Central tube single-column linear lifting series vertical cooling crystallizer

Abstract

This invention belongs to the field of sugar alcohol cooling crystallization technology, specifically a vertical cooling crystallizer with a central tube single column linear lifting series connection. Addressing the problems of low production capacity, low yield, poor crystal formation, and high energy consumption in existing products, the following solution is proposed: It includes a crystallizer cylinder and a cooling crystallization coil inside the crystallizer cylinder. A central tube single column is slidably connected inside the crystallizer cylinder, and the surface of the central tube single column is welded to the center of the cooling crystallization coil. A cooling circulating water pipeline is provided inside the cooling circulating water pipeline, with its inlet and outlet connected to the inlet and outlet of the cooling crystallization coil, respectively. A cover plate is bolted to the top of the crystallizer cylinder. The central tube single column linear lifting series connection technology adopted in this invention makes the arrangement structure of the cooling crystallization coil more scientific, significantly improving the phenomenon of wall adhesion and agglomeration at abrupt sharp corners during material crystallization.

Description

Technical Field

[0001] This invention relates to the field of sugar alcohol cooling crystallization technology, and in particular to a vertical cooling crystallizer with a central tube single column linear lifting series connection. Background Technology

[0002] Patent application number 201010135064.4 discloses a continuous crystallization process for sugar alcohols and a vertical continuous crystallizer. The shell is a vertical cylindrical container with a feed valve at the bottom and a discharge valve on the upper side. Multiple cooling coils are installed inside the shell, each connected to a cooling medium distribution pipe, forming multiple individual crystallizers connected sequentially from top to bottom. The crystallizer is connected to a multi-functional lifting pipe, and the hydraulic lifting device includes a rigid connecting frame, a hydraulic cylinder, and a hydraulic pump station. The production process includes: (1) concentration, (2) stirring, (3) cooling and crystal growth, (4) discharge, and (5) finished product; or a crystalline maltitol product with a purity of over 99.5% is obtained. The material flow direction in this continuous crystallization process is from bottom to top; this novel continuous crystallization process uses crystallization intervals with decreasing temperature gradients from top to bottom, thus ensuring the crystal size, crystal shape, and product quality. It solves the problem of discontinuous crystallization in sugar alcohol production, ensuring continuous production.

[0003] However, the continuous crystallization process and vertical continuous crystallizer of sugar alcohol also have some problems. At present, the industrial crystallizers for starch sugar or sugar alcohol mainly adopt horizontal crystallizers or multi-column riser vertical cooling crystallizers. The multi-column riser vertical cooling crystallizer has a complex structure and the riser occupies a large volume. Due to structural limitations, the arrangement of cooling crystallization coils can only adopt a polygonal arrangement to avoid too many riser tubes. The consequences of this structure are that the cross-sectional distribution density of cooling crystallization coils in this type of crystallizer is small, the short-circuit probability of material flow is high, there are many sealing points with the outside, and the ratio of crystallization volume to the total volume of the crystallizer is small. This results in low production capacity, low yield, poor crystal formation, and high energy consumption of the crystallized product, which greatly affects the production cost of crystallized starch sugar or crystallized sugar alcohol. In order to improve the crystallization volume utilization rate and production capacity of a single unit, improve crystallization quality, and reduce operating costs, it is urgent to develop a new type of vertical cooling crystallizer. Summary of the Invention

[0004] Based on the technical problems of low production capacity, low yield, poor crystal formation, and high energy consumption of the crystallized products in the background technology, this invention proposes a central tube single column linear lifting series vertical cooling crystallizer.

[0005] The present invention proposes a central tube single column linear lifting series vertical cooling crystallizer, which includes a crystallizer cylinder and a cooling crystallization coil inside the crystallizer cylinder. A central tube single column is slidably connected inside the crystallizer cylinder. The surface of the central tube single column is welded to the center of the cooling crystallization coil. A cooling circulating water pipeline is provided inside the cooling crystallization coil. The inlet and outlet of the cooling circulating water pipeline are respectively connected to the inlet and outlet of the cooling crystallization coil.

[0006] The top of the crystallizer cylinder is bolted to a cover plate. The top of the single-column central tube passes through the central hole at the top of the cover plate and is welded to a frame. Hydraulic lifting cylinders are bolted to both sides of the bottom of the frame, and the bottom of the hydraulic lifting cylinders is bolted to the top of the cover plate. A head is welded to the bottom of the crystallizer cylinder, and a stirring device is bolted to the bottom of the head. The single-column central tube linear lifting cooling crystallizer coil series technology used in this invention makes the arrangement of the cooling crystallizer coils more scientific, effectively solving the material short-circuiting problem of previous multi-column vertical cooling crystallizers. The distribution of the cooling crystallizer coils is more uniform, and the abrupt sharp angle defects formed by the linear arrangement are eliminated, significantly improving the wall-hanging and agglomeration phenomenon at the abrupt sharp angle positions during material crystallization. This structure significantly increases the effective cooling area per unit volume of the crystallizer, thereby increasing the cooling capacity of the equipment. The single-column central tube structure experiences single-point force, with the force point coinciding with the center of gravity of all cooling crystallizer coils on a central axis. This arrangement allows multiple liquid crystallizer coils to be cooled in series. The impact of the synchronous speed of the lifting cylinder on the verticality of the crystallizer cylinder is minimized. The horizontally placed cooling crystallization coil is welded to the central tube column through a perforated plate, and its inlet and outlet of circulating water are connected to the cooling circulating water pipeline set inside the central tube column. The entire structure formed by the cooling crystallization coil and the central tube column is placed inside the crystallizer cylinder. After the upper central tube column passes through the central hole set in the cover plate, it is welded to the upper multi-point radial frame. Multiple hydraulic lifting cylinders set on the upper part of the cover plate are connected to the frame to provide power, realize the linear motion of lifting or lowering the overall internal components to stir the crystallized material. The stirring device installed on the bottom end cap stirs the crystallized material to prevent the bottom material from clumping and keep the discharge smooth. The cooling circulating water pipeline uses a circulating pump to drive the cooling water flow, allowing the cooling water to circulate into the cooling circulating water pipeline. The cooling water inside the cooling circulating water pipeline enters the cooling crystallization coil, pouring the material into the crystallizer cylinder. The cooling crystallization coil cools and crystallizes the material inside the crystallizer cylinder.

[0007] Preferably, a central tube single column is provided inside the crystallizer cylinder, and cooling crystallization coils are stacked one on top of the other. The cooling crystallization coils, the central tube single column, and the cooling circulating water pipeline constitute a cooling assembly. The central tube single column can drive the cooling crystallization coils to move up and down, and the cooling water inside the cooling circulating water pipeline can enter and exit the cooling crystallization coils.

[0008] Preferably, the cooling crystallization coil includes an arc-shaped steel pipe section, a straight steel pipe section, and an elbow.

[0009] There are three arc-shaped steel pipe sections, two straight steel pipe sections, and two elbows. The three arc-shaped steel pipe sections are connected in series through two straight steel pipe sections. The arc-shaped steel pipe sections are connected to the straight steel pipe sections through elbows. Cooling water flows inside the arc-shaped steel pipe sections, straight steel pipe sections, and elbows. The distribution of cooling crystallization coils is more uniform, and the abrupt sharp corner defects formed by straight arrangement are eliminated. This significantly improves the phenomenon of material clumping at abrupt sharp corner positions during the crystallization process. This structure significantly increases the effective cooling area per unit volume of the crystallizer, thereby increasing the cooling capacity of the equipment.

[0010] Preferably, the arc-shaped steel pipe segment and the straight steel pipe segment are connected in series by an elbow, and adjacent arc-shaped steel pipe segments are connected in series by a straight steel pipe segment. The structure of the arc-shaped steel pipe segment and the straight steel pipe segment facilitates the flow of cooling water and facilitates the circulation of cooling water.

[0011] Preferably, the surface of the central tube column is welded with a perforated plate, and the surfaces of the arc-shaped steel pipe and the straight steel pipe are fixed to the perforated plate through notches in the perforated plate. The perforated plate fixes the arc-shaped steel pipe and the straight steel pipe, thereby enhancing the stability of the arc-shaped steel pipe and the straight steel pipe.

[0012] Preferably, the cooling crystallization coil is welded to the central tube column through a perforated plate, and the number of perforated plates is three. The three perforated plates can enhance the stability of the cooling crystallization coil.

[0013] Preferably, adjacent cooling crystallization coils are stacked in multiple layers through cooling circulating water pipes, and the layers are connected in series through cooling circulating water pipes to form a cooling crystallization coil unit. The stacking of cooling crystallization coils can increase the surface area of ​​the cooling crystallization coils, enhance the contact between the cooling crystallization coils and the materials, and facilitate the cooling and crystallization of the materials.

[0014] Preferably, a double-edged arc scraper is bolted to the surface of the cooling crystallization coil. When the double-edged arc scraper on the cooling crystallization coil moves up and down in a straight line, it can easily scrape off the material stuck on the inner wall of the crystallizer cylinder caused by the rapid heat dissipation from the outside of the crystallizer.

[0015] Preferably, the cooling crystallization coil is bolted to the side with a guide device, and the inner wall of the crystallizer cylinder is bolted to a cylinder guide rail. The surface of the cylinder guide rail is slidably connected to the inside of the guide device. Due to the newly designed guide device and cylinder guide rail, the linear up-and-down movement accuracy of the central tube column is guaranteed, and the phenomenon of internal component wall rubbing that is prone to occur in multi-column riser vertical cooling crystallizers, which can cause the entire crystallizer to stop, will not occur.

[0016] Preferably, the stirring device includes a stirring motor and a stirring frame. The top of the stirring motor is bolted to the bottom of the end cap. The output end of the stirring motor extends into the interior of the crystallizer cylinder and is keyed to the axis of the stirring frame. The power supply to the stirring motor is turned on. The stirring motor is controlled by a motor controller and can drive the stirring frame to rotate.

[0017] The beneficial effects of this invention are as follows: The central tube single-column linear lifting cooling crystallization coil series technology adopted in this invention makes the arrangement structure of the cooling crystallization coils more scientific, effectively solving the material short-circuiting problem of previous multi-column lifting vertical cooling crystallizers. The distribution of the cooling crystallization coils is more uniform, and the abrupt sharp angle defects formed by the linear arrangement are eliminated, significantly improving the wall-hanging and agglomeration phenomenon at the abrupt sharp angle position during material crystallization. This structure significantly increases the effective cooling area per unit volume of the crystallizer, thereby increasing the cooling capacity of the equipment. The force on the central tube single-column structure is a single-point force, and the force... The center of gravity of the point and all cooling crystallization coils coincide on a central axis. This arrangement minimizes the impact of the synchronous speed of multiple hydraulic lifting cylinders on the verticality of the crystallizer cylinder. Due to the newly designed guiding device and cylinder guide rail, the accuracy of the linear up-and-down movement of the central tube column is guaranteed. This prevents the phenomenon of internal parts rubbing against the wall, which is common in multi-column vertical cooling crystallizers, and thus avoids the shutdown of the entire crystallizer. The double-bladed arc scraper on the cylinder wall of the cooling crystallization coil easily scrapes off the material adhering to the inner wall of the crystallizer cylinder due to excessive heat dissipation from the outside of the crystallizer during its linear up-and-down movement. Attached Figure Description

[0018] Figure 1 This is a front view schematic diagram of the central tube single-column linear lifting series vertical cooling crystallizer proposed in this invention;

[0019] Figure 2 This is a top view of the cooling crystallization coil structure of the central tube single-column linear lifting series vertical cooling crystallizer proposed in this invention;

[0020] Figure 3 This is a three-dimensional schematic diagram of the crystallizer cylinder of the central tube single-column linear lifting series vertical cooling crystallizer proposed in this invention.

[0021] In the diagram: 1. Cooling crystallization coil; 101. Arc-shaped steel pipe section; 102. Straight steel pipe section; 103. Elbow; 2. Central single column; 3. Cooling circulating water pipeline; 4. Crystallizer cylinder; 5. Cover plate; 6. Frame; 7. Hydraulic lifting cylinder; 8. End cap; 9. Stirring device; 10. Double-edged arc scraper on cylinder wall; 11. Guide device; 12. Cylinder guide rail; 13. Orifice plate. Detailed Implementation

[0022] The present invention will be further explained below with reference to specific embodiments. Example

[0023] refer to Figure 1-3This embodiment proposes a vertical cooling crystallizer with a single-column linear lifting system, including a crystallizer cylinder 4 and a cooling crystallization coil 1 inside the crystallizer cylinder 4. A single-column central tube 2 is slidably connected inside the crystallizer cylinder 4, and the surface of the single-column central tube 2 is welded to the center of the cooling crystallization coil 1. A cooling circulating water pipeline 3 is provided inside the cooling circulating water pipeline 1, and the inlet and outlet of the cooling circulating water pipeline 3 are connected to the inlet and outlet of the cooling crystallization coil 1, respectively. A cover plate 5 is bolted to the top of the crystallizer cylinder 4. The top of the single-column central tube 2 passes through the central hole at the top of the cover plate 5 and is welded to a frame 6. Hydraulic lifting cylinders 7 are bolted to both sides of the bottom of the frame 6, and the bottom of the hydraulic lifting cylinders 7 is bolted to the top of the cover plate 5. A head 8 is welded to the bottom of the crystallizer cylinder 4, and a stirring device 9 is bolted to the bottom of the head 8. A central tube column 2 is installed inside the crystallizer cylinder 4, and cooling crystallization coils 1 are stacked vertically. The cooling crystallization coils 1, the central tube column 2, and the cooling circulating water pipes 3 form a cooling assembly. The central tube column 2 can drive the cooling crystallization coils 1 to move up and down. Cooling water inside the cooling circulating water pipes 3 can enter and exit the cooling crystallization coils 1. The cooling crystallization coils 1 include arc-shaped steel pipe sections 101, straight steel pipe sections 102, and elbows 103. There are three arc-shaped steel pipe sections 101, two straight steel pipe sections 102, and two elbows 103. The three arc-shaped steel pipe sections 101 are connected in series through two straight steel pipe sections 102. The arc-shaped steel pipe 101 is connected to the straight steel pipe 102 via elbow 103. Cooling water flows inside the arc-shaped steel pipe 101, the straight steel pipe 102, and the elbow 103, resulting in a more uniform distribution of the cooling crystallization coils 1 and eliminating the abrupt sharp angle defects caused by the straight arrangement. This significantly improves the wall-mounting and agglomeration phenomenon at the abrupt sharp angle positions during material crystallization. This structure significantly increases the effective cooling area per unit volume of the crystallizer, thereby increasing the equipment's cooling capacity. The arc-shaped steel pipe 101 and the straight steel pipe 102 are connected in series via elbow 103, and adjacent arc-shaped steel pipes 101 are connected in series via straight steel pipes 102. The structure of the arc-shaped steel pipe 101 and the straight steel pipe 102 facilitates the flow of cooling water and promotes cooling. Water circulates. A perforated plate 13 is welded to the surface of the central tube column 2. The surfaces of the arc-shaped steel pipe 101 and the straight steel pipe 102 are fixed to the perforated plate 13 through notches. The perforated plate 13 secures the arc-shaped and straight steel pipes 101 and enhances their stability. The cooling crystallization coil 1 is welded to the central tube column 2 through the perforated plate 13. There are three perforated plates 13, which enhance the stability of the cooling crystallization coil 1. Adjacent cooling crystallization coils 1 are stacked in multiple layers through cooling circulating water pipes 3. These layers are connected in series through cooling circulating water pipes 3 to form a cooling crystallization coil unit. The stacking of cooling crystallization coils 1 increases their surface area.Enhanced contact between the cooling crystallization coil 1 and the material facilitates cooling and crystallization. A double-edged arc scraper 10 is bolted to the surface of the cooling crystallization coil 1. During its vertical linear movement, the double-edged arc scraper 10 easily removes material adhering to the inner wall of the crystallizer cylinder 4 caused by excessive heat dissipation from the outside of the crystallizer. A guide device 11 is bolted to the side of the cooling crystallization coil 1, and a cylinder guide rail 12 is bolted to the inner wall of the crystallizer cylinder 4. The surface of the cylinder guide rail 12 slides in connection with the interior of the guide device 11. Due to the newly designed guide device 11 and cylinder guide rail 12, the linear vertical movement accuracy of the central tube single column 2 is guaranteed, preventing the vertical movement of the multi-column lifting tube. The internal components of the cooling crystallizer are prone to rubbing against the walls, causing the entire crystallizer to stop. The stirring device 9 includes a stirring motor and a stirring frame. The top of the stirring motor is bolted to the bottom of the end cap 8. The output end of the stirring motor extends into the interior of the crystallizer cylinder 4 and is keyed to the shaft of the stirring frame. The stirring motor is powered on and controlled by a motor controller. The stirring motor can drive the stirring frame to rotate. The central tube single column 2 linear lifting cooling crystallization coil 1 series technology makes the arrangement structure of the cooling crystallization coil 1 more scientific, effectively solving the material short-circuit problem of the previous multi-column lifting tube vertical cooling crystallizer. The distribution of the cooling crystallization coil 1 is more uniform, and the abrupt sharp corner defects caused by the linear arrangement are eliminated, making it more uniform. The phenomenon of wall-mounting and agglomeration at abrupt sharp corners during material crystallization is significantly improved. This structure significantly increases the effective cooling area per unit volume of the crystallizer, thereby increasing the cooling capacity of the equipment. The stress on the central tube single column 2 structure is single-point stress, and the stress point coincides with the center of gravity of all cooling crystallization coils 1 on a central axis. This arrangement minimizes the impact of the synchronous speed of multiple hydraulic lifting cylinders 7 on the verticality of the crystallizer cylinder 4. The horizontally placed cooling crystallization coil 1 is welded to the central tube single column 2 through the perforated plate 13, and its inlet and outlet of circulating water are connected to the cooling circulating water pipeline 3 set inside the central tube single column 2. The entire structure formed by the cooling crystallization coil 1 and the central tube single column 2 is placed in the crystallizer. Inside the cylinder 4, the upper central tube 2 passes through the central hole of the cover plate 5 and is welded to the upper multi-point radial frame 6. Multiple hydraulic lifting cylinders 7, located on the upper part of the cover plate 5, are connected to the frame 6 to provide power, enabling the linear motion of the entire internal components to be raised or lowered, thus agitating the crystallized material. A stirring device 9 installed on the bottom end cap 8 agitates the crystallized material, preventing clumping at the bottom and ensuring smooth discharge. The cooling circulating water pipe 3 uses a circulating pump to drive the cooling water flow, allowing the cooling water to circulate into the cooling circulating water pipe 3. The cooling water inside the cooling circulating water pipe 3 enters the cooling crystallization coil 1, from which the material is poured into the crystallizer cylinder 4. The cooling crystallization coil 1 cools and crystallizes the material inside the crystallizer cylinder 4.

[0024] Working principle: The horizontally placed cooling crystallization coil 1 is welded to the central tube single column 2 through the perforated plate 13. Its inlet and outlet of circulating water are connected to the cooling circulating water pipeline 3 set inside the central tube single column 2. The entire structure formed by the cooling crystallization coil 1 and the central tube single column 2 is placed inside the crystallizer cylinder 4. After the upper central tube single column 2 passes through the central hole set in the cover plate 5, it is welded to the upper multi-point radial frame 6. Multiple hydraulic lifting cylinders 7 set on the upper part of the cover plate 5 are connected to the frame 6 to provide power, realize the linear motion of lifting or lowering the overall internal parts to stir the crystallized material. The stirring device 9 installed on the bottom end cap 8 stirs the crystallized material to prevent the bottom material from clumping and keep the discharge smooth. The cooling circulating water pipeline 3 uses a circulating pump to drive the cooling water flow, allowing the cooling water to circulate into the cooling circulating water pipeline 3. The cooling water inside the cooling circulating water pipeline 3 enters the cooling crystallization coil 1, pouring the material into the crystallizer cylinder 4. The cooling crystallization coil 1 cools and crystallizes the material inside the crystallizer cylinder 4.

[0025] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A central tube single-column linear lifting series vertical cooling crystallizer, comprising a crystallizer cylinder (4) and a cooling crystallization coil (1) inside the crystallizer cylinder (4), characterized in that, The crystallizer cylinder (4) is slidably connected to a central tube single column (2). The surface of the central tube single column (2) is welded to the center of the cooling crystallization coil (1). The cooling crystallization coil (1) is provided with a cooling circulating water pipeline (3). The inlet and outlet of the cooling circulating water pipeline (3) are connected to the inlet and outlet of the cooling crystallization coil (1), respectively. The top of the crystallizer cylinder (4) is bolted to a cover plate (5). The top of the central tube column (2) passes through the central hole at the top of the cover plate (5) and is welded to a frame (6). Both sides of the bottom of the frame (6) are bolted to hydraulic lifting cylinders (7). The bottom of the hydraulic lifting cylinder (7) is bolted to the top of the cover plate (5). The bottom of the crystallizer cylinder (4) is welded to a head (8). The bottom of the head (8) is bolted to a stirring device (9). The crystallizer cylinder (4) is equipped with a central tube single column (2) inside, and cooling crystallization coils (1) are stacked on top of each other. The cooling crystallization coils (1), the central tube single column (2) and the cooling circulating water pipeline (3) constitute a cooling assembly. The cooling crystallization coil (1) includes an arc-shaped steel pipe (101), a straight steel pipe (102), and an elbow (103). There are three arc-shaped steel pipes (101), two straight steel pipes (102), and two elbows (103). The three arc-shaped steel pipes (101) are connected in series through two straight steel pipes (102). The arc-shaped steel pipes (101) are connected to the straight steel pipes (102) through elbows (103). The arc-shaped steel pipe (101) and the straight steel pipe (102) are connected in series by an elbow (103), and adjacent arc-shaped steel pipes (101) are connected in series by a straight steel pipe (102); The surface of the central tube column (2) is welded with a perforated plate (13), and the surfaces of the arc section steel pipe (101) and the straight section steel pipe (102) are fixed to the perforated plate (13) through the notch on the perforated plate (13); The cooling crystallization coil (1) is welded to the central tube column (2) through perforated plates (13), and there are three perforated plates (13).

2. The center column single column straight line lifting series vertical cooling crystallizer according to claim 1, characterized in that, Adjacent cooling crystallization coils (1) are stacked in multiple layers through cooling circulating water pipes (3), and the layers are connected in series through cooling circulating water pipes (3) to form a cooling crystallization coil unit.

3. The center column single column straight line lifting in-line cooling crystallizer of claim 1, wherein, The surface of the cooling crystallization coil (1) is bolted with a double-bladed arc scraper (10) for the cylinder wall.

4. The central tube single-column linear lifting series vertical cooling crystallizer according to claim 1, characterized in that, The cooling crystallization coil (1) is bolted to the side with a guide device (11), and the inner wall of the crystallizer cylinder (4) is bolted to a cylinder guide rail (12). The surface of the cylinder guide rail (12) is slidably connected to the inside of the guide device (11).

5. The center column single column straight line lift in-line vertical cooling crystallizer of claim 1, wherein, The stirring device (9) includes a stirring motor and a stirring frame. The top of the stirring motor is bolted to the bottom of the end cap (8). The output end of the stirring motor extends into the interior of the crystallizer cylinder (4) and is keyed to the axis of the stirring frame.

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