Polymer solid-liquid circulating separation device

Abstract

The utility model relates to the technical field of solid -liquid separation, especially a kind of polymer solid-liquid circulating separation device;It can further reduce the saturated solution amount in polymeric solid, improve solid-liquid separation effect and separation efficiency;Including separation cylinder, filter cartridge and centrifugal extrusion mechanism installed in separation cylinder, solution cavity is formed between the inner wall of separation cylinder and filter cartridge outer wall, the upper middle part of filter cartridge is equipped with multiple filter holes of uniform distribution, filter element is equipped in filter hole, the upper portion of filter cartridge and the upper portion of separation cylinder inner wall form liquid inlet chamber, the upper portion of separation cylinder outer wall is equipped with the liquid inlet pipe that communicates with liquid inlet chamber, the lower portion of separation cylinder outer wall is equipped with the liquid outlet pipe that communicates with solution cavity, separation cylinder bottom is equipped with the discharge pipe that communicates with filter cartridge inside, centrifugal extrusion mechanism includes hollow shaft rotatably installed in separation cylinder, rotation driver for the power of hollow shaft rotation, shaft rod slidably installed in hollow shaft and lifting driver for the power of shaft rod up-down sliding.

Description

Technical Field

[0001] This utility model relates to the technical field of polymer solid-liquid separation, and in particular to a polymer solid-liquid circulating separation device. Background Technology

[0002] In the preparation of polymers such as polyaluminum chloride, solid-liquid filtration separation is commonly used to obtain the solid polymer. For example, utility model patent application CN222829198U discloses a solid-liquid circulating separation device, including a separation cylinder, an extension box fixedly connected to the outer surface of the separation cylinder, a top cover fixedly connected to the top of the separation cylinder by bolts, and a feeding pipe fixedly connected to the upper end face of the top cover. A stirring rod can uniformly stir the solution, and the separated solution can re-enter the separation cylinder, enabling circulating solid-liquid separation of the raw materials.

[0003] However, it is suitable for separating a small amount of solids in the raw materials to improve the cleanliness of the polyaluminum chloride solution. But when separating the polymer solids after precipitation, due to the large content of polymer solids, a large amount of saturated polyaluminum chloride solution remains in the polyaluminum chloride solids during the separation process, and the solid-liquid separation is incomplete. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a polymer solid-liquid circulation separation device that further reduces the amount of saturated solution in polymeric solids and improves the solid-liquid separation effect and efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a polymer solid-liquid circulation separation device, comprising a separation cylinder, a filter cylinder installed inside the separation cylinder, and a centrifugal extrusion mechanism. A solution cavity is formed between the inner wall of the separation cylinder and the outer wall of the filter cylinder. The upper middle part of the filter cylinder is provided with a plurality of evenly distributed filter holes, and filter elements are provided inside the filter holes. A liquid inlet cavity is formed between the upper part of the filter cylinder and the upper part of the inner wall of the separation cylinder. A liquid inlet pipe communicating with the liquid inlet cavity is provided on the upper part of the outer wall of the separation cylinder. A liquid outlet pipe communicating with the solution cavity is provided on the lower part of the outer wall of the separation cylinder. A discharge pipe communicating with the inside of the filter cylinder is installed at the bottom of the separation cylinder. The centrifugal extrusion mechanism includes a hollow shaft rotatably installed inside the separation cylinder, a rotary driver that provides power for the rotation of the hollow shaft, a shaft rod slidably installed inside the hollow shaft, and a lifting driver that provides power for the vertical sliding of the shaft rod. The bottom of the hollow shaft extends into the upper part of the filter cylinder, one end of the shaft rod extends into the lower part of the filter cylinder, and the other end of the shaft rod is rotatably connected to the lifting driver. A spiral conveying blade is installed on the lower section of the shaft rod.

[0006] Furthermore, the filter element can be a fine-mesh filter, a filter membrane, etc.

[0007] A discharge valve is installed at the discharge pipe, and the discharge valve is normally closed when not discharging material; the rotary drive is preferably an electric motor, but other equivalent components that drive the hollow shaft to rotate can also be used.

[0008] The lifting drive is preferably a telescopic cylinder, but other equivalent components such as a mechanical slide table that can drive the shaft to slide up and down can also be used. A polygonal slide is provided inside the hollow shaft, and the outer wall of the shaft fits into the polygonal slide. The shaft is slidably installed in the polygonal slide. The top of the shaft is rotatably connected to the lifting drive through a mechanical shaft seal or the like. Both the rotary drive and the lifting drive are installed on the top of the separation cylinder.

[0009] Preferably, the system also includes a storage tank and a circulation pump. The storage tank is provided with an inlet and a replenishment outlet. The outlet end of the drain pipe is located above the inlet. The input end of the circulation pump is connected to the inside of the storage tank, and the output end of the circulation pump is connected to the input end of the inlet pipe.

[0010] Preferably, a scraper assembly is installed on the hollow shaft. The scraper assembly is located in the filter hole area on the filter cartridge and is used to clean the solid polymer adhering to the inner wall of the filter cartridge.

[0011] Preferably, the scraper assembly includes a cross brace, a sleeve, and multiple plastic scrapers fixedly connected to the hollow shaft. The cross brace is fixedly connected to the inner wall of the sleeve, and the multiple plastic scrapers are fixedly installed on the outer wall of the sleeve and evenly distributed around the outer wall of the sleeve at equal intervals. The end of the plastic scraper away from the sleeve is bent in the opposite direction of the sleeve's rotation direction.

[0012] Furthermore, the plastic scraper can be made of a metal plate or plastic plate with a certain degree of toughness, and the edge of the plastic scraper is in close contact with the inner wall of the filter cartridge.

[0013] Preferably, the inner wall of the filter cartridge is provided with a vertical material leakage channel, and the distance between the inner wall of the vertical material leakage channel and the central axis of the hollow shaft is greater than the distance between the inner wall of the filter cartridge and the central axis of the hollow shaft.

[0014] Preferably, an inclined filter basket is installed at the liquid inlet; further, the filter basket is detachably installed at the liquid inlet.

[0015] Preferably, the liquid storage tank is equipped with an overflow trough that communicates with the upper part of the liquid storage tank.

[0016] Compared with the prior art, this utility model provides a polymer solid-liquid circulation separation device with the following beneficial effects: In this device, a saturated polymer solution is injected into a filter cartridge through an inlet pipe. After being filtered by a filter element at the filter holes, the solution enters the solution chamber and is discharged through a drain pipe. A rotating driver drives a hollow shaft to rotate, which in turn drives a shaft and a spiral conveyor blade on the shaft to rotate. Initially, the spiral conveyor blade is far from the bottom wall of the filter cartridge. During its rotation, the spiral conveyor blade agitates the saturated polymer solution, causing the precipitated polymer solids to settle to the bottom of the filter cartridge. After a period of time, a lifting driver moves the shaft downwards, and the spiral conveyor blade feeds downwards during its rotation. The spiral conveyor blade compresses the polymer settled at the bottom of the filter cartridge, causing the residual solution in the polymer solids to move upwards. After settling and compression, the polymer solids are discharged through the discharge pipe, allowing for the collection of polymer solids with lower solution content, further reducing the amount of saturated solution in the polymer solids and improving the solid-liquid separation effect and efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a schematic diagram of the left-side planar structure of this utility model.

[0019] Figure 3 This is the utility model Figure 2 Schematic diagram of the cross-sectional structure at point AA.

[0020] Figure 4 This is the utility model Figure 3 Schematic diagram of the cross-sectional structure at point BB.

[0021] The following are labels in the attached diagram: 1. Separation cylinder; 2. Filter cylinder; 3. Filter holes; 4. Inlet pipe; 5. Drain pipe; 6. Discharge pipe; 7. Hollow shaft; 8. Rotary drive; 9. Shaft; 10. Lifting drive; 11. Screw conveyor blade; 12. Storage tank; 13. Circulation pump; 14. Inlet; 15. Replenishment port; 16. Horizontal support; 17. Sleeve; 18. Plastic scraper; 19. Vertical material leakage channel; 20. Filter basket; 21. Overflow trough. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0023] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] Example 1 Please refer to Figures 1-4 A polymer solid-liquid circulation separation device includes a separation cylinder 1, a filter cylinder 2 installed inside the separation cylinder 1, and a centrifugal extrusion mechanism. A solution cavity is formed between the inner wall of the separation cylinder 1 and the outer wall of the filter cylinder 2. Multiple evenly distributed filter holes 3 are provided in the upper middle part of the filter cylinder 2, and filter elements, such as fine-mesh filters or filter membranes, are installed inside the filter holes 3. A liquid inlet cavity is formed between the upper part of the filter cylinder 2 and the upper part of the inner wall of the separation cylinder 1. A liquid inlet pipe 4 communicating with the liquid inlet cavity is provided on the upper part of the outer wall of the separation cylinder 1, and a liquid outlet pipe 5 communicating with the solution cavity is provided on the lower part of the outer wall of the separation cylinder 1. A discharge pipe 6 communicating with the interior of the filter cylinder 2 is installed at the bottom of the separation cylinder 1. A discharge valve is installed at the discharge pipe 6, and the discharge valve is normally closed when not discharging.

[0026] The centrifugal extrusion mechanism includes a hollow shaft 7 rotatably mounted inside the separation cylinder 1, a rotary drive 8 that provides power for the rotation of the hollow shaft 7, a shaft 9 slidably mounted inside the hollow shaft 7, and a lifting drive 10 that provides power for the vertical sliding of the shaft 9. The bottom of the hollow shaft 7 extends into the upper part of the filter cylinder 2, one end of the shaft 9 extends into the lower part of the filter cylinder 2, and the other end of the shaft 9 is rotatably connected to the lifting drive 10. A spiral conveying blade 11 is installed on the lower section of the shaft 9. The rotary drive 8 is preferably an electric motor, but other equivalent components that drive the hollow shaft 7 to rotate can also be used.

[0027] In this embodiment, the lifting drive 10 is preferably a telescopic cylinder, but other equivalent components such as a mechanical slide table that can drive the shaft 9 to slide up and down can also be used. A polygonal slide is provided inside the hollow shaft 7, and the outer wall of the shaft 9 fits into the polygonal slide. The shaft 9 is installed in the polygonal slide that can slide up and down. The top of the shaft 9 is rotatably connected to the lifting drive 10 through a mechanical shaft seal or the like. Both the rotating drive 8 and the lifting drive 10 are installed on the top of the separating cylinder 1.

[0028] The polymer solid-liquid circulation separation device also includes a storage tank 12 and a circulation pump 13. The storage tank 12 is provided with an inlet 14 and a replenishment port 15. The outlet end of the drain pipe 5 is located above the inlet 14. The input end of the circulation pump 13 is connected to the inside of the storage tank 12, and the output end of the circulation pump 13 is connected to the input end of the inlet pipe 4.

[0029] An inclined filter basket 20 is installed at the liquid inlet 14; furthermore, the filter basket 20 is detachably installed at the liquid inlet 14; when there is too much solid polymer in the filter basket 21, the filter basket 21 can be lifted and the polymer poured out.

[0030] Furthermore, an electric heating element for heating the solution can be installed inside the storage tank 12 to increase the solution temperature, accelerate solution evaporation, and increase the amount of polymer precipitation; saturated polymer solution can be replenished into the storage tank 12 through the inlet 14. An overflow trough 21 communicating with the upper part of the storage tank 12 is installed on the storage tank 12.

[0031] The saturated solution discharged through the drain pipe 5 falls into the filter basket 21. The solid polymer remaining in the saturated solution is further filtered by the filter basket 20. The filtered saturated solution enters the storage tank 12. The saturated solution is pressurized by the pressurizing pump and then injected back into the filter cartridge 2 through the inlet 14 for filtration. This cycle is repeated to separate the polymer solids and the solution. The saturated solution can also settle in the storage tank 12. The settled polymer solids, along with the solution, are pressurized by the circulation pump 13 and injected into the filter cartridge 2. After sufficient filtration, part of the purified liquid can flow out through the overflow tank 21. The operator collects the purified liquid and further concentrates it through external equipment before injecting it back into the storage tank 12 through the replenishment port 15.

[0032] Please refer to Figure 3 and Figure 4 A scraper assembly is installed on the hollow shaft 7. The scraper assembly is located in the filter hole 3 area on the filter cartridge 2. The scraper assembly is used to clean the solid polymer adhering to the inner wall of the filter cartridge 2.

[0033] Specifically, the scraper assembly includes a cross brace 16, a sleeve 17, and multiple plastic scrapers 18 that are fixedly connected to the hollow shaft 7. The cross brace 16 is fixedly connected to the inner wall of the sleeve 17, and the multiple plastic scrapers 18 are fixedly installed on the outer wall of the sleeve 17 and are evenly distributed around the outer wall of the sleeve 17. The end of the plastic scraper 18 away from the sleeve 17 is bent in the opposite direction of the rotation direction of the sleeve 17. Furthermore, the plastic scraper 18 can be made of a metal plate or plastic plate with a certain toughness, and the edge of the plastic scraper 18 is in close contact with the inner wall of the filter cartridge 2.

[0034] The filter cartridge 2 has a vertical material leakage channel 19 on its inner wall. The distance between the inner wall of the vertical material leakage channel 19 and the central axis of the hollow shaft 7 is greater than the distance between the inner wall of the filter cartridge 2 and the central axis of the hollow shaft 7.

[0035] During the rotation of the hollow shaft 7, the cross brace 16 and the sleeve 17 rotate, and multiple plastic scrapers 18 rotate synchronously with the sleeve 17. The rotation direction of the plastic scrapers 18 can be referenced. Figure 3 As indicated by the arrow, the plastic scraper 18 rotates synchronously with the solution inside the filter cartridge 2, further improving the swirling effect of the filter cartridge 2 and accelerating the sedimentation of polymer solids. At the same time, it can promptly scrape off the polymer solids adhering to the filter holes 3 to ensure the solution throughput of the filter element and prevent excessive adhesion of polymer solids from clogging the filter holes 3 and affecting the solid-liquid treatment of the polymer. Under the action of centrifugal force, the polymer solids scraped off by the plastic scraper 18 tend to move away from the center of the filter cartridge 2, while the vertical discharge channel 19 can allow the polymer solids scraped off by the plastic scraper 18 to enter. This part of the polymer solids can fall directly to the bottom of the filter cartridge 2 and avoid being captured again by the plastic scraper 18, thereby effectively reducing the adhesion of polymer solids on the plastic scraper 18.

[0036] The polymer solid-liquid circulation separation device provided by this utility model is used as follows: A saturated polymer solution containing polymer solids is injected into the storage tank 12 through the replenishment port 15. The circulation pump 13 pressurizes the solution and injects it into the filter cartridge 2 through the inlet pipe 4. The solution is filtered through the filter element at the filter holes 3 and enters the solution chamber. After being discharged through the drain pipe 5, it falls back into the inlet 14 of the storage tank 12, and the solution circulates. Most of the polymer solids remain in the filter cartridge 2. The drive 8 rotates the hollow shaft 7, which in turn rotates the shaft 9 and the spiral conveying blade 11 and the plastic scraper 18 on the shaft 9. Initially, the spiral conveying blade 11 is far from the bottom wall of the filter cartridge 2. During the rotation of the spiral conveying blade 11 and the plastic scraper 18, the solids are separated from the bottom wall of the filter cartridge 2. The polymer precipitation creates a saturated solution, which agitates the polymer solids and causes them to settle to the bottom of the filter cartridge 2. After a period of time, the lifting drive 10 moves the shaft 9 downward, and the spiral conveyor blade 11 feeds downward during rotation. The spiral conveyor blade 11 compresses the polymer solids settled at the bottom of the filter cartridge 2. During the compression process, the residual solution in the polymer solids moves to the top of the filter cartridge 2. The polymer solids after sedimentation and compression are discharged through the discharge pipe 6 and collected. The solution entering the storage tank 12 decreases in concentration as the replenishment volume increases and the amount of solids contained in the polymer decreases. The upper layer of clean liquid flows out through the overflow tank 21 for collection and further concentration.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A polymer solid-liquid circulation separation device, characterized in that, The system includes a separation cylinder (1), a filter cylinder (2) installed inside the separation cylinder (1), and a centrifugal extrusion mechanism. A solution cavity is formed between the inner wall of the separation cylinder (1) and the outer wall of the filter cylinder (2). The upper middle part of the filter cylinder (2) is provided with a plurality of evenly distributed filter holes (3). A filter element is provided inside the filter holes (3). The upper part of the filter cylinder (2) and the upper part of the inner wall of the separation cylinder (1) form a liquid inlet cavity. The upper part of the outer wall of the separation cylinder (1) is provided with a liquid inlet pipe (4) communicating with the liquid inlet cavity. The lower part of the outer wall of the separation cylinder (1) is provided with a liquid outlet pipe (5) communicating with the solution cavity. The bottom of the separation cylinder (1) is equipped with a discharge pipe (6) communicating with the inside of the filter cylinder (2). The centrifugal extrusion mechanism includes a hollow shaft (7) rotatably installed in the separation cylinder (1), a rotary driver (8) that provides power for the rotation of the hollow shaft (7), a shaft (9) slidably installed in the hollow shaft (7), and a lifting driver (10) that provides power for the vertical sliding of the shaft (9). The bottom of the hollow shaft (7) extends into the upper part of the filter cylinder (2), one end of the shaft (9) extends into the lower part of the filter cylinder (2), and the other end of the shaft (9) is rotatably connected to the lifting driver (10). The lower section of the shaft (9) is equipped with a spiral conveying blade (11).

2. The polymer solid-liquid circulation separation device according to claim 1, characterized in that, It also includes a storage tank (12) and a circulation pump (13). The storage tank (12) is provided with an inlet (14) and a replenishment port (15). The outlet end of the drain pipe (5) is located above the inlet (14). The input end of the circulation pump (13) is connected to the inside of the storage tank (12), and the output end of the circulation pump (13) is connected to the input end of the inlet pipe (4).

3. The polymer solid-liquid circulation separation device according to claim 1, characterized in that, A scraper assembly is installed on the hollow shaft (7). The scraper assembly is located in the filter hole (3) area on the filter cartridge (2). The scraper assembly is used to clean the solid polymer adhering to the inner wall of the filter cartridge (2).

4. The polymer solid-liquid circulation separation device according to claim 3, characterized in that, The scraper assembly includes a cross brace (16) fixedly connected to the hollow shaft (7), a sleeve (17), and a plurality of plastic scrapers (18). The cross brace (16) is fixedly connected to the inner wall of the sleeve (17), and the plurality of plastic scrapers (18) are fixedly installed on the outer wall of the sleeve (17) and are evenly distributed around the outer wall of the sleeve (17). The end of the plastic scraper (18) away from the sleeve (17) is bent in the opposite direction of the rotation direction of the sleeve (17).

5. The polymer solid-liquid circulation separation device according to claim 1, characterized in that, The filter cartridge (2) has a vertical material leakage channel (19) on its inner wall. The distance between the inner wall of the vertical material leakage channel (19) and the central axis of the hollow shaft (7) is greater than the distance between the inner wall of the filter cartridge (2) and the central axis of the hollow shaft (7).

6. The polymer solid-liquid circulation separation device according to claim 2, characterized in that, An inclined filter basket (20) is installed at the liquid inlet (14).

7. The polymer solid-liquid circulation separation device according to claim 2, characterized in that, An overflow trough (21) is installed on the liquid storage tank (12) and communicates with the upper part of the liquid storage tank (12).

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