A solvent refining equipment for rubber plasticizer processing

Abstract

The application provides a rubber plasticizer processing solvent refining equipment, and relates to the technical field of rubber plasticizer processing.The solvent refining equipment comprises a refining extraction tank body and an internal countercurrent phase combination mechanism.An extraction agent inlet end and a raw material liquid inlet end are arranged on the side wall of the tank body, and an extraction phase and a raffinate phase discharge end are arranged on the top and the bottom respectively.The countercurrent phase combination mechanism is composed of a central shaft rotating structure and a multilayer sieve plate drainage structure.The sieve plate edges are in sliding fit with the inner wall of the tank body and form alternating downflow zones and horizontal flow zones.The central shaft rotating structure drives the rotation of the micro-diameter stirring rod to avoid sieve hole blockage, and drives the axial reciprocating movement of the sieve plate through a push-pull rod to promote the dispersion of the extraction agent jet.Raw material liquid and extraction agent are in multistage countercurrent contact in the horizontal flow zone to strengthen impurity removal.The application solves the problems of low efficiency and easy blockage of traditional equipment through dynamic mixing and multistage mass transfer design, and significantly improves the refining effect of rubber plasticizer and the product purity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rubber plasticizer processing, and particularly relates to a solvent refining device for rubber plasticizer processing. BACKGROUND

[0002] Rubber plasticizer is an additive for improving the processing performance of rubber and the flexibility of products, and mainly includes petroleum-based plasticizers such as aromatic oil and naphthenic oil, and synthetic plasticizers such as esters. In the production process of rubber plasticizer, the raw material oil usually contains a large amount of aromatic hydrocarbons and impurities, which need to be removed through a solvent refining process to improve the environmental protection and stability of the plasticizer.

[0003] Traditional solvent refining processes usually use extraction towers or mixed settling devices, which have problems such as low mass transfer efficiency, insufficient contact between solvent and raw material, and easy plugging of sieve plates, resulting in insufficient removal of aromatic hydrocarbons, large solvent consumption, and difficulty in adapting to efficient treatment of high-viscosity raw materials. In addition, the existing equipment has poor control over two-phase flow, which easily causes the light phase (extractant) to entrain the heavy phase (raw material liquid) or to be dispersed unevenly, affecting the refining effect. SUMMARY

[0004] The purpose of the present application is to provide a solvent refining device for rubber plasticizer processing to solve the technical problems raised in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] The application discloses a solvent refining device for rubber plasticizer processing, which comprises a refining extraction tank body and a countercurrent phase combination mechanism arranged in the refining extraction tank body, an extractant inlet end close to the bottom and a raw material liquid inlet end close to the top are arranged on the outer wall of the refining extraction tank body, an extraction phase discharge end is arranged at the top of the refining extraction tank body, and a raffinate phase discharge end is arranged at the bottom of the refining extraction tank body, the countercurrent phase combination mechanism comprises a middle shaft rotating structure and a plurality of sieve plate flow guide structures, the middle shaft rotating structure is rotationally arranged at the central position of the refining extraction tank body, the plurality of sieve plate flow guide structures are distributed in the refining extraction tank body in a stacked and equidistant manner, the middle shaft rotating structure penetrates through the centers of the sieve plate flow guide structures and rotationally cooperates with the sieve plate flow guide structures, the edges of the sieve plate flow guide structures are vertically slidably connected with the inner wall of the refining extraction tank body, one side of the sieve plate flow guide structure forms a downflow zone with the edge of the refining extraction tank body, the downflow zones formed by the adjacent two sieve plate flow guide structures and the edge of the refining extraction tank body are located on the two sides of the middle shaft rotating structure, respectively, a horizontal flow zone is formed between the adjacent two sieve plate flow guide structures, and the raw material liquid and the extractant are combined in the horizontal flow zone, a plurality of groups of micro-diameter stirring rods corresponding to the sieve plate flow guide structures are arranged on the middle shaft rotating structure, a push-pull rod is arranged on the inner top wall of the refining extraction tank body, the push-pull rod is connected with the middle shaft rotating structure and the sieve plate flow guide structure, and when the middle shaft rotating structure is in a forward-reverse alternating rotation state, the middle shaft rotating structure moves the plurality of sieve plate flow guide structures relative to the refining extraction tank body in an axial reciprocating mode through the push-pull rod.

[0007] Based on the above technical scheme, the application further provides the following optional technical schemes.

[0008] In an optional scheme, the middle shaft rotating structure comprises a servo motor, a middle shaft part and a shaft displacement sleeve part, the middle shaft part is arranged at the central line position in the refining extraction tank body and is rotationally connected with the top wall of the refining extraction tank body, the servo motor is arranged at the top of the refining extraction tank body and is connected with the top of the middle shaft part, the shaft displacement sleeve part is axially slidably arranged on the middle shaft part, the top of the shaft displacement sleeve part is connected with the push-pull rod, the middle part of the sieve plate flow guide structure is rotationally connected with the shaft displacement sleeve part, and the micro-diameter stirring rod is fixed on the outer wall of the shaft displacement sleeve part.

[0009] In an optional scheme, the raw material liquid inlet end is aligned with the downflow zone located at the uppermost side, and the extractant inlet end corresponds to the lower side of the sieve plate flow guide structure located at the lowest position.

[0010] In an optional scheme, the maximum rotation angle of the middle shaft part is 20 degrees, and the maximum displacement of the shaft displacement sleeve part and the sieve plate flow guide structure moving in the axial direction of the servo motor is 6 mm.

[0011] In an alternative: the sieve plate drainage structure includes a sieve plate part and a drainage sieve hole part arranged at the middle position of the sieve plate part, one side of the sieve plate part has a downwardly extending lower baffle, a collection zone is formed between the lower side of the sieve plate part and the horizontal flow zone, and the micro-diameter stirring rod is located in the collection zone; the edge of the uppermost sieve plate part is slidably sealed with the inner wall of the refined extraction tank body, and the end face of the lower baffle towards the inner wall of the refined extraction tank body is provided with a plurality of flexible rod members.

[0012] In an alternative: the plurality of flexible rod members are divided into groups and are distributed at equal intervals along the length direction of the lower baffle, and each group of flexible rod members is distributed in an inclined direction.

[0013] In an alternative: the top of the shaft moving sleeve part is provided with an upper cylinder body, the circumferential surface of the upper cylinder body is provided with a spiral groove, the top of the push-pull rod member is fixedly connected with the top of the refined extraction tank body, the bottom of the push-pull rod member extends into the spiral groove in a horizontal manner and is provided with a rotating roller member, and the rotating roller member is in rolling contact with the inner wall of the spiral groove.

[0014] By adopting the technical scheme, the present application has the following beneficial effects:

[0015] In the solvent refining equipment for rubber plasticizer processing provided by the present application, the micro-diameter stirring rod of the central shaft rotating structure cooperates with the laminated arrangement of the sieve plate drainage structure, the extractant enters the horizontal flow zone in the form of a jet, the dispersion and mixing effect is enhanced, the micro-diameter stirring rod can prevent the sieve hole from being blocked and promote the backflow of liquid drops, and the mass transfer efficiency is significantly improved; the alternative arrangement of the plurality of downflow zones and the horizontal flow zone forms multi-stage countercurrent extraction, the contact path of the two phases is prolonged, and the removal of aromatics and impurities is more sufficient; the forward and reverse alternating rotation of the central shaft rotating structure and the axial reciprocating motion of the sieve plate drainage structure cooperatively promote the spraying of the extractant and the disturbance of the raw material liquid, and further strengthen the dispersion and mass transfer; the sieve plate is moved up and down through the linkage of the push-pull rod member, the entrainment of the light phase is reduced, efficient separation of the two phases is ensured, and finally the rubber plasticizer product with high purity is obtained. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present application or the technical schemes in the prior art, the drawings needed in the following specific embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] Figure 1 It is a schematic diagram of the overall structure of the solvent refining equipment in an embodiment of the present application.

[0018] Figure 2 It is a schematic diagram of the internal structure of the refined extraction tank body in an embodiment of the present application.

[0019] Figure 3 Figure 4 is a schematic diagram of the shaft side structure of the counterflow phase combination mechanism in one embodiment of the present application.

[0020] Figure 4 Figure 5 is a front view of the counterflow phase combination mechanism in one embodiment of the present application.

[0021] Figure 5 Figure 6 is a schematic diagram of the single sieve plate drainage structure in one embodiment of the present application.

[0022] Figure 6 Figure 7 is a schematic diagram of the enlarged structure at A in Figure 6. Figure 4

[0023] Figure 8 is a schematic diagram of the enlarged structure at B in Figure 6. DETAILED DESCRIPTION

[0024] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0025] The left-right and up-down positions of each component in the drawings are only one arrangement, and the specific positions are set according to specific needs.

[0026] In one embodiment, as shown in Figure 1, the counterflow phase combination mechanism comprises a refining extraction tank 100, an extraction agent inlet end 110, a raw material liquid inlet end 120, an extraction phase discharge end 130, a raffinate phase discharge end 140, a bracket seat 200, a shaft rotation structure 400, a servo motor 410, a shaft portion 420, a shaft displacement sleeve portion 430, an upper cylinder body 440, a spiral groove 450, a sieve plate drainage structure 500, a sieve disc portion 510, a drainage sieve hole portion 520, a lower baffle 530, a flexible rod member 540, a collection area 550, a push-pull rod member 600, a rotating roller member 610, a downflow area 700, a horizontal flow area 800, and a micro-diameter stirring rod 900. Figures 1-4 ​The illustrated rubber plasticizer processing solvent refining equipment includes a refining extraction tank body 100 and a countercurrent phase combination mechanism arranged inside the refining extraction tank body 100. An extractant inlet end 110 is arranged on the outer wall of the refining extraction tank body 100 close to the bottom, and a raw material liquid inlet end 120 is arranged close to the top. An extraction phase discharge end 130 is arranged at the top of the refining extraction tank body 100, and a raffinate phase discharge end 140 is arranged at the bottom. The countercurrent phase combination mechanism includes a central shaft rotating structure 400 and a plurality of sieve plate drainage structures 500. The central shaft rotating structure 400 is arranged to rotate at the center of the refining extraction tank body 100. The plurality of sieve plate drainage structures 500 are distributed in the refining extraction tank body 100 in a stacked and equidistant manner. The central shaft rotating structure 400 penetrates the center of the sieve plate drainage structure 500 and rotates with it. The edges of the sieve plate drainage structure 500 are vertically slidingly matched with the inner wall of the refining extraction tank body 100, and one side of the sieve plate drainage structure 500 forms a downflow zone 700 with the edge of the refining extraction tank body 100. The downflow zones 700 formed by the adjacent two sieve plate drainage structures 500 and the edges of the refining extraction tank body 100 are located on the two sides of the central shaft rotating structure 400, respectively. A horizontal flow zone 800 is formed between the adjacent two sieve plate drainage structures 500, where the raw material liquid and the extractant are combined. A plurality of groups of micro-diameter stirring rods 900 corresponding to the sieve plate drainage structures 500 below are arranged on the central shaft rotating structure 400. A push-pull rod 600 is arranged on the inner top wall of the refining extraction tank body 100. The push-pull rod 600 is connected with the central shaft rotating structure 400 and the sieve plate drainage structure 500. When the central shaft rotating structure 400 is in a forward and reverse alternating rotating state, the central shaft rotating structure 400 acts on the plurality of sieve plate drainage structures 500 through the push-pull rod 600 to make them reciprocate axially relative to the refining extraction tank body 100.

[0027] In the embodiment of the present application, the refining extraction tank body 100 has a support seat 200 at the bottom and is supported by the support seat 200, the raw material liquid is a heavy phase with a larger density and enters the inside of the refining extraction tank body 100 through the raw material liquid inlet end 120, and the raw material liquid sequentially passes through the downflow zone 700 and the horizontal flow zone 800 and flows down layer by layer under the action of pressure; the extractant is a light phase with a smaller density and enters the inside of the refining extraction tank body 100 through the extractant inlet end 110, and the extractant flows upward through the sieve plate flow guide structure 500 and the horizontal flow zone 800 under the action of pressure; after the extractant passes through the sieve holes of the sieve plate flow guide structure 500, the extractant and the raw material liquid are mixed at the horizontal flow zone 800, the extractant enters the horizontal flow zone 800 in the form of a jet to cause dispersion mixing and contact mass transfer, and the flow of the extractant following the raw material liquid can also be weakened; the raw material liquid is extracted by the extractant to remove aromatics and impurities, the arrangement of the plurality of sieve plate flow guide structures 500 forms a plurality of downflow zones 700 and horizontal flow zones 800, so that the raw material liquid and the extractant are combined at multiple places to improve the sufficiency of impurity and aromatic removal; the central shaft rotating structure 400 rotates in the refining extraction tank body 100, the micro-diameter stirring rod 900 rotates with the central shaft rotating structure 400, the micro-diameter stirring rod 900 stirs the extractant concentrated on the lower side of the sieve plate flow guide structure 500, which can avoid the clogging of the sieve holes of the sieve plate flow guide structure 500, at the same time, the raw material liquid droplets mixed in the extractant will gather on the surface of the micro-diameter stirring rod 900, the volume will increase and will not pass through the sieve holes of the sieve plate flow guide structure 500, the weight will increase and will reflow along the surface of the micro-diameter stirring rod 900 to the horizontal flow zone 800, and finally flow with the raw material liquid in the horizontal flow zone 800, further improving the removal effect of impurities in the raw material liquid; during the forward and reverse rotation of the servo motor 410, the sieve plate flow guide structure 500 is acted on by the push-pull rod 600, and the sieve plate flow guide structure 500 moves axially reciprocatingly, the up-and-down reciprocating movement of the sieve plate flow guide structure 500 can promote the extractant to be sprayed through the sieve holes to cause further dispersion mixing, improve mass transfer, and further make the aromatics and impurities fully contact with the extractant, thereby further improving the removal effect of impurities and aromatics in the raw material liquid.

[0028] In one embodiment, as Figures 1-4As shown, the central shaft rotating structure 400 comprises a servo motor 410, a central shaft part 420 and a shaft shift sleeve part 430, the central shaft part 420 is arranged at the center line position in the refined extraction tank body 100 and the top part thereof is rotationally connected with the top wall of the refined extraction tank body 100; the servo motor 410 is arranged at the top part of the refined extraction tank body 100 and the output end thereof is connected with the top part of the central shaft part 420; the shaft shift sleeve part 430 is axially slidably sleeved on the central shaft part 420, the top part of the shaft shift sleeve part 430 is connected with the push-pull rod 600, the middle part of the sieve plate flow guide structure 500 is rotationally connected with the shaft shift sleeve part 430 and the micro-diameter stirring rod 900 is fixed on the outer wall of the shaft shift sleeve part 430; in the embodiment of the present application, the servo motor 410 is controlled by the instruction signal or parameter setting of the control system to flexibly change the rotation direction of the main shaft thereof, so as to realize the forward and reverse alternating rotation, the servo motor 410 drives the central shaft part 420 to rotate, the shaft shift sleeve part 430 rotates along with the central shaft part 420, and the shaft shift sleeve part 430 moves axially along the central shaft part 420 under the action of the push-pull rod 600, due to the slidable cooperation between the edge of the sieve plate flow guide structure 500 and the inner wall of the refined extraction tank body 100 and the rotational cooperation between the sieve plate flow guide structure 500 and the shaft shift sleeve part 430, the central shaft rotating structure 400 can only drive the sieve plate flow guide structure 500 to move axially reciprocatingly when being active, so that the micro-diameter stirring rod 900 rotates along with the shaft shift sleeve part 430 and stirs the extractant under the sieve plate flow guide structure 500, the sieve plate flow guide structure 500 moves up and down reciprocatingly, the axial vibration of the sieve plate flow guide structure 500 causes the sieve hole to generate periodic pressure change, so as to force the extractant to penetrate the sieve hole in the form of pulse jet, thereby enhancing the two-phase dispersion and performing contact mass transfer.

[0029] In one embodiment, as shown in Figures 1-4 the raw material liquid inlet end 120 is aligned with the lower flow zone 700 located at the uppermost side, and the extractant inlet end 110 corresponds to the lower side of the sieve plate flow guide structure 500 located at the lowest position; in the embodiment of the present application, the raw material liquid introduced into the refined extraction tank body 100 through the raw material liquid inlet end 120 directly enters the lower flow zone 700 and then flows downward along the flow direction formed by the lower flow zone 700 and the horizontal flow zone 800, thereby reducing the influence of the raw material liquid on the upper layer of extractant when the raw material liquid enters the refined extraction tank body 100; the extractant introduced into the refined extraction tank body 100 through the extractant inlet end 110 directly flows upward through the sieve hole of the sieve plate flow guide structure 500 at the lowermost layer, so as to reduce the influence of the extractant on the raw material liquid which has completed the impurity removal at the bottom of the refined extraction tank body 100.

[0030] In one embodiment, as shown in Figures 1-4As shown, the maximum angle at which the central axis portion 420 can rotate is 20 degrees and the maximum displacement of the axial sleeve portion 430 and the sieve plate drainage structure 500 along the axial movement of the servo motor 410 is 6 mm; in the embodiment of the present invention, the pitch design of the spiral groove 450 needs to match the 20° rotation limit of the central axis portion 420, and the upward displacement of the sieve plate drainage structure 500 cannot be too large, otherwise it will affect the position of the downstream area 700 and the horizontal flow area 800, and thus affect the flow direction of the raw material liquid. When the rotation angle of the central axis portion 420 is too large, the extractant on the lower side of the sieve plate drainage structure 500 will form a vortex, which will easily affect the extractant passing through the sieve holes of the sieve plate drainage structure 500.

[0031] In one embodiment, Figures 1-5 As shown, the sieve plate drainage structure 500 includes a sieve plate portion 510 and a drainage sieve hole portion 520 provided in the middle of the sieve plate portion 510, and a lower baffle 530 extending downwardly on one side of the sieve plate portion 510, and a collection area 550 is formed between the lower side of the sieve plate portion 510 and the horizontal flow area 800, and the micro-diameter stirring rod 900 is located in the collection area 550; the edge of the sieve plate portion 510 located on the uppermost side is slidably sealed against the inner wall of the refined extraction tank body 100, and a plurality of flexible rods 540 are provided on the end face of the lower baffle 530 facing the inner wall of the refined extraction tank body 100; in this embodiment of the present invention, the extractant will be collected at the collection area 550 and pass through the drainage sieve holes on the sieve plate portion 510 under the action of pressure. The extractant passes through the horizontal flow area 800 in the form of a jet and flows to the next flexible rod 540; when passing through the horizontal flow area 800, it contacts and transfers mass with the raw material liquid flowing in the horizontal flow area 800, and aromatic hydrocarbons and impurities are dissolved from the raw material liquid into the extractant. The extractant is collected in the collection area 550 and dispersed under the stirring of the micro-diameter stirring rod 900, and can quickly pass through the drainage sieve hole part 520; the surface of the micro-diameter stirring rod 900 also collects heavier raw material droplets, causing them to form larger droplets and fall down; the sieve plate part 510 and the lower baffle 530 move axially back and forth following the axial displacement sleeve part 430, and the flexible rod 540 will disturb the raw material liquid passing through the downstream area 700, so as to facilitate the dispersion of the extractant mixed in the raw material liquid and move upward.

[0032] In one embodiment, Figures 1-5 As shown, multiple flexible rods 540 are divided into multiple groups and distributed at equal intervals along the length direction of the lower baffle 530, and each group of flexible rods 540 are distributed in an inclined direction; in an embodiment of the present invention, the distribution setting of the flexible rods 540 can achieve precise action on the raw material liquid flowing through the downstream area 700, and the upper and lower rows of flexible rods 540 are staggered with each other, which can improve the dispersion effect of the raw material liquid.

[0033] In one embodiment, Figures 1-6As shown, the shaft shift sleeve part 430 is provided with an upper cylinder 440 at the top and the upper cylinder 440 has a helical groove 450 on the circumferential surface, the top of the push-pull rod 600 is fixedly connected with the top of the refined extraction tank body 100, the bottom of the push-pull rod 600 extends into the helical groove 450 in a horizontal manner and is provided with a rotating roller 610, and the rotating roller 610 is in rolling contact with the inner wall of the helical groove 450; in the embodiment of the application, when the middle shaft part 420 rotates, the shaft shift sleeve part 430 and the upper cylinder 440 rotate with the middle shaft part 420, and the rotating roller 610 moves along the helical groove 450; since the push-pull rod 600 is in a fixed state, the upper cylinder 440 can axially move relative to the middle shaft part 420 when rotating, so that the micro-diameter stirring rod 900 and the plurality of sieve plate drainage structures 500 axially and reciprocally move with the middle shaft part 420.

[0034] The above embodiment discloses a solvent refining equipment for rubber plasticizer processing, and the working principle is as follows:

[0035] 1. Countercurrent flow and multi-stage mass transfer

[0036] Raw material liquid (heavy phase) flow: the raw material liquid is injected from the raw material liquid inlet end 120 at the top of the refined extraction tank body 100 and flows downward due to the large density. The raw material liquid gradually decreases through the downflow zone 700 (the offset channel formed by the sieve plate drainage structure 500 and the inner wall of the refined extraction tank body 100) layer by layer and is finally discharged from the raffinate phase discharge end 140 at the bottom.

[0037] Extractant (light phase) flow: the extractant is injected from the extractant inlet end 110 at the bottom of the refined extraction tank body 100 and flows upward due to the small density. Under the action of pressure, the extractant penetrates the sieve holes (drainage sieve hole part 520) of the sieve plate drainage structure 500, enters the horizontal flow zone 800, and is in countercurrent contact with the downward raw material liquid to complete the mass transfer and is then discharged from the extract phase discharge end 130 at the top of the refined extraction tank body 100.

[0038] Multi-stage mixing design: the multi-layer sieve plate drainage structure 500 divides the tank body into a plurality of horizontal flow zones 800 and downflow zones 700, and the adjacent downflow zones 700 are arranged on both sides of the middle shaft to form a zigzag flow path. The raw material liquid and the extractant repeatedly contact in each horizontal flow zone 800 to realize step-by-step extraction and improve the impurity removal efficiency.

[0039] 2. Dynamic mixing and anti-blocking mechanism

[0040] Dispersion effect of the micro-diameter stirring rod 900: the micro-diameter stirring rod 900 rotates in the collection zone 550 below the sieve plate under the driving of the middle shaft rotating structure 400, stirs the extractant to avoid sieve hole blockage, and promotes the aggregation of the extractant droplets carried in the extractant to flow back to the horizontal flow zone 800 by gravity, thereby reducing the light phase entrainment.

[0041] Axial pulsation of the sieve plate: The servo motor 410 drives the middle shaft part 420 to rotate alternately in opposite directions (maximum 20°). Through the cooperation of the push-pull rod 600 and the spiral groove 450, it is converted into the axial reciprocating motion (maximum 6mm) of the shaft shift sleeve part 430, driving the sieve plate drainage structure 500 to vibrate up and down. This action has the following effects:

[0042] Promote the injection of the extractant: Pulse jet is formed at the sieve hole, enhancing the dispersion and mixing of the two phases.

[0043] Strengthen mass transfer: Vibrate the liquid film, reduce the boundary layer resistance, and accelerate the diffusion of aromatics / impurities to the extractant.

[0044] Auxiliary dispersion of flexible rod 540: The inclined flexible rod 540 on the lower baffle 530 moves up and down with the sieve plate, shearing the raw material liquid in the downflow zone 700, breaking the possible entrained extractant droplets, and promoting the floating of the light phase.

[0045] 3. Key structure synergy effect

[0046] Middle shaft rotation structure 400: The servo motor 410 drives the middle shaft part 420, and through the spiral groove 450-roller mechanism 610, the rotation is converted into axial motion, realizing the linkage control of sieve plate part 510 vibration and micro-diameter stirring rod 900 rotation.

[0047] Sieve plate drainage structure 500: Sieve plate part 510 and drainage sieve hole part 520: Directly guide the extractant jet, ensuring sufficient contact with the raw material liquid.

[0048] Lower baffle 530: Separate the downflow zone 700 and the horizontal flow zone 800, forming a controllable flow path.

[0049] Parameter limit:

[0050] The rotation angle of the middle shaft part 420 is ≤20° and the displacement of the sieve plate part 510 is ≤6mm, avoiding the influence of flow turbulence or vortex on separation efficiency.

[0051] 4. Work flow summary

[0052] Feeding stage: The raw material liquid and the extractant enter from the top and bottom of the refined extraction tank body 100 respectively, forming countercurrent.

[0053] Mixing and mass transfer stage: The extractant penetrates the sieve hole of the sieve plate drainage structure 500, contacts the raw material liquid in the horizontal flow zone 800, and dissolves impurities.

[0054] The rotation of the micro-diameter stirring rod 900 prevents clogging, and the vibration of the sieve plate strengthens mass transfer.

[0055] Separation stage: The raffinate phase (purified raw material liquid) is discharged from the bottom of the sieve plate drainage structure 500; the extractant phase loaded with impurities is discharged from the top of the sieve plate drainage structure 500.

[0056] In the description of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

Claims

1. A solvent refining device for processing rubber plasticizers, comprising a refining extraction tank body and a countercurrent combination mechanism provided inside the refining extraction tank body, wherein the outer wall of the refining extraction tank body is provided with an extractant inlet near the bottom and a raw material liquid inlet near the top, an extract phase discharge port is provided at the top of the refining extraction tank body and a raffinate phase discharge port is provided at the bottom, characterized in that: The countercurrent combination mechanism includes a central axis rotation structure and multiple sieve plate drainage structures; The central axis rotating structure is rotatably arranged at the center of the refined extraction tank body, and multiple sieve plate drainage structures are stacked and evenly spaced inside the refined extraction tank body. The central axis rotating structure passes through the center of the sieve plate drainage structure and rotates with it; The edge of the sieve plate drainage structure is vertically slidably matched with the inner wall of the refined extraction tank body, and one side of the sieve plate drainage structure and the edge of the refined extraction tank body form a downflow area; The downflow area formed by the two adjacent sieve plate drainage structures and the edge of the refined extraction tank is located on both sides of the central axis rotation structure. A horizontal flow area is formed between the two adjacent sieve plate drainage structures, where the raw material liquid and the extractant converge; The central axis rotating structure is provided with a plurality of groups of micro-diameter stirring rods corresponding to the bottom of the sieve plate drainage structure, and the micro-diameter stirring rods can rotate along with the central axis rotating structure; A push-pull rod is provided on the top wall of the refined extraction tank, and the push-pull rod is connected to the central axis rotation structure and the sieve plate drainage structure; When the central axis rotating structure is in a forward and reverse alternating rotation state, the central axis rotating structure acts on the multiple sieve plate drainage structures through push-pull rods to make them move back and forth axially relative to the refined extraction tank body; The central axis rotation structure includes a servo motor, a central axis portion and an axis shifting sleeve portion; The central axis is arranged at the center line of the refined extraction tank body and the top of the central axis is rotatably connected to the top wall of the refined extraction tank body; The servo motor is arranged on the top of the refined extraction tank and its output end is connected to the top of the central shaft; The axially movable sleeve portion can be axially slidably sleeved on the central axis portion, the top of the axially movable sleeve portion is connected to the push-pull rod, the middle portion of the sieve plate drainage structure is rotatably connected to the axially movable sleeve portion, and the micro-diameter stirring rod is fixed on the outer wall of the axially movable sleeve portion; The sieve plate drainage structure includes a sieve plate portion and a drainage sieve hole portion provided in the middle of the sieve plate portion; A lower baffle extending downward is provided on one side of the sieve plate portion, a collection area is formed between the lower side of the sieve plate portion and the advection area, and the micro-diameter stirring rod is located in the collection area; The edge of the sieve plate portion located on the uppermost side is slidably sealed with the inner wall of the refining and extraction tank body. A plurality of flexible rods are provided on the end surface of the lower baffle facing the inner wall of the refining and extraction tank body.

2. The solvent refining equipment for rubber plasticizer processing according to claim 1, characterized in that: The feed liquid inlet is aligned with the downflow zone at the uppermost side, and the extractant inlet corresponds to the lower side of the sieve plate drainage structure at the lowest position.

3. The solvent refining equipment for rubber plasticizer processing according to claim 2, characterized in that: The maximum angle at which the central axis can rotate is 20 degrees, and the maximum displacement of the axially movable sleeve portion and the sieve plate drainage structure along the axial direction of the servo motor is 6 mm.

4. The solvent refining equipment for rubber plasticizer processing according to claim 1, characterized in that: The multiple flexible rods are divided into multiple groups and are distributed at equal intervals along the length direction of the lower baffle, and the flexible rods in each group are distributed in an inclined direction.

5. The solvent refining equipment for rubber plasticizer processing according to any one of claims 1 to 4, characterized in that: The top of the shaft-shifting sleeve is provided with an upper cylinder, and the circumferential surface of the upper cylinder is provided with a spiral groove; The top of the push-pull rod is fixedly connected to the top of the refined extraction tank body, and the bottom of the push-pull rod extends horizontally into the spiral groove and is provided with a roller, which is in rolling contact with the inner wall of the spiral groove.

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