Process for the preparation of aspartame fine recrystallization in ib crystal form

Abstract

The application relates to the field of aspartame refining technology, in particular to an IB crystal form aspartame refining and recrystallization preparation process, which further comprises a centrifugal machine body, the outer wall of the centrifugal machine body is fixedly connected with a centrifugal machine stabilizing base, the outer wall of the centrifugal machine stabilizing base is provided with a first transmission motor, and the output end of the first transmission motor is connected with a transmission shaft through a transmission assembly. The IB crystal form aspartame refining and recrystallization preparation process, the protruding second guide rod of the outer wall of the third centrifugal frame will be in contact with the first guide rod every circle rotation, the contact inclined surfaces of the end of the first guide rod and the end of the second guide rod are the same, so that the second guide rod is displaced under the action of the restoring spring, the arc-shaped plate moves to the right, and the plurality of inclined scrapers on the outer wall of the arc-shaped plate scrape the crystals on the inner wall of the third centrifugal frame to the right in the moving process of the arc-shaped plate, so that the crystals are conveniently conveyed away by the first spiral dragon.

Description

Technical Field

[0001] This invention relates to the field of aspartame refining technology, specifically to a process for preparing IB crystal form aspartame by recrystallization. Background Technology

[0002] IB crystalline aspartame is a sugar substitute sweetener that is widely used in many fields as a food processing agent. The processing of aspartame requires a crystallization process. After crystallization, aspartame needs to be dissolved in a solution to remove impurities before it can proceed to the next processing step. The crystals after dissolution need to be separated into solid and liquid phases using a centrifuge.

[0003] Currently available centrifuges for solid-liquid separation of aspartame crystals still retain a certain amount of moisture after centrifugation, affecting the efficiency of subsequent drying and failing to meet actual processing needs.

[0004] In view of this, the present invention proposes a process for the preparation of IB crystal form aspartame by refining and recrystallizing, in order to solve the technical problems existing in the prior art. Summary of the Invention

[0005] This invention provides a process for the refining and recrystallization of IB crystal aspartame, which has the beneficial effect of removing the liquid water on its surface to the greatest extent. This solves the problem mentioned in the background art that existing centrifuges for solid-liquid separation of aspartame crystals still have a certain amount of moisture after centrifugation, which affects the efficiency of subsequent drying and does not meet the actual processing needs.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a process for preparing IB crystal form aspartame by recrystallization, comprising the following processes:

[0007] S1. Raw material mixing: First, add the raw materials and pure water required for aspartame production to the heating and stirring tank. Dilute the aspartame raw materials with pure water at a concentration of 3%. Then, start the heating and stirring tank to stir and mix the raw materials. During the mixing process, the tank is heated to raise the temperature of the mixed solution so that the temperature of the mixed solution is less than or equal to 65 degrees Celsius.

[0008] S2, Static Crystallization: After the mixed solution in step S1 is mixed evenly, it is transferred to a solution mixing dish, and chilled water is simultaneously introduced into the solution mixing dish to cool it down. The temperature is dynamically measured in real time with a temperature measuring instrument until the temperature of the mixed solution in the solution mixing dish drops to the range of 30 to 40 degrees Celsius. Then, the mixed solution in the solution mixing dish is kept static.

[0009] S3. Solution rinsing: The cooled mixed solution from step S2 is introduced into the crystal culture vessel for static crystallization. After crystallization, a solution that can dissolve impurities in the crystals is introduced into the crystal culture vessel for rinsing, and the crystal culture vessel is started to stir the interior for wet granulation.

[0010] S4. Centrifugal separation: The mixture of crystals and solution from step S3 is introduced into the centrifuge body through the feed pipe for centrifugal separation to separate the crystals from the solution. Finally, the sealed door is opened to collect the crystals, thus completing the preparation of aspartame crystals.

[0011] An apparatus for the preparation of IB crystal form aspartame refining and recrystallization, applied to the above-mentioned preparation process, includes a centrifuge body:

[0012] A centrifuge stabilizing base is fixedly connected to the outer wall of the centrifuge body. A first drive motor is installed on the outer wall of the centrifuge stabilizing base. The output end of the first drive motor is connected to a drive shaft through a transmission assembly. The transmission assembly includes a first drive gear. One end of the first drive gear is fixedly connected to the output end of the first drive motor. A first fixing frame is rotatably provided at the other end of the first drive gear. A transmission gear chain is meshed with the outer wall of the first drive gear. A second drive gear is meshed with the inner wall of the transmission gear chain. One end of the second drive gear is fixedly connected to one end of the drive shaft.

[0013] As an alternative embodiment of the IB crystal form aspartame refining and recrystallization preparation device of the present invention, wherein: a first centrifugal mechanism is fixedly connected to the outer wall of the drive shaft, the first centrifugal mechanism includes a third fixed frame, the outer wall of the third fixed frame is fixedly connected to the first centrifugal frame, and the outer wall of the first centrifugal frame is provided with a second through groove, and multiple second through grooves are provided.

[0014] As an optional embodiment of the IB crystal form aspartame refining and recrystallization preparation device of the present invention, wherein: a second fixing frame is fixedly connected to the inner wall of the centrifuge body, the second fixing frame is sleeved on the outer wall of the first centrifuge frame, the first centrifuge frame is configured as a mesh structure, a second spiral auger is fixedly connected to the outer wall of the first centrifuge frame, and the outer contour of the second spiral auger matches the inner contour of the second fixing frame.

[0015] As an optional embodiment of the IB crystal form aspartame refining and recrystallization preparation apparatus of the present invention, wherein: a second drive motor is installed on the outer wall of the centrifuge body, a transmission mechanism is assembled at the output end of the second drive motor, the transmission mechanism includes a bevel gear group, one end of the bevel gear group is fixedly connected to the output end of the second drive motor, and a horizontal shaft is fixedly connected to the inner wall of the bevel gear group.

[0016] As an optional embodiment of the IB crystal form aspartame refining and recrystallization preparation apparatus of the present invention, wherein: one end of the horizontal shaft is rotatably connected to the inner wall of the centrifuge body, the other end of the horizontal shaft is fixedly connected to a third transmission gear, the outer wall of the third transmission gear is meshed with a transmission gear ring, the inner wall of the transmission gear ring is fixedly connected to a third centrifuge frame, and one end of the third centrifuge frame is rotatably connected to the inner wall of the centrifuge body through a ball bearing.

[0017] As an optional embodiment of the IB crystal form aspartame refining and recrystallization preparation apparatus of the present invention, wherein: a first guide rod is fixedly connected to the outer wall of the first centrifuge frame, a scraping mechanism is assembled on the inner wall of the third centrifuge frame, the scraping mechanism includes a second guide rod, both the ends of the second guide rod and the first guide rod are provided with abutting inclined surfaces, a return spring is sleeved on the outer wall of the second guide rod, and one end of the return spring is fixedly connected to the inner wall of the third centrifuge frame.

[0018] As an optional embodiment of the IB crystal form aspartame refining and recrystallization preparation device of the present invention, wherein: the other end of the reset spring is fixedly connected to an arc-shaped plate, the outer wall of the arc-shaped plate is fixedly connected to the other end of the second guide rod, the arc-shaped plate is configured as a semi-circular arc plate, and the outer wall of the arc-shaped plate is fixedly connected to a plurality of scrapers for cleaning the inner wall of the third centrifuge frame.

[0019] As an optional embodiment of the IB crystal form aspartame refining and recrystallization preparation device of the present invention, wherein: the inner wall of the third centrifuge frame is provided with a second centrifuge frame, one end of the second centrifuge frame is fixedly connected to the outer wall of the first centrifuge frame, the outer wall of the second centrifuge frame is fixedly connected with a first spiral auger, the outer contour of the first spiral auger matches the inner contour of the third centrifuge frame, and the outer wall of the second centrifuge frame is provided with a plurality of water leakage holes.

[0020] As an alternative embodiment of the IB crystal form aspartame refining and recrystallization preparation apparatus of the present invention, wherein: a feed pipe is connected to the outer wall of the centrifuge body, a conveying pipe is fixedly connected to the outer wall of the feed pipe, the conveying pipe is used to convey into the first centrifuge frame, a sealing door is installed on the outer wall of the centrifuge body, and a water outlet pipe is connected to the outer wall of the centrifuge body.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] In this invention, the IB crystal form aspartame refining and recrystallization preparation process involves the crystals being transported by the second spiral auger and falling from the end of the second fixed frame into the third centrifuge frame. At this time, the second drive motor is started, which drives the bevel gear group at the output end to rotate. The rotation of the bevel gear group drives the horizontal shaft on its inner wall to rotate, and the rotation of the horizontal shaft drives the third drive gear at its end to rotate. The rotation of the third drive gear drives the drive gear ring to rotate through the meshing relationship, and the drive gear ring drives the third centrifuge frame to rotate. The centrifugal force generated when the third centrifuge frame rotates can dehydrate the crystals in the third centrifuge frame again. Since the third centrifuge frame is set as a mesh structure, the liquid is thrown out of the mesh gap by centrifugal force.

[0023] In this invention, the process for refining and recrystallizing IB crystal form aspartame involves the following steps: When the third centrifuge frame rotates, the second guide rod protruding from the outer wall of the third centrifuge frame will contact the first guide rod once every circumference. Since the contact slopes at the ends of the first and second guide rods are the same, the second guide rod will be stretched by the return spring and displaced, moving the arc plate to the right. During the movement of the arc plate, multiple inclined scrapers on its outer wall scrape the crystals on the inner wall of the third centrifuge frame to the right, gradually scraping them from left to right to the inclined corner of the third centrifuge frame, where they are then transported away by the first spiral auger. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall process structure of the present invention;

[0025] Figure 2 This is a flowchart of the overall process structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the main structure of the centrifuge of the present invention;

[0027] Figure 4 This is a cross-sectional view of the main structure of the centrifuge of the present invention;

[0028] Figure 5 For the present invention Figure 4 Enlarged view of the structure at point A in the middle;

[0029] Figure 6 For the present invention Figure 4 Enlarged view of the structure at point B in the middle;

[0030] Figure 7 This is a partial structural diagram of the centrifuge body of the present invention.

[0031] In the diagram: 1. Centrifuge stabilizing base; 101. Centrifuge body; 102. Second fixing frame; 103. Sealing door; 104. Water outlet pipe; 2. First drive motor; 3. First drive gear; 4. First fixing frame; 5. Drive chain; 6. Second drive gear; 7. Drive shaft; 8. Third fixing frame; 9. First centrifuge frame; 10. Feed pipe; 11. Second centrifuge frame; 1101. Drain hole; 12. Conveying pipe; 13. First spiral auger; 14. First through slot; 15. Second spiral auger; 16. Second through slot; 17. Second drive motor; 18. Bevel gear set; 19. Horizontal shaft; 20. Third drive gear; 21. Drive gear ring; 22. Third centrifuge frame; 2201. Ball bearing; 23. First guide rod; 24. Return spring; 25. Second guide rod; 26. Abutting inclined plane; 27. Arc plate; 28. Scraper; 29. ​​Heating and stirring vessel; 30. Solution mixing dish; 31. Crystal culture vessel. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1

[0034] This embodiment is intended to facilitate the resolution of the problem; please refer to [link / reference]. Figures 1-7 A process for refining and recrystallizing IB crystal form aspartame includes the following steps:

[0035] S1. Raw material mixing: First, add the raw materials and pure water required for aspartame production to the heating and stirring vessel 29. Dilute the aspartame raw materials with pure water at a concentration of 3%. Then, start the heating and stirring vessel 29 to stir and mix the raw materials. During the mixing process, the vessel is heated to raise the temperature of the mixed solution so that the temperature of the mixed solution is less than or equal to 65 degrees Celsius.

[0036] S2, Static Crystallization: After the mixed solution in step S1 is mixed evenly, it is transferred to the solution mixing dish 30, and at the same time, chilled water is circulated into the solution mixing dish 30 to cool it down. The temperature is dynamically measured in real time with a temperature measuring instrument until the temperature of the mixed solution in the solution mixing dish 30 drops to the range of 30 to 40 degrees Celsius. Then, the mixed solution in the solution mixing dish 30 is kept static.

[0037] S3, Solution rinsing: The cooled mixed solution from step S3 is introduced into the crystal culture vessel 31 for static crystallization. After crystallization, a solution that can dissolve impurities in the crystals is introduced into the crystal culture vessel 31 for cleaning, and the crystal culture vessel 31 is started to stir the interior for wet granulation.

[0038] S4. Centrifugal separation: The mixture of crystals and solution from step S3 is introduced into the centrifuge body 101 through the feed pipe 10 for centrifugal separation to separate the crystals from the solution. Finally, the crystals are collected by opening the sealing door 103 to complete the preparation of aspartame crystals.

[0039] Example 2:

[0040] An apparatus for the preparation of IB crystal form aspartame refining and recrystallization, applied to the preparation process in Example 1 above, includes a centrifuge body 101:

[0041] A centrifuge body 101 is fixedly connected to a centrifuge stabilizing base 1 on its outer wall. A first drive motor 2 is installed on the outer wall of the centrifuge stabilizing base 1. The output end of the first drive motor 2 is connected to a drive shaft 7 through a transmission assembly. The transmission assembly includes a first drive gear 3. One end of the first drive gear 3 is fixedly connected to the output end of the first drive motor 2. A first fixing frame 4 is rotatably provided on the other end of the first drive gear 3. A transmission gear chain 5 is meshed with the outer wall of the first drive gear 3. A second drive gear 6 is meshed with the inner wall of the transmission gear chain 5. One end of the second drive gear 6 is fixedly connected to one end of the drive shaft 7.

[0042] A first centrifugal mechanism is fixedly connected to the outer wall of the drive shaft 7. The first centrifugal mechanism includes a third fixed frame 8. A first centrifugal frame 9 is fixedly connected to the outer wall of the third fixed frame 8. A second through groove 16 is provided on the outer wall of the first centrifugal frame 9. Multiple second through grooves 16 are provided.

[0043] A second fixing frame 102 is fixedly connected to the inner wall of the centrifuge body 101. The second fixing frame 102 is sleeved on the outer wall of the first centrifuge frame 9. The second fixing frame 102 is set as a mesh structure. A second spiral auger 15 is fixedly connected to the outer wall of the first centrifuge frame 9. The outer contour of the second spiral auger 15 matches the inner contour of the second fixing frame 102.

[0044] The inner wall of the third centrifuge frame 22 is provided with a second centrifuge frame 11. One end of the second centrifuge frame 11 is fixedly connected to the outer wall of the first centrifuge frame 9. The outer wall of the second centrifuge frame 11 is fixedly connected with a first spiral auger 13. The outer contour of the first spiral auger 13 matches the inner contour of the third centrifuge frame 22. The outer wall of the second centrifuge frame 11 is provided with multiple water leakage holes 1101.

[0045] The outer wall of the centrifuge body 101 is connected to a feed pipe 10, and the outer wall of the feed pipe 10 is fixedly connected to a conveying pipe 12. The conveying pipe 12 is used to convey into the first centrifuge frame 9. A sealing door 103 is installed on the outer wall of the centrifuge body 101, and a water outlet pipe 104 is connected to the outer wall of the centrifuge body 101.

[0046] In this embodiment: when the mixed solution enters the centrifuge body 101, the first drive motor 2 is started. After the first drive motor 2 starts, it drives the first drive gear 3 at its output end to rotate. After the first drive gear 3 rotates, it drives the drive chain 5 meshing with its outer wall to rotate together. When the drive chain 5 rotates, it drives the second drive gear 6 to rotate through the meshing relationship. At the same time, the second drive gear 6 rotates, and it drives the drive shaft 7 at its end to rotate together. After the drive shaft 7 rotates, it drives the third fixed frame 8 to rotate together. After the third fixed frame 8 rotates, it drives the first centrifuge frame 9 to rotate together, so that the mixed solution entering the first centrifuge frame 9 is gradually thrown through the second channel 16 by centrifugal force. The crystals exit the first centrifuge frame 9 and enter the space formed between the first centrifuge frame 9 and the second fixed frame 102. Since the second fixed frame 102 is set as a mesh structure, it can filter the crystals in the mixed solution and let the liquid leak out. The leaked liquid is discharged to the outside through the water outlet pipe 104. The crystals are transported to the right by the second spiral auger 15 rotating on the outer wall of the first centrifuge frame 9 along the space formed between the second fixed frame 102 and the first centrifuge frame 9. When the first centrifuge frame 9 rotates, it also rotates the second centrifuge frame 11. The first spiral auger 13 on the outer wall of the second centrifuge frame 11 also rotates. Therefore, the crystals are transported to the vicinity of the sealing door 103 for easy collection.

[0047] Example 3

[0048] This embodiment aims to address the problem that after the liquid is separated by centrifugation in Example 1, some moisture remains in the crystals, affecting the subsequent drying efficiency. This embodiment is an improvement upon Example 1. For details, please refer to [link to example]. Figures 1-7 A second drive motor 17 is installed on the outer wall of the centrifuge body 101. A transmission mechanism is assembled at the output end of the second drive motor 17. The transmission mechanism includes a bevel gear group 18. One end of the bevel gear group 18 is fixedly connected to the output end of the second drive motor 17. A horizontal shaft 19 is fixedly connected to the inner wall of the bevel gear group 18.

[0049] One end of the horizontal shaft 19 is rotatably connected to the inner wall of the centrifuge body 101, and the other end of the horizontal shaft 19 is fixedly connected to a third transmission gear 20. The outer wall of the third transmission gear 20 is meshed with a transmission gear ring 21, and the inner wall of the transmission gear ring 21 is fixedly connected to a third centrifuge frame 22. The third centrifuge frame 22 is configured as a mesh structure, and one end of the third centrifuge frame 22 is rotatably connected to the inner wall of the centrifuge body 101 through a ball bearing 2201.

[0050] In this embodiment: after the liquid is separated by centrifuge in Example 1, there will still be a certain amount of moisture in the crystals, which will affect the subsequent drying efficiency;

[0051] Therefore, during the process of the crystal being transported by the second spiral auger 15, it will fall from the end of the second fixed frame 102 into the third centrifugal frame 22. At this time, the second drive motor 17 is started. After the second drive motor 17 is started, it drives the bevel gear group 18 at the output end to rotate. After the bevel gear group 18 rotates, it drives the horizontal shaft 19 on its inner wall to rotate. After the horizontal shaft 19 rotates, it drives the third drive gear 20 at its end to rotate. The rotation of the third drive gear 20 drives the drive gear ring 21 to rotate through the meshing relationship. The drive gear ring 21 then drives the third centrifugal frame 22 to rotate. The centrifugal force generated when the third centrifugal frame 22 rotates can dehydrate the crystal in the third centrifugal frame 22 again. Since the third centrifugal frame 22 is set as a mesh structure, the liquid is thrown out of the mesh gap by centrifugal force.

[0052] Example 4

[0053] This embodiment aims to address the problem in Embodiment 2 where crystals tend to accumulate inside the third centrifuge frame 22 and cannot be transported away, thus failing to meet collection requirements. This embodiment is an improvement upon Embodiment 1. For details, please refer to [link to Embodiment 2]. Figures 1-7 The outer wall of the first centrifuge frame 9 is fixedly connected to the first guide rod 23, and the inner wall of the third centrifuge frame 22 is equipped with a scraping mechanism. The scraping mechanism includes a second guide rod 25. The ends of the second guide rod 25 and the first guide rod 23 are provided with abutting slopes 26. The outer wall of the second guide rod 25 is fitted with a return spring 24, and one end of the return spring 24 is fixedly connected to the inner wall of the third centrifuge frame 22.

[0054] The other end of the reset spring 24 is fixedly connected to an arc plate 27. The outer wall of the arc plate 27 is fixedly connected to the other end of the second guide rod 25. The arc plate 27 is set as a semi-circular arc plate. Multiple scrapers 28 for cleaning the inner wall of the third centrifugal frame 22 are fixedly connected to the outer wall of the arc plate 27.

[0055] In this embodiment: In Example 2, the crystals tend to accumulate inside the third centrifuge frame 22 and cannot be transported away, which does not meet the collection requirements;

[0056] Therefore, when the third centrifugal frame 22 rotates, the second guide rod 25 protruding from the outer wall of the third centrifugal frame 22 will come into contact with the first guide rod 23 after rotating one revolution. Since the contact slope 26 of the end of the first guide rod 23 and the end of the second guide rod 25 are the same, the second guide rod 25 will be stretched by the return spring 24 and displaced, moving the arc plate 27 to the right. During the movement of the arc plate 27, multiple inclined scrapers 28 on its outer wall scrape the crystals on the inner wall of the third centrifugal frame 22 to the right, gradually scraping them from left to right to the inclined corner of the third centrifugal frame 22, and then being transported away by the first spiral auger 13.

[0057] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0058] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An apparatus for the preparation of IB crystal form aspartame refining and recrystallization, characterized in that: The system includes a centrifuge body (101), a centrifuge stabilizing base (1) fixedly connected to the outer wall of the centrifuge body (101), a first drive motor (2) mounted on the outer wall of the centrifuge stabilizing base (1), a drive shaft (7) connected to the output end of the first drive motor (2) via a drive assembly, the drive assembly including a first drive gear (3), one end of the first drive gear (3) fixedly connected to the output end of the first drive motor (2), the other end of the first drive gear (3) rotatably provided with a first fixing frame (4), a drive gear chain (5) meshing with the outer wall of the first drive gear (3), and a second drive gear (6) meshing with the inner wall of the drive gear chain (5). One end of the wheel (6) is fixedly connected to one end of the drive shaft (7); a first centrifugal mechanism is fixedly connected to the outer wall of the drive shaft (7), the first centrifugal mechanism includes a third fixed frame (8), a first centrifugal frame (9) is fixedly connected to the outer wall of the third fixed frame (8), a second through groove (16) is opened on the outer wall of the first centrifugal frame (9), and multiple second through grooves (16) are provided; a second fixed frame (102) is fixedly connected to the inner wall of the centrifuge body (101), the second fixed frame (102) is sleeved on the outer wall of the first centrifugal frame (9), the second fixed frame (102) is set as a mesh structure, a second spiral auger (15) is fixedly connected to the outer wall of the first centrifugal frame (9), the second spiral auger (15) The outer contour matches the inner contour of the second fixed frame (102); the outer wall of the centrifuge body (101) is equipped with a second drive motor (17), the output end of the second drive motor (17) is equipped with a transmission mechanism, the transmission mechanism includes a bevel gear group (18), one end of the bevel gear group (18) is fixedly connected to the output end of the second drive motor (17), and a horizontal shaft (19) is fixedly connected to the inner wall of the bevel gear group (18); one end of the horizontal shaft (19) is rotatably connected to the inner wall of the centrifuge body (101), and a third drive gear (20) is fixedly connected to the other end of the horizontal shaft (19), and a drive gear ring (21) is meshed with the outer wall of the third drive gear (20). A third centrifuge frame (22) is fixedly connected to the inner wall of the ring (21). The third centrifuge frame (22) is configured as a mesh structure. One end of the third centrifuge frame (22) is rotatably connected to the inner wall of the centrifuge body (101) through a ball bearing (2201). A first guide rod (23) is fixedly connected to the outer wall of the first centrifuge frame (9). A scraping mechanism is assembled on the inner wall of the third centrifuge frame (22). The scraping mechanism includes a second guide rod (25). The ends of the second guide rod (25) and the first guide rod (23) are provided with abutting slopes (26). A return spring (24) is sleeved on the outer wall of the second guide rod (25). One end of the return spring (24) is fixedly connected to the inner wall of the third centrifuge frame (22).

2. The apparatus for preparing IB crystal form aspartame by recrystallization according to claim 1, characterized in that: The other end of the reset spring (24) is fixedly connected to an arc plate (27). The outer wall of the arc plate (27) is fixedly connected to the other end of the second guide rod (25). The arc plate (27) is set as a semi-circular arc plate. The outer wall of the arc plate (27) is fixedly connected to multiple scrapers (28) for cleaning the inner wall of the third centrifugal frame (22).

3. The apparatus for preparing IB crystal form aspartame by recrystallization according to claim 2, characterized in that: The inner wall of the third centrifuge frame (22) is provided with a second centrifuge frame (11). One end of the second centrifuge frame (11) is fixedly connected to the outer wall of the first centrifuge frame (9). The outer wall of the second centrifuge frame (11) is fixedly connected with a first spiral auger (13). The outer contour of the first spiral auger (13) matches the inner contour of the third centrifuge frame (22). The outer wall of the second centrifuge frame (11) is provided with multiple water leakage holes (1101).

4. The apparatus for recrystallization preparation of IB crystal form aspartame according to claim 3, characterized in that: The outer wall of the centrifuge body (101) is connected to a feed pipe (10), and the outer wall of the feed pipe (10) is fixedly connected to a conveying pipe (12). The conveying pipe (12) is used to convey into the first centrifuge frame (9). The outer wall of the centrifuge body (101) is equipped with a sealing door (103), and the outer wall of the centrifuge body (101) is connected to a water outlet pipe (104).

5. A process for preparing IB crystal form aspartame by recrystallization, using the preparation apparatus described in any one of claims 1-4, characterized in that: include: S1. Raw material mixing: First, add the raw materials and pure water required for aspartame production to the heating and stirring vessel (29). Dilute the aspartame raw materials with pure water at a concentration of 3%. Then start the heating and stirring vessel (29) to stir and mix the raw materials. During the mixing process, the vessel is heated to raise the temperature of the mixed solution so that the temperature of the mixed solution is less than or equal to 65 degrees Celsius. S2, Static Crystallization: After the mixed solution in step S1 is mixed evenly, it is transferred to a solution mixing dish (30), and at the same time, chilled water is introduced into the solution mixing dish (30) to cool it down. The temperature is dynamically measured in real time with a temperature measuring instrument until the temperature of the mixed solution in the solution mixing dish (30) drops to the range of 30 to 40 degrees Celsius. Then, the mixed solution in the solution mixing dish (30) is kept static. S3, Solution rinsing: The mixed solution that has been cooled in step S3 is introduced into the crystal culture vessel (31) for static crystallization. After crystallization, a solution that can dissolve impurities in the crystal is introduced into the crystal culture vessel (31) for cleaning, and the crystal culture vessel (31) is started to stir the inside for wet granulation. S4. Centrifugal separation: The mixture of crystals and solution from step S3 is introduced into the centrifuge body (101) through the feed pipe (10) for centrifugal separation to separate the crystals from the solution. Finally, the sealed door (103) is opened to collect the crystals, thus completing the preparation of aspartame crystals.

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