Rare earth extraction equipment with microencapsulation auxiliary structure

Abstract

The invention relates to the technical field of rare earth extraction devices, and discloses rare earth extraction equipment with a microencapsulation auxiliary structure, the rare earth extraction equipment comprises an extraction tower, the extraction tower is sequentially provided with a tower cover, an upper filler part, a middle filler part, a lower filler part and a heavy phase collector from top to bottom, the internal structures of the upper filler part, the middle filler part and the lower filler part are the same, and the heavy phase collector is arranged in the tower cover. Separators are arranged in the middles of the three, a filler area for increasing the contact area of two-phase liquid and prolonging the contact time of the two-phase liquid is arranged below the separators, a perforated plate for bearing the filler area is arranged below the filler area, and an auxiliary area for improving extraction selectivity and efficiency is arranged above the separators. According to the separator disclosed by the invention, the microcapsules and the filler are separately arranged, meanwhile, the microcapsules can continuously move in a fluid in a suspension manner, and the contact between the microcapsules and the liquid phase is dynamic and continuously changed, so that the microcapsules can be in contact with new rare earth ions to be extracted and an extracting agent in time, and a mass transfer interface is continuously updated, so that the mass transfer process is more efficient.

Description

Technical Field

[0001] The invention relates to the technical field of rare earth extraction devices, and in particular to rare earth extraction equipment equipped with a microencapsulation auxiliary structure. Background Art

[0002] The principle of rare earth extraction equipment is mainly based on the liquid-liquid extraction principle. It uses the difference in the distribution coefficients of rare earth elements in two immiscible solvents to achieve the separation and enrichment of rare earth elements. The extraction technology uses the difference in the distribution coefficients of different rare earth elements in specific extractants and different phases to achieve efficient separation of a variety of rare earth elements. Through a suitable extraction system, their purity can be improved to a very high level to meet the needs of different fields for high-purity rare earths.

[0003] In traditional rare earth extraction, the extractant is directly added to the system, and its concentration distribution is affected by the mixing effect and the diffusion process. As the extraction proceeds, the extractant is gradually diluted in the continuous phase, and the extraction driving force decreases, resulting in a decrease in the extraction rate. At the same time, the extractant is easily lost at the phase interface or reacts with impurities, which reduces the effective concentration and affects the extraction efficiency. In addition, the selectivity of traditional extractants for rare earth elements is often limited. In complex rare earth ore leachates, multiple rare earth ions and impurity ions coexist, and it is difficult for the extractant to accurately extract only the target rare earth ions. The co-extraction of non-target ions will reduce the purity of the target product. In order to obtain high-purity products, multiple extraction and back-extraction operations are often required, which increases processing time and cost and reduces the overall extraction efficiency. Summary of the invention

[0004] Technical issues solved In view of the above-mentioned shortcomings of the prior art, the present invention provides a rare earth extraction device equipped with a microencapsulation auxiliary structure, which can effectively solve the problems of high processing time and cost and easy loss of extractant in the traditional extraction system of the prior art.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a rare earth extraction device equipped with a microencapsulation auxiliary structure, comprising: An extraction tower, wherein the extraction tower is sequentially provided with a tower cover, an upper packing part, a middle packing part, a lower packing part and a heavy phase collector from top to bottom, wherein the upper packing part, the middle packing part and the lower packing part have the same internal structure, a separator is provided at the middle of the inner wall of the upper packing part, the middle packing part and the lower packing part, a packing area for increasing the contact area and contact time of the two-phase liquid is provided below the separator, a porous plate for supporting the packing area is provided below the separator, and an auxiliary area for improving the extraction selectivity and efficiency is provided above the separator; A stirring section, which is located in the middle of the extraction tower and includes a stirring member for driving the filler in the auxiliary zone to move to avoid blockage and adjusting the distribution state of the filler zone; Wherein, the extraction tower also includes an isolating member for guiding the filler area to make it evenly distributed.

[0006] Furthermore, the stirring part also includes a motor that passes through the middle of the tower cover, the output end of the motor is fixedly connected to the main shaft, and the outer wall of the main shaft is evenly provided with multiple stirring elements, which are arranged in three and are respectively located in the filling area of ​​the upper filling part, the middle filling part and the lower filling part.

[0007] Furthermore, the stirring element includes a stirring paddle arranged in the filling area and in contact with the filling material, the fan blade side of the stirring paddle is designed symmetrically and tilted, and the space in the filling area that is not in contact with the filling material is provided with a stirring blade, and the blades of the stirring blade are all designed to be tilted around the outer surface of the main shaft.

[0008] Furthermore, a heavy phase inlet is arranged at the top of the tower cover around the motor, and a light phase outlet is arranged at the lower end of the outer surface of the tower cover. Both the heavy phase inlet and the light phase outlet adopt a multi-point design, and the heavy phase inlet and the light phase outlet are staggered.

[0009] Furthermore, a liquid guide is provided on the inner wall of the tower cover, the middle part of which is fixed on the outer surface of the main shaft, the bottom end of which is fixedly connected to a liquid collecting trough, the bottom end of which is arranged in an upwardly inclined arc, and the edge of which is flush with the light phase outlet.

[0010] Furthermore, a guide plate is arranged below the liquid guide member, the guide plate is fixed above the upper filler portion, a guide groove is arranged at the edge of the guide plate for facilitating the entry of heavy phase liquid, and a sieve hole is arranged at the center of the guide plate for facilitating the output of light liquid.

[0011] Furthermore, the isolation member includes a partition fixed inside the extraction tower, a vortex channel is fixedly connected to the top of the partition, a recovery port is provided at one end of the vortex channel close to the edge of the partition, a valve port is provided at the other end of the vortex channel, a pipeline is fixedly connected to the bottom end of the valve port, and the pipeline is fixedly connected to a discharge member arranged on the outside of the extraction tower.

[0012] Furthermore, a limited flow channel is arranged on the inner wall of the vortex channel, and the inner contour of the limited flow channel adopts a bracket-shaped design, the opening is rounded and the edges on both sides of the groove body are slightly curved inward, a guide plate is fixedly connected to the top of the vortex channel, and through holes with larger bottom and smaller top are evenly arranged on the bottom end of the inner wall of the vortex channel. Through holes with larger bottom and smaller top are evenly arranged on the bottom end of the inner wall of the vortex channel, and the guide plate adopts an upward trumpet-shaped design.

[0013] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The present invention is provided with a stirring element, and the turning or rotation of the lower layer of filler can continuously renew the contact between the filler surface and the fluid, thereby improving the mass transfer efficiency. The upper layer of microcapsules is in full contact with the fluid in a suspended state, and the vortex channel design enables the microcapsules to form a complex flow pattern with the fluid during the falling process, thereby further enhancing the mass transfer effect and helping to improve the extraction efficiency and separation effect.

[0014] The present invention is provided with a separator to separate the microcapsule and the filler. The contact between the microcapsule and the liquid-liquid two phases is dynamic and continuously changing, and the new rare earth ions to be extracted and the extractant can be contacted in time, and the mass transfer interface is continuously updated, so that the mass transfer process is more efficient. The microcapsule has a convenient discharge design, so that the microcapsule can be easily replaced or supplemented during equipment maintenance, and it is also more convenient to check and clean the lower filler. This design reduces the difficulty and cost of equipment maintenance and improves the operating stability and service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 Schematic diagram of the cross section of an extraction tower according to an embodiment of the present invention; Figure 3 It is a schematic diagram of the structure of the middle filler part of an embodiment of the present invention; Figure 4 A schematic diagram of the structure of the isolator according to an embodiment of the present invention; Figure 5 is a schematic diagram of a cross-sectional structure of an isolation member according to an embodiment of the present invention; Figure 6 A schematic diagram of the structure of a stirring member according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of a liquid guide member according to an embodiment of the present invention; Figure 8 Schematic diagram of the guide plate structure according to an embodiment of the present invention.

[0017] The numbers in the figure represent respectively: 1. extraction tower; 11. tower cover; 12. upper packing part; 13. middle packing part; 14. lower packing part; 15. heavy phase collector; 16. isolation part; 161. partition; 162. vortex channel; 163. through hole; 164. valve port; 165. pipeline; 166. discharge part; 167. guide plate; 168. flow limiting channel; 17. packing area; 18. auxiliary area; 19. porous plate; 2. stirring part; 21. motor; 22. main shaft; 23. stirring part; 231. stirring blade; 232. stirring paddle; 3. heavy phase inlet; 4. light phase outlet; 5. liquid guiding part; 51. liquid collecting tank; 6. guide plate; 61. guide trough; 62. sieve hole; 7. recovery port. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The present invention will be further described below in conjunction with the embodiments.

[0020] Example:

[0021] See also Figure 1-Figure 8 The present invention provides a rare earth extraction equipment technical solution equipped with a microencapsulation auxiliary structure: Figure 1 and Figure 2 The device comprises an extraction tower 1, which is sequentially provided with a tower cover 11, an upper packing part 12, a middle packing part 13, a lower packing part 14 and a heavy phase collector 15 from top to bottom. The bottom of the extraction tower 1 is provided with a heavy phase collector 15, and grooves are provided at the upper and lower positions of the outer surface of the heavy phase collector 15. The aqueous phase with rare earth ions enters the extraction tower 1 from the heavy phase inlet 3, and the organic phase enters from the groove of the heavy phase collector 15. The feeding position of the two phases is designed as a countercurrent mode, that is, the heavy phase enters from the top of the tower and flows from top to bottom under the action of gravity, and the light phase enters from the heavy phase collector 1 5, flows from bottom to top under pressure, and after full contact and mass transfer in the packing area 17, the two phases flow out at the light phase outlet 4 and the bottom of the tower respectively. At the tower cover 11, the light phase, i.e., the organic phase loaded with rare earth ions, flows out through the light phase outlet 4 due to its low density to become the extraction phase; at the heavy phase collector 15, the heavy phase, i.e., the water phase with reduced solute concentration, flows out through the groove of the heavy phase collector 15 due to its high density to become the raffinate phase. The two phases flowing out from the top and the bottom of the tower enter the subsequent separation equipment to further realize the separation of the two phases, and obtain relatively pure extraction phase and raffinate phase.

[0022] However, in the prior art, when there is only filler, although the filler can increase the contact area between the liquid and liquid phases, the mass transfer area it provides is still relatively insufficient, and the diffusion rate of the solute between the two phases is relatively slow, and it takes a longer time to reach the extraction equilibrium, and the overall extraction efficiency is low. At the same time, in the traditional filler extraction process, the extractant is easily adsorbed and entrained at the phase interface, resulting in part of the extractant flowing out with the raffinate phase or the extraction phase, causing the loss of the extractant. In addition, the extractant reacts chemically with impurities or other components in the system, which also consumes the extractant and increases the production cost. Therefore, the upper filler part 12, the middle filler part 13 and the lower filler part 14 arranged in the present invention have the same internal structure, and the middle part of the inner wall of the upper filler part 12, the middle filler part 13 and the lower filler part 14 is provided with an isolation member 16, and a filler area 17 for increasing the contact area and contact time of the two-phase liquid is arranged below the isolation member 16, and a porous plate 19 for supporting it is arranged below the filler area 17, and a device for improving the extraction selectivity is arranged above the isolation member 16. The auxiliary zone 18 for improving the extraction efficiency is set as a double layer, the lower filler zone 17 is a conventional filler, and the upper auxiliary zone 18 is filled with microcapsules. The contact area between the rare earth ions and the extractant is increased by the microcapsules, so that the extraction process is more complete. The small size and large specific surface area of ​​the microcapsules can allow the rare earth ions to react with the extractant more quickly, accelerating the mass transfer rate, just like dividing a large object into many small particles, which can contact with the surrounding substances more fully, thereby improving the extraction efficiency. In addition, the microcapsules can selectively enrich the rare earth ions, wrap the target rare earth ions inside the microcapsules, and achieve more efficient separation and extraction. The microcapsules can strengthen the mass transfer process between the liquid-liquid phases. In the filler zone 17, the microcapsules can serve as a "bridge" for mass transfer to promote the transfer of rare earth ions between the aqueous phase and the organic phase. Due to the presence of the microcapsules, the mass transfer resistance between the two phases is reduced, and the mass transfer coefficient is increased, so that the rare earth ions can be transferred from one phase to another more smoothly, thereby improving the effect and efficiency of mass transfer. In traditional extraction, emulsification is prone to occur, which makes phase separation difficult and reduces the extraction effect. Microcapsules adjust the interfacial tension through their wall materials, making it easier to separate the liquid-liquid phases, inhibiting the occurrence of emulsification and avoiding the formation of stable emulsions. It is like adding a special substance to the mixture of water and oil, making it easier to separate water and oil. Microcapsules can adapt to a wider range of operating conditions due to the protection of their wall materials. Even if the operating conditions fluctuate, the microcapsules can still maintain good extraction performance, making the entire extraction process more stable and reliable, reducing the probability of poor extraction results or production accidents caused by changes in operating conditions, and reducing the sensitivity of the extraction process to operating conditions; The presence of microcapsules in the packing area 17 is conducive to the continuous operation of liquid-liquid rare earth extraction. They continue to play a role in the continuously flowing liquid-liquid two-phase, continuously extracting and separating rare earth ions, without the need for frequent intermittent operation, thereby improving production efficiency and automation, and meeting the needs of modern industrial large-scale production; Microcapsules can usually be recycled and reused, which reduces production costs. In addition, microcapsules have good reusability and can still maintain high extraction activity and selectivity after multiple cycles, thereby improving resource utilization. Overall, microcapsules improve extraction efficiency, reduce emulsification, reduce operating difficulty and equipment requirements, etc., making the production process more efficient and stable, thereby reducing production costs.

[0023] refer to Figure 2 The microcapsules in the present invention are placed in the upper packing part 12, the middle packing part 13 and the lower packing part 14 in sequence according to their different functions. The upper packing part 12 collects impurities, the middle packing part 13 achieves better catalysis, and the lower packing part 14 achieves better separation. Microcapsules with the function of adsorbing impurities are placed in the upper filling part 12 so that the raw materials first contact this layer. Impurities are removed as much as possible before entering the subsequent reaction and separation steps. The presence of impurities may affect the activity of the catalyst. The early adsorption of impurities can protect the catalytic microcapsules in the lower layer and improve the catalytic efficiency and stability.

[0024] After impurities are adsorbed, the relatively pure raw materials enter the middle filling part 13, and the catalytic microcapsules in the middle layer can fully contact and react with the treated raw materials. At the same time, the position of this layer is conducive to the coordination with the upper and lower layers, which not only receives the treated raw materials of the upper layer, but also provides reaction products for the separation of the lower layer, providing sufficient reaction sites for the reaction and promoting the reaction.

[0025] After the reaction products enter the lower packing part 14, the microcapsules that play a separation role realize efficient separation based on the difference in physical and chemical properties between the products and reactants and by-products, and place them in the lower layer to facilitate the collection of the final products and avoid the products from mixing with unreacted raw materials or impurities again during the upward flow.

[0026] refer to Figure 2 , Figure 3 and Figure 6, stirring part 2, the stirring part 2 is located in the middle of the extraction tower 1, the stirring part 2 includes a stirring member 23 for driving the filler in the auxiliary area 18 to move to avoid its blockage and adjust the distribution state of the filler area 17, the stirring part 2 also includes a motor 21 that runs through the middle of the tower cover 11, the output end of the motor 21 is fixedly connected to the main shaft 22, and the outer wall of the main shaft 22 is evenly provided with a plurality of stirring members 23, the stirring members 23 are provided in three and are respectively located in the filler area 17 of the upper filler part 12, the middle filler part 13 and the lower filler part 14, the stirring member 23 includes a stirring paddle 232 that is arranged in the filler area 17 and contacts with the filler material, the stirring The blade side of the paddle 232 is symmetrically inclined. The space in the filler area 17 that is not in contact with the filler material is provided with a stirring blade 231. The blades of the stirring blade 231 are all inclined around the outer surface of the main shaft 22. The rotation of the motor 21 drives the main shaft 22 to rotate. The rotation of the main shaft 22 drives the stirring blade 231 and the stirring paddle 232 to rotate. The stirring paddle 232 drives the filler in contact with it to roll along the inclined surface of the stirring paddle 232. The stirring blade 231 rotates to stir the liquid in the extraction tower 1, so that it generates an axial force. The generated force exerts an upward force on the microcapsules carried above it through the isolation member 16 to suspend it. Reference Figure 4 and Figure 5 A guide plate 167 is fixedly connected to the top of the vortex channel 162. The guide plate 167 adopts an upward trumpet-shaped design. The bottom end of the inner wall of the vortex channel 162 is evenly provided with through holes 163 that are larger at the bottom and smaller at the top. The axial force passing through the through holes 163 is further increased. The microcapsules under the influence of the axial force move upward smoothly along the trumpet-shaped opening of the guide plate 167. The design of the guide plate 167 will guide the microcapsules to smoothly enter the vortex channel 162 when the main shaft 22 reverses and changes the flow direction, ensuring that after the microcapsules approach the vortex channel 162 or fall on its upper surface, they will naturally move toward the center of the vortex channel 162 under the combined guidance of gravity and surface shape, and then enter the vortex channel 162.

[0027] The stirring element 23 is introduced into the extraction tower 1 to enhance the mixing degree of the two phases, so that the microcapsules suspended in the auxiliary zone 18 are continuously rolled and moved, and the contact frequency with the two phases is increased. At the same time, the setting of the stirring element 23 solves the problem of increased pressure drop in the extraction tower 1 and uneven fluid distribution caused by filler blockage, which affects the extraction effect, and reduces the maintenance cost of stopping for cleaning.

[0028] Compared with non-suspended microcapsules, the suspended microcapsules in the present invention can continuously move in the fluid, and the contact with the liquid-liquid two phases is dynamic and continuously changing. They can timely contact new rare earth ions to be extracted and extractants, and continuously update the mass transfer interface, making the mass transfer process more efficient. The position of non-suspended microcapsules is relatively fixed, and the dynamics of mass transfer and the update speed of the mass transfer interface are limited; In a flowing liquid-liquid system, suspended microcapsules can increase the relative velocity between the two phases with the help of the kinetic energy of the fluid, strengthen the driving force of mass transfer, and accelerate the diffusion rate of rare earth ions between the microcapsules and the two phases, thereby improving the overall mass transfer rate. The suspended microcapsules are evenly distributed with the fluid in the auxiliary zone 18, which can fully utilize the space of the entire auxiliary zone 18, and have more uniform and sufficient contact and mass transfer with the two-phase fluid, so that the extraction effect at different positions in the extraction tower 1 is more consistent. The non-suspended microcapsules may gather in some local areas, resulting in uneven extraction effect. When the fluid mechanics conditions such as the flow rate and flow velocity of the liquid-liquid two-phase change, the suspended microcapsules can better adapt to such changes and maintain good mass transfer performance by adjusting their own suspension state and movement trajectory. However, the non-suspended microcapsules may be washed away or accumulated due to the change of fluid conditions, which will affect the extraction effect. The suspended microcapsules are in a dynamic suspension state in the fluid and are not prone to local accumulation and blockage in the packing area 17. Even if there are a small amount of impurities or microcapsules are broken, they can be discharged or dispersed with the fluid, and will not cause local blockage like non-suspended microcapsules, affecting the normal operation of the extraction tower 1.

[0029] However, for microcapsules used to adsorb impurities or extract specific substances, the adsorption sites or extractants inside them will gradually become saturated as the use time increases, and the microcapsules need to be replaced to maintain efficient adsorption or extraction effects; for microcapsules encapsulating extractants, during the extraction process, the extractants may be lost due to volatilization, chemical reactions with other substances, or slow leakage from the tiny pores in the microcapsule wall. When the concentration of the extractant drops to a certain level and cannot meet the extraction requirements, the microcapsules need to be replaced to ensure the extraction efficiency and separation effect; for microcapsules encapsulating catalysts, during long-term use, impurities in the reaction system may react irreversibly with the catalyst, causing the active centers of the catalyst to be occupied and thus lose catalytic activity, and the microcapsules need to be replaced to ensure the continuous and efficient progress of the reaction; in addition, when rolling and moving in the packing layer, the microcapsules will constantly collide and rub with other microcapsules, causing the microcapsule wall to rupture. At the same time, the shear force of the fluid will also damage the microcapsules, especially when the flow rate is high or there is turbulence.

[0030] refer to Figure 4 and Figure 5The isolating member 16 comprises a partition 161 fixed inside the extraction tower 1, a vortex channel 162 is fixedly connected to the top of the partition 161, a recovery port 7 is arranged at one end of the vortex channel 162 near the edge of the partition 161, a valve port 164 is arranged at the other end of the vortex channel 162, a pipe 165 is fixedly connected to the bottom end of the valve port 164, and the pipe 165 is fixedly connected to a discharge member 166 arranged outside the extraction tower 1, a limited flow channel 168 is arranged on the inner wall of the vortex channel 162, and the inner contour of the limited flow channel 168 adopts a bracket-shaped design, the opening is rounded and the two sides of the groove body are The side edges are slightly curved inward, and the vortex channel 162 adopts a spiral design, which can enable the liquid and microcapsules to form a more stable and orderly spiral flow in the vortex channel 162, thereby enhancing the dispersion effect of the microcapsules. At the same time, during the subsequent discharge of the microcapsules, the microcapsules slide along the vortex channel 162, and the centrifugal force of the spiral motion can push the old microcapsules to the outlet more effectively. The flow limiting channel 168 is arranged in the vortex channel 162 to guide the flow direction of the microcapsules, so that the microcapsules can pass through the vortex channel 162 more smoothly, thereby preventing the microcapsules from accumulating in corners or dead areas.

[0031] The discharge part 166 stores new microcapsules, and the recycling port 7 collects and processes the discharged old microcapsules. The two are controlled by valves so that the two storage tanks work alternately. When one storage tank is delivering or receiving microcapsules, the other storage tank can be replenished or cleaned. This alternating working mode ensures the continuous supply and discharge of microcapsules, which helps to achieve a stable replacement process. The interior of the recycling port 7 is designed to have a certain buffer volume to avoid impact and splashing when the old microcapsules are discharged, and to facilitate subsequent transportation and recycling. A pump body is set on the side of the discharge part 166, which can transfer the new microcapsules to the valve port 164 through the pipeline 165. The opening of the valve port 164 is set to be slightly larger. Due to the spherical shape of the microcapsules, the new microcapsules are discharged into the vortex channel 162 through the valve port 164. Under the force applied by the discharge member 166, the microcapsules move smoothly along the flow limiting channel 168 to achieve the replacement of new and old capsules. Under the influence of the downward force applied by the stirring blade 231 to the microcapsules, the new microcapsules in the flow limiting channel 168 can pass smoothly and be evenly dispersed. The recovery port 7 can also be provided with an electromagnetic coil. For microcapsules with built-in magnetic materials, the combined action of the electromagnetic coil and the discharge member 166 can increase the replacement speed of the new and old microcapsules. refer to Figure 1 , Figure 2 , Figure 7 and Figure 8A heavy phase inlet 3 is arranged at the position around the motor 21 at the top of the tower cover 11, and a light phase outlet 4 is arranged at the lower end of the outer surface of the tower cover 11. Both the heavy phase inlet 3 and the light phase outlet 4 adopt a multi-point design, and the heavy phase inlet 3 and the light phase outlet 4 are staggered. A liquid guide 5 is arranged on the inner wall of the tower cover 11. The middle part of the liquid guide 5 is fixed to the outer surface of the main shaft 22, and a liquid collecting trough 51 is fixedly connected to the bottom end of the liquid guide 5. The bottom end of the liquid collecting trough 51 is arranged in an upwardly inclined arc, and the edge of the liquid collecting trough 51 is flush with the light phase outlet 4. A guide plate 6 is arranged below the liquid guide 5, and the guide plate 6 is fixed above the upper packing part 12. A guide groove 61 for facilitating the entry of heavy phase liquid is arranged at the edge of the guide plate 6, and a sieve hole 62 for facilitating the output of light liquid is arranged at the center of the guide plate 6.

[0032] After the light phase liquid rises through the sieve holes 62 of the guide plate 6, it enters the liquid guide member 5 above, and then is discharged from the light phase outlet 4 along the inner wall of the liquid guide member 5 and the edge of the liquid collecting tank 51. The guide plate 6 plays the role of rectifying and dispersing the light phase liquid, making the light phase liquid more uniform during the rising process, avoiding local flow rate being too fast or too slow, and the liquid guide member 5 can collect and store a certain amount of light phase liquid to ensure the stability of the discharge, which helps to improve the discharge quality and stability of the light phase liquid. The heavy phase liquid enters the tower cover 11 through the heavy phase inlet 3, then slides along the outer surface of the liquid guide member 5, and then moves from the guide groove 61 to the upper packing part 12. The outer surface of the liquid guide member 5 is provided with a guide groove according to the size of the guide groove 61, which ensures that the heavy phase liquid slides as required. At the same time, due to the staggered arrangement of the light phase outlet 4 and the heavy phase inlet 3, the risk of light phase back mixing is reduced; the multi-point design of the heavy phase inlet 3 and the light phase outlet 4 makes the liquid more evenly distributed in the extraction tower 1, avoiding excessive or insufficient local liquid, and the dispersion effect is better; The liquid guiding member 5 fitted with the tower cover 11 can better conform to the flow trend of the light phase liquid in the tower cover 11, allowing the liquid to converge more smoothly. Since the liquid will be affected by the flow field in the tower and the stirring effect of the liquid collecting tank 51 during the rising process, the arc design can reduce the sudden change of flow direction, reduce energy loss, and improve the liquid collection efficiency. At the same time, the liquid guiding member 5 increases the contact area with the light phase liquid, so that more liquid can be gathered in time.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rare earth extraction device equipped with a microencapsulation auxiliary structure, characterized in that: include: An extraction tower (1), wherein the extraction tower (1) is sequentially provided with a tower cover (11), an upper packing part (12), a middle packing part (13), a lower packing part (14) and a heavy phase collector (15) from top to bottom, wherein the upper packing part (12), the middle packing part (13) and the lower packing part (14) have the same internal structure, a separator (16) is provided in the middle of the inner wall of the upper packing part (12), the middle packing part (13) and the lower packing part (14), a packing area (17) for increasing the contact area and contact time of the two-phase liquid is provided below the separator (16), a porous plate (19) for supporting the packing area (17) is provided below the separator (16), and an auxiliary area (18) for improving the extraction selectivity and efficiency is provided above the separator (16); A stirring section (2), the stirring section (2) being located in the middle of the extraction tower (1), the stirring section (2) comprising a stirring element (23) for driving the filler in the auxiliary area (18) to move to avoid blockage and for adjusting the distribution state of the filler area (17); The extraction tower (1) further comprises a partition (16) for guiding the filler area (17) to ensure uniform distribution.

2. The rare earth extraction device equipped with a microencapsulation auxiliary structure according to claim 1, characterized in that: The stirring section (2) further comprises a motor (21) penetrating the middle of the tower cover (11); the output end of the motor (21) is fixedly connected to a main shaft (22); a plurality of stirring members (23) are evenly arranged on the outer wall of the main shaft (22); the stirring members (23) are arranged in three numbers and are respectively located in the packing areas (17) of the upper packing section (12), the middle packing section (13) and the lower packing section (14).

3. A rare earth extraction device equipped with a microencapsulation auxiliary structure according to claim 2, characterized in that: The stirring member (23) comprises a stirring paddle (232) arranged in the filling area (17) and in contact with the filling material, the blade side of the stirring paddle (232) adopts a symmetrically inclined design, and the space in the filling area (17) that is not in contact with the filling material is provided with a stirring blade (231), and the blades of the stirring blade (231) are all designed to be inclined around the outer surface of the main shaft (22).

4. The rare earth extraction device with a microencapsulation auxiliary structure according to claim 2, characterized in that: A heavy phase inlet (3) is arranged at the top of the tower cover (11) around the motor (21), and a light phase outlet (4) is arranged at the lower end of the outer surface of the tower cover (11). Both the heavy phase inlet (3) and the light phase outlet (4) adopt a multi-point design, and the heavy phase inlet (3) and the light phase outlet (4) are staggered.

5. The rare earth extraction device equipped with a microencapsulation auxiliary structure according to claim 4, characterized in that: The inner wall of the tower cover (11) is provided with a liquid guide member (5), the middle portion of the liquid guide member (5) is fixed to the outer surface of the main shaft (22), the bottom end of the liquid guide member (5) is fixedly connected to a liquid collecting trough (51), the bottom end of the liquid collecting trough (51) is arranged in an upwardly inclined arc shape, and the edge of the liquid collecting trough (51) is flush with the light phase outlet (4).

6. The rare earth extraction device with a microencapsulation auxiliary structure according to claim 5, characterized in that: A guide plate (6) is provided below the liquid guide member (5), the guide plate (6) being fixed above the upper filler portion (12), a guide groove (61) being provided at the edge of the guide plate (6) for facilitating the entry of heavy phase liquid, and a sieve hole (62) being provided at the center of the guide plate (6) for facilitating the output of light liquid.

7. The rare earth extraction device with a microencapsulation auxiliary structure according to claim 1, characterized in that: The isolation member (16) comprises a partition (161) fixed inside the extraction tower (1), the top of the partition (161) being fixedly connected to a vortex channel (162), one end of the vortex channel (162) close to the edge of the partition (161) being provided with a recovery port (7), the other end of the vortex channel (162) being provided with a valve port (164), the bottom end of the valve port (164) being fixedly connected to a pipeline (165), and the pipeline (165) being fixedly connected to a discharge member (166) arranged outside the extraction tower (1).

8. The rare earth extraction device with a microencapsulation auxiliary structure according to claim 7, characterized in that: A limited flow channel (168) is arranged on the inner wall of the vortex channel (162); the inner contour of the limited flow channel (168) is designed in a bracket shape, the opening is rounded and the edges of the groove body are slightly curved inward; the top of the vortex channel (162) is fixedly connected to a guide plate (167); the bottom end of the inner wall of the vortex channel (162) is evenly provided with through holes (163) that are larger at the bottom and smaller at the top; the bottom end of the inner wall of the vortex channel (162) is evenly provided with through holes (163) that are larger at the bottom and smaller at the top; and the guide plate (167) is designed in an upward trumpet shape.

Images