A drying apparatus for AMPS polymer emulsions

Abstract

A drying apparatus for AMPS polymer emulsions, relating to the field of drum dryer technology, includes a base, a drum, an emulsion tank, and two side support cylinders on top of the base. The side support cylinders are fixedly connected to the base. Both ends of the drum extend into the two side support cylinders and are rotatably sealed to them. A portion of the lower outer wall of the drum and the side support cylinders is located within the emulsion tank. Several slidingly arranged sliding collection plates are provided through the outer wall of the drum. A collection groove is provided at the top of each sliding collection plate. An extrusion plate, slidably sealed to the sliding collection plate, is located inside the collection groove. The outer side wall of the sliding collection plate has an arc-shaped structure. When the sliding collection plate is reset, its outer side wall and the outer wall of the drum form a complete circular structure. A gas channel is provided inside the extrusion plate, and an air duct is provided inside the drum. Both the gas channel and the air duct are connected to an external hot air circulation system. This invention solves the problem of low drying efficiency caused by the curtain-like flow effect in existing drum dryers.

Description

Technical Field

[0001] This invention relates to the field of drum dryer technology, specifically to a drying device for AMPS polymer emulsions. Background Technology

[0002] AMPS polymer emulsion is an aqueous dispersion obtained through emulsion polymerization using 2-acrylamido-2-methylpropanesulfonic acid (AMPS) as the functional monomer. It exhibits excellent electrolyte resistance, high-temperature resistance, and good ionic conductivity, and is commonly used in oilfield drilling fluids, superabsorbent resins, textile coatings, and building waterproofing. To reduce transportation costs, decrease storage volume, improve product stability and prevent stratification or deterioration during long-term storage, or facilitate the metered addition of polymers in powder form to non-aqueous systems, and when downstream processes require solvent-free release or redissolution in specific media, AMPS polymer emulsions need to be dried into solids. Rotary drum dryers are typically used for drying AMPS polymer emulsions because the emulsion has high viscosity and film-forming properties. Rotary drum dryers achieve rapid heat transfer and moisture evaporation by heating the drum surface to contact a thin layer of emulsion, effectively preventing polymer thermal degradation. Simultaneously, controlling the drum speed and temperature yields uniform flake or powder products, meeting the requirements of subsequent pulverization, packaging, and reprocessing.

[0003] Existing rotary drum dryers have gradually revealed their shortcomings during use, mainly in the following aspects: The curtain flow effect leads to low drying efficiency. Specifically, in the process of processing emulsions in a drum dryer, the curtain flow effect is a key phenomenon affecting drying efficiency. Its root cause lies in the fact that the emulsion itself has a certain viscosity and there is an adhesion between it and the drum surface. During the rotation of the drum, after the emulsion is separated from it, most of the emulsion will adhere to the drum surface and form a liquid film. Under its own gravity, this liquid film flows back downward on the drum surface, forming downward-hanging ripples, stripes, or thin liquid bundles called "curtains". These dynamically formed curtain-shaped liquid flows will eventually fall back into the emulsion tank at the bottom, resulting in a significant reduction in the amount of emulsion that can be effectively retained on the drum surface and dried, thereby reducing the drying efficiency of the drum.

[0004] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a drying device for AMPS polymer emulsions. During operation, this device effectively collects and dries the emulsion flowing downwards after the drum detaches from the emulsion, thereby significantly increasing the amount of emulsion dried per unit time and improving drying efficiency. After the emulsion is dried, the device can automatically separate the solids formed by drying the collected refluxed emulsion and the solids formed by drying the emulsion on the outer wall of the drum, thereby significantly improving the practicality of the device.

[0006] To address the above problems, the present invention provides the following technical solution: A drying device for AMPS polymer emulsion includes a base, a roller, an emulsion tank, and two side support cylinders on the top of the base. The side support cylinders are fixedly connected to the base. Both ends of the roller extend into the two side support cylinders and are rotatably sealed to them. A portion of the lower outer wall of the roller and the side support cylinders is located inside the emulsion tank. A plurality of slidingly arranged sliding collection plates are provided through the outer wall of the roller. A collection groove is provided on the top of the sliding collection plate. An extrusion plate is provided inside the collection groove and is slidably sealed to the sliding collection plate. The side outer wall of the sliding collection plate has an arc-shaped structure. When the sliding collection plate is reset, its side outer wall and the outer wall of the roller form a complete circular structure. A gas channel is provided inside the extrusion plate, and an air duct is provided inside the roller. Both the gas channel and the air duct are connected to an external hot air circulation system.

[0007] As an optimized solution, a fixing plate is fixedly provided on the outer wall of the side support cylinder, and a scraper that rubs against the outer wall of the roller is provided between the two fixing plates. The two ends of the scraper are fixedly connected to the two fixing plates respectively.

[0008] As an optimized solution, the outer walls at both ends of the roller are provided with several vents that communicate with the air duct, the inner wall of the side support cylinder is provided with an annular groove that communicates with the vents, and the end of the side support cylinder is provided with several vent pipes that communicate with the annular groove and are connected to the external hot air circulation system.

[0009] As an optimized solution, the extrusion plate is provided with ventilation openings on both sides at its end, which are connected to the gas channel. The inner wall of the collection tank is provided with two ventilation slots. During the sliding process of the extrusion plate, the ventilation openings always cover the ventilation slots. The ventilation slots are connected to the air duct through ventilation hoses.

[0010] As an optimized solution, a drive plate is slidably provided at the bottom of the collection tank, and both the bottom of the extrusion plate and the top of the drive plate are provided with inclined structures. The inclined surfaces at the bottom of the extrusion plate and the inclined surfaces at the top of the drive plate are slidably connected to form a wedge structure.

[0011] As an optimized solution, a number of drive telescopic cylinders are fixedly provided at the bottom of the sliding collection plate, and one end of the drive plate passes through the sliding collection plate and is fixedly connected to the telescopic end of the drive telescopic cylinder.

[0012] As an optimized solution, a sleeve and a lower insertion post are fixedly provided at the bottom of the collection tank, and an upper insertion post is fixedly provided at the bottom of the extrusion plate. The upper insertion post is located inside the sleeve and is slidably connected to the sleeve, and the top of the lower insertion post extends into the extrusion plate and is slidably connected to the extrusion plate.

[0013] As an optimized solution, the inner wall of the roller is fixedly provided with several inner support plates, the sliding collection plate is slidably connected to the inner support plates, and the top of the inner support plates is fixedly provided with several control telescopic cylinders, the telescopic ends of the control telescopic cylinders are fixedly connected to the sliding collection plates.

[0014] As an optimized solution, a conductive slip ring is fixedly provided on the inner wall of one of the side support cylinders, and a wiring pipe is rotatably provided on the inner wall of the other side support cylinder. One end of the wiring pipe is connected to the rotating end of the conductive slip ring, and several wiring grooves are provided through the outer wall of the wiring pipe. The wiring pipe is fixedly connected to the roller through several connecting plates.

[0015] As an optimized solution, an internal gear ring is fixedly provided on the inner wall of the roller, and a drive motor is fixedly provided at the end of the side support cylinder. The output shaft of the drive motor extends through the side support cylinder into the interior and is fixedly fitted with a gear that meshes with the internal gear ring.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. Hot air from the external hot air circulation system enters the duct through a vent pipe on one side. After passing through the duct, the hot air exits through a vent pipe on the other side. As the hot air passes through the duct, it heats the outer wall of the drum. Simultaneously, some of the hot air in the duct enters the gas channel through a flexible vent on one side. After passing through the gas channel, it exits through a flexible vent on the other side. As the hot air passes through the gas channel, it heats the top of the extrusion plate. The drive motor drives the drum to rotate. During drum rotation, after the emulsion separates, the control telescopic cylinder drives the sliding collection plate to slide outwards, leaking out of the collection tank. The emulsion flowing downwards from the outer wall of the drum drips into the collection tank for collection and drying (e.g., ...). Figure 10 As shown, the drum dries the emulsion adhering to its outer wall. During operation, when the drum detaches from the emulsion, it can effectively collect and dry the emulsion flowing downwards, thereby significantly increasing the amount of emulsion dried per unit time and improving drying efficiency. 2. After the emulsion at the top of the extruder plate is dried, as the extruder plate rotates downwards with the roller, the drive plate slides horizontally, thereby driving the extruder plate to slide outwards until the top of the extruder plate is flush with the top of the sliding collection plate (e.g., Figure 4 (As shown), then the sliding collection plate slides inward, and the solids that have been dried at the top of the extrusion plate are peeled off by the outer wall of the drum (as shown). Figure 11As shown), the solids are discharged through the scraper below. During the rotation of the drum, the scraper peels off and discharges the solids dried on the outer wall of the drum. After the emulsion drying is completed, the device can automatically peel off the solids formed by the drying of the collected reflux emulsion and the solids formed by the drying of the emulsion on the outer wall of the drum, thereby significantly improving the practicality of the device. 3. The outer side wall of the sliding collecting plate has an arc-shaped structure. After the sliding collecting plate is reset, it forms a complete circular structure with the outer wall of the drum (e.g., Figure 12 As shown in the figure, during the continuous frictional contact between the scraper and the outer wall of the drum, the outer wall of the sliding collection plate that has been reset can naturally conform to the overall shape of the drum, thereby completely avoiding motion interference with the scraper. 4. The conductive slip ring and wiring pipe enable the drive telescopic cylinder and control telescopic cylinder inside the drum to be connected to an external power source, effectively avoiding the problem of internal cylinder wiring entanglement caused by the continuous rotation of the drum. 5. During the sliding process of the extrusion plate, the vent always covers the ventilation groove, so hot air can always enter the gas channel and heat the extrusion plate, ensuring that the extrusion plate is always kept at the normal drying temperature. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the drum of the present invention; Figure 3 This is a schematic diagram of the top structure of the sliding collection plate of the present invention; Figure 4 This is a schematic diagram of the internal structure of the sliding collection plate of the present invention; Figure 5 This is a schematic diagram of the air duct structure of the present invention; Figure 6 This is a schematic diagram of the connection between the air duct and the annular groove in this invention; Figure 7 This is a schematic diagram of the ventilation opening structure of the present invention; Figure 8 This is a schematic diagram of the structure of the extrusion plate and the drive plate of the present invention; Figure 9 This is a schematic diagram of the conductive slip ring and wiring tube of the present invention; Figure 10 This is a schematic diagram of the structure for collecting refluxed emulsion according to the present invention; Figure 11 This is a schematic diagram of the structure when the solid at the top of the extrusion plate is peeled off according to the present invention; Figure 12 This is a schematic diagram of the structure of the sliding collecting plate of the present invention when it is reset.

[0019] In the diagram: 1-Base; 2-Emulsion tank; 3-Sliding collection plate; 4-Side support cylinder; 5-Roller; 6-Control telescopic cylinder; 7-Inner support plate; 8-Extrusion plate; 9-Collection trough; 10-Drive plate; 11-Upper insertion post; 12-Sleeve; 13-Lower insertion post; 14-Ventilation groove; 15-Ventilation hose; 16-Gas passage; 17-Drive telescopic cylinder; 18-Ventilation port; 19-Ventilation port; 20-Ventilation pipe; 21-Annular groove; 22-Internal gear ring; 23-Air duct; 24-Gear; 25-Fixing plate; 26-Scraper; 27-Conductive slip ring; 28-Wiring conduit; 29-Wiring groove; 30-Connecting plate; 31-Drive motor. Detailed Implementation

[0020] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0021] like Figures 1 to 12 As shown, a drying device for AMPS polymer emulsion includes a base 1. The top of the base 1 is provided with a roller 5, an emulsion tank 2, and two side support cylinders 4. The side support cylinders 4 are fixedly connected to the base 1. The two ends of the roller 5 extend into the two side support cylinders 4 and are rotatably sealed to them. The lower outer wall portion of the roller 5 and the side support cylinders 4 is located inside the emulsion tank 2. Several slidingly arranged sliding collection plates 3 are provided through the outer wall of the roller 5. The top of the sliding collection plate 3 is provided with a collection groove 9. The collection groove 9 is provided with an extrusion plate 8 that is slidably sealed to the sliding collection plate 3. The side outer wall of the sliding collection plate 3 has an arc-shaped structure. When the sliding collection plate 3 is reset, its side outer wall and the outer wall of the roller 5 form a complete circular structure. The extrusion plate 8 is provided with a gas channel 16. The roller 5 is provided with an air duct 23. Both the gas channel 16 and the air duct 23 are connected to an external hot air circulation system.

[0022] A fixing plate 25 is fixedly provided on the outer wall of the side support cylinder 4. A scraper 26 that rubs against the outer wall of the roller 5 is provided between the two fixing plates 25. The two ends of the scraper 26 are fixedly connected to the two fixing plates 25 respectively.

[0023] The outer walls at both ends of the roller 5 are provided with several vents 19 that communicate with the air duct 23. The inner wall of the side support cylinder 4 is provided with an annular groove 21 that communicates with the vents 19. The end of the side support cylinder 4 is provided with several vent pipes 20 that communicate with the annular groove 21 and are connected to the external hot air circulation system.

[0024] The extrusion plate 8 has ventilation openings 18 on both sides at its ends, which are connected to the gas passage 16. The inner wall of the collection tank 9 has two ventilation slots 14. During the sliding process of the extrusion plate 8, the ventilation openings 18 always cover the ventilation slots 14. The ventilation slots 14 are connected to the air duct 23 through ventilation hoses 15.

[0025] A drive plate 10 is slidably provided at the bottom of the collection tank 9. Both the bottom of the extrusion plate 8 and the top of the drive plate 10 are provided with inclined structures. The inclined surfaces at the bottom of the extrusion plate 8 and the inclined surfaces at the top of the drive plate 10 are slidably connected to form a wedge structure.

[0026] Several drive telescopic cylinders 17 are fixedly provided at the bottom of the sliding collection plate 3. One end of the drive plate 10 passes through the sliding collection plate 3 and is fixedly connected to the telescopic end of the drive telescopic cylinder 17.

[0027] The bottom of the collecting tank 9 is fixedly provided with a sleeve 12 and a lower insertion post 13. The bottom of the extrusion plate 8 is fixedly provided with an upper insertion post 11. The upper insertion post 11 is located inside the sleeve 12 and is slidably connected to the sleeve 12. The top of the lower insertion post 13 extends into the extrusion plate 8 and is slidably connected to the extrusion plate 8.

[0028] Several inner support plates 7 are fixedly provided on the inner wall of the roller 5. The sliding collection plate 3 is slidably connected to the inner support plate 7. Several control telescopic cylinders 6 are fixedly provided on the top of the inner support plate 7. The telescopic end of the control telescopic cylinder 6 is fixedly connected to the sliding collection plate 3.

[0029] One of the side support cylinders 4 has a conductive slip ring 27 fixedly installed on its inner wall, and the other side support cylinder 4 has a wiring pipe 28 rotatably installed on its inner wall. One end of the wiring pipe 28 is connected to the rotating end of the conductive slip ring 27. Several wiring grooves 29 are provided through the outer wall of the wiring pipe 28. The wiring pipe 28 is fixedly connected to the roller 5 through several connecting plates 30.

[0030] An internal gear ring 22 is fixedly provided on the inner wall of the roller 5, and a drive motor 31 is fixedly provided at the end of the side support cylinder 4. The output shaft of the drive motor 31 extends through the side support cylinder 4 into the interior and is fixedly fitted with a gear 24 that meshes with the internal gear ring 22.

[0031] The working principle of this device is as follows: Hot air from the external hot air circulation system enters the air duct 23 through a vent pipe 20 on one side. After passing through the air duct 23, the hot air exits through the vent pipe 20 on the other side. The hot air heats the outer wall of the roller 5 as it passes through the air duct 23. Simultaneously, some of the hot air in the air duct 23 enters the gas channel 16 through a vent hose 15 on one side. After passing through the gas channel 16, the hot air exits through the vent hose 15 on the other side. The hot air heats the top of the extrusion plate 8 as it passes through the gas channel 16. The drive motor 31 drives the roller 5 to rotate. During the rotation of the roller 5, after the emulsion separates, the control telescopic cylinder 6 drives the sliding collection plate 3 to slide outwards, causing the collection tank 9 to leak out. The emulsion flowing downwards from the outer wall of the roller 5 drips into the collection tank 9 for collection and drying (e.g., ...). Figure 10 As shown, the drum 5 dries the emulsion adhering to its outer wall. During operation, when the drum 5 is detached from the emulsion, it can effectively collect and dry the emulsion flowing downwards, thereby significantly increasing the amount of emulsion dried per unit time and improving the drying efficiency. After the emulsion at the top of the extrusion plate 8 has dried, as the extrusion plate 8 rotates downwards with the roller 5, the drive plate 10 slides horizontally, thereby driving the extrusion plate 8 to slide outwards until the top of the extrusion plate 8 is flush with the top of the sliding collection plate 3 (e.g., Figure 4 (As shown), then the sliding collection plate 3 slides inward, and the solids that have been dried at the top of the extrusion plate 8 are peeled off by the outer wall of the roller 5 (as shown). Figure 11 As shown), and discharged through the scraper 26 below, during the rotation of the drum 5, the scraper 26 peels off and discharges the solids dried on the outer wall of the drum 5. After the emulsion drying is completed, the device can automatically peel off the solids formed by the drying of the collected reflux emulsion and the solids formed by the drying of the emulsion on the outer wall of the drum 5, thereby significantly improving the practicality of the device. The outer side wall of the sliding collecting plate 3 has an arc-shaped structure. After the sliding collecting plate 3 is reset, it forms a complete circular structure with the outer wall of the roller 5 (e.g., Figure 12 As shown in the figure, during the continuous frictional contact between the scraper 26 and the outer wall of the roller 5, the outer wall of the sliding collection plate 3, which has been reset, can naturally conform to the overall shape of the roller 5, thereby completely avoiding motion interference with the scraper 26. The conductive slip ring 27 and wiring pipe 28 enable the drive telescopic cylinder 17 and control telescopic cylinder 6 inside the drum 5 to be connected to an external power source, effectively avoiding the problem of internal cylinder wiring entanglement caused by the continuous rotation of the drum 5. During the sliding process of the extrusion plate 8, the vent 18 always covers the ventilation groove 14, so hot air can always enter the gas channel 16 and heat the extrusion plate 8, ensuring that the extrusion plate 8 is always kept at the normal drying temperature.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A drying apparatus for AMPS polymer emulsions, characterized by: The system includes a base (1), a roller (5), an emulsion tank (2) and two side support cylinders (4) on the top of the base (1). The side support cylinders (4) are fixedly connected to the base (1). The roller (5) extends into the two side support cylinders (4) at both ends and is rotatably sealed to them. The lower outer wall area of ​​the roller (5) and the side support cylinders (4) is located inside the emulsion tank (2). Several sliding collection plates (3) are provided through the outer wall of the roller (5). A collection groove (9) is provided on the top of the sliding collection plate (3). An extrusion plate (8) is provided inside the collection groove (9) and is slidably sealed to the sliding collection plate (3). The outer side wall of the sliding collection plate (3) is an arc-shaped structure. When the sliding collection plate (3) is reset, its outer side wall and the outer wall of the roller (5) form a complete circular structure. A gas channel (16) is provided inside the extrusion plate (8). An air duct (23) is provided inside the roller (5). Both the gas channel (16) and the air duct (23) are connected to an external hot air circulation system.

2. A drying apparatus for AMPS polymer emulsion as claimed in claim 1, wherein: The outer wall of the side support cylinder (4) is fixedly provided with a fixing plate (25), and a scraper (26) is provided between the two fixing plates (25) to rub against the outer wall of the roller (5). The two ends of the scraper (26) are fixedly connected to the two fixing plates (25).

3. A drying apparatus for AMPS polymer emulsion as claimed in claim 1, wherein: The outer walls at both ends of the roller (5) are provided with several vents (19) that communicate with the air duct (23). The inner wall of the side support cylinder (4) is provided with an annular groove (21) that communicates with the vents (19). The end of the side support cylinder (4) is provided with several vent pipes (20) that communicate with the annular groove (21) and the vent pipes (20) are connected to the external hot air circulation system.

4. A drying apparatus for AMPS polymer emulsion as claimed in claim 3, wherein: The extrusion plate (8) is provided with ventilation openings (18) on both sides at the ends, which are connected to the gas channel (16). The inner wall of the collection tank (9) is provided with two ventilation slots (14). During the sliding process of the extrusion plate (8), the ventilation openings (18) always cover the ventilation slots (14). The ventilation slots (14) are connected to the air duct (23) through ventilation hoses (15).

5. A drying apparatus for AMPS polymer emulsion as claimed in claim 1, wherein: The bottom of the collection trough (9) is provided with a drive plate (10). The bottom of the extrusion plate (8) and the top of the drive plate (10) are both provided with inclined structures. The inclined surfaces at the bottom of the extrusion plate (8) and the inclined surfaces at the top of the drive plate (10) are slidably connected to form a wedge structure.

6. A drying apparatus for AMPS polymer emulsion as claimed in claim 5, wherein: The bottom of the sliding collection plate (3) is fixedly provided with several drive telescopic cylinders (17), and one end of the drive plate (10) passes through the sliding collection plate (3) and is fixedly connected to the telescopic end of the drive telescopic cylinder (17).

7. A drying apparatus for AMPS polymer emulsion according to claim 5, characterized in that: The bottom of the collection trough (9) is fixedly provided with a sleeve (12) and a lower insertion post (13), and the bottom of the extrusion plate (8) is fixedly provided with an upper insertion post (11). The upper insertion post (11) is located inside the sleeve (12) and is slidably connected to the sleeve (12). The top of the lower insertion post (13) extends into the extrusion plate (8) and is slidably connected to the extrusion plate (8).

8. A drying apparatus for AMPS polymer emulsion according to claim 1, characterized in that: The inner wall of the roller (5) is fixedly provided with several inner support plates (7), the sliding collection plate (3) is slidably connected to the inner support plates (7), and the top of the inner support plate (7) is fixedly provided with several control telescopic cylinders (6), the telescopic end of the control telescopic cylinders (6) is fixedly connected to the sliding collection plate (3).

9. A drying apparatus for AMPS polymer emulsion according to claim 1, characterized in that: One of the side support cylinders (4) has a conductive slip ring (27) fixedly installed on its inner wall, and the other side support cylinder (4) has a wiring tube (28) rotatably installed on its inner wall. One end of the wiring tube (28) is connected to the rotating end of the conductive slip ring (27). Several wiring grooves (29) are provided through the outer wall of the wiring tube (28). The wiring tube (28) is fixedly connected to the roller (5) through several connecting plates (30).

10. A drying apparatus for AMPS polymer emulsion according to claim 1, characterized in that: The inner wall of the roller (5) is fixedly provided with an internal gear ring (22), and the end of the side support cylinder (4) is fixedly provided with a drive motor (31). The output shaft of the drive motor (31) extends through the side support cylinder (4) into the interior and is fixedly fitted with a gear (24) that meshes with the internal gear ring (22).

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