LC-grade diethyl toluenediamine centrifugal production device

Abstract

The invention belongs to the technical field of production of diethyltoluenediamine, and particularly relates to an LC-grade centrifugal production device for diethyltoluenediamine. Comprising a support, the support is fixedly connected with a reaction kettle, a rotating ring is rotatably connected in the reaction kettle, the rotating ring is fixedly connected with a plurality of fixing cylinders, the fixing cylinders are provided with scraping plates, the scraping plates are used for scraping attachments on the inner wall of the reaction kettle, and the scraping plates are provided with guide plates. A plurality of filter screens are arranged between the scraping plate and the guide plate, and the top and the bottom of the reaction kettle are fixedly connected and communicated with a feeding pipe and a discharging pipe respectively. The guide channel is formed by the scraping plate and the guide plate, so that the reaction solution drives flocculate scraped by the scraping plate to enter the guide channel, and the flocculate is intercepted by the filter screen, so that the flocculate is gradually dissolved under the continuous impact of the reaction solution, and the purity and the reaction precision in the preparation process of diethyltoluenediamine are guaranteed.

Description

Technical Field

[0001] The invention complies with the technical field of diethyltoluenediamine production, and in particular relates to a centrifugal production device for LC-grade diethyltoluenediamine. Background Art

[0002] Ethyltoluenediamine is an important organic intermediate, widely used in dyes, pharmaceuticals, polymer materials and other fields. Among them, LC-grade diethyltoluenediamine refers to a high-purity product with chromatographic purity and extremely low impurity content. It has excellent chemical stability and reaction selectivity and is widely used in electronic packaging materials, high-end polyurethane elastomers, liquid crystal monomers and other fields with extremely high purity requirements. Its preparation requires strengthening the refining process on the basis of conventional processes, such as the use of multi-stage recrystallization, precision distillation and adsorption purification technologies to strictly control metal ions and by-product residues. At the same time, the reaction conditions must be precisely controlled during production to ensure batch stability and meet the high purity standards of LC-grade products.

[0003] However, when synthesizing LC-grade diethyltoluenediamine in existing reactors, flocculent byproducts or incompletely reacted intermediates are easily generated due to factors such as temperature and pressure fluctuations in the reaction system and uneven raw material concentrations, forming floccules. These floccules easily adhere to the inner surface of the reactor and, unable to fully contact the reaction medium, are unable to continue to participate in the reaction, resulting in raw material waste and affecting product quality. Currently, a scraper structure is commonly used to remove these floccules, but this method has obvious drawbacks: during the pushing process, the scraper will push the scraped floccules to the front side of the scraper, forming an accumulation, making it difficult for these substances to effectively dissolve or participate in subsequent reactions. Moreover, after the floccules are carried into the reaction liquid, they are often thrown back to the reactor wall due to the centrifugal force generated by stirring and reattach, forming a "attachment-scraping-reattachment" cycle, which 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 above background technology, the present invention provides a centrifugal production device for LC-grade diethyltoluenediamine.

[0005] The technical solution is: an LC-grade diethyltoluenediamine centrifugal production device, comprising a bracket, the bracket is fixedly connected to a reactor, a rotating ring is rotatably connected in the reactor, the rotating ring is fixedly connected to a plurality of fixed cylinders, the fixed cylinders are provided with a scraper, the scraper is used to scrape off attachments on the inner wall of the reactor, the scraper is tilted in the opposite direction of its own revolution direction away from the side of the inner wall of the reactor, the scraper is provided with a guide plate, a plurality of filters are provided between the scraper and the guide plate, the top and bottom of the reactor are respectively fixedly connected and connected to a feed pipe and a discharge pipe, a centrifugal stirring component for stirring the solution is provided in the reactor, and a rotating component for driving the rotating ring to move is provided in the reactor.

[0006] Furthermore, the filtration apertures of the plurality of filter screens gradually decrease from one close to the inner wall of the reactor to another.

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

[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 meshing with the first gear. The rotating ring is fixedly connected to a tooth group transmission-connected to the second gear.

[0009] Furthermore, a rotating shaft is rotatably connected in 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 component for driving all the scrapers to deflect.

[0010] Furthermore, the deflection assembly includes an electric push rod, which is fixedly connected to the reactor, and the reactor is sealed and slidably connected to a transmission frame. The telescopic end of the electric push rod is fixedly connected to the transmission frame, the rotating ring is splined with a rotating sleeve, and the transmission frame and the rotating sleeve are limitedly rotatably connected, the rotating shaft is provided with an inclined slide groove, and the rotating sleeve is fixedly connected with the same number of blocks as the rotating shaft, and the blocks slide in the corresponding inclined slide grooves, and the fixed cylinder is provided with a driving assembly for driving the guide plate thereon to move.

[0011] Furthermore, the driving assembly includes a limiting plate, which is fixedly connected to the adjacent fixed cylinder, and the limiting plate is provided with a transposition groove. The guide plate is fixedly connected with a clamping shaft, and the clamping shaft slides in the transposition groove. The filter 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 alternately connected, and the arc-shaped groove is located between the two straight grooves.

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

[0014] Furthermore, the limit plate is fixedly connected to a top block, which is an isosceles triangle block. The lower bottom of the top block is in contact with the limit plate, and the top block is used to drive the clamping shaft in the arc groove to achieve up and down reciprocating motion.

[0015] The beneficial effects are as follows: 1. The present invention forms a diversion channel through the scraper and the guide plate, so that the reaction solution drives the flocculants scraped by the scraper into the diversion channel, and the flocculants are intercepted by the filter screen, so that the flocculants are gradually dissolved under the continuous impact of the reaction solution, thereby ensuring the purity and reaction accuracy of the diethyltoluenediamine preparation process.

[0016] 2. The multi-stage aperture filter is used to intercept flocculants in a graded manner, reducing the probability of their accumulation on a single filter and accelerating the dissolution efficiency. At the same time, scrapers and guide plates are used to guide the solution on the inner wall of the reactor to the center, forming internal and external hedging, promoting uniform mixing, and effectively improving the preparation accuracy of diethyltoluenediamine.

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

[0018] 4. By fitting the guide plate and the scraper, the flocs between them are flattened and attached to the extrusion surfaces of the two. The guide plate is then moved up and down to further flatten the flocs, thereby increasing the contact area between the flocs and the reaction solution, effectively improving the dissolution rate and ensuring the efficiency and stability of the preparation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 Schematic diagram of the three-dimensional structure of the reactor of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the fixed cylinder and the scraper of the present invention; Figure 4 Schematic diagram of the three-dimensional structure of the guide plate and filter screen of the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the first gear and the second gear of the present invention; Figure 6 Schematic diagram of the three-dimensional structure of the rotating shaft of the present invention; Figure 7Schematic diagram of the three-dimensional structure of the electric push rod and the transmission frame of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the inclined chute and the clamping block of the present invention; Figure 9 It is a schematic diagram of the three-dimensional structure of the top block of the present invention.

[0020] The names and serial numbers of the parts in the figure are: 1- bracket, 2- reactor, 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- stirring plate, 301- first gear, 302- second gear, 303- tooth group, 401- rotating shaft, 402- electric push rod, 403- transmission frame, 404- rotating sleeve, 405- inclined slide, 406- clamping block, 501- limiting plate, 502- displacement groove, 503- clamping shaft, 5021- straight groove, 5022- arc groove, 504- top block. DETAILED DESCRIPTION

[0021] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] During the synthesis of diethyltoluenediamine, floccules are easily generated due to temperature and pressure fluctuations in the reaction system and uneven raw material concentrations. These floccules often adhere to the inner wall of the reactor, making it difficult for them to participate in the reaction, affecting the purity and yield of the product. Currently, scrapers are mostly used for removal, but the scrapers will push the floccules to the front side of the scrapers during operation, causing accumulation, which is still difficult to effectively dissolve. What is more serious is that the floccules brought into the solution are easily affected by the centrifugal force of stirring, and are thrown to the inner wall of the reactor again and reattach, forming a "attachment-scraping-reattachment" cycle, resulting in poor removal effect, seriously affecting the uniformity and continuity of the reaction and the preparation accuracy of the final product. Example 1

[0023] This embodiment discloses a centrifugal production device for LC-grade diethyltoluenediamine, which is used to prepare LC-grade diethyltoluenediamine.

[0024] like Figure 1-Figure 5As shown, it includes a bracket 1, the bracket 1 is fixedly connected to a reactor 2, a rotating ring 3 is rotatably connected inside the reactor 2, the rotating ring 3 is fixedly connected to a number of fixed cylinders 4, the fixed cylinder 4 is provided with a scraper 5, the scraper 5 is used to scrape off attachments on 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 of its own revolution direction, the scraper 5 is provided with a guide plate 6, and a number of filter screens 7 are provided between the scraper 5 and the guide plate 6, the top and bottom of the reactor 2 are respectively fixedly connected and connected with a feed pipe 8 and a discharge pipe 9, a centrifugal stirring assembly for stirring the solution is provided in the reactor 2, and a rotating assembly for driving the rotating ring 3 to move is provided in the reactor 2; the filtration aperture of the several filter screens 7 gradually decreases from one close to the inner wall of the reactor 2 to another.

[0025] In the above scheme, the number of fixed cylinders 4 is three, the connection relationship between the fixed cylinder 4 and the scraper 5 is a fixed connection, the connection relationship between the scraper 5 and the guide plate 6 is a fixed connection, and the connection relationship between the scraper 5 and the guide plate 6 and the filter 7 is a fixed connection. The above connection relationship is limited to this embodiment. Figure 2 The direction is explained, the revolution direction of the scrapers 5 is clockwise, and the side of the scraper 5 away from the inner wall of the reactor 2 is deflected in the counterclockwise direction, so that the reaction solution at the inner wall of the reactor 2 can flow along the guide channel formed by the scraper 5 and the guide plate 6, and the reaction solution on the outside is guided inward to achieve the hedging of the inner and outer reaction solutions, thereby improving the reaction rate of diethyltoluenediamine. There are three filters 7 between the scraper 5 and the guide plate 6, and the three filters 7 are distributed in a straight line with equal spacing. The filtration apertures of the three filters 7 gradually decrease from one close to the inner wall of the reactor 2 to another. Figure 4 The aperture in is for reference only and is used to allow the reaction solution in the reactor 2 to carry flocs into the space between the scraper 5 and the guide plate 6 to intercept flocs of different sizes in turn, so that the flocs are evenly dispersed between the scraper 5 and the guide plate 6, thereby increasing the dissolution rate of the flocs. 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 diversion channel, so that the reaction solution drives the flocs scraped off by the scraper 5 into the diversion channel, and the flocs are intercepted by the filter screen 7. At the same time, the flocs are gradually dissolved under the continuous impact of the reaction solution, thereby ensuring the purity and reaction accuracy of the diethyltoluenediamine preparation process.

[0026] 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 the rotating shaft 202, the rotating shaft 202 is sealed and rotatably connected to the reactor 2, 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 the second gear 302 meshing with the first gear 301, and the rotating ring 3 is fixedly connected to the tooth group 303 that is transmission-connected to the second gear 302.

[0027] In the above scheme, a support frame is fixedly connected to the top of the reactor 2, and 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 with each other. 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 for the reaction solution to accelerate the preparation rate of diethyltoluenediamine. When the rotating shaft 202 drives the first gear 301 to rotate, the first gear 301 can realize synchronous rotation of the rotating ring 3 through the second gear 302 and the tooth group 303.

[0028] Working principle: When it is necessary to prepare LC-grade diethyltoluenediamine, the staff injects a certain amount of reaction solution into the reactor 2 through the feed pipe 8. After the reaction solution is injected, the staff turns on the servo motor 201. The output shaft of the servo motor 201 drives the stirring plates 203 to rotate clockwise (in degrees) through the rotating shaft 202. Figure 2 The stirring plates 203 are used to drive the reaction solution in the reactor 2, so that the reaction solution in the reactor 2 starts to react to generate diethyltoluenediamine.

[0029] During the rotation of the rotating shaft 202, the rotating shaft 202 drives the first gear 301 thereon to rotate synchronously. The first gear 301 drives the rotating ring 3 to rotate synchronously through the second gear 302 and the tooth group 303. The rotating ring 3 drives the scraper 5 to rotate synchronously through the plurality of fixed cylinders 4 thereon, so that the scraper 5 rotates in contact with the inner wall of the reactor 2 to scrape off the flocs attached to the inner wall of the reactor 2. The flocs are accumulated on the front side by the scraping force of the scraper 5. Since the scraper 5 and the guide plate 6 form a guide channel, the reaction solution flows along the reactor 2 between the scraper 5 and the guide plate 6. The reaction solution drives the flocs accumulated in front of the scraper 5 to enter the guide channel between the scraper 5 and the guide plate 6 synchronously. The flocs are intercepted and collected by the filter screen 7. Under the continuous impact of the reaction solution, the flocs are dissolved into the reaction solution, thereby ensuring the preparation accuracy of diethyltoluenediamine.

[0030] Since the flow apertures of the three filter screens 7 between the scraper 5 and the guide plate 6 gradually decrease, the floccules of different sizes are evenly distributed between the scraper 5 and the guide plate 6, reducing the probability of floccules being on the same filter screen 7 and increasing the dissolution rate of the floccules. At the same time, since the scraper 5 is arranged at an angle, the scraper 5 and the guide plate 6 guide the reaction solution on the inner wall of the reactor 2 to the interior thereof, so that the reaction solution outside the reactor 2 and the reaction solution inside the reactor 2 are offset, further improving the preparation accuracy of diethyltoluenediamine.

[0031] After the preparation of diethyltoluenediamine is completed, the staff turns off the servo motor 201, discharges the product in 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

[0032] This embodiment discloses a centrifugal production device for LC-grade diethyltoluenediamine, which is further improved on the basis of Example 1.

[0033] During the preparation of diethyltoluenediamine, due to the large amount of flocs attached to the inner wall of the reactor 2, the dissolution rate of the flocs on the filter screen 7 is slower than the rate at which the flocs adhere to the filter screen 7, which increases the probability of the flocs blocking the filter screen 7. As a result, the reaction solution cannot flow between the scraper 5 and the guide plate 6 and dissolve the flocs, which greatly affects the preparation accuracy of diethyltoluenediamine.

[0034] like Figure 6-Figure 8 As shown, a rotating shaft 401 is rotatably connected in the fixed cylinder 4, and the rotating shaft 401 is fixedly connected to the adjacent scraper 5, and the scraper 5 is rotatably connected to the adjacent fixed cylinder 4. The bracket 1 is provided with a deflection component for driving all scrapers 5 to deflect; the deflection component includes an electric push rod 402, the electric push rod 402 is fixedly connected to the reactor 2, and the reactor 2 is sealed and slidably connected to the 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 splined with a rotating sleeve 404, the transmission frame 403 and the rotating sleeve 404 are limitedly rotatably connected, the rotating shaft 401 is provided with an inclined slide groove 405, and the rotating sleeve 404 is fixedly connected with the same number of blocks 406 as the rotating shaft 401, and the blocks 406 slide in the corresponding inclined slide grooves 405, and the fixed cylinder 4 is provided with a driving component for driving the guide plate 6 thereon to move.

[0035] 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 up and down, and 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 blocks 406 thereon to move up and down synchronously through the rotating sleeve 404. The up and down movement of the blocks 406 can realize the rotation of the rotating shaft 401 through the inclined slide 405. The initial block 406 is located at the top of the inclined slide 405. At this moment, the rotating shaft 401 drives the scraper 5 to fit the inner wall of the reactor 2. When the block 406 slides to its bottom along the inclined slide 405, 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 guide channel in a direction tangential to the rotation direction of the scraper 5.

[0036] like Figure 6 and Figure 9 As shown, the driving assembly includes a limit plate 501, which is fixedly connected to the adjacent fixed cylinder 4, and the limit plate 501 is provided with a transposition groove 502. The guide plate 6 is fixedly connected with a card shaft 503, and the card shaft 503 slides in the transposition 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 arc grooves 5022 alternately connected, and the arc groove 5022 is located between the two straight grooves 5021. Several filter screens 7 are slidably connected to the adjacent scraper 5, and the limit plate 501 is fixedly connected with a top block 504. The top block 504 is an isosceles triangle block. The lower bottom of the top block 504 is in contact with the limit plate 501, and the top block 504 is used to drive the card shaft 503 in the arc groove 5022 to realize up and down reciprocating motion.

[0037] In the above scheme, the limiting plate 501 is fan-shaped, and the limiting plate 501 passes through the rotation axis of the rotating shaft 401. The radius of the circle where the limiting plate 501 is located is in a misaligned state with the straight groove 5021, and the radius of the circle where the arc groove 5022 is located passes through the rotation axis of the rotating shaft 401. Figure 9The orientation is explained. In the initial state, the card shaft 503 is located at the front side of the right straight groove 5021. At this moment, the guide plate 6 and the scraper 5 are in a separated state. When the card shaft 503 is located in the arc groove 5022, the guide plate 6 and the scraper 5 are in a fitted state, that is, during the period when the card shaft 503 slides from the transposition groove 502, the guide plate 6 gradually fits with the scraper 5, and after a specific period of fitting, the guide plate 6 and the scraper 5 are separated. The top block 504 is an isosceles triangle block. When the card shaft 503 slides along the arc groove 5022, the card shaft 503 first contacts the waist on the right side of the top block 504, so that the card shaft 503 moves upward under the extrusion force of the top block 504. When the card shaft 503 slides to the middle of the arc groove 5022, the card shaft 503 moves downward along the waist on the left side of the top block 504. The top block 504 is used to drive the card shaft 503 in the arc groove 5022 to realize up and down reciprocating motion.

[0038] Working principle: When the rotating ring 3 drives the scraper 5 to scrape the flocs attached to the inner wall of the reactor 2 through the fixed cylinder 4, the electric push rod 402 is periodically turned on, so that the telescopic end of the electric push rod 402 drives the transmission frame 403 to move downward, and the transmission frame 403 drives the rotating sleeve 404 to slide downward along the rotating ring 3. The rotating sleeve 404 drives several clamping blocks 406 to move downward synchronously, so that the clamping blocks 406 drive the rotating shaft 401 to rotate through the adjacent inclined chute 405. The rotating shaft 401 drives the scraper 5 thereon to rotate synchronously, so that the scraper 5 is separated from the inner wall of the reactor 2 and no longer scrapes the flocs on the inner wall, so as to prevent the flocs from continuing to enter between the scraper 5 and the guide plate 6. When the guide 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 closed to increase the amount of reaction solution flowing through the guide channel formed by the scraper 5 and the guide plate 6, thereby improving the dissolution rate of the flocs between the internal scraper 5 and the guide plate 6.

[0039] During the rotation of the scraper 5, Figure 9The scraper 5 drives the guide plate 6 thereon to rotate clockwise, and the guide plate 6 drives the card shaft 503 thereon to slide along the corresponding transposition groove 502. When the card shaft 503 slides from front to back along the first straight groove 5021, the card shaft 503 drives the guide plate 6 to slide along the filter screen 7 and pushes the flocculants on the filter screen 7 to move synchronously. Finally, the guide plate 6 and the scraper 5 fit together, flattening the flocculants between the guide plate 6 and the scraper 5, and attaching them to the extrusion surface of the guide plate 6 and the scraper 5. At this moment, the card shaft 503 slides from the first straight groove 5021 to the arc groove 5022, and then the card shaft 503 slides clockwise along the arc groove 5022, during which the card shaft 503 is driven. The guide plate 6 and the scraper 5 are always in contact with each other, and the clamping shaft 503 is squeezed by the top block 504 to achieve reciprocating motion up and down. At the same time, the clamping shaft 503 drives the guide plate 6 and the plurality of filter screens 7 to synchronously reciprocate up and down, further flattening the compacted flocs and increasing the contact area between the flocs 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 the scraper 5 are separated to form a flow channel again, so that the reaction solution gradually dissolves the flocs attached to the guide plate 6 and the scraper 5 when passing through the flow channel, thereby accelerating the dissolution rate of the flocs.

[0040] In the above state, after the rotating ring 3 rotates five to ten times, the electric push rod 402 is turned on, so that the telescopic end of the electric push rod 402 drives the transmission frame 403 to reset upward, and the transmission frame 403 drives the plurality of clamping blocks 406 to move upward through the rotating sleeve 404, so that the clamping blocks 406 drive the rotating shaft 401 to reset and rotate through the inclined slide 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 flocculants attached to the inner wall of the reactor 2 are scraped off again. This process is repeated until the preparation of diethyltoluenediamine is completed.

[0041] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A centrifugal production device for LC-grade diethyltoluenediamine, comprising a bracket (1), wherein the bracket (1) is fixedly connected to a reactor (2), wherein a rotating ring (3) is rotatably connected inside the reactor (2), wherein the rotating ring (3) is fixedly connected to a plurality of fixed cylinders (4), wherein the fixed cylinders (4) are provided with scrapers (5), wherein the scrapers (5) are used to scrape off attachments on the inner wall of the reactor (2), wherein the side of the scrapers (5) away from the inner wall of the reactor (2) is inclined in the opposite direction to its own revolution direction, and wherein: The scraper (5) is provided with a guide plate (6), and a plurality of filter screens (7) are provided between the scraper (5) and the guide plate (6). The top and bottom of the reactor (2) are respectively fixedly connected and communicated with a feed pipe (8) and a discharge pipe (9). A centrifugal stirring assembly for stirring the solution is provided in the reactor (2), and a rotating assembly for driving the rotating ring (3) to move is provided in the reactor (2).

2. The centrifugal production device for LC-grade diethyltoluenediamine according to claim 1, characterized in that: The filtration apertures of the plurality of filter screens (7) gradually decrease from one close to the inner wall of the reactor (2) to another.

3. The centrifugal production device for LC-grade diethyltoluenediamine according to claim 1, characterized in that: The centrifugal stirring assembly comprises 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 sealed and rotatably connected to the reactor (2), and the rotating shaft (202) is fixedly connected to a plurality of stirring plates (203).

4. The centrifugal production device for LC-grade diethyltoluenediamine according to claim 3, characterized in that: The rotating assembly comprises a first gear (301), the first gear (301) being fixedly connected to the rotating shaft (202), the reactor (2) being rotationally connected to a second gear (302) meshing with the first gear (301), and the rotating ring (3) being fixedly connected to a tooth set (303) in transmission connection with the second gear (302).

5. The centrifugal production device for LC-grade diethyltoluenediamine according to claim 1, characterized in that: A rotating shaft (401) is rotatably connected in 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), and the bracket (1) is provided with a deflection assembly for driving all the scrapers (5) to deflect.

6. The centrifugal production device for LC-grade diethyltoluenediamine according to claim 5, characterized in that: The deflection assembly includes an electric push rod (402), the electric push rod (402) is fixedly connected to the reactor (2), the reactor (2) is sealingly and slidingly 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 spline-connected to a rotating sleeve (404), the transmission frame (403) and the rotating sleeve (404) are connected in a limited rotation manner, the rotating shaft (401) is provided with an inclined slide groove (405), the rotating sleeve (404) is fixedly connected with a number of blocks (406) equal to the number of the rotating shaft (401), the blocks (406) slide in the corresponding inclined slide grooves (405), and the fixed cylinder (4) is provided with a driving assembly for driving the guide plate (6) thereon to move.

7. The centrifugal production device for LC-grade diethyltoluenediamine according to claim 6, characterized in that: The driving assembly includes a limit plate (501), the limit plate (501) is fixedly connected to the adjacent fixed cylinder (4), the limit plate (501) is provided with a transposition groove (502), the guide plate (6) is fixedly connected to a clamping shaft (503), the clamping shaft (503) slides in the transposition 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).

8. The centrifugal production device for LC-grade diethyltoluenediamine according to claim 7, characterized in that: 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).

9. The centrifugal production device for LC-grade diethyltoluenediamine according to claim 8, characterized in that: Several of the filter screens (7) are slidably connected to adjacent scrapers (5).

10. The centrifugal production device for LC-grade diethyltoluenediamine according to claim 9, characterized in that: The limiting plate (501) is fixedly connected to a top block (504), which is an isosceles triangle block. The bottom of the top block (504) is in contact with the limiting plate (501), and the top block (504) is used to drive the clamping shaft (503) in the arc groove (5022) to achieve up and down reciprocating motion.

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