Experimental device for measuring layering characteristic of mixed gas

Abstract

The invention provides an experimental device for measuring layering characteristics of mixed gas, and belongs to the technical field of nuclear reactor engineering. The problem of component and temperature stratification characteristic research of the mixed gas in a large space is solved, and the problem of influence of parameters such as gravity and temperature on the component and temperature stratification characteristic of the mixed gas is solved. The measurement experiment device comprises an experiment device body, a heating module, a measurement module and an inflation and exhaust module, and the measurement experiment device can measure the component concentration stratification characteristic of mixed gas and can also measure the temperature stratification characteristic of the mixed gas. The device simultaneously covers the measurement of the component stratification characteristic and the temperature stratification characteristic, can realize the steady-state measurement of the mixed gas after mixing and the transient measurement of the mixing process of different gases, and is wider in application range.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear reactor engineering, and in particular relates to a mixed gas stratification characteristic measurement experimental device. Background Art

[0002] The containment is the last of the three major safety barriers in a nuclear reactor system. Ensuring the integrity of the containment can prevent radioactive leakage, thereby ensuring the safety of the public and the environment. Small reactors have the advantages of compact structure, flexible layout, small mass and volume, and high energy density, and have very broad development prospects. When an accident occurs in a nuclear reactor, there will be a mixture of binary or multi-component gases in the containment; the ultra-high temperature gas-cooled reactor is a type of small reactor, which generally uses inert gases and carbon dioxide as coolants. Compared with single-component inert gases, binary or multi-component inert mixed gases have the advantages of stable physical and chemical properties, good compression performance, and excellent thermodynamic properties. Therefore, binary or multi-component inert mixed gases are more suitable as coolants for gas-cooled reactors than single-component inert gases.

[0003] At present, my country's research on ultra-high temperature gas-cooled reactors is still in its infancy, and the research on the composition and temperature stratification characteristics of binary or multi-component mixed gases in large spaces is insufficient. Since the influence of parameters such as gravity and temperature on the composition and temperature stratification characteristics of mixed gases is still unclear, it is necessary to carry out experimental research on the measurement of the composition and temperature stratification characteristics of binary or multi-component mixed gases in large spaces. Summary of the invention

[0004] In view of this, the present invention provides an experimental device with a large space, which can realize component and temperature measurement at different heights and radial positions. The device can provide different temperatures, pressures, component ratios of mixed gases, initial distribution states, heating power, temperature differences and other conditions, so as to solve the problem of studying the component and temperature stratification characteristics of mixed gases in a large space, and the problem of whether parameters such as gravity and temperature have an impact on the component and temperature stratification characteristics of mixed gases, explore the influence law and mechanism of the component and temperature stratification and diffusion time characteristics of mixed gases, and provide important technical support for the passive safety analysis and engineering application of special small reactors.

[0005] To achieve the above object, the present invention adopts the following technical scheme: a mixed gas stratification characteristic measurement experimental device, comprising an experimental device body, a heating module, a measurement module and a charging and exhausting module,

[0006] The experimental device body includes a pressure vessel, a base support and a safety valve. Four partitions are arranged inside the pressure vessel, and the four partitions are evenly distributed in the height direction of the pressure vessel, and are respectively located in the upper part, the middle upper part, the middle lower part and the lower part in the height direction of the pressure vessel; the base support is connected and fixed to the bottom of the pressure vessel; and the safety valve is connected to the top of the pressure vessel.

[0007] The heating module comprises a heating belt and a temperature control box. The heating belt is wound around the outer wall of the pressure vessel and is distributed in the height direction thereof; and the temperature control box is connected to the heating belt through a wire.

[0008] The measuring module includes a pressure gauge and a plurality of temperature gauges. The pressure gauge is connected to the top of the pressure vessel; the plurality of temperature gauges include a lower temperature gauge, a middle-lower temperature gauge, a middle temperature gauge, a middle-upper temperature gauge and an upper temperature gauge. The lower temperature gauge is connected to the lower part of the outer wall of the pressure vessel, the middle-lower temperature gauge is connected to the middle-lower part of the outer wall of the pressure vessel, the middle temperature gauge is connected to the middle part of the outer wall of the pressure vessel, the middle-upper temperature gauge is connected to the middle-upper part of the outer wall of the pressure vessel, and the upper temperature gauge is connected to the upper part of the outer wall of the pressure vessel, and each temperature gauge is evenly distributed in the height direction.

[0009] The inflation and exhaust module includes an inflation module, an exhaust module, a gas sampling module and a vacuum module. The inflation module includes a bottom regulating valve, a top regulating valve, a three-way valve and corresponding pipelines, wherein the bottom regulating valve is connected to the bottom of the pressure vessel, the top regulating valve is connected to the top of the pressure vessel, and the three-way valve is connected to the bottom regulating valve and the top regulating valve through pipelines; the exhaust module includes a sewage pipeline regulating valve, and the sewage pipeline regulating valve is connected to the bottom of the pressure vessel; the gas sampling module includes a quick-connect plug, a regulating valve and corresponding pipelines, wherein the lower regulating valve and the lower quick-connect plug are connected to the lower part of the side wall of the pressure vessel through corresponding pipelines, the middle-lower regulating valve and the middle-lower quick-connect plug are connected to the middle-lower part of the side wall of the pressure vessel through corresponding pipelines, the middle-upper regulating valve and the middle-upper quick-connect plug are connected to the middle-upper part of the side wall of the pressure vessel through corresponding pipelines, and the upper regulating valve and the upper quick-connect plug are connected to the upper part of the side wall of the pressure vessel through corresponding pipelines; the vacuum module includes a regulating valve, a vacuum pump and corresponding pipelines. The regulating valve and the vacuum pump are connected to the bottom of the pressure vessel through corresponding pipelines.

[0010] Furthermore, multiple gas sampling sections are distributed in the height direction of the pressure vessel. Three gas sampling pipelines are arranged at each gas sampling section at the same time. The gas sampling pipelines can be freely disassembled and installed to any sampling section. In the radial direction of the pressure vessel, each gas sampling pipeline can be freely extended and retracted. The extension is driven by electricity and can accurately achieve the extension length. The end of the gas sampling pipeline close to the pressure vessel extends into the pressure vessel within a range of (0~d / 2), d is the inner diameter of the pressure vessel, and the angle between the two pipelines is 90°.

[0011] Furthermore, two temperature gauges are arranged at the same time in each temperature measurement section. The measuring end of the temperature gauge can be freely extended and retracted. The extension and retraction are driven by electricity and the extension length can be accurately achieved. The extension range of the two temperature gauge measuring ends into the pressure vessel is (0~d / 2), d is the inner diameter of the pressure vessel, and the angle between the two pressure gauges is 90°.

[0012] Furthermore, each partition in the main body of the experimental device consists of a partition perpendicular to the height direction of the pressure vessel and two partitions parallel to the direction of the pressure vessel. The two partitions parallel to the height direction of the pressure vessel divide the area of ​​the partition perpendicular to the height direction of the pressure vessel into four equal parts, where the space corresponding to three parts of the area is arranged with a gas sampling position, and the space corresponding to the remaining part of the area is used as a channel for gas to flow up and down, ensuring that the gas volume near each gas sampling position is equal and does not affect each other. The partition can be freely extended and retracted in the height direction of the pressure vessel, and the extension and retraction is driven by electricity, and the extension and retraction position can be accurately achieved.

[0013] Furthermore, a plurality of heating tapes are evenly wound on the outer surface of the pressure vessel, and the heating tapes are connected to a temperature control box through wires. The temperature of the experimental gas is automatically controlled by adjusting the heating power of the temperature control box. By setting the heating power of the plurality of heating tapes, the heating conditions of the constant temperature and constant temperature difference of the experimental gas in the pressure vessel can be automatically controlled.

[0014] Furthermore, by controlling the three-way valve in the gas charging pipeline, the position where the gas enters the pressure vessel can be changed to achieve gas charging from the top or bottom, and the charging sequence can be that different gases are charged simultaneously or one after the other.

[0015] Compared with the prior art, the beneficial effects of the mixed gas stratification characteristic measurement experimental device described in the present invention are:

[0016] 1. The research object of the experimental device described in the present invention can be a gas of two or more components mixed evenly, or a single component gas, such as helium, neon, argon, krypton, xenon, radon, hydrogen, nitrogen, methane, etc. and binary or multi-component mixed gases. It can realize the research of the component and temperature equilibrium distribution characteristics of multi-component gas and the dynamic research of the mixing process and mixing time of different gases, and the measurement object is more extensive.

[0017] 2. The measurement of temperature and gas component concentration in the experimental device described in the present invention can be achieved through online real-time measurement by connecting with a measuring device and a computer, or offline measurement by means of a sampling device and a temperature dial, and the test is flexible and accurate.

[0018] 3. The measurement experimental device of the present invention can measure both the component concentration stratification characteristics of the mixed gas and the temperature stratification characteristics of the mixed gas. One device covers the measurement of both component stratification characteristics and temperature stratification characteristics, and can also realize the steady-state measurement of the mixed gas after mixing and the transient measurement of the mixing process of different gases, with a wider range of applications.

[0019] 4. The measurement experimental device described in the present invention can provide initial conditions such as temperature, temperature difference, pressure, component ratio of mixed gas, initial distribution state, heating power, etc. There are more initial parameters, and the creation of initial conditions does not require external equipment. It is more powerful and easier to operate.

[0020] 5. The gas sampling pipeline of the experimental device described in the present invention can be freely disassembled and installed to different gas sampling sections in the height direction. Each gas sampling pipeline can be freely extended to different radial positions of the gas sampling section, and the measurement range is wider.

[0021] 6. The experimental device described in the present invention can realize automatic control of the temperature of the heating belt; electric drive of the air intake pipeline length, the position of the temperature measurement end, and the position of the partition; online real-time measurement of pressure and temperature, which is more convenient to operate, more accurate in positioning, and more comprehensive in results.

[0022] 7. The experimental device described in the present invention can realize inflation at different positions; it can be filled with mixed gases with a pre-proportioned ratio, or with single-component gases, and can provide a mixing place for mixing different gases; different gases can be filled at the same time or at different times; the initial operating conditions are more extensive and flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 It is a structural schematic diagram of the mixed gas stratification characteristic measurement experimental device of the present invention;

[0025] Figure 2 It is a front view of the mixed gas stratification characteristic measurement experimental device of the present invention;

[0026] Figure 3 is a partial cross-sectional view of the pressure vessel of the present invention;

[0027] Figure 4 are cross-sectional views of different sections of the mixed gas stratification characteristic measurement experimental device of the present invention;

[0028] In the figure, 1 is a pressure gauge, 2 is a safety valve, 3 is a pressure vessel, 4 is a heating tape, 5 is a partition, 6 is a temperature control box, 7 is a vacuum pipeline regulating valve, 8 is a vacuum pump, 9 is a base bracket, 10 is a sewage pipeline regulating valve, 11 is a bottom regulating valve, 12 is a lower temperature gauge, 13 is a lower regulating valve, 14 is a lower quick-connect plug, 15 is a middle-lower temperature gauge, 16 is a middle-lower regulating valve, 17 is a middle-lower quick-connect plug, 18 is a three-way valve, 19 is a middle temperature gauge, 20 is a stainless steel pipe, 21 is a middle-upper quick-connect plug, 22 is a middle-upper regulating valve, 23 is a middle-upper temperature gauge, 24 is an upper regulating valve, 25 is an upper quick-connect plug, 26 is an upper temperature gauge, and 27 is a top regulating valve. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0030] See also Figure 1-4 The present embodiment is described as a mixed gas stratification characteristic measurement experimental device, comprising an experimental device body, a heating module, a measurement module and a charging and exhausting module.

[0031] The experimental device body includes a pressure vessel 3, a base support 9, a safety valve 2 and a partition 5, and the partition 5 includes 4 groups of partitions and 1 horizontal partition; 4 groups of partitions 5 are evenly distributed in the upper, upper middle, lower middle and lower parts of the pressure vessel 3 in the height direction; a base support 9 is provided at the bottom of the pressure vessel 3 to support and fix; a safety valve 2 is provided on one side of the top of the pressure vessel 3 to protect; multiple gas sampling sections are evenly distributed in the height direction of the outer wall of the pressure vessel 3; 5 temperature measurement sections are evenly distributed in the upper, upper middle, middle, lower middle and lower parts of the outer wall of the pressure vessel 3 in the height direction; a heating belt 4 is evenly wound in the height direction of the outer wall of the pressure vessel 3; a pressure gauge 1 is provided at the top of the pressure vessel 3; a vacuum pipeline is provided on one side of the bottom of the pressure vessel 3; a sewage pipeline regulating valve 10 for exhaust and sewage is provided at the bottom of the pressure vessel 3; and upper and lower air inlet pipelines are symmetrically distributed on one side of the top and bottom of the pressure vessel 3.

[0032] like Figure 3 and Figure 4 , 4 groups of partitions in the partition 5 are evenly distributed in the upper part, the upper middle part, the lower middle part, and the lower part of the height direction of the pressure vessel 3, and a horizontal partition is located at the lowest part of the pressure vessel 3. Each group of partitions consists of a horizontal partition perpendicular to the height direction of the pressure vessel and two vertical partitions parallel to the height direction of the pressure vessel. The cross-sectional view of the horizontal partition is as shown in Figure 4As shown in EE, the horizontal partition is sealed with the inner wall of the pressure vessel to avoid mutual influence between different gas sampling sections, and the gap provides a channel for gas to diffuse up and down. The two vertical partitions divide the area of ​​the horizontal partition into four equal parts, and its cross-sectional view is shown in Figure 4 As shown in the FF in the figure, the three gas sampling positions in the same gas sampling section are prevented from influencing each other. The lowest horizontal partition can prevent the gas from affecting the gas mixing process when the gas is filled downward.

[0033] like Figure 1 The heating module includes a heating belt 4 and a temperature control box 6. The heating belt 4 is wound around the outer wall of the pressure vessel 3 and is distributed in the height direction thereof, so as to heat the mixed gas in the pressure vessel 1. The heating belt 4 includes multiple heating belts, and different temperature gradient conditions can be created by changing the set temperature of different heating belts; the temperature control box 6 is connected to the heating belt 4 through a wire to realize automatic control of the temperature and temperature gradient of the heating belt 4.

[0034] like Figure 2 and Figure 4 The measurement module includes a pressure gauge 1 and multiple temperature gauges. The pressure gauge 1 is located at the top of the pressure vessel 3 and is used to measure the pressure of the mixed gas; multiple temperature gauges are evenly distributed on the five temperature measurement sections of the upper, upper middle, middle, lower middle, and lower parts of the pressure vessel 3 in the height direction. Each temperature measurement section is provided with two temperature gauges at 90° to each other. The measuring ends of the temperature gauges can be freely extended and retracted. The extension is driven by electricity and can accurately achieve the extension length. The measuring ends of the two temperature gauges extend into the interior of the pressure vessel 3 within a range of (0 to d / 2), where d is the inner diameter of the pressure vessel 3. The cross-sectional view of the temperature measurement section is shown in the figure. Figure 4 As shown in CC, the temperature at different heights and radial positions can be measured.

[0035] like Figure 2 and Figure 4The charging and exhausting module includes a charging module, an exhausting module, a vacuuming module and a gas sampling module. The charging module includes an upper regulating valve 24, a lower regulating valve 11, a three-way valve 18 and corresponding pipelines. The upper regulating valve 24 and the lower regulating valve 11 are arranged at the top and bottom of the pressure vessel 3, and the two are symmetrically distributed to control the position where the helium-xenon gas enters the pressure vessel to realize gas upper filling and gas lower filling. Helium-xenon gas enters the pipeline from one side of the three-way valve 18. By adjusting the three-way valve 18, the direction of the gas flow after entering the pipeline can be controlled; the exhaust module includes an exhaust regulating valve 10 and corresponding pipelines. The exhaust regulating valve 10 is arranged at the bottom of the pressure vessel 3 to achieve the functions of exhaust and sewage discharge; the vacuum module includes a vacuum pipeline regulating valve 7, a vacuum pump 8 and corresponding pipelines to achieve vacuuming of the pressure vessel 3 to avoid the residual gas inside the pressure vessel 3 from affecting the experimental results; the gas sampling module includes multiple gas sampling sections in the height direction of the pressure vessel 3, and each gas sampling section is provided with 3 gas sampling pipelines, which are respectively arranged at 0°, 90° and 180° positions on the half section. The gas sampling pipeline can be freely disassembled and installed to any sampling section; in the radial direction of the pressure vessel 3, each gas sampling pipeline can be freely extended and retracted, and the extension and retraction is driven by electricity, and the extension and retraction length can be accurately achieved. The end of the gas sampling pipeline close to the pressure vessel 3 extends into the pressure vessel 3 within a range of (0~d / 2), where d is the inner diameter of the pressure vessel 3. It can realize the sampling of gas at different heights and radial positions. Each sampling pipeline is equipped with a regulating valve and a quick-connect plug.

[0036] The specific operation process of the measurement experimental device for measuring the component concentration stratification characteristics of the mixed gas and the temperature stratification characteristics of the mixed gas is as follows:

[0037] Embodiment 1:

[0038] Open the regulating valve 7 and the vacuum pump 8, evacuate the pressure vessel 3, and close the regulating valve 7 and the vacuum pump 8 after a certain vacuum degree is reached. Open the three-way valve 18 and the top regulating valve 27 upwards, fill the pressure vessel 3 with a certain gas, and close the top regulating valve 27 after the inflation is completed. Open the three-way valve 18 downwards, open the lower regulating valve 11, and fill another gas, and close the lower regulating valve 11 after the inflation is completed. Read the pressure of different gases charged by the pressure gauge 1 to match the component ratio of the mixed gas. At the same time, by controlling the radial position of the measuring end of different gas extraction pipelines and the position of the partition, measure the gas component ratio at different heights and radial positions in the pressure vessel 3. When the mixed gas component ratio at each position no longer changes, it can be considered that the two gases are mixed evenly. The gas mixing process is recorded in real time to complete the transient measurement of the mixing process of different gases.

[0039] Embodiment 2:

[0040] Open the regulating valve 7 and the vacuum pump 8, evacuate the pressure vessel 3, and close the regulating valve 7 and the vacuum pump 8 after a certain vacuum degree is reached. Open the three-way valve 18 and the top regulating valve 27 upwards, fill a certain proportion of mixed gas into the pressure vessel 3, and close the top regulating valve 27 after the inflation is completed. Read the different pressures of the mixed gas through the pressure gauge 1. Open the temperature control box 6, set the heating temperature of different belts, and realize automatic control of the gas temperature or temperature gradient. By controlling the radial position of the measuring end of different gas extraction pipelines and the position of the partition, measure the proportion of gas components at different heights and radial positions in the pressure vessel 3. By controlling the radial position of the measuring end of different thermometers, read the temperature indications at different heights and radial positions in the pressure vessel 3. The entire process of component and temperature measurement can be measured online in real time.

[0041] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well.

Claims

1. An experimental device for measuring the stratification characteristics of mixed gases, characterized in that: The experimental device comprises an experimental device body, a heating module, a measuring module and an inflation / exhaust module. The experimental device body comprises a pressure vessel (3), a base support (9) and a safety valve (2). A plurality of groups of partitions (5) are arranged inside the pressure vessel (3). Each group of partitions (5) is evenly distributed in the height direction of the pressure vessel (3) and is respectively located in the upper part, the middle upper part, the middle lower part and the lower part of the height direction of the pressure vessel (3); the base support (9) is connected and fixed to the bottom of the pressure vessel (3); and the safety valve (2) is connected to the top of the pressure vessel (3); The heating module comprises a heating belt (4) and a temperature control box (6), wherein the heating belt (4) is wound around the outer wall surface of the pressure vessel (3), and the temperature control box (6) is connected to the heating belt (4); The measuring module comprises a pressure gauge (1) and a plurality of temperature gauges, the pressure gauge (1) being connected to the top of the pressure container (3), and the plurality of temperature gauges being arranged on the outer wall surface of the pressure container (3); The inflation and exhaust module comprises an inflation module, an exhaust module, a gas sampling module and a vacuum module. The inflation module comprises a bottom regulating valve (11), a top regulating valve (27), a three-way valve (18) and corresponding pipelines. The bottom regulating valve (11) is connected to the bottom of the pressure vessel (3), the top regulating valve (27) is connected to the top of the pressure vessel (3), and the three-way valve (18) is connected to the bottom regulating valve (11) and the top regulating valve (27) through pipelines. The exhaust module comprises a sewage pipeline regulating valve (10), and the sewage pipeline regulating valve (10) is connected to the bottom of the pressure vessel (3). The gas sampling module comprises a quick-connect plug, a plurality of regulating valves and corresponding pipelines. The regulating valves and the quick-connect plug are connected to the side wall of the pressure vessel (3) through corresponding pipelines. The vacuum module comprises a vacuum pipeline regulating valve (7), a vacuum pump (8) and corresponding pipelines. The vacuum pipeline regulating valve (7) and the vacuum pump (8) are connected to the bottom of the pressure vessel (3) through corresponding pipelines.

2. The mixed gas stratification characteristic measurement experimental device according to claim 1, characterized in that: A plurality of gas sampling cross sections are distributed in the height direction of the pressure vessel (3), and a plurality of gas sampling pipelines are arranged in each gas sampling cross section.

3. The mixed gas stratification characteristic measurement experimental device according to claim 2, characterized in that: In the radial direction of the pressure vessel (3), each air intake pipeline can be freely extended and retracted, and the extension and retraction is driven by electricity. The end of the air intake pipeline close to the pressure vessel (3) extends into the pressure vessel (3) within a range of 0 to d / 2, where d is the inner diameter of the pressure vessel (3).

4. The mixed gas stratification characteristic measurement experimental device according to claim 2, characterized in that: Each gas sampling section is provided with three gas sampling pipelines, which are respectively arranged at the positions of 0°, 90° and 180° on the half section. Each gas sampling pipeline is provided with a regulating valve and a quick-connect plug.

5. The mixed gas stratification characteristic measurement experimental device according to claim 1, characterized in that: Two temperature gauges are arranged simultaneously in each temperature measurement section, and the angle between the two temperature gauges is 90°.

6. The mixed gas stratification characteristic measurement experimental device according to claim 1, characterized in that: The measuring end of each temperature gauge can be freely extended and retracted, and the extension and retraction are driven by electricity. The measuring ends of the two temperature gauges extend into the pressure vessel (3) within a range of 0 to d / 2, where d is the inner diameter of the pressure vessel (3).

7. The mixed gas stratification characteristic measurement experimental device according to claim 1, characterized in that: Each set of partitions consists of a horizontal partition perpendicular to the height direction of the pressure vessel (3) and two vertical partitions parallel to the height direction of the pressure vessel (3). The two vertical partitions divide the area of ​​the horizontal partition into four equal parts. A horizontal partition is provided below the lower partition.

8. The mixed gas stratification characteristic measurement experimental device according to claim 1, characterized in that: By controlling the three-way valve (18) in the gas charging pipeline, the position where the gas enters the pressure container (3) can be changed to achieve gas charging from the top or the bottom.

9. The mixed gas stratification characteristic measurement experimental device according to claim 1, characterized in that: The multiple temperature gauges in the measurement module include a lower temperature gauge (12), a middle and lower temperature gauge (15), a middle temperature gauge (19), a middle and upper temperature gauge (23) and an upper temperature gauge (26); the lower temperature gauge (12) is connected to the lower part of the outer wall of the pressure vessel (3); the middle and lower temperature gauge (15) is connected to the middle and lower part of the outer wall of the pressure vessel (3); the middle temperature gauge (19) is connected to the middle part of the outer wall of the pressure vessel (3); the middle and upper temperature gauge (23) is connected to the middle and upper part of the outer wall of the pressure vessel (3); and the upper temperature gauge (26) is connected to the upper part of the outer wall of the pressure vessel (3); and the temperature gauges are evenly distributed in the height direction.

10. The mixed gas stratification characteristic measurement experimental device according to claim 1, characterized in that: The regulating valve in the gas sampling module comprises a lower regulating valve (13), a lower quick-connect plug (14), a middle-lower regulating valve (16), a middle-lower quick-connect plug (17), a middle-upper quick-connect plug (21), a middle-upper regulating valve (22), an upper regulating valve (24) and an upper quick-connect plug (25), wherein the lower regulating valve (13) and the lower quick-connect plug (14) are connected to the lower part of the side wall of the pressure vessel (3) through corresponding pipelines, the middle-lower regulating valve (16) and the middle-lower quick-connect plug (17) are connected to the middle-lower part of the side wall of the pressure vessel (3) through corresponding pipelines, the middle-upper regulating valve (22) and the middle-upper quick-connect plug (21) are connected to the middle-upper part of the side wall of the pressure vessel (3) through corresponding pipelines, and the upper regulating valve (24) and the upper quick-connect plug (25) are connected to the upper part of the side wall of the pressure vessel (3) through corresponding pipelines.

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