Scraped flat compacted solid-liquid separation feed leaching device

Abstract

The utility model relates to leaching device, concretely relates to scrape flat compaction's solid -liquid separation discharge leaching device. Including leaching ware, leaching ware is by the fixed cylinder wall of outside, the rotating shaft of inside center and is divided a plurality of leaching grid by separating plate and is formed, leaching ware bottom is equipped with the oil collecting hopper, the oil collecting hopper is by the grid plate and is separated into feed grid, a plurality of oil collecting grid, liquid supplementing grid, overflow grid, scraping flat grid, discharge grid in turn along the rotating direction of rotating shaft, leaching grid bottom is equipped with fixed false bottom, discharge grid connects solid discharge conveying device, solid discharge conveying device opens branch line solid conveying device, and the discharge end of solid conveying device is located above the leaching grid corresponding to overflow grid, and the scraping flat mechanism is equipped above the leaching grid above scraping flat grid. The utility model discloses through setting up scraping flat mechanism and compacts the solid material scraping flat, further reduces the gap between solids, makes solvent overflow as far as possible, reduces the pressure of subsequent solid -liquid separation.

Description

Technical Field

[0001] This utility model relates to leaching devices, specifically to a solid-liquid separation and leaching device that uses scraping and compaction. Background Technology

[0002] In the plant fiber processing industry, leaching equipment is a core component, primarily used to separate effective substances soluble in specific solvents from plant fibers. This process not only requires efficient extraction but also necessitates consideration of solvent reuse and solid-liquid separation. Traditional leaching equipment operates as follows: the plant fiber raw material is placed in the leaching chamber, and the solvent is injected from the top. After fully wetting and dissolving the target substances in the fiber, the solvent overflows from the top and flows into a specific oil collection compartment in the lower oil collection hopper. This step completes the initial contact and dissolution of the effective components between the solvent and the fiber.

[0003] To improve solvent utilization efficiency, the solvent in the oil collection tank is collected again through a dedicated recovery system and transported back to the bottom of the leaching tank via a circulation pipeline for repeated leaching from bottom to top until the set leaching effect or time requirement is met. This recycling method significantly improves solvent utilization and reduces consumption.

[0004] However, in current applications, particularly during the unloading stage after extraction, a significant problem exists: due to a special structure between the oil collection grid and the upper leaching grid—specifically, an open-type false bottom structure above the oil collection grid—when the leaching grid completes its full rotation with the shaft to a specific angle, the solid-liquid mixture (containing solvent containing dissolved active ingredients and plant fiber residue) flows through this opening into the oil collection hopper. While this design simplifies the unloading operation, it results in the solid residue typically carrying a large amount of solvent, making subsequent solid-liquid separation processes cumbersome and increasing energy consumption.

[0005] Currently, existing technologies use a churning grid to churn solid materials into an outer oil collection grid, and then pump the solid materials into an overflow grid. The increased solid content in the overflow grid results in more solvent overflowing, thus reducing the pressure on the solid-liquid separation and distillation process after the extraction step. However, even with this method, the released solids still contain a significant amount of solvent. To further improve production efficiency and reduce energy consumption, there is an urgent need for an extraction device that minimizes the amount of solvent entrained in the released solids after the extraction process. Utility Model Content

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide a scraping and compacting solid-liquid separation and leaching device. By separating a portion of the solid material to be discharged from the discharge grid and feeding it into the leaching grid corresponding to the second overflow grid in the direction of rotation of the rotating shaft, the height of the solid material in the leaching grid is higher than the height of the separation plate. Then, the rotating shaft continues to rotate to the leaching grid corresponding to the scraping grid, and the solid material is compacted and flattened by the scraping mechanism, further reducing the gaps between the solids and allowing the solvent to overflow as much as possible, thus reducing the pressure of subsequent solid-liquid separation.

[0007] The present invention relates to a solid-liquid separation and leaching device for scraping and compacting, comprising an leaching unit, which consists of an externally fixed cylindrical wall, an internally central rotating shaft, and a separation plate fixedly connected to the rotating shaft. The rotating shaft is connected to a drive device. The separation plate divides the interior of the leaching unit into several leaching compartments. An oil collecting hopper is located at the bottom of the leaching unit, with a diameter larger than that of the leaching unit above. Several dividing plates are arranged along the outer diameter from the center of the oil collecting hopper. These dividing plates sequentially separate a feed compartment, several oil collecting compartments, a replenishment compartment, an overflow compartment, a scraping compartment, and a discharge compartment along the rotation direction of the rotating shaft. A false bottom is provided at the bottom of each leaching compartment. The bottom does not rotate with the leaching tank. There is no false bottom at the bottom of the leaching tank corresponding to the discharge tank. The discharge tank is connected to a solid discharge transport device. The solid discharge transport device has a branch solid transport device. The discharge end of the solid transport device is located above the leaching tank corresponding to the overflow tank. The false bottom is equipped with a spraying mechanism corresponding to each leaching tank. The leaching tanks above the overflow tank and the leveling tank on the false bottom are not equipped with a spraying mechanism. The leaching tank above the feed tank is equipped with a feed pipe. The leaching tank above the replenishment tank is equipped with a replenishment pipe. The leaching tank above the leveling tank is equipped with a leveling mechanism.

[0008] Furthermore, the solid transport device and the solid discharge transport device are scraper conveyors.

[0009] Furthermore, the spraying mechanism includes an inlet pipe connected to the oil collection hopper, an inlet pipe connected to a pump, a pump connected to an outlet pipe, an outlet pipe connected to a spraying device, and a fixed connection to the bottom surface of the false bottom. The spraying device has several spray holes facing the leaching grid.

[0010] The spray mechanism at the bottom of each leaching cell, corresponding to the false bottom position, extracts the solvent overflowing into the oil collection hopper below and then injects it back into the leaching cell from the bottom, causing the solids inside to surge up and achieve full extraction. The height of the solids surge is controlled by the pump to ensure that it does not exceed the upper edge of the leaching cell, thus preventing solid powder from overflowing into the oil collection hopper below and causing solid loss.

[0011] Furthermore, the height of the dividing plate increases sequentially along the rotation direction of the rotation axis.

[0012] The rotation direction of the leaching chamber in the leaching unit is opposite to the direction of solvent overflow in the oil collection hopper. This allows for the use of saturated solvent to leach the solids that have just been fed in, and the use of unsaturated solvent to leach the solid powder that is about to complete the leaching process. This countercurrent leaching method is highly efficient and effective.

[0013] Furthermore, the scraping mechanism includes a baffle fixed to a fixed cylindrical wall outside the leaching tank. The baffle extends upward along the outer edge of the cylindrical wall. A front support rod and a rear support rod are sequentially arranged on the baffle along the rotation direction of the rotation axis. The front and rear support rods are connected to the scraping plate via a front spring and a rear spring, respectively. The front end of the scraping plate controlled by the front support rod is higher than the rear end of the scraping plate controlled by the rear support rod. Furthermore, the discharge compartment is connected to a solid discharge conveying device, and the side wall of the feed compartment is connected to a solvent discharge pipe.

[0014] Working principle: The feed pipe is opened to feed the solid powder to be extracted into the corresponding leaching cell above the feed grid. The rotating shaft drives the extractor to rotate via a drive device. The leaching cell rotates and passes sequentially from the feed grid through several oil collection cells, replenishment cells, overflow cells, leveling cells, and discharge cells. The replenishment pipe is opened to add solvent to each leaching cell. As solvent is continuously added, the leaching cell is filled. The solvent overflows from the top edge of the leaching cell into the oil collection cell of the oil collection hopper. The solvent in the oil collection cell is then transported through the inlet pipe, pump, and outlet pipe. The solvent is fed into the spraying device, where it is fed upwards from the bottom of the leaching cell through the spray nozzles. This causes the solid powder in the leaching cell to surge, ensuring that the solid powder and solvent are fully in contact for extraction. The solvent in the oil collection cell overflows downwards with the progressively lowering partition plates and finally flows into the feed cell. It is then transported to the solvent recovery device at a fixed rate through the solvent discharge pipe for recovery. The solvent in the feed cell has the highest saturation, thus enabling the extraction of the newly added solid powder with the most saturated solvent, thereby achieving countercurrent extraction of the solvent.

[0015] In the initial startup phase, the leaching cell is empty, and solid powder can be directly added to the leaching cell above the overflow cell. The solid material then rotates with the rotating shaft to the top of the discharge cell. Due to the absence of a false bottom between the discharge cell and the leaching cell, the solid falls directly into the discharge cell and is transported by the solid discharge conveyor at the bottom. After passing through the solid conveyor, it is returned to the leaching cell above the overflow cell. As the startup stabilizes, a portion of the solid material prepared for discharge from the discharge cell is transferred to the leaching cell above the overflow cell, making the height of the solid in the leaching cell above the overflow cell higher than the height of the separation plate. Then, the rotating shaft continues to rotate to the corresponding leaching cell above the leveling cell. The leveling mechanism compacts and levels the solid material, further reducing the gaps between the solids and allowing the solvent to overflow as much as possible, reducing the pressure of subsequent solid-liquid separation.

[0016] Specifically, the scraper plate consists of a front support rod and a rear support rod connected by a front spring and a rear spring, respectively. The front end of the scraper plate controlled by the front support rod is higher than the rear end of the scraper plate controlled by the rear support rod. Solid powder that is higher than the separation plate is scraped over by the inclined upward fan-shaped scraper plate. At the same time, in order to prevent the scraped solids from overflowing onto the outer edge of the leaching tank cylinder wall and falling into the oil collection grid below to contaminate the solvent, a baffle is set. With the cooperation of the baffle and the scraper plate, the solid powder is scraped and compacted, preventing solids from overflowing and being lost. Moreover, the scraper plate is connected by springs, which will not generate much resistance to the rotation inside the leaching tank. It is simple and easy to use.

[0017] After being scraped and compacted, the solid powder rotates to the top of the discharge grid. Because there is no false bottom between the discharge grid and the leaching grid, the solid falls directly into the discharge grid and is transported by the solid discharge conveyor at the bottom. Most of it enters the next stage for solid-liquid separation, while a portion of the solid is returned to the leaching grid above the overflow grid by the solid conveyor, keeping the height of the solid above the height of the separation plate, thus forming a cycle.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] (1) This utility model separates a portion of the solid material to be discharged from the discharge grid and injects it into the leaching grid corresponding to the second overflow grid in front of the rotating shaft in the direction of rotation. This makes the height of the solid material in the leaching grid higher than the height of the separation plate. Then the rotating shaft continues to rotate to the leaching grid corresponding to the scraping grid. The scraping mechanism compacts and scrapes the solid material, further reducing the gaps between the solids, so that the solvent overflows as much as possible, reducing the pressure of subsequent solid-liquid separation.

[0020] (2) In order to prevent the scraped solid from overflowing onto the outer edge of the leaching tank cylinder and falling into the oil collection grid below to contaminate the solvent, this utility model is equipped with a baffle. With the cooperation of the baffle and the scraping plate, the solid powder is scraped and compacted, so that the solid will not overflow and be lost.

[0021] (3) The scraper plate described in this utility model is connected by a spring, which will not generate a lot of resistance to the rotation inside the leachator, and is simple and easy to use. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of the present invention, show:

[0023] Figure 1 This is a three-dimensional structural diagram of the scraping and compacting solid-liquid separation and leaching device of the present invention;

[0024] Figure 2 This is a top view of the scraping and compacting solid-liquid separation and leaching device of this utility model;

[0025] Figure 3 This is a three-dimensional structural diagram of the oil collecting hopper of the scraping and compacting solid-liquid separation and leaching device of this utility model.

[0026] Figure 4 This is a bottom view of the false bottom of the scraping and compacting solid-liquid separation and leaching device of this utility model;

[0027] Figure 5 This is a three-dimensional structural diagram of the scraping mechanism described in this utility model;

[0028] In the picture:

[0029] 1. Leacher; 2. Leaching grid; 3. Separation plate; 4. Scraping grid; 5. Overflow grid; 6. Discharge grid; 7. Feed pipe; 8. Liquid replenishment pipe; 9. False bottom; 10. Rotating shaft; 11. Spraying device; 12. Discharge pipe; 13. Pump; 14. Liquid inlet pipe; 15. Solid transport device; 16. Oil hopper; 17. Oil collection grid; 18. Dividing plate; 19. Scraping mechanism; 20. Solid discharge transport device; 21. Solvent discharge pipe; 22. Feed grid; 23. Liquid replenishment grid; 24. Scraping plate; 25. Baffle; 26. Front support rod; 27. Rear support rod; 28. Front spring; 29. ​​Rear spring. Detailed Implementation

[0030] The present invention will be further described below with reference to the embodiments, but the scope of protection of the present invention is not limited thereto.

[0031] Unless otherwise specified, all raw materials used in the examples were commercially available.

[0032] Example 1

[0033] like Figure 1-5As shown, the device includes a leachator 1, which consists of an externally fixed cylindrical wall, an internally centrally rotating shaft 10, and a separation plate 3 fixedly connected to the rotating shaft 10. The rotating shaft 10 is connected to a drive device. The separation plate 3 divides the interior of the leachator 1 into several leaching compartments 2. The bottom of the leachator 1 is provided with an oil collecting hopper 16, the diameter of which is larger than that of the leachator 1 above. Inside the oil collecting hopper 16, several dividing plates 18 are provided along the outer diameter from the center. The dividing plates 18 sequentially divide the leachator 18 into a feed compartment 22, several oil collecting compartments 17, a replenishment compartment 23, an overflow compartment 5, a leveling compartment 4, and a discharge compartment 6 along the rotation direction of the rotating shaft 10. The bottom of the leaching compartment 2 is provided with a false bottom 9, which does not rotate with the leachator 1. In this system, no false bottom 9 is provided at the bottom of the leaching cell 2 corresponding to the discharge cell 6. The discharge cell 6 is connected to the solid discharge transport device 20. The solid discharge transport device 20 has a branch solid transport device 15. The discharge end of the solid transport device 15 is located above the leaching cell 2 corresponding to the overflow cell 5. The false bottom 9 is provided with a spraying mechanism corresponding to each leaching cell 2. The leaching cell 2 above the overflow cell 5 and the leveling cell 4 is not provided with a spraying mechanism. The leaching cell 2 above the feed cell 22 is provided with a feed pipe 7. The leaching cell 2 above the replenishment cell 23 is provided with a replenishment pipe 8. The leaching cell 2 above the leveling cell 4 is provided with a leveling mechanism 19.

[0034] It is understood that the solid transport device 15 and the solid discharge transport device 20 are scraper conveyors. It is understood that the spraying mechanism includes an inlet pipe 14 connected to the oil collection hopper 16, an inlet pipe 14 connected to a pump 13, a pump 13 connected to an outlet pipe 12, an outlet pipe 12 connected to a spraying device 11, which is fixedly connected to the bottom surface of the false bottom 9. The spraying device 11 has several spray holes facing the leaching grid 2.

[0035] The spray mechanism at the bottom of each leaching cell 2, corresponding to the position of the false bottom 9, extracts the solvent overflowing into the oil collection hopper 16 below and then injects it back into the bottom of the leaching cell 2, causing the solids inside to surge up and achieve full leaching. The height of the solids surge is controlled by the pump 13 to ensure that it does not exceed the upper edge of the leaching cell 2, thus preventing solid powder from overflowing into the oil collection hopper 16 below and causing solid loss.

[0036] Understandably, the height of the dividing plate 18 increases sequentially along the rotation direction of the rotation axis 10.

[0037] The rotation direction of the leaching chamber 2 in the leaching unit 1 is opposite to the direction of solvent overflow in the oil collection hopper 16. This enables the use of saturated solvent to leach the solid that has just been fed in, and the use of unsaturated solvent to leach the solid powder that is about to complete the leaching process. This countercurrent leaching method is highly efficient and effective.

[0038] Understandably, the scraping mechanism 19 includes a baffle 25 fixed to a fixed cylindrical wall outside the leaching tank 1. The baffle 25 extends upward along the outer edge of the cylindrical wall. A front support rod 26 and a rear support rod 27 are sequentially arranged on the baffle 25 along the rotation direction of the rotation axis 10. The front support rod 26 and the rear support rod 27 are connected to the scraping plate 24 through a front spring 28 and a rear spring 29, respectively. The front end of the scraping plate 24 controlled by the front support rod 26 is higher than the rear end of the scraping plate 24 controlled by the rear support rod 27.

[0039] Understandably, the discharge compartment 6 is connected to the solid discharge conveying device 20, and the side wall of the feed compartment 22 is connected to the solvent discharge pipe 21.

[0040] Working principle: The feed pipe 7 is opened to pump the solid powder to be extracted into the corresponding leaching cell 2 above the feed cell 22. The rotating shaft 10 drives the extractor 1 to rotate via the drive device. The leaching cell 2 of the extractor 1 rotates and passes sequentially from the feed cell 22 through several oil collection cells 17, replenishment cells 23, overflow cells 5, leveling cells 4, and discharge cells 6. The replenishment pipe 8 is opened to add solvent to each leaching cell 2. As the solvent is continuously added, the leaching cell 2 is filled. The solvent overflows from the top edge of the leaching cell 2 downwards into the oil collection cell 17 of the oil collection hopper 16. The solvent in the oil collection cell 17 then flows through the inlet pipe 14 and the pump... 13. The liquid outlet pipe 12 transports the solvent to the spraying device 11. The solvent is replenished from the bottom of the leaching cell 2 through the spraying holes on the spraying device 11, which causes the solid powder in the leaching cell 2 to surge, so that the solid powder and the solvent can fully contact and extract the solvent. The solvent in the oil collection cell 17 overflows downward with the progressively lowering dividing plate 18, and finally flows into the feed cell 22. It is transported to the solvent recovery device at a fixed rate through the solvent discharge pipe 21 for recovery. The solvent saturation in the feed cell 22 is the highest. In this way, the newly added solid powder can be extracted with the solvent with the highest saturation, thereby realizing the countercurrent extraction of solvent.

[0041] In the initial stage of startup, the leaching cell 2 is empty, and solid powder can be directly added to the leaching cell 2 above the overflow cell 5. Then, the solid material rotates with the rotating shaft 10 to the top of the discharge cell 6. Because the false bottom 9 between the discharge cell 6 and the leaching cell 2 is missing, the solid falls directly into the discharge cell 6 and is transported by the solid discharge conveying device 20 at the bottom. After passing through the solid conveying device 15, it is returned to the leaching cell 2 above the overflow cell 5. As the startup stabilizes, a portion of the solid prepared for discharge from the discharge cell 6 is transferred into the leaching cell 2 above the overflow cell 5, so that the height of the solid in the leaching cell 2 above the overflow cell 5 is higher than the height of the separation plate 3. Then, the rotating shaft 10 continues to rotate to the leaching cell 2 above the leveling cell 4. The leveling mechanism 19 compacts and levels the solid material, further reducing the gaps between the solids, allowing the solvent to overflow as much as possible, and reducing the pressure of subsequent solid-liquid separation.

[0042] Specifically, the scraper plate 24 is connected to the front support rod 26 and the rear support rod 27 by the front spring 28 and the rear spring 29, respectively. The front end of the scraper plate 24 controlled by the front support rod 26 is higher than the rear end of the scraper plate 24 controlled by the rear support rod 27. Solid powder that is higher than the height of the separation plate 3 is scraped over by the inclined upward fan-shaped scraper plate 24. At the same time, in order to prevent the scraped solid from overflowing to the outer edge of the cylinder wall of the leaching tank 1 and falling into the oil collection grid below to contaminate the solvent, a baffle 25 is set. With the cooperation of the baffle 25 and the scraper plate 24, the solid powder is scraped and compacted, and the solid will not overflow and be lost. Moreover, the scraper plate 24 is connected by springs, which will not generate a lot of resistance to the rotation inside the leaching tank 1. It is simple and easy to use.

[0043] After being scraped and compacted, the solid powder rotates to the top of the discharge grid 6. Because the false bottom 9 between the discharge grid 6 and the leaching grid 2 is missing, the solid falls directly into the discharge grid 6 and is transported by the solid discharge conveying device 20 at the bottom. Most of it enters the next stage for solid-liquid separation, while a portion of the solid is returned to the leaching grid 2 above the overflow grid 5 by the solid conveying device 15, keeping the height of the solid above the separation plate 3 to form a cycle.

Claims

1. A solid-liquid separation and leaching device for scraping and compacting materials, characterized in that, The device includes an extractor (1), which consists of an externally fixed cylindrical wall, an internally central rotating shaft (10), and a separation plate (3) fixedly connected to the rotating shaft (10). The rotating shaft (10) is connected to a drive device. The separation plate (3) divides the interior of the extractor (1) into several extraction compartments (2). The bottom of the extractor (1) is provided with an oil collecting hopper (16), the diameter of which is larger than that of the extractor (1) above. Several dividing plates (18) are provided inside the oil collecting hopper (16) along the outer diameter from the center. The dividing plates (18) sequentially divide the extractor into a feed compartment (22), several oil collecting compartments (17), a replenishment compartment (23), an overflow compartment (5), a leveling compartment (4), and a discharge compartment (6) along the rotation direction of the rotating shaft (10). The bottom of the extraction compartment (2) is provided with a false bottom (9), which does not follow the extractor (1). Rotate, and no false bottom (9) is set at the bottom of the leaching cell (2) corresponding to the discharge cell (6). The discharge cell (6) is connected to the solid discharge transport device (20). The solid discharge transport device (20) has a branch solid transport device (15). The discharge end of the solid transport device (15) is located above the leaching cell (2) corresponding to the overflow cell (5). The false bottom (9) is provided with a spraying mechanism corresponding to each leaching cell (2). The leaching cell (2) above the overflow cell (5) and the leveling cell (4) on the false bottom (9) is not provided with a spraying mechanism. The leaching cell (2) above the feed cell (22) is provided with a feed pipe (7). The leaching cell (2) above the replenishment cell (23) is provided with a replenishment pipe (8). The leaching cell (2) above the leveling cell (4) is provided with a leveling mechanism (19).

2. The solid-liquid separation and leaching device for scraping and compacting according to claim 1, characterized in that, The solid transport device (15) and the solid discharge transport device (20) are scraper conveyors.

3. The solid-liquid separation and leaching device for scraping and compacting according to claim 1, characterized in that, The spraying mechanism includes an inlet pipe (14) connected to the oil collection hopper (16), an inlet pipe (14) connected to a pump (13), a pump (13) connected to an outlet pipe (12), an outlet pipe (12) connected to a spraying device (11), which is fixedly connected to the bottom surface of the false bottom (9). The spraying device (11) has several spray holes facing the leaching grid (2).

4. The solid-liquid separation and leaching device for scraping and compacting according to claim 1, characterized in that, The height of the dividing plate (18) increases sequentially along the rotation direction of the rotation axis (10).

5. The solid-liquid separation and leaching device for scraping and compacting according to claim 1, characterized in that, The scraping mechanism (19) includes a baffle (25) fixed on a fixed cylindrical wall outside the leaching tank (1). The baffle (25) extends upward along the outer edge of the cylindrical wall. A front support rod (26) and a rear support rod (27) are arranged sequentially on the baffle (25) along the rotation direction of the rotation axis (10). The front support rod (26) and the rear support rod (27) are connected to the scraping plate (24) through a front spring (28) and a rear spring (29), respectively. The front end of the scraping plate (24) controlled by the front support rod (26) is higher than the rear end of the scraping plate (24) controlled by the rear support rod (27).

6. The solid-liquid separation and leaching device for scraping and compacting according to claim 1, characterized in that, The side wall of the feed compartment (22) is connected to the solvent discharge pipe (21).

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