An aryl pyrazole nitrile continuous crystallization device

Abstract

The present invention belongs to the technical field of crystallization devices, and in particular relates to a continuous crystallization device for arylpyrazole nitrile, which includes a crystallizer housing. A controller is fixedly connected to the front side wall of the crystallizer housing, and a plurality of support frames are fixedly connected to the outer wall of the crystallizer housing. A feed pipe is fixedly communicated with the side wall of the crystallizer housing. When using the crystallization device to crystallize arylpyrazole nitrile, the present invention can automatically put seeds into the mother liquor when the supersaturation of the mother liquor reaches the metastable zone and is about to enter the unstable zone. There is enough solute in the mother liquor to precipitate on the surface of the seeds, but not so much spontaneous nucleation, thus ensuring the crystallization quality. And after the seeds are put into the crystallization device, the seeds can be evenly distributed in the mother liquor, enabling the arylpyrazole nitrile solute in the mother liquor to fully contact the seeds and crystallize on their surfaces, improving the utilization rate of the solute and accelerating the crystallization speed.

Description

Technical Field

[0001] The present invention belongs to the technical field of crystallization devices, and in particular relates to a continuous crystallization device for arylpyrazole nitrile. Background Art

[0002] Crystallization is a common and basic chemical process. The production results of many chemical products are ultimately embodied in the form of crystal particles. The generation method of crystals varies according to different product physical properties. For example, a continuous freezing crystallization device proposed in Patent Publication No. CN118787979A.

[0003] During the production of arylpyrazole nitrile, a crystallization device is required for crystallization. And in order to promote the nucleation of arylpyrazole nitrile, during the operation of the crystallization device, seed crystals also need to be put into the device to improve the crystallization efficiency;

[0004] During the process of putting in the seed crystals, there are problems such as putting them in too early, resulting in difficulty in starting the crystallization process or poor crystallization effect, and putting them in too late, which will compete with the spontaneously formed crystal nuclei for growth, leading to uneven crystal particle size distribution and a decline in product quality. At the same time, putting the seed crystals from above the mother liquor will cause the seed crystals to concentrate on the surface of the mother liquor and be difficult to evenly disperse throughout the mother liquor. This will result in that only the surface area of the mother liquor has seed crystals as the crystallization nuclei, while the lower part and other areas lack seed crystals, making the crystallization mainly occur on the surface, and the crystal growth is uneven. Eventually, the produced crystal particle size difference is significant, which not only reduces the product quality but also brings many operation problems to subsequent processes such as filtration and drying, increasing production costs and energy consumption.

[0005] Therefore, a continuous crystallization device for arylpyrazole nitrile is proposed to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a continuous crystallization device for arylpyrazole nitrile in view of the above problems.

[0007] To achieve the above purpose, the present invention adopts the following technical solutions: A continuous crystallization device for arylpyrazole nitrile, including a crystallizer housing, the front side wall of the crystallizer housing is fixedly connected with a controller, the outer wall of the crystallizer housing is fixedly connected with a plurality of support frames, the side wall of the crystallizer housing is fixedly communicated with a feed pipe, the lower side wall of the crystallizer housing is fixedly communicated with a discharge pipe, and a discharge valve is arranged in the discharge pipe. It further includes:

[0008] A cooling jacket is fixedly sleeved on the outer wall of the crystallizer housing. The inner wall of the cooling jacket is fixedly connected with a spiral plate, and the cooling jacket is divided into spiral water channels by the spiral plate. The right side wall of the cooling jacket is fixedly communicated with a water inlet pipe, and the left side wall of the cooling jacket is fixedly communicated with a water outlet pipe;

[0009] A stirring assembly is arranged on the upper side wall of the crystallizer housing and is used for stirring the mother liquor in the crystallizer housing;

[0010] A feeding assembly is arranged on the upper side wall of the crystallizer housing and is used for uniformly feeding crystal seeds;

[0011] A dredging assembly is arranged at the lower end of the stirring assembly and is used for dredging the discharge pipe.

[0012] Preferably, the stirring assembly includes a stirring pipe rotatably connected to the upper side wall of the crystallizer housing. Both the upper and lower ends of the stirring pipe are of open structures. The upper side wall of the crystallizer housing is connected with a stirring motor through a support seat. The output end of the stirring motor is connected with a rotating rod through a detection assembly. The right end of the rotating rod is drivingly connected with the stirring pipe through a bevel gear transmission assembly. A plurality of transverse pipes are fixedly communicated with the rod wall of the stirring pipe inside the crystallizer housing. One end of the transverse pipes on the same side away from the stirring pipe is fixedly connected with the same stirring plate.

[0013] Preferably, the detection assembly includes a detection cylinder fixedly connected to the output end of the stirring motor. Both the left and right ends of the detection cylinder are of closed structures. The left inner wall of the detection cylinder is rotatably connected with the rotating rod. Two connecting plates are fixedly connected to the rod wall of the rotating rod. Two fixing plates are fixedly connected to the inner wall of the detection cylinder. The opposite side walls of the connecting plate and the fixing plate are fixedly connected with the same arc-shaped elastic rod. One end of the connecting plate away from the rotating rod is fixedly connected with a conductive block. A conductive plate is embedded in the inner wall of the detection cylinder. The conductive block is electrically connected with an external power supply, and the conductive plate is electrically connected with a controller.

[0014] Preferably, an air pump is fixedly connected to the upper side wall of the crystallizer housing. The air outlet end of the air pump is fixedly communicated with an air supply pipe. The air supply pipe is of an inverted L-shaped structure. The lower end of the air supply pipe is rotatably connected with the upper port of the stirring pipe through a seal bearing. A plurality of exhaust pipes are fixedly communicated with the pipe wall of the transverse pipes. A pressure valve is arranged in the exhaust pipes. The upper side wall of the crystallizer housing is fixedly communicated with a pneumatic pipe.

[0015] Preferably, the feeding assembly includes a support cover fixedly connected to the upper side wall of the crystallizer housing. The upper end of the pneumatic pipe passes through the support cover. The air inlet end of the air pump passes through the support cover. The upper side wall of the support cover is connected with a storage cylinder through a bracket. The lower side wall of the storage cylinder is fixedly communicated with a feeding pipe. The lower end of the feeding pipe passes through the support cover and is fixedly communicated with a cylinder. A driving motor is fixedly connected to the left side wall of the cylinder. The output end of the driving motor passes through the cylinder and is connected with a circular plate. A plurality of material storage grooves are arranged on the side wall of the circular plate. The lower side wall of the storage cylinder is fixedly communicated with a vertical pipe. The lower end of the vertical pipe is communicated with the air supply pipe.

[0016] Preferably, the dredging component includes a support plate fixedly connected to the inner wall of the stirring pipe. An air inlet pipe is fixedly communicated with the upper side wall of the support plate. A first control valve is arranged in the air inlet pipe. The lower end of the air inlet pipe extends out of the support plate and is fixedly communicated with a telescopic pipe. The lower end of the telescopic pipe is fixedly connected with a cleaning cone head. A spring is fixedly connected between the cleaning cone head and the support plate. A flow meter is arranged in the discharge pipe. The flow meter is electrically connected to the controller.

[0017] Preferably, two guide pins are fixedly connected to the lower side wall of the support plate. Two guide grooves matching the guide pins are formed on the upper side wall of the cleaning cone head.

[0018] Preferably, an air release pipe is fixedly communicated with the pipe wall of the air inlet pipe. A second control valve is arranged in the air release pipe. The end of the air release pipe away from the air inlet pipe extends out of the stirring pipe.

[0019] Compared with the existing technology, the advantages of an arylpyrazole nitrile continuous crystallization device are as follows:

[0020] By arranging the detection component, when using the crystallization device to crystallize arylpyrazole nitrile, seeds can be automatically put into the mother liquor when the supersaturation of the mother liquor reaches the metastable zone and is about to enter the unstable zone. There is enough solute in the mother liquor to precipitate on the surface of the seeds, but not so much that spontaneous nucleation occurs excessively, thus ensuring the crystallization quality.

[0021] By arranging the stirring component and the feeding component, after the seeds are put into the crystallization device, the seeds can be evenly distributed in the mother liquor, enabling the arylpyrazole nitrile solute in the mother liquor to fully contact the seeds and crystallize on their surfaces, improving the utilization rate of the solute, accelerating the crystallization speed, thus improving the efficiency of the entire crystallization process, shortening the crystallization time, and the crystal growth is uniform, the particle size distribution is uniform, and the physical and chemical properties of the product are more consistent and the quality is more stable, which is beneficial to subsequent processing and application.

[0022] By arranging the dredging component, after the discharge pipe of the crystallization device is blocked, the blocked discharge pipe can be automatically dredged, thus ensuring the working efficiency of the crystallization device, and moreover, manual dredging is not required, reducing the workload of the operator.

[0023] By arranging the air pump, the air supply pipe, the exhaust pipe, and the pressure valve, while using the stirring component to stir the mother liquor inside the crystallization device, uniform small bubbles can be conveyed into the mother liquor, which not only improves the stirring effect of the mother liquor, but also accelerates the diffusion rate of the solute to the surface of the seeds, improving the overall crystallization rate, and the bubbles can also prevent crystal aggregation, keeping the crystals in a better dispersed state, which helps to obtain crystal products with uniform particle size distribution and higher purity. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of a continuous crystallization device for arylpyrazole nitrile provided by the present invention;

[0025] Figure 2 It is a schematic internal structure diagram of the crystallizer housing in a continuous crystallization device for arylpyrazole nitrile provided by the present invention;

[0026] Figure 3 It is a schematic diagram of the positional relationship between the cylinder and the circular plate in a continuous crystallization device for arylpyrazole nitrile provided by the present invention;

[0027] Figure 4 It is a schematic structural diagram of the detection component in a continuous crystallization device for arylpyrazole nitrile provided by the present invention;

[0028] Figure 5 It is a schematic surface structure diagram of the horizontal pipe in a continuous crystallization device for arylpyrazole nitrile provided by the present invention;

[0029] Figure 6 It is a schematic structural diagram of the dredging component in a continuous crystallization device for arylpyrazole nitrile provided by the present invention.

[0030] In the figure: 1. Crystallizer housing; 2. Controller; 3. Support frame; 4. Feed pipe; 5. Discharge pipe; 6. Discharge valve; 7. Cooling jacket; 8. Spiral plate; 9. Water inlet pipe; 10. Water outlet pipe; 11. Stirring component; 111. Stirring pipe; 112. Stirring motor; 12. Rotating rod; 13. Horizontal pipe; 14. Stirring plate; 15. Detection component; 151. Detection cylinder; 152. Connecting plate; 16. Fixed plate; 17. Arc-shaped elastic rod; 18. Conductive block; 19. Conductive plate; 20. Air pump; 21. Air supply pipe; 22. Exhaust pipe; 23. Pressure valve; 24. Pneumatic pipe; 25. Feeding component; 251. Support cover; 252. Storage cylinder; 26. Feeding pipe; 27. Cylinder; 28. Driving motor; 29. Circular plate; 30. Storage tank; 31. Vertical pipe; 32. Dredging component; 321. Support plate; 322. Air inlet pipe; 33. First control valve; 34. Expansion pipe; 35. Cleaning cone head; 36. Flowmeter; 37. Guide pin; 38. Air discharge pipe; 39. Second control valve. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0032] Such as Figures 1-6As shown in the figure, an aryl pyrazole nitrile continuous crystallization device includes a crystallizer housing 1. A controller 2 is fixedly connected to the front side wall of the crystallizer housing 1. A plurality of support frames 3 are fixedly connected to the outer wall of the crystallizer housing 1. A feed pipe 4 is fixedly communicated with the side wall of the crystallizer housing 1. A discharge pipe 5 is fixedly communicated with the lower side wall of the crystallizer housing 1. A discharge valve 6 is arranged in the discharge pipe 5. It further includes:

[0033] A cooling jacket 7 is fixedly sleeved on the outer wall of the crystallizer housing 1. A spiral plate 8 is fixedly connected to the inner wall of the cooling jacket 7. The cooling jacket 7 is divided into spiral water channels by the spiral plate 8. A water inlet pipe 9 is fixedly communicated with the right side wall of the cooling jacket 7. A water outlet pipe 10 is fixedly communicated with the left side wall of the cooling jacket 7;

[0034] A stirring assembly 11 is arranged on the upper side wall of the crystallizer housing 1 and is used for stirring the mother liquor in the crystallizer housing 1. The stirring assembly 11 includes a stirring pipe 111 rotatably connected to the upper side wall of the crystallizer housing 1. Both the upper and lower ends of the stirring pipe 111 are of open structures. The upper side wall of the crystallizer housing 1 is connected with a stirring motor 112 through a support seat. The output end of the stirring motor 112 is connected with a rotating rod 12 through a detection assembly 15. The right end of the rotating rod 12 is in transmission connection with the stirring pipe 111 through a bevel gear transmission assembly. A plurality of transverse pipes 13 are fixedly communicated with the rod wall of the stirring pipe 111 located inside the crystallizer housing 1. One end of the transverse pipes 13 on the same side away from the stirring pipe 111 is fixedly connected to the same stirring plate 14, which can stir the mother liquor;

[0035] A feeding assembly 25 is arranged on the upper side wall of the crystallizer housing 1 and is used for uniformly feeding crystal seeds. The feeding assembly 25 includes a support cover 251 fixedly connected to the upper side wall of the crystallizer housing 1. The upper end of the air pressure pipe 24 passes through the support cover 251. The air inlet end of the air pump 20 passes through the support cover 251. The upper side wall of the support cover 251 is connected with a storage cylinder 252 through a bracket. A feeding pipe 26 is fixedly communicated with the lower side wall of the storage cylinder 252. The lower end of the feeding pipe 26 passes through the support cover 251 and is fixedly communicated with a cylinder 27. A driving motor 28 is fixedly connected to the left side wall of the cylinder 27. The output end of the driving motor 28 passes through the cylinder 27 and is connected with a circular plate 29. A plurality of storage grooves 30 are formed in the side wall of the circular plate 29. A vertical pipe 31 is fixedly communicated with the lower side wall of the storage cylinder 252. The lower end of the vertical pipe 31 is communicated with the air supply pipe 21, which can automatically feed an appropriate amount of crystal seeds into the mother liquor;

[0036] The dredging component 32 is arranged at the lower end of the stirring component 11 and is used for dredging the discharge pipe 5. The dredging component 32 includes a support plate 321 fixedly connected to the inner wall of the stirring pipe 111. An air inlet pipe 322 is fixedly communicated with the upper side wall of the support plate 321. A first control valve 33 is arranged in the air inlet pipe 322. The lower end of the air inlet pipe 322 extends out of the support plate 321 and is fixedly communicated with a telescopic pipe 34. A gas discharge pipe 38 is fixedly communicated with the pipe wall of the air inlet pipe 322. A second control valve 39 is arranged in the gas discharge pipe 38. The end of the gas discharge pipe 38 far away from the air inlet pipe 322 extends out of the stirring pipe 111 and can discharge the gas in the telescopic pipe 34. The lower end of the telescopic pipe 34 is fixedly connected with a cleaning cone head 35. A spring is fixedly connected between the cleaning cone head 35 and the support plate 321. A flow meter 36 is arranged in the discharge pipe 5. The flow meter 36 is electrically connected to the controller 2. After the discharge pipe 5 of the crystallization device is blocked, the blocked discharge pipe 5 can be automatically dredged.

[0037] The detection component 15 includes a detection cylinder 151 fixedly connected to the output end of the stirring motor 112. Both the left and right ends of the detection cylinder 151 are of closed structures. The left inner wall of the detection cylinder 151 is rotationally connected to the rotating rod 12. Two connecting plates 152 are fixedly connected to the rod wall of the rotating rod 12. Two fixing plates 16 are fixedly connected to the inner wall of the detection cylinder 151. An arc-shaped elastic rod 17 is fixedly connected to the side walls of the opposite sides of the connecting plate 152 and the fixing plate 16. One end of the connecting plate 152 far away from the rotating rod 12 is fixedly connected with a conductive block 18. A conductive plate 19 is embedded in the inner wall of the detection cylinder 151. The conductive block 18 is electrically connected to an external power supply. The conductive plate 19 is electrically connected to the controller 2, and can detect the supersaturation of the mother liquor.

[0038] An air pump 20 is fixedly connected to the upper side wall of the crystallizer shell 1. The air outlet end of the air pump 20 is fixedly communicated with an air delivery pipe 21. The air delivery pipe 21 is of an inverted L-shaped structure. The lower end of the air delivery pipe 21 is rotationally connected to the upper port of the stirring pipe 111 through a sealing bearing. A plurality of exhaust pipes 22 are fixedly communicated with the pipe wall of the horizontal pipe 13. A pressure valve 23 is arranged in the exhaust pipe 22. An air pressure pipe 24 is fixedly communicated with the upper side wall of the crystallizer shell 1, and can convey uniform small bubbles into the mother liquor.

[0039] Two guide pins 37 are fixedly connected to the lower side wall of the support plate 321. Two guide grooves matching the guide pins 37 are opened on the upper side wall of the cleaning cone head 35, which improves the stability of the up and down movement of the cleaning cone head 35.

[0040] The operating principle of the present invention is described as follows: The mother liquor is transported into the crystallizer housing 1 through the feed pipe 4. Then, the operator sends an electrical signal to the controller 2 through an external remote control device. After receiving the electrical signal, the controller 2 will control the operation of the external pump mechanism. The external pump mechanism is used to transport the refrigerant into the water inlet pipe 9 and then through the water inlet pipe 9 into the cooling jacket 7. The refrigerant will flow through the spiral plate 8 in the cooling jacket 7 and be discharged from the cooling jacket 7 through the water outlet pipe 10, thereby cooling the mother liquor inside the crystallizer housing 1;

[0041] At the same time, the controller 2 will also control the operation of the stirring motor 112. The stirring motor 112 will control the rotation of the rotating rod 12 through the detection component 15. The rotating rod 12 controls the rotation of the stirring pipe 111 through the bevel gear transmission component. The stirring pipe 111 will drive the horizontal pipe 13 and the stirring plate 14 to rotate together, and the horizontal pipe 13 and the stirring pipe 111 are used to stir the mother liquor. While controlling the operation of the stirring motor 112, the controller 2 will also control the operation of the air pump 20. The air pump 20 transports the externally filtered gas into the air supply pipe 21 and then through the air supply pipe 21 into the stirring pipe 111. Since the horizontal pipe 13 and the stirring pipe 111 are connected, the gas will also be transported into the exhaust pipe 22 through the horizontal pipe 13. When the internal air pressure of the exhaust pipe 22, the horizontal pipe 13 and the stirring pipe 111 exceeds the threshold value of the pressure valve 23, the gas will be transported into the mother liquor through the exhaust pipe 22, thereby transporting bubbles into the mother liquor, accelerating the stirring of the mother liquor. The discharged gas will be discharged from the crystallizer housing 1 through the air pressure pipe 24, and there is no need to increase the rotation speed of the stirring pipe 111 and the stirring plate 14, thus avoiding the too fast stirring speed of the stirring plate 14, which will affect the subsequent crystal growth, and causing the mother liquor in the crystallizer to flow too violently, making the heat transfer process complex and unstable, resulting in too low local temperature of the mother liquor, causing the solute to crystallize rapidly locally while the crystallization process in other regions is inhibited, affecting the overall crystallization efficiency and product quality;

[0042] During the crystallization process of the mother liquor, its viscosity will gradually increase. When the supersaturation of the mother liquor reaches the metastable zone and is about to enter the unstable zone, the viscosity of the mother liquor will reach the set threshold. During the stirring process of the stirring plate 14, it will encounter a large resistance, and this resistance will be transmitted to the rotating rod 12 through the horizontal pipe 13, the stirring pipe 111, and the bevel gear transmission assembly. The detection cylinder 151 will continuously rotate driven by the stirring motor 112, the detection cylinder 151 will drive the fixed plate 16 to rotate, and the fixed plate 16 will apply pressure to the connecting plate 152 through the compressed arc-shaped elastic rod 17. When the rotating rod 12 encounters a large resistance due to the increased viscosity of the mother liquor, the fixed plate 16 needs to compress the arc-shaped elastic rod 17 by a large stroke to overcome the resistance. Therefore, the connecting plate 152 will drive the conductive block 18 to move relative to the detection cylinder 151. During the movement of the conductive block 18, it will contact the conductive plate 19. The conductive block 18 is electrically connected to the external power supply, and the conductive plate 19 is electrically connected to the controller 2. When the conductive block 18 contacts the conductive plate 19, an electrical signal will be transmitted to the controller 2. After receiving this electrical signal, the controller 2 will control the driving motor 28 to work for a set time and deliver a certain amount of crystal seeds into the crystallizer;

[0043] The driving motor 28 will drive the circular plate 29 to rotate. Under the action of gravity, part of the crystal seeds placed in the storage cylinder 252 will be stored in the storage tank 30. During the rotation of the circular plate 29, it will drive the crystal seeds inside the storage tank 30 to rotate to the lower part. Under the action of gravity, the crystal seeds inside the storage tank 30 will fall into the air supply pipe 21 through the vertical pipe 31. Referring to the above principle, the crystal seeds will be evenly discharged into the mother liquor through the exhaust pipe 22, enabling the arylpyrazole nitrile solute in the mother liquor to fully contact the crystal seeds and crystallize on their surfaces, improving the utilization rate of the solute, accelerating the crystallization speed, thereby improving the efficiency of the entire crystallization process, shortening the crystallization time, and the crystal growth is uniform, the particle size distribution is uniform, and the physical and chemical properties of the product are more consistent and the quality is more stable, which is beneficial to subsequent processing and application;

[0044] When the crystallization device is working and the discharge pipe 5 is blocked, after the controller 2 detects this situation through the flow meter 36, it will control the first control valve 33 to open (arylpyrazole nitrile will only be discharged after the crystal seeds are put in, and only then is it possible to cause the discharge pipe 5 to be blocked. At this time, the crystal seed putting work has been completed, and there will be no crystal seeds in the stirring pipe 111). Referring to the above principle, the gas delivered by the air pump 20 will be delivered into the telescopic pipe 34 through the air inlet pipe 322, increasing the air pressure inside the telescopic pipe 34. The lower end of the telescopic pipe 34 will expand, thereby driving the cleaning cone head 35 to move downward against the elastic force of the spring and extend into the discharge pipe 5, and the cleaning cone head 35 will rotate with the stirring pipe 111, so as to dredge the blocked materials inside the discharge pipe 5 and ensure the discharge speed of the crystallization device.

[0045] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An aryl pyrazole nitrile continuous crystallization device, comprising a crystallizer housing (1), a controller (2) is fixedly connected to the front side wall of the crystallizer housing (1), a plurality of support frames (3) are fixedly connected to the outer wall of the crystallizer housing (1), a feed pipe (4) is fixedly communicated with the side wall of the crystallizer housing (1), a discharge pipe (5) is fixedly communicated with the lower side wall of the crystallizer housing (1), and a discharge valve (6) is arranged in the discharge pipe (5), characterized in that, It further includes: A cooling jacket (7) fixedly sleeved on the outer wall of the crystallizer shell (1); A stirring assembly (11) arranged on the upper side wall of the crystallizer shell (1) for stirring the mother liquor in the crystallizer shell (1); A feeding assembly (25) arranged on the upper side wall of the crystallizer shell (1) for uniformly feeding crystal seeds; A dredging assembly (32) arranged at the lower end of the stirring assembly (11) for dredging the discharge pipe (5). The stirring assembly (11) includes a stirring pipe (111) rotatably connected to the upper side wall of the crystallizer shell (1). Both the upper and lower ends of the stirring pipe (111) are of open structures. The upper side wall of the crystallizer shell (1) is connected with a stirring motor (112) through a support seat. The output end of the stirring motor (112) is connected with a rotating rod (12) through a detection assembly (15). The right end of the rotating rod (12) is in transmission connection with the stirring pipe (111) through a bevel gear transmission assembly. A plurality of transverse pipes (13) are fixedly communicated with the rod wall of the stirring pipe (111) inside the crystallizer shell (1). The detection assembly (15) includes a detection cylinder (151) fixedly connected to the output end of the stirring motor (112). Both the left and right ends of the detection cylinder (151) are of closed structures. The left inner wall of the detection cylinder (151) is rotatably connected with the rotating rod (12). Two connecting plates (152) are fixedly connected to the rod wall of the rotating rod (12). Two fixing plates (16) are fixedly connected to the inner wall of the detection cylinder (151). The same arc-shaped elastic rod (17) is fixedly connected to the opposite side walls of the connecting plate (152) and the fixing plate (16). One end of the connecting plate (152) far from the rotating rod (12) is fixedly connected with a conductive block (18). A conductive plate (19) is embedded in the inner wall of the detection cylinder (151). The conductive block (18) is electrically connected to an external power supply. The conductive plate (19) is electrically connected to a controller (2). An air pump (20) is fixedly connected to the upper side wall of the crystallizer shell (1). The air outlet end of the air pump (20) is fixedly communicated with an air supply pipe (21). The lower end of the air supply pipe (21) and the upper port of the stirring pipe (111) are rotatably connected through a sealing bearing. A plurality of exhaust pipes (22) are fixedly communicated with the pipe wall of the transverse pipe (13). The feeding assembly (25) includes a storage cylinder (252). The lower side wall of the storage cylinder (252) is fixedly communicated with a feeding pipe (26). The lower end of the feeding pipe (26) is fixedly communicated with a cylinder (27). A driving motor (28) is fixedly connected to the left side wall of the cylinder (27). The output end of the driving motor (28) passes through the cylinder (27) and is connected with a circular plate (29). A plurality of material storage grooves (30) are formed in the side wall of the circular plate (29). The lower side wall of the cylinder (27) is fixedly communicated with a vertical pipe (31). The lower end of the vertical pipe (31) is communicated with the air supply pipe (21). The controller (2) is used to control the driving motor (28).

2. The continuous crystallization device for arylpyrazole nitrile according to claim 1, wherein The air supply pipe (21) has an inverted L-shaped structure. A pressure valve (23) is provided inside the exhaust pipe (22). An air pressure pipe (24) is fixedly communicated with the upper side wall of the crystallizer housing (1).

3. The continuous crystallization device for arylpyrazole nitrile according to claim 2, characterized in that, The feeding assembly (25) further includes a support cover (251) fixedly connected to the upper side wall of the crystallizer housing (1). The upper end of the air pressure pipe (24) passes through the support cover (251). The air inlet end of the air pump (20) passes through the support cover (251). The upper side wall of the support cover (251) is connected to a storage cylinder (252) through a bracket. The lower end of the feeding pipe (26) passes through the support cover (251). A spiral plate (8) is fixedly connected to the inner wall of the cooling jacket (7). The cooling jacket (7) is divided into a spiral water channel by the spiral plate (8). A water inlet pipe (9) is fixedly communicated with the right side wall of the cooling jacket (7). A water outlet pipe (10) is fixedly communicated with the left side wall of the cooling jacket (7). One end of the horizontal pipe (13) far from the stirring pipe (111) on the same side is fixedly connected to the same stirring plate (14).

4. The continuous crystallization device for arylpyrazole nitrile according to claim 1, characterized in that, The dredging assembly (32) includes a support plate (321) fixedly connected to the inner wall of the stirring pipe (111). An air inlet pipe (322) is fixedly communicated with the upper side wall of the support plate (321). A first control valve (33) is provided inside the air inlet pipe (322). The lower end of the air inlet pipe (322) extends out of the support plate (321) and is fixedly communicated with a telescopic pipe (34). A cleaning cone head (35) is fixedly connected to the lower end of the telescopic pipe (34). A spring is fixedly connected between the cleaning cone head (35) and the support plate (321). A flow meter (36) is provided inside the discharge pipe (5). The flow meter (36) is electrically connected to the controller (2).

5. The continuous crystallization device for arylpyrazole nitrile according to claim 4, characterized in that, Two guide pins (37) are fixedly connected to the lower side wall of the support plate (321). Two guide grooves matching the guide pins (37) are formed on the upper side wall of the cleaning cone head (35).

6. A continuous crystallization device for aryl pyrazole nitrile according to claim 4, characterized in that, An air release pipe (38) is fixedly communicated with the pipe wall of the air inlet pipe (322). A second control valve (39) is provided inside the air release pipe (38). One end of the air release pipe (38) far from the air inlet pipe (322) extends out of the stirring pipe (111).

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