A cooling crystallization tank device for sugar production

Abstract

The application relates to a cooling crystallization tank device for sugar production applied to the technical field of sugar production, through the arrangement of a double-circle cooling unit with double-end synchronous water inlet and outlet, water inlet and water outlet of the double-circle cooling unit are used to neutralize each other, thereby effectively improving the temperature distribution uniformity on both sides of the double-circle cooling unit, the uniformity of sugar liquid cooling in the tank body is higher, the temperature fluctuation range is effectively reduced, compared with the prior art, sugar crystal grains can better and uniformly grow, and the crystallization effect is better; in addition, the arrangement of the diameter expansion assembly and the pipe stirring rotating plate can effectively improve the distribution range of cooling water in the sugar liquid, when the pipe stirring rotating plate rotates with the stirring rod, the diameter expansion assembly can be effectively driven to swing, the distribution range of the cooling water in the sugar liquid is further improved, the uniformity of the overall sugar liquid cooling is further improved, and the stability of the crystallization process is effectively ensured.

Description

Technical Field

[0001] This invention relates to a cooling crystallizer apparatus for sugar production, and more particularly to a cooling crystallizer apparatus for sugar production applied in the field of sugar production-related technologies. Background Technology

[0002] The key to sugar boiling is controlling the supersaturation coefficient of the sugar solution. This balances the rate at which sucrose molecules precipitate from the solution with the rate of crystal growth, allowing for orderly crystal growth. The supersaturation coefficient is related to factors such as the temperature, concentration, and purity of the sugar solution. Under certain concentration and purity conditions, boiling sugar by lowering the temperature of the solution through cooling, thus achieving supersaturation, is called cooling crystallization boiling.

[0003] During the cooling crystallization and starter culture process, the sugar solution is first heated under low vacuum conditions to evaporate the water and gradually increase its concentration until saturation. Then, the temperature of the sugar paste is rapidly reduced to induce supersaturation. Once the supersaturation coefficient reaches the metastable region, the temperature is slightly increased to maintain it at approximately 64°C before adding the alcoholic sugar paste. After a period of stabilization to allow the crystal surfaces to further self-repair, the temperature is then slowly reduced again, ensuring the supersaturation coefficient remains within the metastable region. During normal cooling, the sugar solution temperature must be reduced slowly and without drastic fluctuations.

[0004] However, in the existing technology, when cooling the sugar solution with circulating water, there is a large temperature difference between the inlet and outlet of the circulating water. This results in the sugar solution temperature being lower near the inlet and higher near the outlet, leading to poor uniformity in cooling the sugar solution and affecting the uniform and stable crystallization process. Summary of the Invention

[0005] The technical problem that this invention aims to solve in view of the above-mentioned prior art is that when using circulating water for cooling, the cooling uniformity of the internal sugar solution is poor, which will affect the stability and uniformity of crystallization.

[0006] To address the aforementioned problems, this invention provides a cooling crystallization tank device for sugar refining, comprising a tank body, a stirring rod disposed within the tank body, a motor mounted on the top of the tank body, the motor and the stirring rod being connected via a conveyor belt, a support fixedly connected to the bottom of the tank body, the bottom of the stirring rod being rotatably connected to the support, a discharge port fixedly connected to the bottom of the tank body, a feed port fixedly connected to the left end of the tank body, two steam ports fixedly connected to the upper end of the tank body, and a double-coil cooling unit disposed inside the tank body, the double-coil cooling unit comprising an outer coil and an inner coil located inside the outer coil. An upper liquid guide pipe is fixedly connected to the upper end of the outer coil and the inner coil, and a lower liquid guide pipe is fixedly connected to the lower end of the outer coil and the inner coil. Both the upper liquid guide pipe and the lower liquid guide pipe are fixedly connected through the tank body and extend to the outside of the tank body. Multiple stirring blades are fixedly connected to the middle of the stirring rod. The stirring blades include a fixed sleeve fixedly connected to the stirring rod and multiple inclined plates fixedly connected to the outer end of the fixed sleeve and having mounting holes. Liners are fixedly connected between the left and right outer ends of the inclined plates and the fixed sleeve. Multiple evenly distributed expansion components are fixedly connected to the inner ring of the inner coil. Both the upper and lower liquid guide tubes are fixedly connected to an L-shaped baffle plate, which divides the interior of the upper or lower liquid guide tube into two independent flow chambers. The openings of the upper and lower liquid guide tubes are fixedly connected to end caps, and the outer end of the end caps is fixedly connected to an outer liquid tube and an inner liquid tube. The outer liquid tube and the inner liquid tube are respectively connected to the two corresponding flow chambers.

[0007] In the aforementioned cooling crystallization tank device for sugar production, the double-circle cooling unit with simultaneous water inlet and outlet at both ends effectively ensures the uniformity of cooling of the sugar solution in the tank and reduces the temperature fluctuation range. Compared with the existing technology, it effectively ensures the stable and uniform growth of sugar crystals, resulting in better crystallization effect.

[0008] As a further improvement of this application, the inclined plate and the corresponding two backing plates are in a cross shape, the inclined plate is inclined, and the acute angle between the inclined plate and the vertical plane does not exceed 45°.

[0009] As a further improvement of this application, the short arm end of the L-shaped baffle is located between the outer coil and the inner coil. Of the two outer liquid pipes on the upper and lower liquid pipes, one serves as the liquid inlet of the outer coil and the other serves as the liquid outlet of the outer coil; of the two inner liquid pipes, one serves as the liquid inlet of the inner coil and the other serves as the liquid outlet of the inner coil.

[0010] As a further improvement of this application, the expansion assembly includes an expansion bend tube fixed to and communicating with the inner coil and an isolation plate fixedly connected inside the inner coil. The isolation plate is located in the middle of the corresponding expansion bend tube, and both arms of the isolation plate are connected to the inner coil.

[0011] As a further improvement to this application, both the outer and inner coils are rigid structures, and the expansion bend is a V-shaped hollow structure.

[0012] As another improvement of this application, the liquid diffusing baffle is a V-shaped elastic hollow structure, and a magnetic head is fixedly connected to the middle part of the liquid diffusing baffle away from the isolation plate. The magnetic head is made of ferromagnetic material.

[0013] As a further improvement to this application, among the multiple stirring blades, the outer ends of multiple inclined plates located in the same vertical direction are equipped with a deflector plate through mounting holes. The deflector plate includes multiple double-arm connecting plates that are respectively bolted to the multiple inclined plates and liquid-deflecting plates fixedly connected to the outer ends of the multiple double-arm connecting plates.

[0014] As a further improvement to this application, the liquid-dispensing pads are made of magnetic material, and there is a magnetic attraction between the liquid-dispensing pads and the magnetic head. The multiple liquid-dispensing pads do not contact the magnetic head, and the endpoints of the two ends of the liquid-dispensing pads are symmetrical about the center of the midpoint of the liquid-dispensing pads.

[0015] In summary, the dual-ring cooling unit with synchronized water inlet and outlet at both ends ensures that the temperature of the sugar solution near the inlet and outlet of the dual-ring cooling unit is neutralized by the water inlet and outlet, thereby effectively improving the uniformity of temperature distribution on both sides of the dual-ring cooling unit. This results in higher uniformity of cooling of the sugar solution in the tank, effectively reducing temperature fluctuations. Compared with existing technologies, this effectively ensures the stable and uniform growth of sugar crystals, leading to better crystallization. In addition, the combination of the diameter expansion component and the rotating plate effectively increases the distribution range of cooling water in the sugar solution. Furthermore, the rotating plate, when rotating with the stirring rod, effectively drives the diameter expansion component to swing, further increasing the distribution range of cooling water in the sugar solution. This further improves the overall uniformity of cooling of the sugar solution and effectively ensures the stability of the crystallization process. Attached Figure Description

[0016] Figure 1 This is a front cross-sectional view of the first embodiment of this application; Figure 2 This is a perspective view of the stirring rod according to the first embodiment of this application; Figure 3 This is a partial perspective view of the dual-circle cooling unit according to the first embodiment of this application; Figure 4 This is a top view schematic diagram of the dual-circuit cooling unit according to the first embodiment of this application; Figure 5 This is a schematic diagram of the flow of cooling water at the upper liquid guide pipe in the first embodiment of this application; Figure 6 This is a partial perspective view of the dual-circle cooling unit according to the second embodiment of this application; Figure 7 This is a top view of the stirring rod after the upper rotating plate is installed in the second embodiment of this application; Figure 8This is a cross-sectional view of the diameter expansion component portion according to the second embodiment of this application; Figure 9 This is a three-dimensional schematic diagram of the stirring rod after the upper rotating plate is installed in the second embodiment of this application. Figure 10 This is a top view schematic diagram of the second embodiment of this application, showing the oscillation of the expansion tube driven by the rotating plate.

[0017] The following are the labels in the diagram: 1 Tank body, 101 Support, 11 Inlet, 12 Discharge port, 13 Steam port, 2 Motor, 3 Stirring rod, 31 Fixing sleeve, 32 Inclined plate, 33 Liner, 4 Double-ring cooling unit, 401 Upper liquid guide pipe, 402 Lower liquid guide pipe, 403 L-shaped baffle, 41 Outer coil, 42 Inner coil, 51 Outer liquid pipe, 52 Inner liquid pipe, 6 Expansion assembly, 61 Expansion baffle, 62 Isolation plate, 63 Magnetic head, 71 Double-arm connecting plate, 72 Liquid-pulling plate. Detailed Implementation

[0018] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0019] First implementation method: Figure 1 A cooling crystallization tank device for sugar production is shown, including a tank body 1, a stirring rod 3 inside the tank body 1, a motor 2 installed on the top of the tank body 1, the motor 2 and the stirring rod 3 being connected by a conveyor belt, a bracket 101 fixedly connected to the bottom of the tank body 1, the bottom of the stirring rod 3 being rotatably connected to the bracket 101, a discharge port 12 fixedly connected to the bottom of the tank body 1, a feed port 11 fixedly connected to the left end of the tank body 1, and two steam ports 13 fixedly connected to the upper end of the tank body 1, one for introducing steam to facilitate heating the sugar solution, and the other for venting steam to balance the gas pressure inside the tank body 1 when steam is introduced. A double-ring cooling unit 4 is provided inside the tank body 1.

[0020] like Figure 2Multiple stirring blades are fixedly connected to the middle of the stirring rod 3. The stirring blades include a fixed sleeve 31 fixedly connected to the stirring rod 3 and multiple inclined plates 32 fixedly connected to the outer end of the fixed sleeve 31 with mounting holes. Liners 33 are fixedly connected between the left and right outer ends of the inclined plates 32 and the fixed sleeve 31. During the cooling and crystallization process, the motor 2 can drive the stirring rod 3 to rotate, thereby stirring the sugar liquid, facilitating heat exchange between the sugar liquids, making the cooling of the sugar liquid by the double-ring cooling unit 4 more stable, and effectively ensuring the stable crystallization of the sugar liquid. The inclined plates 32 and the corresponding two liners 33 are in a cross shape. The liners 33 are mainly used for support, making the connection between the inclined plates 32 and the fixed sleeve 31 more stable. The inclined plates 32 are inclined, and the acute angle between the inclined plates 32 and the vertical plane does not exceed 45°, so that when the stirring rod 3 rotates, it can stir the nearby sugar liquid, making the sugar liquid dynamic, facilitating the continuous redistribution of the sugar liquid position, making the heat distribution relatively uniform during cooling, and preventing local overheating or underheating.

[0021] like Figures 3-4 The dual-coil cooling unit 4 includes an outer coil 41, an inner coil 42 located inside the outer coil 41, an upper liquid guide pipe 401 fixedly connected to the upper ends of the outer coil 41 and the inner coil 42, and a lower liquid guide pipe 402 fixedly connected to the lower ends of the outer coil 41 and the inner coil 42. Both the outer coil 41 and the inner coil 42 are rigid structures. The upper liquid guide pipe 401 and the lower liquid guide pipe 402 are both fixedly connected through the tank body 1 and extend to the outside of the tank body 1. Multiple evenly distributed expansion components 6 are fixedly connected to the inner coil 42. Each expansion component 6 includes a liquid expansion bend pipe 61 fixed to and communicating with the inner coil, and an isolation plate 62 fixedly connected inside the inner coil 42. The isolation plate 62 is located in the middle of the corresponding liquid expansion bend pipe 61, so that when the coolant reaches the isolation plate 62, it needs to detour through the liquid expansion bend pipe 61 to return to the inner coil 42. The internal movement of the cooling water increases its path and contact area with the sugar solution. The expansion tube 61 has a V-shaped hollow structure, and both arms of the partition plate 62 are connected to the inner coil 42. Since the inner coil 42 is located in the inner circle, its inner diameter is smaller than that of the outer coil 41, resulting in a shorter overall path for the cooling water entering the inner coil 42 compared to the outer coil 41. By setting the expansion component 6, the path of the cooling water entering the inner coil 42 can be effectively extended, making the path of the cooling water in the outer coil 41 and the inner coil 42 more consistent or reducing the path difference. This effectively ensures the utilization rate of the cooling water in the inner coil 42 and makes the temperature difference between the inlet and outlet of the cooling water smaller and more stable. In addition, the expansion component 6 also increases the distribution range of the cooling water in the sugar solution, further improving the uniformity of cooling of the sugar solution.

[0022] like Figure 5In the diagram, the dashed arrows indicate the inlet of cooling water, and the straight arrows indicate the outlet of cooling water. Both the upper guide pipe 401 and the lower guide pipe 402 are fixedly connected to an L-shaped baffle 403. The L-shaped baffle 403 divides the interior of either the upper guide pipe 401 or the lower guide pipe 402 into two independent flow chambers. End caps are fixedly connected to the openings of both the upper guide pipe 401 and the lower guide pipe 402. An outer liquid pipe 51 and an inner liquid pipe 52 are fixedly connected to the outer end of the end caps. The outer liquid pipe 51 and the inner liquid pipe 52 are respectively connected to the two corresponding flow chambers. The short arm of the L-shaped baffle 403 is located between the outer coil 41 and the inner coil 42. Of the two outer liquid pipes 51 on the upper guide pipe 401 and the lower guide pipe 402, one serves as the inlet of the outer coil 41, and the other... The outer coil 41 serves as the drain outlet; of the two inner coils 52, one serves as the inlet and the other as the outlet, allowing the outer coil 41 and inner coil 42 to be separated and independent. This arrangement, along with the outer and inner coils 52, allows for independent water inflow and outflow. For the sugar solution near the top of the tank 1, it comes into contact with both the newly introduced, lower-temperature cooling water and the soon-to-be-discharged, higher-temperature cooling water. This slows down the cooling rate, stabilizing crystallization. Simultaneously, the stirring of the stirring rod 3 helps to neutralize the heat distribution of the sugar solution around the outer and inner coils 41 and 42, preventing excessive temperature differences between the upper and lower sugar solutions and further improving the crystallization stability of the sugar solution.

[0023] In the aforementioned cooling crystallization tank device for sugar production, the double-ring cooling unit 4, with simultaneous water inlet and outlet at both ends, allows for simultaneous water inlet and outlet at both ends during cooling. This simultaneous inlet and outlet at the same end effectively neutralizes the temperature difference between the two ends in the prior art, thereby ensuring the uniformity of sugar solution cooling within the tank 1 and effectively reducing the temperature fluctuation of the sugar solution. Compared to the prior art, this effectively ensures the stable and uniform growth of sugar crystals, resulting in better crystallization. Simultaneously, under the action of the diameter expansion component 6, on the one hand, the path of cooling water in the inner coil 42 with a smaller inner diameter can be effectively extended, reducing the time difference between the cooling water in the outer coil 41 and the inner coil 42 on the sugar solution, thereby further improving the uniformity of cooling the sugar solution. On the other hand, the diameter expansion component 6 can expand the distribution range of cooling water entering the inner coil 42 within the sugar solution, making the heat distribution of the sugar solution relatively uniform during cooling and improving crystallization stability.

[0024] Second implementation method: This embodiment adds a tube-turning plate and a magnetic head 63 to the first embodiment, while the rest remains the same as the first embodiment.

[0025] like Figure 8The liquid expansion tube 61 is a V-shaped elastic hollow structure. A magnetic head 63 is fixedly connected to the middle part of the liquid expansion tube 61 away from the isolation plate 62. The magnetic head 63 is made of ferromagnetic material.

[0026] Figure 6 , Figure 7 and Figure 9 As shown, among the multiple stirring blades, the outer ends of multiple inclined plates 32 located in the same vertical direction are equipped with a deflector plate through mounting holes. The deflector plate includes multiple double-arm connecting plates 71 respectively bolted to the multiple inclined plates 32, and liquid-dispensing plates 72 fixedly connected to the outer ends of the multiple double-arm connecting plates 71. The liquid-dispensing plates 72 are made of magnetic material, and there is a magnetic attraction between the liquid-dispensing plates 72 and the magnetic head 63, such as... Figure 10 The arrows in the diagram indicate the swing range of the expansion component 6. When the rotating plate rotates with the stirring rod 3, it effectively drives the expansion component 6 to swing, further improving the distribution range of cooling water in the sugar solution. Simultaneously, it further improves the uniformity of the overall cooling of the sugar solution, effectively ensuring the stability of the crystallization process. The multiple dispensing plates 72 do not contact the magnetic head 63, and the endpoints of both ends of the dispensing plates 72 are symmetrical about the center of the midpoint of the dispensing plate 72. This means that the two ends of the dispensing plates 72 are located on two concentric circles with different radii. When the dispensing plate 72 rotates with the stirring rod 3, its arc surface can cut into the sugar solution, thus improving the dispensing effect and redistribution of the sugar solution, facilitating stable crystallization. In light of current practical needs, the above-described embodiments adopted in this application are not limited to these specific embodiments. Various changes made within the scope of knowledge possessed by those skilled in the art, without departing from the concept of this application, still fall within the protection scope of this invention.

Claims

1. A cooling crystallization tank apparatus for sugar refining, characterized in that: The system includes a tank (1), a stirring rod (3) inside the tank (1), a motor (2) installed on the top of the tank (1), the motor (2) and the stirring rod (3) being connected by a conveyor belt, a bracket (101) fixedly connected to the bottom of the tank (1), the bottom of the stirring rod (3) being rotatably connected to the bracket (101), a discharge port (12) fixedly connected to the bottom of the tank (1), a feed port (11) fixedly connected to the left end of the tank (1), two steam ports (13) fixedly connected to the upper end of the tank (1), and a double-circle cooling unit (4) inside the tank (1). The double-circle cooling unit (4) includes an outer coil (41), an inner coil (42) located inside the outer coil (41), and a coil fixedly connected to the outer coil. (41) and the upper liquid guide pipe (401) at the upper end of the inner coil (42) and the lower liquid guide pipe (402) fixedly connected to the lower end of the outer coil (41) and the inner coil (42), the upper liquid guide pipe (401) and the lower liquid guide pipe (402) are both fixedly connected through the tank (1) and extend to the outside of the tank (1), the stirring rod (3) is fixedly connected with multiple stirring blades in the middle, the stirring blades include a fixed sleeve (31) fixedly connected to the stirring rod (3) and multiple inclined plates (32) fixedly connected to the outer end of the fixed sleeve (31) and having mounting holes, the left and right outer ends of the inclined plates (32) are fixedly connected with liner plates (33) between the fixed sleeve (31), and the inner ring of the inner coil (42) is fixedly connected with multiple evenly distributed expansion components (6); Both the upper liquid guide tube (401) and the lower liquid guide tube (402) are fixedly connected to an L-shaped baffle (403). The L-shaped baffle (403) divides the upper liquid guide tube (401) and the lower liquid guide tube (402) into two independent flow chambers. The openings of the upper liquid guide tube (401) and the lower liquid guide tube (402) are fixedly connected to end caps. The outer end of the end cap is fixedly connected to an outer liquid tube (51) and an inner liquid tube (52). The outer liquid tube (51) and the inner liquid tube (52) are respectively connected to the two corresponding flow chambers. The expansion assembly (6) includes a dilution tube (61) fixed to and communicating with the inner coil and an isolation plate (62) fixedly connected inside the inner coil (42). The isolation plate (62) is located in the middle of the dilution tube (61), and both ends of the dilution tube (61) are connected to the inner coil (42), so that when the coolant reaches the isolation plate (62), it needs to detour through the dilution tube (61) to return to the inner coil (42) and continue moving. The outer coil (41) and the inner coil (42) are both rigid structures. The dilution tube (61) is a V-shaped elastic hollow structure. A magnetic drive is fixedly connected to the middle of the dilution tube (61) away from the isolation plate (62). The head (63) is made of ferromagnetic material. Among the multiple stirring blades, the outer ends of multiple inclined plates (32) located in the same vertical direction are equipped with a tube-pulling plate through mounting holes. The tube-pulling plate includes multiple double-arm connecting plates (71) that are respectively connected to multiple inclined plates (32) by bolts and liquid-pulling plates (72) that are fixedly connected to the outer ends of multiple double-arm connecting plates (71). The liquid-pulling plates (72) are made of magnetic material, and there is a magnetic attraction between the liquid-pulling plates (72) and the magnetic head (63). The multiple liquid-pulling plates (72) do not contact the magnetic head (63), and the endpoints of the two ends of the liquid-pulling plates (72) are symmetrical about the center of the midpoint of the liquid-pulling plates (72).

2. The cooling crystallization tank apparatus for sugar refining according to claim 1, characterized in that: The inclined plate (32) and the corresponding two lining plates (33) are in a cross shape. The inclined plate (32) is inclined and the acute angle between the inclined plate (32) and the vertical plane does not exceed 45°.

3. The cooling crystallization tank apparatus for sugar refining according to claim 1, characterized in that: The short arm end of the L-shaped baffle (403) is located between the outer coil (41) and the inner coil (42). Of the two outer liquid pipes (51) on the upper liquid guide pipe (401) and the lower liquid guide pipe (402), one serves as the liquid inlet of the outer coil (41) and the other serves as the liquid outlet of the outer coil (41). Of the two inner liquid pipes (52), one serves as the liquid inlet of the inner coil (42) and the other serves as the liquid outlet of the inner coil (42).

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