A p-nitrochlorobenzene purification device

Abstract

This utility model relates to the field of nitrochlorobenzene purification technology, and discloses a p-nitrochlorobenzene purification device, including a mounting plate, a heating plate fixedly mounted on the bottom of the mounting plate, a mixing box fixedly connected to one side of the mounting plate, a crushing barrel connected through the upper surface of the mixing box, a crystallization barrel connected through the upper surface of the crushing barrel, a first variable speed motor fixedly mounted on the upper surface of the crystallization barrel, and a crushing frame fixedly connected to the output end of the first variable speed motor. This utility model facilitates the filtration of crushed coarse materials, and the addition of springs not only enhances the elasticity of the filter plates, but also causes the filter plates to vibrate back and forth, effectively improving the filtration effect and helping to filter materials of different particle sizes more finely. Furthermore, by releasing the limiting block from obstructing the crystallization plate, the operator can easily pull the crystallization plate out from inside the limiting ring for necessary cleaning, replacement, or maintenance.

Description

Technical Field

[0001] This utility model relates to the field of nitrochlorobenzene purification technology, and in particular to a p-nitrochlorobenzene purification device. Background Technology

[0002] p-Nitrochlorobenzene is an organic compound. While relatively stable, it can undergo a series of chemical reactions under specific conditions, such as reduction, nitration, and chlorination. It is a key raw material for many pesticide intermediates, used in the synthesis of insecticides, herbicides, and fungicides. For example, important pesticides like cypermethrin can be prepared using p-nitrochlorobenzene. It also plays a significant role in the pharmaceutical field, frequently used to synthesize various drug intermediates. For instance, it can be converted to p-aminophenol through reduction reactions for the production of drugs like acetaminophen. Furthermore, p-nitrochlorobenzene is an important organic synthesis raw material, widely used in the synthesis of various organic compounds, such as fragrances, plastic additives, and stabilizers.

[0003] A search revealed that Chinese Patent CN217526380U discloses a purification device for p-nitrochlorobenzene. This device addresses the issue that the crude p-nitrochlorobenzene material varies in size during production, preventing uniform mixing with water and reducing purification efficiency and quality. By incorporating a purification device and a moving device, the rotating rod and blades circulate in both directions within the purification cylinder. The blades pulverize the crude p-nitrochlorobenzene, resulting in a more uniform mixture with water, improving the evaporation effect of the crude product, and ultimately purifying the crude p-nitrochlorobenzene, thus increasing purification efficiency.

[0004] The above-mentioned purification device is beneficial to improve purification efficiency. When purifying crude p-nitrochlorobenzene, it is necessary to crush it first. However, the crushed p-nitrochlorobenzene is usually not filtered and is directly mixed with water. This can easily lead to the incompletely crushed crude p-nitrochlorobenzene entering the subsequent part of the purification system together with the crushed p-nitrochlorobenzene, resulting in a decrease in the crystal quality of the final product and affecting the crystallization efficiency, thereby reducing the purification efficiency. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a device for purifying p-nitrochlorobenzene.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a p-nitrochlorobenzene purification device, comprising an installation plate, a heating plate fixedly installed at the bottom of the installation plate, a mixing box fixedly connected to one side of the installation plate, a crushing barrel connected through the upper surface of the mixing box, a crystallization barrel connected through the upper surface of the crushing barrel, a first variable speed motor fixedly installed on the upper surface of the crystallization barrel, a crushing frame fixedly connected to the output end of the first variable speed motor, a second variable speed motor fixedly installed on one side of the mixing box, a stirring frame fixedly connected to the output end of the second variable speed motor, a discharge valve connected through the other side of the mixing box, two crystallization plates arranged inside the crystallization barrel, and a filter assembly arranged inside the mixing box.

[0007] As a further description of the above technical solution:

[0008] The filtration assembly includes two chutes, which are respectively formed on the inner wall of the mixing chamber. A sliding rod is slidably connected inside the chutes, and a rotating rod is fixedly connected to one end of the crushing frame.

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

[0010] A pull plate is fixedly connected between the two slide rods. Multiple fixed shells and multiple springs are fixedly connected to the upper surface of the pull plate. The springs are disposed inside the fixed shells, and a connecting block is fixedly connected to one end of each spring.

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

[0012] A filter plate is fixedly connected to the upper surface of the plurality of connecting blocks, a protrusion is fixedly connected to the upper surface of the filter plate, a protective ring is fixedly connected to the lower surface of the filter plate, and a limit bolt is threadedly connected to one side of the mixing box.

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

[0014] The crystallization barrel is equipped with a replacement component, which includes a limiting ring. The limiting ring is fixedly connected to the bottom of the crystallization barrel. Two fixing rods are fixedly connected to the upper surface of the inner wall of the crystallization barrel. A sliding sleeve is slidably connected to the outside of the fixing rods. A limiting block is fixedly connected to the lower surface of the sliding sleeve.

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

[0016] A stud is fixedly connected to one side of the limiting block, and the two studs pass through both sides of the crystallization barrel. Two stepper motors are fixedly installed on the upper surface of the crystallization barrel, and gears are respectively provided at the output end of the stepper motors and on both sides of the crystallization barrel.

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

[0018] Two of the gears are fixedly connected to two stepper motors, and the other two gears are rotatably connected to both sides of the crystallization tank. Two of the gears are meshed together, and two of the gears are threadedly connected to two studs. Two hinged covers are hinged to the upper surface of the crystallization tank. A cooling fan is fixedly installed inside the mounting plate. A dust-blocking plate is fixedly connected to one side of the cooling fan. Two guide plates are fixedly connected to one side of the mounting plate.

[0019] This utility model has the following beneficial effects:

[0020] 1. This utility model, through the setting of the filter assembly, facilitates the filtration of the crushed material after the crude p-nitrochlorobenzene is fed into the crushing barrel and crushed. During filtration, the spring increases the elasticity of the filter plate, causing it to vibrate back and forth. At the same time, when the rotating rod presses against the protrusion, it exerts downward pressure on the filter plate. With the help of the spring's rebound, it helps to filter materials of different particle sizes, enhances the consistency of material particle size, facilitates subsequent mixing, and helps to improve the efficiency of crystallization and purification. Furthermore, the connection of the sliding rod and the sliding groove facilitates the timely removal of the filter plate for cleaning and maintenance.

[0021] 2. By setting up a replacement component, this utility model facilitates the removal of the crystallization plate from the inside of the limiting ring after the crystallization plate is removed from the obstruction of the limiting block after crystallization of p-nitrochlorobenzene. This makes it easy to disassemble and replace the crystallization plate in a timely manner. When the crystallization plate malfunctions or needs to be cleaned or replaced, it is convenient for operators to replace the crystallization plate, thereby shortening downtime and improving the production efficiency of the entire purification device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure proposed in this utility model;

[0023] Figure 2 This is a partial structural diagram of the connection point of the crystallization barrel proposed in this utility model;

[0024] Figure 3 This is a schematic diagram of the limiting block structure proposed in this utility model;

[0025] Figure 4 This is a partial structural diagram of the limiting bolt connection proposed in this utility model;

[0026] Figure 5 This is a schematic diagram of the mixing box structure proposed in this utility model;

[0027] Figure 6 This is a schematic diagram of the stirring rack structure proposed in this utility model;

[0028] Figure 7 This is a schematic diagram of the crushing frame structure proposed in this utility model;

[0029] Figure 8 This is a schematic diagram of the slide bar structure proposed in this utility model.

[0030] Legend:

[0031] 1. Mounting plate; 2. Heating plate; 3. Mixing box; 4. Crushing barrel; 5. Crystallizing barrel; 6. First speed-changing motor; 7. Crushing frame; 8. Second speed-changing motor; 9. Stirring frame; 10. Discharge valve; 11. Crystallizing plate; 12. Filter plate; 13. Protrusion; 14. Slide groove; 15. Slide rod; 16. Fixed shell; 17. Spring; 18. Connecting block; 19. Pull-out plate; 20. Protective ring; 21. Limit bolt; 22. Limit ring; 23. Fixed rod; 24. Limit block; 25. Sliding sleeve; 26. Stud; 27. Stepper motor; 28. Gear; 29. ​​Opening and closing cover; 30. Cooling fan; 31. Guide plate; 32. Ash blocking plate; 33. Rotating rod. Detailed Implementation

[0032] 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.

[0033] As attached Figure 1-8 As shown, one embodiment of this utility model provides a p-nitrochlorobenzene purification device, including a mounting plate 1, a heating plate 2 fixedly mounted on the bottom of the mounting plate 1, a mixing tank 3 fixedly connected to one side of the mounting plate 1, a crushing barrel 4 connected through the upper surface of the mixing tank 3, a crystallization barrel 5 connected through the upper surface of the crushing barrel 4, a first variable speed motor 6 fixedly mounted on the upper surface of the crystallization barrel 5, a crushing frame 7 fixedly connected to the output end of the first variable speed motor 6, a second variable speed motor 8 fixedly mounted on one side of the mixing tank 3, a stirring frame 9 fixedly connected to the output end of the second variable speed motor 8, a discharge valve 10 connected through the other side of the mixing tank 3, two crystallization plates 11 arranged inside the crystallization barrel 5, a filter assembly arranged inside the mixing tank 3, the heating plate 2 facilitating heating of the mixing tank 3, and the crystallization plates 11 being arc-shaped.

[0034] As attached Figure 5 As shown, the filter assembly includes two chutes 14, which are respectively opened on the inner wall of the mixing box 3. The chutes 14 facilitate the installation of the slide rod 15.

[0035] As attached Figure 8 As shown, a sliding rod 15 is slidably connected inside the chute 14. A rotating rod 33 is fixedly connected to one end of the crushing frame 7. A pull-out plate 19 is fixedly connected between the two sliding rods 15. Multiple fixed shells 16 and multiple springs 17 are fixedly connected to the upper surface of the pull-out plate 19. The springs 17 are located inside the fixed shells 16. A connecting block 18 is fixedly connected to one end of the springs 17. A filter plate 12 is fixedly connected to the upper surface of the multiple connecting blocks 18. A protrusion 13 is fixedly connected to the upper surface of the filter plate 12. A protective ring 20 is fixedly connected to the lower surface of the filter plate 12. When the rotating rod 33 passes the protrusion 13, it will squeeze the protrusion 13. The spring 17 has an elastic pushing effect on the filter plate 12, causing the filter plate 12 to shake up and down. The fixed shells 16 and the protective ring 20 have a protective effect on the springs 17. The connection of the pull-out plate 19 improves the convenience of pulling out the filter plate 12.

[0036] As attached Figure 4 As shown, a limit bolt 21 is threaded on one side of the mixing box 3, which serves to limit the sliding rod 15.

[0037] As attached Figure 7 As shown, a replacement assembly is provided inside the crystallization tank 5. The replacement assembly includes a limiting ring 22, which is fixedly connected to the bottom of the crystallization tank 5. Two fixing rods 23 are fixedly connected to the upper surface of the inner wall of the crystallization tank 5. A sliding sleeve 25 is slidably connected to the outside of the fixing rods 23. A limiting block 24 is fixedly connected to the lower surface of the sliding sleeve 25. A stud 26 is fixedly connected to one side of the limiting block 24. The two studs 26 pass through both sides of the crystallization tank 5. Two stepper motors 27 are fixedly installed on the upper surface of the crystallization tank 5. Gears 28 are respectively provided at the output end of the stepper motors 27 and on both sides of the crystallization tank 5. Two gears 28 are fixedly connected to two stepper motors 27, and the other two gears 28 are rotatably connected to both sides of the crystallization tank 5. Two of the gears 28 are meshed together, and two of the gears 28 are threadedly connected to two studs 26. The limiting ring 22 serves as a bottom limit for the installed crystallization plate 11. The studs 26 facilitate pushing and pulling the limiting block 24 to move. The middle of the two gears 28 has a threaded hole that matches the stud 26. The sliding sleeve 25 slides inside the fixed rod 23 and slides above the inner wall surface of the crystallization tank 5.

[0038] As attached Figure 1 As shown, the upper surface of the crystallization tank 5 is hinged with two hinged covers 29, and a cooling fan 30 is fixedly installed inside the mounting plate 1. Two guide plates 31 are fixedly connected to one side of the mounting plate 1, and the guide plates 31 facilitate the guidance of the airflow.

[0039] As attached Figure 2As shown, a dust-blocking plate 32 is fixedly connected to one side of the air cooler 30, which serves to block dust on one side of the air cooler 30.

[0040] Working principle: In use, open the opening and closing cover 29, and put the crude p-nitrochlorobenzene into the crushing barrel 4 above the filter plate 12. Turn on the first speed motor 6, and use its output end to drive the crushing frame 7 to rotate, crushing the crude material. When the crushing frame 7 rotates, it will drive the rotating rod 33 to rotate on its own axis and revolve around the center. When the rotating rod 33 revolves and presses against the protrusion 13, it will drive the filter plate 12 to press down. When the filter plate 12 presses down, it will press against the spring 17 and the connecting block 18. When the rotating rod 33 rotates away from the protrusion 13, it will drive the filter plate 12 to rebound, thereby causing the filter plate 12 to vibrate and filter the material. Material crushed to a suitable particle size will pass through filter plate 12 to the inside of mixing box 3. Water will then be added to the mixing box 3 through opening and closing cover 29. Then, the second variable speed motor 8 will be turned on, and its output end will drive the stirring frame 9 to rotate, thereby stirring the water and material inside the mixing box 3 and mixing them. After mixing, the heating plate 2 will be turned on to heat the mixing box 3, so that the material inside will be heated and turn into a gaseous state and rise. Then, the cold fan 30 will be turned on to blow cold air to the crystallization tank 5, so that a low temperature environment will be formed inside the crystallization tank 5. When the material rises to the inside of the crystallization tank 5 and stays on the surface of the crystallization plate 11, the gaseous state will turn into a solid state and form crystals, thereby completing the crystallization.

[0041] When it is necessary to remove the crystallizing plate 11 from the inside of the crystallizing barrel 5, turn on the stepper motors 27 on both sides, and use their output ends to drive the corresponding gears 28 to rotate. Under the action of the meshing of the two gears 28, the other gear 28 will be driven to rotate. When the other gear 28 rotates, it is threadedly connected to the corresponding stud 26, which will drive the stud 26 and the corresponding limiting block 24 to slide on the outside of the fixed rod 23 in the sliding sleeve 25. Under the action of sliding limit on the upper surface of the inner wall of the crystallizing barrel 5, the stud 26 drives the limiting block 24 to open the gap with the crystallizing plate 11, thereby releasing the limit of the crystallizing plate 11. Then open the opening and closing cover 29 to remove the crystallizing plate 11 from the inside of the crystallizing barrel 5, which facilitates the disassembly of the crystallizing plate 11. The above operation is reversed during installation.

[0042] 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 plant for the purification of p-nitrochlorobenzene comprising a mounting plate (1), characterized in that: A heating plate (2) is fixedly installed at the bottom of the mounting plate (1). A mixing box (3) is fixedly connected to one side of the mounting plate (1). A crushing barrel (4) is connected through the upper surface of the mixing box (3). A crystallizing barrel (5) is connected through the upper surface of the crushing barrel (4). A first variable speed motor (6) is fixedly installed on the upper surface of the crystallizing barrel (5). A crushing frame (7) is fixedly connected to the output end of the first variable speed motor (6). A second variable speed motor (8) is fixedly installed on one side of the mixing box (3). A stirring frame (9) is fixedly connected to the output end of the second variable speed motor (8). A discharge valve (10) is connected through the other side of the mixing box (3). Two crystallizing plates (11) are arranged inside the crystallizing barrel (5). A filter assembly is arranged inside the mixing box (3).

2. The apparatus for purifying p-nitrochlorobenzene according to claim 1, characterized by: The filter assembly includes two chutes (14), which are respectively opened on the inner wall of the mixing box (3). A sliding rod (15) is slidably connected inside the chutes (14), and a rotating rod (33) is fixedly connected to one end of the crushing frame (7).

3. The apparatus for purifying p-nitrochlorobenzene according to claim 2, characterized by: A pull plate (19) is fixedly connected between the two slide rods (15). Multiple fixed shells (16) and multiple springs (17) are fixedly connected to the upper surface of the pull plate (19). The springs (17) are located inside the fixed shells (16), and a connecting block (18) is fixedly connected to one end of the springs (17).

4. The apparatus for purifying p-nitrochlorobenzene according to claim 3, characterized by: A filter plate (12) is fixedly connected to the upper surface of the multiple connecting blocks (18), a protrusion (13) is fixedly connected to the upper surface of the filter plate (12), a protective ring (20) is fixedly connected to the lower surface of the filter plate (12), and a limit bolt (21) is threadedly connected to one side of the mixing box (3).

5. The apparatus for purifying p-nitrochlorobenzene according to claim 1, characterized by: The crystallization barrel (5) is provided with a replacement component inside. The replacement component includes a limiting ring (22), which is fixedly connected to the bottom of the crystallization barrel (5). Two fixing rods (23) are fixedly connected to the upper surface of the inner wall of the crystallization barrel (5). A sliding sleeve (25) is slidably connected to the outside of the fixing rods (23). A limiting block (24) is fixedly connected to the lower surface of the sliding sleeve (25).

6. The apparatus for purifying p-nitrochlorobenzene according to claim 5, characterized by: A stud (26) is fixedly connected to one side of the limiting block (24). The two studs (26) pass through both sides of the crystallization barrel (5). Two stepper motors (27) are fixedly installed on the upper surface of the crystallization barrel (5). Gears (28) are respectively provided at the output end of the stepper motor (27) and on both sides of the crystallization barrel (5).

7. The apparatus for the purification of p-nitrochlorobenzene according to claim 6, characterized in that: Two of the gears (28) are fixedly connected to two stepper motors (27), and the other two gears (28) are rotatably connected to both sides of the crystallization tank (5). Two of the gears (28) are meshed together, and two of the gears (28) are threaded together with two studs (26). Two hinged covers (29) are hinged to the upper surface of the crystallization tank (5). A cooling fan (30) is fixedly installed inside the mounting plate (1). A dust-blocking plate (32) is fixedly connected to one side of the cooling fan (30). Two guide plates (31) are fixedly connected to one side of the mounting plate (1).

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