Leaching device for solid-liquid separation discharging
By violently swelling the solid in the leaching grid above the leaching grid of the leaching device and transporting it to the leaching grid above the overflow grid, the solvent is overflowed, and the problem of complex solid-liquid separation and high energy consumption in the prior art is solved, and the effect of simplifying the subsequent separation process and reducing energy consumption is achieved.
Patent Information
- Application Number
- CN202422229111.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-11
AI Technical Summary
The existing leaching devices have complex solid-liquid separation and high energy consumption during the discharge stage, especially because the false bottom design between the oil collecting grid and the leaching grid causes the solid to carry a large amount of solvent, which affects the subsequent separation process.
A leaching device for solid-liquid separation and discharge of materials is designed. By violently surging the solid in the leaching grid above the leaching grid, the solid overflows and enters the leaching grid below, and then transports it to the leaching grid above the overflow grid, causing the solvent to overflow. When rotating to the discharge grid, there is very little solid liquid, which simplifies the subsequent solid-liquid separation process and reduces energy consumption.
Through the design of this device, the solid-liquid separation process is significantly shortened, energy consumption is reduced, and the efficiency of solid-liquid separation is improved, avoiding solid-liquid loss and solvent contamination.
Smart Images
Figure CN223009864U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a leaching device, in particular to a leaching device for solid-liquid separation and discharging. Background Art
[0002] In the field of plant fiber processing, as a key device, the leaching device is widely used to extract the active ingredients soluble in a specific solvent from plant fibers. This process not only requires efficient extraction but also pays attention to the recycling of the solvent and the efficiency of solid-liquid separation. In the design of traditional leaching extractors, plant fiber powder is placed in leaching grids, and the solvent is introduced from the top of the leaching grids. After the solvent fully penetrates and dissolves the target components in the fibers, it overflows from the top to the preset oil collecting grids in the lower oil collecting hopper. This process realizes the initial contact and dissolution of the solvent and the active ingredients in the fibers.
[0003] To maximize the utilization rate of the solvent, the solvent in the oil collecting grids is recovered by a specially designed extraction system and pumped back to the bottom of the leaching grids through a circulation pipeline, and then pumped upward from the bottom into the leaching grids for cyclic leaching until the preset leaching efficiency or time period is reached. This circulation mechanism significantly improves the utilization efficiency of the solvent and reduces waste.
[0004] However, in the existing technical practice, especially in the discharging stage after the leaching process, a significant problem emerges: due to a special design often adopted between the oil collecting grids and the upper leaching grids above, that is, a missing false bottom structure is arranged above the oil collecting grids. When the leaching grids complete one rotation along the rotating shaft and reach a specific position, the solid-liquid mixture (i.e., the solvent dissolved with active ingredients and plant fiber residues) will fall into the oil collecting hopper together through this opening. Although this design simplifies the discharging process, the subsequent problem is that a large amount of solvent is often carried on the solid particles, resulting in a complex solid-liquid separation process and high energy consumption. Summary of the Utility Model
[0005] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a leaching device for solid-liquid separation and discharging. By violently tumbling the solids in the corresponding leaching grids above the tumbling grids, the solids overflow from the leaching grids and enter the lower tumbling grids, and then the solids in the tumbling grids are transported to the leaching grids above the overflow grids, so that the height of the solids reaches the upper edge of the overflow grids, forcing the solvent in the leaching grids to overflow. Then, it rotates to the discharging grid, and when falling, the solids carry little liquid, shortening the subsequent solid-liquid separation process and reducing energy consumption.
[0006] The leaching device for solid-liquid separation and discharging described in the utility model includes a leaching vessel. A rotating shaft is provided at the center inside the leaching vessel, and the rotating shaft is connected to a driving device. A number of leaching compartments are separated by a separation plate connecting the rotating shaft and the inner wall of the leaching vessel. A oil collecting hopper is provided at the bottom of the leaching vessel, and the diameter of the oil collecting hopper is larger than that of the upper leaching vessel. A number of dividing plates are provided in the oil collecting hopper from the center to the outer diameter along the rotating direction of the rotating shaft. The dividing plates sequentially separate a feeding compartment, a number of oil collecting compartments, a liquid supplement compartment, a tumbling compartment, an overflow compartment, and a discharging compartment along the rotating direction of the rotating shaft. The height of the dividing plates increases sequentially along the rotating direction of the rotating shaft. A false bottom is provided at the bottom of the leaching compartment, and the false bottom does not rotate with the leaching vessel. The false bottom is not provided at the bottom position of the leaching compartment corresponding to the discharging compartment. One end of a solid transportation device is connected to the bottom of the tumbling compartment, and the other end of the solid transportation device is located above the leaching compartment corresponding to the overflow compartment. A liquid spraying mechanism is provided on the false bottom corresponding to each leaching compartment, and the liquid spraying mechanism is not provided on the false bottom corresponding to the leaching compartment above the overflow compartment. A feeding pipe is provided above the leaching compartment corresponding to the feeding compartment, and a liquid supplement pipe is provided above the leaching compartment corresponding to the liquid supplement compartment.
[0007] Further, the solid transportation device is a scraper conveyor, and a feeding opening is provided at the position directly above the leaching compartment of the scraper conveyor.
[0008] Further, the liquid spraying mechanism includes a liquid inlet pipe connected to the oil collecting hopper. The liquid inlet pipe is connected to a pump, the pump is connected to a liquid outlet pipe, and the liquid outlet pipe is connected to a liquid spraying device and is fixedly connected to the bottom surface of the false bottom. The liquid spraying device is provided with a number of liquid spraying holes facing the leaching compartment.
[0009] The liquid spraying mechanism at the bottom of each leaching compartment corresponding to the false bottom pumps out the solvent that overflows into the lower oil collecting hopper, and then pumps it into the bottom of the leaching compartment to tumble the internal solids, realizing full leaching. By controlling the pump, the height of the solid tumbling is controlled so that it does not exceed the upper edge of the leaching compartment, avoiding the overflow of solid powder into the lower oil collecting hopper and causing solid loss. By controlling the pump of the liquid spraying mechanism corresponding to the tumbling compartment, the solids in the leaching compartment corresponding to the upper part of the tumbling compartment are violently tumbled and overflow from the upper edge of the leaching compartment together with the solvent into the lower tumbling compartment, increasing the solids in the tumbling compartment. The solids in the tumbling compartment are transported to the leaching compartment above the overflow compartment by the solid transportation device. By controlling the transportation speed of the solid transportation device, the height of the solids in the leaching compartment is maintained at the position of the upper edge of the leaching compartment, allowing the solvent to overflow.
[0010] Further, the height of the dividing plates increases sequentially along the rotating direction of the rotating shaft.
[0011] The rotating direction of the leaching compartment of the leaching vessel is opposite to the overflow direction of the solvent in the oil collecting hopper, realizing countercurrent leaching of using saturated solvent to leach the solids just fed in, and using unsaturated solvent to finally leach the solid powder about to complete the leaching step. The efficiency is high and the effect is good.
[0012] Further, a filter screen is provided at the top of the partition board between the surging grid and the oil collecting grid.
[0013] To prevent the solids in the surging grid from overflowing into the adjacent oil collecting grid, a filter screen is set above the partition board, which can prevent the solid powder from continuing to overflow downward and finally being discharged with the solvent, thus keeping the overflowing and circulating solvent clean.
[0014] Further, the discharging grid is connected to a solid discharging and transporting device, and the side wall of the feeding grid is connected to a solvent discharge pipe.
[0015] The solid transporting device and the solid discharging and transporting device are preferably scraper conveyors.
[0016] Working principle: Open the feeding pipe to inject the solid powder to be leached into the corresponding leaching grid above the feeding grid. The rotating shaft drives the leaching device to rotate through the driving device. The leaching grids of the upper leaching device rotate and pass through several oil collecting grids, liquid supplement grids, surging grids, overflow grids, and discharging grids in sequence from the feeding grid. Open the liquid supplement pipe to add solvent to each leaching grid. As the solvent is continuously added and the leaching grid is filled, the solvent overflows downward from the outer edge of the top of the leaching grid into the oil collecting grid of the oil collecting hopper. The solvent in the oil collecting grid is then transported to the spraying device through the liquid inlet pipe, pump, and liquid outlet pipe. The solvent is supplemented upward from the bottom of the leaching grid through the spraying holes on the spraying device, thus causing the solid powder in the leaching grid to surge, realizing the full contact and leaching of the solid powder and the solvent. The solvent in the oil collecting grid overflows downward along the gradually decreasing partition board and finally reaches the feeding grid, where it is transported to the solvent recovery device at a fixed rate through the solvent discharge pipe for recovery. The solvent in the feeding grid has the highest saturation, so that the solid powder newly added can be leached with the solvent with the highest saturation, thus realizing the countercurrent extraction of the solvent; The rate of the spraying mechanism for supplementing solvent upward at the corresponding false bottom position of the surging grid is fast, and the internal surging is more intense, so that the solid and liquid together fall from the upper edge of the leaching grid into the lower surging grid, increasing the solids in the surging grid. The solid powder overflowing from the surging grid is continuously transported upward to the top of the leaching grid above the overflow grid at a certain transportation speed through the solid transporting device, and falls through the feeding port. Control the transportation speed of the solid transporting device so that the height of the solid powder in the corresponding leaching grid above the overflow grid is kept at the upper edge position of the leaching grid, causing the solvent to overflow. After the solvent overflows, the leaching grid continues to rotate to the position above the discharging grid. Due to the absence of the false bottom between the discharging grid and the leaching grid, the solid directly falls into the discharging grid and is transported to the next process section by the solid discharging and transporting device at the bottom.
[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0018] (1) The utility model makes the solid in the soaking grid corresponding to the surging grid above surge violently, so as to overflow from the soaking grid and enter the surging grid below, and then transports the solid in the surging grid to the soaking grid above the overflow grid, making the height of the solid reach the upper edge of the overflow grid, forcing the solvent in the soaking grid to overflow, and then rotating to the discharging grid. When falling, the solid carries very little liquid, shortening the subsequent solid-liquid separation process and reducing energy consumption.
[0019] (2) In order to prevent the solid in the surging grid from overflowing into the adjacent oil collecting grid, a filter screen is arranged above the partition board, which can prevent the solid powder from overflowing downward continuously and finally being discharged with the solvent, thus avoiding losses and keeping the overflowing and circulating solvent clean. Description of the Drawings
[0020] The drawings described herein are used to provide a further understanding of the utility model and form a part of the utility model. In the drawings:
[0021] Figure 1 is a three-dimensional structural schematic diagram of the leaching device for solid-liquid separation and discharging of the utility model;
[0022] Figure 2 is a top view of the leaching device for solid-liquid separation and discharging of the utility model;
[0023] Figure 3 is a three-dimensional structural schematic diagram of the oil collecting hopper of the leaching device for solid-liquid separation and discharging of the utility model;
[0024] Figure 4 is a bottom view of the false bottom of the leaching device for solid-liquid separation and discharging of the utility model;
[0025] In the figure:
[0026] 1. Leaching apparatus; 2. Soaking grid; 3. Separation plate; 4. Surging grid; 5. Overflow grid; 6. Discharge grid; 7. Feed pipe; 8. Supplementary liquid pipe; 9. False bottom; 10. Rotating shaft; 11. Liquid spraying device; 12. Liquid outlet pipe; 13. Pump; 14. Liquid inlet pipe; 15. Solid transportation device; 16. Oil collecting hopper; 17. Oil collecting grid; 18. Partition board; 19. Filter net; 20. Solid discharge transportation device; 21. Solvent discharge pipe; 22. Feed grid; 23. Supplementary liquid grid. Detailed Embodiments
[0027] The following further illustrates the utility model with reference to embodiments, but the protection scope of the utility model is not limited thereto.
[0028] All raw materials used in the embodiments are commercially available unless otherwise specified.
[0029] Embodiment 1
[0030] As shown Figures 1-4 in the figure, the leaching device for solid-liquid separation and discharging includes a leaching tank 1. A rotating shaft 10 is arranged at the center inside the leaching tank 1. The rotating shaft 10 is connected to a driving device. A plurality of leaching compartments 2 are separated by a separation plate 3 connecting the rotating shaft 10 and the inner wall of the leaching tank 1. An oil collecting hopper 16 is arranged at the bottom of the leaching tank 1. The diameter of the oil collecting hopper 16 is larger than that of the upper leaching tank 1. A plurality of dividing plates 18 are arranged from the center to the outer diameter along the inner edge of the oil collecting hopper 16. The dividing plates 18 sequentially separate a feeding compartment 22, two oil collecting compartments 17, a liquid supplement compartment 23, a tumbling compartment 4, an overflow compartment 5, and a discharging compartment 6 along the rotating direction of the rotating shaft 10. The height of the dividing plates 18 increases sequentially along the rotating direction of the rotating shaft 10. A false bottom 9 is arranged at the bottom of the leaching compartment 2. The false bottom 9 does not rotate with the leaching tank 1. The false bottom 9 is not arranged at the bottom position of the leaching compartment 2 corresponding to the discharging compartment 6. One end of a solid transportation device 15 is connected to the bottom of the tumbling compartment 4, and the other end of the solid transportation device 15 is located above the leaching compartment 2 corresponding to the overflow compartment 5. A liquid spraying mechanism is arranged on the false bottom 9 corresponding to each leaching compartment 2, and the liquid spraying mechanism is not arranged on the false bottom 9 corresponding to the leaching compartment 2 above the overflow compartment 5. A feeding pipe 7 is arranged above the leaching compartment 2 corresponding to the feeding compartment 22, and a liquid supplement pipe 8 is arranged above the leaching compartment 2 corresponding to the liquid supplement compartment 23.
[0031] It can be understood that the solid transportation device 15 is a scraper conveyor, and a blanking port is opened at the position above the leaching compartment 2 facing the scraper conveyor.
[0032] It can be understood that the liquid spraying mechanism includes a liquid inlet pipe 14 connected to the oil collecting hopper 16. The liquid inlet pipe 14 is connected to a pump 13. The pump 13 is connected to a liquid outlet pipe 12. The liquid outlet pipe 12 is connected to a liquid spraying device 11, which is fixedly connected to the bottom surface of the false bottom 9. The liquid spraying device 11 is provided with a plurality of liquid spraying holes facing the leaching compartment 2.
[0033] The liquid spraying mechanism at the bottom of each leaching compartment 2 corresponding to the false bottom 9 pumps out the solvent overflowing into the lower oil collecting hopper 16, and then injects it from the bottom of the leaching compartment 2 to tumble the solids inside, achieving sufficient leaching. By controlling the pump 13, the height of the solid tumbling is controlled so that it does not exceed the upper edge of the leaching compartment 2, avoiding the overflow of solid powder into the lower oil collecting hopper 16 and causing solid loss. By controlling the pump 13 of the liquid spraying mechanism corresponding to the tumbling compartment 4, the solids in the leaching compartment 2 corresponding to the upper part of the tumbling compartment 4 are violently tumbled and overflow from the upper edge of the leaching compartment 2 together with the solvent into the lower tumbling compartment 4, increasing the solids in the tumbling compartment 4. The solids in the tumbling compartment 4 are transported to the leaching compartment 2 above the overflow compartment by the solid transportation device 15. By controlling the transportation speed of the solid transportation device 15, the height of the solids in the leaching compartment 2 is maintained at the position of the upper edge of the leaching compartment 2, causing the solvent to overflow.
[0034] It can be understood that the height of the dividing plates 18 increases sequentially along the rotating direction of the rotating shaft 10.
[0035] The rotation direction of the leaching grid 2 of the leaching apparatus 1 is opposite to the solvent overflow direction in the oil collecting hopper 16, realizing the extraction of the just-fed solids with saturated solvent and the extraction of the solid powder that is about to complete the leaching step with unsaturated solvent. The countercurrent leaching has high efficiency and good effect.
[0036] It can be understood that a filter screen 19 is provided at the top of the partition plate 18 between the surging grid 4 and the oil collecting grid 17.
[0037] To prevent the solids in the surging grid 4 from overflowing into the adjacent oil collecting grid 17, a filter screen is provided above the partition plate 18, which can prevent the solid powder from continuing to overflow downward and finally being discharged with the solvent, thus maintaining the cleanliness of the overflowing and circulating solvent.
[0038] It can be understood that the discharge grid 6 is connected to the solid discharge conveying device 20, and the side wall of the feed grid 22 is connected to the solvent discharge pipe 21.
[0039] The solid conveying device 15 and the solid discharge conveying device 20 are scraper conveyors.
[0040] Working principle: Open the feed pipe 7 to inject the solid powder to be leached into the corresponding leaching cell 2 above the feed cell 22. The rotating shaft 10 drives the leaching device 1 to rotate through the driving device. The leaching cells 2 of the upper leaching device 1 rotate and pass through a number of oil collecting cells 17, liquid supplement cells 23, tumbling cells 4, overflow cells 5, and discharging cells 6 in sequence from the feed cell 22. Open the liquid supplement pipe 8 to add solvent into each leaching cell 2. As the solvent is continuously added and the leaching cell 2 is filled, the solvent overflows downward from the outer edge of the top of the leaching cell 2 into the oil collecting cell 17 of the oil collecting hopper 16. The solvent in the oil collecting cell 17 is transported to the liquid spraying device 11 through the liquid inlet pipe 14, pump 13, and liquid outlet pipe 12. The solvent is replenished upward from the bottom of the leaching cell 2 through the liquid spraying holes on the liquid spraying device 11, thus causing the tumbling of the solid powder in the leaching cell 2 and realizing the full contact leaching of the solid powder and the solvent. The solvent in the oil collecting cell 17 overflows downward along the gradually decreasing partition plate 18 and finally reaches the feed cell 22, where it is transported to the solvent recovery device at a fixed rate through the solvent discharge pipe 21 for recovery. The solvent in the feed cell 22 has the highest saturation. In this way, the solid powder newly added can be leached with the solvent with the highest saturation, thus realizing the countercurrent extraction of the solvent. The rate of the solvent replenished upward by the liquid spraying mechanism at the position of the false bottom 9 corresponding to the tumbling cell 4 is fast, and the internal tumbling is more intense, causing the solid and liquid to fall from the upper edge of the leaching cell 2 into the lower tumbling cell 4 together, increasing the solid in the tumbling cell 4. The solid powder overflowing from the tumbling cell 4 is continuously transported upward to the top of the leaching cell 2 above the overflow cell 5 at a certain transportation speed through the solid transportation device 15 and falls through the feeding port. Control the transportation speed of the solid transportation device 15 so that the height of the solid powder in the corresponding leaching cell 2 above the overflow cell 5 is maintained at the upper edge position of the leaching cell 2, causing the solvent to overflow. After the solvent overflows, the leaching cell 2 continues to rotate above the discharging cell. Due to the absence of the false bottom 9 between the discharging cell and the leaching cell 2, the solid directly falls into the discharging cell and is transported to the next process section by the solid discharging transportation device 20 at the bottom.
Claims
1. A leaching device for solid-liquid separation and discharge, characterized in that: The invention comprises an extractor (1), wherein a rotating shaft (10) is provided at the center of the extractor (1), the rotating shaft (10) is connected to a driving device, and a plurality of extraction grids (2) are divided by a separation plate (3) connected to the rotating shaft (10) and the inner wall of the extractor (1), wherein an oil collecting hopper (16) is provided at the bottom of the extractor (1), the diameter of the oil collecting hopper (16) is larger than that of the extractor (1) above, and a plurality of dividing plates (18) are provided inside the oil collecting hopper (16) along the center to the outer diameter, and the dividing plates (18) are sequentially divided into a feed grid (22), a plurality of oil collecting grids (17), a liquid replenishing grid (23), a surging grid (4), an overflow grid (5), and a discharge grid (6) along the rotation direction of the rotating shaft (10), and the height of the dividing plates (18) is sequentially increased along the rotation direction of the rotating shaft (10). The leaching grid (2) is increased in height, a false bottom (9) is provided at the bottom of the leaching grid (2), the false bottom (9) does not rotate with the leacher (1), no false bottom (9) is provided at the bottom of the leaching grid (2) corresponding to the discharge grid (6), the bottom of the tumbling grid (4) is connected to one end of a solid transport device (15), the other end of the solid transport device (15) is located above the leaching grid (2) corresponding to the overflow grid (5), a liquid spraying mechanism is provided on the false bottom (9) corresponding to each leaching grid (2), no liquid spraying mechanism is provided on the false bottom (9) corresponding to the leaching grid (2) above the overflow grid (5), a feed pipe (7) is provided above the leaching grid (2) corresponding to the feed grid (22), and a liquid replenishing pipe (8) is provided above the leaching grid (2) corresponding to the liquid replenishing grid (23).
2. The leaching device for solid-liquid separation and discharge according to claim 1, characterized in that: The solid transport device (15) is a scraper conveyor, and the scraper conveyor is provided with a discharge port at a position directly above the leaching grid (2).
3. The leaching device for solid-liquid separation and discharge according to claim 1, characterized in that: The liquid spraying mechanism comprises a liquid inlet pipe (14) connected to the oil collecting hopper (16), the liquid inlet pipe (14) is connected to a pump (13), the pump (13) is connected to a liquid outlet pipe (12), the liquid outlet pipe (12) is connected to a liquid spraying device (11), and is fixedly connected to the bottom surface of the false bottom (9), and the liquid spraying device (11) is provided with a plurality of liquid spraying holes in the direction of the leaching grid (2).
4. The leaching device for solid-liquid separation and discharge according to claim 1, characterized in that: The height of the grid plates (18) increases sequentially along the rotation direction of the rotation axis (10).
5. The leaching device for solid-liquid separation and discharge according to claim 4, characterized in that: A filter screen (19) is provided on the top of the partition plate (18) between the turbulence grid (4) and the oil collection grid (17).
6. The leaching device for solid-liquid separation and discharge according to claim 1, characterized in that: The discharge grid (6) is connected to a solid discharge transport device (20), and the side wall of the feed grid (22) is connected to a solvent discharge pipe (21).