Rotor device in crystallization kettle

Abstract

The utility model belongs to the field of low-temperature crystallization equipment, and particularly discloses a rotor device in a crystallization kettle. The rotor device in the crystallization kettle comprises a rotating shaft used for being installed in the crystallization kettle, a plurality of paddle wheels are arranged on the rotating shaft in the axial direction at intervals, each paddle wheel is provided with a plurality of paddles arranged around the rotating shaft, and a material scraping device used for scraping materials on the inner wall of the crystallization kettle is arranged between at least one pair of paddles of the adjacent paddle wheels. According to the utility model, the paddle wheel with the plurality of paddles is arranged on the rotating shaft, and the material scraping devices are arranged among the paddles, so that the mixing effect of materials in the kettle is improved, the removal effect of cured materials attached to the inner wall of the crystallization kettle is improved, and the cured materials can be smoothly output outwards; the rotor device in the crystallization kettle is applied to the crystallization kettle, so that the working efficiency of low-temperature crystallization equipment can be remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of low-temperature crystallization equipment, specifically to a rotor device inside a crystallization kettle. Background Technology

[0002] Low-temperature evaporation crystallization equipment is an industrial device that achieves solid-liquid separation by lowering the boiling point through negative pressure. The equipment mainly consists of a crystallization vessel. After the material is loaded into the vessel, heating and vacuuming cause the material to boil, concentrate, and crystallize. A rotor device is installed inside the crystallization vessel; its rotation ejects the solidified material from the vessel.

[0003] Most rotor devices in existing technologies are spiral structures, similar to augers. For example, utility model patent CN216604114U discloses a vacuum low-temperature evaporation crystallization device for preventing scaling. This device includes an evaporator (i.e., a crystallization vessel) with spiral propulsion blades (i.e., a rotor device) inside. After crystals are formed, the spiral propulsion blades promptly push the crystals from the crystallization outlet to the solid waste tank.

[0004] However, the rotor device with a spiral structure has the following disadvantages: the spiral propulsion blades have a strong obstruction effect on the flow of materials in the crystallization vessel, making it difficult for the crystals in the vessel to be discharged, thereby reducing the efficiency of material concentration and crystallization.

[0005] Based on the aforementioned technical problems, there is an urgent need to improve the existing rotor device inside the crystallizer. Utility Model Content

[0006] The purpose of this invention is to provide an internal rotor device for a crystallizer, which solves the problem in the prior art where the spiral propulsion blades obstruct the flow of materials inside the crystallizer, leading to a decrease in the efficiency of material concentration and crystallization.

[0007] To achieve the above objectives, this utility model discloses an internal rotor device for a crystallization vessel, comprising a rotating shaft for installation within the crystallization vessel. Multiple paddle wheels are axially spaced along the rotating shaft, each paddle wheel having multiple blades arranged around the shaft. A material scraping device for scraping material from the inner wall of the crystallization vessel is provided between at least one pair of blades of adjacent paddle wheels. This internal rotor device can be installed and used within the crystallization vessel. Its operation is as follows: the rotating shaft can be connected to a power device such as an electric motor. When the rotating shaft rotates at a low speed, the paddle wheels stir the material within the crystallization vessel, facilitating heat transfer between the upper and lower layers of the material, particularly suitable for bottom-heated reaction vessels. Simultaneously, the material scraping device scrapes away solidified material adhering to the inner wall of the crystallization vessel, preventing the solidified material from adhering tightly to the inner wall and becoming difficult to remove. When the crystallization and concentration process is complete and the material needs to be discharged from the crystallization vessel, the rotation speed of the rotating shaft can be appropriately increased. The material scraping device can further scrape away the solidified material adhering to the inner wall of the crystallization vessel. The paddle wheels at a suitable rotation speed push the solidified material, thereby outputting the solidified material from the crystallization vessel outwards. In this invention, a paddle wheel with multiple blades replaces the integral spiral propulsion paddle in the prior art. This not only reduces the obstruction to the material, but also stirs the material evenly through the rotation of the paddle wheel, thereby carrying the heat from the lower layer to the upper layer and improving the overall heating effect of the material. In addition, the paddle wheel blades also serve to connect and support the material scraping device. By cooperating with the material scraping device, it prevents the solidified material from accumulating on the inner wall of the crystallization vessel.

[0008] Furthermore, the impeller has three blades, and three types of material scraping devices are provided between the three pairs of blades of two adjacent impellers; the first type of material scraping device includes several first connecting frames disposed between two blades, and multiple scraping teeth are spaced apart along the axis of rotation on the first connecting frames; the second type of material scraping device includes a second connecting frame disposed between two blades, and multiple fixed scrapers are spaced apart along the axis of rotation on the second connecting frame; the third type of material scraping device includes a third connecting frame disposed between two blades, and multiple movable scrapers are spaced apart along the axis of rotation on the third connecting frame, the movable scrapers are mounted on the third connecting frame in a manner that allows them to slide radially along the axis of rotation, and an elastic buffer element is provided between the movable scrapers and the third connecting frame. With the above structure, as the material scraping device rotates with the shaft, the scraper teeth on the first material scraping device can scrape off part of the solidified material adhering to the inner wall of the crystallization vessel, making the remaining adhering crystals looser and easier to scrape off. The fixed scraper has a further scraping effect on the adhering solidified material, and the moving scraper, under the action of the elastic buffer element, can fit against the inner wall of the crystallization vessel, thereby cleaning off the solidified material on the inner wall of the crystallization vessel. Therefore, the combination of the three material scraping devices greatly improves the scraping effect on the solidified material on the inner wall of the crystallization vessel.

[0009] Furthermore, the rotating shaft is equipped with at least three paddle wheels, and the material scraping devices between different paddle wheels are arranged in rows along the axial direction of the rotating shaft. Adjacent material scraping devices in the same row are of different types; if the number of material scraping devices in the same row is greater than or equal to three, then the types of the three adjacent material scraping devices are all different. With this structure, the types of material scraping devices in the same row are arranged sequentially, which helps to balance the forces on the rotating shaft in various directions. In addition, this arrangement allows for better coordination with paddle wheels having multiple blades, enabling continuous cleaning of solidified material inside the crystallization vessel.

[0010] Furthermore, the fixed scraper is tilted to one side relative to the rotation direction of the rotating shaft, the movable scraper is tilted to one side relative to the rotation direction of the rotating shaft, and the blade is twisted with its end away from the rotating shaft tilted to one side relative to the rotation direction of the rotating shaft. The tilting directions of the fixed scraper, movable scraper, and blade ends away from the rotating shaft are consistent. With this structure, the tilted ends of the fixed scraper, movable scraper, and blades away from the rotating shaft help reduce the resistance to the rotor device during the removal of solidified material, while improving the removal effect on the adhered solidified material. The consistent tilting direction of the three components allows for good coordination with the blades, facilitating the output of the solidified material.

[0011] Furthermore, the material scraping device includes several first connecting frames disposed between the two blades, and multiple scraping teeth are spaced apart along the axial direction of the rotating shaft on the first connecting frames. With the above structure, the scraping teeth can scrape off part of the solidified material adhering to the inner wall of the crystallization vessel, making the remaining part of the solidified material looser and easier to scrape off.

[0012] Furthermore, the material scraping device includes a second connecting frame disposed between the two blades. Multiple fixed scrapers are spaced apart along the axial direction of the rotating shaft on the second connecting frame, and the fixed scrapers are inclined to one side relative to the rotation direction of the rotating shaft. With this structure, the fixed scrapers have a dual function of crushing and scraping the adhered solidified material; the inclined arrangement of the fixed scrapers helps reduce resistance and promotes the output of the solidified material.

[0013] Furthermore, the material scraping device includes a third connecting frame disposed between the two blades. Multiple movable scrapers are spaced apart along the axial direction of the rotating shaft on the third connecting frame. The movable scrapers are inclined to one side relative to the rotation direction of the rotating shaft and are mounted on the third connecting frame in a manner that allows them to slide radially along the rotating shaft. An elastic buffer element is provided between the movable scrapers and the third connecting frame. With this structure, the movable scrapers, under the action of the elastic buffer element, can adhere to the inner wall of the crystallization vessel, thereby cleaning the solidified material on the inner wall of the crystallization vessel. The inclined arrangement of the movable scrapers helps to reduce resistance and promotes the outward output of the crushed solidified material.

[0014] Furthermore, the fixed scraper includes a head, a body, and a tail connected in sequence. The body is narrower than the head, and the middle part of the body is connected to the head. The tail is bent to one side and fixed to the second connecting frame. The head gradually narrows inward from the side closest to the body to the side furthest from the body. With the above structure, the tail of the fixed scraper is used to connect to the second connecting frame, the body provides support, the narrower body than the head helps reduce resistance, and the wider head than the body helps improve the scraping effect on the solidified material.

[0015] Furthermore, the third connecting frame includes a first plate and a second plate spaced apart. A movable scraper is connected to a first connecting post and a second connecting post spaced apart. Both the first and second plates have through holes through which the first and second connecting posts pass. Each first connecting post passes through the through holes in the first and second plates and is connected to a limit stop. The elastic buffer element includes a spring fitted onto the first and second connecting posts, located between the movable scraper and the first plate. With this structure, the first and second connecting posts, in conjunction with the through holes on the third connecting frame, not only provide guidance but also prevent the movable scraper from rotating. The spring not only provides buffering but also allows the movable scraper to better fit against the inner wall of the crystallizing vessel, thereby effectively scraping away the solidified material from the inner wall.

[0016] Furthermore, the impeller includes a central disk fixedly connected to the rotating shaft, with multiple blades arranged around the edge of the central disk. The blades are twisted, and the ends of the blades furthest from the rotating shaft are inclined to one side relative to the direction of rotation of the shaft. With the above structure, the central disk is used to connect the rotating shaft, the blades serve to support the material scraping device, and the blades also have the functions of stirring the material, scraping off the solidified material adhering to the inner wall of the crystallization vessel, and crushing and conveying the solidified material.

[0017] In summary, the beneficial effects of this utility model are as follows: By setting a paddle wheel with multiple blades on the rotating shaft and setting a material scraping device between the blades, this utility model improves the mixing effect of the material in the reactor, improves the removal effect of the solidified material adhering to the inner wall of the crystallization reactor, and can smoothly output the solidified material to the outside. The application of this internal rotor device in the crystallization reactor can significantly improve the working efficiency of the low temperature crystallization equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0019] Figure 2 yes Figure 1 The illustrated embodiment is a front view taken from one of the directions;

[0020] Figure 3 This is a schematic diagram of the structure of the first material scraping device in this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the second type of material scraping device in this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the third type of material scraping device in this utility model;

[0023] Figure 6 yes Figure 4 An enlarged view of part of the structure of the second type of material scraping device shown.

[0024] In the diagram: 1. Rotating shaft, 2. Paddle wheel, 201. Central disc, 202. Paddle blade, 4. Material scraping device, 5. First connecting frame, 6. Scraper teeth, 7. Second connecting frame, 8. Fixed scraper, 801. Head, 802. Body, 803. Tail, 9. Third connecting frame, 901. First plate, 902. Second plate, 10. Moving scraper, 11. Elastic buffer element, 12. First connecting column, 13. Second connecting column, 14. Through hole, 15. Limiting block. Detailed Implementation

[0025] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0026] Reference Figure 1 , Figure 2In some embodiments of this utility model, the internal rotor device of the crystallization vessel includes a rotating shaft 1 for installation inside the crystallization vessel. Multiple paddle wheels 2 are axially spaced on the rotating shaft 1, and each paddle wheel 2 has multiple blades 202 arranged around the rotating shaft 1. A material scraping device 4 for scraping material from the inner wall of the crystallization vessel is provided between at least one pair of blades 202 of adjacent paddle wheels 2. This internal rotor device can be installed inside the crystallization vessel and used as follows: The rotating shaft 1 can be connected to a power device such as an electric motor. When the rotating shaft 1 rotates at a low speed, the paddle wheels 2 have a stirring effect on the material inside the crystallization vessel, which is beneficial for heat transfer between the upper and lower layers of the material, especially suitable for bottom-heated reaction vessels. At the same time, the material scraping device 4 can scrape off the solidified material adhering to the inner wall of the crystallization vessel, preventing the solidified material from tightly adhering to the inner wall of the crystallization vessel and being difficult to remove. When the crystallization and concentration process is completed and the material inside the crystallization vessel needs to be discharged, the rotation speed of the rotating shaft 1 can be appropriately increased. The material scraping device 4 can further scrape off the solidified material adhering to the inner wall of the crystallization vessel. The paddle wheels 2 at a suitable rotation speed have a pushing effect on the solidified material, thereby outputting the solidified material from the crystallization vessel outwards. In this invention, a paddle wheel 2 with multiple blades 202 replaces the integral spiral propulsion blade, which not only reduces the obstruction to the material, but also has the effect of stirring the material evenly through the rotation of the paddle wheel 2, thereby carrying the heat from the lower layer to the upper layer and improving the overall heating effect of the material; in addition, the blades 202 of the paddle wheel 2 also have the function of connecting and supporting the material scraping device 4, and by cooperating with the material scraping device 4, the solidified material is prevented from accumulating on the inner wall of the crystallization vessel.

[0027] Reference Figure 1 , Figure 2 In some embodiments of this utility model, the impeller 2 includes a central disk 201 fixedly connected to the rotating shaft 1. Multiple blades 202 are arranged around the edge of the central disk 201. The blades 202 are twisted, and the ends of the blades 202 away from the rotating shaft 1 are inclined to one side relative to the rotation direction of the rotating shaft 1. With the above improvements, the central disk 201 is used to connect the rotating shaft 1, and the blades 202 serve to support the material scraping device 4. The blades 202 also have the functions of stirring the material, scraping off the solidified material adhering to the inner wall of the crystallization vessel, and crushing and conveying the solidified material.

[0028] Reference Figures 1 to 5In some embodiments of this utility model, the paddle wheel 2 has three blades 202, and three types of material scraping devices 4 are provided between the three pairs of blades 202 of two adjacent paddle wheels 2; the first type of material scraping device includes a plurality of first connecting frames 5 disposed between two blades 202, and a plurality of scraping teeth 6 are provided on the first connecting frames 5 at intervals along the axial direction of the rotating shaft 1; the second type of material scraping device includes a second connecting frame 7 disposed between two blades 202, and a plurality of fixed scraper blades 8 are provided on the second connecting frame 7 at intervals along the axial direction of the rotating shaft 1; the third type of material scraping device includes a third connecting frame 9 disposed between two blades 202, and a plurality of movable scraper blades 10 are provided on the third connecting frame 9 at intervals along the axial direction of the rotating shaft 1, the movable scraper blades 10 are mounted on the third connecting frame 9 in a manner that allows them to slide radially along the rotating shaft 1, and an elastic buffer element 11 is provided between the movable scraper blades 10 and the third connecting frame 9. After the above improvements, when the material scraping device rotates with the rotating shaft 1, the scraper teeth 6 on the first material scraping device can scrape off part of the solidified material adhering to the inner wall of the crystallization vessel, making the remaining adhering crystals looser and easier to scrape off. The fixed scraper 8 has a further scraping effect on the adhering solidified material, and the moving scraper 10 can fit against the inner wall of the crystallization vessel under the action of the elastic buffer element 11, thereby cleaning off the solidified material on the inner wall of the crystallization vessel. The combination of the three material scraping devices greatly improves the scraping effect on the solidified material on the inner wall of the crystallization vessel.

[0029] Reference Figure 1 , Figure 2 In some embodiments of this utility model, at least three paddle wheels 2 are provided on the rotating shaft 1, and the material scraping devices 4 between different paddle wheels 2 on the rotating shaft 1 are arranged in a row along the axial direction of the rotating shaft 1. The two adjacent material scraping devices 4 in the same row are of different types; if the number of material scraping devices 4 in the same row is greater than or equal to three, then the three adjacent material scraping devices 4 are all of different types. After the above improvement, the types of material scraping devices 4 in the same row are arranged in sequence, which is beneficial to balancing the force on the rotating shaft 1 in various directions; in addition, this arrangement can better cooperate with the paddle wheels 2 with multiple blades 202 to realize the continuous progress of cleaning the solidified matter in the crystallization vessel.

[0030] Reference Figure 1 , Figure 2In some embodiments of this utility model, the fixed scraper 8 is inclined to one side relative to the rotation direction of the rotating shaft 1, the movable scraper 10 is inclined to one side relative to the rotation direction of the rotating shaft 1, and the blade 202 is twisted with its end away from the rotating shaft 1 inclined to one side relative to the rotation direction of the rotating shaft 1. The inclination directions of the fixed scraper 8, the movable scraper 10, and the blade 202 away from the rotating shaft 1 are consistent. With the above improvements, the inclined arrangement of the fixed scraper 8, the movable scraper 10, and the blade 202 away from the rotating shaft 1 helps to reduce the resistance to the rotor device during the scraping of the solidified material, while improving the scraping effect on the attached solidified material. The consistent inclination direction of the three scrapers allows for good coordination with the blade 202, which is beneficial for promoting the output of the solidified material.

[0031] exist Figure 1 , Figure 2 In the illustrated embodiment, the impeller 2 employs a three-blade structure 202. A material scraping device 4 is provided between each of the three pairs of blades 202 of adjacent impellers 2, and the three material scraping devices 4 between adjacent impellers 2 are all different. In other embodiments of this invention, the number of blades 202 on the impeller 2 can be two, four, or other numbers, and the material scraping device 4 can be provided only between some of the pairs of blades 202 of adjacent impellers 2. The material scraping device 4 between adjacent impellers 2 can be... Figure 3 To the diagram Figure 5 Any of the material scraping devices 4 shown:

[0032] Reference Figure 3 The first material scraping device 4 includes several first connecting frames 5 disposed between two blades 202, and multiple scraping teeth 6 are arranged at intervals along the axial direction of the rotating shaft 1 on the first connecting frames 5. After the above improvement, the scraping teeth 6 can scrape off part of the solidified material attached to the inner wall of the crystallization vessel, making the remaining part of the solidified material looser and easier to scrape off.

[0033] Reference Figure 4 The second type of material scraping device 4 includes a second connecting frame 7 located between two blades 202. Multiple fixed scraper blades 8 are spaced apart along the axial direction of the rotating shaft 1 on the second connecting frame 7. The fixed scraper blades 8 are inclined to one side relative to the rotation direction of the rotating shaft 1. With the above improvements, the fixed scraper blades 8 have a dual function of crushing and scraping the adhered solidified material; the inclined arrangement of the fixed scraper blades 8 helps reduce resistance and promotes the output of the solidified material. Figure 6The specific structure of one embodiment of the fixed scraper 8 is shown: the fixed scraper 8 includes a head 801, a body 802, and a tail 803 connected in sequence. The body 802 is narrower than the head 801 and is connected to the middle part of the head 801. The tail 803 is bent to one side and fixed to the second connecting frame 7. The head 801 gradually narrows from the side closer to the body 802 to the side farther away from the body 802. With the above improvements, the tail 803 of the fixed scraper 8 is used to connect to the second connecting frame 7, the body 802 plays a supporting role, the body 802 being narrower than the head 801 helps to reduce resistance, and the head 801 being wider than the body 802 helps to improve the scraping effect on the solidified material.

[0034] Reference Figure 5 The third type of material scraping device 4 includes a third connecting frame 9 located between two blades 202. Multiple movable scrapers 10 are spaced apart along the axial direction of the rotating shaft 1 on the third connecting frame 9. The movable scrapers 10 are inclined to one side relative to the rotation direction of the rotating shaft 1. The movable scrapers 10 are mounted on the third connecting frame 9 in a manner that allows them to slide radially along the rotating shaft 1. An elastic buffer element 11 is provided between the movable scrapers 10 and the third connecting frame 9. With the above improvements, the movable scrapers 10 can adhere to the inner wall of the crystallization vessel under the action of the elastic buffer element 11, thereby cleaning the solidified material on the inner wall of the crystallization vessel. The inclined arrangement of the movable scrapers 10 helps to reduce resistance and promotes the outward output of the solidified material after crushing.

[0035] Figure 5 A more specific structure of one embodiment of the third material scraping device 4 is shown: the third connecting frame 9 includes a first plate 901 and a second plate 902 spaced apart. The movable scraper 10 is connected to a first connecting post 12 and a second connecting post 13 spaced apart. Both the first plate 901 and the second plate 902 are provided with through holes 14 for the first connecting posts 12 and 13 to pass through. The first connecting posts 12 pass through the through holes 14 on the first plate 901 and the second plate 902 in sequence and are connected to limit blocks 15. The elastic buffer element 11 includes a spring fitted on the first connecting post 12 and the second connecting post 13, and the spring is located between the movable scraper 10 and the first plate 901. After the above improvement, the first connecting post 12 and the second connecting post 13 cooperate with the through holes 14 on the third connecting frame 9, which not only plays a guiding role, but also prevents the movable scraper 10 from rotating. The spring not only has a buffering role, but also allows the movable scraper 10 to better fit with the inner wall of the crystallizing vessel, thereby cleaning the solidified material on the inner wall.

[0036] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A rotor device for an internal crystallizer, comprising a rotating shaft (1) for installation within the crystallizer, characterized in that, The rotating shaft (1) is provided with a plurality of paddle wheels (2) spaced axially. Each paddle wheel (2) has a plurality of blades (202) arranged around the rotating shaft (1). A material scraping device (4) for scraping off the material inside the crystallizing vessel is provided between at least one pair of blades (202) of adjacent paddle wheels (2).

2. The internal rotor device of the crystallizing vessel as described in claim 1, characterized in that, The paddle wheel (2) has three blades (202), and three types of material scraping devices (4) are provided between the three pairs of blades (202) of two adjacent paddle wheels (2); the first type of material scraping device includes several first connecting frames (5) provided between two blades (202), and multiple scraping teeth (6) are provided on the first connecting frames (5) at intervals along the axis of rotation (1); the second type of material scraping device includes a second connecting frame (7) provided between two blades (202), and multiple fixed scrapers (8) are provided on the second connecting frame (7) at intervals along the axis of rotation (1); the third type of material scraping device includes a third connecting frame (9) provided between two blades (202), and multiple movable scrapers (10) are provided on the third connecting frame (9) at intervals along the axis of rotation (1). The movable scrapers (10) are mounted on the third connecting frame (9) in a manner that allows them to slide radially along the axis of rotation (1), and an elastic buffer element (11) is provided between the movable scrapers (10) and the third connecting frame (9).

3. The internal rotor device of the crystallizing vessel as described in claim 1, characterized in that, At least three paddle wheels (2) are provided on the rotating shaft (1). The material scraping devices (4) between different paddle wheels (2) on the rotating shaft (1) are arranged in a row along the axial direction of the rotating shaft (1). The two adjacent material scraping devices (4) in the same row are of different types. If the number of material scraping devices (4) in the same row is greater than or equal to three, then the three adjacent material scraping devices (4) are all of different types.

4. The internal rotor device of the crystallizing vessel as described in claim 2, characterized in that, The fixed scraper (8) is tilted to one side relative to the rotation direction of the rotating shaft (1), the movable scraper (10) is tilted to one side relative to the rotation direction of the rotating shaft (1), the blade (202) is twisted and the end of the blade (202) away from the rotating shaft (1) is tilted to one side relative to the rotation direction of the rotating shaft (1), and the tilting directions of the fixed scraper (8), the movable scraper (10) and the end of the blade (202) away from the rotating shaft (1) are consistent.

5. The internal rotor device of the crystallizing vessel as described in claim 1, characterized in that, The material scraping device (4) includes several first connecting frames (5) disposed between two blades (202), and multiple scraping teeth (6) are provided on the first connecting frames (5) at intervals along the axial direction of the rotating shaft (1).

6. The internal rotor device of the crystallizing vessel as described in claim 1, characterized in that, The material scraping device (4) includes a second connecting frame (7) located between two blades (202). Multiple fixed scrapers (8) are arranged at intervals along the axial direction of the rotating shaft (1) on the second connecting frame (7). The fixed scrapers (8) are inclined to one side relative to the rotation direction of the rotating shaft (1).

7. The internal rotor device of the crystallizing vessel as described in claim 1, characterized in that, The material scraping device (4) includes a third connecting frame (9) disposed between two blades (202). Multiple movable scrapers (10) are arranged axially along the rotating shaft (1) on the third connecting frame (9). The movable scrapers (10) are inclined to one side relative to the rotation direction of the rotating shaft (1). The movable scrapers (10) are mounted on the third connecting frame (9) in a manner that allows them to slide radially along the rotating shaft (1). An elastic buffer element (11) is provided between the movable scrapers (10) and the third connecting frame (9).

8. The internal rotor device of the crystallizing vessel as described in claim 2 or 6, characterized in that, The fixed scraper (8) includes a head (801), a body (802), and a tail (803) connected in sequence. The body (802) is narrower than the head (801). The body (802) is connected to the middle part of the head (801). The tail (803) is bent to one side and fixed on the second connecting frame (7). The head (801) gradually narrows from the side close to the body (802) to the side away from the body (802).

9. The internal rotor device of the crystallizing vessel as described in claim 2 or 7, characterized in that, The third connecting frame (9) includes a first plate (901) and a second plate (902) spaced apart. The movable scraper (10) is connected to a first connecting post (12) and a second connecting post (13) spaced apart. The first plate (901) and the second plate (902) are each provided with through holes (14) for the first connecting post (12) and the second connecting post (13) to pass through. The first connecting post (12) passes through the through holes (14) on the first plate (901) and the second plate (902) in sequence and is connected to a limit stop (15). The elastic buffer element (11) includes a spring fitted on the first connecting post (12) and the second connecting post (13). The spring is located between the movable scraper (10) and the first plate (901).

10. The internal rotor device of the crystallizing vessel as described in claim 1, characterized in that, The propeller (2) includes a central disk (201) fixedly connected to the rotating shaft (1). Multiple blades (202) are arranged around the edge of the central disk (201). The blades (202) are twisted and the ends of the blades (202) away from the rotating shaft (1) are tilted to one side relative to the rotation direction of the rotating shaft (1).

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