the three-way valve 3 connects the liquid outlet branch 4011 and the air cooling pipe 6 01, after entering air-cooling pipeline 601, the fluid is cooled by outdoor air cooler 602 (the auxiliary fan of outdoor air cooler 602 is activated, and the main and auxiliary fans work together to further enhance the cooling capacity of outdoor air cooler 602). It then enters filter pipeline 101. After entering filter pipeline 101, a portion of the fluid flows along filter pipeline 101 for filtration, while the remaining portion enters liquid inlet pipeline 501, where it exchanges heat through first heat exchanger 502 and second heat exchanger 505, completing fluid circulation. If first power pump 403 fails or malfunctions, second power pump 407 is activated to complete the inverter's circulation.

[0037] A method for reducing the conductivity of a main helium blower inverter of a high-temperature gas-cooled reactor, which is in a replacement state after being used for a period of time, comprises the following steps:

[0038] 1) Close the first valve 104 to isolate the filter pipe 101, and open the exhaust valve 702 to prevent siphoning from occurring in the filter pipe 101;

[0039] 2) Place a water bag under the deionization barrel 103 to prevent overflowing water from splashing onto the pump or other electrical equipment when the deionization barrel 103 is removed, causing a short circuit;

[0040] 3) Remove the deionization barrel 103 and replace it with a new one. During the replacement of the deionization barrel 103, the pipe connected to the deionization barrel 103 needs to be blocked;

[0041] 4) Place a water collection bag under the first filter 102, remove the first filter 102, and replace it with a new one;

[0042] 5) Place a water collection bag under the second filter 105, remove the second filter 105, and replace it with a new one;

[0043] 6) Use the vacuum pump and exhaust pipe 701 to extract the gas in the pipeline, close the exhaust valve 702, slowly open the first valve 104, and observe the value of the conductivity meter 504 in real time. If the conductivity increases, keep the first valve 104 slightly open;

[0044] 7) When the conductivity stabilizes below 0.1 μS / cm, fully open the first valve 104;

[0045] 8) Observe for a period of time to ensure that the system operates normally, the conductivity is stable, and there are no leaks in the system.

[0046] In this embodiment, the period of time in step 8) is 20-50 minutes, preferably 40 minutes.

[0047] The high-temperature gas-cooled reactor main helium blower frequency converter provided by the present invention has the following advantages: (1) by providing an exhaust assembly 7, the siphon problem that occurs when replacing the deionization barrel 103 is solved; (2) by providing two power pumps, the entire device is ensured to be in a circulation state at all times; (3) a three-way valve 3 is provided to connect different pipelines when the fluid is at different temperatures to reduce the temperature of the fluid.

[0048] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A high temperature gas-cooled reactor main helium blower inverter, characterized in that: include: An expansion water tank (2), the expansion water tank (2) comprising a liquid inlet end and a liquid outlet end; A power assembly (4), the power assembly (4) comprising a delivery pipeline (401), wherein the delivery pipeline (401) is suitable for flowing fluid; A filter assembly (1), the filter assembly (1) comprising a filter line (101), a first valve (104) and a deionization barrel (103); one end of the delivery line (401) is in communication with a liquid outlet, the other end of the delivery line (401) is in communication with the filter line (101), the other end of the filter line (101) is in communication with a liquid inlet of an expansion water tank (2); the filter line (101) is provided with the first valve (104) and the deionization barrel (103) in sequence from the delivery line (401) toward the expansion water tank (2); The exhaust assembly (7) comprises an exhaust pipeline (701) and an exhaust valve (702), wherein the exhaust pipeline (701) is provided with the exhaust valve (702), one end of the exhaust pipeline (701) is connected to the filter pipeline (101), and the connection point between the exhaust pipeline (701) and the filter pipeline (101) is located between the deionization barrel (103) and the expansion water tank (2).

2. The high temperature gas-cooled reactor main helium blower frequency converter according to claim 1, characterized in that: It also includes a three-way valve (3), wherein the three-way valve (3) connects the filtering pipeline (101) and the delivery pipeline (401).

3. The high temperature gas-cooled reactor main helium blower frequency converter according to claim 2, characterized in that: The filter assembly (1) further comprises a first filter (102) and a second filter (105); the first filter (102) and the second filter (105) are respectively provided on the filter pipeline (101); the first filter (102) is located between the second filter (105) and the first valve (104); and the second filter (105) is located between the deionization barrel (103) and the expansion water tank (2).

4. The high temperature gas-cooled reactor main helium blower frequency converter according to claim 2, characterized in that: The power assembly (4) further comprises a first power pump (403), a first check valve, a second valve (402), a third valve (405), a second power pump (407), a second check valve, a fourth valve (406) and a fifth valve (409); the delivery pipeline (401) comprises a first delivery branch pipe and a second delivery branch pipe; the first delivery branch pipe is provided with the second valve (402), the first power pump (403), the first check valve and the third valve (405); the second delivery branch pipe is provided with the fourth valve (406), the second power pump (407), the second check valve and the fifth valve (409).

5. The high temperature gas-cooled reactor main helium blower frequency converter according to claim 4, characterized in that: The delivery pipeline (401) comprises a liquid inlet branch (4014) and a liquid outlet branch (4011); one end of the liquid inlet branch (4014) is in communication with the expansion water tank (2); the other end of the liquid inlet branch (4014) is in communication with the first delivery branch (4013) and the second delivery branch (4012); one end of the liquid outlet branch (4011) is in communication with the three-way valve (3); the other end of the liquid outlet branch (4011) is in communication with the first delivery branch (4013) and the second delivery branch (4012).

6. The high temperature gas-cooled reactor main helium blower frequency converter according to claim 5, characterized in that: The heat exchange assembly (5) further comprises a liquid inlet pipeline (501), a heat exchanger (502) and a liquid outlet pipeline (503); one end of the liquid inlet pipeline (501) is in communication with the filter pipeline (101); the other end of the liquid inlet pipeline (501) is in communication with the first heat exchanger (502) and the second heat exchanger (505); one end of the liquid outlet pipeline (503) is in communication with the first heat exchanger (502) and the second heat exchanger (505); the other end of the liquid outlet branch (4011) is in communication with the liquid inlet branch (4014).

7. The high temperature gas-cooled reactor main helium blower frequency converter according to claim 6, characterized in that: The liquid inlet pipeline (501) is provided with a conductivity meter (504).

8. The high temperature gas-cooled reactor main helium blower frequency converter according to claim 5, characterized in that: The air cooling system further comprises an air cooling component (6), wherein the air cooling component (6) comprises an air cooling pipeline (601) and an outdoor air cooling machine (602), wherein the outdoor air cooling machine (602) is provided on the air cooling pipeline (601), one end of the air cooling pipeline (601) is connected to the three-way valve (3), and the other end of the air cooling pipeline (601) is connected to the filter pipeline (101).

9. A nuclear power system, characterized in that: The invention comprises the high temperature gas-cooled reactor main helium blower frequency converter according to any one of claims 1 to 8.

10. A method for reducing the electrical conductivity of a main helium blower inverter for a high-temperature gas-cooled reactor, for reducing the electrical conductivity of the main helium blower inverter for a high-temperature gas-cooled reactor according to claim 1, characterized in that: In a normal use state, the first valve (104) is opened and the exhaust valve (702) is closed, and the fluid reaches the filter pipeline (101) through the delivery pipeline (401), enters the expansion water tank (2) after passing through the deionization barrel (103), and then enters the delivery pipeline (401) from the expansion water tank (2); after a period of use, in a replacement state, the first valve (104) is closed to isolate the filter pipeline (101), the exhaust valve (702) is opened to prevent siphoning in the filter pipeline (101), and the deionization barrel (103) is replaced to reduce the conductivity of the fluid.

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