High-temperature and high-pressure steam compressor system

Abstract

The high-temperature and high-pressure steam compressor system comprises a driving mechanism, a compressor, an air inlet pipeline and an exhaust pipeline, one end of the compressor is connected with the driving mechanism, and the compressor is provided with an inlet side and an outlet side; the air inlet pipeline communicates with the inlet side of the compressor and is used for introducing steam to be compressed into the compressor. The exhaust pipeline is communicated with the outlet side of the compressor and is used for exhausting the compressed high-temperature and high-pressure steam; wherein one end of the air inlet pipeline is communicated with a low-temperature low-pressure steam pipeline discharged by the nuclear power plant. According to the compressor system, one end of the air inlet pipeline of the compressor is communicated with the low-temperature and low-pressure steam pipeline discharged by the nuclear power plant, high-temperature and high-pressure steam is obtained after low-temperature and low-pressure steam is subjected to multi-stage compression through the compressor, high-temperature and high-pressure steam parameters meet the high-parameter steam application requirement of the chemical industry, and therefore cleaner energy can be obtained in the chemical industry; therefore, the nuclear power plant not only reuses the heat energy of the low-parameter steam, but also avoids the use of a large amount of circulating cooling water.

Description

Technical Field

[0001] The present invention relates to the technical field of steam compressors, and in particular to a high-temperature and high-pressure steam compressor system. Background Art

[0002] During the power generation process, nuclear power plants generate a large amount of steam, which needs to be cooled and then discharged to the outside. This operation not only wastes heat energy, but also undoubtedly wastes a lot of circulating cooling water during the cooling process. Therefore, recycling the waste heat of steam generated by nuclear power can effectively reduce energy consumption and provide clean energy for industries such as petrochemicals and steel. This is an important direction for the comprehensive utilization of nuclear energy.

[0003] Generally speaking, the high-end demand of the chemical industry is high-parameter steam of 11.5MPa and 530℃. The industrial steam parameters obtained by the heat exchange method used in existing nuclear energy steam supply projects are generally not high, and are generally in a medium or low pressure slightly superheated state, which can only meet general needs and is difficult to meet the higher-end petrochemical industry gas demand.

[0004] Based on this, the inventor of the present application proposes a high-temperature and high-pressure steam compressor system in order to solve the above technical problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the defect in the prior art that the low-temperature and low-pressure steam discharged from nuclear power plants cannot be used for gas consumption in the petrochemical industry, and to provide a high-temperature and high-pressure steam compressor system.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] The present invention provides a high-temperature and high-pressure steam compressor system, which is characterized in that it includes:

[0008] Driving mechanism;

[0009] A compressor, one end of which is connected to the driving mechanism, the compressor having an inlet side and an outlet side;

[0010] an air inlet pipeline, connected to the inlet side of the compressor, and used for introducing the steam to be compressed into the compressor;

[0011] The exhaust pipeline is connected to the outlet side of the compressor and is used to discharge the compressed high-temperature and high-pressure steam; wherein,

[0012] One end of the air intake pipeline is in communication with a low-temperature and low-pressure steam pipeline discharged from the nuclear power plant.

[0013] According to one embodiment of the present invention, the compressor comprises a rotating shaft and a multi-stage impeller arranged on the rotating shaft; wherein,

[0014] The impeller is separately arranged from the rotating shaft and is rotationally connected along the axial direction of the rotating shaft through tooth meshing.

[0015] According to one embodiment of the present invention, the rotating shaft includes a first rotating shaft and a second rotating shaft arranged at an interval, the multi-stage impeller is arranged between the first rotating shaft and the second rotating shaft, and the two ends of the multi-stage impeller are respectively engaged with the first rotating shaft and the second rotating shaft.

[0016] According to one embodiment of the present invention, adjacent impellers are rotationally connected along the axial direction of the rotating shaft by tooth meshing;

[0017] The impeller close to the first rotating shaft or the second rotating shaft is rotationally connected to the first rotating shaft or the second rotating shaft through tooth meshing.

[0018] According to one embodiment of the present invention, a sealer is provided on each of the opposite sides of the compressor;

[0019] The sealer is connected with a sealing air pipe and an exhaust pipe, wherein the sealing air pipe is used to introduce sealing air into the sealer, and the exhaust pipe is used to discharge a mixture of leaked air from the compressor and sealing air;

[0020] in,

[0021] The sealer is in a negative pressure state.

[0022] According to one embodiment of the present invention, the connection position between the exhaust pipe and the sealer is located between the connection position between the sealed air pipe and the sealer and the compressor.

[0023] According to an embodiment of the present invention, the driving mechanism is a motor, and the output shaft of the motor is connected to the rotating shaft of the compressor through a coupling.

[0024] According to one embodiment of the present invention, it further comprises a lubrication system, wherein the lubrication system comprises a plurality of lubrication oil passages, and the lubrication oil passages flow to at least the driving mechanism and the support bearings on both sides of the rotating shaft.

[0025] According to one embodiment of the present invention, a balancing pipeline is further provided between the intake pipeline and the exhaust pipeline, and the balancing pipeline is used to return part of the high-temperature and high-pressure steam in the exhaust pipeline to the intake pipeline;

[0026] The balancing pipeline is provided with a regulating valve for regulating the flow rate of reflux steam.

[0027] According to one embodiment of the present invention, a safety pipeline is provided on the exhaust pipeline, the safety pipeline is connected in parallel with the exhaust pipeline, and the safety pipeline is used to discharge residual steam in the compressor when the compressor stops or fails.

[0028] According to one embodiment of the present invention, a detection component is provided on each of the intake pipeline and the exhaust pipeline for detecting the inlet and outlet steam parameters of the compressor.

[0029] According to one embodiment of the present invention, the parameters of the steam discharged through the exhaust pipeline are: the steam pressure is not less than 11.5 MPa; the steam temperature is not less than 530°C.

[0030] The positive and progressive effects of the present invention are:

[0031] The high-temperature and high-pressure steam compressor system of the present invention has one end of an air intake pipeline of the compressor connected to a low-temperature and low-pressure steam pipeline discharged from a nuclear power plant. The low-temperature and low-pressure steam is compressed in multiple stages by the compressor to obtain high-temperature and high-pressure steam. The parameters of the high-temperature and high-pressure steam meet the high-parameter steam application requirements of the chemical industry, so the chemical industry can also obtain cleaner energy. In this way, the nuclear power plant not only reuses the thermal energy of the low-parameter steam, but also avoids the use of a large amount of circulating cooling water. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0033] Figure 1 It is a structural schematic diagram of a high-temperature and high-pressure steam compressor system of the present invention;

[0034] Figure 2 for Figure 1 Schematic diagram of the matching structure of the rotating shaft and the impeller;

[0035] Figure 3 It is a schematic diagram of the matching structure of adjacent impellers of the present invention;

[0036] Figure 4 It is a schematic diagram of the characteristic curve of the compressor at a speed of the present invention;

[0037] Figure 5 It is a schematic diagram of the characteristic curve of the compressor of the present invention;

[0038] Figure 6 It is a schematic diagram of the cooperation between the detection component and the compressor of the present invention.

[0039] 1. Driving mechanism;

[0040] 2. compressor; 21. rotating shaft; 211. first rotating shaft; 212. second rotating shaft; 22. impeller; 23. sealer; 24. sealing air pipe; 25. exhaust pipe; 26. tie rod;

[0041] 3. Air intake pipe;

[0042] 4. Exhaust pipeline; 41. Balance pipeline; 411. Regulating valve; 42. Safety pipeline; 43. Detection component;

[0043] 5. Lubrication system; 51. Lubrication oil circuit. DETAILED DESCRIPTION

[0044] The present invention is further described below in conjunction with specific embodiments and drawings. More details are elaborated in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in a variety of other ways different from the description herein. Those skilled in the art can make similar generalizations and deductions based on actual application situations without violating the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0046] Please refer to Figures 1 to 6 The present invention proposes a high-temperature and high-pressure steam compressor system, the compressor system includes a driving mechanism 1, a compressor 2, an intake pipeline 3 and an exhaust pipeline 4, one end of the compressor 2 is connected to the driving mechanism 1 for receiving the driving force provided by the driving mechanism 1, and the driving mechanism 1 is used to drive the compressor 2 to operate.

[0047] The compressor 2 has an inlet side and an outlet side. The inlet side is connected to an air intake pipeline 3 , and the air intake pipeline 3 is used to pass the steam to be compressed into the compressor 2 .

[0048] Specifically, one end of the air intake pipeline 3 is connected to the low-temperature and low-pressure steam pipeline discharged from the nuclear power plant. The source of the steam to be compressed comes from the nuclear power plant. The low-temperature and low-pressure steam generated by the nuclear power plant enters the compressor 2 through the air intake pipeline 3, and is driven by the compressor 2 to obtain high-temperature and high-pressure steam after multi-stage compression, so as to increase the usable range of the steam.

[0049] It should be noted that the compressed steam of compressor 2 comes from the low-parameter steam generated by the nuclear power plant, so the steam source is cleaner. Moreover, the parameters of the high-temperature and high-pressure steam obtained after multi-stage compression by compressor 2 meet the gas demand of high-parameter steam in the chemical industry, so the chemical industry can obtain clean high-parameter steam. Therefore, re-compressing and utilizing the low-temperature and low-pressure steam generated by the nuclear power plant can avoid the waste of thermal energy of the low-parameter steam, and will not waste a large amount of circulating cooling water, so that the low-parameter steam generated by the nuclear power plant can be efficiently utilized.

[0050] In one embodiment, the compressor 2 of the present invention adopts a single-shaft compression, that is, a plurality of impellers 22 are sleeved on a rotating shaft 21 , and steam is compressed by the multi-stage impellers 22 on the rotating shaft 21 .

[0051] In some other embodiments, the compressor 2 can also adopt a gear type. When the strength of the gear box and the casing meets the requirements of high parameter steam pressure, the compressor 2 can also be adjusted from a single-axis type to a gear type, which has higher compression efficiency. However, the present invention takes single-axis compression as an example for explanation.

[0052] It should be noted that the specific parameters of the low-parameter steam generated during the power generation process of a nuclear power plant are: steam pressure 4.7MPa, steam temperature 360°C. These steam parameters can be used for civilian steam use, but cannot meet the high parameter requirements of fields such as the chemical industry.

[0053] The compressor system of the present invention receives the low-parameter steam generated in the power generation process of the nuclear power plant and compresses it in multiple stages to obtain high-parameter steam that meets the needs of chemical industry and other fields. In this way, fields with high parameter requirements such as chemical industry can also obtain clean energy, and the low-parameter steam generated in the power generation process of the nuclear power plant can also be efficiently utilized.

[0054] Specifically, the steam parameters discharged from the exhaust pipe 4 after compression by the system of the present invention are: pressure of at least 11.5 MPa, temperature of at least 530° C., and total flow rate of 150 t / h, thus meeting the use requirements of high-parameter steam in chemical industry and the like.

[0055] Please refer to Figure 2 and Figure 3 In one embodiment, the compressor 2 includes a rotating shaft 21 and a multi-stage impeller 22 arranged on the rotating shaft 21. The impeller 22 and the rotating shaft 21 are separately arranged, and the impeller 22 is rotatably connected to the rotating shaft 21 along the axial direction of the rotating shaft 21 through tooth meshing.

[0056] Compared with conventional set rotors, there is no interference fit between the impeller 22 and the rotating shaft 21 of the present invention, which is easier to assemble. The rotating shaft 21 of the present invention relies on the tooth meshing to transmit torque during rotation, which can meet the stable operation of the high-temperature steam compressor 2 at high temperatures, and there will be no loosening between the impeller 22 and the rotating shaft 21 due to high temperature.

[0057] Compared with forged rotating shafts and welded rotating shafts, the present invention does not require complicated processing technology, and thus does not have the problem of large welding deformation. The processing is more convenient and the operation stability is higher.

[0058] Specifically, the rotating shaft 21 includes a first rotating shaft 211 and a second rotating shaft 212 which are spaced apart from each other, and the multi-stage impeller 22 is disposed between the first rotating shaft 211 and the second rotating shaft 212 .

[0059] Reference Figure 3 The adjacent impellers 22 are rotationally connected along the axial direction of the rotating shaft 21 by tooth meshing, and the impeller 22 and the first rotating shaft 211 or the second rotating shaft 212 are also rotationally connected by tooth meshing.

[0060] In this way, the rotation of the rotating shaft 21 transmits the torque to the impeller 22 through the teeth, thereby driving the impeller 22 to rotate.

[0061] The number of impellers 22 may be one or more. When the number of impellers 22 is one, the two opposite sides of the impeller 22 are respectively connected to the first rotating shaft 211 and the second rotating shaft 212 through gear meshing, and the driving mechanism 1 drives the rotating shaft 21 to rotate, and the rotation of the rotating shaft 21 drives the impeller 22 to rotate by means of gear meshing.

[0062] When there are multiple impellers 22, adjacent impellers 22 are rotationally connected via tooth meshing, and the impeller 22 located at the side is rotationally connected to the first rotating shaft 211 or the second rotating shaft 212 via tooth meshing.

[0063] At the same time, a pull rod 26 is provided on the side of the second rotating shaft 212 away from the first rotating shaft 211. The pull rod 26 is sequentially passed through the second rotating shaft 212 and the impeller 22 and at least partially extends into the first rotating shaft 211 to fasten the first rotating shaft 211, the second rotating shaft 212 and the impeller 22 to ensure that the first rotating shaft 211, the second rotating shaft 212 and the impeller 22 are tightly connected.

[0064] That is, the pull rod 26 provides a tensioning force between the first rotating shaft 211 , the second rotating shaft 212 and the impeller 22 , so as to ensure that the driving force of the driving mechanism 1 can be stably transmitted to the impeller 22 .

[0065] The pull rod 26 and the first rotating shaft 211 may be connected by threads, and a locking nut is provided at one end of the pull rod 26 away from the first rotating shaft 211 for locking and limiting the positions of the first rotating shaft 211 , the impeller 22 and the second rotating shaft 212 .

[0066] Reference Figure 1 A sealer 23 is provided on each of the opposite sides of the compressor 2, and a sealing air pipe 24 and an exhaust pipe 25 are connected to the sealer 23. The sealing air pipe 24 is used to introduce sealing air into the sealer 23, and the exhaust pipe 25 is used to discharge the mixed gas of the leaked gas and the sealing air of the compressor 2; wherein, the sealer 23 is in a negative pressure state.

[0067] The driving mechanism 1 drives the impeller 22 of the compressor 2 to rotate at a high speed. The steam entering the compressor 2 increases its pressure and temperature through the high-speed rotating impeller 22 and obtains kinetic energy. The kinetic energy is converted into pressure energy through the action of the diffusion chamber, further increasing the pressure, and high-temperature and high-pressure steam is discharged.

[0068] Due to the speed limit of the impeller 22 of the compressor 2, the pressure ratio of each stage of the impeller 22 is limited. In order to meet the demand for high-parameter steam in the chemical industry, the present invention uses at least six stages of impeller 22 for compression, but the specific number of impellers 22 can be adjusted according to the required steam parameters and is not limited here.

[0069] During the steam compression process, high-pressure steam will flow and leak to the low-pressure area, so a toothed seal 23 is provided in the middle of each stage of the impeller 22 to reduce the leakage between stages.

[0070] At the same time, a sealer 23 is further provided at the two opposite ends of the rotating shaft outside the compressor 2 to prevent high-temperature and high-pressure steam from leaking from the compressor 2 shell to the external space of the compressor 2 and causing potential safety hazards.

[0071] Therefore, the present invention sets a sealing air pipe 24 and an exhaust pipe 25 on the sealer 23. The sealing air pipe 24 is used to introduce sealing air into the sealer 23. The sealing air combines with the gas leaked in the compressor 2 to form a mixed gas. The mixed gas gathers in the sealer 23 and is discharged in time by the exhaust pipe 25, thereby preventing high-temperature and high-pressure steam from directly leaking to the external environment.

[0072] Further, the connection position between the exhaust pipe 25 and the sealer 23 is located between the connection position between the sealing air pipe 24 and the sealer 23 and the compressor 2 .

[0073] The exhaust pipe 25 is arranged between the sealing air pipe 24 and the compressor 2. The sealing air pipe 24 can block the flow path of the leaking gas. Under the extraction action of the exhaust pipe 25, the leaking gas and the sealing gas are mixed and directly brought out of the sealer 23 by the exhaust pipe 25. Because of the suction action of the exhaust pipe 25, the inside of the sealer 23 is in a negative pressure state, which is more conducive to the high-temperature and high-pressure gas to flow toward the exhaust pipe 25 side, which is more conducive to preventing the high-temperature and high-pressure steam from leaking to the atmosphere.

[0074] In one embodiment, the driving mechanism 1 is a motor, and the output shaft of the motor is connected to the rotating shaft 21 of the compressor 2 through a coupling.

[0075] Optionally, when the project has sufficient steam, a driving steam turbine can be used instead of the motor to drive the compressor 2 to operate. This effectively utilizes the excess steam in the nuclear power plant and improves energy utilization. The specific type of driving mechanism 1 is not limited here and can be selected according to actual needs.

[0076] In one embodiment, a lubrication system 5 is further provided on the outside of the compressor 2 . The lubrication system 5 includes a lubrication oil path 51 . The lubrication oil path 51 flows at least to the driving mechanism 1 and the supporting bearings on both sides of the rotating shaft 21 .

[0077] During the operation of the compressor 2, in order to ensure the smooth operation of the shaft, it is necessary to continuously spray lubricating oil on the bearings and gears. Therefore, the motor, gear box and compressor 2 and other components need to be connected to the lubricating oil circuit 51 to ensure the stability of their operation through heat exchange between the lubricating oil and related components.

[0078] In order to control the flow rate and pressure of steam and avoid surge, a balancing line 41 is provided between the exhaust line 4 and the intake line 3, and the balancing line 41 is used to return part of the high-temperature and high-pressure steam in the exhaust pipe 25 to the intake line 3. A regulating valve 411 is also provided on the balancing line 41 to adjust the flow rate of the refluxed steam.

[0079] Surge will disrupt the flow regularity of the medium inside the compressor 2, generate mechanical noise, cause strong vibration of the working parts, and accelerate the damage of bearings and seals. Once surge causes resonance of the pipeline machine and its foundation, it will also cause serious consequences.

[0080] Therefore, the present invention utilizes the balance line 41 to return part of the high-temperature and high-pressure steam in the exhaust line 4 to the intake line 3 to adjust the pressure difference between the inlet and outlet of the compressor 2 .

[0081] It should be noted that in order to prevent high-temperature and high-pressure gas from directly entering the air intake pipe 3 and then directly entering the compressor 2 to cause damage to the compressor 2, a buffer tank and a cooling device are provided on the air intake pipe 3 to provide a stable air intake flow for the compressor 2. The cooling device can be a spray mechanism, which is not limited here.

[0082] In one embodiment, a safety line 42 is provided on the exhaust line 4. The safety line 42 is connected in parallel with the exhaust line 4 and is used to discharge residual steam in the compressor 2 when the compressor 2 stops or fails.

[0083] When the compressor 2 is shut down or fails, some steam that has not been discharged in time will remain in the compressor 2. The remaining steam cannot meet the high parameter requirements of the exhaust pipe 4, so it cannot be discharged through the exhaust pipe 4. If it is directly discharged to the outside air, it will also cause safety hazards. Therefore, a safety pipe 42 is set on the exhaust pipe 4 to discharge the residual steam in the compressor 2 in time when needed.

[0084] After the compressor 2 is designed, it is still necessary to test the compressor 2 , so a detection component 43 may be provided on the intake pipe 3 and the exhaust pipe 4 respectively to detect the inlet and outlet steam parameters of the compressor 2 .

[0085] The detection component 43 includes, but is not limited to, a temperature sensor, a pressure sensor, a flow sensor, etc., which are not limited here, and the type of the detection component 43 can be selected according to the parameters actually required.

[0086] Specific reference Figures 4 to 6 When the compressor 2 is tested, the air inlet pipeline 3 can use low-parameter steam from the nuclear power plant, or directly use air instead, which can be selected according to actual needs.

[0087] The testing process is as follows:

[0088] The first step is to start the drive mechanism 1 and run it at the minimum operating speed for a certain period of time to stabilize the compressor 2 and the ambient temperature before starting the test. The corresponding parameters that need to be recorded are: atmospheric temperature, atmospheric parameters, pressure before the orifice plate, temperature before the orifice plate, orifice pressure difference, compressor 2 intake temperature, compressor 2 intake pressure, compressor 2 exhaust temperature and compressor 2 exhaust pressure, etc.

[0089] Then gradually reduce the opening of the outlet valve, increase the pressure, record multiple sets of data in equal pressure steps, and then calculate the characteristic curve of compressor 2 at a certain speed, for example, Figure 4 .

[0090] The second step is to adjust the speed of the driving mechanism 1, and the speed range is from the minimum operating condition to the maximum operating condition range. Take multiple speeds in turn. After stabilization, repeat the first step to obtain the characteristic curve of the compressor 2 at different speeds.

[0091] The third step is to calculate and integrate the data to obtain a complete compressor 2 performance curve. For example, you can refer to Figure 5 .

[0092] The above method tests the compressor 2, and a single impeller 22 can also be tested to obtain the characteristic curve of each impeller 22, and then the overall performance curve of the compressor 2 is obtained through data conversion calculation. The performance curve of the compressor 2 finally obtained by testing a single impeller 22 is compared with the curve obtained by directly testing the entire compressor 2, providing data support for the subsequent model development of the impeller 22 and the optimization of the fluid flow channel.

[0093] In summary, the high-temperature and high-pressure steam compressor system of the present invention adopts a single-axis six-stage compression and a carbon ring-labyrinth combined sealing design, which reduces the leakage of compressor 2 and returns part of the steam to the system, effectively controlling the energy exchange between the compressor system and the outside world, and improving the steam parameters, so that the compressed steam meets the high parameter requirements of the chemical industry.

[0094] Specifically, one end of the air inlet pipe 3 of the compressor 2 is connected to the low-temperature and low-pressure steam pipeline discharged from the nuclear power plant. The low-temperature and low-pressure steam is compressed in multiple stages by the compressor 2 to obtain high-temperature and high-pressure steam. The high-temperature and high-pressure steam meets the high-parameter steam application requirements of the chemical industry, so the chemical industry can also obtain cleaner energy.

[0095] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "install", "connect", "connect", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0096] The present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or multiple times in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0097] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A high temperature and high pressure steam compressor system, characterized in that: include: Driving mechanism; A compressor, one end of which is connected to the driving mechanism, the compressor having an inlet side and an outlet side; an air inlet pipeline, connected to the inlet side of the compressor, and used for introducing the steam to be compressed into the compressor; The exhaust pipeline is connected to the outlet side of the compressor and is used to discharge the compressed high-temperature and high-pressure steam; wherein, One end of the air intake pipeline is in communication with a low-temperature and low-pressure steam pipeline discharged from the nuclear power plant.

2. The high-temperature and high-pressure steam compressor system according to claim 1, characterized in that: The compressor comprises a rotating shaft and a multi-stage impeller arranged on the rotating shaft; wherein, The impeller is separately arranged from the rotating shaft and is rotationally connected along the axial direction of the rotating shaft through tooth meshing.

3. The high-temperature and high-pressure steam compressor system according to claim 2, characterized in that: The rotating shaft comprises a first rotating shaft and a second rotating shaft which are arranged at an interval, the multi-stage impeller is arranged between the first rotating shaft and the second rotating shaft, and two ends of the multi-stage impeller are respectively meshed with the first rotating shaft and the second rotating shaft.

4. The high-temperature and high-pressure steam compressor system according to claim 3, characterized in that: Adjacent impellers are rotationally connected along the axial direction of the rotating shaft by tooth meshing; The impeller close to the first rotating shaft or the second rotating shaft is rotationally connected to the first rotating shaft or the second rotating shaft through tooth meshing.

5. The high-temperature and high-pressure steam compressor system according to claim 2, characterized in that: A sealer is provided on each of the opposite sides of the compressor; The sealer is connected with a sealing air pipe and an exhaust pipe, wherein the sealing air pipe is used to introduce sealing air into the sealer, and the exhaust pipe is used to discharge a mixture of leakage air from the compressor and sealing air; wherein, The sealer is in a negative pressure state.

6. The high-temperature and high-pressure steam compressor system according to claim 5, characterized in that: The connection position between the exhaust pipe and the sealer is located between the connection position between the sealed air pipe and the sealer and the compressor.

7. The high-temperature and high-pressure steam compressor system according to claim 2, characterized in that: The driving mechanism is a motor, and the output shaft of the motor is connected to the rotating shaft of the compressor through a coupling.

8. The high-temperature and high-pressure steam compressor system according to claim 7, characterized in that: It also includes a lubrication system, which includes a plurality of lubrication oil passages, and the lubrication oil passages flow to at least the driving mechanism and the supporting bearings on both sides of the rotating shaft.

9. The high-temperature and high-pressure steam compressor system according to claim 1, characterized in that: A balance pipeline is also provided between the air intake pipeline and the exhaust pipeline, and the balance pipeline is used to return part of the high-temperature and high-pressure steam in the exhaust pipeline to the air intake pipeline; The balancing pipeline is provided with a regulating valve for regulating the flow rate of reflux steam.

10. The high-temperature and high-pressure steam compressor system according to claim 9, characterized in that: The exhaust pipeline is provided with a safety pipeline, which is connected in parallel with the exhaust pipeline. The safety pipeline is used to discharge the residual steam in the compressor when the compressor stops or fails.

11. The high-temperature and high-pressure steam compressor system according to any one of claims 1 to 10, characterized in that: The air intake pipeline and the exhaust pipeline are each provided with a detection component for detecting the inlet and outlet steam parameters of the compressor.

12. The high-temperature and high-pressure steam compressor system according to any one of claims 1 to 10, characterized in that: The steam parameters discharged through the exhaust pipeline are as follows: the steam pressure is not less than 11.5 MPa; the steam temperature is not less than 530°C.

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