A scraped surface evaporator for the rectification of methyl anthranilate

Abstract

The utility model relates to a kind of methyl anthranilate rectification with scraper type evaporator, belong to rectification equipment technical field, including evaporation cylinder, the outside of evaporation cylinder is equipped with heating jacket, evaporation cylinder is equipped with shaft, the shaft is equipped with scraper assembly, the bottom of evaporation cylinder is equipped with discharge pipe, the top of evaporation cylinder is equipped with gas outlet pipe, the shaft above scraper assembly is fixed with conical distribution disc, the top of distribution disc is covered with distribution cylinder, the bottom of distribution cylinder is equipped with distribution turn-up parallel with the outside wall of distribution disc, gap is equipped between distribution turn-up and distribution disc, the outside of distribution cylinder is fixed on evaporation cylinder, the upper portion of distribution cylinder is fixedly connected with feed pipe, the sidewall of evaporation cylinder above distribution cylinder is fixed with multiple baffle plates, baffle plate top is equipped with wire mesh demister fixed on the shaft.The utility model is favorable to form uniform liquid film in evaporation cylinder body, improve evaporation efficiency, better remove liquid droplet entrained in steam, improve gas-liquid separation effect.

Description

Technical Field

[0001] This utility model belongs to the technical field of distillation equipment, specifically relating to a scraped evaporator for the distillation of methyl anthranilate. Background Technology

[0002] In the distillation production of methyl anthranilate, the scraped-plate evaporator is one of the core pieces of equipment. However, existing scraped-plate evaporators have several problems when processing methyl anthranilate. First, the material is unevenly distributed within the evaporator, leading to low evaporation efficiency and affecting the distillation quality and yield of methyl anthranilate. Second, the gas-liquid separation effect is unsatisfactory; the secondary steam often carries a significant amount of incompletely separated liquid material, which not only reduces product yield but may also damage subsequent steam treatment equipment. Utility Model Content

[0003] Therefore, it is necessary to provide a scraped evaporator for the distillation of methyl anthranilate, addressing the problems of the existing technology.

[0004] To solve the problems of the existing technology, the technical solution adopted by this utility model is as follows:

[0005] A scraped-plate evaporator for distilling methyl anthranilate includes an evaporating cylinder with a heating jacket on its exterior. A rotating shaft is located inside the evaporating cylinder, and a scraper assembly is mounted on the shaft. A drive motor is connected to the top of the rotating shaft. A discharge pipe is located at the bottom of the evaporating cylinder, and a gas outlet pipe is located at the top. A conical distribution plate is fixed on the rotating shaft above the scraper assembly. A distribution cylinder is fitted onto the top of the distribution plate. The bottom of the distribution cylinder has a distribution flange parallel to the outer wall of the distribution plate, with a gap between the distribution flange and the distribution plate. The outer side of the distribution cylinder is fixed to the evaporating cylinder. A feed pipe is fixedly connected to the upper part of the distribution cylinder. Multiple baffles are fixed on the side wall of the evaporating cylinder above the distribution cylinder. A wire mesh demister is fixed on the rotating shaft above the baffles.

[0006] As a preferred embodiment, a support rod is fixed on the outer wall of the dispensing cylinder, and the outer end of the support rod is fixed to the evaporation cylinder, which facilitates the fixing and support of the dispensing cylinder.

[0007] As a preferred embodiment, the scraper assembly includes multiple fixed sleeves axially fitted along the rotating shaft. Each fixed sleeve has multiple supporting ribs welded to its outer wall. A mounting ring plate is welded to the outer end of each supporting rib. At least two U-shaped fixed plates are fixedly connected to the outer walls of adjacent mounting ring plates. Each fixed plate contains a detachable movable scraper secured by bolts. The movable scraper can be disassembled for easy replacement, and its installation within the fixed plates, which connect to adjacent mounting ring plates, makes the scraper assembly structure more stable.

[0008] As a preferred option, the adjacent movable scrapers in the vertical direction are staggered to increase the scraping effect. The outer wall of the mounting ring plate is provided with a U-shaped fixing groove. The fixing plate is fixed in the fixing groove on the side away from the opening, which facilitates the installation and fixation of the fixing plate.

[0009] As a preferred option, the rear side of the fixing plate is provided with a reinforcing flange, which is welded and fixed to the end of the mounting ring plate, making the fixing plate more secure.

[0010] As a preferred option, multiple mounting ring plates are provided with multiple corresponding fixing holes along the vertical direction. Reinforcing rods are fixed in the multiple fixing holes. Multiple reinforcing rods are arranged in a circular array along the central axis of the rotating shaft, which can fix multiple mounting ring plates into a whole, making the structure more stable.

[0011] As a preferred embodiment, the evaporator includes an upper cylinder, at least one intermediate cylinder, and a lower cylinder connected sequentially by flanges. The top of the upper cylinder is fixed with a cover plate via a flange, the gas outlet pipe is located on the cover plate, and the material outlet pipe is located on the lower cylinder. This split structure facilitates manufacturing and installation. A coupling is provided on the rotating shaft below the baffle plate, and a manhole is provided on the upper cylinder outside the coupling. The top and bottom of the distribution plate are provided with fixing sleeves, which are fixed to the rotating shaft by bolts. The heating jacket is located on the outside of the intermediate cylinder, and the scraper assembly is located inside the intermediate cylinder. This facilitates the disassembly of the upper cylinder, thereby facilitating the replacement of the movable scraper.

[0012] The advantages of this utility model compared with the prior art are:

[0013] After entering the distribution cylinder through the feed pipe, the material passes through the distribution gaps and reaches the distribution tray. The distribution gaps provide initial dispersion, ensuring that the material is not concentrated at a single point upon reaching the distribution tray, but rather spread out over a certain area. The distribution tray then uses its own rotation to further evenly distribute the material towards the inner wall of the evaporator, which helps form a uniform liquid film within the evaporator and improves evaporation efficiency. By installing baffles at the top of the evaporator, the gas flow through the gaps between adjacent baffles increases collisions, initially removing liquid droplets from the gas. Then, as the gas passes through the rotating wire mesh demister, it further removes liquid droplets entrained in the steam, improving the gas-liquid separation effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 yes Figure 1 Partial structural diagram Figure 1 ;

[0016] Figure 3 yes Figure 1 Partial structural diagram Figure 2 ;

[0017] Figure 4 This is a schematic diagram of the top structure of the mounting ring plate;

[0018] The numbers on the map are:

[0019] 1. Drive motor; 2. Rotating shaft; 3. Air outlet pipe; 4. Cover plate; 5. Wire mesh demister; 6. Baffle plate; 7. Distributor cylinder; 8. Lower cylinder; 9. Coupling; 10. Upper cylinder; 11. Feed pipe; 12. Heating jacket; 13. Distributor plate; 14. Intermediate cylinder; 15. Movable scraper; 16. Support rib plate; 17. Mounting ring plate; 18. Reinforcing flange; 19. Fixing plate; 20. Reinforcing rod; 21. Fixing bolt; 22. Fixing sleeve; 23. Discharge pipe. Detailed Implementation

[0020] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0021] Example 1, Reference Figures 1 to 4 A scraped evaporator for distilling methyl anthranilate includes an evaporating cylinder, a heating jacket 12 on the outside of the evaporating cylinder, a rotating shaft 2 inside the evaporating cylinder, a scraper assembly on the rotating shaft 2, a drive motor 1 connected to the top of the rotating shaft 2, a discharge pipe 23 at the bottom of the evaporating cylinder, an exhaust pipe 3 at the top of the evaporating cylinder, a conical distribution plate 13 fixed on the rotating shaft 2 above the scraper assembly, a distribution cylinder 7 fitted on the top of the distribution plate 13, a distribution flange parallel to the outer wall of the distribution plate 13 at the bottom of the distribution cylinder 7, a gap between the distribution flange and the distribution plate 13, the outer side of the distribution cylinder 7 fixed to the evaporating cylinder, a feed pipe 11 fixedly connected to the upper part of the distribution cylinder 7, multiple baffles 6 fixed on the side wall of the evaporating cylinder above the distribution cylinder 7, and a wire mesh demister 5 fixed on the rotating shaft 2 above the baffles 6.

[0022] During operation, methyl anthranilate material enters the distribution cylinder 7 through the feed pipe 11, and then flows evenly onto the distribution plate 13 through the gap between the distribution flange and the distribution plate 13. The distribution gap can play a preliminary role in dispersing the material, so that the material is not concentrated at one point when it reaches the distribution plate 13, but is dispersed over a certain range. Then the material is thrown onto the inner wall of the evaporation cylinder by the distribution plate 13. Under the action of gravity, the material flows downward on the inner wall of the evaporation cylinder. At this time, the rotating scraper assembly is evenly distributed on the inner wall of the evaporation cylinder to form a downward swirling film, and is continuously evaporated and concentrated during the descent. The finished liquid is discharged from the bottom discharge pipe 23, and the secondary steam flows upward. When it passes through the gap of the baffle plate 6, the collision can be increased, and the liquid droplets in the gas can be initially removed. Then, when the gas passes through the rotating wire mesh demister 5, the liquid droplets entrained in the steam are further removed, improving the gas-liquid separation effect. Finally, the gas is discharged from the gas outlet pipe 3.

[0023] In Example 2, based on Example 1, a support rod is fixed on the outer wall of the dispensing cylinder 7, and the outer end of the support rod is fixed to the evaporation cylinder.

[0024] The scraper assembly includes multiple fixed sleeves 22 axially fitted along the rotating shaft 2. Multiple supporting ribs 16 are welded and fixed to the outer wall of each fixed sleeve 22. A mounting ring plate 17 is welded and fixed to the outer end of each supporting rib 16. At least two U-shaped fixing plates 19 are fixedly connected to the outer wall of adjacent mounting ring plates 17. A detachable movable scraper 15 is fixed to each fixing plate 19 by fixing bolts 21. When installing the movable scraper 15, it is inserted into the U-shaped groove of the fixing plate 19, with the fixing hole of the movable scraper 15 aligned with the fixing hole on the fixing plate 19. Then, fixing bolts 21 are installed in the fixing hole for installation and fixation.

[0025] The vertically adjacent movable scrapers 15 are staggered, and the outer wall of the mounting ring plate 17 is provided with a U-shaped fixing groove. The fixing plate 19 is fixed in the fixing groove on the side away from the opening. (See attached image) Figure 3 and 4 As shown, two movable scrapers 15 symmetrical about the pivot 2 are installed on the adjacent mounting ring plate 17.

[0026] The rear side of the fixing plate 19 is provided with a reinforcing flange 18, which is welded and fixed to the end of the mounting ring plate 17. When welding and fixing the fixing plate 19, the fixing plate 19 is inserted into the U-shaped fixing groove of the mounting ring plate 17, and the reinforcing flange 18 is attached to the end of the mounting ring plate 17, and then the fixing plate 19 can be welded and fixed.

[0027] Multiple mounting ring plates 17 have multiple corresponding fixing holes along the vertical direction, and reinforcing rods 20 are fixed in the multiple fixing holes. Multiple reinforcing rods 20 are arranged in a circular array along the central axis of the rotating shaft 2. During manufacturing, reinforcing rods 20 can be inserted into the multiple fixing holes in the same vertical direction, and then the two ends of the reinforcing rods 20 can be fixed with nuts.

[0028] The evaporator includes an upper cylinder 10, at least one intermediate cylinder 14, and a lower cylinder 8 connected in sequence by flanges. The top of the upper cylinder 10 is fixed with a cover plate 4 by a flange. The gas outlet pipe 3 is installed on the cover plate 4, and the material outlet pipe 23 is installed on the lower cylinder 8. A coupling 9 is installed on the rotating shaft 2 below the baffle plate 6. A manhole is provided on the upper cylinder 10 outside the coupling 9. The top and bottom of the material distribution plate 13 are both provided with fixing sleeves 22. The fixing sleeves 22 are fixed to the rotating shaft 2 by bolts. The heating jacket 12 is installed on the outside of the intermediate cylinder 14, and the scraper assembly is installed inside the intermediate cylinder 14. Each heating jacket 12 is equipped with a heat source inlet pipe and a heat source outlet pipe. A temperature sensor is installed inside the heating jacket 12. The temperature sensor is connected to a controller. The controller is connected to a flow valve set on the heat source inlet pipe. When replacing the movable scraper 15, the manhole can be opened, the coupling 9 can be removed, and then the connecting flange between the upper cylinder 10 and the upper intermediate cylinder 14 can be removed. Then, the upper cylinder 10 can be lifted, and the lower distribution plate 13 can be removed. Enter the intermediate cylinder 14 to remove the movable scraper 15 for replacement.

[0029] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A scraped surface evaporator for the rectification of methyl anthranilate, comprising an evaporation cylinder, the outer part of which is provided with a heating jacket (12), inside which is provided with a rotating shaft (2), on which is provided with a scraper assembly, the top of the rotating shaft (2) is connected with a driving motor (1), the bottom of the evaporation cylinder is provided with a discharge pipe (23), the top of the evaporation cylinder is provided with a gas outlet pipe (3), characterized in that: A conical distribution plate (13) is fixed on the rotating shaft (2) above the scraper assembly. A distribution cylinder (7) is fitted on the top of the distribution plate (13). A distribution flange parallel to the outer wall of the distribution plate (13) is provided at the bottom of the distribution cylinder (7). A gap is provided between the distribution flange and the distribution plate (13). The outer side of the distribution cylinder (7) is fixed on the evaporation cylinder. A feed pipe (11) is fixedly connected to the upper part of the distribution cylinder (7). Multiple baffles (6) are fixed on the side wall of the evaporation cylinder above the distribution cylinder (7). A wire mesh demister (5) is fixed on the rotating shaft (2) above the baffles (6).

2. The wiped film evaporator for the rectification of methyl anthranilate according to claim 1, characterized in that, A support rod is fixed on the outer wall of the dispensing cylinder (7), and the outer end of the support rod is fixed to the evaporation cylinder.

3. The wiped film evaporator for the rectification of methyl anthranilate according to claim 1, characterized in that, The scraper assembly includes multiple fixed sleeves (22) sleeved along the axial direction of the rotating shaft (2). Multiple support ribs (16) are welded and fixed on the outer side wall of each fixed sleeve (22). Mounting ring plates (17) are welded and fixed on the outer end of the support ribs (16). At least two U-shaped fixing plates (19) are fixedly connected on the outer side wall of adjacent mounting ring plates (17). Each fixing plate (19) has a detachable movable scraper (15) fixed in it by fixing bolts (21).

4. The wiped film evaporator for the rectification of methyl anthranilate according to claim 3, characterized in that, The vertically adjacent movable scrapers (15) are staggered, and the outer side wall of the mounting ring plate (17) is provided with a U-shaped fixing groove. The fixing plate (19) is fixed in the fixing groove on the side away from the opening.

5. The wiped film evaporator for the rectification of methyl anthranilate according to claim 4, characterized in that, The rear side of the fixing plate (19) is provided with a reinforcing flange (18), which is welded and fixed to the end of the mounting ring plate (17).

6. The wiped film evaporator for the rectification of methyl anthranilate according to claim 3, characterized in that, Multiple mounting ring plates (17) are provided with multiple corresponding fixing holes in the vertical direction. Reinforcing rods (20) are fixed in the multiple fixing holes. Multiple reinforcing rods (20) are arranged in a circular array along the central axis of the rotating shaft (2).

7. The wiped film evaporator for the rectification of methyl anthranilate according to claim 5, characterized in that, The evaporator includes an upper cylinder (10), at least one intermediate cylinder (14), and a lower cylinder (8) connected in sequence by flanges. The top of the upper cylinder (10) is fixed with a cover plate (4) by a flange. The gas outlet pipe (3) is set on the cover plate (4), and the material outlet pipe (23) is set on the lower cylinder (8). A coupling (9) is provided on the rotating shaft (2) below the baffle plate (6). A manhole is provided on the upper cylinder (10) outside the coupling (9). The top and bottom of the distribution plate (13) are provided with fixing sleeves (22). The fixing sleeves (22) are fixed on the rotating shaft (2) by bolts. The heating jacket (12) is set on the outside of the intermediate cylinder (14), and the scraper assembly is set inside the intermediate cylinder (14).

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