Gas-liquid separation device of nuclear reactor

Abstract

The embodiment of the invention provides a gas-liquid separation device of a nuclear reactor, and relates to the technical field of nuclear reactors. The gas-liquid separation device comprises a main flow pipeline and a plurality of branch flow pipelines; the main flow pipeline is provided with a main flow channel, the main flow channel is provided with an inlet end and an outlet end, and the inlet end is lower than the outlet end; the branch pipeline is provided with a branch flow channel, and the outlet height of the branch flow channel is lower than the inlet height of the branch flow channel; high-temperature external fluid floats upwards and enters the main runner through the inlet end, a high-temperature liquid phase flows to the cooling liquid along the branch runner under the action of gravity when being close to the liquid level of the cooling liquid, and a high-temperature gas phase is discharged from the outlet end; according to the gas-liquid separation device, the gas-liquid separation effect is achieved only through natural force without depending on external driving force, so that the gas-liquid separation device is suitable for a nuclear reactor passive safety system, the structural resistance of external fluid flowing is reduced, and the safety is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nuclear reactors, in particular to a gas-liquid separation device of a nuclear reactor. BACKGROUND

[0002] In the related safety design of nuclear reactors, passive technology is used for heat management, which relies on natural forces such as gravity to drive and achieve residual heat removal in the nuclear reactor and the containment. The safety is achieved without relying on external forces. In the process of loop flow and heat removal of the passive safety system, the separation of steam (i.e. vapor) and water can play a role in silencing and suppressing flow oscillation, thereby improving the stability and reliability of system operation.

[0003] Some devices for separating steam and water focus on the separation efficiency of steam and water to obtain higher steam quality for steam turbine power generation and the like. For example, the steam-water separator of a steam generator has a complex structure design and requires a large external driving force. However, for the passive safety system that relies on natural circulation for loop flow and heat removal without relying on external forces, due to the weak flow driving force of the gravity-driven natural circulation, the above-mentioned steam-water separator is not applicable. After arranging and using the above-mentioned steam-water separator, water head loss may be caused, the structural resistance is increased, the flow and heat removal efficiency of the circulation loop is reduced, and the safety is reduced. SUMMARY

[0004] The main purpose of the embodiments of the present application is to provide a gas-liquid separation device of a nuclear reactor, which aims to solve the problem that the gas-liquid separation device is not applicable to the passive safety system of the nuclear reactor and reduces the safety.

[0005] To achieve the above-mentioned purpose, the embodiments of the present application provide a gas-liquid separation device of a nuclear reactor, which comprises:

[0006] A main flow pipeline, at least part of the main flow pipeline is accommodated in a cooling liquid; the main flow pipeline is provided with a main flow channel; the main flow channel has an inlet end and an outlet end, the inlet end is used for allowing external fluid to flow into the main flow channel; the height of the inlet end is lower than the height of the outlet end; the outlet end is located above the liquid level of the cooling liquid;

[0007] A plurality of branch flow pipelines, the plurality of branch flow pipelines are arranged in the main flow pipeline along the extension direction of the main flow channel; the branch flow pipeline is provided with a branch flow channel; the inlet of the branch flow channel is in communication with the main flow channel, and the outlet height of the branch flow channel is lower than the inlet height of the branch flow channel.

[0008] The gas-liquid separation device of the nuclear reactor provided in the application comprises a main flow pipeline and a plurality of branch flow pipelines; the main flow pipeline is provided with a main flow channel, the main flow channel has an inlet end and an outlet end, the height of the inlet end is lower than the height of the outlet end; the branch flow pipeline is provided with a branch flow channel, the outlet height of the branch flow channel is lower than the inlet height of the branch flow channel; the high-temperature external fluid floats into the main flow channel through the inlet end, the high-temperature liquid phase flows to the cooling liquid along the branch flow channel under the action of gravity when being close to the cooling liquid surface, and the high-temperature gas phase is discharged from the outlet end; the embodiment of the application realizes the gas-liquid separation function only by natural force without relying on external driving force, so that the gas-liquid separation device is suitable for the passive safety system of the nuclear reactor, and the structural resistance of the external fluid flow is reduced, which helps to improve the safety. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 Fig. 1 is a structural schematic diagram of the gas-liquid separation device of the nuclear reactor provided in the application;

[0010] Figure 2 Fig. 2 is a principle schematic diagram of the gas-liquid separation function of the gas-liquid separation device of the nuclear reactor provided in the application;

[0011] Figure 3 Fig. 3 is a principle schematic diagram of the reverse flow inhibition of the gas-liquid separation device of the nuclear reactor provided in the application;

[0012] Figure 4 Fig. 4 is a structural schematic diagram of the deformation structure of the gas-liquid separation device of the nuclear reactor provided in the application.

[0013] BRIEF DESCRIPTION OF DRAWINGS

[0014] 10, gas-liquid separation device;

[0015] 11, main flow pipeline; 111, main flow channel; 112, inlet end; 113, outlet end; 114, connecting section;

[0016] 12, branch flow pipeline; 121, branch flow channel; 122, inlet of the branch flow channel; 123, outlet of the branch flow channel;

[0017] 13, storage member;

[0018] 14, cooling liquid surface. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the application more clear, the application is further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application and not to limit the application.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to be limiting of this application.

[0021] To solve the problems of the prior art, the embodiments of the present application provide a gas-liquid separation device of a nuclear reactor, which is intended to solve the problem that the gas-liquid separation device is not suitable for the passive safety system of the nuclear reactor and reduces the safety, and is specifically explained through the following embodiments.

[0022] Figure 1 is a structural schematic diagram of the gas-liquid separation device of the nuclear reactor provided by the embodiments of the present application, please refer to Figure 1 The gas-liquid separation device provided by the embodiments of the present application relates to the technical field of nuclear reactors and is suitable for separating steam and water in a passive safety system. The gas-liquid separation device 10 includes a main flow pipeline 11 and a plurality of branch flow pipelines 12. The main flow pipeline 11 is provided with a main flow channel 111, which is used for flowing of external fluid. The main flow channel 111 has an inlet end 112 and an outlet end 113, and the inlet end 112 is used for flowing of external fluid into the main flow channel 111. The external fluid enters the main flow channel 111 from the inlet end 112 and flows out from the outlet end 113 after flowing through the main flow channel 111. The inlet end 112 can be used to communicate with different forms of natural circulation loop systems or passive heat removal systems to flow the external fluid into the main flow channel 111, thereby achieving the heat removal effect. The main flow pipeline 11 is at least partially contained in the cooling liquid, and the main pipeline section of the main flow pipeline 11 can be submerged below the cooling liquid level 14. The cooling liquid can be cooling water, circulating water, a biphenyl-diphenyl ether mixture or other heat exchange working medium same as the external fluid. The cooling liquid has a cooling effect on the external fluid, so that the high-temperature liquid phase (such as water) in the external fluid is cooled and cooled after flowing into the cooling liquid, thereby achieving the heat removal effect on the reactor.

[0023] Since the density of high-temperature fluid is generally less than that of low-temperature fluid, the high-temperature external fluid rises along the pipeline under the action of natural force (such as buoyancy). The height of the inlet end 112 of the main flow channel 111 is set to be lower than the height of the outlet end 113, so that the high-temperature external fluid enters the main flow channel 111 along the inlet end 112 under the action of natural force, thereby reducing the structural resistance to the flow of the external fluid and helping to improve the safety. The outlet end 113 is located above the cooling liquid level 14, so that the gas phase water (i.e. steam) in the main flow channel 111 floats above the cooling liquid level 14 during gas-liquid separation and can be discharged from the outlet end 113. The outlet end 113 can be in communication with the external atmospheric environment.

[0024] The branch pipe 12 is provided with a branch channel 121; an inlet 122 of the branch channel is connected with the main channel 111, so that the fluid in the main channel 111 can enter the branch channel 121 through the inlet 122 of the branch channel and flow out from an outlet 123 of the branch channel, the outlet 123 of the branch channel can be connected with the cooling liquid or the external atmospheric environment, so that the high-temperature liquid phase in the external fluid can be cooled and cooled after being converged into the cooling liquid, to realize the heat removal effect on the reactor. The main pipe 11 can be connected with the straight pipe through a hole in the side wall. The branch pipes 12 are arranged in the main pipe 11 in a spaced and alternating manner along the extension direction of the main channel 111, because the liquid level of the cooling liquid is affected by the factors such as cooling liquid supplement or heat removal evaporation, the spaced and alternating arrangement ensures that the cooling liquid at different liquid levels can be connected with the main channel 111 through the branch channel 121, to improve the self-adaptive effect of the gas-liquid separation device 10 on different liquid levels. The outlet 123 of the branch channel is arranged at a height lower than that of the inlet 122 of the branch channel, so that the liquid phase fluid in the main channel 111 can flow naturally to the cooling liquid along the branch channel 121 under the action of gravity during gas-liquid separation, without relying on additional driving force, and the gas phase fluid can be prevented from flowing directly to the cooling liquid from the branch channel 121.

[0025] When the gas-liquid separation device 10 performs gas-liquid separation, the high-temperature external fluid floats into the main channel 111 through the inlet end 112, the high-temperature liquid phase fluid flows to the cooling liquid along the branch channel 121 under the action of gravity when being close to the cooling liquid surface 14, and the high-temperature gas phase is discharged from the outlet end 113, so that the gas-liquid separation is realized by only natural force (such as buoyancy and gravity) without relying on external driving force, flow oscillation is inhibited, the gas-liquid separation device 10 is suitable for the passive safety system of the nuclear reactor, and the structural resistance of the external fluid flow is reduced, which is helpful to improve the safety.

[0026] The external fluid can be a heat exchange working medium for realizing natural circulation, for example, a biphenyl-diphenyl ether mixture, an organic working medium such as freon, water and the like. The external fluid can be an outdoor normal temperature or high temperature (higher than the outdoor normal temperature, close to the boiling point), for the high-temperature external fluid, the gas-liquid separation device 10 provided by the embodiment of the application can realize the separation of steam and water of the high-temperature external fluid. The external fluid can be a single-phase fluid or a two-phase mixed fluid, and the phase state of the external fluid is not limited by the application, and the gas-liquid separation device 10 provided by the embodiment of the application is applicable.

[0027] For the convenience of understanding, please refer to Figure 2 , Figure 2is a schematic diagram of a principle of a gas-liquid separation device of a nuclear reactor provided in the embodiments of the present application. Taking high-temperature two-phase (i.e., gas phase and liquid phase) mixed fluid (such as water-vapor mixed fluid) as an example, the density of the high-temperature two-phase mixed fluid is less than the density of the external cooling liquid (such as cooling water, circulating water) of the main flow pipeline, and the main flow channel 111 serves as an upward channel for the high-temperature two-phase mixed fluid. The gas-phase fluid (such as steam bubbles) in the high-temperature two-phase fluid has a smaller density and a faster upward speed than the liquid-phase fluid (such as water), and preferentially occupies the main flow channel 111. When the gas-phase fluid (such as saturated steam) rises to the vicinity of the liquid surface 14, the gas-phase fluid is released and discharged to the atmospheric environment through the outlet end 113 of the main flow channel 111. The liquid-phase fluid in the two-phase mixed fluid rises to the liquid surface and overflows to the cooling liquid through the adjacent branch flow channel 121, thereby achieving a gas-liquid separation effect. In this process, the gas-phase fluid does not directly contact the cooling liquid for condensation, thereby reducing the violent oscillation and noise generated by bubble annihilation, and further achieving stable flow and noise reduction effects. When the external environmental pressure decreases (note: the external pressure decreases, and the boiling point decreases), the saturated two-phase mixed fluid continuously flashes and generates bubbles during upward flow, thereby enhancing the gas-liquid separation effect.

[0028] Taking single-phase fluid as an example, the gas-liquid separation device 10 provided in the present application mainly plays a cooling role. The single-phase liquid enters the main flow channel 111 from the inlet end 112, rises along the main flow channel 111, and then flows to the cooling liquid from the branch flow channel 121, thereby achieving a cooling effect of the high-temperature single-phase fluid by the cooling liquid.

[0029] The height direction in the embodiments of the present application is the orientation of the gas-liquid separation device 10 during installation and use, which can correspond to the direction of gravity. Taking the outlet 123 of the branch flow channel and the inlet 122 of the branch flow channel as an example, during gas-liquid separation of the gas-liquid separation device 10, the height of the outlet 123 of the branch flow channel is lower than the height of the inlet 122 of the branch flow channel, i.e., along the direction of gravity, the inlet 122 of the branch flow channel is above, and the outlet 123 of the branch flow channel is below, so that the liquid-phase fluid can enter the branch flow channel 121 from the inlet 122 of the branch flow channel and flow out from the outlet 123 of the branch flow channel under the action of gravity during gas-liquid separation.

[0030] The number of branch flow pipelines 12 and the cross-sectional ratio of the branch flow pipeline 12 to the main flow pipeline 11 are determined according to the designed flow rate of the injected external fluid, and the embodiments of the present application do not limit the related number and ratio relationship. The length of the branch flow pipeline 12 is determined according to the driving capacity of the externally connected circulating loop system, and the embodiments of the present application do not make any limitation.

[0031] Please continue to refer to Figure 1In some embodiments, the gas-liquid separation device 10 further comprises a storage member 13 for containing the cooling liquid, which can be a closed container or an open tank structure. The plurality of branch pipelines 12 are all accommodated in the storage member 13, so that the liquid-phase fluid can be discharged into the cooling liquid through the straight pipelines. The main pipeline 11 has a connecting section 114 as a connecting pipeline connected with the natural circulation loop system or the passive heat removal system, which is arranged through the storage member 13; the inlet end 112 is located outside the storage member 13 to communicate with the natural circulation loop system or the passive heat removal system.

[0032] Please continue to refer to Figure 1 and Figure 2 In some embodiments, the plurality of branch pipelines 12 of the gas-liquid separation device 10 are arranged alternately and spaced along the extension direction of the main flow channel 111, and the cooling liquid level 14 at any liquid level is located within the height range of the inlet 122 of at least one branch channel, so that the cooling liquid level 14 at any liquid level is communicated with the inlet 122 of at least one branch channel, and the high-temperature liquid-phase fluid in the main flow channel 111 can overflow into the cooling liquid through the branch channel 121 near the cooling liquid level 14, without the need for additional fluid driving force, thereby achieving the effect of self-adaptation to the liquid level. For example, when the cooling liquid level is high, the inlet 122 of the branch channel near the cooling liquid level 14 is in contact with the liquid level, and the liquid-phase fluid can be discharged through the branch channel 121; when the liquid level is low, the inlet 122 of the branch channel located at the lower part of the main flow channel 111 is communicated with the liquid level, and the liquid-phase fluid can still be discharged, so that the gas-liquid separation device 10 can adapt to the fluctuation of the liquid level, ensure the continuous gas-liquid separation process, and improve the safety.

[0033] The plurality of branch pipelines 12 are arranged alternately and spaced along the extension direction of the main flow channel 111, and the height ranges of the inlets 122 of two adjacent branch channels are designed to be connected or at least partially overlapped when arranged along the extension direction of the main flow channel 111, forming a seamless liquid-phase fluid discharge channel, which can ensure that the cooling liquid level 14 at any liquid level is communicated with the inlet 122 of at least one branch channel, and ensure the overflow effect of the gas-liquid separation device 10 on the liquid-phase fluid, thereby achieving the effect of self-adaptation to the liquid level. For example, in two adjacent branch channels 121, the lower edge of the inlet 122 of the first branch channel is consistent with the upper edge of the inlet 122 of the second branch channel, so that the liquid-phase fluid can be smoothly discharged through the branch channel 121 when the liquid level changes in this interval. When the height ranges of the inlets 122 of adjacent branch channels partially overlap, a redundant discharge path is formed, the lower edge of the inlet 122 of the first branch channel is lower than the upper edge of the inlet 122 of the second branch channel, and the two overlap in the middle region. At this time, if the liquid level is in the overlapping interval, the liquid-phase fluid can be discharged through the two branch channels 121 at the same time, thereby increasing the discharge capacity; if the liquid level exceeds the coverage range of a single branch channel 121, the liquid-phase fluid can be discharged through the adjacent branch channel 121, thereby ensuring the continuous gas-liquid separation process.

[0034] Please continue to see Figure 1 and Figure 2 In some embodiments, the branch flow channel 121 is at least partially inclined relative to the extension direction of the main flow channel 111 at the inlet, that is, the entire branch flow channel 121 is inclined relative to the extension direction of the main flow channel 111, or the part of the branch flow channel 121 connected with the main flow channel 111 is inclined relative to the extension direction of the main flow channel 111; and the inclined part of the branch flow channel 121 is inclined towards the inlet end 112 in the direction away from the main flow channel 111, so that the branch flow channel 121 forms a downward guiding effect on the liquid phase fluid during the gas-liquid separation process, so that the liquid phase fluid in the main flow channel 111 flows quickly along the branch flow channel 121 under the action of gravity and flows into the cooling liquid, improving the gas-liquid separation effect and reducing the turbulence and resistance of the fluid at the inlet 122 of the branch flow channel.

[0035] Figure 3 is the principle diagram of the gas-liquid separation device of the nuclear reactor provided by the embodiments of the present application, please see Figure 3 . The inclined branch flow channel 121 also has the effect of inhibiting reverse flow. When intermittent fountain, bubble annihilation and other flow oscillation phenomena occur, because the branch flow channel 121 is at least partially inclined relative to the extension direction of the main flow channel 111 at the inlet and inclined towards the inlet end 112 in the direction away from the main flow channel 111, the included angle between the main flow flowing in the reverse direction through the main flow channel 111 and the branch flow flowing in the reverse direction through the branch flow channel 121 is greater than 90°, flow momentum dissipation occurs at the convergence point of the main flow and the branch flow (i.e. near the connection between the main flow channel 111 and the branch flow channel 121), the reverse flow resistance is increased, the reverse flow intensity is reduced, the flow oscillation is further inhibited, and the possibility of reverse flow is reduced.

[0036] Please continue to see Figure 1 and Figure 2 In some embodiments, the plurality of branch flow channels 12 are arranged alternately on both sides or the circumferential side of the main flow channel 111 along the extension direction of the main flow channel 111, forming a three-dimensional layout; the arrangement on both sides is suitable for flat space or scenarios requiring symmetrical structure, so that the high-temperature liquid phase fluid is evenly introduced into the cooling liquid from both sides to avoid local overheating. The arrangement on the circumferential side is suitable for cylindrical storage members 13 or scenarios requiring omnidirectional liquid discharge, which helps the high-temperature liquid phase fluid to be evenly dispersed in the cooling liquid, improving the cooling efficiency. The branch flow channels 12 can be evenly distributed circumferentially along the main flow channel 111, improving the uniformity of the dispersion of the high-temperature liquid phase fluid in the cooling liquid and further improving the cooling efficiency. The three-dimensional layout helps to increase the number and density of the branch flow channels 121 and improve the gas-liquid separation capacity. By arranging multiple layers of branch flow channels 12 on the circumferential side of the main flow channel 111, the gas-liquid separation efficiency and processing capacity of the gas-liquid separation device 10 can be improved. The alternate arrangement on both sides or the circumferential side can also reduce the mutual interference of fluid flow and reduce resistance.

[0037] Please continue reading. Figure 1 and Figure 2 In some embodiments, the main channel 111 extends vertically and is vertically arranged within the storage unit 13. This helps reduce space occupation and structural resistance to external fluid flow, allowing high-temperature external fluid to rise rapidly along the main channel 111, improving gas-liquid separation efficiency and utilizing gravity to promote gas-liquid separation. For example, a steam-water mixture rises rapidly through the vertical main channel 111, with steam exiting from the outlet 113 above the liquid surface during the ascent, while liquid water flows into the coolant through the branch channel 121 near the liquid surface, improving natural circulation efficiency.

[0038] Figure 4 This is a schematic diagram of a modified structure of the gas-liquid separation device for a nuclear reactor provided in an embodiment of this application. Please refer to [link / reference]. Figure 1 and Figure 4 In some embodiments, the branch pipe 12 can be selected in different structural forms according to actual application requirements, such as straight pipes, bends, serpentine pipes, and irregularly shaped pipes. Straight pipes have a simple structure and low fluid resistance; bends can suppress backflow by changing the fluid flow direction; serpentine pipes can increase the flow channel length and tortuosity to suppress backflow. Irregularly shaped pipes can be customized according to specific operating conditions.

[0039] In some embodiments, the cross-sectional shapes of the main channel 111 and the branch channel 121 can be selected according to fluid characteristics and separation requirements. The main channel 111 and the direct current channel can have the same or different cross-sectional shapes, such as closed polygons, closed shapes enclosed by curves, closed shapes composed of a combination of straight lines and curves, or other irregular shapes. Closed polygons can be triangles, rectangles, etc., which are easy to process and provide uniform fluid distribution. Closed shapes enclosed by curves can be circles, ellipses, etc., which have low flow channel resistance, smooth fluid flow, reduce dead zones, and prevent liquid phase fluid stagnation. Closed shapes composed of a combination of straight lines and curves can be rounded rectangles, racetrack shapes, etc., which can reduce fluid impact and turbulence and improve separation efficiency.

[0040] The gas-liquid separation device for a nuclear reactor proposed in this application includes a main flow pipeline and several branch flow pipelines. The main flow pipeline is provided with a main channel, which has an inlet end and an outlet end, with the height of the inlet end being lower than the height of the outlet end. The branch flow pipelines are provided with branch channels, with the outlet height of the branch channel being lower than the inlet height of the branch channel. High-temperature external fluid rises and enters the main flow pipeline through the inlet end. When the high-temperature liquid phase approaches the surface of the coolant, it flows towards the coolant along the branch channels under the action of gravity, while the high-temperature gas phase is discharged from the outlet end. The embodiments of this application achieve gas-liquid separation without relying on external driving force, but only through natural force, making the gas-liquid separation device suitable for the passive safety system of a nuclear reactor and reducing the structural resistance of external fluid flow, which helps to improve safety.

[0041] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0042] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this application, unless otherwise stated, "multiple" means two or more. Additionally, if "and / or," "and / or," or "and / or" appears throughout the text, it means three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously.

[0043] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0045] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural transformations made based on the content of the specification and drawings of this application under the concept of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A gas-liquid separation device for a nuclear reactor, characterized in that, include: The main pipeline, at least a portion of which is contained in the coolant; The main pipeline is provided with a main channel; the main channel has an inlet end and an outlet end, the inlet end is used to allow external fluid to flow into the main channel; the height of the inlet end is lower than the height of the outlet end; the outlet end is located above the coolant surface; A plurality of branch pipes are arranged alternately and at intervals along the extension direction of the main channel; each branch pipe is provided with a branch channel; the inlet of each branch channel is connected to the main channel, and the outlet height of each branch channel is lower than the inlet height of the branch channel.

2. The gas-liquid separation device according to claim 1, characterized in that, The coolant level at any liquid level is within the height range of the inlet of at least one of the branch channels.

3. The gas-liquid separation device according to claim 2, characterized in that, Along the extension direction of the main channel, the height ranges of the inlets of two adjacent branch channels are connected or at least partially overlap.

4. The gas-liquid separation device according to claim 1, characterized in that, The tributary is located at the inlet and is at least partially inclined relative to the extension direction of the main channel, and is inclined toward the inlet end in a direction away from the main channel.

5. The gas-liquid separation device according to claim 1, characterized in that, Several of the branch pipes are arranged at intervals and alternately on both sides or around the main channel along the extension direction of the main channel.

6. The gas-liquid separation device according to claim 1, characterized in that, The gas-liquid separation device further includes: A storage unit for containing coolant; a plurality of branch pipes are housed within the storage unit; the main pipe has a connecting section that extends through the storage unit; and the inlet end is located at the connecting section.

7. The gas-liquid separation device according to claim 1, characterized in that, The main channel extends vertically.

8. The gas-liquid separation device according to claim 1, characterized in that, The cross-sectional shape of the main channel and / or the branch channel is set to one of the following: Closed polygons, closed figures enclosed by curves, and closed figures composed of a combination of straight lines and curves.

9. The gas-liquid separation device according to claim 1, characterized in that, The inlet end is used to connect to a natural circulation loop system or an active heat dissipation system; and / or, The inlet is used to allow single-phase fluid or two-phase mixed fluid to flow into the main channel.

10. The gas-liquid separation device according to claim 1, characterized in that, The branch pipeline is configured as one of the following: Straight pipes, bent pipes, serpentine pipes, and irregularly shaped pipes.

Images