Variable volume reaction vessel

Abstract

The application discloses a variable-volume reaction kettle and relates to the field of gas-liquid phase equilibrium reaction kettles. The variable-volume reaction kettle comprises an outer kettle body, an inner kettle body, a kettle cover, a stirrer and an adjusting unit. The variable-volume reaction kettle achieves the function of changing the space in the kettle by the relative displacement of the outer kettle body and the inner kettle body, thereby adjusting the pressure. The liquid material in the kettle body is discharged through a discharge port, and the reaction kettle is thoroughly cleaned by introducing clean water into the space in the kettle body, so that the next test is not affected by residues. The kettle cover does not need to be opened every time to pour out the liquid material, and the leakage needs to be checked again after the cover is opened and closed each time, thereby improving the experimental efficiency. Meanwhile, the sealing effect of the reaction kettle body is affected by frequent opening of the cover, the sealing element of the reaction kettle is easily damaged, the service life of the reaction kettle is reduced, and the experimental efficiency is affected by frequent replacement of the sealing element.

Description

Technical Field

[0001] This invention relates to the field of gas-liquid phase equilibrium reactor technology, specifically a variable volume reactor. Background Technology

[0002] A gas-liquid phase equilibrium reactor is an experimental device specifically designed to determine the thermodynamic data of a mixture in a gas-liquid two-phase equilibrium state. Its design and function are focused on accurately obtaining phase equilibrium parameters.

[0003] The main function of the variable volume gas-liquid phase equilibrium reactor is to dynamically adjust the phase equilibrium. Under constant temperature or pressure conditions, the system is forced to reach a new equilibrium state by changing the volume, and the temperature and pressure are precisely controlled. It has become a core tool for studying complex phase behavior. Its applications cover multiple fields such as energy, pharmaceuticals, and environmental protection. In the future, it will play an even greater role in the development of supercritical fluid technology and green chemical processes.

[0004] When determining the CO2 solubility equilibrium in the absorbent, or other gas-liquid phase equilibrium tests such as methane hydrate, there will be some pressure loss after sampling and analysis. In this case, the volume inside the vessel needs to be reduced to increase the pressure to compensate for the pressure loss due to sampling and achieve pressure balance.

[0005] After each test, the reactor needs to be drained and thoroughly cleaned to prevent residue from affecting the next test. To ensure clean drainage, the reactor lid needs to be opened and the liquid material poured out each time. In existing technologies, variable volume reactors use a piston that can move up and down at the bottom. An upward force is applied to the bottom of the piston using hydraulic, pneumatic, or mechanical pressure to push the piston forward or backward, thereby changing the volume inside the reactor to achieve constant pressure. This means that the lid needs to be opened every time the material is poured out. To ensure the accuracy of the test, a leak check is required after each opening and closing of the lid, resulting in wasted test time. Moreover, frequent opening and closing of the lid over a long period of time can easily damage the reactor's seals, reducing the reactor's service life. At the same time, frequent replacement of seals affects experimental efficiency and causes excessive wear and tear on the seals.

[0006] The technical feature of this invention is the adoption of a double-vessel structure, utilizing an outer vessel and an inner vessel. A pressure chamber is integrated between the outer and inner vessels. A piston is installed between the inner wall of the outer vessel and the outer wall of the inner vessel. By applying or releasing hydraulic or pneumatic pressure to the chamber, the stroke of the inner and outer reaction vessels is changed, thereby changing the reaction volume. At the same time, a discharge valve is installed at the bottom of the vessel, which meets the requirement of convenient discharge of variable volume vessels and solves the problem of completely discharging liquid material without opening the lid. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a variable volume reactor. This solves the problem that variable volume reactors, which use a piston at the bottom that can move up and down to change the volume and achieve constant pressure, require opening the lid every time materials are poured. After opening and closing the lid, leak checks are necessary, leading to wasted testing time. Furthermore, frequent opening and closing of the lid damages the reactor's seals, reducing its lifespan. Frequent seal replacements also affect experimental efficiency and cause excessive wear and tear on the seals.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a variable volume reactor, comprising:

[0009] The outer vessel body has a discharge port at its bottom.

[0010] The inner vessel body is slidably connected to the outer vessel body;

[0011] A lid is installed above the inner vessel body, and the inner vessel body and the lid are fixed together by a sealing ring.

[0012] A stirrer is installed on the lid of the vessel. A stirring shaft is provided at the bottom of the stirrer and inserted into the inner vessel body. A stirring paddle is sleeved on the stirring shaft and is located in the inner vessel body.

[0013] An adjustment unit is installed on the outer vessel body. The adjustment unit includes an air inlet pipe installed on the outer peripheral wall of the outer vessel body. The outer vessel body integrates a chamber. An upper piston is installed on the inner vessel body. The upper piston divides the chamber in the outer vessel body into two independent active chambers and passive chambers. The air inlet pipe is connected to the active chamber. The outer vessel body is provided with an air inlet and an air outlet, which are connected to the passive chamber.

[0014] Preferably, a discharge valve is provided at the bottom of the outer vessel body, which is used to control the opening and closing of the discharge port.

[0015] Preferably, the outer vessel body is provided with a connecting vessel seat inside, and an adjustment cavity is formed between the connecting vessel seat and the outer vessel body. The inner vessel body is inserted into the connecting vessel seat. The volume height of the inner vessel body below the upper piston is the same as the inner height of the connecting vessel seat. A lower piston is provided at the bottom end of the inner vessel body, and the lower piston is radially sealed to the inner wall of the connecting vessel seat.

[0016] Preferably, a first oil seal is installed between the inner vessel body and the connecting vessel seat to provide radial sealing for the inner vessel body, and the first oil seal is located in the connecting vessel seat. A second oil seal is installed between the outer vessel body and the inner vessel body to provide radial sealing for the inner vessel body, and the second oil seal is located in the outer vessel body.

[0017] Preferably, the upper piston is provided with an O-ring, and the O-ring is radially compressed and sealed with the inner wall of the outer vessel body.

[0018] Preferably, the outer peripheral wall of the inner vessel is provided with an upper limit platform, which is located above the upper piston, and the outer peripheral wall of the inner vessel is provided with a lower limit platform, which is located directly above the outer vessel.

[0019] Preferably, the volume height of the lower inner vessel body of the lower limiting platform is the same as the inner height of the outer vessel body, and the lower limiting platform is used to limit the portion of the vessel body below the lower limiting platform to retract into the outer vessel body.

[0020] Preferably, a first valve body, a second valve body, and a pressure sensor are provided above the vessel lid. The first valve body has a liquid inlet that is connected to the interior of the inner vessel body. The second valve body has an air inlet and outlet that are connected to the interior of the inner vessel body. The pressure sensor is connected to the interior of the inner vessel body.

[0021] Preferably, a temperature sensor is provided on the lid of the vessel, and the temperature sensor is inserted into the inner vessel body.

[0022] This invention discloses a variable volume reactor, which has the following beneficial effects:

[0023] This variable-volume reactor achieves pressure regulation by changing the internal space of the reactor through the relative displacement of the outer and inner reactor bodies. Compared with existing technologies that use a piston at the bottom of the reactor to change the internal volume and achieve constant pressure, the existing technology cannot provide a discharge port at the bottom of the reactor body, requiring the lid to be opened every time material is poured. By providing a discharge port, the liquid material in the space formed by the overlapping outer and inner reactor bodies can be discharged. By introducing clean water into the space of the reactor body, the reactor can be thoroughly cleaned to prevent residues from affecting subsequent tests. This avoids the need to open the lid and pour out liquid material every time to ensure complete discharge, which would require leak checks after each opening and closing, affecting experimental efficiency. In addition, frequent opening and closing of the lid will affect the sealing effect of the reactor body, making the reactor seals susceptible to damage and reducing the service life of the reactor. Frequent replacement of seals will also affect experimental efficiency and result in excessive wear and tear on the seals.

[0024] This variable volume reactor, when the pressure inside the reactor needs to be adjusted, pressurizes the active chamber through the air inlet pipe to a level greater than the pressure inside the reactor. This pressure pushes the upper piston on the inner reactor body to move vertically downwards, compressing the volume between the inner and outer reactor bodies, thus reducing the volume of the reactor. When the pressure in the active chamber is less than the pressure inside the reactor, it stretches the volume of the inner and outer reactor bodies, stretching the overlapping space between them, thus increasing the volume of the reactor. When the pressure in the active chamber and the pressure inside the reactor reach equilibrium, the volume inside the reactor remains constant. This completes the function of adjusting the reactor's internal volume and regulating the pressure inside the reactor. Attached Figure Description

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

[0026] Figure 1 This is a schematic diagram of the structure of the present invention;

[0027] Figure 2 This is a top view of the present invention;

[0028] Figure 3 This is a schematic diagram of the internal structure of the maximum volume of the present invention;

[0029] Figure 4 This is a schematic diagram of the minimum volume structure of the present invention;

[0030] Figure 5 This is a schematic diagram of the internal structure of the minimum volume of the present invention;

[0031] Figure 6 This is a schematic diagram of the inner vessel structure of the present invention;

[0032] Figure 7 This is a schematic diagram of the internal structure of the inner vessel of the present invention;

[0033] Figure 8 This is a schematic diagram of the outer vessel structure of the present invention.

[0034] In the diagram: 1. Outer vessel body; 11. Discharge port; 12. Lower discharge valve; 13. Connecting vessel seat; 14. First oil seal seat; 15. Adjustment chamber; 16. Second oil seal seat; 2. Inner vessel body; 21. Upper piston; 22. O-ring; 23. Upper limit platform; 24. Lower piston; 25. Lower limit platform; 3. Vessel cover; 31. Sealing ring; 32. First valve body; 33. Second valve body; 34. Pressure sensor; 4. Stirrer; 41. Stirring shaft; 42. Stirring paddle; 43. Temperature sensor; 5. Adjustment unit; 51. Air inlet pipe; 52. Active chamber; 53. Passive chamber; 54. Inlet and outlet. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] This application provides a variable volume reactor, which solves the problem that variable volume technology uses a piston that can move up and down at the bottom of the reactor to change the volume inside the reactor to achieve constant pressure. This results in the need to open the lid every time the material is poured, and to perform leak checks after opening and closing the lid, which wastes experimental time. In addition, the frequent opening and closing of the lid will easily damage the reactor's seals, reduce the service life of the reactor, and the frequent replacement of seals will affect experimental efficiency and cause excessive wear and tear on the seals. The solution is to pressurize the active chamber 52 through the air inlet pipe 51 to a pressure greater than the pressure inside the reactor when it is necessary to adjust the pressure inside the reactor. The pressure pushes the upper piston 21 on the inner reactor body 2 to move vertically downward to compress the volume between the inner reactor body 2 and the outer reactor body 1, thereby compressing the overlapping space between the two reactor bodies and reducing the internal volume of the reactor.

[0037] When the pressure supplied to the active chamber 52 is less than the pressure inside the vessel, it will stretch the volume of the inner vessel 2 and the outer vessel 1, stretching the overlapping space between the two vessels to increase the internal volume of the vessel. When the pressure of the active chamber 52 and the internal space of the vessel are balanced, the internal volume of the vessel remains fixed. This completes the function of adjusting the internal volume of the vessel and thus regulates the pressure inside the vessel.

[0038] By adjusting the relative displacement of the outer vessel 1 and the inner vessel 2, the internal space of the vessel is changed, thereby regulating the pressure. Compared with the existing technology that uses a piston that moves up and down at the bottom of the reactor to change the volume of the vessel and achieve constant pressure, the existing technology cannot provide a discharge port 11 at the bottom of the reactor body, which requires opening the lid every time material is poured. By providing a discharge port 11, the liquid material in the space formed by the overlapping of the outer vessel 1 and the inner vessel 2 can be discharged. By introducing clean water into the space of the vessel, the reactor can be thoroughly cleaned to prevent residue from affecting the next test. This avoids the need to open the lid 3 to pour out the liquid material every time to ensure clean discharge, which would require leak checking after each opening and closing of the lid, affecting experimental efficiency.

[0039] At the same time, frequent opening of the lid will affect the sealing effect of the reactor body, making the reactor's seals more susceptible to damage and reducing the reactor's service life. In addition, frequent replacement of seals will affect experimental efficiency and cause excessive wear and tear on the seals.

[0040] When the pressure is applied and the upper piston 21 on the inner vessel 2 moves downward vertically to compress the volume between the inner vessel 2 and the outer vessel 1, when the inner vessel 2 moves downward to the bottom, the lower limit platform 25 is in contact with the top end face of the outer vessel 1, and the upper piston 21 is in contact with the top end face of the connecting vessel seat 13. At this time, the internal volume of the outer vessel 1 and the inner vessel 2 is at its minimum.

[0041] When the pressure is reduced, the pressure inside the vessel between the outer vessel 1 and the inner vessel 2 pushes the inner vessel 2 to move vertically upward, increasing the volume between it and the outer vessel 1. When the upper limit platform 23 is in contact with the inner top wall of the outer vessel 1, the internal volume of the outer vessel 1 and the inner vessel 2 is at its maximum.

[0042] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0043] This invention discloses a variable volume reactor.

[0044] According to the appendix Figure 1-8 As shown, it includes:

[0045] The outer vessel body 1 has a discharge port 11 at its bottom end;

[0046] After the test, the liquid material in the space formed by the overlapping of the outer vessel body 1 and the inner vessel body 2 is discharged through the discharge port 11. The reactor is then thoroughly cleaned by introducing clean water into the space to prevent any residue from affecting the next test.

[0047] Furthermore, to avoid the need to open the lid 3 and pour out the liquid material each time in order to ensure complete discharge, which would require leak detection after each opening and closing of the lid and affect experimental efficiency;

[0048] Furthermore, frequent opening of the lid will affect the sealing effect of the reactor body, making the reactor's seals more susceptible to damage and reducing the reactor's service life. At the same time, frequent replacement of seals will affect experimental efficiency and cause excessive wear and tear on the seals.

[0049] Furthermore, each time the experiment is repeated, the contents need to be poured out by opening the lid, which affects the internal environment of the reactor, resulting in poor repeatability and thus affecting the experimental results.

[0050] The inner vessel body 2 is slidably connected to the outer vessel body 1;

[0051] The lid 3 is installed above the inner vessel body 2, and the inner vessel body 2 and the lid 3 are fixed by a sealing ring 31;

[0052] A stirrer 4 is installed on the lid 3. A stirring shaft 41 is provided at the bottom of the stirrer 4. The stirring shaft 41 is inserted into the inner vessel 2. A stirring paddle 42 is sleeved on the stirring shaft 41 and is located in the inner vessel 2.

[0053] The regulating unit 5 is installed on the outer vessel body 1. The regulating unit 5 includes an air inlet pipe 51, which is installed on the outer peripheral wall of the outer vessel body 1. The outer vessel body 1 integrates a chamber. The inner vessel body 2 is provided with an upper piston 21, which divides the chamber in the outer vessel body 1 into two independent active chambers 52 and passive chambers 53. The air inlet pipe 51 is connected to the active chamber 52. The outer vessel body 1 is provided with an air inlet and outlet 54, which is connected to the passive chamber 53.

[0054] Specifically disclosed, when the test begins, the liquid and gas required for the test will be introduced into the outer vessel 1 and the inner vessel 2 to achieve gas-liquid equilibrium. The overlapping space of the outer vessel 1 and the inner vessel 2 forms the vessel interior space, at which time the vessel interior space has an initial pressure.

[0055] Furthermore, when it is necessary to adjust the pressure inside the vessel, the active chamber 52 is pressurized through the air inlet pipe 51 to a pressure greater than that inside the vessel. The pressure pushes the upper piston 21 on the inner vessel body 2 to move vertically downward to compress the volume between it and the outer vessel body 1, thus compressing the overlapping space between the two vessels and reducing the volume inside the vessel.

[0056] Furthermore, when the pressure supplied to the active chamber 52 is less than the pressure inside the vessel, it will stretch the volume of the inner vessel body 2 and the outer vessel body 1, stretching the overlapping space between the two vessels to increase the internal volume of the vessel. When the pressure of the active chamber 52 and the internal space of the vessel are balanced, the internal volume of the vessel remains fixed. Thus, the internal volume adjustment function of the vessel can be completed, thereby achieving the adjustment of the internal pressure of the vessel.

[0057] The bottom of the outer vessel body 1 is provided with a discharge valve 12, which is used to control the opening and closing of the discharge port 11.

[0058] It is particularly important to emphasize that the discharge port 11 is opened by controlling the discharge valve 12 to discharge the liquid inside the outer vessel 1. When it is not necessary to discharge the liquid, the discharge valve 12 is kept closed. When it is necessary to discharge the liquid, the discharge valve 12 is opened to avoid having to open the lid every time the liquid is poured, and to perform a leak check after each opening and closing of the lid, which would affect the efficiency of the experiment.

[0059] Furthermore, each time the experiment is repeated, the contents need to be poured out by opening the lid, which affects the internal environment of the reactor, resulting in poor repeatability and thus affecting the experimental results.

[0060] The outer vessel body 1 is provided with a connecting vessel seat 13 inside. An adjustment cavity 15 is formed between the connecting vessel seat 13 and the outer vessel body 1. The inner vessel body 2 is inserted into the connecting vessel seat 13. The volume height of the inner vessel body 2 below the upper piston 21 is the same as the height inside the connecting vessel seat 13.

[0061] The portion of the inner vessel body 2 below the upper piston 21 is retracted into the connecting vessel seat 13. By adjusting the stroke of the inner vessel body 2 in the outer vessel body 1, the reaction volume is changed, and the system is forced to reach a new equilibrium state by changing the volume.

[0062] The bottom end of the inner vessel body 2 is provided with a lower piston 24, which radially seals with the inner wall of the connecting vessel seat 13, thereby ensuring the sealing between the inner vessel body 2 and the connecting vessel seat 13.

[0063] A first oil seal seat 14 is installed between the inner vessel body 2 and the connecting vessel seat 13 to provide radial sealing for the inner vessel body 2. The first oil seal seat 14 is located in the connecting vessel seat 13. A second oil seal seat 16 is installed between the outer vessel body 1 and the inner vessel body 2 to provide radial sealing for the inner vessel body 2. The second oil seal seat 16 is located in the outer vessel body 1.

[0064] Specifically disclosed, the second oil seal seat 16 installed between the inner vessel body 2 and the outer vessel body 1 isolates the chamber in the outer vessel body 1 from the external environment, effectively preventing external pollutants such as dust, water, chemical liquids, and sand from entering the machine and avoiding corrosion or wear of the parts;

[0065] Furthermore, the first oil seal seat 14 installed between the inner vessel body 2 and the connecting vessel seat 13 isolates the hydraulic liquid or gas in the active chamber 52 and the passive chamber 53, preventing it from entering the regulating chamber 15, thus ensuring that the reaction volume between the outer vessel body 1 and the inner vessel body 2 is isolated and that the experimental results are not affected.

[0066] An O-ring 22 is provided in the upper piston 21, and the O-ring 22 is radially compressed and sealed with the inner wall of the outer vessel body 1.

[0067] It is particularly important to emphasize that through the O-ring 22 between the upper piston 21 and the outer vessel body 1, the O-ring 22 is compressed radially to generate elastic deformation, forming an initial contact pressure and achieving a static seal. When the upper piston 21 is pressurized by the regulating unit 5, the medium pressure pushes the O-ring 22 to deform towards the low-pressure side, making it further close to the sealing surface, forming an adaptive and enhanced sealing effect, completing the isolation of the active cavity 52 and the passive cavity 53, and ensuring the pressure regulation in the active cavity 52.

[0068] Furthermore, by adjusting the pressure in the active chamber 52, the upper piston 21 on the inner vessel 2 is pushed downward vertically to compress the volume between it and the outer vessel 1, or the pressure is reduced to make the upper piston 21 on the inner vessel 2 move upward vertically to increase the volume between it and the outer vessel 1, stretching the overlapping space between the two vessels to increase the internal volume of the vessel, thus completing the internal volume adjustment function and achieving the adjustment of the pressure inside the vessel.

[0069] The outer peripheral wall of the inner vessel 2 is provided with an upper limit platform 23, which is located above the upper piston 21. The outer peripheral wall of the inner vessel 2 is provided with a lower limit platform 25, which is located directly above the outer vessel 1.

[0070] It is particularly important to emphasize that when the upper piston 21 on the inner vessel 2 is pressed down and vertically moves to compress the volume between the inner vessel 2 and the outer vessel 1, when the inner vessel 2 moves down to the bottom, the lower limit platform 25 is in contact with the top end face of the outer vessel 1, and the upper piston 21 is in contact with the top end face of the connecting vessel seat 13. At this time, the internal volume of the outer vessel 1 and the inner vessel 2 is at its minimum.

[0071] Furthermore, when the pressure is reduced, the pressure inside the vessel between the outer vessel 1 and the inner vessel 2 pushes the inner vessel 2 to move vertically upward, increasing the volume between it and the outer vessel 1. When the upper limit platform 23 is in contact with the inner top wall of the outer vessel 1, the internal volume of the outer vessel 1 and the inner vessel 2 is at its maximum.

[0072] The volume height of the lower inner vessel body 2 of the lower limit platform 25 is the same as the inner height of the outer vessel body 1. The lower limit platform 25 is used to limit the portion of the vessel body below the lower limit platform 25 to retract into the outer vessel body 1.

[0073] The bottom of the lower limit platform 25 and the bottom of the inner vessel 2 are two planes that serve as limits to ensure that the inner vessel 2 retracts to the bottom and is in place.

[0074] The upper part of the vessel lid 3 is provided with a first valve body 32, a second valve body 33 and a pressure sensor 34. The first valve body 32 has a liquid inlet that is connected to the inside of the inner vessel body 2. The second valve body 33 has an air inlet and outlet that are connected to the inside of the inner vessel body 2. The pressure sensor 34 is connected to the inside of the inner vessel body 2.

[0075] Furthermore, the liquid is transported to the vessel space between the outer vessel 1 and the inner vessel 2 through the first valve body 32 for gas-liquid phase equilibrium testing;

[0076] Furthermore, the pressure sensor 34 detects the pressure in the vessel space between the outer vessel body 1 and the inner vessel body 2 to observe the internal pressure of the vessel, which facilitates pressure control and determines whether a new equilibrium state has been reached.

[0077] A temperature sensor 43 is installed on the lid 3 and is inserted into the inner vessel body 2. The temperature of the test space in the vessel body is monitored by the temperature sensor 43.

[0078] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A variable volume reactor, characterized in that, include: The outer vessel body (1) has a discharge port (11) at its bottom end. The inner vessel (2) is slidably connected to the outer vessel (1). By the relative displacement of the outer vessel (1) and the inner vessel (2), the space inside the vessel is changed, thereby regulating the pressure and achieving constant pressure. The lid (3) is installed above the inner vessel body (2), and the inner vessel body (2) and the lid (3) are fixed by a sealing ring (31); A stirrer (4) is installed on the lid (3). A stirring shaft (41) is provided at the bottom of the stirrer (4). The stirring shaft (41) is inserted into the inner pot body (2). A stirring paddle (42) is sleeved on the stirring shaft (41). The stirring paddle (42) is located in the inner pot body (2). An adjustment unit (5) is installed on the outer vessel body (1). The adjustment unit (5) includes an air inlet pipe (51), which is installed on the outer peripheral wall of the outer vessel body (1). The outer vessel body (1) integrates a chamber. An upper piston (21) is provided on the inner vessel body (2). The upper piston (21) divides the chamber in the outer vessel body (1) into two independent active chambers (52) and passive chambers (53). The air inlet pipe (51) is connected to the active chamber (52). An air inlet and outlet (54) is provided on the outer vessel body (1). The air inlet and outlet (54) is connected to the passive chamber (53). The outer vessel body (1) is provided with a connecting vessel seat (13) inside. An adjustment cavity (15) is formed between the connecting vessel seat (13) and the outer vessel body (1). The inner vessel body (2) is inserted into the connecting vessel seat (13). The volume height of the inner vessel body (2) below the upper piston (21) is the same as the inner height of the connecting vessel seat (13). The bottom end of the inner vessel body (2) is provided with a lower piston (24). The lower piston (24) is radially sealed to the inner wall of the connecting vessel seat (13). A variable volume reactor is a gas-liquid two-phase equilibrium reactor.

2. The variable volume reactor according to claim 1, characterized in that, The bottom of the outer vessel body (1) is provided with a discharge valve (12), which is used to control the opening and closing of the discharge port (11).

3. A variable volume reactor according to claim 1, characterized in that, A first oil seal (14) is installed between the inner vessel body (2) and the connecting vessel seat (13) to provide radial sealing for the inner vessel body (2). The first oil seal (14) is located in the connecting vessel seat (13). A second oil seal (16) is installed between the outer vessel body (1) and the inner vessel body (2) to provide radial sealing for the inner vessel body (2). The second oil seal (16) is located in the outer vessel body (1).

4. A variable volume reactor according to claim 1, characterized in that, The upper piston (21) is provided with an O-ring (22), and the O-ring (22) is radially compressed and sealed with the inner wall of the outer vessel body (1).

5. A variable volume reactor according to claim 1, characterized in that, The outer peripheral wall of the inner vessel body (2) is provided with an upper limit platform (23), which is located above the upper piston (21). The outer peripheral wall of the inner vessel body (2) is provided with a lower limit platform (25), which is located directly above the outer vessel body (1).

6. A variable volume reactor according to claim 5, characterized in that, The volume height of the lower inner vessel body (2) of the lower limiting platform (25) is the same as the inner height of the outer vessel body (1). The lower limiting platform (25) is used to limit the portion of the vessel body below the lower limiting platform (25) to retract into the outer vessel body (1).

7. A variable volume reactor according to claim 1, characterized in that, The lid (3) of the vessel is provided with a first valve body (32), a second valve body (33) and a pressure sensor (34). The first valve body (32) has a liquid inlet that is connected to the inside of the inner vessel body (2). The second valve body (33) has an air inlet and an air outlet that is connected to the inside of the inner vessel body (2). The pressure sensor (34) is connected to the inside of the inner vessel body (2).

8. A variable volume reactor according to claim 1, characterized in that, A temperature sensor (43) is provided on the lid (3), and the temperature sensor (43) is inserted into the inner body (2).

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