A high-speed liquid-liquid extraction device
By designing multi-layer trays and pre-separation packing, countercurrent flow of the continuous and dispersed phases is achieved. Hydrophobic and hydrophilic units are used to accelerate droplet coalescence, which solves the problems of high solvent consumption and low separation efficiency in existing liquid-liquid extraction equipment, and improves solute recovery rate and separation effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING TAISIPU CHEM ENG TECH CO LTD
- Filing Date
- 2025-07-17
- Publication Date
- 2026-06-30
AI Technical Summary
Existing liquid-liquid extraction equipment suffers from problems such as high solvent consumption, high regeneration energy consumption, insufficient driving force when the density difference is small, slow separation efficiency, and easy emulsification.
A multi-layer tray structure is adopted, combined with pre-separation packing of hydrophobic and hydrophilic units, to achieve countercurrent flow of the continuous phase and the dispersed phase. The selective adsorption of hydrophilic and hydrophobic components accelerates droplet coalescence, and the flow resistance between the packing gaps provides the initial separation driving force, thus realizing multi-stage extraction.
It significantly improves solute recovery rate, reduces solvent consumption, solves the problems of high extraction solvent consumption and high regeneration energy consumption, and improves separation efficiency and reduces emulsification when density difference is small.
Smart Images
Figure CN224422012U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of extraction and separation technology, and in particular to a high-speed liquid-liquid extraction device. Background Technology
[0002] Liquid-liquid extraction is a separation technique based on the difference in solubility of substances in different solvents. It uses selective solvents to transfer target components from a mixture to another phase, achieving efficient separation or enrichment. Its core principle is "like dissolves like," relying on the density difference between the continuous and dispersed phases for separation. It is widely used in chemical, pharmaceutical, and environmental protection fields. Currently, the main liquid-liquid extraction equipment includes packed towers and sieve tray towers.
[0003] However, conventional liquid-liquid extraction equipment has the following drawbacks in practical use: First, it consumes a lot of extraction solvent and has high regeneration energy consumption. Second, when the density difference between the light and heavy phases and the dispersed phase is small, there is insufficient driving force, slow separation efficiency, and easy emulsification. Furthermore, conventional equipment cannot separate some density differences that are too small (e.g., <0.05 g / cm³), and centrifugation or mechanical assistance is required. Therefore, this utility model proposes a high-speed liquid-liquid extraction device to solve the problems existing in the prior art. Utility Model Content
[0004] To address the aforementioned problems, this invention proposes a high-speed liquid-liquid extraction device. This device employs multi-layer trays to achieve multi-stage extraction, significantly improving solute recovery rate and reducing solvent consumption, thus solving the problems of high solvent consumption and high regeneration energy consumption.
[0005] To achieve the purpose of this utility model, the utility model is implemented through the following technical solution: a high-speed liquid-liquid extraction device, including a shell and a plurality of extraction components disposed inside the shell, wherein a dispersed phase inlet and a continuous phase inlet are respectively provided at the bottom and top of one side of the shell, and a first outlet and a second outlet are respectively provided at the bottom and top of one side of the shell.
[0006] The extraction assembly includes a high-speed sieve tray, a receiving tray, and a downcomer. The receiving tray is located at both ends of the high-speed sieve tray, and the downcomer is located on one side of the high-speed sieve tray. The high-speed sieve tray is equipped with pre-separation packing.
[0007] A further improvement is that the pre-separation packing includes a hydrophobic unit and a hydrophilic unit, with the hydrophobic unit located above the high-speed sieve tray and the hydrophilic unit located below the high-speed sieve tray.
[0008] A further improvement is that a perforated tray is provided at the top inside the shell, and a support ring is connected between the bottom of the perforated tray and the shell.
[0009] A further improvement is that the shell is composed of multiple sets of tubes, and adjacent sets of tubes are fixed together by flanges and bolts.
[0010] A further improvement is that a boundary gauge interface is provided on the housing located below the second discharge port, and the boundary gauge interface is used to connect the boundary gauge.
[0011] A further improvement is that a sampling port is provided on the shell below the continuous phase feed inlet, and a valve is provided on the sampling port.
[0012] A further improvement is that a pressure measuring port is connected to the housing at the position between the dispersed phase inlet and the sampling port, and a pressure gauge is connected to the pressure measuring port.
[0013] The beneficial effects of this utility model are as follows:
[0014] 1. This invention uses countercurrent flow of the continuous phase and the dispersed phase in opposite directions to maximize mass transfer efficiency. When the dispersed phase reaches a certain high-speed sieve tray, it is ejected at high speed through the process holes on the tray. The droplets fully contact the continuous phase flowing through the tray, and the target solute is transferred from the dispersed phase to the continuous phase. The dispersed phase droplets flow with the continuous phase, which is repelled by the hydrophobic unit. The droplets then flow through the downcomer to the next tray, repeating the dispersion-contact-mass transfer process. Multi-layer trays enable multi-stage extraction, significantly improving solute recovery rate, reducing solvent consumption, and solving the problems of high solvent consumption and high regeneration energy consumption.
[0015] 2. In the pre-separation packing of this utility model, the hydrophilic unit adsorbs continuous phase droplets, while the hydrophobic unit repels the continuous phase, thus helping the droplets to coalesce; the hydrophobic unit adsorbs dispersed phase droplets, while the hydrophilic unit repels the dispersed phase, thus accelerating coalescence. Through selective adsorption of hydrophilic and hydrophobic components, the tiny droplets coalesce in advance, reducing emulsification. At the same time, the flow resistance between the packing gaps is used to provide a preliminary separation driving force for two phases with small density differences. In summary, when the density difference between the light and heavy phases and the dispersed phase is small, the problems of insufficient driving force, slow separation efficiency, and easy emulsification are solved. Attached Figure Description
[0016] Figure 1 This is the front view of the present invention;
[0017] Figure 2 This is a cross-sectional schematic diagram of the extraction component of this utility model.
[0018] The components are: 1. Shell; 2. Dispersed phase inlet; 3. Continuous phase inlet; 4. First outlet; 5. Second outlet; 6. High-speed sieve tray; 7. Liquid receiving tray; 8. Downcomer; 9. Hydrophobic unit; 10. Hydrophilic unit; 11. Sieve tray; 12. Support ring; 13. Flange; 14. Interface gauge interface; 15. Sampling port; 16. Pressure gauge. Detailed Implementation
[0019] To deepen the understanding of this utility model, the following detailed description will be provided in conjunction with embodiments. These embodiments are only used to explain this utility model and do not constitute a limitation on the scope of protection of this utility model.
[0020] Example 1
[0021] according to Figure 1 , 2 As shown, this embodiment proposes a high-speed liquid-liquid extraction device, including a shell 1 and several sets of extraction components disposed inside the shell 1. A dispersed phase inlet 2 and a continuous phase inlet 3 are respectively provided on the lower and upper sides of one side of the shell 1, and a first outlet 4 and a second outlet 5 are respectively provided on the bottom and top of one side of the shell 1.
[0022] The extraction assembly includes a high-speed perforated tray 6, a receiving tray 7, and a downcomer 8. The receiving tray 7 is located at both ends of the high-speed perforated tray 6, and the downcomer 8 is located on one side of the high-speed perforated tray 6. The high-speed perforated tray 6 is equipped with pre-separation packing. In operation, the dispersed phase enters the equipment through the dispersed phase inlet 2. Because it needs to pass through the perforated sieve of the high-speed perforated tray 6 at high speed, its feed pressure is slightly higher. The continuous phase enters through the continuous phase inlet 3 and flows countercurrently to the dispersed phase, maximizing mass transfer efficiency. When the dispersed phase reaches a certain layer of the high-speed perforated tray 6, it is ejected at high speed through the "process holes" on the tray (due to the small size of the holes and the pressure difference, it forms tiny droplets). The droplets come into full contact with the continuous phase flowing through the tray (the droplets have a large surface area, resulting in high mass transfer efficiency), and the target solute is transferred from the dispersed phase to the continuous phase. Dispersed phase droplets flow with the continuous phase, which is repelled by the hydrophobic units. The continuous phase then flows through downcomer 8 to the next tray, repeating the dispersion-contact-mass transfer process. This multi-layer tray system achieves "multi-stage extraction," significantly improving solute recovery and reducing solvent consumption. The pre-separation packing on each high-speed sieve tray 6 plays a crucial role: hydrophilic units 10 adsorb continuous phase droplets, while hydrophobic units 9 repel the continuous phase, aiding droplet aggregation; conversely, hydrophobic units adsorb dispersed phase droplets, while hydrophilic units repel the dispersed phase, accelerating aggregation. This structure solves the problem of small density differences (<0.05 g / cm³) or easy emulsification: through selective hydrophilic and hydrophobic adsorption, tiny droplets aggregate in advance, reducing emulsification, while the flow resistance between the packing gaps provides initial separation impetus for two phases with small density differences. After multi-stage extraction and pre-separation, the two phases form a clear interface at the top and bottom of the equipment due to their density difference (monitored in real time by an interface level gauge): the less dense phase is discharged from the second outlet 5 at the top of the shell 1 and enters the subsequent solvent regeneration process; the more dense phase is discharged from the first outlet 4 at the bottom of the shell 1. The interface level gauge monitors the interface height and uses feedback to control the feed rate or the opening of the discharge valve to ensure complete separation of the two phases (avoiding the entrainment of the other phase during discharge).
[0023] The pre-separation packing includes hydrophobic units 9 and hydrophilic units 10. The hydrophobic units 9 are located above the high-speed sieve tray 6, and the hydrophilic units 10 are located below the high-speed sieve tray 6. In the pre-separation packing, the hydrophilic units 10 adsorb continuous phase droplets, while the hydrophobic units 9 repel the continuous phase, thus aiding droplet aggregation. The hydrophobic units adsorb dispersed phase droplets, while the hydrophilic units repel the dispersed phase, accelerating aggregation. This structure solves the problem of small density differences (<0.05 g / cm³) or easy emulsification: through selective hydrophilic and hydrophobic adsorption, tiny droplets aggregate in advance, reducing emulsification. At the same time, the flow resistance between the packing gaps provides initial separation driving force for two phases with small density differences. In summary, for light and heavy phases and dispersed phases with small density differences, it solves the problems of insufficient driving force, slow separation efficiency, and easy emulsification.
[0024] The top of the interior of the shell 1 is provided with a perforated tray 11, and a support ring 12 is connected between the bottom of the perforated tray 11 and the shell 1. The low-density phase is discharged from the second outlet 5 at the top of the shell 1, passes through the perforated tray 11 and is ejected at high speed to enter the subsequent solvent regeneration process. The support ring 12 is used to improve the stability of the perforated tray 11.
[0025] The housing 1 consists of multiple sets of tubes, and adjacent sets of tubes are fixed together by flanges 13 and bolts. In use, the multiple sets of tubes are fixed together by flanges 13 and bolts according to the needs of the liquid-liquid extraction process, adapting to different application scenarios.
[0026] Example 2
[0027] according to Figure 1 , 2 As shown, this embodiment proposes a high-speed liquid-liquid extraction device, including a shell 1 and several sets of extraction components disposed inside the shell 1. A dispersed phase inlet 2 and a continuous phase inlet 3 are respectively provided on the lower and upper sides of one side of the shell 1, and a first outlet 4 and a second outlet 5 are respectively provided on the bottom and top of one side of the shell 1.
[0028] The extraction assembly includes a high-speed perforated tray 6, a receiving tray 7, and a downcomer 8. The receiving tray 7 is located at both ends of the high-speed perforated tray 6, and the downcomer 8 is located on one side of the high-speed perforated tray 6. The high-speed perforated tray 6 is equipped with pre-separation packing. In operation, the dispersed phase enters the equipment through the dispersed phase inlet 2. Because it needs to pass through the perforated sieve of the high-speed perforated tray 6 at high speed, its feed pressure is slightly higher. The continuous phase enters through the continuous phase inlet 3 and flows countercurrently to the dispersed phase, maximizing mass transfer efficiency. When the dispersed phase reaches a certain layer of the high-speed perforated tray 6, it is ejected at high speed through the "process holes" on the tray (due to the small size of the holes and the pressure difference, it forms tiny droplets). The droplets come into full contact with the continuous phase flowing through the tray (the droplets have a large surface area, resulting in high mass transfer efficiency), and the target solute is transferred from the dispersed phase to the continuous phase. Dispersed phase droplets flow with the continuous phase, which is repelled by the hydrophobic units. The continuous phase then flows through downcomer 8 to the next tray, repeating the dispersion-contact-mass transfer process. This multi-layer tray system achieves "multi-stage extraction," significantly improving solute recovery and reducing solvent consumption. The pre-separation packing on each high-speed sieve tray 6 plays a crucial role: hydrophilic units 10 adsorb continuous phase droplets, while hydrophobic units 9 repel the continuous phase, aiding droplet aggregation; conversely, hydrophobic units adsorb dispersed phase droplets, while hydrophilic units repel the dispersed phase, accelerating aggregation. This structure solves the problem of small density differences (<0.05 g / cm³) or easy emulsification: through selective hydrophilic and hydrophobic adsorption, tiny droplets aggregate in advance, reducing emulsification, while the flow resistance between the packing gaps provides initial separation impetus for two phases with small density differences. After multi-stage extraction and pre-separation, the two phases form a clear interface at the top and bottom of the equipment due to their density difference (monitored in real time by an interface level gauge): the less dense phase is discharged from the second outlet 5 at the top of the shell 1 and enters the subsequent solvent regeneration process; the more dense phase is discharged from the first outlet 4 at the bottom of the shell 1. The interface level gauge monitors the interface height and uses feedback to control the feed rate or the opening of the discharge valve to ensure complete separation of the two phases (avoiding the entrainment of the other phase during discharge).
[0029] The pre-separation packing includes hydrophobic units 9 and hydrophilic units 10. The hydrophobic units 9 are located above the high-speed sieve tray 6, and the hydrophilic units 10 are located below the high-speed sieve tray 6. In the pre-separation packing, the hydrophilic units 10 adsorb continuous phase droplets, while the hydrophobic units 9 repel the continuous phase, thus aiding droplet aggregation. The hydrophobic units adsorb dispersed phase droplets, while the hydrophilic units repel the dispersed phase, accelerating aggregation. This structure solves the problem of small density differences (<0.05 g / cm³) or easy emulsification: through selective hydrophilic and hydrophobic adsorption, tiny droplets aggregate in advance, reducing emulsification. At the same time, the flow resistance between the packing gaps provides initial separation driving force for two phases with small density differences. In summary, for light and heavy phases and dispersed phases with small density differences, it solves the problems of insufficient driving force, slow separation efficiency, and easy emulsification.
[0030] A boundary level gauge interface 14 is provided on the housing 1 located below the second discharge port 5, and the boundary level gauge interface 14 is used to connect the boundary level gauge. A sampling port 15 is provided on the housing 1 located below the continuous phase inlet 3, and the sampling port 15 is equipped with a valve. A pressure measuring port is connected to the housing 1 located between the dispersed phase inlet 2 and the sampling port 15, and a pressure gauge 16 is connected to the pressure measuring port. Finally, the oil phase (light phase) floats to the top, and the water phase (heavy phase) sinks to the bottom. The boundary level gauge monitors the oil-water interface height in real time and controls the opening of the top oil discharge valve to ensure that the oil phase is pure and free of water carryover. The boundary level gauge monitors the position of the two-phase interface in real time to ensure stable separation effect. A flow meter can be installed on the first discharge port 4. The flow meter and the sampling port 15 are used to monitor the flow rate and sample analysis, and the pressure gauge 16 is used to measure the pressure inside the housing 1 to optimize operating parameters.
[0031] This high-speed liquid-liquid extraction equipment uses countercurrent flow of the continuous phase and the dispersed phase in opposite directions to maximize mass transfer efficiency. When the dispersed phase reaches a certain high-speed sieve tray 6, it is ejected at high speed through the process holes on the tray. The droplets fully contact the continuous phase flowing through the tray, and the target solute is transferred from the dispersed phase to the continuous phase. The dispersed phase droplets flow with the continuous phase, which is repelled by the hydrophobic unit. Then, it flows through the downcomer 8 to the next tray, repeating the above dispersion-contact-mass transfer process. Multi-layer trays realize multi-stage extraction, which greatly improves the solute recovery rate, reduces solvent consumption, and solves the problems of high solvent consumption and high regeneration energy consumption. Furthermore, in the pre-separation packing, hydrophilic units 10 adsorb continuous phase droplets, while hydrophobic units 9 repel the continuous phase, thus aiding droplet aggregation; hydrophobic units adsorb dispersed phase droplets, while hydrophilic units repel the dispersed phase, accelerating aggregation. This structure solves the problem of small density differences (<0.05 g / cm³) or easy emulsification: through selective adsorption of hydrophilic and hydrophobic components, tiny droplets are allowed to aggregate in advance, reducing emulsification. At the same time, the flow resistance between the packing gaps provides initial separation driving force for two phases with small density differences. In summary, when the density difference between the light and heavy phases and the dispersed phase is small, the problem of insufficient driving force, slow separation efficiency, and easy emulsification is solved.
[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A high-speed liquid-liquid extraction device, comprising a housing (1) and a plurality of extraction components disposed inside the housing (1), characterized in that: The shell (1) is provided with a dispersed phase inlet (2) and a continuous phase inlet (3) at the bottom and top of one side, respectively, and a first outlet (4) and a second outlet (5) at the bottom and top of one side, respectively. The extraction assembly includes a high-speed sieve tray (6), a liquid receiving tray (7), and a downcomer (8). The liquid receiving tray (7) is located at both ends of the high-speed sieve tray (6), and the downcomer (8) is located on one side of the high-speed sieve tray (6). The high-speed sieve tray (6) is provided with pre-separation packing.
2. The high-speed liquid-liquid extraction device according to claim 1, characterized in that: The pre-separation packing includes a hydrophobic unit (9) and a hydrophilic unit (10). The hydrophobic unit (9) is located above the high-speed sieve tray (6), and the hydrophilic unit (10) is located below the high-speed sieve tray (6).
3. The high-speed liquid-liquid extraction device according to claim 1, characterized in that: The top of the interior of the shell (1) is provided with a perforated tray (11), and a support ring (12) is connected between the bottom of the perforated tray (11) and the shell (1).
4. The high-speed liquid-liquid extraction device according to claim 1, characterized in that: The shell (1) is composed of multiple sets of tubes, and adjacent sets of tubes are fixed together by flanges (13) and bolts.
5. The high-speed liquid-liquid extraction device according to claim 1, characterized in that: The housing (1) located below the second discharge port (5) is provided with a boundary gauge interface (14), and the boundary gauge interface (14) is used to connect the boundary gauge.
6. The high-speed liquid-liquid extraction device according to claim 1, characterized in that: A sampling port (15) is provided on the housing (1) below the continuous phase feed inlet (3), and a valve is provided on the sampling port (15).
7. The high-speed liquid-liquid extraction device according to claim 6, characterized in that: A pressure measuring port is connected to the housing (1) at the position between the dispersed phase inlet (2) and the sampling port (15), and a pressure gauge (16) is connected to the pressure measuring port.