Compressed air system of high-temperature gas cooled reactor emergency diesel generating set and operation method thereof

Abstract

The invention relates to the technical field of high-temperature gas cooled reactor emergency systems, and discloses a compressed air system of a high-temperature gas cooled reactor emergency diesel generating set and an operation method of the compressed air system. The compressed air system comprises a plurality of groups of compressed air storage parts which are mounted in parallel; one end of the air supply pipeline is communicated with the compressed air storage part, the other end of the air supply pipeline is communicated with the emergency stop air cylinder, the air supply pipeline is communicated with a pressure stabilizing storage part, a first control valve is installed on the air supply pipeline at the upstream of the pressure stabilizing storage part, a second control valve is installed on the air supply pipeline at the downstream of the pressure stabilizing storage part, and a pressure reducing valve is installed on the air supply pipeline at the upstream of the first control valve; one end of the auxiliary pipeline is communicated with the air supply pipeline at the upstream of the first control valve, the other end of the auxiliary pipeline is communicated with the air supply pipeline at the downstream of the second control valve, and a third control valve is mounted on the auxiliary pipeline. By introducing the pressure stabilizing storage part, the auxiliary pipelines connected in parallel, the first control valve, the second control valve and the third control valve, the problem of pressure fluctuation caused by reduction of the sealing performance of equipment is relieved.

Description

Technical Field

[0001] This invention relates to the field of high-temperature gas-cooled reactor emergency system technology, specifically to a compressed air system for a high-temperature gas-cooled reactor emergency diesel generator set and its operation method. Background Technology

[0002] The high-temperature gas-cooled reactor emergency diesel generator sets are configured as two independent safe power supply sequences, based on the division of two emergency shutdowns and dedicated safety facility load groups for each reactor. The emergency diesel generator sets are required to start supplying power within a specified time when all normal external power sources are lost, according to the load-bearing procedure requirements, to provide power to the process system loads designated on the emergency bus that are allowed a certain period of power interruption. These process system loads are shared safety auxiliary loads and necessary non-safety loads for both reactors.

[0003] The compressed air system is used for starting and stopping high-temperature gas-cooled reactor emergency diesel generator sets. The shutdown system reduces the compressed air pressure from 3000 kPa to 700 kPa through a pressure reducing valve, which acts on the shutdown cylinder. However, with prolonged use, the sealing performance of some mechanical equipment in the shutdown air circuit deteriorates, leading to a continuous drop in the operating pressure of the compressed air in the shutdown air circuit. This causes frequent triggering of low compressed air pressure alarms in the emergency power generation system, and may even affect the shutdown performance of the emergency power generation system. Summary of the Invention

[0004] In view of this, the present invention provides a compressed air system and its operation method for a high-temperature gas-cooled reactor emergency diesel generator set, in order to solve the problem that the operating pressure of the compressed air system used for unit start-up and shutdown in the existing high-temperature gas-cooled reactor emergency diesel generator set will drop during long-term operation, leading to frequent alarms and even affecting the shutdown performance of the emergency power generation system.

[0005] In a first aspect, the present invention provides a compressed air system for a high-temperature gas-cooled reactor emergency diesel generator set, comprising:

[0006] Multiple sets of compressed air storage units are installed in parallel.

[0007] An air supply pipeline has one end connected to the compressed air storage device and the other end connected to the emergency stop cylinder. A pressure stabilizing device is connected to the air supply pipeline. A first control valve is installed on the air supply pipeline upstream of the pressure stabilizing device, and a second control valve is installed on the air supply pipeline downstream of the pressure stabilizing device. A pressure reducing valve is installed on the air supply pipeline upstream of the first control valve.

[0008] An auxiliary pipeline has one end connected to the gas supply pipeline upstream of the first control valve and the other end connected to the gas supply pipeline downstream of the second control valve. A third control valve is installed on the auxiliary pipeline.

[0009] The compressed air system of the high-temperature gas-cooled reactor emergency diesel generator set ensures a stable supply of compressed air by connecting multiple compressed air reservoirs in parallel to the air supply pipeline. A pressure stabilizing reservoir, auxiliary pipeline, and first, second, and third control valves are added downstream of the pressure reducing valve on the air supply pipeline. High-pressure compressed air output from the compressed air reservoirs is depressurized by the pressure reducing valves and then delivered to the shutdown cylinder to control the shutdown operation. When the air pressure monitoring value in the air supply pipeline is lower than the preset range, the pressure stabilizing reservoir is activated to replenish compressed air into the pipeline; when the air pressure monitoring value in the air supply pipeline is higher than the preset range, the pressure stabilizing reservoir is activated to extract compressed air from the pipeline, ensuring that the air pressure value in the supply pipeline remains stable within the preset range for a long period. If the compressed air system still exceeds or falls below the preset range during operation, the third control valve is activated, the first and second control valves are closed, and the pressure regulating performance of the pressure reducing valve is manually adjusted to bring the air pressure in the supply pipeline back within the preset range for a short period. Then, a leak check is performed on the pressure stabilizing reservoir and related pipelines isolated by the first and second control valves. After the inspection and maintenance are completed, the third control valve is closed, and the first and second control valves are opened to restore the normal operation of the compressed air system. By introducing the pressure stabilizing reservoir and parallel auxiliary pipelines, the pressure fluctuation problem caused by the deterioration of equipment sealing performance is alleviated, and the stability and reliability of system operation are improved. At the same time, the first, second, and third control valves work together to isolate and repair the pressure stabilizing reservoir and related pipelines in sections, achieving rapid maintenance without affecting the overall air supply, thereby ensuring the long-term uninterrupted operation of the compressed air system and ensuring that the emergency power generation system can be shut down stably at any time.

[0010] In one optional embodiment, the system further includes an air compressor, which is connected to the compressed air storage unit via an air supply line, and the air compressor and the compressed air storage unit are arranged in a one-to-one correspondence.

[0011] The air compressor can supply air to the corresponding compressed air storage unit through the air charging pipeline. Each compressed air storage unit is equipped with an independent air compressor, which ensures that the air supply of each compressed air storage unit is independent, improves system redundancy and air supply reliability. If one air compressor or compressed air storage unit fails, the other compressed air storage units can still maintain the air supply pressure normally.

[0012] In one alternative implementation, the parallel inflation lines are connected by a linkage line, and a communication control valve is installed on the linkage line.

[0013] The interlocking control valve controls the opening and closing of the linkage pipeline. When the interlocking control valve is open, air compressors can support each other through the linkage pipeline, balancing the pressure of each compressed air storage unit, preventing excessive load on any single unit, thereby improving the overall operational stability of the system and the utilization rate of the air source. Simultaneously, if an air compressor fails, opening the interlocking control valve allows the corresponding air compressor to pressurize the faulty compressed air storage unit, enabling repair or replacement of the faulty compressor and ensuring stable operation of multiple compressed air storage units at all times.

[0014] In one optional embodiment, a check valve is installed at the outlet end of the air compressor and / or the outlet end of the compressed air reservoir. When the air compressor stops working or the pressure in the compressed air reservoir is higher than the pressure in the charging line, the check valve closes, preventing compressed air from flowing back from the compressed air reservoir or the charging line to the air compressor. This protects the air compressor from backflow gas impact, avoids equipment damage and supply pressure fluctuations caused by gas backflow, and ensures stable system operation.

[0015] In one optional embodiment, a parking control valve is installed on the air supply line between the auxiliary line and the parking cylinder. In case of an emergency stop, the parking control valve is opened, and compressed air flows rapidly through the air supply line to the parking cylinder, actuating it to achieve an emergency shutdown of the diesel generator. This allows the parking control valve to cut off or connect the air supply to the parking cylinder. Simultaneously, the parking control valve isolates the parking cylinder from the air supply line, enabling uninterrupted air supply maintenance of the parking cylinder and ensuring that the parking cylinder retains its emergency operation capability during maintenance.

[0016] In one optional embodiment, a safety relief valve is also connected to the gas supply pipeline, and the safety relief valve is located upstream of the pressure stabilizing reservoir. When the pipeline pressure abnormally rises above a set threshold, the safety relief valve automatically opens to release pressure, preventing high-pressure gas from damaging the pressure stabilizing reservoir and downstream components, enhancing system safety, preventing overpressure accidents, and protecting the stable operation of critical equipment.

[0017] In one optional embodiment, the air supply pipeline is also connected to a pressure monitoring device, which is located downstream of the pressure stabilizing device. The pressure monitoring device monitors the air pressure delivered to the parking cylinder in real time, so as to promptly grasp the air supply pressure status. Once an abnormal pressure is detected, measures can be taken quickly to ensure stable air supply pressure and improve the reliability and safety of system operation.

[0018] Secondly, the present invention also provides a method for operating the compressed air system of a high-temperature gas-cooled reactor emergency diesel generator set. The method using the compressed air system of the high-temperature gas-cooled reactor emergency diesel generator set described in this invention includes the following steps:

[0019] When the emergency diesel generator set needs to be shut down, the first and second control valves are opened and the third control valve is closed. Compressed air is output from the compressed air storage unit, depressurized through the air supply pipeline, and then delivered to the shutdown cylinder.

[0020] When the air pressure monitoring value in the air supply line is lower than the preset range, the pressure stabilizing device is activated to replenish compressed air into the air supply line; when the air pressure monitoring value in the air supply line is higher than the preset range, the pressure stabilizing device is activated to extract compressed air from the air supply line.

[0021] By using pressure stabilizing devices and parallel auxiliary pipelines, along with the first, second, and third control valves, the pressure fluctuation problem caused by the decline in equipment sealing performance is mitigated, thereby improving the stability and reliability of system operation.

[0022] In one optional implementation, when the gas pressure monitoring value in the gas supply pipeline is lower or higher than a preset range for a preset duration, the third control valve is opened and the first and second control valves are closed to isolate the pressure stabilizing device and perform a leak check on the pressure stabilizing device.

[0023] The first, second, and third control valves work together to isolate and repair the pressure stabilizing storage device and related pipelines, enabling rapid maintenance without affecting the overall air supply. This ensures the long-term uninterrupted operation of the compressed air system and guarantees that the emergency power generation system can be shut down stably at any time.

[0024] In one optional implementation, the method further includes: during the maintenance of the parking cylinder, closing the first control valve, the second control valve, and the third control valve; and after the maintenance of the parking cylinder is completed, opening the second control valve and using compressed air from the pressure stabilizing reservoir to check for leaks in the pipeline between the pressure stabilizing reservoir and the parking cylinder. This allows for rapid preliminary airtightness verification without the need for additional air sources, improving maintenance efficiency and operational safety, while avoiding energy waste and frequent equipment start-ups and shutdowns. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the compressed air system of the high-temperature gas-cooled reactor emergency diesel generator set provided in an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached diagram: 1. Air compressor; 2. Compressed air reservoir; 3. Pressure stabilizing reservoir; 4. Shutdown cylinder; 5. Pressure reducing valve; 6. Safety relief valve; 7. Air pressure monitoring device; 8. Shutdown control valve; 9. First control valve; 10. Second control valve; 11. Third control valve; 12. Check valve; 13. Interlocking control valve; 14. Linkage control valve; 15. Air supply control valve; 16. Monitoring control valve. Detailed Implementation

[0028] 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, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] The following is combined with Figure 1 The following describes embodiments of the present invention.

[0030] According to an embodiment of the present invention, a compressed air system for a high-temperature gas-cooled reactor emergency diesel generator set is provided, including a compressed air storage device 2, an air supply pipeline and an auxiliary pipeline.

[0031] Multiple sets of compressed air storage units 2 are installed in parallel. One end of the air supply line is connected to the compressed air storage unit 2, and the other end is connected to the emergency stop cylinder 4. A pressure stabilizing storage unit 3 is connected to the air supply line. A first control valve 9 is installed on the air supply line upstream of the pressure stabilizing storage unit 3, and a second control valve 10 is installed on the air supply line downstream of the pressure stabilizing storage unit 3. A pressure reducing valve 5 is installed on the air supply line upstream of the first control valve 9. An auxiliary line is connected at one end to the air supply line upstream of the first control valve 9 and at the other end to the air supply line downstream of the second control valve 10. A third control valve 11 is installed on the auxiliary line. The first control valve 9, the second control valve 10, and the third control valve 11 are all manual valves. To ensure the sealing stability of the auxiliary line when closed, a pair of third control valves 11 are connected in series.

[0032] The compressed air system of the high-temperature gas-cooled reactor emergency diesel generator set connects multiple compressed air reservoirs 2 in parallel to the air supply pipeline to ensure a stable supply of compressed air. A pressure stabilizing reservoir 3, auxiliary pipelines, and first control valves 9, 10, and 11 are added downstream of the pressure reducing valve 5 on the air supply pipeline. High-pressure compressed air output from the compressed air reservoirs 2 is depressurized by the pressure reducing valves 5 and then delivered to the shutdown cylinder 4 to control the shutdown operation. When the air pressure monitoring value in the air supply pipeline is lower than the preset range, the pressure stabilizing reservoir 3 is activated to replenish compressed air into the air supply pipeline; when the air pressure monitoring value in the air supply pipeline is higher than the preset range, the pressure stabilizing reservoir 3 is activated to extract compressed air from the air supply pipeline, ensuring that the air pressure value in the air supply pipeline remains stable within the preset range over a long period. If the compressed air system operates below or exceeds the preset range, the pressure is adjusted manually by opening the third control valve 11, closing the first control valve 9 and the second control valve 10, and manually regulating the pressure-regulating performance of the pressure-reducing valve 5 to bring the air pressure in the supply pipeline within the preset range for a short period. Then, a leak check is performed on the pressure-stabilizing reservoir 3 and related pipelines isolated by the first control valve 9 and the second control valve 10. After the inspection and maintenance are completed, the third control valve 11 is closed, and the first control valve 9 and the second control valve 10 are opened to restore the normal operation of the compressed air system.

[0033] By introducing the pressure stabilizing reservoir 3 and parallel auxiliary pipelines, the pressure fluctuation problem caused by the decline in equipment sealing performance is alleviated, thereby improving the stability and reliability of system operation. At the same time, the first control valve 9, the second control valve 10 and the third control valve 11 work together to isolate and repair the pressure stabilizing reservoir 3 and related pipelines in sections, enabling rapid maintenance without affecting the overall air supply. This ensures the long-term uninterrupted operation of the compressed air system and, consequently, ensures that the emergency power generation system can be shut down stably at any time.

[0034] In one embodiment, the system further includes an air compressor 1, which is connected to a compressed air storage unit 2 via an air supply line, and the air compressor 1 and the compressed air storage unit 2 are arranged in a one-to-one correspondence.

[0035] Air compressor 1 can supply air to the corresponding compressed air storage unit 2 through the air charging pipeline. Each compressed air storage unit 2 is equipped with an independent air compressor 1, which ensures that the air supply of each compressed air storage unit 2 is independent, improves system redundancy and air supply reliability. If one air compressor 1 or compressed air storage unit 2 fails, the other compressed air storage units 2 can still maintain the air supply pressure normally.

[0036] Furthermore, the parallel inflation lines are connected by a linkage line, on which a connecting control valve 13 is installed. To facilitate control of the airflow direction within the different inflation lines and the linkage line, a cooperating control valve is installed on the inflation lines upstream and downstream of the linkage line. Both the connecting control valve 13 and the cooperating control valve are manual valves.

[0037] The interlocking control valve 13 controls the opening and closing of the linkage pipeline. When the interlocking control valve 13 is open, the air compressors 1 can support each other through the linkage pipeline, balancing the pressure of each compressed air storage unit 2, preventing excessive load on any one piece of equipment, thereby improving the overall operational stability of the system and the utilization rate of the air source. At the same time, if one of the air compressors 1 fails, by opening the interlocking control valve 13, the air compressor 1 corresponding to another compressed air storage unit 2 can be used to charge the compressed air storage unit 2 that has failed, and then the failed air compressor 1 can be repaired or replaced, ensuring that multiple compressed air storage units 2 can always operate stably at any time.

[0038] In this embodiment, the high-temperature gas-cooled reactor emergency diesel generator set is equipped with two independent vertically mounted compressed air tanks as compressed air storage components 2. Each compressed air tank is equipped with an air compressor 1 to fill the compressed air tank. When the compressed air tank is vented, or when the pressure is lower than 2500 kPa, a pressure signal is fed back to the air compressor 1, causing the air compressor 1 to start automatically and refill the compressed air tank to a pressure of not less than 3000 kPa before automatically stopping. When the compressed air tank pressure is lower than 2300 kPa, an alarm signal is issued. The compressed air system is used for starting and stopping the high-temperature gas-cooled reactor emergency diesel generator set. The compressed air system reduces the compressed air pressure from the compressed air tank from 3000 kPa to 700 kPa through the pressure reducing valve 5, which acts on the shutdown cylinder 4. In this embodiment, the pressure stabilizing storage component 3 is a pressure stabilizing tank, and the compressed air pressure in the pressure stabilizing tank is maintained between 600 kPa and 850 kPa.

[0039] In one embodiment, check valves 12 are installed at the outlet ends of the air compressor 1 and the compressed air reservoir 2. When the air compressor 1 stops working or the pressure in the compressed air reservoir 2 is higher than the pressure in the charging pipeline, the check valve 12 closes, preventing compressed air from flowing back from the compressed air reservoir 2 or the charging pipeline to the air compressor 1. This protects the air compressor 1 from backflow gas impact, avoids equipment damage and supply pressure fluctuations caused by gas backflow, and ensures stable system operation. Simultaneously, to control whether the compressed air reservoir 2 supplies air downstream, each outlet of the compressed air reservoir 2 is equipped with a supply control valve 15, which is also a manual valve.

[0040] In one embodiment, a stop control valve 8 is installed on the air supply line between the auxiliary pipeline and the stop cylinder 4. For ease of remote control, the stop control valve 8 is a solenoid valve. Upon receiving a remote stop command, the stop control valve 8 opens the air supply line, delivering compressed air to the stop cylinder for shutdown. In case of emergency shutdown, the stop control valve 8 opens, and compressed air flows rapidly through the air supply line to the stop cylinder 4, actuating it to achieve an emergency shutdown of the diesel generator. This allows the stop control valve 8 to cut off or connect the air supply to the stop cylinder 4. Simultaneously, the stop control valve 8 isolates the stop cylinder 4 from the air supply line, enabling uninterrupted air supply maintenance of the stop cylinder 4 and ensuring that the stop cylinder 4 retains its emergency operation capability during maintenance.

[0041] In one embodiment, a safety relief valve 6 is connected between the pressure reducing valve 5 and the auxiliary pipeline on the gas supply line. The safety relief valve 6 is located upstream of the pressure stabilizing reservoir 3. When the pipeline pressure abnormally rises above a set threshold, the safety relief valve 6 automatically opens to release pressure. Specifically, it automatically opens to release pressure when the pressure exceeds 860 kPa, preventing high pressure from damaging the shutdown cylinder and preventing high-pressure gas from damaging the pressure stabilizing reservoir 3 and downstream components, thereby enhancing system safety, preventing overpressure accidents, and protecting the stable operation of critical equipment.

[0042] In one embodiment, an air pressure gauge and a pressure transmitter, serving as air pressure monitoring components 7, are also connected to the air supply pipeline for monitoring the circuit pressure locally and remotely, and automatically alarming when the pressure exceeds a set range. To facilitate the maintenance and replacement of the air pressure gauge, a monitoring and control valve 16 is installed on the pipeline connecting the air pressure gauge and the air supply pipeline. The monitoring and control valve 16 is also a manual valve.

[0043] The air pressure monitoring device 7 is located downstream of the pressure stabilizing storage device 3. The air pressure monitoring device 7 monitors the air pressure status delivered to the parking cylinder 4 in real time, so as to grasp the air supply pressure status in a timely manner. Once an abnormal pressure is detected, measures can be taken quickly to ensure the stability of the air supply pressure and improve the reliability and safety of the system operation.

[0044] According to an embodiment of the present invention, in another aspect, a method for operating a compressed air system of a high-temperature gas-cooled reactor emergency diesel generator set is also provided. The method, applying the compressed air system of the high-temperature gas-cooled reactor emergency diesel generator set described in the embodiments of the present invention, includes the following steps:

[0045] When the emergency diesel generator set needs to be shut down, the first control valve 9 and the second control valve 10 are opened, and the third control valve 11 is closed. Compressed air is output from the compressed air reservoir 2, depressurized through the air supply pipeline, and then delivered to the shutdown cylinder 4. When the air pressure monitoring value in the air supply pipeline is lower than the preset range, the pressure stabilizing reservoir 3 is opened to replenish compressed air into the air supply pipeline; when the air pressure monitoring value in the air supply pipeline is higher than the preset range, the pressure stabilizing reservoir 3 is opened to extract compressed air from the air supply pipeline. Specifically, the working pressure of the shutdown cylinder 4 is about 700 kPa, and the preset range of the air pressure in the air supply pipeline is set to 600 kPa to 850 kPa. The pressure reducing capacity of the pressure reducing valve 5 is set to an input air pressure of 3000 kPa and an output air pressure of 700 kPa. The pressure reducing valve 5 reduces the compressed air pressure from 3000 kPa to 700 kPa, which then acts on the shutdown cylinder 4. During long-term operation of the compressed air system, the air pressure output from pressure reducing valve 5 may be lower than 700 kPa. When the air pressure output from pressure reducing valve 5 is lower than 600 kPa, the pressure stabilizing tank 3 automatically engages to replenish the air pressure in the supply pipeline to approximately 700 kPa. During operation of the compressed air system, the air pressure output from pressure reducing valve 5 may be higher than 850 kPa. In this case, the pressure stabilizing tank 3 automatically engages to extract air, reducing the air pressure in the supply pipeline to approximately 700 kPa.

[0046] By cooperating with the pressure stabilizing reservoir 3, the parallel auxiliary pipelines, and the first control valve 9, the second control valve 10, and the third control valve 11, the pressure fluctuation problem caused by the decline in equipment sealing performance is alleviated, thereby improving the stability and reliability of system operation.

[0047] Furthermore, when the air pressure monitoring value in the air supply pipeline is lower or higher than the preset range for a preset duration, the third control valve 11 is opened, and the first control valve 9 and the second control valve 10 are closed to isolate the pressure stabilizing reservoir 3 and perform a leak check on the pressure stabilizing reservoir 3. At this time, by manually adjusting the pressure reducing performance of the pressure reducing valve 5, the air pressure of the compressed air passing through the pressure reducing valve 5 can be stabilized at about 700 kPa for a short time.

[0048] The first control valve 9, the second control valve 10, and the third control valve 11 work together to isolate and repair the pressure stabilizing storage device 3 and related pipelines, enabling rapid maintenance without affecting the overall air supply. This ensures the long-term uninterrupted operation of the compressed air system and guarantees that the emergency power generation system can be shut down stably at any time.

[0049] In one embodiment, the method further includes: during the maintenance of the parking cylinder 4, closing the first control valve 9, the second control valve 10, and the third control valve 11; after the maintenance of the parking cylinder 4 is completed, opening the second control valve 10, and using the compressed air in the pressure stabilizing reservoir 3 to check for leaks in the pipeline between the pressure stabilizing reservoir 3 and the parking cylinder 4. This allows for rapid preliminary airtightness verification without the need for additional air sources, improving maintenance efficiency and operational safety, while avoiding energy waste and frequent equipment start-ups and shutdowns.

[0050] The operating method for the compressed air system of a high-temperature gas-cooled reactor emergency diesel generator set provided by this invention reduces pressure fluctuations caused by the mechanical performance of the equipment by adding a pressure stabilizing tank in the shutdown circuit without reducing the original functions of the compressed air system. Additionally, manual valves and auxiliary pipelines for maintenance are added around the pressure stabilizing tank to facilitate maintenance of any defects. During construction, a section of the pipeline between the pressure reducing valve 5 and the shutdown control valve 8 on the original compressed air supply line of the high-temperature gas-cooled reactor emergency diesel generator set is selected at a location with ample construction space, specifically between the safety relief valve 6 and the air pressure gauge. Four manual valves are added, connected in series in pairs to form two parallel circuits. A pressure stabilizing tank is added between the two manual valves in one of these circuits, thus completing the modification of the compressed air system. This method addresses the insufficient compressed air supply pressure in the shutdown circuit of the high-temperature gas-cooled reactor emergency diesel generator set compressed air system caused by a decline in the mechanical seal performance of the equipment.

[0051] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A compressed air system for a high-temperature gas-cooled reactor emergency diesel generator set, characterized in that, include: Compressed air storage unit (2), multiple sets are installed in parallel; An air supply pipeline is connected at one end to the compressed air storage unit (2) and at the other end to the emergency stop cylinder (4). A pressure stabilizing storage unit (3) is connected to the air supply pipeline. A first control valve (9) is installed on the air supply pipeline upstream of the pressure stabilizing storage unit (3). A second control valve (10) is installed on the air supply pipeline downstream of the pressure stabilizing storage unit (3). A pressure reducing valve (5) is installed on the air supply pipeline upstream of the first control valve (9). An auxiliary pipeline is connected at one end to the gas supply pipeline upstream of the first control valve (9) and at the other end to the gas supply pipeline downstream of the second control valve (10). A third control valve (11) is installed on the auxiliary pipeline.

2. The compressed air system of the high-temperature gas-cooled reactor emergency diesel generator set according to claim 1, characterized in that, It also includes an air compressor (1), which is connected to the compressed air storage unit (2) through an air supply line. The air compressor (1) and the compressed air storage unit (2) are arranged in a one-to-one correspondence.

3. The compressed air system of the high-temperature gas-cooled reactor emergency diesel generator set according to claim 2, characterized in that, The inflation lines connected in parallel are connected by a linkage line, and a communication control valve (13) is installed on the linkage line.

4. The compressed air system for a high-temperature gas-cooled reactor emergency diesel generator set according to claim 2 or 3, characterized in that, A check valve (12) is installed at the outlet end of the air compressor (1) and / or the outlet end of the compressed air storage device (2).

5. The compressed air system for a high-temperature gas-cooled reactor emergency diesel generator set according to any one of claims 1 to 3, characterized in that, A parking control valve (8) is installed on the air supply line between the auxiliary pipeline and the parking cylinder (4).

6. The compressed air system for a high-temperature gas-cooled reactor emergency diesel generator set according to any one of claims 1 to 3, characterized in that, A safety relief valve (6) is also connected to the gas supply pipeline, and the safety relief valve (6) is located upstream of the pressure stabilizing reservoir (3).

7. The compressed air system for a high-temperature gas-cooled reactor emergency diesel generator set according to any one of claims 1 to 3, characterized in that, The gas supply pipeline is also connected to a gas pressure monitoring device (7), which is located downstream of the pressure stabilizing storage device (3).

8. A method for operating the compressed air system of a high-temperature gas-cooled reactor emergency diesel generator set, characterized in that, The compressed air system of the high-temperature gas-cooled reactor emergency diesel generator set according to any one of claims 1 to 7 includes the following steps: When the emergency diesel generator set needs to be shut down, the first control valve (9) and the second control valve (10) are opened, and the third control valve (11) is closed. Compressed air is output from the compressed air storage unit (2), depressurized through the air supply pipeline, and then delivered to the shutdown cylinder (4). When the air pressure monitoring value in the air supply pipeline is lower than the preset range, the pressure stabilizing device (3) is activated to replenish compressed air into the air supply pipeline; when the air pressure monitoring value in the air supply pipeline is higher than the preset range, the pressure stabilizing device (3) is activated to extract compressed air from the air supply pipeline.

9. The operating method of the compressed air system of the high-temperature gas-cooled reactor emergency diesel generator set according to claim 8, characterized in that, When the gas pressure monitoring value in the gas supply pipeline is lower or higher than the preset range for a preset duration, the third control valve (11) is opened and the first control valve (9) and the second control valve (10) are closed to isolate the pressure stabilizing device (3) and to check for leaks in the pressure stabilizing device (3).

10. The method for operating the compressed air system of a high-temperature gas-cooled reactor emergency diesel generator set according to claim 8, characterized in that, Also includes: During the maintenance of the parking cylinder (4), the first control valve (9), the second control valve (10) and the third control valve (11) are closed. After the maintenance of the parking cylinder (4) is completed, the second control valve (10) is opened, and the compressed air in the pressure stabilizing reservoir (3) is used to check for leaks in the pipeline between the pressure stabilizing reservoir (3) and the parking cylinder (4).

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