A separation and purification device and process for isomerization of tetramethylbenzene to produce durene

Abstract

The present application provides a separation and purification device and process for isomerizing tetramethylbenzene to produce tetramethylbenzene, which belongs to the technical field of separation and purification of tetramethylbenzene, and includes a base, a first bracket is fixedly connected to the base, a second bracket is arranged on the rear side of the base, a conveyor belt is installed between the second bracket and the base, a first fixed ring is installed above the first bracket, a second fixed ring is installed above the second bracket, an outer cylinder is rotatably installed between the first fixed ring and the second fixed ring, first side plates and connecting components are respectively arranged on both sides of the outer cylinder, and an inner cylinder is rotatably arranged inside the outer cylinder. The present application solves the problem that the existing separation and purification device cannot use the steam generated during the purification process to preheat the raw materials, cannot use the pushing structure to scrape off the crystals on the inner wall of the cylinder, and can automatically switch to a discharge mode under a specific size during the process of changing the discharge position.

Description

Technical Field

[0001] The invention relates to the technical field of durenyl separation and purification, and in particular to a separation and purification device and process for preparing durenyl by isomerizing tetramethylbenzene. Background Art

[0002] The isomerization of tetramethylbenzene to produce durene is a chemical industrial process, the purpose of which is to separate and purify durene from a mixture of tetramethylbenzene isomers. Therefore, a separation and purification device is required. The existing separation and purification device still has some shortcomings when used.

[0003] For example, the publication number CN103083935B discloses a device and method for continuous separation and purification of durenyl, comprising a vertical tower body and a horizontal tower body, wherein the vertical tower body and the horizontal tower body are both provided with a rotating scraper; a constant temperature feed port is provided on the outside of the vertical tower body, and the vertical tower body comprises, from top to bottom, a residual liquid recovery section and a crystal purification section; the horizontal tower body comprises a crystal collection section and a molten crystal reflux section; the molten crystal reflux section comprises: a constant temperature molten crystal collection tank, a reflux pump and a heater; the molten crystal reflux section is connected to the crystal purification section through a reflux port. The device comprises: the durenyl raw material continuously enters the device, and after countercurrent washing and recrystallization, pure durenyl is purified and separated to obtain pure durenyl, which can realize continuous feeding, continuous extraction of high-purity durenyl crystals and continuous recovery of residual liquid. Although the above-mentioned device can recover residual liquid, it cannot use the generated steam to preheat the raw materials during the purification process, cannot use the pushing structure to scrape off the crystals on the inner wall of the cylinder, cannot limit the range of material falling, and cannot automatically switch to a discharge mode of a specific size when changing the discharge position. Summary of the invention

[0004] In view of the problems existing in the existing durene separation and purification device, the present invention is proposed.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A separation and purification device for isomerizing tetramethylbenzene to prepare durene, comprising a base, a first bracket fixedly connected to the base, a second bracket arranged at the rear side of the base, a conveyor belt installed between the second bracket and the base, a first fixing ring installed above the first bracket, a second fixing ring installed above the second bracket, an outer cylinder rotatably installed between the first fixing ring and the second fixing ring, first side plates and a connection assembly are respectively arranged on both sides of the outer cylinder, an inner cylinder is rotatably arranged in the outer cylinder, through holes are opened on the outer cylinder and the inner cylinder, and the outer cylinder and the inner cylinder are connected to each other. A switching assembly is arranged on the outer cylinder, an electric heating plate is installed on the outer cylinder, a first connecting shell is installed on the front side of the outer cylinder, a first connecting cylinder is rotatably arranged in the first connecting shell, an exhaust pipe and a first bent pipe are installed on the first connecting cylinder, a pushing assembly is installed in the inner cylinder, a first driving assembly is arranged on the rear side of the inner cylinder, a second driving assembly is installed on the outer cylinder, a supporting plate is installed on the base, the supporting plate and the first connecting cylinder are fixedly connected, a second bent pipe is arranged on the outer side of the first bent pipe, a connecting pipe is installed on the exhaust pipe, the connecting pipe is communicated with the interior of the second bent pipe, and an exhaust hole is arranged at the bottom of the second bent pipe.

[0006] As a preferred solution of the present invention, a second connecting shell is fixedly connected to the inner cylinder, the central axes of the outer cylinder and the inner cylinder are collinear, the outer wall of the second connecting shell fits with the inner wall of the first connecting shell, and a convex ring is fixedly connected to the outer cylinder, and the convex ring is rotatably connected to the first fixed ring and the second fixed ring.

[0007] As a preferred solution of the present invention, the electric heating plates are evenly spaced on the outer cylinder, a conductive ring is provided in the middle of the electric heating plates, a second conductive block is provided above the conductive ring, the second conductive block is a spherical structure, the second conductive block is rotatably installed inside the first conductive block, and the first conductive block and the first side plate are fixedly connected.

[0008] As a preferred solution of the present invention, the pusher assembly includes a first motor fixedly connected below the fixed plate, a rotating rod is connected to the output shaft of the first motor, and a pusher plate is connected to the rotating rod.

[0009] As a preferred solution of the present invention, a folding rod is fixedly connected to the front side of the rotating rod, a scraper is fixedly connected to the folding rod, and the scraper is in contact with the second connecting shell.

[0010] As a preferred solution of the present invention, the switching assembly includes an alloy steel spring fixedly connected to the outer cylinder, the inner cylinder is provided with a first docking groove and a second docking groove, and a clamping block is fixedly connected to the alloy steel spring.

[0011] As a preferred solution of the present invention, the connecting assembly includes a swivel ring rotatably mounted on a second fixed ring, a second side plate is fixedly connected to the swivel ring, connecting plates are fixedly arranged on the upper and lower sides of the second side plate, a groove is provided on the connecting plate below the second side plate, an electric push rod is installed in the groove, a rubber pad is installed on the second side plate, a recessed structure is arranged in the middle of the rubber pad, and the connecting plate below the second side plate is suitable for abutting against the first side plate when the outer cylinder rotates counterclockwise.

[0012] As a preferred solution of the present invention, the first driving assembly includes a worm gear fixedly connected to the inner cylinder, a lap plate is rotatably mounted on the outer cylinder, a second motor is mounted below the lap plate, a worm is connected to the output shaft of the second motor, the worm and the worm wheel are meshingly connected, and the rear side of the rotating rod is rotatably connected to the worm wheel.

[0013] As a preferred solution of the present invention, the second driving assembly includes a lap rod fixedly connected to the top of the second fixing ring, a third motor is installed on the lap rod, a first transmission wheel is connected to the output shaft of the third motor, a second transmission wheel is arranged below the first transmission wheel, and the second transmission wheel is fixedly connected to the outer cylinder and the lap plate.

[0014] A separation and purification process for isomerizing tetramethylbenzene to prepare durene comprises the following steps:

[0015] S1: The base, the first bracket, the second bracket, the first fixing ring and the second fixing ring are used to support the outer cylinder. The inner cylinder in the outer cylinder is driven to rotate by the first driving assembly so that the two groups of through holes on the outer cylinder and the inner cylinder are staggered, and the solution to be separated and purified is added into the first curved pipe;

[0016] S2: After the electric heating plate is powered on, the solution in the inner tube is heated, and the generated gas is discharged into the second elbow through the exhaust pipe above the first connecting tube, thereby heating the first elbow in the second elbow, so that the continuously added solution can be preheated, and finally the gas is discharged from the exhaust hole at the bottom of the second elbow;

[0017] S3: During the separation and purification process, the second driving component drives the inner cylinder as a whole to rotate on the first fixed ring and the second fixed ring. During the purification process, the solution will continue to flow inside the inner cylinder, and then the pushing component will scrape off the crystals on the inner wall of the inner cylinder. Then, the first driving component will align the two sets of through holes on the outer cylinder and the inner cylinder, and the crystallized durenyl will fall from the gap between the first side plate and the connecting component onto the conveyor belt, and be transported to the collection area through the conveyor belt;

[0018] S4: The inner cylinder will press against the connecting component during continuous rotation, so that the connecting component always tends to rotate counterclockwise, thereby keeping the connecting component and the bottom of the first side plate in an extruded state. The connecting component can adjust the distance between itself and the first side plate in real time, thereby squeezing the crystals falling from the through hole, so that the purified tetramethylbenzene can maintain a suitable size.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. By setting the first connecting tube, exhaust pipe, first elbow, second elbow and connecting pipe, after the device heats the solution, the steam generated will be sent into the cavity between the first elbow and the second elbow through the exhaust pipe, so that the first elbow is heated. When the first elbow is heated, the incoming solution can be preheated, realizing the function of waste heat recovery and utilization, and solving the problem that the existing tetramethylbenzene separation and purification device cannot use the generated steam to preheat the raw materials during the purification process.

[0021] 2. Through the connecting assembly and the second driving assembly on the device, the third motor on the second driving assembly drives the first transmission wheel to rotate, and the first transmission wheel drives the second transmission wheel and the outer cylinder to rotate. During the rotation of the outer cylinder, the second side plate can be driven to rotate until the connecting plate at the bottom of the second side plate abuts against the bottom of the first side plate, and the second side plate stops rotating. At this time, by adjusting the elongation of the electric push rod, the device can change the spacing between the connecting plate at the bottom of the second side plate and the bottom of the first side plate, thereby realizing the function of controlling the blanking range, so that the crystals produced after separation and purification can be blanked within a specific range in the subsequent process, which solves the problem that the existing tetramethylbenzene separation and purification device cannot limit the blanking range, and in the process of the second driving assembly driving the outer cylinder to rotate continuously, due to the friction contact between the outer cylinder and the rubber pad, the device can switch between different through-hole discharges and change the discharge position, and can also use the electric push rod to limit the discharge size, which solves the problem that the existing tetramethylbenzene separation and purification device cannot automatically switch to a discharge mode under a specific size during the process of changing the discharge position. The device can intermittently extend or shorten the electric push rod, so that the gap of the blanking material can be intermittently increased or decreased, thereby squeezing and crushing larger crystals, thereby enhancing the functionality of the device.

[0022] 3. Through the set pushing assembly and the second connecting shell, during the operation of the device, the first motor drives the rotating rod and the pushing plate to rotate continuously, and cooperates with the overall rotation of the outer cylinder to make the solution evenly spread on various positions of the inner wall of the inner cylinder to form crystals later. After being heated by the electric heating plate, the crystals will adhere to the inner wall of the inner cylinder. Through the continuous rotation of the pushing plate, not only can the crystals on the inner wall of the inner cylinder be scraped off, but also through the forward or reverse rotation of the first motor, the crystals can not only be scraped off from the inner wall of the inner cylinder, but also can be continuously transported, which solves the problem that the existing tetramethylbenzene separation and purification device cannot use the pushing structure to scrape the crystals on the inner wall of the cylinder.

[0023] 4. By setting up a switching component and a first driving component, the first driving component can be used to drive the inner cylinder to rotate and keep the outer cylinder stationary, so that the device switches the staggered manner of the through holes on the outer cylinder and the inner cylinder. When the through holes on the inner cylinder and the outer cylinder overlap with each other, the crystallization discharge function can be realized. When the through holes on the outer cylinder and the inner cylinder do not overlap with each other, the solution inside the inner cylinder can be heated, thereby realizing the separation and purification function, which enhances the convenience of the device when used. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below in combination with the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0025] Figure 1 It is a schematic diagram of the overall structure of a separation and purification device for isomerizing tetramethylbenzene to produce durene according to the present invention;

[0026] Figure 2 yes Figure 1 A magnified schematic diagram of the structure at center A;

[0027] Figure 3 yes Figure 1 A magnified schematic diagram of the structure at B in the middle;

[0028] Figure 4 It is a schematic diagram of the connection structure of the first elbow and the second elbow of the present invention;

[0029] Figure 5 It is a schematic diagram of the split structure of the connection assembly and the second fixing ring of the present invention;

[0030] Figure 6 yes Figure 5 A magnified schematic diagram of the structure at C in the middle;

[0031] Figure 7 yes Figure 5A magnified schematic diagram of the structure at D in the middle;

[0032] Figure 8 It is a schematic diagram of the structure of the pusher assembly of the present invention;

[0033] Fig. 9 yes Figure 8 A magnified schematic diagram of the structure at E in the middle;

[0034] Fig.10 It is a schematic diagram of the outer cylinder and the outer cylinder connection structure of the present invention.

[0035] Figure numerals: 1, base; 2, conveyor belt; 3, first bracket; 4, second bracket; 5, first fixing ring; 6, second fixing ring; 7, first connecting tube; 8, exhaust pipe; 9, first elbow; 10, second elbow; 11, first side plate; 12, support plate; 13, connecting tube; 14, first connecting shell; 15, outer tube; 16, inner tube; 17, through hole; 18, electric heating plate; 19, conductive ring; 20, convex ring; 21, first conductive block; 22, second conductive block; 23, second connecting shell; 24, pusher assembly; 2401, folding rod; 2402, rotating rod; 2403, pusher plate; 2404, scraper; 2405, first motor; 2406, fixed plate; 25, switching assembly; 2501, alloy steel spring; 2502, first docking groove; 2503, second docking groove; 2504, clamping block; 26, connecting assembly; 2601, second side plate; 2602, connecting plate; 2603, electric push rod; 2604, rubber pad; 2605, groove; 2606, swivel; 27, first drive assembly; 2701, lap plate; 2702, second motor; 2703, worm; 2704, worm wheel; 28, second drive assembly; 2801, lap rod; 2802, third motor; 2803, first transmission wheel; 2804, second transmission wheel; 29, exhaust hole. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] Secondly, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0039] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0040] like Figure 1-Figure 10As shown, a separation and purification device for isomerizing tetramethylbenzene to prepare tetramethylbenzene comprises a base 1, a first bracket 3 is fixedly connected to the base 1, a second bracket 4 is arranged at the rear side of the base 1, a conveyor belt 2 is installed between the second bracket 4 and the base 1, and the conveyor belt 2 is convenient for collecting and transporting the discharged crystals in the subsequent process, a first fixing ring 5 is installed above the first bracket 3, a second fixing ring 6 is installed above the second bracket 4, the first bracket 3 and the second bracket 4 are used to support the first fixing ring 5 and the second fixing ring 6, an outer cylinder 15 is rotatably installed between the first fixing ring 5 and the second fixing ring 6, and the first fixing ring 5 and the second fixing ring 6 are used to support the outer cylinder 15 without affecting the normal rotation of the outer cylinder 15. The first side plate 11 and the connecting component 26 are respectively arranged on both sides of the outer cylinder 15. During the continuous rotation of the outer cylinder 15, the bottom of the connecting component 26 will be driven to abut against the bottom of the first side plate 11. The connecting component 26 can change the distance between itself and the bottom of the first side plate 11, thereby changing the size of the crystal falling material. The inner cylinder 16 is rotatably arranged in the outer cylinder 15. Through holes 17 are opened on the outer cylinder 15 and the inner cylinder 16. The outer cylinder 15 and the inner cylinder 16 are provided with a switching component 25. The switching component 25 is used to change the outer cylinder 15. The angle difference between the outer cylinder 15 and the inner cylinder 16 is adjusted to change the staggered range of the through holes 17 on the outer cylinder 15 and the inner cylinder 16, so as to adjust the sealing effect of the outer cylinder 15 and the inner cylinder 16. The outer cylinder 15 is provided with an electric heating plate 18. The front side of the outer cylinder 15 is provided with a first connecting shell 14. The first connecting cylinder 7 is rotatably provided in the first connecting shell 14. The exhaust pipe 8 and the first elbow 9 are provided on the first connecting cylinder 7. The inner cylinder 16 is provided with a push assembly 24. The rear side of the inner cylinder 16 is provided with a first driving assembly 27. The first driving assembly 27 cooperates with the push assembly 24 to not only realize the push function, but also can push the inner cylinder 16. The crystals on the inner wall are scraped off to enhance the convenience of using the device. A second drive assembly 28 is installed on the outer cylinder 15, a support plate 12 is installed on the base 1, and the support plate 12 and the first connecting cylinder 7 are fixedly connected. A second bend 10 is arranged on the outer side of the first bend 9, and a connecting pipe 13 is installed on the exhaust pipe 8. The connecting pipe 13 is connected to the interior of the second bend 10, and an exhaust hole 29 is arranged below the second bend 10. The steam generated during the separation and purification process will be discharged into the gap between the first bend 9 and the second bend 10 through the exhaust pipe 8, thereby preheating the solution in the first bend 9.

[0041] In this embodiment, a second connecting shell 23 is fixedly connected to the inner cylinder 16, the central axes of the outer cylinder 15 and the inner cylinder 16 are collinear, and the outer wall of the second connecting shell 23 fits with the inner wall of the first connecting shell 14 to ensure that the inner cylinder 16 and the second connecting shell 23 can rotate smoothly inside the outer cylinder 15 and the first connecting shell 14, and a convex ring 20 is fixedly connected to the outer cylinder 15, and the convex ring 20 is rotatably connected to the first fixing ring 5 and the second fixing ring 6 to ensure that the outer cylinder 15 and the convex ring 20 can rotate stably on the first fixing ring 5 and the second fixing ring 6, so that the solution in the device is evenly covered on the inner wall of the inner cylinder 16, thereby improving the separation and purification efficiency.

[0042] In this embodiment, the electric heating plates 18 are evenly spaced on the outer cylinder 15, a conductive ring 19 is provided in the middle of the electric heating plate 18, a second conductive block 22 is provided above the conductive ring 19, and the second conductive block 22 is a spherical structure. The second conductive block 22 is rotatably mounted inside the first conductive block 21, and the first conductive block 21 and the first side plate 11 are fixedly connected. When the electric heating plate 18 continues to rotate with the outer cylinder 15, the second conductive block 22 will always maintain contact with the conductive ring 19, so that after the first conductive block 21 is energized, the outer cylinder 15 will always maintain a heating state while rotating.

[0043] In this embodiment, the pushing assembly 24 includes a first motor 2405 fixedly connected to the bottom of the fixed plate 2406, and a rotating rod 2402 is connected to the output shaft of the first motor 2405, and a pushing plate 2403 is connected to the rotating rod 2402. The rotating rod 2402 and the pushing plate 2403 are driven to rotate by the first motor 2405, which can not only realize the pushing function, but also can scrape off the crystals on the inner wall of the device.

[0044] In this embodiment, a folding rod 2401 is fixedly connected to the front side of the rotating rod 2402, and a scraper 2404 is fixedly connected to the folding rod 2401. The scraper 2404 and the second connecting shell 23 are in contact with each other. The scraper 2404 and the folding rod 2401 can continue to rotate when the rotating rod 2402 rotates, thereby scraping off the crystals on the inner wall of the second connecting shell 23.

[0045] In this embodiment, the switching assembly 25 includes an alloy steel spring 2501 fixedly connected to the outer cylinder 15, and a first docking groove 2502 and a second docking groove 2503 are provided on the inner cylinder 16. A clamping block 2504 is fixedly connected to the alloy steel spring 2501. The alloy steel spring 2501 has good high temperature resistance so that it can remain stable when the clamping block 2504 is docked with the first docking groove 2502 or the second docking groove 2503, thereby enhancing the overall stability of the device.

[0046] In this embodiment, the connection assembly 26 includes a rotating ring 2606 rotatably mounted on the second fixing ring 6, the second side plate 2601 is fixedly connected to the rotating ring 2606, and the second side plate 2601 is fixedly provided with connection plates 2602 on both upper and lower sides, a groove 2605 is provided on the connection plate 2602 below the second side plate 2601, and an electric push rod 2603 is installed in the groove 2605, a rubber pad 2604 is installed on the second side plate 2601, and the middle of the rubber pad 2604 is provided with a concave structure, and the connection plate 2602 below the second side plate 2601 is suitable for abutting against the first side plate 11 when the outer cylinder 15 rotates counterclockwise. Figure 7 It can be seen that after the second side plate 2601 is installed, it will always be in frictional contact with the outer cylinder 15, so that when the outer cylinder 15 rotates counterclockwise, it drives the second side plate 2601 to rotate. By adjusting the extension of the electric push rod 2603, a suitable gap can be retained between the connecting plate 2602 at the bottom of the second side plate 2601 and the first side plate 11 for the separated and purified tetramethylbenzene to pass through.

[0047] In this embodiment, the first driving assembly 27 includes a worm gear 2704 fixedly connected to the inner cylinder 16, a lap plate 2701 is rotatably installed on the outer cylinder 15, a second motor 2702 is installed below the lap plate 2701, a worm 2703 is connected to the output shaft of the second motor 2702, the worm 2703 and the worm gear 2704 are meshingly connected, and the rear side of the rotating rod 2402 and the worm gear 2704 are rotatably connected to ensure that the rotating rod 2402 or the worm gear 2704 do not affect each other when rotating, ensure the stability of the device during operation and keep the solution in the device from flowing out. The device drives the worm 2703 to rotate by the second motor 2702, thereby driving the worm gear 2704 and the inner cylinder 16 to rotate, thereby changing the angle difference between the inner cylinder 16 and the outer cylinder 15, so as to subsequently adjust the closed state of the inner cylinder 16 and the outer cylinder 15.

[0048] In this embodiment, the second driving assembly 28 includes a lap rod 2801 fixedly connected to the top of the second fixed ring 6, a third motor 2802 is installed on the lap rod 2801, a first transmission wheel 2803 is connected to the output shaft of the third motor 2802, a second transmission wheel 2804 is arranged below the first transmission wheel 2803, the second transmission wheel 2804 is fixedly connected to the outer cylinder 15 and the lap plate 2701, the first transmission wheel 2803 is driven to rotate by the third motor 2802, the first transmission wheel 2803 is used to drive the second transmission wheel 2804 and the outer cylinder 15 to rotate, and the outer cylinder 15 can enable the solution in the device to continue to flow during the rotation process.

[0049] It should be noted that the present invention is a separation and purification device and process for isomerizing tetramethylbenzene to produce durene. First, Figure 1 , Figure 3 , Figure 5and Figure 6 As shown, the base 1 and the support plate 12 are used to support the first connecting tube 7, the first bracket 3 and the second bracket 4 are used to support the first fixing ring 5 and the second fixing ring 6, the first fixing ring 5 and the second fixing ring 6 are used to support the outer tube 15, the lap plate 2701 on the first driving assembly 27 is fixed to the top of the wall, and the worm 2703 is driven to rotate by the second motor 2702 on the lap plate 2701, driving the worm wheel 2704 and the inner tube 16 to rotate, thereby changing the angle difference between the inner tube 16 and the outer tube 15, so that the staggered state of the through holes 17 on the outer tube 15 and the inner tube 16 changes, thereby adjusting the closed state of the inner tube 16 and the outer tube 15, when the two groups of through holes 17 on the outer tube 15 and the inner tube 16 overlap, discharge can be carried out, and after the two groups of through holes 17 on the outer tube 15 and the inner tube 16 are separated, the solution can be heated and separated and purified. After the two groups of through holes 17 on the outer tube 15 and the inner tube 16 are staggered, the outer tube 15 and the inner tube 16 remain in a closed state, and the solution to be separated and purified can be added to the first elbow 9. Figure 1-Figure 4 , Figure 8 and Fig. 9 Since, after the electric heating plate 18 is powered on, the second conductive block 22 is a spherical structure and is rotatably installed inside the first conductive block 21, after the first conductive block 21 is powered on, when the outer cylinder 15 continues to rotate, the second conductive block 22 is always connected to the conductive ring 19 on the electric heating plate 18, thereby continuously heating the solution in the inner cylinder 16, and the steam will be discharged into the second elbow 10 through the exhaust pipe 8 above the first connecting cylinder 7, thereby heating the first elbow 9 in the second elbow 10, so that the continuously added solution can be preheated, and finally the gas will be discharged from the exhaust hole 29 at the bottom of the second elbow 10.

[0050] like Figure 1 and Figure 5-Figure 10 As shown, during the separation and purification process, the first transmission wheel 2803 is driven to rotate by the third motor 2802 on the second driving assembly 28, and the first transmission wheel 2803 is used to drive the second transmission wheel 2804 and the outer cylinder 15 to rotate. During the rotation of the outer cylinder 15, the solution in the device can continue to flow. As the inner cylinder 16 is continuously heated, crystals will adhere to the inner cylinder 16 and the inner wall of the second connecting shell 23, and then the first motor 2405 on the pushing assembly 24 drives the rotating rod 2402 and the pushing plate 2403 to rotate. The scraper 2404 and the folding rod 2401 can continue to rotate when the rotating rod 2402 rotates, thereby scraping off the crystals attached to the inner wall of the second connecting shell 23 and the inner wall of the inner cylinder 16. At this time, the second driving assembly 28 can be kept stationary, so that the outer cylinder 15 remains fixed, and the worm 2703 is driven to rotate by the second motor 2702, which drives the worm wheel 2704 and the inner cylinder 16 to rotate, so that the two groups of through holes 17 on the outer cylinder 15 and the inner cylinder 16 are aligned, as shown in FIG. Fig.10As shown, at this time, the alloy steel spring 2501 on the switching component 25 abuts against the block 2504, and the block 2504 abuts against the inner wall of the first docking groove 2502. The crystallized tetramethylbenzene will fall from the gap between the first side plate 11 and the connecting component 26 onto the conveyor belt 2 and be transported to the collection area through the conveyor belt 2. During the continuous rotation, the inner cylinder 16 will press against the rubber pad 2604 on the connecting assembly 26. Therefore, after the second side plate 2601 is installed, it will always be in friction contact with the outer cylinder 15, so that the second side plate 2601 and the connecting plate 2602 on the connecting assembly 26 always have a tendency to rotate counterclockwise. The second side plate 2601 can be continuously rotated on the second fixed ring 6 through the rotating ring 2606. When the outer cylinder 15 rotates counterclockwise, it drives the second side plate 2601 to rotate. By adjusting the extension of the electric push rod 2603, a suitable gap can be retained between the connecting plate 2602 at the bottom of the second side plate 2601 and the first side plate 11 for the discharge of the separated and purified tetramethylbenzene.

[0051] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A separation and purification device for isomerizing tetramethylbenzene to produce durene, comprising a base (1), characterized in that: A first bracket (3) is fixedly connected to the base (1), a second bracket (4) is arranged at the rear side of the base (1), a conveyor belt (2) is installed between the second bracket (4) and the base (1), a first fixing ring (5) is installed above the first bracket (3), a second fixing ring (6) is installed above the second bracket (4), an outer cylinder (15) is rotatably installed between the first fixing ring (5) and the second fixing ring (6), first side plates (11) and a connection assembly (26) are respectively arranged on both sides of the outer cylinder (15), an inner cylinder (16) is rotatably arranged inside the outer cylinder (15), and the outer cylinder (15) A through hole (17) is provided on each of the outer cylinder (15) and the inner cylinder (16); a switching assembly (25) is provided on the outer cylinder (15) and the inner cylinder (16); an electric heating plate (18) is installed on the outer cylinder (15); a first connecting shell (14) is installed on the front side of the outer cylinder (15); a first connecting cylinder (7) is rotatably arranged in the first connecting shell (14); an exhaust pipe (8) and a first curved pipe (9) are installed on the first connecting cylinder (7); a pushing assembly (24) is installed in the inner cylinder (16); a first driving assembly (27) is provided on the rear side of the inner cylinder (16); and a second driving assembly (28) is installed on the outer cylinder (15); A support plate (12) is mounted on the base (1), the support plate (12) and the first connecting tube (7) are fixedly connected, a second curved tube (10) is arranged outside the first curved tube (9), a connecting tube (13) is mounted on the exhaust pipe (8), the connecting tube (13) is connected to the inside of the second curved tube (10), and an exhaust hole (29) is arranged below the second curved tube (10); The connection assembly (26) comprises a rotating ring (2606) rotatably mounted on the second fixed ring (6); the rotating ring (2606) is fixedly connected to the second side plate (2601); connection plates (2602) are fixedly arranged on the upper and lower sides of the second side plate (2601); a groove (2605) is provided on the connection plate (2602) below the second side plate (2601); an electric push rod (2603) is installed in the groove (2605); a rubber pad (2604) is installed on the second side plate (2601); the middle of the rubber pad (2604) is arranged as a concave structure; the connection plate (2602) below the second side plate (2601) is suitable for abutting against the first side plate (11) when the outer cylinder (15) rotates counterclockwise.

2. A separation and purification device for isomerization of tetramethylbenzene to durene according to claim 1, characterized in that: A second connecting shell (23) is fixedly connected to the inner cylinder (16); the central axes of the outer cylinder (15) and the inner cylinder (16) are collinear; the outer wall of the second connecting shell (23) and the inner wall of the first connecting shell (14) are in contact with each other; a convex ring (20) is fixedly connected to the outer cylinder (15); and the convex ring (20) is rotatably connected to the first fixing ring (5) and the second fixing ring (6).

3. A separation and purification device for isomerization of tetramethylbenzene to durene according to claim 1, characterized in that: The electric heating plates (18) are evenly spaced on the outer cylinder (15); a conductive ring (19) is arranged in the middle of the electric heating plates (18); a second conductive block (22) is arranged above the conductive ring (19); the second conductive block (22) is a spherical structure; the second conductive block (22) is rotatably mounted inside the first conductive block (21); and the first conductive block (21) and the first side plate (11) are fixedly connected.

4. A separation and purification device for isomerization of tetramethylbenzene to durene according to claim 3, characterized in that: The pusher assembly (24) comprises a first motor (2405) fixedly connected below a fixed plate (2406); a rotating rod (2402) is connected to an output shaft of the first motor (2405); and a pusher plate (2403) is connected to the rotating rod (2402).

5. A separation and purification device for isomerization of tetramethylbenzene to durene according to claim 4, characterized in that: The front side of the rotating rod (2402) is fixedly connected to a folding rod (2401), the folding rod (2401) is fixedly connected to a scraper (2404), and the scraper (2404) and the second connecting shell (23) are in contact with each other.

6. The separation and purification device for isomerization of tetramethylbenzene to durene according to claim 1, characterized in that: The switching assembly (25) comprises an alloy steel spring (2501) fixedly connected to the outer cylinder (15); a first docking groove (2502) and a second docking groove (2503) are provided on the inner cylinder (16); and a clamping block (2504) is fixedly connected to the alloy steel spring (2501).

7. The separation and purification device for isomerization of tetramethylbenzene to durene according to claim 5, characterized in that: The first driving assembly (27) comprises a worm wheel (2704) fixedly connected to the inner cylinder (16); a lap plate (2701) is rotatably mounted on the outer cylinder (15); a second motor (2702) is mounted below the lap plate (2701); a worm (2703) is connected to the output shaft of the second motor (2702); the worm (2703) and the worm wheel (2704) are meshingly connected; and the rear side of the rotating rod (2402) is rotatably connected to the worm wheel (2704).

8. The separation and purification device for isomerization of tetramethylbenzene to durene according to claim 1, characterized in that: The second driving assembly (28) comprises a lap rod (2801) fixedly connected to the top of the second fixing ring (6); a third motor (2802) is mounted on the lap rod (2801); a first transmission wheel (2803) is connected to the output shaft of the third motor (2802); a second transmission wheel (2804) is arranged below the first transmission wheel (2803); and the second transmission wheel (2804) is fixedly connected to the outer cylinder (15) and the lap plate (2701).

9. A separation and purification process for isomerizing tetramethylbenzene to produce durene, using the separation and purification device for isomerizing tetramethylbenzene to produce durene according to claim 1, characterized in that: The following steps are involved: S1: The base (1), the first bracket (3), the second bracket (4), the first fixing ring (5) and the second fixing ring (6) are used to support the outer cylinder (15). The inner cylinder (16) in the outer cylinder (15) is driven to rotate by the first driving assembly (27) so that the two groups of through holes (17) on the outer cylinder (15) and the inner cylinder (16) are staggered, and the solution to be separated and purified is added into the first curved pipe (9); S2: After the electric heating plate (18) is powered on, the solution in the inner tube (16) is heated, and the generated gas is discharged into the second curved tube (10) through the exhaust pipe (8) above the first connecting tube (7), thereby heating the first curved tube (9) in the second curved tube (10), so that the continuously added solution can be preheated, and finally the gas is discharged from the exhaust hole (29) at the bottom of the second curved tube (10); S3: During the separation and purification process, the second driving component (28) drives the inner cylinder (16) to rotate as a whole on the first fixed ring (5) and the second fixed ring (6). During the purification process, the solution will continue to flow inside the inner cylinder (16). Then, the pushing component (24) scrapes off the crystals on the inner wall of the inner cylinder (16). Then, the first driving component (27) aligns the two sets of through holes (17) on the outer cylinder (15) and the inner cylinder (16). The crystallized durenyl will fall from the gap between the first side plate (11) and the connecting component (26) onto the conveyor belt (2), and be transported to the collection area through the conveyor belt (2); S4: During the continuous rotation of the inner cylinder (16), the inner cylinder (16) will press against the connecting component (26), so that the connecting component (26) always tends to rotate counterclockwise, thereby keeping the connecting component (26) and the bottom of the first side plate (11) in an extruded state. The connecting component (26) can adjust the distance between itself and the first side plate (11) in real time, thereby squeezing the crystals falling from the through hole (17), so that the purified durenyl can maintain a suitable size.

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