Distillation device for sodium carboxymethyl cellulose production

Abstract

The utility model discloses a distilling device for producing sodium carboxymethyl cellulose, which comprises a distilling barrel, a cover plate arranged on the distilling barrel, a concave top of the cover plate, a separating barrel arranged in the distilling barrel, a heating plate arranged in the separating barrel, a driving motor arranged at the bottom of the distilling barrel, a driving shaft arranged on a motor shaft of the driving motor, and a driving shaft arranged on the driving shaft. A connecting device and a stirring shaft are arranged on the driving shaft, a scraping plate is fixedly arranged on the stirring shaft, the connecting device comprises a first sliding block and a second sliding block, a clamping ring is arranged on the first sliding block, a clamping groove matched with the clamping ring is formed in the second sliding block, clamping rods are symmetrically arranged on the driving shaft, and clamping holes matched with the clamping rods are formed in the stirring shaft. The top of the cover plate is of an inwards-concave structure, liquefied water vapor slides to an interlayer between the separation barrel and the distillation barrel along the inner wall, water drops are prevented from flowing back to dilute the solution, a clamping ring and a clamping groove are rotationally matched, a sleeve is moved to drive a clamping rod to be locked, and connection or disassembly of the stirring shaft and the driving shaft is rapidly completed.

Description

Technical Field

[0001] This utility model relates to the field of chemical production technology, and more specifically, it relates to a distillation apparatus for the production of sodium carboxymethyl cellulose. Background Technology

[0002] Sodium carboxymethyl cellulose (CMC) is a water-soluble polymer widely used in food, pharmaceuticals, and daily chemicals. Distillation is a crucial step in its production process to purify raw materials and separate solvents. Traditional CMC distillation equipment has several limitations: early models often used open distillation pots, resulting in uneven heating and significant solvent evaporation, leading to raw material waste and potential environmental pollution and worker health risks due to harmful gas leaks; some equipment also suffers from low condensation efficiency, with solvent recovery rates below 60%, increasing production costs.

[0003] In traditional distillation apparatus, sodium carboxymethyl cellulose (CMC) solutions are prone to slow solvent evaporation due to uneven local heating, and the high viscosity of the solution makes it easy to deposit on the barrel wall, affecting heat transfer efficiency and prolonging distillation time. The stirring shaft and drive shaft are mostly fixedly connected, requiring the disassembly of multiple parts for cleaning, which is complicated and time-consuming. The CMC residue on the barrel wall is prone to bacterial growth, affecting product purity. Traditional exhaust pipe designs are simple, and low-boiling-point solvent vapors (such as isopropanol and ethanol) are prone to low recovery rates due to insufficient condensation, resulting in raw material waste and environmental pollution. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the problems existing in the prior art, this utility model provides a distillation apparatus for the production of sodium carboxymethyl cellulose, thereby solving the technical problem mentioned in the background art that the stirring shaft is inconvenient to install.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a distillation apparatus for the production of sodium carboxymethyl cellulose, comprising a distillation tank, a cover plate on the distillation tank, the top of the cover plate being concave, a partition tank inside the distillation tank, a heating plate inside the partition tank, a drive motor at the bottom of the distillation tank, a drive shaft on the motor shaft of the drive motor, a connecting device and a stirring shaft on the drive shaft, a scraper fixedly mounted on the stirring shaft, the connecting device comprising a first slider and a second slider, the first slider being mounted on the stirring shaft, the second slider being mounted on the drive shaft, the first slider being mounted on a snap-fit ​​ring, the second slider being mounted on a snap-fit ​​groove cooperating with the snap-fit ​​ring, snap-fit ​​rods symmetrically mounted on the drive shaft, and snap-fit ​​holes cooperating with the snap-fit ​​rods on the stirring shaft.

[0008] The present invention is further configured such that the drive shaft is provided with a movable groove, the movable groove is provided with a movable frame, and the locking rod is fixedly mounted on the movable frame, so as to facilitate the movement of the locking rod.

[0009] The present invention is further configured such that movable sliding grooves are provided on both sides of the movable groove, and movable sliders that cooperate with the movable sliding grooves are provided on both sides of the movable frame to restrict the movement direction of the movable frame.

[0010] The present invention is further configured such that a movable sleeve is provided on the outer side of the drive shaft, the movable sleeve is provided with a movable thread, and the movable slider is provided with a movable head that cooperates with the movable thread, so as to facilitate the movement of the movable frame.

[0011] The present invention is further provided with a drain pipe at the bottom of the side wall of the distillation barrel and an exhaust pipe on the side wall of the distillation barrel to facilitate the exhaust of gas and the removal of liquefied water droplets in the steam.

[0012] The present invention is further configured such that the exhaust pipe is V-shaped, and the bottom of the V-shape of the exhaust pipe is provided with a discharge pipe, and the discharge pipe is provided with a threaded sleeve to facilitate the recovery of partially liquefied solvent.

[0013] The present invention is further provided that the bottom of the distillation barrel is provided with a collection tube to facilitate the collection of sodium carboxymethyl cellulose.

[0014] The present invention is further configured such that a stirring plate is provided inside the scraper, which facilitates stirring of the sodium carboxymethyl cellulose solution and improves the solution heating efficiency.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, the present invention provides a distillation apparatus for the production of sodium carboxymethyl cellulose, which has the following advantages:

[0017] 1. The top of the cover plate adopts a concave structure. After the water vapor liquefies, it slides down the inner wall to the interlayer between the separator and the distillation tank, avoiding water droplets from flowing back to dilute the solution. The condensate in the interlayer can be discharged through the drain pipe to reduce interference with the raw materials. The V-shaped exhaust pipe extends the steam flow path, and the steam fully contacts the pipe wall at the bend, increasing the condensation area, facilitating recovery, and reducing raw material waste and exhaust emissions.

[0018] 2. The stirring shaft drives the scraper and the built-in stirring plate to rotate synchronously. The scraper scrapes against the inner wall of the separator to prevent CMC from depositing and scaling. The stirring plate penetrates deep into the solution to form a convection circulation, increasing the heating area, shortening the distillation time, and improving the uniformity of heating, thus avoiding CMC degradation caused by local overheating.

[0019] 3. By rotating the snap ring and snap groove and locking the snap rod with the moving sleeve, the connection or disassembly of the stirring shaft and the drive shaft can be completed quickly. The stirring shaft, scraper and stirring plate can be completely disassembled, which facilitates deep cleaning of CMC residues in the gaps and ensures the purity stability of batch production. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a distillation apparatus for producing sodium carboxymethyl cellulose according to the present invention;

[0021] Figure 2 This is a cross-sectional view of the distillation barrel and cover plate in this utility model;

[0022] Figure 3 This is a schematic diagram of the mating structure of the drive shaft and the stirring shaft in this utility model;

[0023] Figure 4 for Figure 3 A magnified schematic diagram of a portion of the structure of A in the diagram;

[0024] Figure 5 This is a cross-sectional view of the connecting device in this utility model.

[0025] In the diagram: 1. Distillation tank; 2. Cover plate; 3. Divider tank; 4. Heating plate; 5. Drive motor; 6. Drive shaft; 7. Stirring shaft; 8. Scraper; 9. First slider; 10. Second slider; 11. Snap-fit ​​ring; 12. Snap-fit ​​groove; 13. Snap-fit ​​rod; 14. Snap-fit ​​hole; 15. Moving groove; 16. Moving frame; 17. Moving slide; 18. Moving slider; 19. Moving sleeve; 20. Moving thread; 21. Moving head; 22. Drain pipe; 23. Exhaust pipe; 24. Discharge pipe; 25. Threaded sleeve; 26. Collection pipe; 27. Stirring plate. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0029] Please see Figures 1-5 A distillation apparatus for producing sodium carboxymethyl cellulose includes a distillation tank 1 with a cover plate 2 having a concave top. A separator 3 is located inside the distillation tank 1, and a heating plate 4 is located inside the separator 3. A drive motor 5 is located at the bottom of the distillation tank 1, and a drive shaft 6 is mounted on the motor shaft of the drive motor 5. A connecting device and a stirring shaft 7 are mounted on the drive shaft 6. A scraper 8 is fixedly mounted on the stirring shaft 7. The connecting device includes a first slider 9 and a second slider 10. The first slider 9 is mounted on the stirring shaft 7, and the second slider 10 is mounted on the drive shaft 6. The first slider 9 is provided with a snap-fit ​​ring 11, the second slider 10 is provided with a snap-fit ​​groove 12 that mates with the snap-fit ​​ring 11, the drive shaft 6 is provided with symmetrical snap-fit ​​rods 13, the stirring shaft 7 is provided with snap-fit ​​holes 14 that mate with the snap-fit ​​rods 13, the bottom of the side wall of the distillation tank 1 is provided with a drain pipe 22, the side wall of the distillation tank 1 is provided with an exhaust pipe 23, the exhaust pipe 23 is V-shaped, the bottom of the V-shape of the exhaust pipe 23 is provided with a discharge pipe 24, the discharge pipe 24 is provided with a threaded sleeve 25, the bottom of the distillation tank 1 is provided with a collection pipe 26, and the inside of the scraper 8 is provided with a stirring plate 27.

[0030] In this embodiment, during the production of sodium carboxymethyl cellulose, the solvent solute of sodium carboxymethyl cellulose, after preliminary filtration, is added to the separator 3 of the distillation tank 1. The cover plate 2 is then fastened to the distillation tank 1. The connection method and sealing measures between the cover plate 2 and the distillation tank 1 utilize existing technology. The sodium carboxymethyl cellulose solution is heated by the heating plate 4. The drive motor 5 is started, driving the drive shaft 6 and the stirring shaft 7 to rotate. The stirring shaft 7 drives the scraper 8 and the stirring plate 27 to rotate, facilitating mixing with the solution and improving the heating efficiency of the sodium carboxymethyl cellulose solution. The scraper 8 scrapes against the inner wall of the separator 3 to prevent impurities from adhering. The difference in boiling points is utilized to achieve solvent... After the solute is separated and the steam rises, some of the water vapor is pre-cooled and liquefied on the concave sidewall of the cover plate 2, and then slides down between the separator 3 and the distillation tank 1 to prevent water droplets from falling back into the sodium carboxymethyl cellulose solution. The remaining solvents, such as isopropanol and ethanol, are discharged through the exhaust pipe 23. After being cooled and liquefied in the exhaust pipe 23, they can be collected through the discharge pipe 24. The collection pipe 26, the exhaust pipe 23, and the drain pipe 22 are all equipped with valves for controlling the on and off in the prior art. After distillation is completed, the sodium carboxymethyl cellulose is recovered through the collection pipe 26. Other devices in the distillation tank 1, such as the temperature control system, the pressure regulation system, and the gas treatment device connected to the exhaust pipe 23, all adopt the prior art.

[0031] Please see Figures 3-5As one embodiment of the connecting device: the drive shaft 6 is provided with a movable groove 15, the movable groove 15 is provided with a movable frame 16, the snap-fit ​​rod 13 is fixedly mounted on the movable frame 16, the movable groove 15 is provided with movable slide grooves 17 on both sides, the movable frame 16 is provided with movable sliders 18 that cooperate with the movable slide grooves 17 on both sides, the drive shaft 6 is provided with a movable sleeve 19, the movable sleeve 19 is provided with a movable thread 20, and the movable slider 18 is provided with a movable head 21 that cooperates with the movable thread 20.

[0032] More specifically, when connecting the stirring shaft 7 and the drive shaft 6, the stirring shaft 7 and the drive shaft 6 are axially aligned so that the locking ring 11 on the first slider 9 is horizontally aligned with the locking groove 12 on the second slider 10. The stirring shaft 7 is then rotated so that the first slider 9 and the second slider 10 are fully aligned. Subsequently, the moving sleeve 19 is rotated. At this time, the drive shaft 6 will not rotate due to the self-locking effect of the drive motor 5. Therefore, the moving sleeve 19 can rotate relative to the drive shaft 6. The moving sleeve 19, through the cooperation of the moving head 21 and the moving thread 20, drives... The movable slider 18 moves along the movable slide groove 17, and the movable slider 18 drives the movable frame 16 and the locking rod 13 to move upward, so that the locking rod 13 extends into the locking hole 14, completing the connection and fixation of the stirring shaft 7 and the drive shaft 6. When it is necessary to disassemble the stirring shaft 7 for cleaning, the movable sleeve 19 is rotated in the opposite direction, which drives the movable frame 16 and the locking rod 13 to move downward. After the locking rod 13 disengages from the locking hole 14, the stirring shaft 7 can be disassembled by rotating it, which facilitates the cleaning of the stirring shaft 7, the scraper 8 and the stirring plate 27.

[0033] In summary, during the use or operation of the overall equipment: When producing sodium carboxymethyl cellulose, the solvent solute of sodium carboxymethyl cellulose, after preliminary filtration, is added to the separator 3 of distillation tank 1. The cover plate 2 is then fastened to distillation tank 1. The connection method and sealing measures between the cover plate 2 and distillation tank 1 utilize existing technology. The sodium carboxymethyl cellulose solution is heated by heating plate 4. The drive motor 5 is started, driving the drive shaft 6 and stirring shaft 7 to rotate. The stirring shaft 7 drives the scraper 8 and stirring plate 27 to rotate, facilitating mixing with the solution and improving the heating efficiency of the sodium carboxymethyl cellulose solution. The scraper 8 scrapes against the inner wall of the separator 3 to prevent impurities from adhering. The different boiling points are utilized... To achieve the separation of solvent and solute, after the steam rises, some of the water vapor is pre-cooled and liquefied on the concave sidewall of the cover plate 2, and then slides down between the separator 3 and the distillation tank 1, preventing water droplets from falling back into the sodium carboxymethyl cellulose solution. The remaining solvents, such as isopropanol and ethanol, are discharged through the exhaust pipe 23. After being cooled and liquefied in the exhaust pipe 23, they can be collected through the discharge pipe 24. The collection pipe 26, the exhaust pipe 23, and the drain pipe 22 are all equipped with valves for controlling the on and off in the prior art. After distillation is completed, the sodium carboxymethyl cellulose is recovered through the collection pipe 26. Other devices in the distillation tank 1, such as the temperature control system, the pressure regulation system, and the gas treatment device connected to the exhaust pipe 23, all adopt the prior art.

[0034] When connecting the stirring shaft 7 and the drive shaft 6, axially align the stirring shaft 7 and the drive shaft 6 so that the locking ring 11 on the first slider 9 is horizontally aligned with the locking groove 12 on the second slider 10. Then rotate the stirring shaft 7 to fully align the first slider 9 and the second slider 10. Subsequently, rotate the moving sleeve 19. At this time, the drive shaft 6 will not rotate due to the self-locking effect of the drive motor 5. Therefore, the moving sleeve 19 can rotate relative to the drive shaft 6. The moving sleeve 19 drives the moving head 21 and the moving thread 20 to move the moving head 21. The slider 18 moves along the movable slide groove 17, and the movable slider 18 drives the movable frame 16 and the locking rod 13 to move upward, so that the locking rod 13 extends into the locking hole 14, completing the connection and fixation of the stirring shaft 7 and the drive shaft 6. When it is necessary to disassemble the stirring shaft 7 for cleaning, the movable sleeve 19 is rotated in the opposite direction, which drives the movable frame 16 and the locking rod 13 to move downward. After the locking rod 13 disengages from the locking hole 14, the stirring shaft 7 can be disassembled by rotating it, which facilitates the cleaning of the stirring shaft 7, the scraper 8 and the stirring plate 27.

[0035] All other parts of this utility model that are not described in detail belong to the prior art, and therefore will not be described in detail here.

[0036] In all the solutions mentioned above, the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although the embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

[0037] In all the solutions mentioned above, those involving the operation of electrical components, unless otherwise specified, are controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and circuit connections are existing, well-known, and mature technologies, and their electrical connection relationships and specific circuit structures will not be elaborated here.

[0038] Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing known technologies, and this utility model will not elaborate on them.

Claims

1. A distillation apparatus for the production of sodium carboxymethyl cellulose, comprising a distillation tank (1), characterized in that: The distillation tank (1) is provided with a cover plate (2), the top of the cover plate (2) is concave, the distillation tank (1) is provided with a separator (3), the separator (3) is provided with a heating plate (4), the bottom of the distillation tank (1) is provided with a drive motor (5), the motor shaft of the drive motor (5) is provided with a drive shaft (6), the drive shaft (6) is provided with a connecting device and a stirring shaft (7), the stirring shaft (7) is fixedly provided with a scraper (8), the connecting device includes a first The first slider (9) is mounted on the stirring shaft (7), and the second slider (10) is mounted on the drive shaft (6). The first slider (9) is provided with a snap ring (11), and the second slider (10) is provided with a snap groove (12) that cooperates with the snap ring (11). The drive shaft (6) is symmetrically provided with snap rods (13), and the stirring shaft (7) is provided with snap holes (14) that cooperate with the snap rods (13).

2. The distillation apparatus for producing sodium carboxymethyl cellulose according to claim 1, characterized in that: The drive shaft (6) is provided with a moving groove (15), and a moving frame (16) is provided in the moving groove (15). The snap rod (13) is fixedly installed on the moving frame (16).

3. The distillation apparatus for producing sodium carboxymethyl cellulose according to claim 2, characterized in that: The movable groove (15) is provided with movable sliding grooves (17) on both sides, and the movable frame (16) is provided with movable sliders (18) that cooperate with the movable sliding grooves (17) on both sides.

4. The distillation apparatus for producing sodium carboxymethyl cellulose according to claim 3, characterized in that: The drive shaft (6) has a movable sleeve (19) on its outer side, the movable sleeve (19) has a movable thread (20) on its movable sleeve, and the movable slider (18) has a movable head (21) that cooperates with the movable thread (20).

5. A distillation apparatus for producing sodium carboxymethyl cellulose according to claim 1, characterized in that: The distillation barrel (1) has a drain pipe (22) at the bottom of its side wall and an exhaust pipe (23) on its side wall.

6. A distillation apparatus for producing sodium carboxymethyl cellulose according to claim 5, characterized in that: The exhaust pipe (23) is V-shaped, and the bottom of the V-shaped exhaust pipe (23) is provided with a discharge pipe (24), and the discharge pipe (24) is provided with a threaded sleeve (25).

7. A distillation apparatus for producing sodium carboxymethyl cellulose according to claim 6, characterized in that: The bottom of the distillation tank (1) is provided with a collection tube (26).

8. A distillation apparatus for producing sodium carboxymethyl cellulose according to claim 1, characterized in that: The scraper (8) has a stirring plate (27) inside.

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