Safe reaction device for continuous chlorination of p-trifluoromethylaniline

Abstract

The invention relates to a safe reaction device for continuous chlorination of p-trifluoromethylaniline, and relates to the technical field of chemical production, the safe reaction device comprises a reaction tank and a plurality of reaction tubes, a raw material cavity, a temperature control cavity and a collection cavity are arranged in the reaction tank, the reaction tubes are arranged in the reaction tank and are communicated with the raw material cavity and the collection cavity, and the temperature control cavity is communicated with the collection cavity. The reaction tank is provided with an air inlet pipe communicated with the temperature control cavity, the air inlet pipe is provided with an air inlet branch pipe, and the air inlet branch pipe is communicated with the reaction pipe. The method has the effect of reducing the safety risk.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical production, in particular to a safe reaction device for continuous chlorination of trifluoromethylaniline. Background Art

[0002] 2,6-Dichloro-4-trifluoromethylaniline is a widely used intermediate in pesticides, pharmaceuticals, and new materials, and is a downstream product of p-trifluoromethylaniline. It can be used to synthesize pesticides such as fipronil, ethiprole, fluvalinate, and flubendiamide. In pharmaceuticals, it can be used to synthesize drugs for treating HIV infection and various veterinary drugs. In new materials, it can be used to synthesize conductive polymers. The direct chlorination of p-trifluoromethylaniline is commonly used to synthesize 2,6-dichloro-4-trifluoromethylaniline.

[0003] The synthesis of 2,6-dichloro-4-trifluoromethylaniline in the existing technology is carried out in a traditional batch reactor. However, the direct chlorination of trifluoromethylaniline to synthesize 2,6-dichloro-4-trifluoromethylaniline is a typical chlorination reaction and a high-risk process that requires key monitoring. The transmission tank reactor has a large reaction volume in a single reaction. Once problems such as feeding errors, pipeline leakage, rapid temperature rise, and maintenance fire occur, serious accidents such as large-scale explosions and large-scale fires may occur, posing a large safety risk. Summary of the Invention

[0004] In order to reduce safety risks, the present application provides a safe reaction device for continuous chlorination of trifluoromethylaniline.

[0005] The present application provides a safe reaction device for continuous chlorination of trifluoromethylaniline using the following technical solution: A safe reaction device for continuous chlorination of trifluoromethylaniline comprises a reaction tank and a plurality of reaction tubes. The reaction tank is provided with a raw material chamber, a temperature control chamber and a collection chamber. The reaction tubes are arranged in the reaction tank and communicate with the raw material chamber and the collection chamber. The reaction tank is provided with an air inlet pipe communicating with the temperature control chamber. The air inlet pipe is provided with an air inlet branch pipe, and the air inlet branch pipe is connected to the reaction tubes.

[0006] By adopting the above technical solution, the p-trifluoromethylaniline raw material and the catalyst are added to the raw material chamber and then enter the reaction tube. At the same time, the chlorine supply device is connected through the air inlet pipe, and chlorine is added to the reaction tube through the air inlet branch pipe to perform a continuous chlorination reaction. A microchannel reaction structure is formed by multiple reaction tubes, thereby reducing the reaction scale, increasing the number of reactions, reducing the amount of each reaction, and thus reducing the possibility of safety accidents, and also reducing the scale and severity of safety accidents, thereby reducing safety risks.

[0007] Preferably, the reaction tube includes a first pipe and a second pipe, the first pipe is connected to the raw material chamber, the first pipe is provided with a first valve to control the opening and closing of the first pipe, the first pipe is inserted into the second pipe, a first stirring rod is rotatably provided in the second pipe, and the reaction tank is provided with a driving assembly, the driving assembly is used to drive the first stirring rod to rotate, and the driving assembly includes a driving motor to provide driving force.

[0008] By adopting the above technical solution, the reaction tube of the microchannel reactor is generally relatively narrow. During the chlorination process of trifluoromethylaniline, the generated hydrogen chloride reacts with trifluoromethylaniline to form a salt. The generated amine salt is insoluble in the reaction system and easily clogs the reaction tube. In the present application, the second channel is relatively thick. The reaction channel is formed by the area between the first stirring rod and the inner wall of the second channel. The raw material enters the second channel through the first channel. At the same time, the first stirring rod is driven by the driving component to rotate in the second channel for stirring. On the one hand, the mixing effect of chlorine and trifluoromethylaniline is improved, thereby improving the reaction effect. On the other hand, the possibility of amine salt clogging the reaction channel is reduced, thereby ensuring the normal progress of the reaction.

[0009] Preferably, the first stirring rod is hollow and sleeved on the first pipe, and the first stirring rod is provided with a first discharge trough, and a guide block is provided in the first discharge trough.

[0010] By adopting the above technical solution, the first stirring rod is sleeved in the first pipe and the raw materials in the first pipe are discharged into the second pipe through the first discharge trough and the guide block, thereby increasing the coverage area of ​​the first stirring rod and further improving the stirring effect.

[0011] Preferably, the drive assembly further includes a first drive gear and a second drive gear, the reaction tank is provided with a drive chamber, the drive motor is arranged in the drive chamber, the first drive gear and the second drive gear are meshed with each other and both rotate in the drive chamber, the first drive gear is connected to the drive motor shaft, and the first stirring rod extends out of the second pipe and is connected to the second drive gear.

[0012] By adopting the above technical solution, the drive motor is started to drive the first drive gear to rotate in the drive cavity, and the second drive gears are driven to rotate through engagement, thereby driving the first stirring rods to rotate. The operation is simple and convenient, and it is easy to use.

[0013] Preferably, a second stirring rod is provided in the raw material chamber, and the driving motor shaft is connected to the second stirring rod.

[0014] By adopting the above technical solution, after the driving motor is started, it synchronously drives the second stirring rod to rotate in the raw material chamber, thereby stirring the trifluoromethylaniline raw material and catalyst, improving the distribution effect of the catalyst, and thus improving the catalytic effect of the reaction.

[0015] Preferably, an auxiliary tube is provided on the first stirring rod, and the auxiliary tube is rotatably arranged in the second pipe. The auxiliary tube is provided with a second discharge trough connected to the first discharge trough, and the auxiliary tube is provided with a plurality of cleaning rods that can fit the inner wall of the second pipe. The first stirring rod is provided with a moving component, and the moving component is used to drive the auxiliary tube to move up and down.

[0016] By adopting the above technical solution, the cleaning rod rotates with the first stirring rod to improve the stirring effect on the one hand, and on the other hand, the cleaning rod presses against the inner wall of the second pipe and cooperates with the moving component to drive the auxiliary pipe up and down to clean the amine salt and other reaction products adhering to the inner wall of the second pipe, thereby improving the cleanliness of the second pipe.

[0017] Preferably, the guide block passes through the second discharge chute.

[0018] By adopting the above technical solution, the guide block passes through the second discharge chute to reduce the possibility of raw materials penetrating between the auxiliary pipe and the first stirring rod, thereby improving the sealing effect.

[0019] Preferably, the auxiliary pipe is sleeved on the first stirring rod and is threadedly connected to the first stirring rod, and the moving assembly includes a moving ring block, a moving cylinder and a moving plug block, the moving ring block is arranged in the second pipeline and above the air inlet branch pipe and the first discharge trough, the auxiliary pipe and the first stirring rod both rotate through the moving ring block, the inner wall of the moving ring block is provided with a mounting groove, the moving cylinder is provided in the mounting groove, the moving plug block is provided on the piston rod of the moving cylinder, the outer wall of the auxiliary pipe is provided with a communicating moving ring groove and a moving card groove, the moving plug block is inserted into the moving ring groove and can move in the moving ring groove, and the moving plug block can be inserted into the moving card groove and move in the moving card groove.

[0020] By adopting the above technical solution, when the auxiliary tube does not move up and down, the movable plug is inserted into the movable ring groove. At this time, the first stirring rod is rotated, and the friction force of the threaded connection drives the auxiliary tube to rotate, so that the movable plug moves in the movable ring groove. When cleaning the inner wall of the second pipe, the movable cylinder is started to drive the movable plug to move out of the movable ring groove and insert into the movable card slot. At this time, the inner wall of the movable card slot clamps the movable plug so that the auxiliary tube cannot rotate. When the first stirring rod continues to rotate, it drives the auxiliary tube up and down through the threaded connection until the movable plug moves and is inserted into the movable ring groove. At this time, the rotation of the first stirring rod drives the auxiliary tube to start rotating again, thereby increasing the moving range and cleaning range of the auxiliary tube, and the operation is simple and convenient.

[0021] Preferably, the reaction tank is provided with a controller, which is connected to the drive motor and the moving cylinder signal, and the moving plug is provided with a distance sensor connected to the controller signal, and the distance sensor is used to measure the distance between the moving plug and the inner wall of the installation groove to calculate the distance moved by the moving plug, and the controller is used to control the opening and closing of the drive motor and the moving cylinder according to the measurement results of the distance sensor.

[0022] By adopting the above technical solution, when in use, the controller starts the moving motor so that the moving plug is inserted into the moving slot and disengaged from the moving ring groove. Through monitoring by the distance sensor, when the moving plug moves to the bottom of the moving slot, the controller turns off the moving cylinder and starts the drive motor to drive the first stirring rod to rotate, thereby completing the movement of the auxiliary tube, simplifying the operation and improving the convenience of use.

[0023] Preferably, the outer wall of the auxiliary tube is provided with a reset slot communicating with the movable ring groove, the movable slot and the reset slot are arranged on the upper and lower sides of the movable ring groove, the length of the movable slot is consistent with the thickness of the cleaning rod, and the length of the reset slot is consistent with the distance between two adjacent groups of cleaning rods.

[0024] By adopting the above technical solution, the length of the movable slot is consistent with the thickness of the cleaning rod, so that the distance the auxiliary tube moves up and down each time is consistent with the thickness of the cleaning rod, so that the cleaning area can cover the lower part of the second pipe. At the same time, when the auxiliary tube moves down the distance consistent with the distance between the two adjacent cleaning rods, the cleaning area has covered the lower part of the second pipe, and the cleaning is completed. The movable plug is inserted into the reset slot and moved to the top. When the drive motor is reversed, the auxiliary tube can be driven to move up and reset. The length of the reset slot is consistent with the distance between the cleaning rods, and the reset can be completed in one time, which improves the convenience of use.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. By arranging a reaction tank, a reaction tube, a raw material chamber, a temperature control chamber, a collection chamber, an air inlet pipe, and an air inlet branch pipe, a p-trifluoromethylaniline raw material and a catalyst are added to the raw material chamber to mix into raw materials, the raw materials enter the reaction tube in the temperature control chamber, and chlorine in a chlorine supply device is added to the reaction tube through the air inlet pipe and the air inlet branch pipe to perform a continuous chlorination reaction. The reaction is carried out in the reaction tube, forming a microchannel reaction structure, reducing the reaction scale, thereby reducing the possibility of safety accidents, and also reducing the scale and severity of safety accidents, thereby reducing safety risks; 2. By providing a first pipe, a second pipe, a first stirring rod, and a drive assembly, the raw material enters the second pipe from the first pipe, and the drive assembly can drive the first stirring rod to rotate in the second pipe. This improves the mixing effect of chlorine and trifluoromethylaniline and the reaction effect, and reduces the possibility of amine salt byproducts accumulating and blocking the reaction channel, thereby ensuring the normal progress of the reaction. 3. By setting the first discharge trough, the second discharge trough, the guide block, the auxiliary pipe, the cleaning rod and the moving assembly, the raw materials in the first pipe flow out from the first discharge trough and the second discharge trough under the guidance of the guide block into the gap between the auxiliary pipe and the second pipe. The auxiliary pipe rotates with the first stirring rod, and the stirring effect is actively improved by the cleaning rod. At the same time, the cleaning rod can clean the inner wall of the second pipe, and cooperate with the moving assembly to drive the auxiliary pipe to move up and down, thereby increasing the cleaning range, facilitating use, and further reducing the possibility of blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is an overall schematic diagram of a safe reaction device for continuous chlorination of trifluoromethylaniline provided in an embodiment of the present application.

[0027] Figure 2 It is a cross-sectional view used to reflect the internal structure of the lower part of the reaction tank.

[0028] Figure 3 yes Figure 2 Magnified view of area A in center.

[0029] Figure 4 It is a cross-sectional view used to show the internal structure of the upper part of the reaction tank.

[0030] Figure 5 yes Figure 4 Magnified view of area B.

[0031] Figure 6 This is a control block diagram of a safe reaction device for continuous chlorination of trifluoromethylaniline provided in an embodiment of the present application.

[0032] Explanation of the accompanying drawings: 1. reaction tank; 11. raw material chamber; 111. raw material pipeline; 112. second stirring rod; 12. temperature control chamber; 121. cooling pipeline; 122. air inlet pipe; 123. air inlet branch pipe; 13. collecting chamber; 131. discharge pipeline; 14. driving chamber; 2. reaction tube; 21. first pipeline; 211. first valve; 22. second pipeline; 3. first stirring rod; 31. first discharge trough; 32. guide block; 33. auxiliary pipe; 331. cleaning rod; 332. second discharge trough; 333. moving ring groove; 334. moving card slot; 335. reset card slot; 4. driving assembly; 41. driving motor; 42. first driving gear; 43. second driving gear; 5. moving assembly; 51. moving ring block; 511. mounting groove; 52. moving cylinder; 53. moving plug block; 531. distance sensor; 6. controller. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-6 This application is described in further detail.

[0034] The present invention discloses a safe reaction device for the continuous chlorination of trifluoromethylaniline. Figures 1 to 4 The invention comprises a reaction tank 1 and a plurality of reaction tanks 1. The reaction tank 1 is provided with a raw material chamber 11, a temperature control chamber 12 and a collection chamber 13 from top to bottom. The reaction tube 2 is provided in the reaction tank 1 and connects the raw material chamber 11 and the collection chamber 13. The reaction tank 1 is provided with a plurality of raw material pipelines 111 communicating with the raw material chamber 11 for adding raw materials such as trifluoromethylaniline raw material and catalyst, and a valve is provided to control the opening and closing of the raw material pipelines 111. The reaction tank 1 is also provided with a cooling pipeline 121 communicating with the temperature control chamber 12 for adding cooling water to cover the lower part of the reaction tube 2 to control the temperature of the lower part of the reaction tube 2 for condensation, and a valve is provided to control the opening and closing of the cooling pipeline 121. The reaction tank 1 is also provided with a discharge pipeline 131 communicating with the collection chamber 13 for discharging, and a valve is provided to control the opening and closing of the discharge pipeline 131. Reactor 1 is equipped with an air inlet pipe 122 communicating with temperature-controlled chamber 12. Within chamber 12 are several air inlet branches 123 communicating with reaction tubes 2. These branches 123 are connected to air inlet pipe 122. Air inlet pipe 122 is directly connected to a chlorine supply device, which controls the chlorine supply. Multiple reaction tubes 2 form a microchannel reaction structure, reducing the scale of each reaction, thereby lowering the likelihood of safety accidents, as well as the scale and severity of such accidents and minimizing safety risks.

[0035] To reduce the probability of congestion, refer to Figure 2 and Figure 3 The reaction tube 2 comprises a first conduit 21 and a second conduit 22. The first conduit 21 connects to the raw material chamber 11 and is equipped with a first valve 211 for on / off control. The detailed structure of the valves, including the first valve 211, is illustrated in detail in the figure. The second conduit 22 passes through the temperature-controlled chamber 12 and connects to the collection chamber 13, which is also connected to the air inlet branch 123. The first conduit 21 is inserted into the second conduit 22. A first stirring rod 3 with a circular cross-section is rotatably mounted within the second conduit 22. The hollow portion of the first stirring rod 3 is inserted into the first conduit 21 and extends out from the top of the second conduit 22. A first discharge chute 31 is provided on the outer wall of the inner portion of the second conduit 22, communicating with the interior. The first discharge chute 31 is located below the air inlet branch 123. A guide block 32 is fixedly mounted on the first stirring rod 3. The guide block 32 extends through the first discharge chute 31 and closes the hollow portion of the first stirring rod 3 below the first discharge chute 31. The surface of the guide block 32 is inclined downward from the center. The reaction tank 1 is equipped with a drive assembly 4 to drive the first stirring rod 3 to rotate. The driving assembly 4 drives the first stirring rod 3 to rotate, thereby stirring the raw materials and chlorine in the second pipe 22, improving the mixing effect of chlorine and trifluoromethylaniline, improving the reaction effect, and reducing the possibility of amine salt blocking the reaction channel, thereby ensuring the normal progress of the reaction.

[0036] For ease of use, refer to Figure 2 and Figure 4 The drive assembly 4 includes a drive motor 41, a first drive gear 42, and a second drive gear 43. The reaction tank 1 is provided with a drive chamber 14 between the raw material chamber 11 and the temperature control chamber 12. The drive motor 41 is disposed in the drive chamber 14. The first drive gear 42 and the second drive gear 43 mesh with each other and both rotate in the drive chamber 14. The first drive gear 42 is coaxially fixedly connected to the rotating shaft of the drive motor 41. The first stirring rod 3 is inserted into the drive chamber 14 and coaxially fixedly connected to the second drive gear 43. When the drive motor 41 is started, the first drive gear 42 rotates. The meshing of the second drive gear 43 drives the first stirring rods 3 to rotate for stirring. The operation is simple and convenient, and the use is convenient.

[0037] In order to save energy and reduce consumption, refer to Figure 4 A second stirring rod 112 is rotatably mounted within the raw material chamber 11. The shaft of the drive motor 41 is coaxially and fixedly connected to the second stirring rod 112. The second stirring rod 112 is provided with a plurality of supporting rods for assisting stirring. The bottom of the second stirring rod 112 is sealed from the bottom of the raw material chamber 11. When the drive motor 41 is activated, it drives the second stirring rod 112 to rotate, thereby stirring the raw materials within the raw material chamber 11. This saves drive components and reduces energy consumption.

[0038] For easy cleaning, refer to Figure 3 and Figure 5 The first stirring rod 3 is equipped with an auxiliary tube 33, which is threadedly connected to the first stirring rod 3. The threaded section is arranged at the lower part of the first discharge trough 31, and the threaded part is not drawn in the figure. The auxiliary tube 33 is arranged in the second pipe 22, and the outer wall of the auxiliary tube 33 is provided with a second discharge trough 332 that communicates with the interior. The first discharge trough 31 is connected to the second discharge trough 332, and the guide block 32 is adapted to pass through the second discharge trough 332. Several cleaning rods 331 that fit the inner wall of the second pipe 22 are fixedly provided on the outer wall of the auxiliary tube 33. The first stirring rod 3 is provided with a moving component 5 for driving the auxiliary tube 33 to move up and down. The first stirring rod 3 drives the auxiliary tube 33 to rotate, and the cleaning rod 331 cleans the inner wall of the second pipe 22 while stirring, which is simple and convenient to operate.

[0039] For ease of use, refer to Figure 4 and Figure 5The moving assembly 5 includes a moving ring block 51, a moving cylinder 52 and a moving insert block 53. The moving ring block 51 is fixedly arranged in the second pipe 22 and is arranged above the air intake branch pipe 123 and the first discharge trough 31. The first pipe 21, the first stirring rod 3 and the auxiliary pipe 33 all pass through the moving ring block 51. The auxiliary pipe 33 is adapted to rotate through the moving ring block 51. The inner wall of the moving ring block 51 is provided with a mounting groove 511 along the height direction. The moving cylinder 52 is a multi-stage cylinder and is fixedly arranged on the top wall of the mounting groove 511. The piston rod of the moving cylinder 52 is arranged downward, and the moving insert block 53 is fixedly arranged on the piston rod of the moving cylinder 52. The outer wall of the auxiliary tube 33 is provided with an annular movable groove 333. A movable slot 334 and a reset slot 335 are also provided vertically on the outer wall of the auxiliary tube 33. The movable slot 334 is located below and communicates with the movable slot 333, while the reset slot 335 is located above and communicates with the movable slot 333. The movable insert 53 is inserted into the movable groove 333 and is movable within the movable groove 333. The movable insert 53 can be inserted into and move within either the movable slot 334 or the reset slot 335. When the auxiliary tube 33 needs to be moved, the movable cylinder 52 is activated to insert the movable insert 53 into the movable slot. At this time, the first stirring rod 3 rotates, driving the auxiliary tube 33 downward via the threaded connection, making operation simple and convenient.

[0040] To improve the convenience of use, refer to Figure 5 and Figure 6 The reactor 1 is equipped with a controller 6, which is connected to the drive motor 41 and the movable cylinder 52. A distance sensor 531 is fixedly mounted on the side of the movable insert 53 away from the auxiliary tube 33 to measure the distance between the movable insert 53 and the inner wall of the mounting slot 511. The controller 6 is used to control the opening and closing of the movable cylinder 52 based on the measurement results of the distance sensor 531 and the number of rotations of the drive motor 41. The length of the movable slot 334 matches the thickness of the cleaning rod 331, and the length of the reset slot 335 matches the distance between two adjacent sets of cleaning rods 331.

[0041] When cleaning, the controller 6 starts the driving motor 41 to drive the first stirring rod 3 to rotate. At this time, the guide block 32 passes through the second discharge trough 332 and presses against the inner wall of the second discharge trough 332, and cooperates with the thread, so that the first stirring rod 3 drives the auxiliary tube 33 to rotate. When the driving motor 41 rotates the set number of circles, the controller 6 stops the driving motor 41 and starts the moving cylinder 52, so that the moving plug 53 disengages from the moving ring groove 333 and drops to the bottom of the moving card groove 334. After that, the value of the distance sensor 531 is less than the predetermined value. At this time, the controller 6 starts the driving motor 41, and the moving plug 53 is stuck to the inner wall of the moving card groove 334, so that the auxiliary tube 33 cannot rotate. The first stirring rod 3 rotates and drives the auxiliary tube 33 to drop the distance of the thickness of the cleaning rod 331 through the thread, until the moving plug 53 moves into the moving ring groove 333 in the moving slot. At this time, the first stirring rod 3 continues to rotate, so that the moving plug 53 rotates in the moving ring groove 333, so that the auxiliary tube 33 rotates for cleaning. The auxiliary tube 33 is continuously cleaned, lowered, and then cleaned again to complete the cleaning of the second auxiliary tube 33. After cleaning, the controller 6 starts the moving cylinder 52 to drive the moving plug 53 to move to the top of the reset slot 335. The distance sensor 531 shows a value greater than the set value. The controller 6 controls the driving motor 41 to reverse and drive the auxiliary tube 33 to rise until the moving plug 53 returns to the moving ring groove 333, completing the reset. The operation is simple and convenient.

[0042] The safe reaction device for the continuous chlorination of trifluoromethylaniline according to the present embodiment is implemented as follows: raw materials and catalysts enter the raw material chamber 11 through the raw material pipeline 111, and are stirred by the second stirring rod 112 driven by the drive motor 41. The first valve 211 is then opened, allowing the raw materials to enter the second pipeline 22 through the first pipeline 21 and related channels. Simultaneously, a chlorine supply device supplies nitrogen to the pipeline through the air inlet pipe 122 and the air inlet branch pipe 123. Simultaneously, the drive motor 41, through gear engagement, drives the auxiliary pipe 33 to rotate and stir the raw materials through the first stirring rod 3. The finished product enters the collection chamber 13, where it is collected and transported through the discharge pipe 131 to subsequent processing equipment such as gas-liquid separation for subsequent processing. A microchannel reaction structure is formed by the gap between the second pipeline 22 and the auxiliary pipe 33, reducing the reaction scale and the amount of each reaction during the continuous reaction, thereby reducing the possibility of safety accidents, as well as the scale and severity of safety accidents and reducing safety risks.

[0043] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A safe reaction device for continuous chlorination of trifluoromethylaniline, characterized in that: The invention comprises a reaction tank (1) and a plurality of reaction tubes (2), wherein the reaction tank (1) is provided with a raw material chamber (11), a temperature control chamber (12) and a collection chamber (13), the reaction tubes (2) are arranged in the reaction tank (1) and communicate with the raw material chamber (11) and the collection chamber (13), the reaction tank (1) is provided with an air intake pipe (122) communicating with the temperature control chamber (12), the air intake pipe (122) is provided with an air intake branch pipe (123), and the air intake branch pipe (123) is communicated with the reaction tubes (2).

2. A safe reaction device for continuous chlorination of trifluoromethylaniline according to claim 1, characterized in that: The reaction tube (2) comprises a first pipe (21) and a second pipe (22), wherein the first pipe (21) is connected to the raw material chamber (11), and the first pipe (21) is provided with a first valve (211) to control the opening and closing of the first pipe (21), the first pipe (21) is inserted into the second pipe (22), and a first stirring rod (3) is rotatably provided in the second pipe (22), and the reaction tank (1) is provided with a driving assembly (4), wherein the driving assembly (4) is used to drive the first stirring rod (3) to rotate, and the driving assembly (4) comprises a driving motor (41) for providing driving force.

3. A safe reaction device for continuous chlorination of trifluoromethylaniline according to claim 2, characterized in that: The first stirring rod (3) is hollow and sleeved on the first pipe (21). The first stirring rod (3) is provided with a first discharge trough (31), and a guide block (32) is provided in the first discharge trough (31).

4. A safe reaction device for continuous chlorination of trifluoromethylaniline according to claim 3, characterized in that: The driving assembly (4) further comprises a first driving gear (42) and a second driving gear (43); the reaction tank (1) is provided with a driving chamber (14); the driving motor (41) is arranged in the driving chamber (14); the first driving gear (42) and the second driving gear (43) are meshed with each other and are both rotatably arranged in the driving chamber (14); the first driving gear (42) is connected to the rotating shaft of the driving motor (41); the first stirring rod (3) extends out of the second pipe (22) and is connected to the second driving gear (43).

5. A safe reaction device for continuous chlorination of trifluoromethylaniline according to claim 4, characterized in that: A second stirring rod (112) is provided in the raw material chamber (11), and the rotating shaft of the driving motor (41) is connected to the second stirring rod (112).

6. A safe reaction device for continuous chlorination of trifluoromethylaniline according to claim 3, characterized in that: The first stirring rod (3) is provided with an auxiliary tube (33), the auxiliary tube (33) is rotatably arranged in the second pipe (22), the auxiliary tube (33) is provided with a second discharge trough (332) connected to the first discharge trough (31), the auxiliary tube (33) is provided with a plurality of cleaning rods (331) capable of fitting against the inner wall of the second pipe (22), the first stirring rod (3) is provided with a moving assembly (5), and the moving assembly (5) is used to drive the auxiliary tube (33) to move up and down.

7. A safe reaction device for continuous chlorination of trifluoromethylaniline according to claim 6, characterized in that: The guide block (32) passes through the second discharge chute (332).

8. A safe reaction device for continuous chlorination of trifluoromethylaniline according to claim 6, characterized in that: The auxiliary pipe (33) is sleeved on the first stirring rod (3) and is threadedly connected to the first stirring rod (3). The moving assembly (5) includes a moving ring block (51), a moving cylinder (52) and a moving plug block (53). The moving ring block (51) is arranged in the second pipeline (22) and above the air inlet branch pipe (123) and the first discharge trough (31). The auxiliary pipe (33) and the first stirring rod (3) are rotated to pass through the moving ring block (51). The inner wall of the moving ring block (51) is provided with a mounting The movable cylinder (52) is arranged in the mounting groove (511), the movable insert block (53) is arranged on the piston rod of the movable cylinder (52), the outer wall of the auxiliary tube (33) is provided with a movable annular groove (333) and a movable clamping groove (334) which are in communication with each other, the movable insert block (53) is inserted into the movable annular groove (333) and can move in the movable annular groove (333), and the movable insert block (53) can be inserted into the movable clamping groove (334) and move in the movable clamping groove (334).

9. A safe reaction device for continuous chlorination of trifluoromethylaniline according to claim 8, characterized in that: The reaction tank (1) is provided with a controller (6), the controller (6) is connected to the drive motor (41) and the movable cylinder (52) by signal, the movable plug-in block (53) is provided with a distance sensor (531) connected to the controller (6) by signal, the distance sensor (531) is used to measure the distance between the movable plug-in block (53) and the inner wall of the installation groove (511) to calculate the distance moved by the movable plug-in block (53), and the controller (6) is used to control the opening and closing of the movable cylinder (52) according to the measurement result of the distance sensor (531) and the number of rotations of the drive motor (41).

10. A safe reaction device for continuous chlorination of trifluoromethylaniline according to claim 8, characterized in that: The outer wall of the auxiliary tube (33) is provided with a reset slot (335) communicating with the movable ring groove (333); the movable slot (334) and the reset slot (335) are provided on the upper and lower sides of the movable ring groove (333); the length of the movable slot (334) is consistent with the thickness of the cleaning rod (331); the length of the reset slot (335) is consistent with the distance between two adjacent groups of cleaning rods (331).

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