Itaconic acid concentration and crystallization device

Abstract

The invention relates to the technical field of concentration and crystallization devices, and discloses an itaconic acid concentration and crystallization device which comprises a tank body, a cover is arranged at the top of the tank body, a discharge pipe is arranged at the bottom of the tank body, an eccentric stirring mechanism is arranged on the tank body, and a reverse stirring mechanism is arranged on the inner wall of the tank body. According to the itaconic acid concentration and crystallization device, an eccentric stirring mechanism is arranged, so that a first rotating plate, a second rotating plate and a connecting block reciprocate while rotating in the stirring process, efficient mixing and homogenization of liquid are achieved, the laminar flow state of the liquid can be broken through reciprocating motion, flowing of the liquid with different temperatures and concentrations is enhanced, and the crystallization efficiency is improved. According to the present invention, the uniform precipitation of the crystal is promoted, the local supersaturation or insufficient saturation phenomenon is avoided, and in addition, the movement can improve the heat exchange efficiency and ensure the uniform distribution of the temperature during the crystallization process so as to optimize the product quality, improve the crystallization efficiency, and integrally improve the working performance and the production efficiency of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of concentration and crystallization devices, in particular to an itaconic acid concentration and crystallization device. Background Art

[0002] Itaconic acid concentrated crystallization is a process that uses crystallization technology to extract and purify itaconic acid from itaconic acid solution. The process usually involves lowering the solution temperature or changing the solution concentration to promote the precipitation of itaconic acid from the solution. Itaconic acid is an important biosynthetic intermediate and is widely used in pharmaceuticals, food, and cosmetics. The advantage of concentrated crystallization is that it can obtain high-purity products and reduce impurities, thereby improving the effect and safety of subsequent applications.

[0003] In the process of itaconic acid concentration and crystallization, it is difficult to achieve homogenization with simple stirring, because simple stirring easily forms circulation and eddy currents, causing the liquid to form a certain flow pattern around the agitator, resulting in part of the liquid being stationary for a long time, and thus unable to be effectively mixed, resulting in temperature and concentration gradients. In addition, the concentration of the solute in the solution is unevenly distributed due to gravity. A single stirring method is difficult to quickly and evenly mix liquids of different concentrations, resulting in local oversaturation or undersaturation, thereby affecting the precipitation and growth of crystals. Poor homogenization can lead to uneven crystal growth, the formation of irregular or larger crystals, and reduced product purity and quality. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides an itaconic acid concentration and crystallization device, which solves the problem that simple stirring is difficult to achieve a homogenization effect, resulting in uneven crystal growth and reduced product purity.

[0006] (II) Technical solution

[0007] To achieve the above object, the present invention provides the following technical solution: an itaconic acid concentration and crystallization device, comprising a tank body, a cover is provided on the top of the tank body, a discharge pipe is provided on the bottom of the tank body, an eccentric stirring mechanism is provided on the tank body, a reverse stirring mechanism is provided on the inner wall of the tank body, and an inner wall scraping mechanism is provided on the inner wall of the tank body;

[0008] The eccentric stirring mechanism is used to stir the liquid in the tank body to homogenize, the reverse stirring mechanism is used to exchange the liquid in the tank body between the upper and lower layers, and the inner wall scraping mechanism is used to scrape the inner wall of the tank body.

[0009] Preferably, the eccentric stirring mechanism includes a driving motor, the driving motor is fixedly connected to the bottom of the tank body, the output shaft of the driving motor is fixedly connected to an intermittent gear, the bottom of the tank body is rotatably connected to a planetary gear, the top of the planetary gear is fixedly connected to a main shaft, the outer wall of the main shaft is hinged to one end of a first rotating plate, the other end of the first rotating plate is hinged to one end of a second rotating plate, the other end of the second rotating plate is hinged to a connecting block, the outer wall of the connecting block is fixedly connected to one end of a spring, and the other end of the spring is fixedly connected to the outer wall of the main shaft.

[0010] Preferably, the surface portion of the intermittent gear has no teeth, and the first rotating plate and the second rotating plate are arranged in two groups, and the two groups of the first rotating plates and the second rotating plates are arranged symmetrically.

[0011] Preferably, the main shaft is eccentrically arranged, and the outer wall of the main shaft is rotatably connected to the inner wall of the tank body.

[0012] Preferably, the reverse stirring mechanism includes a connecting rod, one end of the connecting rod is fixedly connected to the bottom of the inner wall of the tank body, the other end of the connecting rod is rotatably connected to a lower gear ring, the outer wall of the connecting rod is rotatably connected to a transmission gear, the outer wall of the connecting rod is rotatably connected to an upper gear ring, and the top of the upper gear ring is fixedly connected to an impeller.

[0013] Preferably, an annular gear ring is provided on the top of the lower gear ring member, and the outer wall of the transmission gear is meshed with the annular gear ring of the lower gear ring member.

[0014] Preferably, an annular gear ring is provided at the bottom of the upper gear ring member, and the annular gear ring at the bottom of the upper gear ring member is meshed with the transmission gear.

[0015] Preferably, the inner wall scraping mechanism includes a gear plate, which is fixedly connected to the outer wall of the main shaft, the bottom of the inner wall of the tank body is rotatably connected to an intermediate gear, the bottom of the inner wall of the tank body is rotatably connected to a bottom gear ring, the top of the bottom gear ring is rotatably connected to a wiping piece, the top of the wiping piece is fixedly connected to a top gear, and the top of the tank body is fixedly connected to a top gear ring.

[0016] Preferably, the outer wall of the gear plate is meshed with the intermediate gear, an inner gear ring is provided on the inner wall of the bottom gear ring, and an inner gear ring is provided on the inner wall of the top gear ring.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the present invention provides an itaconic acid concentration and crystallization device, which has the following beneficial effects:

[0019] 1. The itaconic acid concentration crystallization device is arranged with an eccentric stirring mechanism, so that during the stirring process, the first rotating plate, the second rotating plate and the connecting block rotate and reciprocate at the same time, thereby realizing efficient mixing and homogenization of the liquid. The reciprocating motion can break the laminar state of the liquid, enhance the flow between liquids of different temperatures and concentrations, promote the uniform precipitation of crystals, and avoid local oversaturation or undersaturation. In addition, this motion can also improve the heat exchange efficiency and ensure the uniform distribution of temperature during the crystallization process, thereby optimizing the quality of the product and improving the crystallization efficiency, and overall improving the working performance and production efficiency of the equipment.

[0020] 2. The itaconic acid concentration and crystallization device is arranged using an eccentric stirring mechanism, and the stirring part is arranged at an eccentric position. The eccentric design can break the symmetrical flow pattern and produce uneven flow and turbulence, which can effectively promote the rapid mixing of liquids of different concentrations and temperatures and reduce local oversaturation or undersaturation. In addition, the eccentric position can also improve the power efficiency of the stirring mechanism, because the eccentric design makes the flow path generated by the stirring blade during the movement more complex, increases the turbulent intensity of the liquid, thereby improving the overall mixing efficiency, ensuring the uniform distribution of the liquid in the tank, optimizing heat exchange, and improving the overall efficiency of the crystallization process, thereby improving the quality and consistency of the product.

[0021] 3. The itaconic acid concentration crystallization device uses a reverse stirring mechanism. The impeller drives the liquid at the top to flow to the eccentric stirring mechanism at the bottom, which increases the upper and lower exchange of the liquid, enhances the mixing and homogeneity of the liquid, promotes the effective combination of liquids of different temperatures and concentrations, prevents the occurrence of stratification, improves the solute dissolution rate during the crystallization process, and ensures the uniformity and quality of the product. In addition, this upper and lower liquid exchange can also improve the heat exchange efficiency and ensure the uniform distribution of temperature in the system, thereby optimizing the overall crystallization effect.

[0022] 4. The itaconic acid concentration and crystallization device is set up with an inner wall scraping mechanism. The main shaft drives the gear plate to rotate. The gear plate drives the bottom gear ring to rotate in the opposite direction of the main shaft through the intermediate gear. The bottom gear ring drives the wiping member to rotate in the opposite direction of the main shaft. At this time, the wiping member rotates in the opposite direction to the eccentric stirring mechanism, forming a convection in the opposite direction to the rotation direction of the eccentric stirring mechanism. This convection helps to break the static layer of the liquid, improve the fluidity of the liquid, and further enhance the mixing effect.

[0023] 5. The itaconic acid concentration and crystallization device utilizes an inner wall scraping mechanism to allow a wiping piece to wipe the inner wall of the tank. The role of the wiping piece in wiping the inner wall of the tank is mainly reflected in improving the homogenization effect. First, wiping can remove sediments and crystals on the inner wall to prevent these residues from affecting the mixing of the liquid, avoid the occurrence of local oversaturation or undersaturation, and ensure that the liquid state in the entire tank is uniform. In addition, the wiping piece can promote the circulation of the liquid during movement, thereby further improving the mixing efficiency, ensuring the consistency of temperature and concentration, and ultimately optimizing the crystallization process to improve the quality and consistency of the product.

[0024] 6. The itaconic acid concentration and crystallization device utilizes an inner wall scraping mechanism. The wiper can not only move linearly but also rotate when wiping the inner wall of the tank, thereby achieving a more comprehensive cleaning effect. The rotation can ensure that the wiper covers a wider area when in contact with the inner wall, effectively removing residues and sediments on the inner wall and improving cleaning efficiency. In addition, the rotation motion can also enhance the interaction between the wiper and the liquid, promote the flow of the liquid, further improve the homogenization effect, and ensure that the liquid state remains uniform during the crystallization process, thereby further optimizing the quality and purity of the final product. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of an itaconic acid concentration and crystallization device proposed by the present invention;

[0026] Figure 2 This is a schematic cross-sectional structure diagram of a tank body of an itaconic acid concentration and crystallization device proposed by the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of an intermittent gear of an itaconic acid concentration and crystallization device proposed by the present invention;

[0028] Figure 4 This is a schematic structural diagram of an eccentric stirring mechanism of an itaconic acid concentration and crystallization device proposed by the present invention;

[0029] Figure 5 A schematic structural diagram of a reverse stirring mechanism of an itaconic acid concentration and crystallization device proposed by the present invention;

[0030] Figure 6 The present invention provides a schematic structural diagram of an inner wall scraping mechanism for an itaconic acid concentration and crystallization device.

[0031] In the figure: 1. tank body; 2. cover; 3. discharge pipe; 4. eccentric stirring mechanism; 41. driving motor; 42. intermittent gear; 43. planetary gear; 44. main shaft; 45. first rotating plate; 46. second rotating plate; 47. connecting block; 48. spring; 5. reverse stirring mechanism; 51. connecting rod; 52. transmission gear; 53. lower gear ring; 54. upper gear ring; 55. impeller; 6. inner wall scraping mechanism; 61. gear plate; 62. intermediate gear; 63. bottom gear ring; 64. wiping member; 65. top gear; 66. top gear ring. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-Figure 6 , an itaconic acid concentration and crystallization device, comprising a tank body 1, the tank body 1 is an itaconic acid concentration and crystallization device, which can realize the heating function, and a cover 2 is arranged on the top of the tank body 1. In the itaconic acid concentration and crystallization device, the function of the cover 2 on the top of the tank body 1 is mainly to prevent external pollution, maintain the stability of the internal environment, avoid the loss of volatile substances, and reduce the entry of dust and other impurities, which is helpful to control the reaction conditions and improve the quality and purity of the crystal. In addition, the cover 2 can also provide safety, prevent liquid overflow or accidental leakage, and ensure the safety and effectiveness of the operation process. The tank body A discharge pipe 3 is provided at the bottom of the tank body 1. The discharge pipe 3 is provided at the bottom of the tank body 1 mainly to facilitate the discharge of the crystallized liquid or sediment to ensure the continuity and efficiency of the operation. The discharge pipe 3 can help to timely remove the formed crystals or impurities to prevent them from accumulating in the tank body 1 and avoid affecting the subsequent process. In addition, the discharge pipe 3 is also convenient for cleaning and maintenance, so as to keep the equipment in good working condition and ensure the smooth progress of the production process. An eccentric stirring mechanism 4 is provided on the tank body 1, a reverse stirring mechanism 5 is provided on the inner wall of the tank body 1, and an inner wall scraping mechanism 6 is provided on the inner wall of the tank body 1;

[0034] The eccentric stirring mechanism 4 is used to stir the liquid in the tank body 1 to homogenize it. Its function is to enhance the mixing effect of the liquid by breaking the symmetrical flow pattern of the liquid. Compared with the central stirring, the eccentric setting can effectively promote the uniform distribution of liquids of different concentrations and temperatures, reduce local supersaturation, and ensure the uniform growth of crystals. In addition, the eccentric stirring mechanism 4 can increase the turbulence intensity and improve the heat exchange efficiency, thereby improving the overall production efficiency and product quality. The reverse stirring mechanism 5 is used to exchange the liquid in the tank body 1 between the upper and lower layers. Its function is to effectively break the laminar state of the liquid and promote the uniform distribution of liquids of different depths. The inner wall scraping mechanism 6 is used to scrape the inner wall of the tank body 1, and its function is to prevent the accumulation of crystallized materials and impurities on the inner wall, keep the inner wall clean, thereby ensuring good heat exchange efficiency and avoiding operational problems caused by scaling. In addition, the inner wall scraping mechanism 6 can reduce the workload of cleaning and maintenance, ensure the normal operation of the equipment, and improve production efficiency and product quality.

[0035] The eccentric stirring mechanism 4 includes a driving motor 41, which is fixedly connected to the bottom of the tank body 1. The output shaft of the driving motor 41 is fixedly connected to an intermittent gear 42. The bottom of the tank body 1 is rotatably connected to a planetary gear 43. The top of the planetary gear 43 is fixedly connected to a main shaft 44. The outer wall of the main shaft 44 is hinged to one end of a first rotating plate 45. The other end of the first rotating plate 45 is hinged to one end of a second rotating plate 46. The other end of the second rotating plate 46 is hinged to a connecting block 47. The outer wall of the connecting block 47 is fixedly connected to a spring. 48, and the other end of the spring 48 is fixedly connected to the outer wall of the main shaft 44. The surface part of the intermittent gear 42 has no teeth. After the intermittent gear 42 drives the planetary gear 43 to rotate for a period of time, the planetary gear 43 enters an intermittent state due to the toothless part. The first rotating plate 45 and the second rotating plate 46 are set in two groups. The two groups of first rotating plates 45 and second rotating plates 46 are set symmetrically. The main shaft 44 is eccentrically set. The outer wall of the main shaft 44 is rotatably connected to the inner wall of the tank body 1, so that the main shaft 44 rotates stably. Open the lid 2 on the top of the tank body 1, pour the raw materials to be concentrated and crystallized into the tank body 1, and then turn on the driving motor 41. The driving motor 41 drives the intermittent gear 42 to rotate. When the toothed part of the intermittent gear 42 meshes with the planetary gear 43, it drives the planetary gear 43 to rotate. When the toothless part of the intermittent gear 42 rotates to the side of the planetary gear 43, the planetary gear 43 is no longer driven. When the planetary gear 43 rotates, it drives the main shaft 44 to rotate. The main shaft 44 drives the first rotating plate 45, the second rotating plate 46, and the connecting block 47 to rotate. Under the action of centrifugal force, the connecting block 47 drives the spring 48 to stretch. At this time, the first rotating plate 45 and the second rotating plate 46 rotate relative to each other to a larger intersection angle, and the connecting block 47 moves away from the main shaft 44. When the planetary gear 43 stops rotating, the spring 48 drives the connecting block 47 to return, so that the first rotating plate 45 and the second rotating plate 46 rotate relative to each other to a smaller intersection angle, so that during the stirring process, the first rotating plate 45, the second rotating plate 46 and the connecting block 47 rotate and reciprocate at the same time, thereby realizing efficient mixing and homogenization of the liquid. The reciprocating motion can break the laminar state of the liquid, enhance the flow between liquids of different temperatures and concentrations, promote the uniform precipitation of crystals, and avoid local oversaturation or undersaturation. In addition, this motion can also improve the heat exchange efficiency and ensure the uniform distribution of temperature during the crystallization process, thereby optimizing the quality of the product and improving the crystallization efficiency, thereby improving the working performance and production efficiency of the equipment as a whole.

[0036] In addition, the stirring part is arranged at an eccentric position. The eccentric design can break the symmetrical flow pattern and produce uneven flow and turbulence, which can effectively promote the rapid mixing of liquids of different concentrations and temperatures.

[0037] The reverse stirring mechanism 5 includes a connecting rod 51, one end of which is fixedly connected to the bottom of the inner wall of the tank body 1, and the other end of the connecting rod 51 is rotatably connected to a lower gear ring member 53. The outer wall of the connecting rod 51 is rotatably connected to a transmission gear 52, including an upper gear ring member 54 rotatably connected to the outer wall of the connecting rod 51, the top of the upper gear ring member 54 is fixedly connected to an impeller 55, an annular gear ring is provided on the top of the lower gear ring member 53, the outer wall of the transmission gear 52 is meshed with the annular gear ring of the lower gear ring member 53, an annular gear ring is provided on the bottom of the upper gear ring member 54, and the annular gear ring at the bottom of the upper gear ring member 54 is meshed with the transmission gear 52, thereby playing a transmission role and realizing power transmission. The main shaft 44 drives the lower gear ring 53 to rotate, the lower gear ring 53 drives the transmission gear 52 to rotate, the transmission gear 52 drives the upper gear ring 54 to rotate in the opposite direction of the lower gear ring 53, the upper gear ring 54 drives the impeller 55 to rotate, the impeller 55 drives the liquid at the top to flow to the eccentric stirring mechanism 4 at the bottom, thereby increasing the upper and lower exchange of the liquid, enhancing the mixing and homogeneity of the liquid, promoting the effective combination of liquids of different temperatures and concentrations, preventing the occurrence of stratification, and improving the solute dissolution rate during the crystallization process, ensuring the uniformity and quality of the product. In addition, this upper and lower liquid exchange can also improve the heat exchange efficiency, ensure the uniform distribution of temperature in the system, and thus optimize the overall crystallization effect.

[0038] The inner wall scraping mechanism 6 includes a gear plate 61, which is fixedly connected to the outer wall of the main shaft 44. The bottom of the inner wall of the tank body 1 is rotatably connected to an intermediate gear 62, and the bottom of the inner wall of the tank body 1 is rotatably connected to a bottom gear ring 63. The top of the bottom gear ring 63 is rotatably connected to a wiper 64, and the top of the wiper 64 is fixedly connected to a top gear 65. The top of the tank body 1 is fixedly connected to a top gear ring 66. The outer wall of the gear plate 61 is meshed with the intermediate gear 62, and an inner gear ring is provided on the inner wall of the bottom gear ring 63, so that the inner gear ring of the bottom gear ring 63 is meshed with the intermediate gear 62 for transmission, and the top gear ring 66 is fixedly connected to the top of the tank body 1. An inner gear ring is provided on the inner wall of the top gear ring 66, so that the inner gear ring of the top gear ring 66 is meshed with the top gear 65, the main shaft 44 drives the gear plate 61 to rotate, and the gear plate 61 drives the bottom gear ring 63 to rotate in the opposite direction of the main shaft 44 through the intermediate gear 62, and the bottom gear ring 63 drives the wiper 64 to rotate in the opposite direction of the main shaft 44. At this time, the wiper 64 rotates in the opposite direction to the eccentric stirring mechanism 4, forming a convection in the opposite direction to the eccentric stirring mechanism 4. This convection helps to break the static layer of the liquid, improve the fluidity of the liquid, and further enhance the mixing effect.

[0039] And the wiping piece 64 wipes the inner wall of the tank body 1. The role of the wiping piece 64 in wiping the inner wall of the tank body 1 is mainly reflected in improving the homogenization effect. First, wiping can remove the sediment and crystals on the inner wall to prevent these residues from affecting the mixing of the liquid, avoid the occurrence of local oversaturation or undersaturation, and ensure that the liquid state in the entire tank body is uniform. In addition, the wiping piece can promote the circulation of the liquid during movement, thereby further improving the mixing efficiency, ensuring the consistency of temperature and concentration, and ultimately optimizing the crystallization process and improving the quality and consistency of the product.

[0040] Furthermore, the top gear 65 at the top of the wiping piece 64 is meshed with the top gear ring 66, causing the top gear 65 to rotate while rotating, and the top gear 65 drives the wiping piece 64 to rotate while rotating. This design enables the wiping piece 64 to not only move linearly when wiping the inner wall of the tank body 1, but also rotate by itself, thereby achieving a more comprehensive cleaning effect. First, the self-rotation can ensure that the wiping piece covers a wider area when contacting the inner wall, effectively removing residues and sediments on the inner wall, and improving the cleaning efficiency. In addition, the self-rotation motion can also enhance the interaction between the wiping piece 64 and the liquid, promote the flow of the liquid, further improve the homogenization effect, and ensure that the liquid state remains uniform during the crystallization process, thereby further optimizing the quality and purity of the final product.

[0041] In summary, when the itaconic acid concentration and crystallization device is used, the lid 2 on the top of the tank body 1 is opened, the raw materials to be concentrated and crystallized are poured into the tank body 1, and then the driving motor 41 is turned on. The driving motor 41 drives the intermittent gear 42 to rotate, and the toothed part of the intermittent gear 42 drives the planetary gear 43 to rotate when it meshes with the planetary gear 43. When the toothless part of the intermittent gear 42 rotates to one side of the planetary gear 43, the planetary gear 43 is no longer driven, and the planetary gear 43 drives the main shaft 44 to rotate when it rotates. The main shaft 44 drives the first rotating plate 45, the second rotating plate 46, and the connecting block 47 to rotate. Under the action of centrifugal force, the connecting block 47 drives the spring 48 to stretch. At this time, the first rotating plate 45 and the second rotating plate 46 rotate relatively to a larger intersection angle, and the connecting block 4 7 moves in the direction away from the main shaft 44. When the planetary gear 43 stops rotating, the spring 48 drives the connecting block 47 to return, so that the first rotating plate 45 and the second rotating plate 46 rotate relative to each other to a smaller intersection angle, so that the first rotating plate 45, the second rotating plate 46 and the connecting block 47 rotate and reciprocate during the stirring process, thereby achieving efficient mixing and homogenization of the liquid. The reciprocating motion can break the laminar state of the liquid, enhance the flow between liquids of different temperatures and concentrations, promote the uniform precipitation of crystals, and avoid local oversaturation or undersaturation. In addition, this motion can also improve the heat exchange efficiency and ensure the uniform distribution of temperature during the crystallization process, thereby optimizing the quality of the product and improving the crystallization efficiency, and improving the working performance and production efficiency of the equipment as a whole.

[0042] And the stirring part is located at an eccentric position. The eccentric design can break the symmetrical flow pattern and produce uneven flow and turbulence, which can effectively promote the rapid mixing of liquids of different concentrations and temperatures and reduce local oversaturation or undersaturation. In addition, the eccentric position can also improve the power efficiency of the stirring mechanism, because the eccentric design makes the flow path generated by the stirring blade during movement more complex, increases the turbulent intensity of the liquid, thereby improving the overall mixing efficiency, ensuring the uniform distribution of the liquid in the tank body, optimizing heat exchange, and improving the overall efficiency of the crystallization process, thereby improving the quality and consistency of the product.

[0043] At this time, the main shaft 44 drives the lower gear ring 53 to rotate, the lower gear ring 53 drives the transmission gear 52 to rotate, the transmission gear 52 drives the upper gear ring 54 to rotate in the opposite direction of the lower gear ring 53, the upper gear ring 54 drives the impeller 55 to rotate, and the impeller 55 drives the liquid at the top to flow to the eccentric stirring mechanism 4 at the bottom, thereby increasing the upper and lower exchange of the liquid, enhancing the mixing and homogeneity of the liquid, promoting the effective combination of liquids of different temperatures and concentrations, preventing the occurrence of stratification, and improving the solute dissolution rate during the crystallization process, ensuring the uniformity and quality of the product. In addition, this upper and lower liquid exchange can also improve the heat exchange efficiency, ensure the uniform distribution of temperature in the system, and thus optimize the overall crystallization effect.

[0044] At the same time, the main shaft 44 drives the gear plate 61 to rotate, and the gear plate 61 drives the bottom gear ring 63 to rotate in the opposite direction of the main shaft 44 through the intermediate gear 62. The bottom gear ring 63 drives the wiper 64 to rotate in the opposite direction of the main shaft 44. At this time, the wiper 64 rotates in the opposite direction to the eccentric stirring mechanism 4, forming a convection in the opposite direction to the eccentric stirring mechanism 4. This convection helps to break the static layer of the liquid, improve the fluidity of the liquid, and further enhance the mixing effect.

[0045] And the wiping piece 64 wipes the inner wall of the tank body 1. The role of the wiping piece 64 in wiping the inner wall of the tank body 1 is mainly reflected in improving the homogenization effect. First, wiping can remove the sediment and crystals on the inner wall to prevent these residues from affecting the mixing of the liquid, avoid the occurrence of local oversaturation or undersaturation, and ensure that the liquid state in the entire tank body is uniform. In addition, the wiping piece can promote the circulation of the liquid during movement, thereby further improving the mixing efficiency, ensuring the consistency of temperature and concentration, and ultimately optimizing the crystallization process and improving the quality and consistency of the product.

[0046] Furthermore, the top gear 65 at the top of the wiping piece 64 is meshed with the top gear ring 66, causing the top gear 65 to rotate while rotating, and the top gear 65 drives the wiping piece 64 to rotate while rotating. This design enables the wiping piece 64 to not only move linearly when wiping the inner wall of the tank body 1, but also rotate by itself, thereby achieving a more comprehensive cleaning effect. First, the self-rotation can ensure that the wiping piece covers a wider area when contacting the inner wall, effectively removing residues and sediments on the inner wall, and improving the cleaning efficiency. In addition, the self-rotation motion can also enhance the interaction between the wiping piece 64 and the liquid, promote the flow of the liquid, further improve the homogenization effect, and ensure that the liquid state remains uniform during the crystallization process, thereby further optimizing the quality and purity of the final product.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. An itaconic acid concentration and crystallization device, comprising a tank body (1), characterized in that: The top of the tank body (1) is provided with a lid (2), the bottom of the tank body (1) is provided with a discharge pipe (3), the tank body (1) is provided with an eccentric stirring mechanism (4), the inner wall of the tank body (1) is provided with a reverse stirring mechanism (5), and the inner wall of the tank body (1) is provided with an inner wall scraping mechanism (6); The eccentric stirring mechanism (4) is used to stir the liquid in the tank body (1) to homogenize it, the reverse stirring mechanism (5) is used to exchange the liquid in the upper and lower layers of the liquid in the tank body (1), and the inner wall scraping mechanism (6) is used to scrape the inner wall of the tank body (1).

2. The itaconic acid concentration and crystallization device according to claim 1, characterized in that: The eccentric stirring mechanism (4) comprises a driving motor (41), wherein the driving motor (41) is fixedly connected to the bottom of the tank body (1), the output shaft of the driving motor (41) is fixedly connected to an intermittent gear (42), the bottom of the tank body (1) is rotatably connected to a planetary gear (43), the top of the planetary gear (43) is fixedly connected to a main shaft (44), the outer wall of the main shaft (44) is hinged to one end of a first rotating plate (45), the other end of the first rotating plate (45) is hinged to one end of a second rotating plate (46), the other end of the second rotating plate (46) is hinged to a connecting block (47), the outer wall of the connecting block (47) is fixedly connected to one end of a spring (48), and the other end of the spring (48) is fixedly connected to the outer wall of the main shaft (44).

3. The itaconic acid concentration and crystallization device according to claim 2, characterized in that: The surface portion of the intermittent gear (42) has no teeth, and the first rotating plate (45) and the second rotating plate (46) are arranged in two groups, and the two groups of the first rotating plate (45) and the second rotating plate (46) are arranged symmetrically.

4. The itaconic acid concentration and crystallization device according to claim 2, characterized in that: The main shaft (44) is eccentrically arranged, and the outer wall of the main shaft (44) is rotatably connected to the inner wall of the tank body (1).

5. The itaconic acid concentration and crystallization device according to claim 2, characterized in that: The reverse stirring mechanism (5) comprises a connecting rod (51), one end of which is fixedly connected to the bottom of the inner wall of the tank body (1), the other end of which is rotatably connected to a lower gear ring (53), the outer wall of which is rotatably connected to a transmission gear (52), the outer wall of which is rotatably connected to an upper gear ring (54), and the top of which is fixedly connected to an impeller (55).

6. The itaconic acid concentration and crystallization device according to claim 5, characterized in that: An annular gear ring is provided on the top of the lower gear ring member (53), and the outer wall of the transmission gear (52) is meshed with the annular gear ring of the lower gear ring member (53).

7. The itaconic acid concentration and crystallization device according to claim 6, characterized in that: An annular gear ring is provided at the bottom of the upper gear ring member (54), and the annular gear ring at the bottom of the upper gear ring member (54) is meshed with the transmission gear (52).

8. The itaconic acid concentration and crystallization device according to claim 5, characterized in that: The inner wall scraping mechanism (6) comprises a gear plate (61), wherein the gear plate (61) is fixedly connected to the outer wall of the main shaft (44); the bottom of the inner wall of the tank body (1) is rotatably connected to an intermediate gear (62); the bottom of the inner wall of the tank body (1) is rotatably connected to a bottom gear ring (63); the top of the bottom gear ring (63) is rotatably connected to a wiper (64); the top of the wiper (64) is fixedly connected to a top gear (65); and the top of the tank body (1) is fixedly connected to a top gear ring (66).

9. The itaconic acid concentration and crystallization device according to claim 8, characterized in that: The outer wall of the gear plate (61) is meshed with the intermediate gear (62), the inner wall of the bottom gear ring (63) is provided with an inner gear ring, and the inner wall of the top gear ring (66) is provided with an inner gear ring.

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