LC-grade diethyltoluene diamine centrifugal production unit

Abstract

This invention belongs to the field of diethyltoluene diamine production technology, and particularly relates to a centrifugal production device for LC-grade diethyltoluene diamine. It includes a support frame, a reaction vessel fixedly connected to the support frame, a rotating ring rotatably connected inside the reaction vessel, and several fixed cylinders fixedly connected to the rotating ring. Each fixed cylinder is equipped with a scraper for scraping off deposits on the inner wall of the reaction vessel. The scraper is also equipped with a guide plate, and several filter screens are disposed between the scraper and the guide plate. The top and bottom of the reaction vessel are fixedly connected and connected to an inlet pipe and an outlet pipe, respectively. This invention forms a flow channel through the scraper and guide plate, allowing the reaction solution to carry the flocculent material scraped by the scraper into the flow channel. The flocculent material is intercepted by the filter screens, and gradually dissolves under the continuous impact of the reaction solution, ensuring the purity and reaction precision of the diethyltoluene diamine preparation process.

Description

Technical Field

[0001] This invention conforms to the field of diethyltoluene diamine production technology, and particularly relates to a centrifugal production apparatus for LC-grade diethyltoluene diamine. Background Technology

[0002] Ethyltoluene diamine is an important organic intermediate widely used in dyes, pharmaceuticals, and polymer materials. LC-grade diethyltoluene diamine refers to a high-purity product with chromatographic purity and extremely low impurity content. It exhibits excellent chemical stability and reaction selectivity and is widely used in fields with extremely high purity requirements, such as electronic packaging materials, high-end polyurethane elastomers, and liquid crystal monomers. Its preparation requires enhanced purification processes based on conventional methods, such as multi-stage recrystallization, precision distillation, and adsorption purification techniques. Strict control of metal ions and by-product residues is essential. At the same time, precise control of reaction conditions is necessary during production to ensure batch stability and meet the high-purity standards of LC-grade products.

[0003] However, in the synthesis of LC-grade diethyltoluene diamine, existing reactors are prone to generating flocculent byproducts or incompletely reacted intermediates due to factors such as temperature and pressure fluctuations and uneven raw material concentrations. These flocculents easily adhere to the inner wall surface of the reactor and cannot continue to participate in the reaction because they cannot fully contact the reaction medium, resulting in raw material waste and affecting product quality. Currently, scraper structures are commonly used to remove them, but this method has obvious drawbacks: during the scraping process, the scraped flocculents are concentrated and pushed to the front of the scraper, forming an accumulation. This makes it difficult for these substances to dissolve effectively or participate in subsequent reactions. Even worse, when the flocculents are carried into the reaction liquid, they are often thrown back to the reactor wall and re-attached due to the centrifugal force generated by stirring, forming a cycle of "attachment-scraping-re-attachment". This seriously affects the uniformity of the reaction and the purity and preparation accuracy of the final product. Summary of the Invention

[0004] In order to overcome the shortcomings mentioned in the background art, the present invention provides an LC-grade diethyltoluene diamine centrifugal production apparatus.

[0005] The technical solution is as follows: an LC-grade diethyltoluene diamine centrifugal production device, comprising a support frame, a reaction vessel fixedly connected to the support frame, a rotating ring rotatably connected inside the reaction vessel, a plurality of fixed cylinders fixedly connected to the rotating ring, a scraper provided on each fixed cylinder, the scraper being used to scrape off the deposits on the inner wall of the reaction vessel, the side of the scraper away from the inner wall of the reaction vessel being inclined in the opposite direction to its own revolution direction, a guide plate provided on the scraper, a plurality of filter screens provided between the scraper and the guide plate, a feed pipe and a discharge pipe fixedly connected and connected to the top and bottom of the reaction vessel respectively, a centrifugal stirring assembly for stirring the solution provided inside the reaction vessel, and a rotating assembly for driving the rotating ring to move inside the reaction vessel.

[0006] Furthermore, the pore size of several of the filter screens gradually decreases from one near the inner wall of the reactor to the other.

[0007] Furthermore, the centrifugal stirring assembly includes a servo motor, the output shaft of which is fixedly connected to a rotating shaft, the rotating shaft being rotatably and sealed to the reaction vessel, and a plurality of stirring plates being fixedly connected to the rotating shaft.

[0008] Furthermore, the rotating assembly includes a first gear, which is fixedly connected to the rotating shaft. The reactor is rotatably connected to a second gear that meshes with the first gear, and the rotating ring is fixedly connected to a toothed assembly that is driven by the second gear.

[0009] Furthermore, a rotating shaft is rotatably connected inside the fixed cylinder, the rotating shaft is fixedly connected to the adjacent scraper, the scraper is rotatably connected to the adjacent fixed cylinder, and the bracket is provided with a deflection assembly for driving all the scrapers to deflect.

[0010] Furthermore, the deflection assembly includes an electric push rod, which is fixedly connected to the reactor. The reactor is slidably connected to a transmission frame, and the telescopic end of the electric push rod is fixedly connected to the transmission frame. A rotating sleeve is splined to the rotating ring, and the transmission frame and the rotating sleeve are rotatably connected with a limiting position. The rotating shaft is provided with an inclined groove, and the rotating sleeve is fixedly connected with the same number of locking blocks as the rotating shaft. The locking blocks slide within the corresponding inclined grooves, and the fixed cylinder is provided with a drive assembly for moving the guide plate on it.

[0011] Furthermore, the driving component includes a limiting plate, which is fixedly connected to an adjacent fixed cylinder. The limiting plate is provided with a shifting groove. The guide plate is fixedly connected to a retaining shaft, which slides within the shifting groove. The filter screen is slidably connected to the adjacent guide plate, and the scraper is slidably connected to the guide plate.

[0012] Furthermore, the transposition groove is composed of two symmetrically distributed straight grooves and an arc-shaped groove connected alternately, and the arc-shaped groove is located between the two straight grooves.

[0013] Furthermore, several of the filter screens are slidably connected to the adjacent scrapers.

[0014] Furthermore, the limiting plate is fixedly connected to a top block, which is an isosceles triangular block. The bottom of the top block is in contact with the limiting plate, and the top block is used to drive the locking shaft located in the arc groove to achieve up-and-down reciprocating motion.

[0015] The beneficial effects are as follows: 1. The present invention forms a flow channel by means of a scraper and a guide plate, so that the reaction solution carries the flocculent scraped by the scraper into the flow channel. The flocculent is intercepted by the filter screen, and the flocculent gradually dissolves under the continuous impact of the reaction solution, thus ensuring the purity and reaction accuracy of the diethyltoluene diamine preparation process.

[0016] 2. By using multi-stage pore size filters to intercept flocculants, the probability of their accumulation on a single filter screen is reduced, and the dissolution efficiency is accelerated. At the same time, scrapers and guide plates are used to guide the solution on the inner wall of the reactor towards the center, forming an internal and external counterflow, promoting uniform mixing, and effectively improving the preparation accuracy of diethyltoluene diamine.

[0017] 3. By periodically removing the scraper from the inner wall of the reactor and adjusting the flow channel formed by it and the guide plate to the tangential direction of its rotation, the flow rate of the solution flowing through the channel is increased, the flushing effect is enhanced, thereby improving the dissolution efficiency of internal flocculants and ensuring the preparation accuracy of diethyltoluene diamine.

[0018] 4. By bringing the guide plate and the scraper together, the flocculent material between them is flattened and adheres to the extrusion surfaces of the two. Then, by moving the guide plate up and down, it is further flattened, increasing the contact area between the flocculent material and the reaction solution, effectively improving the dissolution rate, and ensuring the high efficiency and stability of the preparation process. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a three-dimensional cross-sectional view of the reaction vessel of the present invention;

[0021] Figure 3 This is a three-dimensional structural diagram of the fixing cylinder and scraper of the present invention;

[0022] Figure 4 This is a three-dimensional structural diagram of the guide plate and filter screen of the present invention;

[0023] Figure 5 This is a three-dimensional structural diagram of the first gear and the second gear of the present invention;

[0024] Figure 6 This is a three-dimensional structural diagram of the rotating shaft of the present invention;

[0025] Figure 7 This is a three-dimensional structural diagram of the electric push rod and transmission frame of the present invention;

[0026] Figure 8 This is a three-dimensional structural diagram of the inclined slide and the locking block of the present invention;

[0027] Figure 9 This is a three-dimensional structural diagram of the top block of the present invention.

[0028] Component names and serial numbers in the diagram: 1-Support, 2-Reaction vessel, 3-Rotating ring, 4-Fixed cylinder, 5-Scraper, 6-Guide plate, 7-Filter screen, 8-Feed pipe, 9-Discharge pipe, 201-Servo motor, 202-Rotating shaft, 203-Agitating plate, 301-First gear, 302-Second gear, 303-Gear assembly, 401-Rotating shaft, 402-Electric push rod, 403-Transmission frame, 404-Rotating sleeve, 405-Inclined chute, 406-Clamping block, 501-Limiting plate, 502-Transfer groove, 503-Clamping shaft, 5021-Straight groove, 5022-Arc groove, 504-Top block. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the invention and are not intended to limit the invention.

[0030] In the synthesis of diethyltoluene diamine, flocculation is easily generated due to temperature and pressure fluctuations and uneven raw material concentrations in the reaction system. These flocculations often adhere to the inner wall of the reactor, making it difficult for them to participate in the reaction and affecting the purity and yield of the product. Currently, scrapers are often used for removal, but when the scraper is running, it pushes the flocculations to the front of the scraper and causes them to accumulate, making it difficult to dissolve them effectively. More seriously, the flocculations carried into the solution are easily subjected to the centrifugal force of stirring and are thrown back to the inner wall of the reactor and re-attached, forming a cycle of "attachment-scraping-re-attachment". This results in poor removal effect and seriously affects the uniformity, continuity of the reaction and the precision of the final product preparation. Example 1

[0031] This embodiment discloses a centrifugal production apparatus for LC-grade diethyltoluenediamine, used to prepare LC-grade diethyltoluenediamine.

[0032] like Figures 1-5As shown, the reactor includes a support 1, a reactor 2 fixedly connected to the support 1, a rotating ring 3 rotatably connected inside the reactor 2, and several fixed cylinders 4 fixedly connected to the rotating ring 3. Each fixed cylinder 4 is equipped with a scraper 5, which is used to scrape off deposits from the inner wall of the reactor 2. The side of the scraper 5 away from the inner wall of the reactor 2 is tilted in the opposite direction to its own revolution direction. The scraper 5 is equipped with a guide plate 6, and several filter screens 7 are arranged between the scraper 5 and the guide plate 6. The top and bottom of the reactor 2 are fixedly connected and connected to an inlet pipe 8 and an outlet pipe 9, respectively. A centrifugal stirring assembly for stirring the solution is installed inside the reactor 2, and a rotating assembly for driving the rotating ring 3 is installed inside the reactor 2. The pore size of the filter screens 7 gradually decreases from one closest to the inner wall of the reactor 2 to the other.

[0033] In the above scheme, there are three fixed cylinders 4. The fixed cylinders 4 are fixedly connected to the scraper 5, the scraper 5 is fixedly connected to the guide plate 6, and the scraper 5, guide plate 6, and filter screen 7 are fixedly connected. The above connection relationships are limited to this embodiment. Figure 2 The direction of rotation is explained as follows: the scrapers 5 revolve clockwise, while the side of the scraper 5 furthest from the inner wall of the reactor 2 deflects counterclockwise. This allows the reaction solution at the inner wall of the reactor 2 to flow along the guide channel formed by the scraper 5 and the guide plate 6, guiding the reaction solution from the outside to the inside, thus achieving the counterflow of the reaction solutions from the inside and outside and increasing the reaction rate of diethyltoluene diamine. There are three filter screens 7 between the scraper 5 and the guide plate 6, and the three filter screens 7 are distributed in a straight line at equal intervals. The pore size of the three filter screens 7 gradually decreases from the one closest to the inner wall of the reactor 2 to the other. Figure 4 The aperture in the diagram is for illustrative purposes. It is used to allow the reaction solution in the reactor 2 to carry the flocculents into the space between the scraper 5 and the guide plate 6, thereby intercepting flocculents of different sizes in sequence. This ensures that the flocculents are evenly dispersed between the scraper 5 and the guide plate 6, increasing the dissolution rate of the flocculents. The feed pipe 8 and the discharge pipe 9 are used to inject the reaction raw materials and discharge the products, respectively. The scraper 5 and the guide plate 6 form a flow channel, allowing the reaction solution to carry the flocculents scraped off by the scraper 5 into the flow channel. The flocculents are intercepted by the filter screen 7, and at the same time, the flocculents gradually dissolve under the continuous impact of the reaction solution, ensuring the purity and reaction accuracy of the diethyltoluene diamine preparation process.

[0034] like Figure 1 , Figure 2 and Figure 5As shown, the centrifugal stirring assembly includes a servo motor 201, the output shaft of the servo motor 201 is fixedly connected to a rotating shaft 202, the rotating shaft 202 is rotatably connected to the reactor 2 in a sealed manner, the rotating shaft 202 is fixedly connected to a plurality of stirring plates 203, the rotating assembly includes a first gear 301, the first gear 301 is fixedly connected to the rotating shaft 202, the reactor 2 is rotatably connected to a second gear 302 that meshes with the first gear 301, and the rotating ring 3 is fixedly connected to a toothed gear set 303 that is pulsatorically connected to the second gear 302.

[0035] In the above scheme, a support frame is fixedly connected to the top of the reactor 2. The support frame is fixedly connected to the servo motor 201. The central axis of the reactor 2, the central axis of the rotating shaft 202, and the central axis of the rotating ring 3 coincide. The number and shape of the stirring plates 203 on the rotating shaft 202 can be freely set. The stirring plates 203 are used to generate centrifugal agitation of the reaction solution to accelerate the preparation rate of diethyltoluene diamine. During the rotation of the first gear 301 driven by the rotating shaft 202, the first gear 301 can realize the synchronous rotation of the rotating ring 3 through the second gear 302 and the tooth group 303.

[0036] Working principle: When preparing LC-grade diethyltoluene diamine, the operator injects a measured amount of reaction solution into the reactor 2 through the feed pipe 8. After the reaction solution injection is completed, the operator turns on the servo motor 201. The output shaft of the servo motor 201 drives several agitator plates 203 to rotate clockwise via the rotating shaft 202. Figure 2 (Explained from a top-down view), causing several stirring plates 203 to move the reaction solution in the reactor 2, causing the reaction solution in the reactor 2 to begin reacting to generate diethyltoluenediamine.

[0037] During the rotation of the rotating shaft 202, the rotating shaft 202 drives the first gear 301 on it to rotate synchronously. The first gear 301 drives the rotating ring 3 to rotate synchronously through the second gear 302 and the tooth assembly 303. The rotating ring 3 drives the scraper 5 to rotate synchronously through several fixed cylinders 4 on it, so that the scraper 5 rotates against the inner wall of the reactor 2, scraping off the flocculent attached to the inner wall of the reactor 2. The flocculent is accumulated on its front side due to the scraping force of the scraper 5. Since the scraper 5 and the guide plate 6 form a flow channel, the reaction solution flows along the reactor 2 to the space between the scraper 5 and the guide plate 6. The reaction solution carries the flocculent accumulated in front of the scraper 5 into the flow channel between the scraper 5 and the guide plate 6. The flocculent is intercepted and collected by the filter screen 7, so that the flocculent dissolves into the reaction solution under the continuous impact of the reaction solution, ensuring the preparation accuracy of diethyltoluene diamine.

[0038] Because the flow apertures of the three filter screens 7 between the scraper 5 and the guide plate 6 gradually decrease, the flocs are evenly distributed between the scraper 5 and the guide plate 6 at different sizes, reducing the probability of the flocs being on the same filter screen 7 and increasing the dissolution rate of the flocs. At the same time, because the scraper 5 is set at an angle, the scraper 5 and the guide plate 6 guide the reaction solution on the inner wall of the reactor 2 to its interior, so that the reaction solution outside the reactor 2 and the reaction solution inside the reactor 2 are flushed out, further improving the preparation accuracy of diethyltoluene diamine.

[0039] After the preparation of diethyltoluenediamine is completed, the operator turns off the servo motor 201 and discharges the product from the reactor 2 through the discharge pipe 9, and cleans the reactor 2. When diethyltoluenediamine needs to be prepared again, the above steps are repeated. Example 2

[0040] This embodiment discloses a centrifugal production apparatus for LC-grade diethyltoluene diamine, which is a further improvement on the apparatus in Embodiment 1.

[0041] During the preparation of diethyltoluenediamine, due to the large amount of flocculent material attached to the inner wall of the reactor 2, the dissolution rate of the flocculent material on the filter screen 7 is less than the rate at which the flocculent material adheres to the filter screen 7. This increases the probability of the flocculent material blocking the filter screen 7, causing the reaction solution to be unable to flow between the scraper 5 and the guide plate 6 and dissolve the flocculent material, thus greatly affecting the preparation accuracy of diethyltoluenediamine.

[0042] like Figures 6-8 As shown, a rotating shaft 401 is rotatably connected inside the fixed cylinder 4. The rotating shaft 401 is fixedly connected to the adjacent scraper 5. The scraper 5 is rotatably connected to the adjacent fixed cylinder 4. The bracket 1 is provided with a deflection assembly for driving all scrapers 5 to deflect. The deflection assembly includes an electric push rod 402, which is fixedly connected to the reactor 2. The reactor 2 is slidably connected to a transmission frame 403. The telescopic end of the electric push rod 402 is fixedly connected to the transmission frame 403. A rotating sleeve 404 is splined connected to the rotating ring 3. The transmission frame 403 and the rotating sleeve 404 are rotatably connected. The rotating shaft 401 is provided with an inclined groove 405. The rotating sleeve 404 is fixedly connected with the same number of locking blocks 406 as the rotating shaft 401. The locking blocks 406 slide in the corresponding inclined groove 405. The fixed cylinder 4 is provided with a drive assembly for driving the guide plate 6 on it to move.

[0043] In the above scheme, the rotating shaft 401 can drive the scraper 5 to rotate around the fixed cylinder 4. The electric push rod 402 is fixedly connected to the support frame at the top of the reactor 2. The transmission frame 403 and the rotating sleeve 404 are limited in the upper and lower positions. The telescopic end of the electric push rod 402 can drive the transmission frame 403 to move up and down along the reactor 2. The transmission frame 403 drives all the locking blocks 406 on it to move up and down synchronously through the rotating sleeve 404. The up and down movement of the locking blocks 406 can realize the rotation of the rotating shaft 401 through the inclined slide 405. Initially, the locking blocks 406 are located at the top of the inclined slide 405. At this time, the rotating shaft 401 drives the scraper 5 to fit against the inner wall of the reactor 2. When the locking blocks 406 slide along the inclined slide 405 to its bottom, the rotating shaft 401 drives the scraper 5 to separate from the inner wall of the reactor 2, so that the scraper 5 and the guide plate 6 form a flow channel in the tangential direction of the scraper 5 rotation direction.

[0044] like Figure 6 and Figure 9 As shown, the drive assembly includes a limiting plate 501, which is fixedly connected to an adjacent fixed cylinder 4. The limiting plate 501 is provided with a shifting groove 502. A guide plate 6 is fixedly connected to a retaining shaft 503, which slides within the shifting groove 502. The filter screen 7 is slidably connected to the adjacent guide plate 6, and the scraper 5 is slidably connected to the guide plate 6. The shifting groove 502 is composed of two symmetrically distributed straight grooves 5021 and an arc-shaped groove 5022, which are alternately connected. The arc-shaped groove 5022 is located between the two straight grooves 5021. Several filter screens 7 are slidably connected to the adjacent scraper 5. A top block 504 is fixedly connected to the limiting plate 501. The top block 504 is an isosceles triangular block, and its lower base is in contact with the limiting plate 501. The top block 504 is used to drive the retaining shaft 503, which is located within the arc-shaped groove 5022, to achieve reciprocating up-and-down movement.

[0045] In the above scheme, the limiting plate 501 is fan-shaped and passes through the rotation axis of the rotating shaft 401. The radius of the circle containing the limiting plate 501 is misaligned with the straight groove 5021, and the radius of the circle containing the arc-shaped groove 5022 passes through the rotation axis of the rotating shaft 401. Figure 9The orientation is described as follows: In the initial state, the retaining shaft 503 is located in front of the right straight groove 5021. At this time, the guide plate 6 and the scraper 5 are separated. When the retaining shaft 503 is located in the arc groove 5022, the guide plate 6 and the scraper 5 are in contact. That is, during the sliding of the retaining shaft 503 from the shift groove 502, the guide plate 6 gradually contacts the scraper 5, and after a certain period of contact, the guide plate 6 and the scraper 5 separate. The top block 504 is an isosceles triangular block. When the retaining shaft 503 slides along the arc groove 5022, the retaining shaft 503 first contacts the right side of the top block 504, so that the retaining shaft 503 moves upward under the squeezing force of the top block 504. When the retaining shaft 503 slides to the middle of the arc groove 5022, the retaining shaft 503 moves downward along the left side of the top block 504. The top block 504 is used to drive the retaining shaft 503 in the arc groove 5022 to achieve up and down reciprocating motion.

[0046] Working principle: When the rotating ring 3 drives the scraper 5 to scrape off the flocculent material adhering to the inner wall of the reactor 2 through the fixed cylinder 4, the electric push rod 402 is periodically activated. The telescopic end of the electric push rod 402 drives the transmission frame 403 to move downward. The transmission frame 403 drives the rotating sleeve 404 to slide downward along the rotating ring 3. The rotating sleeve 404 drives several locking blocks 406 to move downward synchronously. The locking blocks 406 drive the rotating shaft 401 to rotate through the adjacent inclined sliding groove 405. The rotating shaft 401 drives the scraper 5 on it to rotate synchronously, so that the scraper 5 separates from the inner wall of the reactor 2 and no longer scrapes off the flocculent material on the inner wall, so as to stop the flocculent material from continuing to enter between the scraper 5 and the guide plate 6. When the flow channel formed by the scraper 5 and the guide plate 6 is tangential to the rotation direction of the scraper 5, the electric push rod 402 is turned off to increase the amount of reaction solution flowing through the flow channel formed by the scraper 5 and the guide plate 6, thereby increasing the dissolution rate of the flocculent material between the internal scraper 5 and the guide plate 6.

[0047] During the rotation of scraper 5, Figure 9The direction is explained as follows: the scraper 5 drives the guide plate 6 on it to rotate clockwise. The guide plate 6 drives the locking shaft 503 on it to slide along the corresponding shifting groove 502. When the locking shaft 503 slides from front to back along the first straight groove 5021, the locking shaft 503 drives the guide plate 6 to slide along the filter screen 7, and pushes the flocculent on the filter screen 7 to move synchronously. Finally, the guide plate 6 and the scraper 5 are in contact, flattening the flocculent between the guide plate 6 and the scraper 5, and adhering it to the pressing surface of the guide plate 6 and the scraper 5. At this moment, the locking shaft 503 slides from the first straight groove 5021 into the arc groove 5022, and then the locking shaft 503 slides clockwise along the arc groove 5022. During this process, the guide plate 503... The guide plate 6 and scraper 5 are always in contact, and the clamping shaft 503 is subjected to the squeezing force of the top block 504 to achieve up-and-down reciprocating motion. At the same time, the clamping shaft 503 drives the guide plate 6 and several filter screens 7 to move up and down in sync, further flattening the compacted flocculent and increasing the contact area between the flocculent and the reaction solution. At this moment, the clamping shaft 503 enters the second straight groove 5021 from the arc groove 5022 and slides from back to front along the second straight groove 5021. At this moment, the guide plate 6 and scraper 5 separate again to form a flow channel, so that the reaction solution gradually dissolves the flocculent attached to the guide plate 6 and scraper 5 as it passes through the flow channel, thus accelerating the dissolution rate of the flocculent.

[0048] In the above state, after the rotating ring 3 rotates five to ten times, the electric push rod 402 is activated, causing the telescopic end of the electric push rod 402 to drive the transmission frame 403 to reset upward. The transmission frame 403 drives several locking blocks 406 to move upward through the rotating sleeve 404, causing the locking blocks 406 to drive the rotating shaft 401 to reset and rotate through the inclined slide groove 405. The rotating shaft 401 drives the scraper 5 to reset, so that the scraper 5 is in contact with the inner wall of the reactor 2, and the flocculent material attached to the inner wall of the reactor 2 is scraped off again. This process is repeated until the preparation of diethyltoluene diamine is completed.

[0049] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An LC-grade diethyltoluene diamine centrifugal production apparatus, comprising a support (1), wherein a reaction vessel (2) is fixedly connected to the support (1), a rotating ring (3) is rotatably connected inside the reaction vessel (2), and a plurality of fixed cylinders (4) are fixedly connected to the rotating ring (3), wherein each fixed cylinder (4) is provided with a scraper (5), the scraper (5) being used to scrape off the deposits on the inner wall of the reaction vessel (2), wherein the side of the scraper (5) away from the inner wall of the reaction vessel (2) is obliquely oriented in the opposite direction to its own revolution direction, characterized in that, The scraper (5) is provided with a guide plate (6), and the scraper (5) and the guide plate (6) form a flow channel, so that the reaction solution carries the attachment scraped by the scraper (5) into the flow channel. Several filter screens (7) are provided between the scraper (5) and the guide plate (6). The top and bottom of the reaction vessel (2) are fixedly connected and connected to the feed pipe (8) and the discharge pipe (9). The reaction vessel (2) is provided with a centrifugal stirring assembly for stirring the solution. The reaction vessel (2) is provided with a rotating assembly for driving the rotating ring (3) to move. The fixed cylinder (4) is rotatably connected to a rotating shaft (401), the rotating shaft (401) is fixedly connected to the adjacent scraper (5), the scraper (5) is rotatably connected to the adjacent fixed cylinder (4), and the bracket (1) is provided with a deflection assembly for driving all the scrapers (5) to deflect. The deflection assembly includes an electric push rod (402), which is fixedly connected to the reactor (2). The reactor (2) is slidably connected to a transmission frame (403). The telescopic end of the electric push rod (402) is fixedly connected to the transmission frame (403). The rotating ring (3) is splinedly connected to a rotating sleeve (404). The transmission frame (403) and the rotating sleeve (404) are rotatably connected in a limited position. The rotating shaft (401) is provided with an inclined slide groove (405). The rotating sleeve (404) is fixedly connected with a number of locking blocks (406) equal to the number of the rotating shaft (401). The locking blocks (406) slide in the corresponding inclined slide groove (405). The fixed cylinder (4) is provided with a drive assembly for driving the guide plate (6) on it to move. The drive assembly includes a limiting plate (501), which is fixedly connected to the adjacent fixed cylinder (4). The limiting plate (501) is provided with a shifting groove (502). The guide plate (6) is fixedly connected with a retaining shaft (503), which slides in the shifting groove (502). The filter screen (7) is slidably connected to the adjacent guide plate (6), and the scraper (5) is slidably connected to the guide plate (6). The transposition groove (502) is composed of two symmetrically distributed straight grooves (5021) and an arc-shaped groove (5022) connected alternately, and the arc-shaped groove (5022) is located between the two straight grooves (5021); Several of the filter screens (7) are slidably connected to the adjacent scraper (5); The limiting plate (501) is fixedly connected to a top block (504). The top block (504) is an isosceles triangular block. The bottom of the top block (504) is in contact with the limiting plate (501). The top block (504) is used to drive the locking shaft (503) located in the arc groove (5022) to achieve up-and-down reciprocating motion.

2. The centrifugal production apparatus for LC-grade diethyltoluene diamine according to claim 1, characterized in that, The pore size of several of the filter screens (7) gradually decreases from one to the other near the inner wall of the reactor (2).

3. The centrifugal production apparatus for LC-grade diethyltoluene diamine according to claim 1, characterized in that, The centrifugal stirring assembly includes a servo motor (201), the output shaft of which is fixedly connected to a rotating shaft (202), the rotating shaft (202) is sealed and rotatably connected to the reactor (2), and the rotating shaft (202) is fixedly connected to several stirring plates (203).

4. The centrifugal production apparatus for LC-grade diethyltoluene diamine according to claim 3, characterized in that, The rotating assembly includes a first gear (301), which is fixedly connected to the rotating shaft (202). The reactor (2) is rotatably connected to a second gear (302) that meshes with the first gear (301). The rotating ring (3) is fixedly connected to a toothed assembly (303) that is driven by the second gear (302).

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