Reactor heat supply system

Abstract

The present application relates to the field of reactor heat supply equipment, and particularly provides a reactor heat supply system, which aims to solve the problem of complex structure of the reactor heat supply system, and comprises a hollow shell, an inner shell coaxially arranged with the shell, a coupling assembly, a driving assembly and a steam generator; the inner shell is configured as a first cooling space, and a second cooling space for flowing a second cooling medium is configured between the inner shell and the shell; the coupling assembly has a first channel and a second channel separated therefrom, the first channel flows a first cooling medium, and the first channel is communicated with the first cooling space; the driving assembly is communicated with the second channel to deliver the second cooling medium into the second channel; and the steam generator is communicated with the second channel, wherein the reactor heat supply system of the present application utilizes the cooperation of the coupling assembly and the driving assembly to simplify the complexity of the structure of the reactor heat supply system and improve the safety operation coefficient of the reactor.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of reactor heating equipment, and particularly provides a reactor heating system. BACKGROUND

[0002] A three-loop cooling system is generally used in a nuclear reactor heating and steam supply system, and an intermediate loop is used as an isolation to ensure the radioactivity safety of a user end medium. At present, water or steam is generally used as a cooling medium in all loops in the nuclear reactor heating and steam supply system, and the intermediate loop (i.e., a secondary cooling circulation loop) is arranged in a loop type, that is, the cooling devices are connected by pipes to form a closed loop of the coolant flow, thereby causing the nuclear reactor heating and steam supply system to have a very large volume and a relatively complex structure.

[0003] The liquid heavy metal reactor is the fourth generation nuclear energy system, and has the advantages of simple structure, high safety, and small size. When the liquid heavy metal reactor is used for power generation, the intermediate loop is generally not used as a medium isolation. However, when the liquid heavy metal reactor is used for steam supply, the radioactive nuclides existing in the cooling medium of the primary loop diffuse into the cooling medium of the secondary loop. In view of the safety of the user end medium steam, an intermediate loop of liquid metal is added as an isolation on the basis of the traditional cooling circulation loop arrangement, which obviously increases the complexity of the original system. Therefore, how to make good use of the intermediate loop, simplify the system structure, and improve the safety and economy of the system operation has become a technical problem to be solved. SUMMARY

[0004] The present application aims to solve the above technical problem, that is, to solve the problem of the complex structure of the existing reactor heating system.

[0005] To this end, the present application provides a reactor heating system, which comprises:

[0006] An outer shell configured to accommodate a space inside the outer shell;

[0007] An inner shell located in the accommodation space and coaxially arranged with the outer shell, the inner shell being configured as a first cooling space, and a second cooling space being configured between the inner shell and the outer shell, and a second cooling medium flowing through the second cooling space;

[0008] A coupling assembly arranged in the first cooling space, the coupling assembly having a first channel and a second channel separated therefrom, a first cooling medium flowing through the first channel, the first channel being in communication with the first cooling space, and the first cooling medium having the same composition but different temperature as the second cooling medium, wherein the pressure of the covering gas on the top surface of the second cooling medium is higher than the pressure of the covering gas on the top surface of the first cooling medium;

[0009] a driving assembly disposed in the second cooling space, the driving assembly being in communication with the inlet end of the second channel to deliver the second cooling medium into the second channel;

[0010] a steam generator disposed in the second cooling space, the steam generator being in communication with the outlet end of the second channel.

[0011] In the preferred technical scheme of the above reactor heat supply system, the coupling assembly comprises a hollow shell, an intermediate heat exchanger disposed in the shell and a flow coupler.

[0012] The shell has a first partition plate and a second partition plate arranged at intervals, and the first partition plate and the second partition plate divide the interior of the shell into a first space, a second space and a third space in a top-down direction, wherein the first space has an outlet in communication with the second channel, the outlet is in communication with the steam generator through a second connecting pipe, the second space has a first inlet, the first inlet is in communication with the driving assembly through a first connecting pipe, and the third space has a plurality of second inlets in communication with the first channel.

[0013] The inlet end of the intermediate heat exchanger is in communication with the second space, the outlet end of the intermediate heat exchanger is in communication with the first space, and the intermediate heat exchanger is used for circulating the second cooling medium.

[0014] The inlet end of the flow coupler is in communication with the third space, and the outlet end of the flow coupler is in communication with the first cooling space, wherein the flow coupler is used for circulating the first cooling medium, and the first cooling medium exchanges heat with the second cooling medium in the third space.

[0015] In the preferred technical scheme of the above reactor heat supply system, the intermediate heat exchanger comprises an intermediate pipe and a circulating pipe.

[0016] The inlet end of the intermediate pipe is in communication with the second space, and the outlet end of the intermediate pipe extends into the flow coupler and is in communication with the inlet end of the circulating pipe.

[0017] The circulating pipe is arranged around the intermediate pipe, and the outlet end of the circulating pipe is in communication with the first space.

[0018] In the preferred technical scheme of the above reactor heat supply system, the flow coupler comprises a first grid plate, an intermediate column, a first outer shell, a power taking blade, a second outer shell, a second grid plate, a third outer shell and a driving blade.

[0019] The first grid plate is sleeved on the intermediate heat exchanger and connected with the inner wall of the shell;

[0020] The intermediate column is vertically arranged at a predetermined distance below the first grid plate in the vertical direction;

[0021] The first shell is buckled on the top of the intermediate column, wherein the top of the first shell is communicated with the outlet end of the intermediate pipeline;

[0022] The power taking vane is located in the first shell and sleeved on the intermediate column;

[0023] The second shell is sleeved on the intermediate column, and the top end of the second shell is communicated with the bottom end of the first shell, and the second shell is communicated with the inlet end of the circulating pipeline;

[0024] The second grid plate is sleeved on the second shell, and the outer circumferential surface of the second grid plate is connected with the inner wall of the shell;

[0025] The top of the third shell is communicated with the bottom of the shell, and the outlet end of the third shell is communicated with the first cooling space;

[0026] The driving vane is sleeved on the intermediate column and located in the third shell.

[0027] In the preferred technical solution of the above reactor heat supply system, the number of the driving assemblies is multiple, and the multiple driving assemblies are arrayed in the second cooling space.

[0028] In the preferred technical solution of the above reactor heat supply system, the driving assembly comprises a driving pump, and the driving pump is communicated with the multiple coupling assemblies through an intermediate pipeline.

[0029] In the preferred technical solution of the above reactor heat supply system, one driving pump is communicated with at least three coupling assemblies.

[0030] In the preferred technical solution of the above reactor heat supply system, the number of the steam generators is multiple, and the multiple steam generators are arrayed in the second cooling space, wherein the steam generators are spaced apart from the driving assemblies.

[0031] In the preferred technical solution of the above reactor heat supply system, the steam generator comprises a steam generator body, a steam inlet pipe and a steam outlet pipe, the steam inlet pipe is communicated with the outlet end of the second channel, and the steam outlet pipe is communicated with an external device;

[0032] The steam generator body is also provided with a steam outlet branch pipe, which is connected to the waste heat discharge system. The steam outlet branch pipe is in a normally closed state. In an accident state, the steam outlet branch pipe is opened and a second cooling medium is used to perform a cooling operation.

[0033] In the preferred technical solution of the above reactor heating system, a core is provided in the first cooling space coaxially with the inner shell;

[0034] The reactor heating system further includes an internal component, which is disposed in the first cooling space and is used to separate the coupling assembly from the core.

[0035] When the above technical solution is adopted, in the reactor heating system of the present invention, a coupling component is provided in the first cooling space, a first cooling medium flows in the first channel of the coupling component, the first channel is connected with the first cooling space, and the second channel is connected with the second cooling space, so that the second cooling medium is transported to the second channel by utilizing the driving component, and the second cooling medium in the second channel performs efficient heat exchange with the first cooling medium flowing in the first channel, thereby cooling the first cooling medium, effectively improving the recycling efficiency of the first cooling medium, and thereby ensuring the safe operation factor of the reactor heating system.

[0036] On the other hand, the first cooling medium and the second cooling medium have the same composition but different temperatures, and the covering gas pressure at the top surface of the second cooling medium is higher than the covering gas pressure at the top surface of the first cooling medium. Therefore, the reactor heating system of the present invention allows the second cooling medium to leak unidirectionally toward the first cooling medium, thereby preventing radioactive substances in the first cooling medium from diffusing into the second cooling medium or the outside world, thereby improving the safety factor of the operation of the reactor heating system.

[0037] At the same time, compared with the three-loop in the prior art, in this example, the second channel is separated from the first channel, the first channel and the first cooling space form one cooling circulation loop, and the second channel and the second cooling space form another cooling circulation loop. That is, two cooling circulation loops are used to cool the reactor heating system, which greatly simplifies the complexity of the reactor heating system structure and improves the safe operation factor of the reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0039] Figure 1 is a schematic structural diagram of a reactor heating system according to an exemplary embodiment;

[0040] Figure 2 yes Figure 1a top view of the reactor heat supply system;

[0041] Figure 3 is a structural schematic view of a coupling assembly in a reactor heat supply system according to an exemplary embodiment;

[0042] Figure 4 is a structural schematic view of a flow coupling in a reactor heat supply system according to an exemplary embodiment.

[0043] BRIEF DESCRIPTION OF DRAWINGS

[0044] 1, outer shell; 2, inner shell; 3, coupling assembly; 4, driving assembly; 5, steam generator; 6, first cooling space; 7, second cooling space; 8, second connecting pipe; 9, first connecting pipe; 10, residual heat removal system; 11, shell body; 12, top cover; 13, intermediate pipe; 14, reactor core; 15, inner component; 31, shell; 32, intermediate heat exchanger; 33, flow coupling; 34, first space; 35, second space; 36, third space; 37, outlet; 38, first inlet; 39, second inlet; 41, driving pump; 51, steam generator body; 52, steam inlet pipe; 53, steam outlet pipe; 54, steam outlet branch pipe; 311, first partition plate; 312, second partition plate; 321, intermediate pipe; 322, circulation pipe; 331, first grid plate; 332, intermediate column; 333, first outer shell; 334, power take-off vane; 335, second outer shell; 336, second grid plate; 337, third outer shell; 338, driving vane; 339, support rod. DETAILED DESCRIPTION

[0045] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that the embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0046] The present application will be further illustrated below with reference to the accompanying drawings in conjunction with the embodiments.

[0047] Referring to Figure 1 and in conjunction with Figure 2 the accompanying drawings, an exemplary embodiment of the present application provides a reactor heat supply system. The reactor heat supply system comprises an outer shell 1, an inner shell 2, a coupling assembly 3, a driving assembly 4 and a steam generator 5.

[0048] Referring to Figure 1As shown, the outer shell 1 can include a shell body 11 and a top cover 12. The shell body 11 is internally hollow, and the bottom of the shell body 11 is in a dome structure. The top of the shell body 11 has an open mouth. The top cover 12 is arranged at the top of the shell body 11 to close the open mouth. The bottom wall and the side wall of the shell body 11 and the bottom surface of the top cover 12 enclose a receiving space. In a cross section parallel to the horizontal plane, the cross-sectional shape of the shell body 11 can include, but is not limited to, a circle, an ellipse, or a regular polygon, etc.

[0049] The inner shell 2 is arranged coaxially in the receiving space of the outer shell 1. The inner shell 2 is also internally hollow, and the bottom of the inner shell 2 is in a dome structure. The cross-sectional shape of the inner shell 2 can include, but is not limited to, a circle, an ellipse, or a regular polygon, etc. The cross-sectional shape of the inner shell 2 can be the same as or different from the cross-sectional shape of the shell body 11 of the outer shell 1. Hereinafter, the cross-sectional shape of the inner shell 2 and the cross-sectional shape of the shell body 11 of the outer shell 1 are both taken as a circle as an example, and the diameter of the inner shell 2 is smaller than the diameter of the shell body 11 of the outer shell 1.

[0050] As shown, the top of the inner shell 2 is inserted into the top cover 12, and the bottom wall and the side wall of the inner shell 2 and the bottom surface of the top cover 12 enclose a first cooling space 6. Other reactor equipment, etc. can be arranged in the first cooling space 6, for example, a reactor core, a control rod assembly, etc. can be arranged in the first cooling space 6.

[0051] Continuing to refer to Figure 1 As shown, the outer wall of the inner shell 2 and the inner wall of the shell body 11 of the outer shell 1 form a second cooling space 7. It should be noted that the space range of the second cooling space 7 includes the partial bottom of the top cover 12, the inner wall and the bottom wall of the shell body 11 of the outer shell 1, and the region between the outer wall of the inner shell 2. A second cooling medium (not shown in the figure) flows in the second cooling space 7, and the second cooling medium can include, but is not limited to, a liquid heavy metal or a liquid metal alloy (such as a liquid lead-bismuth alloy, etc.).

[0052] The coupling assembly 3 is arranged in the first cooling space 6. In the example, the coupling assembly 3 has a first channel and a second channel separated therefrom. The first channel is in communication with the first cooling space 6. A first cooling medium (not shown in the figure) is circulated in the first channel, which can include but is not limited to liquid heavy metal or liquid metal alloy (such as liquid lead-bismuth alloy, etc.), and has the same composition as the second cooling medium but different temperatures. Specifically, the temperature of the first cooling medium is higher than that of the second cooling medium. The cover gas pressure on the top surface of the second cooling medium is higher than that on the top surface of the first cooling medium. In the example, the first cooling medium and the second cooling medium are both liquid lead-bismuth alloy. Since the first cooling medium and the second cooling medium are the same type of medium, they can leak into each other during operation of the reactor heat supply system, thereby reducing the sealing level between the first cooling space and the second cooling space in the reactor heat supply system and simplifying the complexity of the structure of the reactor heat supply system. At the same time, since the cover gas pressure on the top surface of the second cooling medium is higher than that on the top surface of the first cooling medium, only one-way leakage of the second cooling medium into the first cooling medium is allowed, thereby effectively preventing the radioactive substances in the first cooling medium from diffusing into the second cooling medium or the outside world, and greatly improving the safety factor of the operation of the reactor heat supply system.

[0053] The driving assembly 4 is arranged in the second cooling space 7. The driving assembly 4 is in communication with the inlet end of the second channel to deliver the second cooling medium in the second cooling space 7 into the second channel. The first channel and the second channel are separated, so that in the coupling assembly 3, the first cooling medium in the first channel and the second cooling medium in the second channel are rapidly heat-exchanged. Since the temperature of the second cooling medium is lower than that of the first cooling medium, the second cooling medium cools the first cooling medium, and then the cooled first cooling medium reenters the first cooling space 6 and continues to cool the reactor equipment in the first cooling space 6, thereby effectively improving the recycling efficiency of the first cooling medium and effectively ensuring the safe operation of the reactor.

[0054] The steam generator 5 is arranged in the second cooling space 7. The steam generator 5 is in communication with the outlet end of the second channel to generate steam in the steam generator 5 by the heat-exchanged second cooling medium, for heat supply to the downstream client.

[0055] In this embodiment, the first cooling medium is circulated in the first channel and the first cooling space 6, and the reactor equipment and the like in the first cooling space 6 are cooled. The second channel is connected to the second cooling space, and the driving component 4 is used to transport the second cooling medium from the second cooling space 7 to the second channel. The first cooling medium and the second cooling medium complete an efficient heat exchange process in the coupling component 3, thereby using the second cooling medium to cool the first cooling medium. At the same time, the heated second cooling medium is used to form high-temperature steam in the steam generator 5 for heating use by the back-end client, thereby effectively improving the applicability of the reactor heating system.

[0056] At the same time, compared with the three circuits in the prior art, in this example, only two cooling circulation circuits are set up, and liquid heavy metal is used as a cooling medium to form a cooling for the reactor heating system. At the same time, in this example, only the drive assembly 4 is set in the second cooling space 7, eliminating the primary circulation pump and other structures in the prior art, thereby greatly simplifying the complexity of the reactor heating system structure and improving the safe operation factor of the reactor.

[0057] Reference Figure 3 As shown, in some embodiments, the coupling assembly 3 includes a hollow shell 31, an intermediate heat exchanger 32, and a flow coupler 33. The intermediate heat exchanger 32 and the flow coupler 33 are both disposed in the shell 31, wherein the flow coupler 33 is located below the intermediate heat exchanger 32.

[0058] A first partition 311 and a second partition 312 are spaced apart within the housing 31. From top to bottom, the first partition 311 and the second partition 312 divide the interior of the housing 31 into a first space 34, a second space 35, and a third space 36, which are independent of each other. The cross-sectional shape of the housing 31 may include, but is not limited to, a circle, an ellipse, or a regular polygon.

[0059] The first space 34 has an outlet 37 communicating with the second passage, and the outlet 37 is communicated with the steam generator 5 via the second connecting pipe 8. The second space 35 has a first inlet 38, which is communicated with the drive assembly 4 via the first connecting pipe 9. The third space 36 has a plurality of second inlets 39 communicating with the first passage.

[0060] The intermediate heat exchanger 32 is arranged in the shell 31 along the vertical direction, and one end of the intermediate heat exchanger 32 passes through the bottom of the first space 34 and the second space 35 in sequence and extends into the third space 36 to a predetermined depth, and is connected to the flow coupler 33 located in the third space 36.

[0061] The inlet end of the intermediate heat exchanger 32 is in communication with the second space 35, and the outlet end of the intermediate heat exchanger 32 is in communication with the first space 34. The intermediate heat exchanger 32 is used to flow the second cooling medium.

[0062] The inlet end of the flow coupler 33 is in communication with the third space 36, and the outlet end of the flow coupler 33 is in communication with the first cooling space 6. The flow coupler 33 is used to flow the first cooling medium.

[0063] In the embodiment, when the driving assembly 4 works, the second cooling medium in the second cooling space 7 is transported into the second space 35 through the first connecting pipe 9. After flowing through the second space 35, the second cooling medium enters the intermediate heat exchanger 32. After completing the heat exchange with the first cooling medium, the second cooling medium with a higher temperature enters the first space 34 and then enters the steam generator 5 through the outlet 37 and the second connecting pipe 8 in sequence. The first cooling medium flows in the first cooling space 6 and the first channel. The first cooling medium in the first channel exchanges heat with the second cooling medium in the second channel in the third space 36, so as to cool the first cooling medium by using the second cooling medium, thereby effectively improving the recycling efficiency of the first cooling medium and ensuring the safe operation of the reactor.

[0064] It should be noted that in the example, the first channel and the first cooling space 6 form a first cooling circulation loop for the reactor device, and the second channel and the second cooling space 7 form a second cooling circulation loop for the first cooling medium. That is, in the example, only two cooling circulation loops are provided, and the liquid heavy metal is used as the cooling medium to form a cooling system for the reactor heat supply system, thereby effectively simplifying the complexity of the structure of the reactor heat supply system and facilitating the miniaturization development of the reactor heat supply system.

[0065] Referring to Figure 4 and in combination Figure 3 with the drawings, in some embodiments, the intermediate heat exchanger 32 includes an intermediate pipe 321 and a circulating pipe 322.

[0066] The intermediate pipe 321 is arranged in a vertical direction, and the bottom end of the intermediate pipe 321 penetrates the second space 35 downward and extends into the third space 36 by a predetermined depth. It should be noted that the predetermined depth can be flexibly selected according to the cooling medium and the depth of the inner shell 2, and the predetermined depth is not specifically limited in the example. For example, when the cross-sectional shape of the shell 31 is circular, the intermediate pipe 321 is specifically arranged on the axis of the shell 31.

[0067] The inlet end of the intermediate pipe 321 is in communication with the second space 35, and the outlet end of the intermediate pipe 321 extends into the flow coupler 33 and is in communication with the inlet end of the circulating pipe 322.

[0068] The circulation pipe 322 is arranged around the intermediate pipe 321, and the outlet end of the circulation pipe 322 is in communication with the first space 34. The circulation pipe 322 comprises a plurality of continuously repeated pipe segments.

[0069] In this example, the second cooling medium enters the intermediate pipe 321 from the second space 35, and the second cooling medium exchanges heat with the first cooling medium in the third space 36 during the downward movement. Then, the second cooling medium enters the circulation pipe 322 after passing through the flow coupler 33, and the second cooling medium reciprocates in the circulation pipe 322 and exchanges heat with the first cooling medium multiple times, effectively improving the heat exchange efficiency.

[0070] Referring to Figure 4 and in combination Figure 3 As shown in the drawings, in some embodiments, the flow coupler 33 comprises a first grid plate 331, an intermediate column 332, a first outer shell 333, a power extraction blade 334, a second outer shell 335, a second grid plate 336, a third outer shell 337, and a driving blade 338.

[0071] The first grid plate 331 is sleeved on the intermediate heat exchanger 32. Specifically, the first grid plate 331 is sleeved on the circulation pipe 322 and the intermediate pipe 321. The outer peripheral surface of the first grid plate 331 is fixedly connected to the inner wall of the shell 31. In this example, the first grid plate 331 is arranged in the third space 36, which is used to buffer the flow rate of the first cooling medium flowing in the first channel, effectively increasing the heat exchange time of the first cooling medium and the second cooling medium, thereby improving the heat exchange efficiency and effectively reducing the temperature of the first cooling medium.

[0072] The intermediate column 332 is vertically erected and located at a predetermined distance below the first grid plate 331. The intermediate column 332 can be fixedly connected to the shell 31 through the support rod 339 and the third outer shell 337.

[0073] The first outer shell 333 is buckled on the top of the intermediate column 332, and the top of the first outer shell 333 is in communication with the outlet end of the intermediate pipe 321.

[0074] Referring to Figure 4 from top to bottom, the first outer shell 333 comprises a first segment, a reduced diameter segment, and a second segment in sequence. The top of the first segment is in communication with the outlet end of the intermediate pipe 321, the bottom of the first segment is in communication with the top of the reduced diameter segment, the bottom of the reduced diameter segment is connected to the top of the second segment, the bottom of the second segment is connected to the second outer shell 335, and the second segment is in communication with the inside of the second outer shell 335. The diameter of the second segment is smaller than the diameter of the first segment. The top of the intermediate column 332 extends upward and into the middle position of the first segment.

[0075] The power extraction blade 334 is located in the first shell 333 and is sleeved on the intermediate column 332. In the present example, the pipe diameter of the intermediate pipe 321 is larger than the pipe diameter of the circulation pipe 322. In order to keep the temperature of the second cooling medium entering the circulation pipe 322 uniform, the power extraction blade 334 is arranged in the first section. Under the combined action of the gravity of the second cooling medium and the driving assembly 4, the power extraction blade 334 rotates. During the rotation of the power extraction blade 334, the second cooling medium is stirred, so that the temperature of the second cooling medium entering the second shell 335 is kept uniform, thereby improving the stability and continuity of the heat exchange process between the first cooling medium and the second cooling medium.

[0076] It should be noted that the power extraction blade 334 can be a cross-flow blade or an axial-flow blade.

[0077] The second shell 335 is sleeved on the intermediate column 332. The top end of the second shell 335 is in communication with the bottom end of the first shell 333. Specifically, the top end of the second shell 335 is in communication with the bottom end of the second section. The inlet end of the circulation pipe 322 extends into the second shell 335, so that the second cooling medium uniformly enters the circulation pipe 322 under the combined action of the driving assembly 4 and the power extraction blade 334.

[0078] The second grid plate 336 is sleeved on the bottom of the second shell 335. The outer peripheral surface of the second grid plate 336 is connected with the inner wall of the shell 31. The second grid plate 336 is used to buffer the first cooling medium that has been subjected to heat exchange (i.e., cooling and temperature reduction treatment) again, so as to reduce the flow rate of the first cooling medium entering the third shell 337.

[0079] The top of the third shell 337 is in communication with the bottom of the shell 31. The outlet end of the third shell 337 is arranged at the bottom thereof, and the outlet end of the third shell 337 is in communication with the first cooling space 6.

[0080] Referring to Figure 4 As shown, along the top-down direction, the third shell 337 includes a tapered section, a third section, a spherical section and a fourth section that are sequentially in communication. The pipe diameter of the third section and the fourth section can be the same or different. The support rod 339 for fixing and supporting the intermediate column 332 is arranged in the third section.

[0081] The driving blade 338 is sleeved at the bottom end of the middle column 332 and is located in the third shell 337. Specifically, the driving blade 338 is located in the spherical segment. Under the action of gravity of the first cooling medium, the driving blade 338 rotates, and the rotation of the driving blade 338 is used to pressurize and drive the first cooling medium flowing through the spherical segment, so that the stirring of the first cooling medium is completed, and the outflow rate of the first cooling medium is also accelerated, thereby improving the inflow rate of the first cooling medium into the first channel, and effectively improving the heat exchange efficiency.

[0082] The driving blade 338 is coaxially arranged with the power take-off blade 334, that is, the driving blade 338 rotates by coaxial transmission (around the middle column 332) of the power take-off blade 334, which eliminates the design of the power pump in the first cooling space 6, thereby simplifying the structure of the reactor heat supply system and improving the reliability of the reactor heat supply system.

[0083] Referring to Figure 2 In some embodiments, the number of driving assemblies 4 is multiple, and the multiple driving assemblies 4 are arrayed in the second cooling space 7. The multiple driving assemblies 4 can be arranged in the second cooling space 7 in a circumferential array or matrix arrangement to improve the flow of the second cooling medium into the second channel, thereby improving the heat exchange efficiency between the first cooling medium and the second cooling medium.

[0084] In one example, the number of driving assemblies 4 is four. The four driving assemblies 4 are arranged in two groups, and the two groups of driving assemblies 4 are symmetrically arranged, thereby ensuring the flow of the second cooling medium while reducing the structural design size of the reactor heat supply system.

[0085] Referring to Figure 2 In some embodiments, the driving assembly 4 can include but is not limited to a driving pump 41, and the output end of the driving pump 41 communicates with the multiple coupling assemblies 3 through the intermediate pipe 13. Specifically, the output end of the driving pump 41 communicates with the first inlet 38 on the second space 35 through the intermediate pipe 13. The driving pump 41 is used to drive the second cooling medium in the second cooling space 7 to flow into the second channel.

[0086] Referring to Figure 2 As shown in the figure, one driving pump 41 communicates with at least three coupling assemblies 3. Specifically, one driving pump 41 communicates with at least three intermediate heat exchangers 32 to improve the heat exchange efficiency and the utilization rate of the internal space of the reactor heat supply system.

[0087] Referring to Figure 2 In some embodiments, the number of steam generators 5 is multiple, and the multiple steam generators 5 are arrayed in the second cooling space 7. The steam generator 5 is spaced apart from the driving assembly 4.

[0088] Wherein, in one example, the number of steam generators 5 is equal to the number of driving pumps 41, and each driving pump 41 is spaced apart from one steam generator 5 to ensure the gas and heat supply requirement of the back-end client.

[0089] Referring to Figure 2 In some embodiments, the steam generator 5 includes a steam generator body 51, a steam inlet pipe 52 and a steam outlet pipe 53. The steam inlet pipe 52 is in communication with the outlet end of the second channel, i.e., the steam inlet pipe 52 is in communication with the outlet 37 through the second connecting pipe 8. The steam outlet pipe 53 is in communication with an external device, which can include but is not limited to a steam pipeline or a steam storage tank in communication with the client, etc.

[0090] Referring to Figure 1 As shown, the steam generator body 51 is further provided with a steam outlet branch pipe 54. The steam outlet branch pipe 54 is in communication with the residual heat removal system 10. It should be noted that the residual heat removal system 10 is a residual heat removal system of a reactor in the prior art, and the structure of the residual heat removal system 10 is not limited here. The steam outlet branch pipe 54 is in a normally closed state, for example, a shut-off valve is provided on the steam outlet branch pipe 54, wherein the shut-off valve can be manually or remotely controlled to automatically close or open. The steam outlet branch pipe 54 is kept in a normally closed state by closing the shut-off valve. In the event of an accident, the steam outlet branch pipe 54 is opened, and the second cooling medium is used to perform a cooling operation, i.e., after the shut-off valve is opened, the residual heat of the reactor equipment in the inner shell 2 is discharged by using the second cooling medium in the second cooling space 7.

[0091] Referring to Figure 1 As shown, in some embodiments, the first cooling space 6 has a reactor core 14 coaxially arranged in the inner shell 2. The reactor heat supply system further includes an inner member 15 arranged in the first cooling space 6 for separating the coupling assembly 3 and the reactor core 14. Wherein, the inner member 15 can be made of heat insulation material, and the inner member 15 made of heat insulation material separates the coupling assembly 3 on the side with lower temperature, and separates the reactor core 14 on the side with higher temperature.

[0092] In this embodiment, the coupling assembly 3 and the reactor core 14 are separated by the inner member 15, so that the first cooling medium with higher temperature completes the heat exchange process with the second cooling medium from the upper region of the first cooling space 6, and the first cooling medium after the heat exchange process flows out from the fourth section of the third outer shell 337 in the downward direction and flows to the bottom of the reactor core 14 to realize the heat exchange process between the first cooling medium and the reactor core 14 again.

[0093] Referring to Figure 1 and in combination Figures 2 to 4 As shown, the cooling cycle process of the reactor heat supply system of the present embodiment is as follows:

[0094] The second cooling space 7, the intermediate pipe 13, the first connecting pipe 9, the second space 35, the pipe course of the intermediate pipe 321, the first shell 333, the second shell 335, the circulating pipe 322, the first space 34, and the steam generator 5 are sequentially communicated to form a secondary cooling circulation loop. The inner member 15, the core 14, the first cooling space 6, the third space 36, and the third shell 337 are sequentially communicated to form a primary cooling circulation loop. The primary cooling circulation loop is used to realize heat exchange between the core 14 and the first cooling medium, and the secondary cooling circulation loop is used to realize heat exchange between the first cooling medium and the second cooling medium.

[0095] The first cooling medium and the second cooling medium are both taken as liquid lead-bismuth alloy with different temperatures as the coolant for illustration. After the core 14 heats the first cooling medium, the first cooling medium enters the third space 36 and realizes heat exchange with the second cooling medium through the flow coupler 33 and the intermediate heat exchanger 32. Subsequently, the first cooling medium cooled and lowered in temperature sequentially passes through the first grid plate 331, the second grid plate 336, and the third shell 337, reaches the inlet of the driving blade 338, and the driving blade 338 rotates by coaxial transmission of the power taking blade 334 to pressurize the first cooling medium cooled and lowered in temperature and drive the first cooling medium to be discharged from the fourth section of the third shell 337 for the next cooling circulation process with the core 14.

[0096] The driving pump 41 extracts the second cooling medium from the second cooling space 7, the second cooling medium enters the second space 35 through the intermediate pipe 13 and the first connecting pipe 9, and then descends to the first shell 331 along the pipe course of the intermediate pipe 321 and passes through the power taking blade 334 to rotate the power taking blade 334, and the second cooling medium sequentially flows through the second shell 335 and the circulating pipe 322. In the pipe course of the second shell 335 and the circulating pipe 322, the second cooling medium completes heat exchange with the first cooling medium. The second cooling medium raised in temperature is discharged from the circulating pipe 322 and enters the first space 34, and then enters the steam generator 5 through the second connecting pipe 8.

[0097] It should be noted that the pressure of the covering gas of the second cooling medium in the secondary cooling circulation loop is higher than the pressure of the covering gas of the first cooling medium in the primary cooling circulation loop, so as to ensure that the leakage direction of the coolant at the coaxial transmission position is from the secondary cooling circulation loop to the primary cooling circulation loop, and to ensure that the radioactive material in the primary cooling circulation loop cannot be transmitted and released to the secondary cooling circulation loop, thereby avoiding release of the above radioactive material to the rear-end equipment (such as a steam generator, a steam conveying pipe, a steam storage tank, etc.), and improving the safety of the reactor heat supply system.

[0098] In the example, the double-layered container (the inner shell 2 is coaxially arranged with the outer shell 1) is coaxially arranged, the first cooling space 6 in the inner shell 2 is provided with a primary cooling circulation loop suitable for a pool-type reactor, the second cooling circulation loop is arranged in the second cooling space 7, and the second cooling circulation loop contains a second cooling medium for a heat transfer circulation. The coaxial transmission structure in the flow coupler 33 is used to make the reactor heat supply system have the function of shielding the radioactivity of the core 14. In the example, the flow work of the second cooling medium is used to conduct and drive the circulation of the first cooling medium, so that the first cooling medium realizes the circulation process without power (without the driving of the pump 41), and the structure of the reactor heat supply system is effectively simplified. At the same time, the primary cooling circulation loop and the secondary cooling circulation loop are mechanically coupled and related, which also simplifies the complexity of flow control in the reactor heat supply system and improves the safety and reliability of the reactor heat supply system.

[0099] It should be noted that the reactor heat supply system of the example also has the function of using the residual heat removal system to cooperate with the second cooling medium to conduct the residual heat of the core 14 in an accident state.

[0100] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical solutions after the changes or replacements will all fall within the protection scope of the present application.

Claims

1. A reactor heating system, characterized in that: include: a housing, wherein the housing is configured to contain a space; an inner shell, the inner shell being located in the accommodating space and being coaxially arranged with the outer shell, the inner shell being configured as a first cooling space, the space between the inner shell and the outer shell being configured as a second cooling space, and a second cooling medium flowing in the second cooling space; a coupling assembly disposed in the first cooling space, the coupling assembly having a first channel and a second channel separated therefrom, a first cooling medium flowing through the first channel, the first channel being in communication with the first cooling space, the first cooling medium and the second cooling medium having the same composition but different temperatures, wherein a covering gas pressure on a top surface of the second cooling medium is higher than a covering gas pressure on a top surface of the first cooling medium; a drive assembly disposed in the second cooling space and in communication with an inlet end of the second channel to transport the second cooling medium into the second channel; A steam generator is provided in the second cooling space and is communicated with the outlet end of the second channel.

2. The reactor heating system according to claim 1, characterized in that: The coupling assembly includes: a shell with a hollow structure, an intermediate heat exchanger and a flow coupler arranged in the shell; The shell has a first partition and a second partition arranged at intervals. From top to bottom, the first partition and the second partition divide the interior of the shell into a first space, a second space, and a third space that are independent of each other. The first space has an outlet communicating with a second channel, and the outlet is connected to the steam generator through a second connecting pipe. The second space has a first inlet, and the first inlet is connected to the drive assembly through a first connecting pipe. The third space has a plurality of second inlets communicating with the first channel. The inlet end of the intermediate heat exchanger is in communication with the second space, and the outlet end of the intermediate heat exchanger is in communication with the first space, and the intermediate heat exchanger is used to circulate the second cooling medium; The inlet end of the flow coupler is connected to the third space, and the outlet end of the flow coupler is connected to the first cooling space, wherein the flow coupler is used to circulate the first cooling medium, and the first cooling medium and the second cooling medium perform heat exchange in the third space.

3. The reactor heating system according to claim 2, characterized in that: The intermediate heat exchanger includes an intermediate pipe and a circulation pipe; The inlet end of the intermediate pipe is communicated with the second space, and the outlet end of the intermediate pipe extends into the flow coupler and is communicated with the inlet end of the circulation pipe; The circulation pipe is arranged around the middle pipe, and the outlet end of the circulation pipe is communicated with the first space.

4. The reactor heating system according to claim 3, characterized in that: The flow coupler includes a first grid plate, an intermediate column, a first housing, a power take-off blade, a second housing, a second grid plate, a third housing, and a driving blade; The first grid plate is sleeved on the intermediate heat exchanger and connected to the inner wall of the shell; The intermediate column is erected vertically at a predetermined distance below the first grid plate; The first shell is buckled on the top of the middle column, wherein the top of the first shell is connected to the outlet end of the middle pipe; The power take-off blade is located in the first housing and is sleeved on the middle column; The second housing is sleeved on the middle column, and the top end of the second housing is communicated with the bottom end of the first housing, and the second housing is communicated with the inlet end of the circulation pipe; The second grid plate is sleeved on the second outer shell, and the outer peripheral surface of the second grid plate is connected to the inner wall of the shell; The top of the third shell is communicated with the bottom of the shell, and the outlet end of the third shell is communicated with the first cooling space; The driving blade is sleeved on the middle column and located in the third shell.

5. The reactor heating system according to claim 1, characterized in that: There are multiple drive assemblies, and the multiple drive assemblies are arrayed in the second cooling space.

6. The reactor heating system according to claim 5, characterized in that: The driving assembly includes a driving pump, which is communicated with the plurality of coupling assemblies through an intermediate pipe.

7. The reactor heating system according to claim 6, characterized in that: One driving pump is in communication with at least three coupling assemblies.

8. The reactor heating system according to claim 1, characterized in that: There are a plurality of steam generators, and an array of the plurality of steam generators is arranged in the second cooling space, wherein the steam generators are spaced apart from the driving assembly.

9. The reactor heating system according to claim 8, characterized in that: The steam generator includes a steam generator body, a steam inlet pipe and a steam outlet pipe, wherein the steam inlet pipe is connected to the outlet end of the second channel, and the steam outlet pipe is connected to an external device; The steam generator body is also provided with a steam outlet branch pipe, which is connected to the waste heat discharge system. The steam outlet branch pipe is in a normally closed state. In an accident state, the steam outlet branch pipe is opened and a second cooling medium is used to perform a cooling operation.

10. The reactor heating system according to any one of claims 1 to 9, characterized in that: The first cooling space has a core coaxially arranged with the inner shell; The reactor heating system further includes an internal component, which is disposed in the first cooling space and is used to separate the coupling assembly from the core.

Images