Impurity removing and refining device for salicylic acid production

Abstract

The utility model provides an impurity removal refining device for salicylic acid production, which relates to the technical field of chemical production equipment and comprises a support frame, a dissolving tank and a filter box, a feed pipe is fixedly mounted on the upper surface of the dissolving tank, and heating plates are symmetrically arranged in the dissolving tank. The stirring rod I and the two groups of stirring rods II which are transversely distributed are arranged in the dissolving tank, so that the double stirring effect on a crude salicylic acid solution is realized, the stirring uniformity and the heat conduction efficiency are improved, the dissolving speed is accelerated, the phenomenon of material caking or local overheating is avoided, the subsequent impurity removal efficiency is improved, and the production cost is reduced. A cleaning brush assembly driven by hydraulic cylinders is arranged in the filtering box, the two hydraulic cylinders push cleaning brushes to be attached to the side face of the filtering plate for brushing, it is ensured that the filtering plate is clean, and the filtering effect is maintained; and a motor II in the discharging pipe drives a rotating rod to rotate to drive a semi-arc-shaped scraping plate to scrape residual materials on the inner wall of the discharging pipe, so that blockage is avoided.

Description

Technical Field

[0001] This utility model relates to the field of chemical production equipment technology, and in particular to a purification and refining device for salicylic acid production. Background Technology

[0002] With the rapid development of the chemical industry, salicylic acid, as a key raw material for the preparation of drugs such as aspirin, synthetic fragrances and dyes, has seen continuous growth in market demand, and the requirements for product purity and production efficiency are also increasing. In the production process of salicylic acid, crude products usually contain impurities such as unreacted raw materials, by-products and catalyst residues, which can significantly affect the application performance of salicylic acid and the quality of subsequent processing.

[0003] In the existing technology, traditional salicylic acid purification equipment has some problems. Some devices generally adopt a single axial stirring structure, which leads to uneven material mixing and insufficient impurity removal reaction, affecting product purity. At the same time, in terms of filtration, traditional filter components lack automatic cleaning function, and the filter plates are easily blocked by impurities, requiring frequent shutdowns for disassembly and cleaning, which seriously reduces production efficiency. In addition, material residues are easily left on the inner wall of the discharge pipe, which may lead to pipe blockage in the long term and increase equipment maintenance costs. Utility Model Content

[0004] The purpose of this invention is to solve the problems in the existing technology where some devices generally adopt a single axial stirring structure, resulting in uneven material mixing, insufficient impurity removal reaction, lack of automatic cleaning function of traditional filter components, and material residue in the discharge. Therefore, this invention proposes an impurity removal and refining device for salicylic acid production.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a purification device for salicylic acid production, comprising a support frame, a dissolving tank, and a filter box. A feed pipe is fixedly installed on the upper surface of the dissolving tank. Heating plates are symmetrically arranged inside the dissolving tank. A stirring rod is rotatably connected inside the dissolving tank. A motor is fixedly installed on the upper surface of the dissolving tank. An installation box is fixedly installed inside the dissolving tank. A stirring rod is rotatably connected inside the installation box. A bevel gear is fixedly installed at one end of the stirring rod, and a bevel gear is fixedly installed at one end of the stirring rod. A connecting pipe is provided at the lower end of the dissolving tank. A water pump is fixedly installed on the lower surface of the support frame. A conveying pipe is fixedly connected to the output end of the water pump. A filter plate is provided inside the filter box. A cleaning brush is provided inside the filter box. A hydraulic cylinder is fixedly installed on the surface of the filter box. A discharge pipe is fixedly installed on the lower surface of the filter box. A rotating rod is rotatably connected inside the discharge pipe. A scraper is fixedly installed on the surface of the rotating rod. A motor is fixedly installed on the side of the discharge pipe.

[0006] Preferably, the output end of the motor is fixedly connected to one end of the stirring rod, and the bevel gear one and the bevel gear two mesh and drive each other.

[0007] Preferably, the stirring rods are laterally distributed inside the dissolving tank, and there are two sets of stirring rods and bevel gears.

[0008] Preferably, one end of the connecting pipe is connected to the interior of the dissolving tank, and one end of the conveying pipe is connected to the interior of the filter box.

[0009] Preferably, the output end of the hydraulic cylinder is fixedly connected to the surface of the cleaning brush.

[0010] Preferably, there are two sets of cleaning brushes and hydraulic cylinders, and the cleaning surface of the cleaning brush is in contact with the side of the filter plate.

[0011] Preferably, the output end of the second motor is fixedly connected to one end of the rotating rod.

[0012] Preferably, the scraper is semi-circular in shape, and the scraping surface of the scraper is in contact with the inner wall of the discharge pipe.

[0013] Preferably, the side of the filter plate is fixedly connected with a protrusion, the surface of the filter box is provided with a groove, the side of the filter box is threaded with a hexagonal bolt, and the side of the protrusion is provided with a screw hole.

[0014] Preferably, the protrusion and the groove are slidably connected, and the hexagonal bolt and the screw hole are threadedly connected.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0016] 1. In this utility model, by setting a stirring rod one and two sets of horizontally distributed stirring rods two inside the dissolving tank, a dual stirring effect is achieved on the crude salicylic acid solution, thereby improving the stirring uniformity and heat transfer efficiency, accelerating the dissolution speed, avoiding material agglomeration or local overheating, and improving the subsequent impurity removal efficiency. In addition, a cleaning brush assembly driven by a hydraulic cylinder is set inside the filter box. The two sets of hydraulic cylinders push the cleaning brush to brush against the side of the filter plate to ensure the filter plate is clean and maintain the filtration effect. The motor two inside the discharge pipe drives the rotating rod to rotate, which drives the semi-circular scraper to scrape off the residual material on the inner wall of the discharge pipe to avoid blockage.

[0017] 2. In this utility model, the filter plate is slidably engaged by protrusions and grooves and fixed by hexagonal bolts, which facilitates disassembly and replacement, ensures continuous and stable operation of the device, and improves the continuity of salicylic acid purification and product quality. Attached Figure Description

[0018] Figure 1This utility model provides a three-dimensional structural schematic diagram of a purification and impurity removal device for salicylic acid production;

[0019] Figure 2 This utility model provides a cross-sectional view of the dissolving tank of a purification and refining device for salicylic acid production;

[0020] Figure 3 This utility model provides a cross-sectional view of the filter box of a purification and refining device for salicylic acid production;

[0021] Figure 4 This utility model provides an exploded view of the motor, rotating rod, and scraper of a purification device for salicylic acid production.

[0022] Figure 5 This utility model presents a partial structural diagram of the filter box and filter plate of a purification device for salicylic acid production.

[0023] Legend: 1. Support frame; 2. Dissolving tank; 3. Filter box; 4. Feed pipe; 5. Heating plate; 6. Stirring rod one; 7. Motor one; 8. Mounting box; 9. Stirring rod two; 10. Bevel gear one; 11. Bevel gear two; 12. Connecting pipe; 13. Water pump; 14. Conveying pipe; 15. Filter plate; 16. Cleaning brush; 17. Hydraulic cylinder; 18. Discharge pipe; 19. Rotating rod; 20. Scraper; 21. Motor two; 22. Protrusion; 23. Groove; 24. Hex bolt; 25. Screw hole. Detailed Implementation

[0024] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0026] Example 1: As Figures 1-5As shown, this utility model provides a technical solution: a purification device for salicylic acid production, including a support frame 1, a dissolving tank 2, and a filter box 3. A feed pipe 4 is fixedly installed on the upper surface of the dissolving tank 2. Heating plates 5 are symmetrically arranged inside the dissolving tank 2. A stirring rod 6 is rotatably connected inside the dissolving tank 2. A motor 7 is fixedly installed on the upper surface of the dissolving tank 2. An installation box 8 is fixedly installed inside the dissolving tank 2. A second stirring rod 9 is rotatably connected inside the installation box 8. A bevel gear 10 is fixedly installed at one end of the first stirring rod 6, and a bevel gear 11 is fixedly installed at one end of the second stirring rod 9. A connecting pipe 12 is provided at the lower end of the dissolving tank 2. A water pump 13 is fixedly installed on the lower surface of the support frame 1. A conveying pipe 14 is fixedly connected to the output end of the water pump 13. A filter plate 15 is provided inside the filter box 3. A cleaning brush 16 is provided inside the filter box 3. A hydraulic cylinder 17 is fixedly installed on the surface of the filter box 3. A discharge pipe 18 is fixedly installed on the lower surface. A rotating rod 19 is rotatably connected inside the discharge pipe 18. A scraper 20 is fixedly installed on the surface of the rotating rod 19. A motor 21 is fixedly installed on the side of the discharge pipe 18. The output end of the motor 7 is fixedly connected to one end of the stirring rod 6. The bevel gear 10 and the bevel gear 21 mesh and drive each other. The stirring rod 9 is laterally distributed inside the dissolving tank 2. There are two sets of stirring rod 9 and bevel gear 21. One end of the connecting pipe 12 is connected to the inside of the dissolving tank 2. One end of the conveying pipe 14 is connected to the inside of the filter box 3. The output end of the hydraulic cylinder 17 is fixedly connected to the surface of the cleaning brush 16. There are two sets of cleaning brush 16 and hydraulic cylinder 17. The cleaning surface of the cleaning brush 16 is in contact with the side of the filter plate 15. The output end of the motor 21 is fixedly connected to one end of the rotating rod 19. The scraper 20 is semi-circular. The scraping surface of the scraper 20 is in contact with the inner wall of the discharge pipe 18.

[0027] In this embodiment, during use, crude salicylic acid and solvent are added to the dissolving tank 2 through the feed pipe 4. The motor 7 is started, and the motor 7 drives the stirring rod 6 to rotate. The stirring rod 6 is driven by the meshing of bevel gear 10 and bevel gear 11, which drives two sets of horizontally distributed stirring rods 9 to rotate synchronously. The stirring rod 6 generates a vertical stirring force, while the stirring rod 9 generates a horizontal stirring force. The two work together to ensure that the crude salicylic acid and solvent are fully mixed in the dissolving tank 2. At the same time, the symmetrically arranged heating plates 5 heat the material to accelerate the dissolution and impurity removal reaction. After the reaction, the material enters the filter box 3 through the connecting pipe 12 and the water pump 13 through the conveying pipe 14. The filter plate 15 filters the material. When impurities adhere to the surface of the filter plate 15 and affect the filtration effect, the hydraulic cylinder 17 is started. The two sets of hydraulic cylinders 17 push the cleaning brush 16 to move along the side of the filter plate 15 to remove the impurities and ensure the permeability of the filter plate 15. The filtered material is discharged from the discharge pipe 18. During the discharge process, the second motor 21 is started, which drives the rotating rod 19 to rotate. The semi-circular scraper 20 on the rotating rod 19 rotates accordingly, scraping off the material remaining on the inner wall of the discharge pipe 18 to prevent material residue from clogging the pipe and to ensure the continuous and stable operation of the device.

[0028] Example 2: As Figures 1-5 As shown, a protrusion 22 is fixedly connected to the side of the filter plate 15, a groove 23 is provided on the surface of the filter box 3, a hexagonal bolt 24 is threadedly connected to the side of the filter box 3, a screw hole 25 is provided on the side of the protrusion 22, the protrusion 22 and the groove 23 are slidably connected, and the hexagonal bolt 24 and the screw hole 25 are threadedly connected.

[0029] In this embodiment, when the filter plate 15 has been used for a long time and is severely worn or clogged, and needs to be replaced, unscrew the hex bolts 24 on the side of the filter box 3. Since the protrusion 22 and the groove 23 are slidably connected, the filter plate 15 can be easily pulled out along the groove 23. Take out the old filter plate 15, align the protrusion 22 on the side of the new filter plate 15 with the groove 23 of the filter box 3 and insert it, so that the screw hole 25 on the protrusion 22 is aligned with the screw hole 25 on the side of the filter box 3. Then tighten the hex bolts 24 to fix it. This detachable installation method facilitates quick replacement of the filter plate 15 and makes the maintenance and upkeep of the equipment convenient.

[0030] The working principle of this embodiment is as follows: When using the salicylic acid production purification device, crude salicylic acid and solvent are first added to the dissolving tank 2 through the feed pipe 4. Then, motor 7 is started, causing its output end to drive stirring rod 6 to rotate. At the same time, bevel gear 10 on stirring rod 6 meshes with bevel gear 11 at the end of stirring rod 9, thereby driving the two sets of horizontally distributed stirring rods 9 to rotate synchronously. Stirring rod 6 generates vertical stirring force, while stirring rod 9 generates horizontal stirring force, forming a multi-directional stirring effect in the dissolving tank 2. Simultaneously, the symmetrically arranged heating plates 5 start working to heat the material, accelerating the dissolution and purification reaction process of crude salicylic acid. After the reaction is completed, the valve of connecting pipe 12 is opened, and the water pump 13 on the lower surface of the support frame 1 is started. The water pump 13 pumps the material in the dissolving tank 2 through the connecting pipe 12 and the conveying pipe 14 to... Inside the filter box 3, the material is filtered by the filter plate 15. When the pressure difference across the filter plate 15 increases and cleaning is required, the two sets of hydraulic cylinders 17 on the surface of the filter box 3 are activated. The hydraulic cylinders 17 push the cleaning brush 16 to move back and forth along the side of the filter plate 15 to remove impurities from the surface of the filter plate 15. The filtered material is discharged through the discharge pipe 18. During the discharge process, the second motor 21 is activated, which drives the rotating rod 19 to rotate. The semi-circular scraper 20 on the rotating rod 19 rotates accordingly to scrape off the residual material on the inner wall of the discharge pipe 18 to prevent blockage. When the filter plate 15 needs to be replaced, the hexagonal bolts 24 on the side of the filter box 3 are unscrewed, and the filter plate 15 is pulled out along the direction of the groove 23. After replacing it with a new filter plate 15, the screw holes 25 on the protrusion 22 are aligned with the screw holes 25 on the side of the filter box 3, and the hexagonal bolts 24 are tightened to fix it, ensuring the continuous and stable operation of the device.

[0031] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A purification apparatus for salicylic acid production, comprising a support frame (1), a dissolving tank (2), and a filter box (3), characterized in that: A feed pipe (4) is fixedly installed on the upper surface of the dissolving tank (2). Heating plates (5) are symmetrically arranged inside the dissolving tank (2). A stirring rod (6) is rotatably connected inside the dissolving tank (2). A motor (7) is fixedly installed on the upper surface of the dissolving tank (2). An installation box (8) is fixedly installed inside the dissolving tank (2). A stirring rod (9) is rotatably connected inside the installation box (8). A bevel gear (10) is fixedly installed at one end of the stirring rod (6). A bevel gear (11) is fixedly installed at one end of the stirring rod (9). A connecting pipe (12) is provided at the lower end of the dissolving tank (2). A water pump (13) is fixedly installed on the lower surface of the support frame (1). A conveying pipe (14) is fixedly connected to the output end of the water pump (13). A filter plate (15) is provided inside the filter box (3). A cleaning brush (16) is provided inside the filter box (3). A hydraulic cylinder (17) is fixedly installed on the surface of the filter box (3). A discharge pipe (18) is fixedly installed on the lower surface of the filter box (3). A rotating rod (19) is rotatably connected inside the discharge pipe (18). A scraper (20) is fixedly installed on the surface of the rotating rod (19). A motor (21) is fixedly installed on the side of the discharge pipe (18).

2. The purification apparatus for salicylic acid production according to claim 1, characterized in that: The output end of the motor (7) is fixedly connected to one end of the stirring rod (6), and the bevel gear (10) meshes with the bevel gear (11).

3. The purification apparatus for salicylic acid production according to claim 1, characterized in that: The stirring rods (9) are laterally distributed inside the dissolving tank (2), and there are two sets of stirring rods (9) and bevel gears (11).

4. The purification apparatus for salicylic acid production according to claim 1, characterized in that: One end of the connecting pipe (12) is connected to the inside of the dissolving tank (2), and one end of the conveying pipe (14) is connected to the inside of the filter box (3).

5. The purification apparatus for salicylic acid production according to claim 1, characterized in that: The output end of the hydraulic cylinder (17) is fixedly connected to the surface of the cleaning brush (16).

6. The purification apparatus for salicylic acid production according to claim 1, characterized in that: The number of cleaning brushes (16) and hydraulic cylinders (17) is two sets, and the cleaning surface of the cleaning brushes (16) is in contact with the side of the filter plate (15).

7. The purification apparatus for salicylic acid production according to claim 1, characterized in that: The output end of the second motor (21) is fixedly connected to one end of the rotating rod (19).

8. The purification apparatus for salicylic acid production according to claim 1, characterized in that: The scraper (20) is semi-circular, and the scraping surface of the scraper (20) is in contact with the inner wall of the discharge pipe (18).

9. The purification apparatus for salicylic acid production according to claim 1, characterized in that: The filter plate (15) is fixedly connected to a protrusion (22) on its side, the filter box (3) is provided with a groove (23) on its surface, the filter box (3) is threaded with a hexagonal bolt (24) on its side, and the protrusion (22) is provided with a screw hole (25) on its side.

10. The purification apparatus for salicylic acid production according to claim 9, characterized in that: The protrusion (22) and the groove (23) are slidably connected, and the hexagonal bolt (24) and the screw hole (25) are threadedly connected.

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