Reaction kettle with impurity removal function and aminomethylbenzoic acid impurity removal method

Abstract

The invention relates to the technical field of reaction kettles, in particular to a reaction kettle with an impurity removal function and an aminomethylbenzoic acid impurity removal method. Comprising a reaction kettle and the like. By circulating the solution, insoluble impurities in the solution are filtered, so that additional filtering operation is avoided, and the complexity of impurity removal work is reduced; a small amount of crystals are washed each time, so that all crystals can be washed, the situation that part of crystals cannot be washed is avoided, washing equipment cannot be additionally purchased in the washing mode, and the production cost of enterprises is saved; the crushing part extrudes agglomerated crystals, so that the crystals are crushed into normal crystals, subsequent crushing work is avoided, the workload of impurity removal treatment is reduced, and the production speed is increased; the material pushing block pushes the crystals to move, so that the discharging speed of the crystals is increased, the attached crystals can be pushed at the moment, and the conditions of blockage and the like are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of reactors, in particular to a reactor with an impurity removal function and an aminomethylbenzoic acid impurity removal method. Background Art

[0002] Various impurities may be introduced into aminobenzoic acid during the synthesis process, which will affect the purity, stability and application performance of the product. Therefore, aminobenzoic acid needs to be impurity-removed to ensure that it meets industry standards and customer needs. Through reasonable impurity removal methods and technologies, impurities can be effectively removed to ensure the quality of the final product. The solvent and aminobenzoic acid are placed in a reactor and mixed and stirred to dissolve the impurities in the aminobenzoic acid in the solvent, and the aminobenzoic acid and the solvent are melted into a liquid. However, the dissolved liquid at this time will contain insoluble impurities such as dust particles. After the subsequent liquid is cooled and crystallized, the crystals need to be filtered. At this time, the insoluble impurities will accumulate in the crystals, resulting in impurities in the crystals after production, affecting the production quality. Summary of the invention

[0003] In order to overcome the disadvantage that insoluble impurities will accumulate in crystals, resulting in impurities in the crystals after production, which affects the production quality, the present invention provides a reaction kettle with impurity removal function and an aminomethylbenzoic acid impurity removal method.

[0004] The technical scheme of the present invention is: a reactor with impurity removal function, including a reactor; also including a discharge pipe, a filter screen, an electric push rod 1, a lifting block, a fixed block, a blocking block, an electric push rod 2, a connecting frame, a liquid inlet pipe, an electric control valve and a liquid suction component; the reactor is connected with a discharge pipe; an electric control valve is fixedly connected to the upper and lower parts of the discharge pipe; a filter mechanism is connected inside the discharge pipe, the filter mechanism consists of a fixed frame and a filter screen, the fixed frame is fixedly connected to the discharge pipe; the fixed frame is fixedly connected to the filter screen; at least four electric push rods 1 are fixedly connected to the discharge pipe; the telescopic parts of all the electric push rods 1 are fixedly connected to the lifting block; the inner side of the lifting block Contact with the fixed frame; a fixed block is fixedly connected in the discharge pipe; at least four electric push rods 2 are fixedly connected to the discharge pipe; the telescopic parts of all the electric push rods 2 are commonly fixedly connected to a connecting frame; the connecting frame is connected with a blocking block, and the lower part of the blocking block is tightly attached to the fixed block; the fixed block is provided with a liquid inlet cavity; the fixed block is provided with a plurality of eight liquid outlet holes; all the liquid outlet holes are commonly connected with the liquid inlet cavity; the liquid inlet cavity of the fixed block is connected with a liquid inlet pipe; the filter is located above the fixed block, and the filter, the fixed block and the blocking block are all located between two electric control valves; the electric push rod 1, the electric push rod 2 and the electric control valve are respectively connected to an external power supply; the discharge pipe is connected with a liquid suction component.

[0005] Furthermore, the liquid suction component includes a liquid suction pipe, a water pump and a connecting pipe; the discharge pipe is connected to the liquid suction pipe; the liquid suction pipe is located above the lower electric control valve; the liquid suction pipe is connected to the water pump; the water pump outlet is connected to the connecting pipe; the connecting pipe outlet is located at the lower side of the reactor; the water pump is connected to an external power supply.

[0006] Furthermore, the filter is convex.

[0007] Furthermore, it also includes a liquid outlet pipe and an electrically controlled three-way valve; the connecting pipe is connected to the liquid outlet pipe; the electrically controlled three-way valve is fixedly connected between the connecting pipe and the liquid outlet pipe; and the electrically controlled three-way valve is connected to an external power supply.

[0008] Furthermore, the blocking block is provided with a crushing portion, and there is a crushing space between the crushing portion and the fixing block.

[0009] Furthermore, the contact area between the blocking block and the fixing block is made of silicone material.

[0010] Furthermore, it also includes a motor and a pusher block; the lifting block is fixedly connected to the motor; the motor output shaft is fixedly connected to the fixed block; and at least four pushers are fixedly connected to the crushing part of the blocking block.

[0011] Furthermore, it also includes a stirring plate; at least six stirring plates are fixedly connected to the upper part of the blocking block.

[0012] Furthermore, it also includes a connecting rod and a cleaning plate; the upper part of the blocking block is fixedly connected to the connecting rod; the connecting rod passes through the filter; the connecting rod is fixedly connected to at least four cleaning plates; the cleaning plate is located on the upper side of the filter; and the cleaning plate is in contact with the upper side of the filter.

[0013] Furthermore, a method for removing impurities from aminomethylbenzoic acid is provided, and the specific steps are as follows: Step 1: Aminomethylbenzoic acid and a solvent are respectively discharged into a shell, and then the aminomethylbenzoic acid and the solvent are stirred and cooled by rotating an electric stirring rod, so that the aminomethylbenzoic acid and the solvent are fused together, and the aminomethylbenzoic acid in the solution forms crystals, and the crystallized aminomethylbenzoic acid is in a state of complete impurity removal; Step 2: After heating, the insoluble impurities in the solution are filtered out by circulating the solution, thereby avoiding the need for additional filtering operations and reducing the complexity of impurity removal; Step 3: The solution is separated from the crystals by a filter screen, and then the crystals are intercepted by a fixed block and a blocking block, and then the crystals are washed by a detergent; Step 4: The blocking block is repeatedly moved up and down, so that the crushing part crushes the crystals in agglomerate state, thereby avoiding the need for subsequent crushing work, thereby reducing the workload of impurity removal and speeding up production.

[0014] Step 5: During cooling, the solution is circulated so that the partially formed crystals can be filtered out during the cooling and precipitation process to avoid agglomeration of a large number of crystals and speed up the overall work efficiency. Beneficial Effects

[0015] By circulating the solution, insoluble impurities in the solution are filtered out, thereby avoiding the need for additional filtration operations and reducing the complexity of impurity removal work.

[0016] By washing a small amount of crystals each time, it is ensured that all crystals can be washed, avoiding the situation where some crystals cannot be washed. This washing method does not require the purchase of additional washing equipment, thus saving the company's production costs.

[0017] The crushing section squeezes the agglomerated crystals and breaks them into normal crystal size, thus avoiding the need for subsequent crushing, reducing the workload of impurity removal and speeding up production.

[0018] The push block will push the crystals to move, thereby speeding up the discharge of the crystals. When the crystals are squeezed and crushed, they may adhere to the fixed block, making it impossible to discharge them. Therefore, the attached crystals can be pushed at this time to avoid blockages.

[0019] When the crystals are cooled, some of the crystals are first filtered, and then the filtered crystals are washed and crushed, so as to avoid the formation of lumps due to the inability to quickly discharge the crystals after precipitation. The crystals can be filtered, washed and crushed during the cooling process, so that the impurity removal efficiency of aminobenzoic acid is accelerated. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure disclosed by the reaction kettle with impurity removal function of the present invention; Figure 2 It is a structural cross-sectional view of the shell and the discharge pipe of the reactor with impurity removal function of the present invention; Figure 3 It is a schematic diagram of the structure of the liquid suction pipe, water pump, liquid outlet pipe, electric-controlled three-way valve and connecting pipe disclosed in the reaction kettle with impurity removal function of the present invention; Figure 4 It is a schematic diagram of the structure of the electric push rod 1, the lifting block, the fixing block and the blocking block disclosed by the reactor with impurity removal function of the present invention; Figure 5 The present invention is a schematic structural diagram of a motor, a pusher block and a stirring plate disclosed in a reaction kettle with impurity removal function.

[0021] The names and serial numbers of the parts in the figure are: 1-housing, 2-feeding pipe, 3-electric stirring rod, 4-discharge pipe, 5-filter, 6-electric push rod one, 7-lifting block, 8-fixed block, 9-blocking block, 10-electric push rod two, 11-connecting frame, 12-liquid inlet pipe, 13-electrically controlled valve, 101-motor, 102-push block, 103-stirring plate, 111-connecting rod, 112-cleaning plate, 201-liquid suction pipe, 202-water pump, 203-liquid outlet pipe, 211-electrically controlled three-way valve, 212-connecting pipe, 8001-liquid inlet cavity, 8002-liquid outlet hole, 9001-crushing part. DETAILED DESCRIPTION

[0022] The preferred technical solutions of the present invention are described in detail below with reference to the accompanying drawings. Example

[0023] A reactor with impurity removal function Figure 2-Figure 5 As shown, a reaction kettle is included; the reaction kettle is composed of a shell 1, a feed pipe 2 and an electric stirring rod 3; a feed pipe 2 is connected to the upper left side and the upper right side of the shell 1; the shell 1 is fixedly connected to the electric stirring rod 3; a cooling device is provided outside the shell 1; the electric stirring rod 3 is connected to an external power supply; It also includes a discharge pipe 4, a filter screen 5, an electric push rod 1 6, a lifting block 7, a fixed block 8, a blocking block 9, an electric push rod 2 10, a connecting frame 11, a liquid inlet pipe 12, an electric control valve 13 and a liquid suction component; the lower part of the shell 1 is connected to the discharge pipe 4; the upper and lower parts of the discharge pipe 4 are each fixedly connected to an electric control valve 13; the discharge pipe 4 is internally connected to a filtering mechanism, which consists of a fixed frame and a filter screen 5, and the fixed frame is fixedly connected to the discharge pipe 4; the fixed frame is fixedly connected to the filter screen 5; four electric push rods 1 6 are fixedly connected to the discharge pipe 4; the telescopic parts of all the electric push rods 1 6 are commonly fixedly connected to a lifting block 7; the inner side of the lifting block 7 is in contact with the fixed frame, and the space except the filter screen 5 is blocked by the lifting block 7 and the fixed frame, so that the solution can only flow down after passing through the filter screen 5; The fixed block 8; the discharge pipe 4 is fixedly connected with four electric push rods 2 10; the telescopic parts of all the electric push rods 2 10 are commonly fixedly connected with a connecting frame 11; the connecting frame 11 is connected with a blocking block 9, and the lower part of the blocking block 9 is in close contact with the fixed block 8; the fixed block 8 is provided with a liquid inlet cavity 8001; the fixed block 8 is provided with a plurality of eight liquid outlet holes 8002; all the liquid outlet holes 8002 are commonly connected with the liquid inlet cavity 8001; the liquid inlet cavity 8001 of the fixed block 8 is connected with a liquid inlet pipe 12; the filter screen 5 is located above the fixed block 8, and the filter screen 5, the fixed block 8 and the blocking block 9 are all located between two electrically controlled valves 13; the electric push rod 1 6, the electric push rod 2 10 and the electrically controlled valve 13 are respectively connected with an external power supply; the discharge pipe 4 is connected with a liquid suction component, and the filtered solution is sucked away by the liquid suction component.

[0024] The liquid suction component includes a liquid suction pipe 201, a water pump 202 and a connecting pipe 212; the discharge pipe 4 is connected to the liquid suction pipe 201; the liquid suction pipe 201 is located above the lower electric control valve 13; the liquid suction pipe 201 is connected to the water pump 202; the water outlet of the water pump 202 is connected to the connecting pipe 212; the outlet of the connecting pipe 212 is located in the shell 1; the water pump 202 is connected to an external power supply.

[0025] The filter screen 5 is convex, so that the crystals are easily discharged to the outside of the filter screen 5, thereby accelerating the discharge speed and avoiding clogging in the middle of the filter screen 5.

[0026] The specific working steps are: The left and right feed pipes 2 are connected to external feeding devices respectively, and the two external feeding devices respectively transport the solvent and aminomethylbenzoic acid. The external collecting device is connected to the discharge pipe 4, and the liquid inlet pipe 12 is connected to the external water supply device.

[0027] When it is necessary to remove impurities from aminobenzoic acid, firstly, aminobenzoic acid and the solvent are respectively discharged to the feed pipe 2 through the external feeding device, and then discharged into the shell 1 through the feed pipe 2, and then the electric stirring rod 3 is turned on to rotate the electric stirring rod 3 to stir the aminobenzoic acid and the solvent. When the stirring is completed, the aminobenzoic acid and the solvent will be fused together, and then the external cooling device on the shell 1 will cool the mixed solution in the shell 1, so that the aminobenzoic acid in the solution forms crystals, and in the process of cooling the dissolved aminobenzoic acid, the upper electric control valve 13 is opened, The solution is discharged into the discharge pipe 4, and the electric push rod 10 drives the blocking block 9 to rise through the connecting frame 11, so that the blocking block 9 is no longer in contact with the fixed block 8, so that the solution is discharged to the electric control valve 13 below which is in a closed state, and then the water pump 202 is turned on to make the water pump 202 suck out the solution in the discharge pipe 4 through the suction pipe 201, so that the solution will be discharged into the connecting pipe 212, and then discharged into the housing 1 through the connecting pipe 212, so that the solution is in a circulating state, and when the solution is circulating, the insoluble impurities in the solution will be intercepted by the filter 5, thereby separating the insoluble impurities from the solution. After the separation is completed, the upper electric control valve 13 is closed to prevent the solution from being discharged into the discharge pipe 4 again, and then the solution is cooled, and then the blocking block 9 is lowered and closely attached to the fixed block 8, and then the lifting block 7 is controlled to be lowered to separate the lifting block 7 from the fixed frame. Since the filter screen 5 is convex, the insoluble impurities will flow to the outside of the filter screen 5. At this time, the insoluble impurities will fall from the filter screen 5 to the fixed block 8 and the blocking block 9, and then the external water supply equipment supplies water to the liquid inlet pipe 12, so that the water passes through the liquid inlet pipe 12 and the liquid inlet cavity 8001, and finally sprays out from the liquid outlet hole 8002, so that the water The upper part of the discharge pipe 4 is filled with water, so that the water and the insoluble impurities are mixed, and then the blocking block 9 rises and separates from the fixed block 8, so that the insoluble impurities are discharged to the lower part of the discharge pipe 4 together with the detergent. Since the water fills the upper part of the discharge pipe 4, when insoluble impurities remain on the filter screen 5, the water will drive the insoluble impurities to flow away together. At this time, the electric control valve 13 is opened to discharge the insoluble impurities into the external collection device, so that the insoluble impurities in the solution are filtered by circulating the solution, thereby avoiding the need for additional filtering operations and reducing the complexity of impurity removal work. Example

[0028] On the basis of Example 1, Figure 1-5 As shown, it also includes a liquid outlet pipe 203 and an electrically controlled three-way valve 211; the connecting pipe 212 is connected to the liquid outlet pipe 203; the electrically controlled three-way valve 211 is fixedly connected between the connecting pipe 212 and the liquid outlet pipe 203; the electrically controlled three-way valve 211 is connected to an external power supply.

[0029] The blocking block 9 is provided with a crushing portion 9001 , and there is a crushing space between the crushing portion 9001 and the fixing block 8 , and the agglomerated crystals can be crushed through the crushing space.

[0030] The contact area between the blocking block 9 and the fixing block 8 is made of silica gel to prevent the blocking block 9 from crushing crystals of the same size when it moves up and down.

[0031] It also includes a motor 101 and a pusher block 102 ; the lifting block 7 is fixedly connected to the motor 101 ; the output shaft of the motor 101 is fixedly connected to the fixing block 8 ; and four pushers 102 are fixedly connected to the crushing part 9001 of the blocking block 9 .

[0032] It also includes a stirring plate 103 ; six stirring plates 103 are fixedly connected to the upper part of the blocking block 9 .

[0033] It also includes a connecting rod 111 and a cleaning plate 112; the connecting rod 111 is fixedly connected to the upper part of the blocking block 9; the connecting rod 111 passes through the filter 5; the connecting rod 111 is fixedly connected to four cleaning plates 112; the cleaning plates 112 are located on the upper side of the filter 5; and the cleaning plates 112 are in contact with the upper side of the filter 5.

[0034] A method for removing impurities from aminomethylbenzoic acid, comprising the following steps: Step 1: aminomethylbenzoic acid and the solvent are respectively discharged into the housing 1, and then the aminomethylbenzoic acid and the solvent are stirred and cooled by the electric stirring rod 3, so that the aminomethylbenzoic acid and the solvent are fused together, and the aminomethylbenzoic acid in the solution forms crystals, and the crystallized aminomethylbenzoic acid is in a state of impurity removal; Step 2: After heating, the insoluble impurities in the solution are filtered out by circulating the solution, thereby avoiding the need for additional filtering operations and reducing the complexity of impurity removal work; Step 3: Separate the solution from the crystals through the filter 5, then intercept the crystals through the fixing block 8 and the blocking block 9, and then wash the crystals with a detergent; Step 4: By repeatedly moving the blocking block 9 up and down, the crushing part 9001 crushes the crystals in the agglomerated state, thereby avoiding the need for subsequent crushing work, thereby reducing the workload of impurity removal and speeding up production.

[0035] Step 5: During cooling, the solution is circulated so that the partially formed crystals can be filtered out during the cooling and precipitation process to avoid agglomeration of a large number of crystals and speed up the overall work efficiency.

[0036] The specific working steps are: The liquid outlet pipe 203 is connected to an external wastewater collection device.

[0037] Considering that the existing purification operation requires a large number of crystals to be filtered and discharged into the washing equipment for washing, and due to the large number of crystals to be washed, it is easy for some crystals to not be washed, while in the impurity removal process, only simple washing is required, but additional washing equipment is required for special washing work, resulting in increased impurity removal costs. Therefore, when the cooling work is completed, the upper electric control valve 13 is opened to discharge the solution in the housing 1 into the discharge pipe 4, and the electric push rod 10 will drive the blocking block 9 to rise through the connecting frame 11, so that the blocking block 9 is no longer in contact with the fixed block 8, so that the solution is discharged to the electric control valve below which is in a closed state. 13, and then start the water pump 202, so that the water pump 202 sucks out the solution in the discharge pipe 4 through the suction pipe 201, and at the same time control the electric control three-way valve 211, so that the suction pipe 201 and the connecting pipe 212 are no longer connected, and the solution will be discharged from the liquid outlet pipe 203 to the external wastewater collection equipment; and in the process of the solution flowing in the discharge pipe 4, the filter screen 5 will play a filtering role, and the crystals in the solution will be intercepted on the filter screen 5, and when the upper electric control valve 13 is closed and the filtered solution is sucked away, all the crystals are intercepted on the filter screen 5, and then the electric push rod 10 drives the blocking block 9 to descend, so that the blocking block 9 contacts with the fixed block 8, and this At this time, a sealed space will be formed between the fixed block 8 and the upper electric control valve 13, and then the electric push rod 6 will be controlled to drive the lifting block 7 to descend, so that the lifting block 7 is no longer in contact with the filter screen 5, forming a gap. At this time, the crystals will fall from the gap to the fixed block 8, and at the same time, the external water supply equipment connected to the liquid inlet pipe 12 will be removed, so that the external liquid supply equipment is connected to the liquid inlet pipe 12, and then the external liquid supply equipment will supply detergent to the liquid inlet pipe 12, so that the detergent passes through the liquid inlet pipe 12 and the liquid inlet cavity 8001, and finally sprayed out from the liquid outlet 8002. At this time, the detergent will wash the crystals from bottom to top, thereby realizing the washing work of the crystals, and the washing After the work is completed, the lower electric control valve 13 is opened, and then the blocking block 9 is raised away from the fixed block 8, so that the crystals and detergent are discharged from the gap between the blocking block 9 and the fixed block 8, and then discharged into the external collection device, and then the upper electric control valve 13 is opened again to filter the next batch of solution and wash the crystals. This process is repeated until all the crystals in the outer shell 1 are washed. By washing a small amount of crystals each time, it is ensured that all crystals can be washed, avoiding the situation where some crystals cannot be washed. In addition, this washing method does not require the purchase of additional washing equipment, thereby saving the company's production costs.

[0038] Considering that aminomethylbenzoic acid will precipitate at the bottom of the shell 1 after crystallization, this will also cause the crystals to agglomerate, and it may be necessary to crush them after washing so that the size of the crystals meets the production standards. Therefore, when the crystals need to be discharged after washing, the electric push rod 10 will repeatedly drive the blocking block 9 to move up and down, and the maximum distance that the blocking block 9 rises from the fixed block 8 will be smaller than the volume of the agglomerates, so that normal crystals will be discharged from the gap between the fixed block 8 and the blocking block 9, while the agglomerated crystals will be blocked. However, since there is a distance between the crushing part 9001 of the blocking block 9 and the fixed block 8, when the blocking block 9 rises, the distance will increase, causing the agglomerates to enter between the crushing part 9001 and the fixed block 8, and when the blocking block 9 falls, the crushing part 9001 will squeeze the agglomerated crystals, thereby breaking them into normal crystal size, thereby avoiding the need for subsequent crushing work, thereby reducing the workload of impurity removal and speeding up production.

[0039] While the blocking block 9 moves up and down repeatedly, the motor 101 will drive the pushing block 102 to rotate counterclockwise when viewed from a top-down perspective through the blocking block 9, so that the pushing block 102 pushes the crystals to move, thereby accelerating the discharge of the crystals. When the crystals are squeezed and crushed, they may adhere to the fixed block 8, making it impossible to discharge them. Therefore, the attached crystals can be pushed away at this time to avoid blockages and the like.

[0040] When the detergent is sprayed for flushing, the motor 101 will also drive the stirring plate 103 to rotate through the blocking block 9. At this time, the rotation of the stirring plate 103 will stir the detergent, causing the detergent to form a vortex, so that the detergent can be mixed with the crystals more quickly, thereby accelerating the washing speed and ensuring the washing efficiency and washing effect; when the solution is discharged, the motor 101 will drive the connecting rod 111 and the cleaning plate 112 to rotate through the blocking block 9, so that the cleaning plate 112 pushes the crystals to move to the outside of the filter 5, thereby avoiding blockage, and when the crystals are discharged onto the fixed block 8, the cleaning plate 112 can also push the crystals to move to the outside of the filter 5, thereby accelerating the crystal discharge speed.

[0041] Taking into account that in the process of crystallization, due to the long crystallization time, the crystals precipitated first will stick together during the stirring process and then form lumps, so when cooling and precipitating some crystals, the circulation method in Example 1 can be used to first filter some crystals, and then wash and crush the filtered crystals, so as to avoid the formation of lumps due to the inability to quickly discharge the crystals after precipitation, and the crystals can be filtered, washed and crushed during the cooling process, so that the impurity removal efficiency of aminomethylbenzoic acid is accelerated.

[0042] Step 5: During cooling, the solution is circulated so that the partially formed crystals can be filtered out during the cooling and precipitation process to avoid agglomeration of a large number of crystals and speed up the overall work efficiency.

[0043] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A reactor with impurity removal function, comprising a reactor; characterized in that: The invention also comprises a discharge pipe (4), a filter screen (5), an electric push rod one (6), a lifting block (7), a fixed block (8), a blocking block (9), an electric push rod two (10), a connecting frame (11), a liquid inlet pipe (12), an electric control valve (13) and a liquid suction component; the reactor is connected with the discharge pipe (4); the upper part and the lower part of the discharge pipe (4) are each fixedly connected with an electric control valve (13); the discharge pipe (4) is internally connected with a filtering mechanism, the filtering mechanism comprising a fixed frame and a filter screen (5), the fixed frame is fixedly connected to the discharge pipe (4); the fixed frame is fixedly connected to the filter screen (5); the discharge pipe (4) is fixedly connected with at least four electric push rods one (6); the telescopic parts of all the electric push rods one (6) are commonly fixedly connected with a lifting block (7); the inner side of the lifting block (7) is in contact with the fixed frame; the discharge pipe (4) is fixedly connected with a fixed block (8); the discharge pipe (4) is fixedly connected with to At least four electric push rods (10); the telescopic parts of all the electric push rods (10) are fixedly connected to a connecting frame (11); the connecting frame (11) is connected to a blocking block (9), and the lower part of the blocking block (9) is in close contact with the fixed block (8); the fixed block (8) is provided with a liquid inlet cavity (8001); the fixed block (8) is provided with a plurality of eight liquid outlet holes (8002); all the liquid outlet holes (8002) are connected to the liquid inlet cavity (8001); the liquid inlet cavity (8001) of the fixed block (8) is connected to a liquid inlet pipe (12); the filter screen (5) is located above the fixed block (8), and the filter screen (5), the fixed block (8) and the blocking block (9) are all located between two electric control valves (13); the electric push rod (6), the electric push rod (10) and the electric control valve (13) are respectively connected to an external power supply; and the discharge pipe (4) is connected to a liquid suction component.

2. A reactor with impurity removal function according to claim 1, characterized in that: The liquid suction component comprises a liquid suction pipe (201), a water pump (202) and a connecting pipe (212); the discharge pipe (4) is connected to the liquid suction pipe (201); the liquid suction pipe (201) is located above the lower electric control valve (13); the liquid suction pipe (201) is connected to the water pump (202); the water outlet of the water pump (202) is connected to the connecting pipe (212); the discharge port of the connecting pipe (212) is located at the lower side of the reaction kettle; and the water pump (202) is connected to an external power supply.

3. The reactor with impurity removal function according to claim 1, characterized in that: The filter screen (5) is convex.

4. A reactor with impurity removal function according to any one of claims 1 to 3, characterized in that: It also includes a liquid outlet pipe (203) and an electrically controlled three-way valve (211); the connecting pipe (212) is connected to the liquid outlet pipe (203); the electrically controlled three-way valve (211) is fixedly connected between the connecting pipe (212) and the liquid outlet pipe (203); and the electrically controlled three-way valve (211) is connected to an external power supply.

5. The reactor with impurity removal function according to claim 4, characterized in that: The blocking block (9) is provided with a crushing portion (9001), and a crushing space is provided between the crushing portion (9001) and the fixing block (8).

6. The reactor with impurity removal function according to claim 5, characterized in that: The contact area between the blocking block (9) and the fixing block (8) is made of silicone material.

7. The reactor with impurity removal function according to claim 5, characterized in that: It also includes a motor (101) and a pusher block (102); the lifting block (7) is fixedly connected to the motor (101); the output shaft of the motor (101) is fixedly connected to the fixed block (8); and at least four pushers (102) are fixedly connected to the crushing portion (9001) of the blocking block (9).

8. The reactor with impurity removal function according to claim 7, characterized in that: It also includes stirring plates (103); at least six stirring plates (103) are fixedly connected to the upper part of the blocking block (9).

9. The reactor with impurity removal function according to claim 8, characterized in that: It also includes a connecting rod (111) and a cleaning plate (112); the upper part of the blocking block (9) is fixedly connected to the connecting rod (111); the connecting rod (111) passes through the filter screen (5); the connecting rod (111) is fixedly connected to at least four cleaning plates (112); the cleaning plates (112) are located on the upper side of the filter screen (5); and the cleaning plates (112) are in contact with the upper side surface of the filter screen (5).

10. A method for removing impurities from aminomethylbenzoic acid, characterized in that: According to the reaction kettle with impurity removal function according to claim 9, the specific steps are as follows: Step 1: aminomethylbenzoic acid and a solvent are respectively discharged into the housing (1), and then the aminomethylbenzoic acid and the solvent are stirred and cooled by rotating the electric stirring rod (3), so that the aminomethylbenzoic acid and the solvent are fused together, and the aminomethylbenzoic acid in the solution forms crystals, and the crystallized aminomethylbenzoic acid is in a state of being impurity-free; Step 2: After heating, the insoluble impurities in the solution are filtered out by circulating the solution, thereby avoiding the need for additional filtering operations and reducing the complexity of impurity removal work; Step 3: separating the solution from the crystals through the filter (5), then intercepting the crystals through the fixing block (8) and the blocking block (9), and then washing the crystals with a detergent; Step 4: by repeatedly moving the blocking block (9) up and down, the crushing part (9001) crushes the crystals in the agglomerated state, thereby avoiding the need for subsequent crushing work, thereby reducing the workload of impurity removal and speeding up production; Step 5: During cooling, the solution is circulated so that the partially formed crystals can be filtered out during the cooling and precipitation process to avoid agglomeration of a large number of crystals and speed up the overall work efficiency.

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