Separation system for organic mixture

Abstract

According to the organic mixture separation system, by arranging the liquid level pipe and the density ball, the water content in the organic mixture storage device can be monitored in real time, then the first signal is sent to the control module through the first switch, and the control module starts the electromagnetic valve according to the received first signal; excessive water in the organic mixture storage device is discharged in time, so that the water is prevented from flowing back to the cathode side of the electrolytic cell, the influence on hydrogenation reaction and catalyst activity is reduced, the continuity of the hydrogenation reaction is kept, and the hydrogenation reaction efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of organic liquid hydrogen storage technology, and more specifically, to a separation system for organic mixtures. Background Technology

[0002] The PEM electrolysis water production hydrogen production coupled with LOHC hydrogenation process has attracted widespread attention due to its high conversion efficiency. Its principle is to couple PEM electrolysis water production with organic liquid hydrogenation, directly storing hydrogen from the water in liquid organic matter through a chemical reaction, thus transforming the liquid hydrogen-poor organic matter into liquid hydrogen-rich organic matter.

[0003] However, during this process, due to the characteristics of the proton exchange membrane, as the electrolysis reaction proceeds, some water will permeate from the anode of the electrolyzer to the cathode, forming an organic mixture with the organic matter at the cathode, and then flowing into the liquid organic matter storage tank. As the electrolysis-hydrogenation reaction continues, more and more water will be added to the organic matter, and the excess water will flow back to the cathode side of the electrolyzer, causing the reaction to shift towards the generation of the original hydrogen-poor organic matter or reducing the catalyst activity, thereby affecting the continuity of the hydrogenation reaction and reducing the efficiency of the hydrogenation reaction. Utility Model Content

[0004] To address the aforementioned issues, this application provides a separation system for organic mixtures. By incorporating a level tube and a density ball, the system can monitor the water content within the organic mixture storage device in real time. A first signal is then sent to a control module via a first switch. Based on the received first signal, the control module activates a solenoid valve to promptly drain excess water from the organic mixture storage device, preventing water backflow to the cathode side of the electrolyzer, reducing its impact on the hydrogenation reaction and catalyst activity, maintaining the continuity of the hydrogenation reaction, and improving the efficiency of the hydrogenation reaction.

[0005] This application provides a separation system for an organic mixture, the separation system comprising: an organic mixture storage device (1), a liquid level pipe (2), and a control module (3); the organic mixture storage device (1) is used to store two liquid substances of different densities;

[0006] The organic mixture storage device (1) is connected to the liquid level tube (2), wherein the first end (21) and the second end (22) of the liquid level tube (2) are located at different heights of the organic mixture storage device (1), and the first end (21) and the second end (22) are in communication with the interior of the organic mixture storage device (1), so that two liquid substances of different densities enter the liquid level tube (2) from the first end (21) and the second end (22) respectively;

[0007] A first switch (23) and a second switch (24) are connected between the first end (21) and the second end (22) of the liquid level tube (2). A density ball (25) is provided inside the liquid level tube (2). The density ball (25) is configured to slide between the first switch (23) and the second switch (24). The position of the density ball (25) represents the boundary line between two liquid substances of different densities stored in the organic mixture storage device (1). The first switch (23) and the second switch (24) are respectively connected to the first end and the second end of the control module (3).

[0008] The bottom of the organic mixture storage device (1) is connected to a drain pipe (11), and a solenoid valve (111) is connected to the drain pipe (11). The solenoid valve (111) is connected to the third end of the control module (3), and the solenoid valve (111) is normally closed.

[0009] The first switch (23) is configured to transmit a first signal to the control module (3) in response to the density ball (25) rising to a first preset position; the second switch (24) is configured to transmit a second signal to the control module (3) in response to the density ball (25) falling to a second preset position.

[0010] The control module (3) is configured to, in response to the first signal, control the solenoid valve (111) to open so as to discharge the dense liquid substance in the organic mixture storage device (1) along the drain pipe (11); and, in response to the second signal, control the solenoid valve (111) to close so as to block the drain pipe (11).

[0011] The distance between the first preset position and the second preset position is 2 cm to 5 cm.

[0012] Optionally, the liquid level tube (2) includes: a first connecting tube (26), a second connecting tube (27), and a third connecting tube (28) connected in sequence;

[0013] The first connecting pipe (26) and the third connecting pipe (28) are vertically connected to the organic mixture storage device (1);

[0014] The two ends of the second connecting pipe (27) are perpendicularly connected to the first connecting pipe (26) and the third connecting pipe (28) respectively, and the second connecting pipe (27) is parallel to the organic mixture storage device (1) in the vertical direction;

[0015] The first switch (23) and the second switch (24) are connected to the second connecting pipe (27), with the first switch (23) located above the second switch (24).

[0016] Optionally, the separation system further includes an electrolytic cell (4), the bottom of which is connected to a diaphragm metering pump (41), the inlet end of which is connected to an inlet pipe (42), and the end of the inlet pipe (42) away from the diaphragm metering pump (41) extends into the organic mixture storage device (1) for transporting liquid substances with lower density to the electrolytic cell (4);

[0017] The diaphragm metering pump (41) is connected to the fourth end of the control module (3), and the control module (3) is configured to control the diaphragm metering pump (41) to open or close.

[0018] Optionally, the distance between one end of the liquid inlet pipe (42) extending into the organic mixture storage device (1) and the first end (21) is 3cm to 5cm.

[0019] Optionally, the separation system further includes a cooling device (5);

[0020] The air inlet of the cooling device (5) is connected to the electrolytic cell (4), and the liquid outlet is connected to the first liquid outlet pipe (51). One end of the first liquid outlet pipe (51) extends into the organic mixture storage device (1) to condense the gaseous organic mixture sent out by the electrolytic cell (4) and then transport it to the organic mixture storage device (1) for storage.

[0021] The distance between the end of the first outlet pipe (51) that extends into the organic mixture storage device (1) and the first end (21) is 2 cm to 3 cm.

[0022] Optionally, the cooling device (5) includes a first cooler (52) and a second cooler (53);

[0023] The air inlet of the first cooler (52) is connected to the electrolytic cell (4), and the liquid outlet is connected to the first liquid outlet pipe (51).

[0024] The air inlet of the second cooler (53) is connected to the organic mixture storage device (1), and the liquid outlet is connected to the second liquid outlet pipe (54). One end of the second liquid outlet pipe (54) extends into the organic mixture storage device (1) to condense a small amount of gaseous organic mixture escaping from the organic mixture storage device (1) and then transport it to the organic mixture storage device (1) for storage.

[0025] The distance between the end of the second outlet pipe (54) that extends into the organic mixture storage device (1) and the first end (21) is 8 cm to 10 cm.

[0026] Optionally, the first cooler (52) and the second cooler (53) have cavities inside, and condenser tubes (55) are provided inside the cavities;

[0027] One end of the condenser tube (55) of the first cooler (52) is connected to the electrolytic cell (4), and the other end is connected to the first liquid outlet tube (51);

[0028] One end of the condenser tube (55) of the second cooler (53) is connected to the organic mixture storage device (1), and the other end is connected to the second liquid outlet tube (54);

[0029] The first cooler (52) and the second cooler (53) are respectively provided with water inlets (56) at their lower ends and water outlets (57) at their upper ends, for conveying cooling water to the cavity through the water inlets (56), cooling the condenser tube (55), and then discharging it through the water outlets (57).

[0030] Optionally, a filter device (531) is provided inside the second cooler (53);

[0031] The filter device (531) is connected to one end of the condenser (55) and one end of the second liquid outlet pipe (54) respectively, and is used to filter the condensed liquid organic matter.

[0032] Optionally, the filter device (531) includes a first part (5311) and a second part (5312), wherein the first part (5311) and the second part (5312) form a T-shape;

[0033] The first part (5311) is connected to one end of the condenser (55), and the end of the second part (5312) away from the first part (5311) is connected to one end of the second liquid outlet pipe (54).

[0034] Optionally, an exhaust pipe (532) is connected to the filter device (531), and one end of the exhaust pipe (532) away from the filter device (531) extends out of the second cooler (53).

[0035] Beneficial technical effects:

[0036] This application provides a separation system for organic mixtures. A level tube is installed on the organic mixture storage device, allowing two liquid substances of different densities to enter the tube through a first end and a second end, respectively. The height of the boundary between the two liquid substances of different densities is monitored by the level tube and a density ball inside the tube. A first switch senses the density ball reaching a first preset position and transmits a first signal to a control module. The control module then activates a solenoid valve, opening a drain pipe to promptly discharge the high-density liquid substance (i.e., excess water) from the organic mixture storage device. This prevents excess water from entering the cathode side of the electrolyzer, reducing its impact on the hydrogenation reaction and catalyst activity, and improving the hydrogenation reaction efficiency. When a second switch senses the density ball reaching a second preset position, a second signal is transmitted to the control module. The control module then closes the solenoid valve, returning it to its normally closed state to block the drain pipe, preventing the discharge of the lower-density liquid substance and avoiding resource waste. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 A schematic diagram of the separation system proposed in an embodiment of this application is shown;

[0039] Figure 2 A schematic diagram of the structure of the filtering device proposed in the embodiments of this application is shown.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Organic mixture storage device; 11. Drain pipe; 111. Solenoid valve;

[0042] 2. Liquid level tube; 21. First end; 22. Second end; 23. First switch; 24. Second switch; 25. Density ball; 26. First connecting pipe; 27. Second connecting pipe; 28. Third connecting pipe;

[0043] 3. Control module;

[0044] 4. Electrolytic cell; 41. Diaphragm metering pump; 42. Inlet pipe;

[0045] 5. Cooling device; 51. First liquid outlet pipe; 52. First cooler; 53. Second cooler; 531. Filter device; 5311. First part; 5312. Second part; 532. Exhaust pipe; 54. Second liquid outlet pipe; 55. Condenser pipe; 56. Water inlet; 57. Water outlet. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] In the accompanying drawings, the size of constituent elements, the thickness of layers, or areas may sometimes be exaggerated for clarity. Therefore, any implementation of this disclosure is not necessarily limited to the dimensions shown in the drawings, and the shapes and sizes of the components in the drawings do not reflect true proportions. Furthermore, the drawings schematically illustrate ideal examples, and any implementation of this disclosure is not limited to the shapes or values ​​shown in the drawings.

[0048] In the related technology, in the PEM electrolysis water production hydrogen production coupled LOHC hydrogenation process, due to the characteristics of the proton exchange membrane, as the hydrogen production reaction proceeds, some water will permeate from the anode of the electrolyzer to the cathode, forming a mixture that flows into the liquid organic matter storage tank. As the hydrogenation reaction continues, more and more water in the organic matter will accumulate, and the excess water is likely to flow back to the cathode side of the electrolyzer, thus affecting the continuity of the hydrogenation reaction.

[0049] To address the aforementioned issues, this application provides an organic mixture separation system. By incorporating a level pipe, a first switch, a second switch, a density ball, and a solenoid valve, the control module controls the solenoid valve to open or close based on received first and second signals. This allows water in the organic mixture storage device to be automatically and promptly discharged, preventing excessive water from flowing back to the cathode side of the electrolytic cell, reducing the impact on the continuity of the hydrogenation reaction, and improving the efficiency of the hydrogenation reaction.

[0050] See Figure 1 , Figure 1 A schematic diagram of the separation system proposed in an embodiment of this application is shown. The separation system includes: an organic mixture storage device 1, a liquid level pipe 2, and a control module 3; the organic mixture storage device 1 is used to store two liquid substances of different densities.

[0051] The organic mixture storage device 1 is connected to the liquid level tube 2, wherein the first end 21 and the second end 22 of the liquid level tube 2 are located at different heights of the organic mixture storage device 1, and the first end 21 and the second end 22 are in communication with the interior of the organic mixture storage device 1, so that two liquid substances of different densities enter the liquid level tube 2 from the first end 21 and the second end 22 respectively.

[0052] A first switch 23 and a second switch 24 are connected between the first end 21 and the second end 22 of the liquid level tube 2. A density ball 25 is disposed inside the liquid level tube 2 and is configured to slide between the first switch 23 and the second switch 24. The position of the density ball 25 represents the boundary line between two liquid substances of different densities stored in the organic mixture storage device 1. The first switch 23 and the second switch 24 are respectively connected to the first end and the second end of the control module 3.

[0053] The bottom of the organic mixture storage device 1 is connected to a drain pipe 11, and a solenoid valve 111 is connected to the drain pipe 11. The solenoid valve 111 is connected to the third end of the control module 3, and the solenoid valve 111 is normally closed.

[0054] The first switch 23 is configured to transmit a first signal to the control module 3 in response to the density ball 25 rising to a first preset position; the second switch 24 is configured to transmit a second signal to the control module 3 in response to the density ball 25 falling to a second preset position.

[0055] The control module 3 is configured to, in response to the first signal, control the solenoid valve 111 to open so as to discharge the denser liquid substance in the organic mixture storage device 1 along the drain pipe 11; and, in response to the second signal, control the solenoid valve 111 to close so as to block the drain pipe 11.

[0056] The distance between the first preset position and the second preset position is 2 cm to 5 cm.

[0057] It should be noted that the organic mixture storage device 1 is a liquid organic storage tank with corrosion resistance and high temperature resistance.

[0058] The two liquid substances with different densities in the organic liquid hydrogen storage process specifically include: liquid organic matter and water; wherein, the liquid organic matter includes, but is not limited to, toluene, N-ethylindole, N-methylindole, pyrazine, 2,3-dimethylpyrazine and 2,5-dimethylpyrazine;

[0059] The first end 21 of the liquid level tube 2 is higher than the second end 22, and the second end 22 is connected to the organic mixture storage device 1 near the bottom.

[0060] The density sphere 25 has a density between that of liquid organic matter and water. The boundary line between the liquid organic matter and water in the liquid level tube is horizontally aligned with the boundary line between the liquid organic matter and water in the organic mixture storage device 1. Therefore, the density sphere 25 can be used to characterize the position of the boundary line between the liquid organic matter and water in the organic mixture storage device 1.

[0061] The first preset position refers to the upper safe water level set near the first end 21 of the liquid level tube 2. When the density ball 25 reaches this position, it indicates that there is too much water in the organic mixture storage device 1 and it needs to be drained.

[0062] The second preset position refers to the lower safe water level set near the second end 22 of the liquid level tube 2. When the density ball 25 reaches this position, it indicates that there is less water in the organic mixture storage device 1 and it does not need to be drained.

[0063] The distance between the first preset position and the second preset position is used to characterize the distance between the maximum water level and the minimum water level in the organic mixture storage device 1.

[0064] The first switch 23 and the second switch 24 both refer to a type of sensor. The first switch 23 is used to sense when the density ball 25 reaches the first preset position and send the first signal to the control module 3.

[0065] The second switch 24 is used to sense when the density ball 25 reaches the second preset position and send the second signal to the control module 3;

[0066] The first switch 23 is connected to the first end of the control module 3, the second switch 24 is connected to the second end of the control module 3, and the solenoid valve 111 is connected to the third end of the control module 3 via signal lines.

[0067] The first signal is an electrical signal that instructs the control module 3 to start the solenoid valve 111;

[0068] The second signal is an electrical signal that instructs control module 3 to close solenoid valve 111.

[0069] In practice, toluene (or other liquid organic matter) and water in the organic mixture storage device 1 enter through the first end 21 and the second end 22 of the liquid level pipe 2, respectively. The density ball 25 slides upward as the water volume increases. When the density ball 25 reaches the first preset position, it indicates that the water content has reached the threshold. The first switch 23 sends a first signal to the control module 3. The control module 3 responds to the first signal by activating the solenoid valve 111 to open the drain pipe 11, so that the water in the organic mixture storage device 1 is automatically discharged along the drain pipe 11. As the water volume decreases, the density ball 25 slides downward. When the density ball 25 drops to the second preset position, it indicates that the water content has decreased to a safe range. The second switch 24 sends a second signal to the control module 3. The control module 3 responds to the second signal by closing the solenoid valve 111 and blocking the drain pipe 11. This avoids unnecessary drainage and prevents toluene (or other liquid organic matter) in the organic mixture storage device 1 from flowing out along the drain pipe 11.

[0070] By setting up a level tube 2, a density ball 25, a first switch 23, and a second switch 24, the water content in the organic mixture storage device 1 can be automatically monitored. Then, the control module 3 controls the solenoid valve 111 to open or close, which can automatically discharge excess water in a timely manner and ensure that toluene (or other liquid organic matter) is stored in the organic mixture storage device 1. This effectively solves the problem of excessive water backflow in the storage tank in the existing process, which affects the hydrogenation reaction and catalyst activity. It helps to maintain the stable operation of the PEM electrolysis water production hydrogen production coupled LOHC hydrogenation process and improve the efficiency of the hydrogenation reaction.

[0071] In some embodiments, see Figure 1 The liquid level pipe 2 includes: a first connecting pipe 26, a second connecting pipe 27 and a third connecting pipe 28 connected in sequence;

[0072] The first connecting pipe 26 and the third connecting pipe 28 are perpendicularly connected to the organic mixture storage device 1;

[0073] The two ends of the second connecting pipe 27 are perpendicularly connected to the first connecting pipe 26 and the third connecting pipe 28, respectively, and the second connecting pipe 27 is parallel to the organic mixture storage device 1 in the vertical direction;

[0074] The first switch 23 and the second switch 24 are connected to the second connecting pipe 27, with the first switch 23 located above the second switch 24.

[0075] In practice, the first connecting pipe 26 and the second connecting pipe 27, and the third connecting pipe 28 and the second connecting pipe 27 are fixedly connected by metal right-angle joints;

[0076] The first end 21 of the liquid level tube 2 is the end that is connected to the organic mixture storage device 1 via the first connecting tube 26;

[0077] The second end 22 is the end that connects the third connecting pipe 28 to the organic mixture storage device 1.

[0078] By setting the first connecting pipe 26 and the third connecting pipe 28 to be perpendicularly connected to the organic mixture storage device 1, and the second connecting pipe 27 to be parallel to the organic mixture storage device 1, the movement of the density ball 25 in the liquid level tube 2 can be made more stable, reducing misjudgments caused by liquid fluctuations or vibrations, and enabling more accurate monitoring of changes in water content in the organic mixture storage device 1.

[0079] The second connecting pipe 27, as the main part of the liquid level pipe 2, is perpendicularly connected at both ends to the first connecting pipe 26 and the third connecting pipe 28, forming a "T" shape, which makes drainage smoother when the solenoid valve 111 is opened. At the same time, since the second connecting pipe 27 is parallel to the organic mixture storage device 1, drainage will not interfere with the liquid distribution in the organic mixture storage device 1, ensuring the continuity of the process.

[0080] The first switch 23 and the second switch 24 are connected to the second connecting pipe 27, with the first switch 23 located above the second switch 24. This allows the separation system to more accurately determine the upper and lower limits of water content based on the position change of the density ball 25, thereby controlling the opening and closing of the solenoid valve 111. This helps maintain the stable operation of the process and prevents process interruption or efficiency reduction due to excessively high or low water content.

[0081] In some embodiments, see Figure 1 The separation system also includes an electrolytic cell 4, the bottom of which is connected to a diaphragm metering pump 41. The inlet end of the diaphragm metering pump 41 is connected to an inlet pipe 42. One end of the inlet pipe 42 away from the diaphragm metering pump 41 extends into the organic mixture storage device 1 to transport liquid substances with lower density into the electrolytic cell 4.

[0082] The diaphragm metering pump 41 is connected to the fourth terminal of the control module 3, and the control module 3 is configured to control the diaphragm metering pump 41 to open or close.

[0083] It should be noted that the end of the inlet pipe 42 away from the diaphragm metering pump 41 extends vertically into the bottom of the organic mixture storage device 1, and the inlet of the inlet pipe 42 is located above the boundary line between the two liquid substances of different densities.

[0084] The diaphragm metering pump 41 is connected to the fourth terminal of the control module 3 via a power cord.

[0085] In practice, the diaphragm metering pump 41 draws toluene (or other organic matter) to the cathode side of the electrolyzer 4 through the inlet pipe 42, where it reacts with the hydrogen produced by the electrolysis of water in the electrolyzer 4 to achieve integrated hydrogen production and storage, which facilitates operation and subsequent system maintenance.

[0086] By utilizing structures such as the level pipe 2 in the separation system, the changes in water content in the organic mixture storage device 1 are monitored in real time, and water is automatically drained in a timely manner to prevent water from flowing back to the cathode side of the electrolyzer 4, which helps to maintain the normal operation of the electrolyzer 4 and the hydrogenation reaction.

[0087] In some embodiments, see Figure 1 The distance between the end of the liquid inlet pipe 42 that extends into the organic mixture storage device 1 and the first end 21 is 3cm to 5cm.

[0088] By limiting the distance between the inlet pipe 42 and the first end 21, it is ensured that when the density ball 25 slides up to the first preset position, the inlet of the inlet pipe 42 is still above the boundary line between toluene (or other organic matter) and water, thus preventing water from flowing back to the electrolytic cell 4 along the inlet pipe 42 and the diaphragm metering pump 41.

[0089] In practice, the liquid inlet pipe 42 extends into one end of the organic mixture storage device 1, 3 cm to 5 cm above the highest boundary between toluene (or other organic matter) and water in the organic mixture storage device 1.

[0090] In some embodiments, see Figure 1 The separation system also includes a cooling device 5;

[0091] The air inlet of the cooling device 5 is connected to the electrolytic cell 4, and the liquid outlet is connected to a first liquid outlet pipe 51. One end of the first liquid outlet pipe 51 extends into the organic mixture storage device 1 and is used to condense the gaseous organic mixture sent out by the electrolytic cell 4 and then transport it to the organic mixture storage device 1 for storage.

[0092] The distance between the end of the first outlet pipe 51 that extends into the organic mixture storage device 1 and the first end 21 is 2 cm to 3 cm.

[0093] It should be noted that the air inlet of the cooling device 5 is connected to the upper end of the electrolytic cell 4 in order to collect the gaseous organic mixture discharged from the electrolytic cell 4.

[0094] The end of the first liquid outlet pipe 51 furthest from the cooling device 5 is connected to the upper end of the organic mixture storage device 1;

[0095] The gaseous organic mixture includes gaseous toluene (or other organic matter), gaseous methylcyclohexane (or other hydrogenated organic matter), hydrogen, and water vapor; after condensation, liquid toluene (or other organic matter), liquid gaseous methylcyclohexane (or other hydrogenated organic matter), and water flow into the organic mixture storage device 1 for storage.

[0096] The distance between the end of the first outlet pipe 51 that extends into the organic mixture storage device 1 and the first end 21 is 2 cm to 3 cm, which helps to reduce the generation and escape of bubbles.

[0097] In practice, by setting up a cooling device 5, the high-temperature gaseous organic mixture generated by the electrolytic cell 4 can be received in a timely manner, realizing the liquefaction of the gaseous organic mixture and the effective separation of the liquefied organic mixture. The whole process has the advantages of low energy consumption and simple operation.

[0098] In some embodiments, see Figure 1The cooling device 5 includes a first cooler 52 and a second cooler 53;

[0099] The air inlet of the first cooler 52 is connected to the electrolytic cell 4, and the liquid outlet is connected to the first liquid outlet pipe 51.

[0100] The air inlet of the second cooler 53 is connected to the organic mixture storage device 1, and the liquid outlet is connected to the second liquid outlet pipe 54. One end of the second liquid outlet pipe 54 extends into the organic mixture storage device 1 and is used to condense a small amount of gaseous organic mixture escaping from the organic mixture storage device 1 and then transport it to the organic mixture storage device 1 for storage.

[0101] The distance between the end of the second outlet pipe 54 that extends into the organic mixture storage device 1 and the first end 21 is 8 cm to 10 cm.

[0102] It should be noted that the air inlet of the first cooler 52 is connected to the upper end of the electrolytic cell 4;

[0103] Small amounts of gaseous organic mixtures include hydrogen, small amounts of gaseous toluene (or other organic compounds), and water vapor.

[0104] In practice, after the first cooler 52 condenses the liquid toluene (or other organic matter), liquid methylcyclohexane (or other hydrogenated organic matter), hydrogen, and water, it is sent to the organic mixture storage device 1. Since toluene is volatile, when hydrogen is discharged, a small amount of gaseous toluene (or other organic matter) will be carried out. This part of the gaseous organic mixture is sent to the second cooler 53 for condensation, so that the toluene (or other organic matter) is liquefied, and then returned to the organic mixture storage device 1 along the second liquid outlet pipe 54 to reduce resource waste.

[0105] In some embodiments, see Figure 1 The first cooler 52 and the second cooler 53 have cavities inside, and condenser tubes 55 are provided inside the cavities;

[0106] One end of the condenser tube 55 of the first cooler 52 is connected to the electrolytic cell 4, and the other end is connected to the first liquid outlet tube 51;

[0107] One end of the condenser tube 55 of the second cooler 53 is connected to the organic mixture storage device 1, and the other end is connected to the second liquid outlet tube 54;

[0108] The first cooler 52 and the second cooler 53 are respectively provided with water inlet 56 at their lower ends and water outlet 57 at their upper ends, for conveying cooling water to the cavity through the water inlet 56, cooling the condenser tube 55 and then discharging it through the water outlet 57.

[0109] In specific implementation, the condenser tube 55 is spiral-shaped and is respectively arranged in the cavities of the first cooler 52 and the second cooler 53 to increase the flow time of the gaseous organic mixture in the first cooler 52 and the second cooler 53, thereby enhancing the cooling effect.

[0110] The upper end of the condenser tube 55 in the first cooler 52 is connected to the upper end of the electrolytic cell 4, and the lower end is connected to the upper end of the first liquid outlet tube 51.

[0111] The upper end of the condenser 55 in the second cooler 53 is connected to the upper end of the organic mixture storage device, and the lower end is connected to the upper end of the second liquid outlet pipe 54.

[0112] Cooling water enters the cavity through inlet 56, flows upward to cool the condenser tube 55, and finally exits through outlet 57. The cooling water temperature in the first cooler is set to 0 ℃~5 ℃; the cooling water temperature in the second cooler is set to 0 ℃~5 ℃.

[0113] In some embodiments, see Figure 1 The second cooler 53 is equipped with a filter device 531;

[0114] The filter device 531 is connected to one end of the condenser 55 and one end of the second liquid outlet pipe 54, respectively, and is used to filter the condensed liquid organic matter.

[0115] It should be noted that the filter device 531 is installed at the bottom of the cavity inside the second cooler 53.

[0116] In practice, a small amount of gaseous organic mixture is condensed by the second cooler 53 to obtain liquid toluene (or other organic matter) and hydrogen. This mixture is then transported to the filter device 531 for filtration, which further separates the hydrogen and liquid toluene (or other organic matter) to enhance the separation effect.

[0117] In some embodiments, see Figure 1 and Figure 2 The filter device 531 includes a first part 5311 and a second part 5312, which form a T-shape.

[0118] The first part 5311 is connected to one end of the condenser tube 55, and the end of the second part 5312 away from the first part 5311 is connected to one end of the second liquid outlet tube 54.

[0119] In practice, the first part 5311 is connected to the lower end of the condenser tube 55;

[0120] The second part 5312 is connected to the end of the second outlet pipe 54 that is away from the organic mixture storage device 1.

[0121] By setting the filter device 531 to a T-shaped structure, the flow rate of the organic mixture entering the filter can be slowed down, thereby improving the filtration efficiency.

[0122] In some embodiments, see Figure 1 The filter device 531 is connected to an exhaust pipe 532, and one end of the exhaust pipe 532 that is away from the filter device 531 extends out of the second cooler 53.

[0123] In practice, the upper end of the filter device 531 is connected to the exhaust pipe 532 to facilitate the discharge of the filtered and separated hydrogen gas from the second cooler 53.

[0124] The following detailed description of an organic mixture separation system provided in this application is based on specific embodiments.

[0125] Example 1

[0126] Step 1: Control module 3 starts each diaphragm metering pump 41. The diaphragm metering pump 41 delivers toluene in the organic mixture storage device 1 to the cathode side of the electrolytic cell 4 through the liquid inlet pipe 42, where it reacts with the hydrogen generated by the electrolysis of water on the anode side.

[0127] Step 2: As the hydrogenation reaction proceeds, the gaseous toluene, gaseous methylcyclohexane, hydrogen and water vapor formed in the electrolytic cell 4 are discharged through the upper outlet and then enter the condenser tube 55 in the first cooler 52. Cooling water at a temperature of 0 °C is sent into the cavity through the inlet 56 to condense the material in the condenser tube 55. The liquid toluene, water and methylcyclohexane obtained after condensation are sent downward through the first liquid outlet tube 51 into the organic mixture storage tank for storage.

[0128] Step 3: Hydrogen and a small amount of gaseous toluene enter the condenser tube 55 of the second cooler 53 from the top of the organic mixture storage tank. Cooling water at 0 °C is sent into the cavity through the inlet 56 to condense the gaseous toluene in the condenser tube 55. The resulting liquid toluene and hydrogen enter the filter device 531 downwards and pass through the first part 5311 and the second part 5312 in sequence. The liquid toluene enters the organic mixture storage tank through the second outlet pipe 54 for storage, and the hydrogen is discharged upwards from the second cooler 53 through the exhaust pipe 532.

[0129] Step 4: As the hydrogenation reaction continues, the amount of water in the organic mixture storage tank increases, causing the density ball 25 to slide upward until it reaches the first preset position. After the first switch 23 senses it, it transmits the first signal to the control module 3. The control module 3 responds to the first signal, starts the solenoid valve 111, and opens the drain pipe 11 to drain the excess water from the organic mixture storage tank.

[0130] Step 5: After drainage, the boundary between toluene and water in the liquid level pipe 2 gradually decreases, causing the density ball 25 to slide downwards until it slides to the second preset position. After the second switch 24 senses it, it transmits the second signal to the control module 3. The control module 3 responds to the first signal, closes the solenoid valve 111, and blocks the drain pipe 11 to prevent toluene and methylcyclohexane from being discharged along the drain pipe 11.

[0131] Step 6: Repeat the above steps until the hydrogenation reaction is complete.

[0132] In summary, the organic mixture separation system provided in this application, by installing a level pipe on the organic mixture storage device, can monitor the water content in the storage device in a timely manner. Then, by sending signals to the control module through the first switch and the second switch, the control module activates the solenoid valve to automatically discharge excess water in a timely manner. This effectively solves the problem of excessive water seeping into the cathode of the electrolytic cell, affecting the hydrogenation reaction and reducing the activity of the catalyst, ensuring the continuous operation of the hydrogenation reaction and improving the efficiency of the hydrogenation reaction.

[0133] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0134] Although preferred embodiments of the present application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present application.

[0135] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0136] The separation system for organic mixtures provided in this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A separation system for organic mixtures, characterized in that, The separation system includes: an organic mixture storage device (1), a liquid level pipe (2), and a control module (3); the organic mixture storage device (1) is used to store two liquid substances of different densities; The organic mixture storage device (1) is connected to the liquid level tube (2), wherein the first end (21) and the second end (22) of the liquid level tube (2) are located at different heights of the organic mixture storage device (1), and the first end (21) and the second end (22) are in communication with the interior of the organic mixture storage device (1), so that two liquid substances of different densities enter the liquid level tube (2) from the first end (21) and the second end (22) respectively; A first switch (23) and a second switch (24) are connected between the first end (21) and the second end (22) of the liquid level tube (2). A density ball (25) is provided inside the liquid level tube (2). The density ball (25) is configured to slide between the first switch (23) and the second switch (24). The position of the density ball (25) represents the boundary line between two liquid substances of different densities stored in the organic mixture storage device (1). The first switch (23) and the second switch (24) are respectively connected to the first end and the second end of the control module (3). The bottom of the organic mixture storage device (1) is connected to a drain pipe (11), and a solenoid valve (111) is connected to the drain pipe (11). The solenoid valve (111) is connected to the third end of the control module (3), and the solenoid valve (111) is normally closed. The first switch (23) is configured to transmit a first signal to the control module (3) in response to the density ball (25) rising to a first preset position; the second switch (24) is configured to transmit a second signal to the control module (3) in response to the density ball (25) falling to a second preset position. The control module (3) is configured to, in response to the first signal, control the solenoid valve (111) to open so as to discharge the dense liquid substance in the organic mixture storage device (1) along the drain pipe (11); and, in response to the second signal, control the solenoid valve (111) to close so as to block the drain pipe (11). The distance between the first preset position and the second preset position is 2 cm to 5 cm.

2. The separation system for organic mixtures according to claim 1, characterized in that, The liquid level tube (2) includes: a first connecting tube (26), a second connecting tube (27) and a third connecting tube (28) connected in sequence; The first connecting pipe (26) and the third connecting pipe (28) are vertically connected to the organic mixture storage device (1); The two ends of the second connecting pipe (27) are perpendicularly connected to the first connecting pipe (26) and the third connecting pipe (28) respectively, and the second connecting pipe (27) is parallel to the organic mixture storage device (1) in the vertical direction; The first switch (23) and the second switch (24) are connected to the second connecting pipe (27), with the first switch (23) located above the second switch (24).

3. The separation system for organic mixtures according to claim 1, characterized in that, The separation system also includes an electrolytic cell (4), the bottom of which is connected to a diaphragm metering pump (41), the inlet end of which is connected to an inlet pipe (42), and the end of the inlet pipe (42) away from the diaphragm metering pump (41) extends into the organic mixture storage device (1) for transporting liquid substances with lower density to the electrolytic cell (4). The diaphragm metering pump (41) is connected to the fourth end of the control module (3), and the control module (3) is configured to control the diaphragm metering pump (41) to open or close.

4. The separation system for organic mixtures according to claim 3, characterized in that, The distance between the end of the liquid inlet pipe (42) that extends into the organic mixture storage device (1) and the first end (21) is 3cm to 5cm.

5. The separation system for organic mixtures according to any one of claims 1 to 4, characterized in that, The separation system also includes a cooling device (5); The air inlet of the cooling device (5) is connected to the electrolytic cell (4), and the liquid outlet is connected to the first liquid outlet pipe (51). One end of the first liquid outlet pipe (51) extends into the organic mixture storage device (1) to condense the gaseous organic mixture sent out by the electrolytic cell (4) and then transport it to the organic mixture storage device (1) for storage. The distance between the end of the first outlet pipe (51) that extends into the organic mixture storage device (1) and the first end (21) is 2 cm to 3 cm.

6. The separation system for organic mixtures according to claim 5, characterized in that, The cooling device (5) includes a first cooler (52) and a second cooler (53); The air inlet of the first cooler (52) is connected to the electrolytic cell (4), and the liquid outlet is connected to the first liquid outlet pipe (51). The air inlet of the second cooler (53) is connected to the organic mixture storage device (1), and the liquid outlet is connected to the second liquid outlet pipe (54). One end of the second liquid outlet pipe (54) extends into the organic mixture storage device (1) to condense a small amount of gaseous organic mixture escaping from the organic mixture storage device (1) and then transport it to the organic mixture storage device (1) for storage. The distance between the end of the second outlet pipe (54) that extends into the organic mixture storage device (1) and the first end (21) is 8 cm to 10 cm.

7. The separation system for organic mixtures according to claim 6, characterized in that, The first cooler (52) and the second cooler (53) have cavities inside, and condenser tubes (55) are provided inside the cavities; One end of the condenser tube (55) of the first cooler (52) is connected to the electrolytic cell (4), and the other end is connected to the first liquid outlet tube (51); One end of the condenser tube (55) of the second cooler (53) is connected to the organic mixture storage device (1), and the other end is connected to the second liquid outlet tube (54); The first cooler (52) and the second cooler (53) are respectively provided with water inlets (56) at their lower ends and water outlets (57) at their upper ends, for conveying cooling water to the cavity through the water inlets (56), cooling the condenser tube (55), and then discharging it through the water outlets (57).

8. The separation system for organic mixtures according to claim 7, characterized in that, The second cooler (53) is equipped with a filter device (531); The filter device (531) is connected to one end of the condenser (55) and one end of the second liquid outlet pipe (54) respectively, and is used to filter the condensed liquid organic matter.

9. The separation system for organic mixtures according to claim 8, characterized in that, The filter device (531) includes a first part (5311) and a second part (5312), which form a T-shape. The first part (5311) is connected to one end of the condenser (55), and the end of the second part (5312) away from the first part (5311) is connected to one end of the second liquid outlet pipe (54).

10. The separation system for organic mixtures according to claim 8, characterized in that, The filter device (531) is connected to an exhaust pipe (532), and the end of the exhaust pipe (532) away from the filter device (531) extends out of the second cooler (53).

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