A solid-liquid separation device suitable for refining 3,4-difluorobenzonitrile

Abstract

The utility model relates to solid -liquid separation technical field discloses a solid -liquid separation device suitable for 3, 4 -difluorobenzonitrile refining, including fixed bolster, the fixed bolster one side fixedly connected with the feeding hopper, the feeding hopper bottom fixedly connected with the workbench, the workbench side wall fixedly connected with liquid collector, the workbench one side fixedly connected with the support station, the workbench inside is provided with filter screen no.

Description

Technical Field

[0001] This utility model relates to the field of solid-liquid separation technology, and in particular to a solid-liquid separation device suitable for the purification of 3,4-difluorobenzonitrile. Background Technology

[0002] In the refining process of 3,4-difluorobenzonitrile, solid-liquid separation is a crucial step in ensuring product purity and quality. During synthesis and purification, 3,4-difluorobenzonitrile is often accompanied by catalyst residues, unreacted solid raw material particles, and insoluble impurities generated from side reactions. If these impurities are not effectively removed, they will not only reduce product purity and affect the selectivity and efficiency of downstream chemical reactions, but also lead to problems such as blockage of subsequent distillation columns and scaling of pipelines, increasing equipment maintenance costs and production energy consumption. Therefore, a highly efficient solid-liquid separation device is an indispensable core piece of equipment in this refining process. By accurately separating solid impurities from liquid 3,4-difluorobenzonitrile, the purity level of the product can be significantly improved, the interference of impurities on subsequent purification processes can be reduced, the continuity and stability of production can be ensured, and the risk of product scrap due to excessive impurities can be reduced, thereby improving overall production efficiency and product market competitiveness.

[0003] In the existing technology, solid-liquid separation devices used for refining similar fine chemical products are mostly based on pressure difference or gravity to achieve solid-liquid separation. That is, the material is pressurized by the pump and enters the separation chamber from the feed port. When it flows through the filter element, the liquid component passes through the filter medium into the filtrate collection area and is discharged from the filtrate outlet, while the solid impurities are trapped on the surface or inside of the filter element.

[0004] However, in existing solid-liquid separation devices, the filter elements are often fixedly installed, forming a relatively tight connection with the device body. This design makes it difficult to thoroughly disassemble, clean, or replace the filter elements once solid impurities accumulate on their surface. When impurities clog the filter pores, it not only significantly reduces filtration efficiency and increases material flow resistance, but also leads to impurities mixing into the filtrate and affecting product purity if cleaning is not timely. Furthermore, frequent shutdowns for cleaning severely impact production continuity and increase labor and time maintenance costs. Therefore, a solid-liquid separation device suitable for the purification of 3,4-difluorobenzonitrile is proposed to address these problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a solid-liquid separation device suitable for the purification of 3,4-difluorobenzonitrile, aiming to improve the problem of the filter screen being difficult to clean in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A solid-liquid separation device suitable for the refining of 3,4-difluorobenzonitrile includes a fixed support, a feed hopper fixedly connected to one side of the fixed support, a worktable fixedly connected to the bottom of the feed hopper, a liquid collector fixedly connected to the side wall of the worktable, a support platform fixedly connected to one side of the worktable, a filter screen first disposed inside the worktable, a handle fixedly connected to the outer wall of the filter screen first, and buckles fixedly connected to both outer walls of the filter screen first, the buckles being slidably connected inside the worktable, and a locking block assembly disposed on the side wall of the worktable;

[0008] The locking assembly includes a protective sleeve, the outer wall of which is fixedly connected to the side wall of the workbench. A telescopic spring is provided inside the protective sleeve. A bottom cover is fixedly connected to the top of the protective sleeve. An iron ball is slidably connected inside the protective sleeve. The two ends of the telescopic spring are respectively fixedly connected to the bottom cover and the iron ball. The iron ball engages with the buckle.

[0009] As a further description of the above technical solution:

[0010] A support platform is fixedly connected to one side of the workbench, and a drive assembly is provided on the top of the support platform.

[0011] As a further description of the above technical solution:

[0012] The drive assembly includes an electric push rod, the bottom of which is fixedly connected to the top of the support platform. The electric push rod passes through the inside of the worktable. The output end of the electric push rod is fixedly connected to a telescopic rod, and one end of the telescopic rod is fixedly connected to a drive shaft.

[0013] As a further description of the above technical solution:

[0014] An extrusion box is fixedly connected to one side of the workbench. A collector is provided at the bottom of the extrusion box. A support base is provided at the bottom of the extrusion box. An electric push rod is fixedly connected to the top of the support base. The output end of the electric push rod is connected to a telescopic rod.

[0015] As a further description of the above technical solution:

[0016] Below the filter screen is a movable component, which includes a telescopic rod and a water tank. The water tank is fixedly connected to one side of the telescopic rod, and a connecting rod is fixedly connected to the top of the water tank.

[0017] As a further description of the above technical solution:

[0018] A pressing block is fixedly connected to one side of the drive shaft, and the pressing block is in contact with the surface of the worktable.

[0019] As a further description of the above technical solution:

[0020] The second telescopic rod is located at the bottom of the first filter screen, and one side of the water tank is fixedly connected to one end of the second telescopic rod.

[0021] As a further description of the above technical solution:

[0022] A pressing block is fixedly connected to one side of the drive shaft, and the pressing block is in contact with the surface of the worktable.

[0023] As a further description of the above technical solution:

[0024] The water tank has a water inlet on one side, and multiple nozzles are fixedly connected to the bottom of the water tank. A brush head is also fixedly connected to the bottom of the water tank. A filter screen is located below the brush head, and a liquid collector is located at the bottom of the filter screen.

[0025] This utility model has the following beneficial effects:

[0026] 1. In this utility model, the filter screen structure is driven to work through the detachable structure. The material is put in through the inlet and guided into the worktable. Solids fall onto the detachable filter screen one, and liquids permeate downwards through the detachable filter screen one. Because the filter screen one adopts a quick-release connection design, when the filter screen one accumulates, it can be easily and quickly disassembled manually by pulling the handle. This solves the problem that when the filter screen is clogged and needs to be replaced, it is impossible to quickly disassemble the filter screen, which leads to a reduction in the filter screen filtration effect. This improves the convenience of the solid-liquid separation device.

[0027] 2. In this utility model, with the cooperation of the electric push rod 2 and the water tank structure, when the filter screen 2 accumulates material and needs cleaning, cleaning agent or water is poured into the water inlet on one side of the water tank. This enables the electric push rod 2 to provide power and drive the telescopic rod 2 to reciprocate. The telescopic rod 2 drives the water tank to move. Because the water tank is equipped with a spray head and a brush head, it solves the problems of inconvenient cleaning and easy accumulation of traditional filter screens, which affect production, and improves the practicality of the solid-liquid separation device. Attached Figure Description

[0028] Figure 1 This is a three-dimensional schematic diagram of a solid-liquid separation device suitable for the purification of 3,4-difluorobenzonitrile according to the present invention.

[0029] Figure 2 This is a schematic cross-sectional view of the workbench of a solid-liquid separation device suitable for the refining of 3,4-difluorobenzonitrile proposed in this utility model.

[0030] Figure 3 This is a schematic diagram of the structure of a snap-fit ​​device for solid-liquid separation in the refining of 3,4-difluorobenzonitrile proposed in this utility model.

[0031] Figure 4This is a schematic diagram of the structure of the side wall of the support base of a solid-liquid separation device suitable for the refining of 3,4-difluorobenzonitrile proposed in this utility model.

[0032] Figure 5 This is a schematic diagram of the water tank in a solid-liquid separation device for the refining of 3,4-difluorobenzonitrile, as proposed in this utility model.

[0033] Legend:

[0034] 1. Feed hopper; 2. Fixed support; 3. Workbench; 4. Support platform; 5. Electric push rod one; 6. Extrusion box; 7. Collector; 8. Telescopic rod one; 9. Drive shaft; 10. Extrusion block; 11. Protective sleeve; 12. Buckle; 13. Support base; 14. Electric push rod two; 15. Filter screen one; 16. Bottom cover; 17. Filter screen two; 18. Liquid collector; 19. Telescopic spring; 20. Brush head; 21. Iron ball; 22. Telescopic rod two; 23. Connecting rod; 24. Water inlet; 25. Nozzle; 26. Handle; 27. Water tank. Detailed Implementation

[0035] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] Reference Figures 1-2 An embodiment of this utility model is provided: a solid-liquid separation device suitable for the refining of 3,4-difluorobenzonitrile. A feed hopper 1 is fixedly connected to one side of a fixed support 2. A workbench 3 is fixedly connected to the bottom of the feed hopper 1. A liquid collector 18 is fixedly connected to the side wall of the workbench 3. A support platform 4 is fixedly connected to one side of the workbench 3. A filter screen 15 is provided inside the workbench 3. A handle 26 is fixedly connected to the outer wall of the filter screen 15. Buckles 12 are fixedly connected to both outer walls of the filter screen 15. The buckles 12 are slidably connected inside the workbench 3. A locking block assembly is provided on the side wall of the workbench 3.

[0037] The locking assembly includes a protective sleeve 11, the outer wall of which is fixedly connected to the side wall of the workbench 3. A telescopic spring 19 is installed inside the protective sleeve 11. A bottom cover 16 is fixedly connected to the top of the protective sleeve 11. An iron ball 21 is slidably connected inside the protective sleeve 11. Both ends of the telescopic spring 19 are fixedly connected to the bottom cover 16 and the iron ball 21, respectively. The iron ball 21 engages with a buckle 12. A support platform 4 is fixedly connected to one side of the workbench 3. A drive assembly is installed on the top of the support platform 4. The drive assembly includes an electric push rod 5, the bottom of which is fixedly connected to the top of the support platform 4. The electric push rod 5 passes through the workbench 3. A telescopic rod 8 is fixedly connected to the output end of the electric push rod 5. A drive shaft 9 is fixedly connected to one end of the telescopic rod 8. The pore size of the filter screen 15 effectively traps solid impurities while ensuring smooth liquid passage. The detachable design, combined with the quick-connect structure of the buckle 12 and the locking assembly, allows operators to replace filter screens with different pore sizes according to the material characteristics, improving the versatility of the device.

[0038] Reference Figures 1-5 A squeezing box 6 is fixedly connected to one side of the workbench 3. A collector 7 is set at the bottom of the squeezing box 6. A support base 13 is set at the bottom of the squeezing box 6. An electric push rod 14 is fixedly connected to the top of the support base 13. The output end of the electric push rod 14 is connected to the telescopic rod 22. There is a moving component below the filter screen 15. The moving component includes the telescopic rod 22 and a water tank 27. The water tank 27 is fixedly connected to one side of the telescopic rod 22. A connecting rod 23 is fixedly connected to the top of the water tank 27. The telescopic rod 22 is set at the bottom of the filter screen 15. One side of the water tank 27 is fixedly connected to one end of the telescopic rod 22. A water inlet 24 is opened on one side of the water tank 27. Multiple nozzles 25 are fixedly connected to the bottom of the water tank 27. A brush head 20 is fixedly connected to the bottom of the water tank 27. The filter screen 17 is located below the brush head 20. A liquid collector 18 is set at the bottom of the filter screen 17. The moving components clean and perform secondary filtration on filter screen two, effectively preventing filter screen clogging, improving the continuous working capacity and material recovery rate of the unit, and further enhancing the practicality and economy of the unit in the refining process of 3,4-difluorobenzonitrile.

[0039] Working principle: The solid-liquid mixture of 3,4-difluorobenzonitrile to be processed is guided into the workbench 3 through the feed hopper 1. The mixture falls onto the detachable filter screen 15. The liquid continues to seep down through the filter screen 15 and is collected by the filter screen 17 below. The solid is trapped by the filter screen. The electric push rod 15 pushes the telescopic rod 8, which drives the transmission shaft 9 to push the extrusion block 10 to extrude in the extrusion box 6. The extruded solid falls into the collector 7 through the lower opening of the extrusion box 6, achieving preliminary solid-liquid separation. The separated liquid continues to seep down through the filter screen 17 for secondary filtration. The separated liquid enters the liquid collector 18. When the filter screen 15 needs to be cleaned, the handle 26 is pulled to remove the filter screen 15, causing the buckle 12 to separate from the telescopic spring 19 and iron ball 21 inside the protective sleeve 11. After the filter screen 15 is cleaned, the handle 26 is pushed to lock the telescopic spring 19 and iron ball 21 inside the protective sleeve 11 into the buckle 12.

[0040] When filter screen 217 needs cleaning, the electric push rod 214 pushes the telescopic rod 22, which in turn drives the water tank 27, connecting rod 23, brush head 20, and spray nozzle 25 to move left and right in a regular motion. Cleaning solution or water is injected into the water tank 27 through the water inlet 24, washing away solid residues on filter screen 217, facilitating subsequent processing, ensuring the cleanliness of filter screen 217, maintaining the separation efficiency of the equipment, and eliminating the need for manual cleaning of the filter screen. The equipment's built-in cleaning system automatically starts cleaning as needed, using cleaning solution or water to rinse filter screen 217, promptly removing solid impurities trapped on filter screen 217, ensuring filter screen permeability, continuously and stably achieving solid-liquid separation effect, and improving the automation level and operating efficiency of the equipment.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A solid-liquid separation device suitable for the purification of 3,4-difluorobenzonitrile, comprising a fixed support (2), characterized in that: A feed hopper (1) is fixedly connected to one side of the fixed support (2), a workbench (3) is fixedly connected to the bottom of the feed hopper (1), a liquid collector (18) is fixedly connected to the side wall of the workbench (3), a support platform (4) is fixedly connected to one side of the workbench (3), a filter screen (15) is provided inside the workbench (3), a handle (26) is fixedly connected to the outer wall of the filter screen (15), buckles (12) are fixedly connected to both outer walls of the filter screen (15), the buckles (12) are slidably connected inside the workbench (3), and a locking block assembly is provided on the side wall of the workbench (3). The locking assembly includes a protective sleeve (11), the outer wall of which is fixedly connected to the side wall of the workbench (3). A telescopic spring (19) is provided inside the protective sleeve (11). A bottom cover (16) is fixedly connected to the top of the protective sleeve (11). An iron ball (21) is slidably connected inside the protective sleeve (11). The two ends of the telescopic spring (19) are fixedly connected to the bottom cover (16) and the iron ball (21) respectively. The iron ball (21) engages with the buckle (12).

2. The solid-liquid separation device for the purification of 3,4-difluorobenzonitrile according to claim 1, characterized in that: A support platform (4) is fixedly connected to one side of the workbench (3), and a drive assembly is provided on the top of the support platform (4).

3. A solid-liquid separation device suitable for the purification of 3,4-difluorobenzonitrile according to claim 2, characterized in that: The drive assembly includes an electric push rod (5), the bottom of which is fixedly connected to the top of the support platform (4), the electric push rod (5) passes through the inside of the workbench (3), the output end of the electric push rod (5) is fixedly connected to a telescopic rod (8), and one end of the telescopic rod (8) is fixedly connected to a drive shaft (9).

4. A solid-liquid separation device for the purification of 3,4-difluorobenzonitrile according to claim 3, characterized in that: A compression box (6) is fixedly connected to one side of the workbench (3). A collector (7) is provided at the bottom of the compression box (6). A support base (13) is provided at the bottom of the compression box (6). An electric push rod (14) is fixedly connected to the top of the support base (13). The output end of the electric push rod (14) is connected to the telescopic rod (22).

5. A solid-liquid separation device for the purification of 3,4-difluorobenzonitrile according to claim 1, characterized in that: Below the filter screen (15) is a movable component, which includes a telescopic rod (22) and a water tank (27). The water tank (27) is fixedly connected to one side of the telescopic rod (22), and a connecting rod (23) is fixedly connected to the top of the water tank (27).

6. A solid-liquid separation apparatus for the purification of 3,4-difluorobenzonitrile according to claim 5, characterized in that: The second telescopic rod (22) is set at the bottom of the first filter screen (15), and the water tank (27) is fixedly connected to one end of the second telescopic rod (22).

7. A solid-liquid separation device for the purification of 3,4-difluorobenzonitrile according to claim 3, characterized in that: A pressing block (10) is fixedly connected to one side of the drive shaft (9), and the pressing block (10) is in contact with the surface of the worktable (3).

8. A solid-liquid separation apparatus for the purification of 3,4-difluorobenzonitrile according to claim 5, characterized in that: The water tank (27) has a water inlet (24) on one side. Multiple nozzles (25) are fixedly connected to the bottom of the water tank (27). A brush head (20) is fixedly connected to the bottom of the water tank (27). A filter screen (17) is located at the bottom of the brush head (20). A liquid collector (18) is located at the bottom of the filter screen (17).

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