Distillation recovery device for polyarylester production

Abstract

The utility model discloses a distillation recovery device for polyarylester production, which comprises a base, a heating box body is fixedly mounted on the upper side of the base through a support, a plurality of heating plates are fixedly mounted in the heating box body, a first valve is fixedly mounted on the right side of the heating box body, a distillation box body is fixedly mounted on the upper side of the heating box body, and a second valve is fixedly mounted on the right side of the distillation box body. A second valve is fixedly installed on the left lower side of the distillation box body, a filter screen is fixedly installed at the end, close to the distillation box body, of the second valve, a third valve is fixedly installed on the right lower side of the distillation box body, a scraping and stirring device is installed in the distillation box body, and a feeding port is fixedly installed on the right upper side of the distillation box body. According to the mode, after a solvent dichloromethane is recovered, a separation agent ethanol can be continuously distilled and recovered, inner wall crystal substances can be scraped while stirring is carried out, unreacted monomers and polyarylester crystal substances can be filtered, separated and recovered, and the production efficiency is relatively high.

Description

Technical Field

[0001] The utility model relates to the technical field of polyarylate, in particular to a distillation recovery device used for the production of polyarylate. Background Art

[0002] Polyarylate is a polymer compound. In the production process of polyarylate, alcohol separators (such as ethanol) are usually used to form hydrogen bonds with polyarylate to promote crystallization. Solvents are usually needed to help the reactants mix fully and promote the reaction. Commonly used solvents include dichloromethane. In the production or processing of polyarylate, the mixture contains polyarylate itself, unreacted monomers, solvents, separators and possible low molecular weight fragments. When the mixture is heated, due to the different boiling points of the components, the substance with a lower boiling point will vaporize first. For example, the solvent usually has a relatively low boiling point and will first become a gas when heated to a certain temperature. As the temperature rises, the unreacted monomers will also gradually vaporize. By controlling the temperature and pressure conditions of the distillation, the components to be recovered can be vaporized and separated from other high boiling point components. The vaporized substances are cooled and condensed and converted back into liquids, thereby achieving recovery.

[0003] Patent No. CN201822196528.7 proposes a recovery distillation kettle for polyarylate production, including a distillation kettle, a crystallization kettle and a recovery kettle are arranged in the distillation kettle, and the recovery kettle is located in the crystallization kettle, the upper end of the kettle wall of the crystallization kettle and the upper end of the kettle wall of the recovery kettle are fixed on the top surface of the distillation kettle, the distillation kettle is provided with a liquid inlet pipe and a liquid discharge pipe, and the liquid discharge pipe is located at the bottom of the distillation kettle, the crystallization kettle is provided with a discharge pipe and a feed pipe, and the discharge pipe is located at the bottom of the crystallization kettle and passes through the bottom of the distillation kettle and is connected to the ball valve, the feed pipe passes through the distillation kettle and is connected to the feeding device, the recovery kettle is provided with a recovery pipe, and one end of the recovery pipe passes through the distillation kettle and is connected to an external cooling recovery device, through the close combination of the distillation kettle, the crystallization kettle and the recovery kettle, the functions of heating distillation, recovery crystallization and the like are completed, not only the polyarylate crystal particles are obtained, but also the separation agent can be perfectly recovered.

[0004] However, the technical solution of this patent can only recover the separation agent, but cannot recover the solvent and unreacted monomers at the same time, and cannot scrape the crystals on the inner wall while stirring, resulting in low production efficiency.

[0005] Therefore, those skilled in the art provide a distillation recovery device for polyarylate production to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a distillation recovery device for polyarylate production to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A distillation recovery device for polyarylate production, comprising a base, a heating box body is fixedly installed on the upper side of the base through a bracket, a plurality of heating plates are fixedly installed in the heating box body, a first valve is fixedly installed on the right side of the heating box body, a distillation box body is fixedly installed on the upper side of the heating box body, a second valve is fixedly installed on the lower left side of the distillation box body, a filter screen is fixedly installed on one end of the second valve close to the distillation box body, a third valve is fixedly installed on the lower side of the distillation box body, a scraping and stirring device is installed in the distillation box body, and a feed port is fixedly installed on the upper right side of the distillation box body;

[0009] Furthermore, the scraping and stirring device comprises: a first bevel gear, a rotating shell, a second bevel gear, a bevel scraper, a scraping assembly and a driving assembly, wherein the first bevel gear is fixedly mounted on the upper side of the interior of the distillation box, the rotating shell is rotatably connected to the shaft of the first bevel gear, two second bevel gears are symmetrically rotated along the rotating shell and connected to the left and right sides of the rotating shell, and a bevel scraper is fixedly mounted on one end of the rotating shaft of each second bevel gear away from the second bevel gear, the bevel scraper is arc-shaped and fits the bevel of the inner wall of the distillation box, the scraping assembly is mounted on the rotating shell, and the driving assembly is mounted on the distillation box;

[0010] Furthermore, the scraping assembly includes: a rotating rod and a vertical scraper, the rotating rod is fixedly connected to the front and rear side walls of the rotating shell, and one end of each rotating rod away from the rotating shell is fixedly connected to the vertical scraper;

[0011] Furthermore, the driving assembly includes: an auxiliary stirring rod, a driving motor, a first gear and a second gear, wherein the auxiliary stirring rod is fixedly mounted on the lower side of the rotating shell, the driving motor is fixedly mounted on the upper side of the exterior of the distillation box, the first gear is fixedly mounted on the output shaft of the driving motor, the second gear is fixedly mounted on the upper side of the rotating shell, and the second gear and the first gear are meshed with each other;

[0012] Furthermore, a split recovery device is installed on the upper side of the distillation box;

[0013] Furthermore, the split recovery device includes: a three-way joint, a fourth valve, a connecting pipe and a condensing assembly, wherein the three-way joint is fixedly installed on the upper left side of the distillation box, the other two interfaces of the three-way joint are fixedly installed with the fourth valve, the end of the fourth valve away from the three-way joint is fixedly installed with the connecting pipe, and the condensing assembly is installed at the end of the connecting pipe away from the fourth valve;

[0014] Furthermore, the condensation assembly includes: an inner tube, an outer tube and a fifth valve, the left end of the inner tube is fixedly connected to an end of the connecting tube away from the fourth valve, the outer tube is fixedly installed on the inner tube, the fifth valve is fixedly connected to the right end of the inner tube, and the upper left side and the lower right side of the outer tube are fixedly installed with connecting pipes;

[0015] Furthermore, a cooling device is installed on the upper side of the base;

[0016] Furthermore, the cooling device includes: a radiator, a water pump and a cooling fan, the radiator is fixedly mounted on the upper side of the base, the output end of the water pump is fixedly connected to the input end of the radiator, and a plurality of cooling fans are fixedly mounted on the side wall of the radiator;

[0017] Furthermore, the upper left connecting pipes of the two outer tubes are connected to each other through pipes, the lower right connecting pipe of the rear outer tube is fixedly connected to the radiator output end through a pipe, and the lower right connecting pipe of the front outer tube is fixedly connected to the water pump input end through a pipe.

[0018] Compared with the prior art, the utility model has the following beneficial effects: a distillation recovery device for polyarylate production, through the different boiling points of the solvent and the separation agent, the boiling point of dichloromethane is 39.8 degrees, the distillation box is first heated to about 40 degrees, the dichloromethane is evaporated, the third valve on the rear side of the three-way joint is opened, the dichloromethane vapor enters the inner tube of the rear condensation component through the third valve to be condensed and recovered, the third valve on the rear side of the three-way joint is closed, and the third valve on the front side of the three-way joint is opened. The boiling point of ethanol is 78.3 degrees, the distillation box is heated to about 79 degrees, ethanol is evaporated, and the ethanol vapor enters the inner tube of the front condensation component through the third valve to be condensed and recovered, and multi-stage recovery is performed through the split recovery device, which is conducive to the recovery of the separation agent ethanol after the recovery of the solvent dichloromethane, and the production efficiency is high;

[0019] The rotation of the rotating shell drives the two second bevel gears to rotate, and the second bevel gears rotate while following the rotation of the rotating shell. The second bevel gears rotate by themselves and drive the inclined scraper to rotate, so as to scrape off the polyarylate crystals on the inclined surface of the inner wall of the distillation box, which is conducive to scraping off the polyarylate crystals on the inclined surface of the inner wall of the distillation box, and stirring the mixed solution at the same time; the vertical scraper is close to the vertical surface of the inner wall of the distillation box, and the rotation of the rotating shell drives the rotating rod to rotate, and the rotation of the rotating rod drives the vertical scraper to rotate, so as to scrape off the polyarylate crystals on the vertical surface of the inner wall of the distillation box, which is conducive to scraping off the polyarylate crystals on the vertical surface of the inner wall of the distillation box. The utility model can continue to distill and recover the separation agent ethanol after recovering the solvent dichloromethane, can scrape off the inner wall crystals while stirring, can filter and separate and recover the unreacted monomers and polyarylate crystals, and has high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0021] Figure 2 Schematic diagram of the three-dimensional structure of this utility model Figure 2 ;

[0022] Figure 3 It is a cross-sectional view of the utility model;

[0023] Figure 4 for Figure 3 A magnified view of middle;

[0024] Figure 5 This is a schematic diagram of the structure of the scraping and stirring device of the utility model;

[0025] Figure 6 This is a cross-sectional view of the condensation component of the utility model.

[0026] In the figure: 1. base; 2. heating box; 3. first valve; 4. distillation box; 5. second valve; 6. filter screen; 7. third valve; 8. scraper and stirring device; 9. first bevel gear; 10. rotating shell; 11. second bevel gear; 12. inclined scraper; 13. rotating rod; 14. vertical scraper; 15. auxiliary stirring rod; 16. first gear; 17. second gear; 18. three-way joint; 19. fourth valve; 20. inner tube; 21. outer tube; 22. fifth valve; 23. radiator; 24. water pump; 25. cooling fan. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the following description, the terms “left”, “right”, “front”, “back”, “up” and “down” are used to refer to Figure 1 The viewing direction is oriented.

[0029] See also Figures 1 to 6In an embodiment of the utility model, a distillation recovery device for the production of polyarylate includes a base 1, a heating box 2 is fixedly installed on the upper side of the base 1 through a bracket, a plurality of heating plates are fixedly installed in the heating box 2, a first valve 3 is fixedly installed on the right side of the heating box 2, a distillation box 4 is fixedly installed on the upper side of the heating box 2, a second valve 5 is fixedly installed on the lower left side of the distillation box 4, a filter screen 6 is fixedly installed on one end of the second valve 5 close to the distillation box 4, a third valve 7 is fixedly installed on the lower side of the distillation box 4, a scraping and stirring device 8 is installed in the distillation box 4, and a feed port is fixedly installed on the upper right side of the distillation box 4;

[0030] Add silicone oil into the heating box 2 through the first valve 3, heat the silicone oil at a constant temperature through the heating plate, so that the silicone oil is in a constant temperature state, and heat the distillation box 4 with the constant temperature silicone oil, and add the polyarylate mixed solution into the distillation box 4 through the feed port on the upper right side of the distillation box 4, and condense and collect the dichloromethane and ethanol after vaporization by distillation to purify the polyarylate, open the second valve 5, and collect the unreacted monomer after filtering through the filter screen 6, and collect the remaining polyarylate crystals through the third valve 7 on the lower side of the distillation box 4, which is conducive to vaporizing the substances with lower boiling points by distillation to purify the polyarylate;

[0031] The scraping and stirring device 8 comprises: a first bevel gear 9, a rotating shell 10, a second bevel gear 11, a bevel scraper 12, a scraping assembly and a driving assembly, wherein the first bevel gear 9 is fixedly mounted on the upper side of the interior of the distillation box 4, the rotating shell 10 is rotatably connected to the shaft of the first bevel gear 9, two second bevel gears 11 are symmetrically rotated along the rotating shell 10 and connected to the left and right sides of the rotating shell 10, and a bevel scraper 12 is fixedly mounted on one end of the rotating shaft of each second bevel gear 11 away from the second bevel gear 11, and the bevel scraper 12 is arc-shaped and fits the bevel of the inner wall of the distillation box 4, the scraping assembly is mounted on the rotating shell 10, and the driving assembly is mounted on the distillation box 4;

[0032] The rotating shell 10 rotates to drive the two second bevel gears 11 to rotate. The second bevel gears 11 rotate while following the rotating shell 10. The second bevel gears 11 rotate by themselves and drive the inclined scraper 12 to rotate to scrape off the polyarylate crystals on the inclined surface of the inner wall of the distillation box 4, which is beneficial to scrape off the polyarylate crystals on the inclined surface of the inner wall of the distillation box 4 and stir the mixed solution at the same time.

[0033] The scraping assembly includes: a rotating rod 13 and a vertical scraper 14, wherein the rotating rod 13 is fixedly connected to the front and rear side walls of the rotating shell 10, and one end of each rotating rod 13 away from the rotating shell 10 is fixedly connected to the vertical scraper 14;

[0034] The vertical scraper 14 is close to the vertical surface of the inner wall of the distillation box 4, and the rotating shell 10 rotates to drive the rotating rod 13 to rotate, and the rotating rod 13 rotates to drive the vertical scraper 14 to rotate, so as to scrape off the polyarylate crystals on the vertical surface of the inner wall of the distillation box 4, which is conducive to scraping off the polyarylate crystals on the vertical surface of the inner wall of the distillation box 4;

[0035] The driving assembly includes: an auxiliary stirring rod 15, a driving motor, a first gear 16 and a second gear 17, wherein the auxiliary stirring rod 15 is fixedly mounted on the lower side of the rotating shell 10, the driving motor is fixedly mounted on the upper side of the outside of the distillation box 4, the first gear 16 is fixedly mounted on the output shaft of the driving motor, and the second gear 17 is fixedly mounted on the upper side of the rotating shell 10, and the second gear 17 and the first gear 16 are meshed with each other;

[0036] The output shaft of the driving motor rotates to drive the first gear 16 to rotate, the first gear 16 rotates to drive the second gear 17 to rotate, the second gear 17 rotates to drive the rotating shell 10 to rotate, and the rotating shell 10 rotates to drive the auxiliary stirring rod 15 on the lower side of the rotating shell 10 to rotate, which is beneficial to auxiliary stirring to improve the heating uniformity and heating speed of the polyarylate mixed solution;

[0037] A split recovery device is installed on the upper side of the distillation box 4;

[0038] The split recovery device comprises: a three-way joint 18, a fourth valve 19, a connecting pipe and a condensing assembly, wherein the three-way joint 18 is fixedly installed on the upper left side of the distillation box 4, the other two interfaces of the three-way joint 18 are fixedly installed with the fourth valve 19, the end of the fourth valve 19 away from the three-way joint 18 is fixedly installed with a connecting pipe, and the condensing assembly is installed at the end of the connecting pipe away from the fourth valve 19;

[0039] The condensation assembly includes: an inner tube 20, an outer tube 21 and a fifth valve 22, the left end of the inner tube 20 is fixedly connected to the end of the connecting tube away from the fourth valve 19, the outer tube 21 is fixedly installed on the inner tube 20, the fifth valve 22 is fixedly connected to the right end of the inner tube 20, and the upper left side and the lower right side of the outer tube 21 are fixedly installed with connecting pipes;

[0040] The boiling point of dichloromethane is 39.8 degrees. The distillation box 4 is first heated to about 40 degrees to evaporate dichloromethane. The third valve 7 on the rear side of the three-way joint 18 is opened. The dichloromethane vapor enters the inner tube 20 of the rear condensation component through the third valve 7 to be condensed and recovered. The third valve 7 on the rear side of the three-way joint 18 is closed. The third valve 7 on the front side of the three-way joint 18 is opened. The boiling point of ethanol is 78.3 degrees. The distillation box 4 is heated to about 79 degrees to evaporate ethanol. The ethanol vapor enters the inner tube 20 of the front condensation component through the third valve 7 to be condensed and recovered. The multi-stage recovery is performed through the split recovery device, which is beneficial to continue to recover the separation agent ethanol after recovering the solvent dichloromethane, and the production efficiency is high;

[0041] A cooling device is installed on the upper side of the base 1;

[0042] The cooling device includes: a cold row 23, a water pump 24 and a cooling fan 25, wherein the cold row 23 is fixedly mounted on the upper side of the base 1, the output end of the water pump 24 is fixedly connected to the input end of the cold row 23, and a plurality of cooling fans 25 are fixedly mounted on the side wall of the cold row 23;

[0043] The upper left connecting pipes of the two outer pipes 21 are connected to each other through pipes, the lower right connecting pipe of the rear outer pipe 21 is fixedly connected to the output end of the radiator 23 through a pipe, and the lower right connecting pipe of the front outer pipe 21 is fixedly connected to the input end of the water pump 24 through a pipe;

[0044] The cooling water in the radiator 23 is pumped out from the output end of the radiator 23 by the water pump 24, enters the rear outer tube 21, passes through the front outer tube 21, and enters the radiator 23 again through the water pump 24, so that the inner tube 20 in the rear outer tube 21 and the inner tube 20 in the front outer tube 21 are quickly cooled down, and the cooling fan 25 cools down the cooling water in the radiator 23 to improve the condensation effect, which is beneficial to improving the condensation effect while reducing the size of the equipment.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A distillation recovery device for the production of polyarylate, comprising a base (1), characterized in that: A heating box (2) is fixedly mounted on the upper side of the base (1) via a bracket, a plurality of heating plates are fixedly mounted inside the heating box (2), a first valve (3) is fixedly mounted on the right side of the heating box (2), a distillation box (4) is fixedly mounted on the upper side of the heating box (2), a second valve (5) is fixedly mounted on the lower left side of the distillation box (4), a filter screen (6) is fixedly mounted on one end of the second valve (5) close to the distillation box (4), a third valve (7) is fixedly mounted directly below the distillation box (4), a scraping and stirring device (8) is installed inside the distillation box (4), and a feed port is fixedly mounted on the upper right side of the distillation box (4).

2. The distillation recovery device for polyarylate production according to claim 1, characterized in that: The scraping and stirring device (8) comprises: a first bevel gear (9), a rotating shell (10), a second bevel gear (11), a bevel scraper (12), a scraping assembly and a driving assembly, wherein the first bevel gear (9) is fixedly mounted on the upper side of the interior of the distillation box (4), the rotating shell (10) is rotatably connected to the shaft of the first bevel gear (9), two second bevel gears (11) are symmetrically rotated along the rotating shell (10) and are connected to the left and right sides of the rotating shell (10), and a bevel scraper (12) is fixedly mounted on one end of the rotating shaft of each second bevel gear (11) away from the second bevel gear (11), the scraping assembly is mounted on the rotating shell (10), and the driving assembly is mounted on the distillation box (4).

3. The distillation recovery device for polyarylate production according to claim 2, characterized in that: The scraping assembly comprises: a rotating rod (13) and a vertical scraper (14); the rotating rod (13) is fixedly connected to the front and rear side walls of the rotating shell (10); and one end of each rotating rod (13) away from the rotating shell (10) is fixedly connected to the vertical scraper (14).

4. The distillation recovery device for polyarylate production according to claim 3, characterized in that: The driving assembly comprises: an auxiliary stirring rod (15), a driving motor, a first gear (16) and a second gear (17); the auxiliary stirring rod (15) is fixedly mounted on the lower side of the rotating shell (10); the driving motor is fixedly mounted on the upper side of the outside of the distillation box (4); the first gear (16) is fixedly mounted on the output shaft of the driving motor; the second gear (17) is fixedly mounted on the upper side of the rotating shell (10); and the second gear (17) and the first gear (16) are meshed with each other.

5. The distillation recovery device for polyarylate production according to claim 4, characterized in that: A split recovery device is installed on the upper side of the distillation box (4).

6. The distillation recovery device for polyarylate production according to claim 5, characterized in that: The split recovery device comprises: a three-way joint (18), a fourth valve (19), a connecting pipe and a condensation component, wherein the three-way joint (18) is fixedly installed on the upper left side of the distillation box (4), the fourth valve (19) is fixedly installed at the other two interfaces of the three-way joint (18), the connecting pipe is fixedly installed at one end of the fourth valve (19) away from the three-way joint (18), and the condensation component is installed at one end of the connecting pipe away from the fourth valve (19).

7. The distillation recovery device for polyarylate production according to claim 6, characterized in that: The condensation assembly comprises: an inner tube (20), an outer tube (21) and a fifth valve (22); the left end of the inner tube (20) is fixedly connected to an end of the connecting tube away from the fourth valve (19); the outer tube (21) is fixedly mounted on the inner tube (20); the fifth valve (22) is fixedly connected to the right end of the inner tube (20); and connecting pipes are fixedly mounted on the upper left side and the lower right side of the outer tube (21).

8. The distillation recovery device for polyarylate production according to claim 7, characterized in that: A cooling device is installed on the upper side of the base (1).

9. The distillation recovery device for polyarylate production according to claim 8, characterized in that: The cooling device comprises: a cold row (23), a water pump (24) and a heat dissipation fan (25); the cold row (23) is fixedly mounted on the upper side of the base (1); the output end of the water pump (24) is fixedly connected to the input end of the cold row (23); and a plurality of the heat dissipation fans (25) are fixedly mounted on the side wall of the cold row (23).

10. The distillation recovery device for polyarylate production according to claim 9, characterized in that: The upper left connecting pipes of the two outer pipes (21) are connected to each other via pipes, the lower right connecting pipe of the rear outer pipe (21) is fixedly connected to the output end of the radiator (23) via a pipe, and the lower right connecting pipe of the front outer pipe (21) is fixedly connected to the input end of the water pump (24) via a pipe.

Images