CO2 phase equilibrium test device

Abstract

The utility model discloses a CO2 phase equilibrium test device, which relates to the technical field of test devices, including a reactor, a bottom plate, and a U-shaped plate fixedly arranged on the upper surface of the bottom plate, a CO2 analyzer fixedly arranged on the top of the U-shaped plate, the CO2 analyzer matches the reactor, a sealing cover is arranged on the top of the reactor, a height adjustment mechanism is arranged inside the U-shaped plate, the sealing cover is transmission-connected with the height adjustment mechanism, a driving mechanism is fixedly arranged on the top of the U-shaped plate, and the height adjustment mechanism is transmission-connected with the driving mechanism. The utility model has a simple test process and a short test time, and can calculate the solubility of CO2 in a MEA reference solution at 40°C and a partial pressure of 15kPa.

Description

Technical Field

[0001] The utility model relates to the technical field of testing devices, in particular to a CO2 phase equilibrium testing device. Background Art

[0002] Supercritical fluid CO2 has become an important green solvent to replace organic solvents due to its unique physical and chemical properties. It has important practical uses in chemistry, chemical industry, food, pharmaceuticals, materials and other fields. The phase equilibrium of supercritical fluid systems and the determination of solute solubility have always been one of the research areas.

[0003] In the process of realizing the present application, the applicant found that the existing testing device has a complex structure and testing process, and the detection time is long, which limits the research on phase equilibrium and solute solubility determination in supercritical fluid systems. Utility Model Content

[0004] In view of the problems existing in the above-mentioned existing CO2 phase equilibrium testing device, the present utility model is proposed.

[0005] Therefore, the purpose of the utility model is to provide a CO2 phase equilibrium testing device, which solves the problems of the existing testing devices having complex structure and testing process, long detection time, and limiting the research on phase equilibrium and solute solubility determination in supercritical fluid systems.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A CO2 phase equilibrium testing device comprises a reactor, a bottom plate and a U-shaped plate fixedly arranged on the upper surface of the bottom plate, a CO2 analyzer is fixedly arranged on the top of the U-shaped plate, the CO2 analyzer matches the reactor, a sealing cover is arranged on the top of the reactor, a height adjustment mechanism is arranged inside the U-shaped plate, the sealing cover is transmission-connected with the height adjustment mechanism, a driving mechanism is fixedly arranged on the top of the U-shaped plate, and the height adjustment mechanism is transmission-connected with the driving mechanism;

[0008] The upper surface of the sealing cover is symmetrically fixed with a first buffer tank and a second buffer tank, the tops of the first buffer tank and the second buffer tank are fixedly penetrated with an air inlet pipe with a first regulating valve and a first pressure gauge, the side walls of the first buffer tank and the second buffer tank are fixedly penetrated with a first air guide pipe, the pipe wall of each of the first air guide pipes is provided with a second regulating valve, the other end of each of the first air guide pipes is fixedly connected to a bellows, and the other end of each of the bellows is fixedly connected to a second air guide pipe fixedly penetrated inside the reactor;

[0009] A vacuum pump matching the interior of the reactor is fixedly provided on one side outer wall of the reactor, and a temperature-adjustable circulating water bath is fixedly provided on one side outer wall of the U-shaped plate, and the circulating water bath matches the interior of the reactor.

[0010] Preferably, the height adjustment mechanism includes two fixed plates and two screw rods symmetrically arranged inside the U-shaped plate, the two fixed plates are symmetrically fixed on the inner wall of the U-shaped plate, each of the screw rods is rotatably arranged between the U-shaped plate and the corresponding fixed plate, the rod wall of each of the screw rods is threaded with a slider, and each of the sliders is fixedly connected to the sealing cover.

[0011] Preferably, the driving mechanism includes a rotating rod, two first bevel gears and two second bevel gears, the rod walls at both ends of the rotating rod are rotatably connected to a mounting plate fixedly connected to the U-shaped plate, the two first bevel gears are fixedly sleeved on the rod walls of the rotating rod and are respectively meshed with the corresponding second bevel gears, and the two second bevel gears are respectively fixedly provided with the upper ends of the corresponding screw rods.

[0012] Preferably, two support blocks are symmetrically fixed at the bottom of the reactor, and two slide grooves are symmetrically opened on the upper surface of the bottom plate. A plurality of balls are rotatably arranged inside each of the slide grooves, and each of the balls is in contact and connected with the bottom of the support block.

[0013] Preferably, a second pressure gauge matching the interior of the reactor is fixedly provided on the top of the sealing cover.

[0014] Preferably, a motor is fixedly mounted on one side of one of the mounting plates, and an output end of the motor passes through the corresponding mounting plate and is fixedly connected to an end of a corresponding rotating rod.

[0015] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0016] The utility model, when in use, CO2 enters the first buffer tank through the corresponding first regulating valve, N2 enters the second buffer tank through the corresponding second regulating valve, and stops when the pressure inside the first buffer tank and the second buffer tank is about 400kPa; weigh about 25mL, 30% MEA solvent and put it into the reactor; start the circulating heating water bath, set the temperature to 40℃, start the magnetic stirring of the reactor; start the condensation cycle, set the temperature to 5℃; start the vacuum pump to extract the air in the reactor, replace it with N2 twice, and evacuate to 10kPa again;

[0017] After the temperature stabilizes, CO2 is slowly introduced from the first buffer tank through the corresponding second regulating valve for multiple times until the pressure of the reactor rises to 25kPa; the second buffer tank is opened, and N2 is slowly introduced into the reactor through the corresponding second regulating valve for multiple times until the pressure rises to 100kPa; the CO2 analyzer pump circulation is turned on, and after stabilization, the reactor pressure, the first buffer tank pressure, and the CO2 analyzer data are read, and the solvent sample of the reactor is extracted and the CO2 loading amount therein is titrated;

[0018] Based on the above data, the solubility of C02 in MEA reference solution at 40°C and 15kPa partial pressure was calculated. Compared with the literature value, the error is <5%. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] Figure 2 For the utility model Figure 1 A magnified schematic diagram of part A;

[0022] Figure 3 For the utility model Figure 1 An enlarged schematic diagram of part B.

[0023] Description of reference numerals:

[0024] 1. Reactor; 2. Bottom plate; 3. U-shaped plate; 4. CO2 analyzer; 5. Sealing cover; 6. First buffer tank; 7. Second buffer tank; 8. Air inlet pipe; 9. First pressure gauge; 10. First air duct; 11. Second air duct; 12. Vacuum pump; 13. Circulating water bath; 14. Fixed plate; 15. Screw; 16. Slider; 17. Rotating rod; 18. First bevel gear; 19. Second bevel gear; 20. Mounting plate; 21. Support block; 22. Ball; 23. Second pressure gauge; 24. Motor. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0026] The utility model embodiment discloses a CO2 phase equilibrium testing device.

[0027] Embodiment 1

[0028] The utility model provides Figure 1-3 The CO2 phase equilibrium test device shown comprises a reactor 1, a bottom plate 2 and a U-shaped plate 3 fixedly arranged on the upper surface of the bottom plate 2, a CO2 analyzer 4 is fixedly arranged on the top of the U-shaped plate 3, the CO2 analyzer 4 matches the reactor 1, a sealing cover 5 is arranged on the top of the reactor 1, a height adjustment mechanism is arranged inside the U-shaped plate 3, the sealing cover 5 is transmission-connected with the height adjustment mechanism, a driving mechanism is fixedly arranged on the top of the U-shaped plate 3, and the height adjustment mechanism is transmission-connected with the driving mechanism;

[0029] The upper surface of the sealing cover 5 is symmetrically fixedly provided with a first buffer tank 6 and a second buffer tank 7. An air inlet pipe 8 with a first regulating valve and a first pressure gauge 9 are fixedly penetrated on the top of the first buffer tank 6 and the second buffer tank 7. A first air guide pipe 10 is fixedly penetrated on the side walls of the first buffer tank 6 and the second buffer tank 7. A second regulating valve is provided on the pipe wall of each first air guide pipe 10. A bellows is fixedly connected to the other end of each first air guide pipe 10. The other end of each bellows is fixedly connected to a second air guide pipe 11 fixedly penetrated inside the reactor 1. CO2 and N2 can be stored respectively through the first buffer tank 6 and the second buffer tank 7, and can be transported to the inside of the reactor 1 through the corresponding first air guide pipe 10 and the second air guide pipe 11 respectively.

[0030] A vacuum pump 12 matching the interior of the reactor 1 is fixedly provided on one side outer wall of the reactor 1, and a temperature-adjustable circulating water bath 13 is fixedly provided on one side outer wall of the U-shaped plate 3. The circulating water bath 13 matches the interior of the reactor 1. By setting the temperature-adjustable circulating water bath 13, water bath treatment of different temperatures inside the reactor 1 can be achieved, and a rubber hose is used for the pipeline connected to the reactor 1 so that the reactor 1 can be disassembled and assembled.

[0031] like Figure 1 As shown, the height adjustment mechanism includes two fixed plates 14 and two screw rods 15 symmetrically arranged inside the U-shaped plate 3. The two fixed plates 14 are symmetrically fixed on the inner wall of the U-shaped plate 3. Each screw rod 15 is rotatably arranged between the U-shaped plate 3 and the corresponding fixed plate 14. The rod wall of each screw rod 15 is threadedly sleeved with a slider 16. Each slider 16 is fixedly connected to the sealing cover 5. By threading the two screw rods 15 and the corresponding sliders 16, the height of the sealing cover 5 can be adjusted during the rotation of the two screw rods 15, so as to open or close the sealing cover 5.

[0032] like Figure 1As shown, the driving mechanism includes a rotating rod 17, two first bevel gears 18 and two second bevel gears 19. The rod walls at both ends of the rotating rod 17 are rotatably connected to a mounting plate 20 fixedly connected to the U-shaped plate 3. The two first bevel gears 18 are fixedly sleeved on the rod walls of the rotating rod 17 and are respectively meshed with the corresponding second bevel gears 19. The two second bevel gears 19 are respectively fixedly provided with the upper ends of the corresponding screw rods 15. Through the meshing connection between the two first bevel gears 18 and the second bevel gears 19, the two screw rods 15 can be driven to rotate synchronously during the rotation of the rotating rod 17, thereby realizing the driving of the height adjustment mechanism.

[0033] Embodiment 2

[0034] Based on the first embodiment, Figure 3 As shown, two support blocks 21 are symmetrically fixedly arranged at the bottom of the reactor 1, and two slide grooves are symmetrically opened on the upper surface of the bottom plate 2. A plurality of balls 22 are rotatably arranged inside each slide groove, and each ball 22 is in contact and connected with the bottom of the support block 21. By fixing two support blocks 21 at the bottom of the reactor 1 and a plurality of balls 22 arranged inside each slide groove, the reactor 1 can be easily disassembled and assembled.

[0035] Embodiment 3

[0036] Based on the first embodiment, Figure 2 As shown, a second pressure gauge 23 matching the interior of the reactor 1 is fixedly disposed on the top of the sealing cover 5 . The second pressure gauge 23 can be used to monitor the pressure inside the reactor 1 .

[0037] Embodiment 4

[0038] Based on the first embodiment, Figure 1 As shown, a motor 24 is fixedly provided on one side of one of the mounting plates 20, and the output end of the motor 24 passes through the corresponding mounting plate 20 and is fixedly connected to the end of the corresponding rotating rod 17. By setting the motor 24, the output end of the motor 24 can be used to drive the rotating rod 17 to rotate after starting the motor 24, thereby realizing the driving of the driving mechanism.

[0039] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A CO2 phase equilibrium test device, comprising a reaction kettle (1), a bottom plate (2), and a U-shaped plate (3) fixedly arranged on the upper surface of the bottom plate (2), characterized in that: A CO2 analyzer (4) is fixedly arranged on the top of the U-shaped plate (3), and the CO2 analyzer (4) matches the reactor (1). A sealing cover (5) is arranged on the top of the reactor (1). A height adjustment mechanism is arranged inside the U-shaped plate (3), and the sealing cover (5) is in transmission connection with the height adjustment mechanism. A driving mechanism is fixedly arranged on the top of the U-shaped plate (3), and the height adjustment mechanism is in transmission connection with the driving mechanism. A first buffer tank (6) and a second buffer tank (7) are symmetrically fixedly arranged on the upper surface of the sealing cover (5); an air inlet pipe (8) with a first regulating valve and a first pressure gauge (9) are fixedly penetrated on the top of each of the first buffer tank (6) and the second buffer tank (7); a first air guide pipe (10) is fixedly penetrated on the side wall of each of the first buffer tank (6) and the second buffer tank (7); a second regulating valve is provided on the pipe wall of each of the first air guide pipes (10); the other end of each of the first air guide pipes (10) is fixedly connected to a bellows; the other end of each of the bellows is fixedly connected to a second air guide pipe (11) fixedly penetrated inside the reactor (1); A vacuum pump (12) matching the interior of the reactor (1) is fixedly provided on one side outer wall of the reactor (1), and a temperature-adjustable circulating water bath (13) is fixedly provided on one side outer wall of the U-shaped plate (3), wherein the circulating water bath (13) matches the interior of the reactor (1).

2. The CO2 phase equilibrium testing device according to claim 1, characterized in that: The height adjustment mechanism comprises two fixed plates (14) and two screw rods (15) symmetrically arranged inside the U-shaped plate (3); the two fixed plates (14) are symmetrically fixedly arranged on the inner wall of the U-shaped plate (3); each screw rod (15) is rotatably arranged between the U-shaped plate (3) and the corresponding fixed plate (14); a slider (16) is threadedly sleeved on the rod wall of each screw rod (15); and each slider (16) is fixedly connected to the sealing cover (5).

3. The CO2 phase equilibrium testing device according to claim 1, characterized in that: The driving mechanism comprises a rotating rod (17), two first bevel gears (18) and two second bevel gears (19); the rod walls at both ends of the rotating rod (17) are rotatably connected to a mounting plate (20) fixedly connected to the U-shaped plate (3); the two first bevel gears (18) are fixedly sleeved on the rod walls of the rotating rod (17) and are respectively meshed and connected with the corresponding second bevel gears (19); the two second bevel gears (19) are respectively fixedly provided with the upper ends of the corresponding screw rods (15).

4. The CO2 phase equilibrium testing device according to claim 1, characterized in that: Two support blocks (21) are symmetrically fixedly arranged at the bottom of the reaction kettle (1), and two slide grooves are symmetrically opened on the upper surface of the bottom plate (2), and a plurality of balls (22) are rotatably arranged inside each of the slide grooves, and each of the balls (22) is in contact and connected with the bottom of the support block (21).

5. The CO2 phase equilibrium testing device according to claim 1, characterized in that: A second pressure gauge (23) matching the interior of the reaction kettle (1) is fixedly arranged on the top of the sealing cover (5).

6. The CO2 phase equilibrium testing device according to claim 3, characterized in that: A motor (24) is fixedly arranged on one side of one of the mounting plates (20), and an output end of the motor (24) passes through the corresponding mounting plate (20) and is fixedly connected to the end of the corresponding rotating rod (17).

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