High-efficiency separation clarifying tank

Abstract

The clarification tank comprises a tank body and is provided with a partition plate dividing the interior into a first area and a second area, the first area is connected with at least one feeding port, the second area is connected with at least one discharging port, and the first area is communicated with the second area; and the at least one splitter plate is arranged at the communication part of the first area and the second area. The liquid-liquid separation efficiency is remarkably improved through an original two-stage flow velocity retarding structure. The first area adopts a narrow flow channel design, so that the initial flow velocity of extract liquor is increased to form a forced flow state. When fluid enters a flow dividing area formed by the three flow dividing plates, the circulation sectional area is suddenly enlarged, and the first flow velocity is suddenly reduced. The unique 90-degree bent diversion arc structure of the splitter plate generates a centrifugal effect, so that the liquid flow direction is deflected by 90 degrees, fluid is uniformly dispersed, and kinetic energy is consumed through wall surface friction.

Description

Technical Field

[0001] This application relates to wet metallurgy extraction tanks or mixer-settlers, and particularly to a clarifying tank with high-efficiency separation. Background Art

[0002] Extraction is a technique for separation by utilizing the solubility differences of different components in a solvent, and is widely applied in fields such as rare metals, rare earth elements, chemical engineering, and pharmaceuticals. Its core principle is that through the mixing and contact of an extractant (organic phase) with a feed solution (aqueous phase / heavier phase), the target solute is selectively transferred from the feed solution to the extractant, thereby achieving separation and enrichment.

[0003] Currently, industrial applications generally use multi-stage countercurrent extraction tanks for continuous extraction and separation. Its typical structure includes: Mixing chamber: The organic phase and the aqueous phase are fully mixed by a stirring paddle to promote mass transfer reactions.

[0004] Clarifying chamber: The mixed phase naturally separates under the action of gravity to achieve two-phase separation. Underfeed / flow-by design at the bottom chamber: The organic phase and the heavier phase flow to adjacent extraction tanks by relying on the pressure difference or gravity, forming a countercurrent extraction process.

[0005] Although this process has been widely applied, the following key problems still exist in the clarifying stage: 1. The fluid disturbance in the clarifying area is severe, and the position design of the liquid inlet and the stationary area (clarifying area) is unreasonable, resulting in the newly entered mixed liquid flow impacting the stratified interface, causing secondary mixing (backmixing phenomenon). The disturbance will reduce the separation efficiency and increase the entrainment loss of the organic phase.

[0006] 2. The clarifying rate is low, the residence time is long, relying on natural gravity sedimentation, and the separation speed is limited by the density difference and viscosity of the two phases; Therefore, there is an urgent need for a new clarifying technology or equipment optimization solution to solve the above problems. Summary of the Invention

[0007] The purpose of this application is to provide a clarifying tank with high-efficiency separation to solve the problem of severe fluid disturbance in the clarifying area and improve the clarifying rate.

[0008] A clarifying tank with high-efficiency separation provided by this application adopts the following technical solution: It includes a box body, a partition board that divides the interior into a first area and a second area. The first area is connected to at least one feed port, the second area is connected to at least one discharge port, and the first area and the second area are communicated; at least one flow splitter is arranged at the communication part between the first area and the second area.

[0009] By adopting the above technical solution, the partition divides the box body into a first area and a second area, forming a clear fluid treatment path; the first area is connected to the feed port to receive the mixed liquid, and the second area is connected to the discharge port to discharge the separated phase liquid; the communication design between the two areas ensures the orderly flow of the fluid and avoids the short-circuit phenomenon at the same time; the flow dividing plate arranged at the communication part forms a controllable fluid channel, and the flow dividing plate can effectively reduce the kinetic energy of the mixed liquid when it enters the clarification area and reduce the impact of the fluid on the stratified interface. Compared with the traditional clarification tank, this solution significantly improves the separation efficiency and operation stability while maintaining a simple structure, and has important industrial application value.

[0010] Optionally, the space between two adjacent flow dividing plates and between the separation flow plate and the inner wall of the box body is a flow dividing area, and the flow dividing areas are respectively communicated with the first area and the second area, and the regional space of the flow dividing area gradually increases from the inlet end to the outlet end.

[0011] By adopting the above technical solution, the gradually expanding flow channel design (the space of the flow dividing area gradually increases from the inlet end to the outlet end) makes the flow velocity of the mixed liquid naturally decrease as the flow cross-sectional area increases, avoiding the direct impact of high-speed fluid on the clarification interface; the fluid forms a stable laminar flow state in the expanding flow channel, effectively suppressing the backmixing phenomenon; the conventional straight-through flow channel is prone to the "jet effect", while the gradually expanding structure can reduce the fluid outlet velocity to less than 0.1 m / s (the traditional tank is usually > 0.3 m / s); Optionally, the flow dividing plate is provided with at least two guiding arcs, which are respectively close to the inlet position and the outlet position of the flow dividing area, and the flow dividing plate is provided with balance holes communicating the two sides of the flow dividing area.

[0012] By adopting the above technical solution, the guiding arc design at the inlet is beneficial to eliminating the acute angle eddy current when the water flow enters, forming the Coanda effect to guide the fluid to flow along the wall, avoiding the central jet flow and reducing the interface disturbance. The guiding arc design at the outlet prevents the secondary eddy current caused by the boundary layer separation and reduces the turbulence. The double guiding arcs form a notch, effectively extending the kinetic energy absorption and reducing the water flow velocity at the outlet of the flow dividing area; the balance holes allow the fluid exchange between adjacent flow dividing areas. When the flow velocity of a certain flow dividing area is relatively high, the local pressure decreases, and the fluid in the adjacent flow dividing area will be supplemented through the balance holes, so as to balance the pressure difference on both sides and finally make the flow velocities tend to be consistent; the balance holes promote the momentum transfer between fluid micro-masses and weaken the flow velocity difference.

[0013] Optionally, the discharge port and the flow dividing area are respectively located at both ends of the box body, and a static area is arranged between the discharge port and the flow dividing area.

[0014] By adopting the above technical solution, through physically isolating the "mixed fluid treatment area" (shunt area) from the "pure phase collection area" (discharge port), the fluid disturbance transmission path is completely cut off, enabling the fluid to be completely free from the influence of the previous flow history. Each component is only dominated by its own physical properties (such as density, interfacial tension, etc.). When there are temporary fluctuations in the shunt area, the long-distance static area forms a natural buffer zone to prevent abnormal working conditions from directly affecting the product collection quality.

[0015] Optionally, a number of protrusions are provided at the outlet position of the shunt area. The protrusions are provided on the shunt plates on both sides, and the middle of the protrusions is high and the surrounding is low.

[0016] By adopting the above technical solution, a special-shaped protrusion structure is innovatively arranged at the outlet position of the shunt area. Through a delicate fluid guiding mechanism, this design realizes a better improvement in the phase separation efficiency; the protrusions have a "squeezing - releasing" effect on the light-phase droplets, promoting the coalescence of the light phase; the protrusions have a "sliding - filtering" effect on the heavy-phase components, promoting the prevention of entrainment of the heavy phase.

[0017] Optionally, an inclined filter screen is provided in the first area. The filter screen includes a first screen and a second screen. The first screen is made of an oil-repellent and hydrophilic material, and the second screen is made of a hydrophobic and lipophilic material. The first screen is close to the feed port.

[0018] By adopting the above technical solution, in the inclined composite filter screen system arranged in the first area, the first screen is made of an oil-repellent and hydrophilic material, which enables the aqueous phase to easily pass through the first screen, while the oil phase is intercepted by the first screen. The intercepted oil-phase droplets will accumulate to form large droplets. When the oil-phase droplets accumulate to a certain extent, they will finally break away from the first screen due to buoyancy; the second screen is made of a hydrophobic and lipophilic material, and the oil phase easily passes through the second screen, and the aqueous phase is hindered when passing through the second screen. In this way, through the cooperation of the first screen and the second screen, the extracted liquid can be quickly and preliminarily separated.

[0019] Optionally, the first screen and the second screen are both provided with mating connection parts, and a liquid flow channel is formed between the first screen and the second screen.

[0020] By adopting the above technical solution, when the aqueous phase passes through the second screen, part of the aqueous phase will still pass through the second screen, and part of the aqueous phase will flow downward along the inclined direction of the second screen. Generally, the density of the aqueous phase is greater than that of the oil phase. After the mixture of the two stands still, the aqueous phase is located below; the second screen can guide most of the aqueous phase to the lower part, accelerating the sedimentation of the aqueous phase.

[0021] Optionally, the first screen and the second screen are arranged in a staggered manner, and the end of the first screen abuts against the bottom surface of the first area.

[0022] By adopting the above technical solution, the first net and the second net are misaligned, openings are formed at the ends of the first net and the second net, and the opening at the bottom end is used for the outflow of the aqueous phase.

[0023] Optionally, the box body is provided with a power mechanism for driving the filter net to move. The power mechanism includes a frame for installing the first net and the second net, an execution component for driving the frame to move reciprocally, and a power source connected to the power input end of the execution component.

[0024] By adopting the above technical solution, the movement of the net surface applies a shear force to the interfacial fluid, promotes the coalescence of dispersed phase droplets, and accelerates the phase separation process; the periodic perturbation destroys the static boundary layer on the surface of the filter net, improves the mass transfer efficiency, and enables the surface characteristics of hydrophilic / hydrophobic materials to be more fully exerted.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The liquid-liquid separation efficiency is significantly improved through the original two-stage flow velocity reduction structure. The first zone adopts a narrow flow channel design, which increases the initial flow velocity of the extraction liquid to form a forced flow state. When the fluid enters the diversion zone constructed by three diversion plates, the flow cross-sectional area suddenly expands, realizing the first sudden drop in flow velocity. The unique 90° bent diversion arc structure of the diversion plate generates a centrifugal effect, causing the liquid flow direction to deflect by 90°, not only evenly dispersing the fluid, but also consuming kinetic energy through wall friction. When the fluid enters the static zone, the cross-sectional area expands for the second time, further reducing the flow velocity and forming an almost static separation environment. Compared with the traditional single-stage flow velocity reduction tank, this stepped flow velocity reduction design shortens the stratification time, and the physical barrier formed by the diversion plate can weaken more than 90% of the flow disturbance, improving the stability of the already stratified interface; 2. The synergistic effect of the gradually expanding flow channel structure and the balance system. The diversion zone adopts an expansion angle design, which makes the flow cross-sectional area increase, and forms a stable laminar flow through continuous flow velocity reduction. The setting of the balance holes creatively solves the problem of uneven flow velocity in multiple channels: the balance holes form a pressure compensation network between adjacent diversion zones. When the flow velocity of a certain channel changes, a transverse compensation flow will be generated in the holes, ensuring that the flow velocity difference at each outlet is controlled within ±5%. The flat protrusions form an alternating distribution of high-speed zones and low-speed zones, and the pressure difference generated based on the Bernoulli effect drives the tiny oil droplets to migrate directionally to the high-speed zones, improving the coalescence efficiency.

[0026] 3. An inclined composite filter net system is arranged in the first zone. The first net is made of an oil-repellent and hydrophilic material, which enables the aqueous phase to easily pass through the first net, while the oil phase is intercepted by the first net. The intercepted oil phase droplets will accumulate to form large droplets. When the oil phase droplets accumulate to a certain extent, they will finally break away from the first net due to buoyancy; the second net is made of a water-repellent and oil-loving material, and the oil phase easily passes through the second net, while the aqueous phase is hindered when passing through the second net. In this way, through the cooperation of the first net and the second net, the extracted liquid can be quickly and preliminarily separated. Brief Description of the Drawings

[0027] Figure 1 is a schematic diagram of the overall structure of Embodiment 1 of the present application; Figure 2 is a top view of the overall structure of Embodiment 1 of the present application; Figure 3 is a schematic diagram of the overall structure of Embodiment 2 of the present application; Figure 4 is the present application Figure 3 of the top view; Figure 5 is the present application Figure 4 of the partial enlarged view; Figure 6 is a schematic diagram of the overall structure of Embodiment 3 of the present application; Figure 7 is a partial enlarged view of Embodiment 3 of the present application; Figure 8 is a schematic diagram of the structure of the third baffle of Embodiment 3 of the present application; Figure 9 is the present application Figure 6 of the sectional view taken along line A-A; Figure 10 is the present application Figure 6 of the sectional view taken along line B-B; Figure 11 is the present application Figure 10 of the partial enlarged view at position a.

[0028] Description of the Reference Numerals: 1, box body; 11, first area; 12, second area; 121, static area; 2, feed inlet; 3, discharge outlet; 31, first shell; 32, first connecting portion; 33, second shell; 34, second connecting portion; 4, shunt plate; 41, shunt area; 42, diversion arc; 43, balance hole; 44, protrusion; 45, high-speed area; 46, low-speed area; 5, first mesh; 51, first connecting column; 52, groove; 53, second connecting column; 54, column head; 6, second mesh; 7, power mechanism; 71, frame; 72, execution component; 73, power source; 8, liquid channel; 9, baffle; 91, first baffle; 911, second feed groove; 912, second flow groove; 913, second discharge groove; 92, second baffle; 921, first feed groove; 922, first outflow groove; 923, first discharge groove; 93, third baffle; 931, first part; 9311, first buffer groove; 932, arc part; 933, third part; 9331, second buffer groove. Detailed Description of the Embodiments

[0029] The following will further describe the present application in detail with reference to the attached Figure 1 - attached Figure 11 drawings.

[0030] An embodiment of the present application discloses a clarifying tank for efficient separation.

[0031] Example 1, referring to Figure 1 and Figure 2 , a clarifying tank for efficient separation, including a box body 1. In Example 1, the box body 1 is a rectangular shell with an open top. A partition is fixedly connected inside the box body 1. One end and one side of the partition are connected to the inner wall of the box body 1. The partition divides the interior of the box body 1 into a first zone 11 and a second zone 12. The ratio of the distances from the partition to both sides is 1:6, and the width of the first zone 11 is relatively narrow; there is a feed port 2 at the end of the first zone 11, and there are three discharge ports 3 in the second zone 12. Two of the discharge ports 3 are used for the output of the aqueous phase, and the other discharge port 3 is used for the output of the oil phase. The installation position of the discharge port 3 for the output of the oil phase is higher than that of the discharge port 3 for the output of the aqueous phase; Among them, the first zone 11 and the second zone 12 are connected. The box body 1 is fixedly connected with a flow dividing plate 4. The flow dividing plate 4 is arranged at the connection of the first zone 11 and the second zone 12. In Example 1, the number of the flow dividing plates 4 is 3. Each flow dividing plate 4 has two diversion arcs 42. The two sides of the flow dividing plate 4 are bent 90° in the same direction, and the diversion arcs 42 are arranged at the bending places; between adjacent two flow dividing plates 4 and between the flow dividing plate and the inner wall of the box body 1 form a flow dividing zone 41, and the area between the discharge port 3 and the flow dividing zone 41 is a static zone 121; First of all, the extraction liquid enters into multiple flow dividing zones 41 from the narrow flow dividing zone 41, and the overall flow area of the extraction liquid becomes larger. In this way, when entering the flow dividing zone 41, the flow rate of the extraction liquid can be effectively slowed down. With the sudden slowdown of the speed, the turbulence intensity weakens, and the liquid droplets are more likely to collide and coalesce, accelerating the stratification; similarly, when the flow dividing zone 41 enters the static zone 121, the flow rate of the extraction liquid is further slowed down; the two-stage speed reduction zone established in the present application can effectively reduce the flow rate of the extraction liquid, which is beneficial to the stratification of the extraction liquid.

[0032] Secondly, the flow dividing zone 41 can also effectively reduce the disturbance of the extraction liquid flowing in the first zone 11 to the extraction liquid in the static zone 121 and the stratified extraction liquid. The flow dividing plate 4 can effectively relieve the impact of the water flow and can change the flow direction of the extraction liquid, so that the extraction liquid can flow out of the static zone 121 evenly and with a similar flow rate on one side of the static zone 121, which can greatly reduce the disturbance to the stratified extraction liquid in the static zone 121.

[0033] Reference Figure 1 and Figure 2, the discharge port 3 for aqueous phase output in Embodiment 1 includes a first shell 31 and a first connecting portion 32 that communicates with the inside of the first shell 31. The first shell 31 has at least one opening that communicates with the inside, and the opening is close to the bottom wall of the box body 1. The connecting portion of the first connecting portion 32 and the first shell 31 is located on the side wall of the first shell 31. In this way, when the aqueous phase flows out, the turbulence generated by the flow of the aqueous phase can be restricted within the first shell 31, effectively preventing the influence on the static area 121 when the aqueous phase flows out.

[0034] The discharge port 3 for oil phase output in Embodiment 1 includes a second shell 33 and a second connecting portion 34 that communicates with the inside of the second shell 33. The top of the first shell 31 is an opening. When the oil phase separates and rises above the top of the second shell 33, the oil phase will be collected by the second shell 33 and output through the second connecting portion 34.

[0035] The implementation principle of a clarification tank with efficient separation is as follows: The extraction liquid enters the narrow first zone 11 from the feed port 2 at the end of the first zone 11. Since the cross-sectional area of the first zone 11 is small, the extraction liquid flows in at a relatively high speed, and then enters the diversion zone 41 through the communication part between the partition plate and the box body 1. At this time, the flow cross-sectional area suddenly expands, the flow rate decreases significantly for the first time, and the turbulence intensity weakens; In the diversion zone 41 formed between adjacent diversion plates 4 and with the inner wall of the box body 1, the extraction liquid encounters the 90° bending diversion arcs 42 on both sides of the diversion plate 4, and the flow direction is forced to change. This design evenly disperses the liquid flow and further reduces the flow rate at the same time; The extraction liquid flows from the first zone 11 → the diversion zone 41, the diversion zone 41 → the static zone 121, and the step-by-step flow rate decrease is realized through two expansions of the cross-sectional area, promoting the collision and coalescence of liquid droplets; The fluid flow rate in the static zone 121 is relatively stable.

[0036] In the static zone 121 of the second zone 12, the low-speed flowing extraction liquid naturally stratifies due to the density difference, with the oil phase floating and the aqueous phase sinking. The diversion effect of the diversion plate 4 enables the liquid flow to evenly enter the static zone 121, avoiding the impact of local high-speed flow on the stratified interface. The first shells 31 of the two low-position discharge ports 3 limit the turbulence generated by the flow of the aqueous phase within the shell, preventing the disturbance of the static zone 121; The second shell 33 of the high-position discharge port 3 collects the surface oil phase through the top opening and overflows naturally using the liquid level difference, avoiding the disturbance of pump suction.

[0037] Embodiment 2, refer to Figure 3 and Figure 4, different from Embodiment 1: A baffle 9 is provided in the second zone 12. In Embodiment 2, the number of baffles 9 is 2. For the convenience of description, the two baffles are respectively named the first baffle 91 and the second baffle 92. The first baffle 91 and the second baffle 92 are close to the flow splitting zone 41, and through slots are provided on both the first baffle 91 and the second baffle 92; due to the different lengths of the flow splitting plates, the liquid flow areas of the formed flow splitting zones 41 are different, resulting in different liquid flow velocities in each flow splitting zone 41. When the extraction liquid is guided through the flow splitting zone 41, it will first pass through the second baffle 92 and the first baffle 91 for buffering and blocking, so that the flow velocities of the extraction liquid flowing out of each flow splitting zone 41 are regularized, so that the flow velocities of the extraction liquid entering the static zone 121 from each flow splitting zone 41 are basically the same, effectively preventing the extraction liquid flowing out of the flow splitting zone 41 from disturbing the extraction liquid in the static zone 121.

[0038] Reference Figure 5 , the through slots on the second baffle 92 include a first feed slot 921, a first discharge slot 923, and a first flow slot 922. The first flow slot 922 is corrugated. The first feed slot 921 and the first discharge slot 923 are alternately arranged on both sides of the first flow slot 922 in sequence. Both the first feed slot 921 and the first discharge slot are communicated with the bent portions on the first outflow slot 922. The extraction liquid is first split on one side of the first flow slot 922 and then converges on one side of the first flow slot 922; in this way, the mixing of the aqueous phase and the oil phase in the extraction liquid is enhanced. The extraction effect is enhanced.

[0039] The through slots on the first baffle 91 include a second feed slot 911, a second discharge slot 913, and a second flow slot 912. The second feed slot 911 and the second discharge slot 913 are alternately arranged on both sides of the first baffle 91 in sequence. The second feed slot 911 is communicated with two adjacent second discharge slots 913 through the second flow slot 912; the water flow at the second discharge slot 913 will intersect to enhance the mass transfer effect; A buffer zone for the flow of the extraction liquid is formed between the first baffle 91 and the second baffle 92, which can greatly reduce the flow velocity of the extraction liquid and prevent disturbing the extraction liquid in the static zone 121.

[0040] The through slots in Embodiment 2 are arranged longitudinally.

[0041] Embodiment 3, reference Figure 6 and Figure 7 , different from Embodiment 2, the regional space of the flow splitting zone 41 gradually increases from the inlet end to the outlet end, so that the flow velocity of the mixed liquid naturally decreases as the flow cross-sectional area increases, avoiding the direct impact of high-speed fluid on the clarification interface of the static zone 121; the gradually expanding flow channel design enables the extraction liquid to form a stable laminar flow state when flowing in the flow splitting zone 41, effectively suppressing the backmixing phenomenon.

[0042] Reference Figure 6 andFigure 7 On the flow splitter plate 4, there are balance holes 43 connecting adjacent flow splitting areas 41 on both sides. The balance holes 43 allow fluid exchange between adjacent flow splitting areas 41. When the flow rate in a certain flow splitting area 41 is relatively high, the local pressure decreases, and the fluid in the adjacent flow splitting area 41 will supplement through the balance holes 43, thereby balancing the pressure difference on both sides and finally making the flow rates tend to be consistent; the balance holes 43 promote the momentum transfer between fluid micro - masses and weaken the flow rate difference; the output ends of the flow splitting areas 41 are basically located on the same plane. Without the design of the balance holes 43, due to the different lengths and widths of each flow splitting area 41, the flow rates of the internal extraction liquid in the flow splitting areas 41 are different, and the flow rates of the extraction liquid output from each flow splitting area 41 to the static area 121 are different, resulting in disturbing the static area 121, which is not conducive to the separation of the extraction liquid.

[0043] Reference Figure 8 and Figure 9 and, at the position near the bottom end of the outlet of the flow splitting area 41, there are several protrusions 44. The protrusions 44 are arranged on the flow splitter plates 4 on both sides and the inner wall of the box body 1. The protrusions 44 are high in the middle and low around, and the protrusions 44 are flat. This results in the output end of the flow splitting area 41. Under the action of the protrusions 44 like this. The flow channel is the narrowest at the highest point of the protrusions 44, and the flow rate of the extraction liquid is relatively fast, forming a local high - speed area 45. The horizontal area between two adjacent protrusions 44 is a low - speed area 46; Since the fluid in the high - speed area 45 has a relatively fast flow rate, according to Bernoulli's principle, the high - speed area 45 is a low - pressure area, and the low - speed area 46 is a high - pressure area relative to the high - speed area 45. Due to the existence of a pressure gradient, the oil - phase droplets in the low - speed area 46 will move and gather towards the high - speed area 45. In this way, the accumulated large oil - phase droplets are more likely to float and stratify in the static area 121.

[0044] Reference Figure 8 and, in the second area 12, there is a baffle 9. In Embodiment 3, the number of baffles 9 is 1, and for the convenience of distinction, it is named the third baffle 93. The third baffle 93 includes a first part 931, a radian part 932, and a second part 933. The radian part 932 is respectively connected to the first part 931 and the second part 933. The second part 933 is located at the bottom end. The distance between the first part 931 and the flow splitting area 41 is greater than the distance between the second part 933 and the flow splitting area 41; the first part 931 is provided with several longitudinal first buffer grooves 9311, and the second part 9331 is provided with several transverse second buffer grooves 9331.

[0045] The extraction liquid has formed a relatively distinct layer separation after passing through the first zone 11 and the flow splitting zone 41. The oil phase is located above and the water phase is located below. The separated oil phase will flow to the first part 931, and after the speed is reduced through the first buffer tank 9311, it will flow to the static zone 121; when the unseparated oil phase passes through the protrusion 44, it will move and gather in the direction of the high-speed zone 45; the second baffle 93 can effectively relieve the liquid flow rate, and the flow rate at the lower end is greater than that at the upper end. In the upper enlarged area, the flow rate decreases, and the oil droplets have more time to gather and float to the surface; in the lower narrow area, the water phase quickly concentrates, reducing the possibility of entraining oil droplets.

[0046] Reference Figure 10 and Figure 11 In the first zone 11, an inclined filter screen is provided. The filter screen includes a first mesh 5 and a second mesh 6. The first mesh 5 is made of an oil-repellent and water-attracting material, and the second mesh 6 is made of a water-repellent and oil-attracting material. The first mesh 5 is close to the feed port 2; in Example 2, the first mesh 5 is specifically made of hydrophilic modified polypropylene, and the second mesh 6 is specifically made of polytetrafluoroethylene. The water phase is more likely to pass through the first mesh 5, and the oil phase is more likely to pass through the second mesh 6. However, the first mesh 5 cannot completely prevent the passage of the oil phase, and the second mesh 6 cannot completely prevent the passage of the water phase.

[0047] Setting the filter screen in the first zone 11 first serves as a speed-reducing screen. Since the width of the first zone 11 is relatively narrow, the entry speed of the extraction liquid is relatively turbulent, which is not conducive to the layer separation of the extraction liquid. By setting up the filter screen, the flow rate of the extraction liquid can be effectively reduced. Secondly, it is made of two completely opposite materials, and the first mesh 5 and the second mesh 6 constitute a composite filter screen system; the water phase of the first mesh 5 can easily pass through while the oil phase is intercepted by the first mesh 5, and the intercepted oil phase droplets will accumulate to form large droplets. When the oil phase droplets accumulate to a certain extent, they will finally break away from the first mesh 5 due to buoyancy; the oil phase of the second mesh 6 easily passes through, and the water phase is hindered when passing through. By setting different degrees of difficulty for different fluids to pass through, it is beneficial to the accumulation of the same kind of droplets in the extraction liquid, thereby realizing the preliminary separation of the water phase and the oil phase quickly.

[0048] Reference Figure 11 On the first mesh 5, a number of first connecting columns 51 are provided. At the end of the first connecting column 51, a groove 52 is provided. On the second mesh 6, a second connecting column 53 is provided. The second connecting column 53 is provided with a column head 54 that is mated with the groove 52. The column head 54 can be clamped in the groove 52. The first mesh 5 and the second mesh 6 are installed through the mating of the first connecting column 51 and the second connecting column 53. The first connecting column 51 and the second connecting column 53 support and separate the first mesh 5 and the second mesh 6, so that a liquid flow channel is formed between the first mesh 5 and the second mesh 6. Since both the first mesh 5 and the second mesh 6 are inclined, the liquid flow channel is also inclined. The first mesh 5 and the second mesh 6 are misaligned, and openings are formed at the ends of the first mesh 5 and the second mesh 6. The opening at the bottom end is used for the outflow of the water phase.

[0049] The aqueous phase is more likely to pass through the first mesh 5 and enter the liquid channel 8. The resistance of the aqueous phase passing through the second mesh 6 increases, and part of the aqueous phase will flow along the liquid channel 8 and flow out through the lower opening, thus greatly shortening the sedimentation time of the aqueous phase. The resistance of the oil phase passing through the first mesh 5 is large, and the oil-phase droplets intercepted by the first mesh 5 will accumulate to form large droplets. When the oil-phase droplets accumulate to a certain extent, they will finally break away from the first mesh 5 due to buoyancy and enter the liquid channel 8. The oil phase is more likely to pass through the second mesh 6, and the oil-phase body passing through the second mesh 6 is relatively large and is more likely to float upward, accelerating the stratification efficiency.

[0050] Reference Figure 10 , the box body 1 is provided with a power mechanism 7 for driving the movement of the filter mesh. The power mechanism 7 includes a frame 71 for installing the first mesh 5 and the second mesh 6, an execution component 72 for driving the frame 71 to move reciprocally, and a power source 73 connected to the power input end of the execution component 72. In Embodiment 2, the power source 73 is taken as an example of a motor, and the execution component 72 is taken as an example of a screw rod component. The power input end of the execution component 72 is connected to the power source 73, and the moving output end of the execution component 72 is connected to the frame 71, so as to realize the reciprocating movement of the first mesh 5 and the second mesh 6. The movement of the mesh surface applies a shear force to the interfacial fluid, promotes the coalescence of the dispersed-phase droplets, and accelerates the phase stratification process; the periodic disturbance destroys the static boundary layer on the surface of the filter mesh, enhances the mass transfer efficiency, and enables the surface characteristics of the hydrophilic / hydrophobic material to be more fully exerted.

[0051] It should be noted that the influence of the water flow fluctuation generated by the reciprocating movement of the mesh surface in the first area 11 can be effectively eliminated through the diversion area 41, preventing the influence of the water flow fluctuation on the static area 121.

[0052] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An efficient separation clarifying tank, characterized in that: including a box body (1) provided with a partition plate that divides the interior into a first area (11) and a second area (12). The first area (11) is connected to at least one feed inlet (2), and the second area (12) is connected to at least one discharge outlet (3). The first area (11) and the second area (12) are in communication; at least one flow splitting plate (4) disposed at the communication position between the first area (11) and the second area (12).

2. The clarification tank for efficient separation according to claim 1, wherein: The areas between adjacent two of the flow splitting plates (4) and between the flow splitting plate and the inner wall of the box body (1) are flow splitting areas (41). The flow splitting areas (41) are respectively in communication with the first area (11) and the second area (12), and the regional space of the flow splitting areas (41) gradually increases from the inlet end to the outlet end.

3. The clarifying tank for efficient separation according to claim 2, characterized in that: The width change rate of the flow splitting area (41) is linearly variable.

4. The clarification tank for efficient separation according to claim 3, characterized in that: The flow splitting plate (4) is provided with at least two guiding arcs (42) respectively near the inlet position and the outlet position of the flow splitting area (41). The flow splitting plate (4) is provided with balance holes (43) that communicate the flow splitting areas (41) on both sides.

5. The clarifying tank for efficient separation according to claim 2, wherein: The discharge outlet (3) and the flow splitting area (41) are respectively at two ends of the box body (1), and a static area (121) is provided between the discharge outlet (3) and the flow splitting area (41).

6. The clarifying tank for efficient separation according to claim 1, characterized in that: A plurality of protrusions (44) are provided at the outlet position of the flow splitting area (41). The protrusions (44) are provided on the flow splitting plates (4) on both sides, and the middle of the protrusions (44) is high and the periphery is low.

7. The clarifying tank for efficient separation according to claim 1, characterized in that: The first area (11) is provided with an inclined filter screen, and the filter screen includes a first mesh (5) and a second mesh (6). The first mesh (5) is made of an oil-repellent and hydrophilic material, and the second mesh (6) is made of a hydrophobic and oilophilic material. The first mesh (5) is close to the feed inlet (2).

8. The clarification tank for efficient separation according to claim 7, characterized in that: Both the first mesh (5) and the second mesh (6) are provided with mating connection parts, and a liquid flow channel is formed between the first mesh (5) and the second mesh (6).

9. The clarifying tank for efficient separation according to claim 8, wherein: The first mesh (5) and the second mesh (6) are arranged in a staggered manner, and the end of the first mesh (5) abuts against the bottom surface of the first area (11).

10. The clarifying tank for efficient separation according to claim 9, characterized in that: The box body (1) is provided with a power mechanism (7) for driving the movement of the filter screen. The power mechanism (7) includes a frame (71) for installing the first mesh (5) and the second mesh (6), an execution component (72) for driving the frame (71) to move reciprocally, and a power source (73) connected to the power input end of the execution component (72).

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