An extraction column

Abstract

The embodiment of the present application provides an extraction column, and relates to the technical field of chemical metallurgy. The extraction column comprises a column body, a pulse system and a sieve plate assembly. The column body is internally provided with a mixing area for accommodating a light phase and a heavy phase. The pulse system is used for intermittently outputting a gas pulse to provide an upward thrust for the light phase and the heavy phase. The sieve plate assembly is located in the mixing area and comprises a plurality of spaced sieve plates, and a plurality of sieve plate holes are formed in the sieve plates. The extraction column realizes the purpose of shearing and breaking the dispersed phase by the periodic gas pulse and the up and down jet flow caused by the pulse in a very short time, the obtained dispersed phase is more uniform, a higher mass transfer coefficient can be realized, and the emulsification problem is effectively alleviated.

Description

Technical Field

[0001] This invention relates to the field of chemical and metallurgical technology, and more specifically, to an extraction tower. Background Technology

[0002] The explosive growth of the new energy power battery industry has placed higher demands on the capacity and efficiency of nickel-cobalt separation processes in production lines. Improving the unit volume processing efficiency of extraction equipment, reducing the amount of extractant pressed into the tank, and reducing the equipment footprint are key to improving the quality and efficiency of extraction production lines, and are of great significance to enhancing the cost competitiveness of upstream raw material industries in the new energy sector.

[0003] The inventors discovered that existing extraction towers obtain droplets by shearing and breaking the liquid through a stirring system. The discrete phase obtained by this equipment is not uniform enough and cannot meet the requirements for the size of the discrete phase droplets. As a result, it cannot achieve a higher mass transfer coefficient and will cause the droplets to be broken into too small sizes and emulsify, which will put pressure on the subsequent oil removal and TOC removal processes. Summary of the Invention

[0004] The objectives of this invention include, for example, providing an extraction tower that yields a more uniform discrete phase with a larger average size, enabling a higher mass transfer coefficient, effectively alleviating emulsification problems, and reducing the pressure on subsequent oil and TOC removal processes.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] This invention provides an extraction tower, comprising:

[0007] The tower body includes a mixing zone for containing light and heavy phases.

[0008] A pulse system for intermittently outputting gas pulses to provide an upward thrust to the light phase and the heavy phase;

[0009] A sieve plate assembly, located in the mixing zone and comprising a plurality of spaced sieve plates, wherein the sieve plates are provided with a plurality of sieve plate holes.

[0010] In an optional embodiment, the aperture of the upper sieve plate between any two adjacent sieve plates is greater than or equal to the aperture of the lower sieve plate, and the opening ratio of the upper sieve plate between any two adjacent sieve plates is greater than or equal to the opening ratio of the lower sieve plate.

[0011] In an optional embodiment, the opening ratio or aperture of the uppermost sieve plate is greater than that of the lowermost sieve plate.

[0012] In an optional embodiment, the difference between the opening ratio of the uppermost sieve plate and the opening ratio of the lowermost sieve plate ranges from 12% to 22%, and the difference between the aperture of the uppermost sieve plate and the aperture of the lowermost sieve plate ranges from 1 to 4 mm.

[0013] In an optional embodiment, the pulse system includes a pulse nozzle, the pulse nozzle is provided with an air outlet surface, and the air outlet surface is provided with a first opening area and a second opening area, wherein the opening ratio of the first opening area is greater than or equal to the opening ratio of the second opening area.

[0014] In an optional embodiment, the aperture of the first opening area and the aperture of the second opening area are in the range of 3-10 mm, and the aperture of the first opening area is greater than or equal to the aperture of the second opening area.

[0015] In an optional embodiment, the bottom of the tower body is further provided with a heavy phase outlet, the bottom of the tower body is provided with a light phase inlet and a heavy phase outlet, the top of the tower body is further provided with a heavy phase inlet and a light phase outlet, and both the light phase inlet and the heavy phase inlet are provided with liquid distributors. The liquid distributors are used to evenly distribute the light phase and the heavy phase and input them into the interior of the tower body to form the light phase and the heavy phase. The heavy phase outlet is used to discharge the extracted heavy phase, and the light phase outlet is used to discharge the extracted light phase. The heavy phase outlet is lower than the light phase inlet, and the light phase outlet is higher than the heavy phase inlet.

[0016] In an optional embodiment, a heavy phase clarification and strengthening plate is provided at the bottom of the tower body. The heavy phase clarification and strengthening plate is located between the light phase inlet and the heavy phase outlet. The heavy phase clarification and strengthening plate has a corrugated upper surface to reduce the amount of light phase entrained in the heavy phase discharged from the heavy phase outlet.

[0017] In an optional embodiment, the top of the tower body is provided with a light phase suppression and entrainment plate, which is located between the heavy phase inlet and the light phase outlet. The light phase suppression and entrainment plate is provided with a corrugated lower surface to reduce the amount of heavy phase entrained in the light phase discharged from the light phase outlet.

[0018] In an optional embodiment, a color identifier and a density detector are provided at the heavy phase outlet to detect the color and concentration of the liquid discharged from the heavy phase outlet.

[0019] The beneficial effects of the embodiments of the present invention include, for example:

[0020] The present invention provides an extraction column comprising a column body, a pulse system, and a sieve plate assembly. The column body includes a mixing zone for containing a light phase and a heavy phase. The pulse system intermittently outputs gas pulses to provide an upward thrust to the light and heavy phases. The sieve plate assembly is located in the mixing zone and includes multiple spaced sieve plates. Multiple sieve plate holes are formed on the sieve plates. When the pulse system outputs gas pulses, the light and heavy phases, under the thrust of the gas pulses, pass through the multiple sieve plates to form an upward jet stream; when the pulse system stops outputting gas pulses, the light and heavy phases, under their own gravity, pass through the multiple sieve plates to form a downward jet stream.

[0021] This extraction tower utilizes periodic gas pulses in conjunction with a sieve plate. The upward and downward jets generated by the pulses within a very short time achieve the purpose of shearing and breaking down the discrete phase. The discrete phase obtained by this extraction tower is more uniform, with a larger average size, enabling a higher mass transfer coefficient, effectively alleviating emulsification problems, and reducing the pressure on subsequent oil removal and TOC removal processes. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the extraction tower provided in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the sieve plate assembly provided in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the sieve plate provided in an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the tie rod and the spacer tube provided in an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of a pulse nozzle provided in an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the opening structure of the air outlet surface provided in an embodiment of the present invention.

[0029] Icons: 100-Extraction column; 10-Column body; 11-Light phase inlet; 111-Light phase feed pipe; 112-Light phase feed pump; 12-Heavy phase inlet; 13-Light phase outlet; 14-Heavy phase outlet; 15-Liquid distributor; 16-Heavy phase clarification enhancement plate; 17-Light phase entrainment suppression plate; 20-Pulse system; 21-Compressed air inlet pipe; 22-Buffer tank; 23-Gas pulse leg; 231-Interface meter; 25-Pulse nozzle; 251-Gas outlet surface; 2511-First opening zone; 2512-Second opening zone; 30-Sieve plate assembly; 31-Sieve plate; 311-Sieve plate hole; 32-Tie rod; 33-Spacing tube; 34-Support rib; 40-Upper clarification zone; 50-Mixing zone; 60-Lower clarification zone. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0034] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0035] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0036] Please refer to Figure 1 and Figure 2 This embodiment provides an extraction tower 100, which includes a tower body 10, a pulse system 20, and a sieve plate assembly 30.

[0037] The column body 10 is provided with an upper clarification zone 40, a mixing zone 50, and a lower clarification zone 60 from top to bottom. The mixing zone 50 is used to contain the light phase and the heavy phase and to carry out extraction. The upper clarification zone 40 is used to separate the light phase from the extracted light and heavy phases. The lower clarification zone 60 is used to separate the heavy phase from the extracted light and heavy phases. The bottom of the column body 10 is provided with a light phase inlet 11 and a heavy phase outlet 14, and the top of the column body 10 is provided with a heavy phase inlet 12 and a light phase outlet 13. Liquid distributors 15 are respectively provided at the light phase inlet 11 and the heavy phase inlet 12 to uniformly distribute the light phase and the heavy phase and introduce them into the mixing zone 50.

[0038] The pulse system 20 includes a pulse nozzle 25. The pulse nozzle 25 is located near and above the lower clarification zone 60, and is used to intermittently output gas pulses to provide upward thrust to the light and heavy phases. It should be noted that in this embodiment, the pulse nozzle 25 is located below the liquid distributor 15 at the light phase inlet 11.

[0039] The sieve plate assembly 30 is located inside the tower body 10 and includes multiple horizontally arranged and spaced-apart sieve plates 31, each with multiple sieve plate holes 311. When the pulse system 20 outputs a gas pulse, the light and heavy phases form an upward jet stream through the multiple sieve plates 31 under the thrust of the gas pulse; when the pulse system 20 stops outputting gas pulses, the light and heavy phases form a downward jet stream through the multiple sieve plates 31 under their own gravity.

[0040] It should be noted that in this embodiment of the invention, the heavy phase is the solution to be extracted. The heavy phase is pumped to the top of the column by a submersible pump (not shown) and then from the heavy phase inlet 12 through the liquid distributor 15 to the mixing zone 50 inside the column. The light phase in this embodiment of the invention is the extractant. The light phase is pumped into the bottom of the column from the light phase inlet 11 by the light phase feed pump 112. The power source provided by the pulse system 20 provides an upward thrust to the light and heavy phases during the upstroke cycle, forming an upward jet flow after passing through the sieve plate holes 311, which is beneficial for the complete breaking up of the discrete phase and uniform dispersion between adjacent sieve plates 31. During the downstroke cycle, as the pulse pressure gradually disappears, the light and heavy phases form a downward jet flow after passing through the sieve plates 31. This periodic up and down jet action is beneficial for increasing the turbulence between adjacent sieve plates 31 and increasing the mass transfer coefficient. However, it is necessary to carefully control the pulse intensity and coordinate it with the tray spacing and the feed rate of the two phases. To avoid excessive upward or downward distances during the upper and lower strokes of the injection, which could cause excessive backmixing, weaken the mass transfer driving force, and reduce the efficiency of the extraction tower 100.

[0041] Please refer to Figure 2 , Figure 3 and Figure 4 The sieve plate assembly 30 also includes tie rods 32 and spacer tubes 33. The bottommost sieve plate 31 is fixed to the bottom of the tower body 10. The tie rods 32 pass through multiple sieve plates 31 and are secured to the entire sieve plate assembly 30 with nuts at both ends. There are several spacer tubes 33, which are sleeved on the tie rods 32. The spacer tubes 33 are located between two adjacent sieve plates 31 and their ends abut against the sieve plates 31.

[0042] Optionally, the bottommost sieve plate 31 is provided with supporting ribs 34. The supporting ribs 34 are staggered in the plane of the sieve plate 31 and fixedly connected to the inner wall of the tower body 10. Specifically, the supporting ribs 34 can be welded to the bottom wall and the peripheral wall of the tower body 10.

[0043] It is understood that the sieve plate assembly 30 provided in this embodiment of the invention has the ability to flexibly adjust the spacing between sieve plates 31, suppress inter-stage backmixing, and cope with fluctuations in operating conditions. When it is necessary to adjust the spacing between sieve plates 31, only the spacer tube 33 and the pull rod 32 need to be replaced to adjust the spacing between sieve plates 31. Specifically, the adjustment range of the spacing between adjacent sieve plates 31 in this embodiment of the invention is 40-240 mm. This distance is determined by the mass transfer coefficient of the light phase heavy phase extraction process and the feed flow rate of the production line. In other embodiments, the adjustment range of the spacing between adjacent sieve plates 31 can be set as needed.

[0044] To enhance the load-bearing capacity and stability of the sieve plate assembly 30, the thickness of the bottom sieve plate 31 is greater than that of the other sieve plates 31. Specifically, in this embodiment, the thickness of each sieve plate 31 is 3-5mm, and the thickness of the bottom sieve plate 31 is 10-20mm, supporting the weight of the upper sieve plates 31.

[0045] To avoid the problem of smaller droplets and higher emulsification risk at higher levels in the extraction tower 100, the pore size of the upper sieve plate 31 between any two adjacent sieve plates 31 is greater than or equal to the pore size of the lower sieve plate 31, and the porosity of the upper sieve plate 31 between any two adjacent sieve plates 31 is greater than or equal to the porosity of the lower sieve plate 31.

[0046] Optionally, the opening ratio or aperture of the uppermost sieve plate 31 is greater than that of the lowermost sieve plate 31.

[0047] Specifically, in this embodiment, the pore size of the sieve plate 31 is 1-4 mm, and the porosity is 12%-22%. That is, the difference in pore size between the uppermost and lowermost sieve plates 31 ranges from 1-4 mm, and the difference in porosity between the uppermost and lowermost sieve plates 31 ranges from 12%-22%. The increased pore size increases the droplet surface area, making extraction easier. The increased porosity reduces the droplet volume, preventing emulsification.

[0048] Optionally, within the n sieve plates 31 arranged in a cycle from the bottom to the top of the tower, (n-1) sieve plates 31 are made of ordinary 316L stainless steel or ordinary ceramic material, and the nth sieve plate is made of modified polytetrafluoroethylene.

[0049] Please refer to Figure 5 and Figure 6 The pulse nozzle 25 is provided with an exhaust surface 251. The exhaust surface 251 has a first opening area 2511 and a second opening area 2512. The opening ratio of the first opening area 2511 is greater than or equal to the opening ratio of the second opening area 2512. Specifically, the difference between the opening ratio of the first opening area 2511 and the opening ratio of the second opening area 2512 ranges from 0-15%. The aperture of the first opening area 2511 and the aperture of the second opening area 2512 ranges from 3-10 mm. It is understood that when a pulse enters, it can cause power segregation and uneven power source distribution. The different opening ratios and aperture sizes of the first opening area 2511 and the second opening area 2512 suppress strong pulses and enhance weak pulses, effectively avoiding the problem of uneven pulse power distribution.

[0050] Specifically, in this embodiment, the cross-section of the pulse nozzle 25 is circular. The outlet surface 251 is a dome-shaped arc surface. The areas of the first opening region 2511 and the second opening region 2512 each occupy half of the area of ​​the outlet surface 251, which is used to solve the problem of uneven concentration distribution in the tower that is prone to occur in large-diameter industrial pulse extraction tower 100 and to suppress the scale-up effect. In other embodiments, the cross-section of the pulse nozzle 25 can also be of other shapes, and the area ratio of the first opening region 2511 and the second opening region 2512 can also be set differently. A first opening region 2511, a second opening region 2512 and a third opening region can also be set. As long as the effect of the embodiment of the present invention can be achieved, the present invention is not limited.

[0051] Please refer to Figure 1To facilitate downstream production, the amount of light phase entrainment during the extraction process must be strictly controlled. The bottom of the column 10 is equipped with a heavy phase outlet 14, and the top of the column 10 is equipped with a light phase outlet 13. The heavy phase outlet 14 is used to discharge the extracted heavy phase, and the light phase outlet 13 is used to discharge the extracted light phase. The heavy phase outlet 14 is lower than the light phase inlet 11, and the light phase outlet 13 is higher than the heavy phase inlet 12. The bottom of the column 10 is equipped with a heavy phase clarification and enhancement plate 16. The heavy phase clarification and enhancement plate 16 is located between the light phase inlet 11 and the heavy phase outlet 14, and is used to reduce the amount of light phase entrainment in the heavy phase discharged from the heavy phase outlet 14. The top of the column 10 is equipped with a light phase inhibition entrainment plate 17. The light phase inhibition entrainment plate 17 is located between the heavy phase inlet 12 and the light phase outlet 13, and is used to reduce the amount of heavy phase entrainment in the light phase discharged from the light phase outlet 13. The heavy phase clarification and strengthening plate 16 has a corrugated upper surface, and the light phase suppression and entrainment plate 17 has a corrugated lower surface, which is used to allow the organic phase to remain in the plate and prolong the clarification time.

[0052] It should be noted that, in this embodiment of the invention, the heavy phase clarification and strengthening plate 16 is specifically positioned above the heavy phase outlet 14 and below the light phase inlet 11. The material of the heavy phase clarification and strengthening plate 16 has oleophilic and hydrophobic properties, thus promoting the separation and flotation of oil droplets, reducing the light phase entrainment rate in the heavy phase, thereby reducing the activated carbon consumption cost in the downstream oil removal section and maximizing the recovery and utilization of the extractant. Similarly, in this embodiment of the invention, the light phase inhibition and entrainment plate 17 is specifically positioned above the heavy phase inlet 12 and below the light phase outlet 13. The material of the light phase inhibition and entrainment plate 17 has hydrophilic and oleophobic properties, which can reduce the heavy phase entrainment in the light phase.

[0053] In other words, the bottom of this extraction tower 100 is configured from low to high as follows: heavy phase outlet 14, heavy phase clarification and enhancement plate 16, pulse nozzle 25, and light phase inlet 11. The top of this extraction tower 100 is configured from low to high as follows: heavy phase inlet 12, light phase suppression and entrainment plate 17, and light phase outlet 13.

[0054] Please refer to Figure 1 The pulse system 20 includes a compressed air inlet pipe 21, a buffer tank 22, and a gas pulse leg 23 connected in sequence. The buffer tank 22 is used to monitor and regulate the pressure. An interface gauge 231 is installed on the gas pulse leg 23 to monitor the high and low liquid levels to ensure stable operation of the pulse system 20. It should be noted that in this embodiment, a gas pipe is provided between the gas pulse leg 23 and the pulse nozzle 25, and the gas pipe and the light phase feed pipe 111 are independent of each other.

[0055] Optionally, a color recognizer (not shown) and a density detector (not shown) are provided at the heavy phase outlet 14 to detect the color and concentration of the liquid discharged from the heavy phase outlet 14. Specifically, the color recognizer can identify the color of the RGB pixels and generate a color signal, outputting the color recognition signal to the DCS central control to automatically increase or decrease the flow rate of the light phase extractant.

[0056] The working principle and process of an extraction tower 100 provided in this embodiment of the invention are as follows:

[0057] When extraction is required, the heavy phase is conveyed through the heavy phase inlet 12 and liquid distributor 15 to the mixing zone 50 within the column, while the light phase is conveyed through the light phase feed pump 112 from the light phase inlet 11 and liquid distributor 15 to the bottom of the column. The power source provided by the pulse system 20 exerts an upward thrust on both the light and heavy phases during the upstroke cycle, forming an upward jet flow after passing through the sieve plate holes 311. This facilitates thorough breakup and uniform dispersion of the discrete phase between adjacent sieve plates 31. During the downstroke cycle, as the pulse pressure gradually disappears, the light and heavy phases, under the influence of gravity, pass through multiple sieve plates 31, forming a downward jet flow. The heavy and light phases flow counter-currently in the extraction column 100, ensuring maximum mass transfer driving force for efficient mass transfer.

[0058] After sufficient mass transfer is completed between the light and heavy phases within the column, driven by the density difference and pulsed power, the extracted light phase passes through the light phase suppression plate 17 at the top of the column and is discharged from the light phase outlet 13, while the heavy phase passes through the heavy phase clarification and enhancement plate 16 at the bottom of the column and is discharged from the heavy phase outlet 14. The heavy phase clarification and enhancement plate 16, through its specific structure and material properties, leverages the difference in affinity for oil and water droplets to promote the separation and flotation of oil droplets, reducing the light phase entrainment rate. This reduces the activated carbon consumption cost in the downstream oil removal section and maximizes the recovery and utilization of the extractant. Similarly, the light phase suppression plate 17 reduces the heavy phase entrainment in the light phase through its configuration and material.

[0059] The beneficial effects of the extraction tower 100 provided in this embodiment of the invention are:

[0060] The extraction tower 100 provided by this invention achieves the purpose of shearing and breaking down the discrete phase through periodic gas pulses in conjunction with a sieve plate 31. The pulses generate upper and lower jets within a very short time. The discrete phase obtained by this extraction tower 100 is more uniform and has a larger average size, which can achieve a higher mass transfer coefficient, effectively alleviate emulsification problems, and reduce the pressure on subsequent oil removal and TOC removal processes.

[0061] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An extraction tower, characterized in that, include: The tower body includes a mixing zone for containing light and heavy phases. A pulse system for intermittently outputting gas pulses to provide an upward thrust to the light phase and the heavy phase; A sieve plate assembly, located in the mixing zone and comprising a plurality of spaced sieve plates, wherein the sieve plates are provided with a plurality of sieve plate holes; The aperture of the upper sieve plate between any two adjacent sieve plates is larger than the aperture of the lower sieve plate, and the opening ratio of the upper sieve plate between any two adjacent sieve plates is larger than the opening ratio of the lower sieve plate. The pulse system includes a pulse nozzle, which has an air outlet surface. The air outlet surface has a first opening area and a second opening area, and the opening ratio of the first opening area is greater than or equal to the opening ratio of the second opening area.

2. The extraction tower according to claim 1, characterized in that, The opening ratio or aperture of the uppermost sieve plate is greater than that of the lowermost sieve plate.

3. The extraction tower according to claim 2, characterized in that, The difference between the opening ratio of the uppermost sieve plate and the opening ratio of the lowermost sieve plate is in the range of 12%-22%, and the difference between the aperture of the uppermost sieve plate and the aperture of the lowermost sieve plate is in the range of 1-4mm.

4. The extraction tower according to claim 1, characterized in that, The aperture diameter of the first opening area and the aperture diameter of the second opening area are in the range of 3-10 mm, and the aperture diameter of the first opening area is greater than or equal to the aperture diameter of the second opening area.

5. The extraction tower according to claim 1, characterized in that, The bottom of the tower body is provided with a light phase inlet and a heavy phase outlet, and the top of the tower body is also provided with a heavy phase inlet and a light phase outlet. Both the light phase inlet and the heavy phase inlet are provided with liquid distributors. The liquid distributors are used to evenly distribute the light phase and the heavy phase and input them into the mixing zone. The heavy phase outlet is used to discharge the extracted heavy phase, and the light phase outlet is used to discharge the extracted light phase. The heavy phase outlet is lower than the light phase inlet, and the light phase outlet is higher than the heavy phase inlet.

6. The extraction tower according to claim 5, characterized in that, The bottom of the tower body is provided with a heavy phase clarification and strengthening plate, which is located between the light phase inlet and the heavy phase outlet. The heavy phase clarification and strengthening plate has a corrugated upper surface, which is used to reduce the amount of light phase entrained in the heavy phase discharged from the heavy phase outlet.

7. The extraction tower according to claim 5, characterized in that, The top of the tower body is provided with a light phase suppression and entrainment plate, which is located between the heavy phase inlet and the light phase outlet. The light phase suppression and entrainment plate has a corrugated lower surface, which is used to reduce the amount of heavy phase entrained in the light phase discharged from the light phase outlet.

8. The extraction tower according to claim 5, characterized in that, The heavy phase outlet is equipped with a color identifier and a density detector to detect the color and concentration of the liquid discharged from the heavy phase outlet.

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