A method and equipment for preparing high-content, high-degree-of-deacetylation chitosan oligosaccharides

Abstract

This invention relates to the field of chitosan oligosaccharide production technology, specifically a method and equipment for preparing high-content, high-degree-of-deacetylation chitosan oligosaccharides. The method includes an upper cylinder, a cavity located inside the upper cylinder, an upper support fixed to the upper side of the upper cylinder, and a high-speed reaction filter cartridge rotatably mounted inside the upper cylinder. The high-speed reaction filter cartridge structure includes a feed hopper, a neck tube, and a rotating inner cylinder integrally arranged from top to bottom. After the solution is fed into the rotating inner cylinder of the high-speed reaction filter cartridge, it is not only mixed by the rotating stirring rod, but also by the reciprocating motion of the lifting cylinder, allowing the liquid to flow vertically, thereby improving the mixing and dissolving effect and efficiency. Simultaneously, the reverse rotation of the inner cylinder relative to the stirring rod creates strong collisions and mixing between the liquid propelled by the rotating sidewalls, the liquid driven by the rotating stirring rod, and the liquid pushed up and down by the lifting cylinder. Heating by a heating plate can also be incorporated during this process, thereby improving the overall mixing and dissolving efficiency and effect of the solution.

Description

Technical Field

[0001] This invention relates to the field of chitosan oligosaccharide production technology, specifically to a method and equipment for preparing high-content, high-degree-of-deacetylation chitosan oligosaccharide. Background Technology

[0002] The current preparation of high-content, high-degree-of-deacetylation chitosan oligosaccharides typically requires stirring water, powdered chitosan, and an acetic acid solution. Since the stirred reactor usually only uses a stirring paddle for rotation, this structure is not only relatively simple but also lacks functionality. The stirring and dissolution of water and powdered chitosan takes a long time, sometimes up to ten hours, resulting in slow efficiency and poor dissolution. Furthermore, it lacks the function of filtering impurities and particles, and is inconvenient for cleaning the inner wall of the mixing vessel and storing the stirred chitosan oligosaccharide solution. Therefore, there is an urgent need for equipment and a preparation method for high-content, high-degree-of-deacetylation chitosan oligosaccharides to overcome these shortcomings. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the purpose of this invention is to provide a method and equipment for preparing high-content, high-degree-of-deacetylation chitosan oligosaccharide, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: a device for high-content, high-degree-of-deacetylation chitosan oligosaccharide, comprising an upper cylinder, a cylinder cavity disposed inside the upper cylinder, an upper support fixed to the upper side of the upper cylinder, and a high-speed reaction filter cartridge rotatably installed inside the upper cylinder. The high-speed reaction filter cartridge structure includes a feed hopper, a neck tube, and a rotating inner cylinder integrally arranged from top to bottom. The bottom of the rotating inner cylinder is hollowed out and a funnel-shaped filter screen is fixedly disposed thereon. The middle part of the neck tube is rotatably installed on the top of the upper cylinder, allowing the feed hopper to be exposed on the upper side of the upper cylinder, while the rotating inner cylinder is disposed in the upper half of the cylinder cavity.

[0005] The top of the cylinder cavity is also equipped with a lifting cylinder, the inner wall of which is adapted to rotate and fit the outer wall of the rotating inner cylinder, and an electric control valve is installed on each of the four sides of the bottom of the lifting cylinder.

[0006] The lower side of the upper cylinder is integrally provided with a waste liquid for receiving the high-speed reaction filter cartridge and a storage box for storing various liquids. A fixed pipe is vertically fixed at the center of the bottom of the upper cylinder. The top of the fixed pipe tightly penetrates the bottom of the lifting cylinder and is located on the upper side of the funnel-shaped filter screen, so that the rotating inner cylinder is connected to the storage box through the fixed pipe.

[0007] The upper support is equipped with a rotating shaft that rotates and rises. The bottom of the rotating shaft is penetrated by the feed hopper and the neck pipe and is located inside the rotating inner cylinder. Multiple stirring rods are installed on the rotating shaft inside the rotating inner cylinder. A rotating piston is rotatably installed at the bottom of the rotating shaft. The rotating piston is located above the fixed pipe and can be inserted into the top cavity of the fixed pipe to achieve sealing.

[0008] A further improvement based on the above technical solution is that the upper support is provided with a lifting plate, and multiple first telescopic rods are installed on the four sides of the bottom of the lifting plate to connect with the upper support for lifting. The rotating shaft is rotatably installed in the middle of the lifting plate, and a first motor for driving the rotating shaft to rotate is installed on the upper side of the lifting plate. Second telescopic rods are installed on the four sides of the top of the cylinder cavity, and are connected to the outside of the lifting cylinder for lifting through the second telescopic rods.

[0009] A further improvement based on the above technical solution is that a second motor is installed in the middle of the upper support, and the second motor is equipped with a transmission belt through a transmission wheel. The transmission belt is sleeved on the transmission wheel on the outside of the neck tube and is used to drive the rotating inner cylinder to rotate.

[0010] A further improvement based on the above technical solution is that a heating plate is installed on the outside of the lifting cylinder, an auxiliary material port communicating with the cylinder cavity is opened on one side of the top of the upper cylinder, and a discharge valve pipe is installed on one side of the bottom of the upper cylinder.

[0011] A further improvement based on the above technical solution is that the inner wall of the rotating inner cylinder is equipped with a ring array of multiple oppositely arranged side wall plates, and each of the side wall plates is located above the funnel-shaped filter screen. When the rotating inner cylinder rotates, the liquid can be rotated by the side wall plates.

[0012] A further improvement based on the above technical solution is that the lifting cylinder can increase or decrease the liquid capacity inside the rotating inner cylinder when it rises or falls. When the lifting cylinder rises completely, it seals the bottom of the rotating inner cylinder. When the lifting cylinder moves up and down, it can increase the vertical flow speed of the liquid in the rotating inner cylinder. It also cooperates with the axial rotation of the rotating inner cylinder and the side wall plate, as well as the rotation of the stirring rod, to carry out a high-intensity mixing reaction.

[0013] A further improvement based on the above technical solution is that the storage box includes a wastewater tank, a first liquid tank, and a second liquid tank inside, and drain valve pipes are installed on the outer sides of the wastewater tank, the first liquid tank, and the second liquid tank. Inlet pipes are also installed on the upper side walls of the first liquid tank and the second liquid tank, and the wastewater tank receives wastewater directly below the fixed pipe.

[0014] A further improvement to the above technical solution is that the rotating shaft and each stirring rod are provided with interconnected water holes in the middle, and each stirring rod is equipped with a check nozzle corresponding to the water hole at its outer end.

[0015] A further improvement based on the above technical solution is that the storage box is equipped with a pumping mechanism for sending the liquid from the first liquid tank and the second liquid tank into the water hole inside the rotating shaft. The pumping mechanism includes an insert tube fixedly installed inside the fixed pipe, and the insert tube is rotatably connected through the water hole at the bottom of the rotating shaft and the middle of the rotating piston, so that the insert tube is connected to the water hole of the rotating shaft and the stirring rod. A water pump is installed in the middle of the insert tube. The water pump is installed on the upper side of the storage box, and the water inlet end of the water pump is equipped with two diversion pipes that are respectively connected to the first liquid tank and the second liquid tank, and each diversion pipe is equipped with a corresponding control valve.

[0016] A method for preparing high-content, high-degree-of-deacetylation chitosan oligosaccharide involves controlling the downward displacement of a rotating shaft so that the rotating piston at the bottom of the shaft first blocks the cavity of the fixed tube. Then, water and powdered chitosan are fed into the rotating inner cylinder from the feed hopper. By controlling the rotation of the rotating shaft, the stirring rods perform preliminary rotational mixing of the solution in the rotating inner cylinder. In addition, a lifting cylinder is used for reciprocating up and down. When the lifting cylinder descends, the mixed liquid can be filtered into the lifting cylinder. When the lifting cylinder rises, the liquid can be fed back upwards to the rotating inner cylinder, thereby creating vertical flow of the liquid and achieving a double mixing effect under the rotation of the stirring rods. At the same time, the rotating inner cylinder itself rotates in the opposite direction relative to the stirring rods, allowing the liquid to generate high-speed interlacing and collision in the rotating inner cylinder to achieve rapid mixing.

[0017] The storage box contains two liquids: a cleaning solution and an acetic acid solution. During the mixing process, the acetic acid solution is delivered from the bottom of the rotating shaft to each stirring rod and sprayed out, so that the stirring rods can mix and disperse in the liquid in the rotating inner cylinder at the same time. Acidification promotes the dissolution of chitosan and maintains the stability of the solution.

[0018] After the chitosan oligosaccharide solution is mixed, the lifting cylinder moves downwards, allowing the liquid to be filtered through the funnel-shaped filter to the bottom of the lifting cylinder. The chitosan oligosaccharide solution is then discharged to the bottom of the cylinder cavity for storage by opening the electronic control valve. After storage, the lifting cylinder rises again to reseal the lower side of the funnel-shaped filter, and the rotating shaft is controlled to move upwards, causing the rotating piston to disengage from the cavity of the fixed tube. This allows the filtered particulate impurities to be guided from the upper side of the funnel-shaped filter to the cavity of the fixed tube. During this process, a stirring rod rotates and sprays cleaning fluid to rotate and rinse the inner wall of the rotating inner cylinder, making it easier for the impurity particles on the funnel-shaped filter to be washed into the cavity of the fixed tube and fall into the storage box at the bottom for collection. After cleaning, the mixing process is repeated.

[0019] By adopting the above-described technical solution, the present invention has the following advantages over the prior art:

[0020] This invention utilizes the rotating inner cylinder of a high-speed reaction filter cartridge. After the solution is introduced into the cartridge, it is not only mixed by the rotating stirring rod, but also by the reciprocating motion of the lifting cylinder, creating vertical flow of the liquid. This improves the mixing and dissolving effect and efficiency. Simultaneously, the reverse rotation of the inner cylinder relative to the stirring rod creates strong collisions and mixing between the liquid propelled by the rotating sidewalls, the liquid driven by the rotating stirring rod, and the liquid pushed up and down by the lifting cylinder. Heating by a heating plate further enhances the overall mixing and dissolving efficiency. The lifting cylinder, positioned outside the rotating inner cylinder, improves both the stability of its guiding movement and the rotational stability of the inner cylinder, creating a mutually reinforcing effect. The dissolved chitosan oligosaccharide solution can be discharged into the cylinder cavity via an electrically controlled valve for storage, and later discharged according to usage requirements via a discharge valve.

[0021] Furthermore, during the rotation of the stirring rod, the acetic acid mixed solution stored in the first or second liquid tank in the storage box can still be pumped to each stirring rod and dispersed into the chitosan oligosaccharide solution. This simultaneous dispersion and stirring results in a better mixing effect. After the mixing is completed, the cleaning liquid stored in the first or second liquid tank in the storage box can also be pumped to the anti-reverse nozzle of the stirring rod through the pumping mechanism. This can effectively clean the inner wall of the rotating inner cylinder.

[0022] Meanwhile, the funnel-shaped filter at the bottom of the rotating inner cylinder can filter out particulate impurities that are not dissolved during the mixing of the chitosan oligosaccharide solution. In conjunction with the rotating shaft raising and driving the rotating piston to open the cavity of the fixed tube, the impurity particles can be more easily washed into the wastewater tank of the storage box for collection and treatment, which greatly improves the speed and convenience of use. Attached Figure Description

[0023] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

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

[0025] Figure 2 This is a schematic diagram of the internal structure of the lifting cylinder of the present invention;

[0026] Figure 3 This is a schematic diagram of the internal structure of the high-speed reaction filter cartridge and the lifting cylinder of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of the fixing tube, storage box, and rotating shaft of the present invention;

[0028] Figure 5 This is a schematic diagram of the pumping mechanism and rotating shaft of the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of the funnel-shaped filter screen, side wall plate, and fixing tube of the present invention;

[0030] In the diagram: Upper cylinder 1, Upper support 2, Lifting plate 21, First telescopic rod 212, Rotating shaft 22, Stirring rod 221, Anti-reverse nozzle 222, Rotating piston 223, Inclined surface 224, First motor 23, Second motor 24, Transmission belt 25, Feed hopper 3, Neck pipe 31, Rotating inner cylinder 32, Funnel-shaped filter screen 33, Side wall plate 34, Lifting cylinder 4, Electrically controlled valve 41, Second telescopic rod 42, Heating plate 43, Cylinder cavity 5, Auxiliary material port 51, Discharge valve pipe 510, Fixed pipe 52, Storage box 6, Wastewater tank 61, First liquid tank 62, Second liquid tank 63, Drain valve pipe 64, Insert pipe 7, Water pump 71, Diverter pipe 72, Control valve 73. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0032] like Figure 1-6As shown, the present invention provides a technical solution for a device for high-content, high-degree-of-deacetylation chitosan oligosaccharide: It includes an upper cylinder 1, a cylinder cavity 5 located inside the upper cylinder 1, an upper support 2 fixed to the upper side of the upper cylinder 1, and a high-speed reaction filter cartridge rotatably installed inside the upper cylinder 1. The high-speed reaction filter cartridge structure includes a feed hopper 3, a neck tube 31, and a rotating inner cylinder 32 integrally arranged from top to bottom. The bottom of the rotating inner cylinder 32 is hollowed out and a funnel-shaped filter screen 33 is fixedly installed thereon. The middle part of the neck tube 31 is rotatably installed on the top of the upper cylinder 1, allowing the feed hopper 3 to protrude from the upper side of the upper cylinder 1. The rotating inner cylinder 32 is located in the upper half of the cylinder cavity 5. This arrangement allows the high-speed reaction filter cartridge to rotatably mount on the upper cylinder 1. A lifting cylinder 4 is also vertically mounted on the top of the cylinder cavity 5. The inner wall of the lifting cylinder 4 is adapted to rotate and fit against the outer wall of the rotating inner cylinder 32, essentially fitting the lifting cylinder 4 around the outside of the rotating inner cylinder 32, thus improving the lifting capacity. The stability of the lifting cylinder 4 can also improve the rotational stability of the inner cylinder 32, thus playing a mutually reinforcing role. When the lifting cylinder 4 rises or falls, it can increase or decrease the liquid capacity inside the inner cylinder 32. When the lifting cylinder 4 is fully raised, it seals the bottom of the inner cylinder 32. When the lifting cylinder 4 moves up and down, it can increase the vertical flow speed of the liquid in the inner cylinder 32. The bottom of the lifting cylinder 4 is equipped with four electrically controlled valves 41. By opening the electrically controlled valves 41, the chitosan oligosaccharide solution in the lifting cylinder 4 can be discharged into the cylinder cavity 5 for storage. A discharge valve pipe 510 is installed on one side of the bottom of the upper cylinder 1. The stored chitosan oligosaccharide solution can be discharged outward through the discharge valve pipe 510. An auxiliary material port 51 connected to the cylinder cavity 5 is opened on one side of the top of the upper cylinder 1. Other liquids can be added through the auxiliary material port 51 as needed, or the cylinder cavity 5 can be cleaned through the auxiliary material port 51.

[0033] A fixed pipe 52 is vertically fixed at the center of the bottom of the upper cylinder 1. The top of the fixed pipe 52 tightly penetrates the bottom of the lifting cylinder 4 and is located on the upper side of the funnel-shaped filter screen 33, so that the rotating inner cylinder 32 is connected to the storage box 6 through the fixed pipe 52. In this way, after opening the cavity of the fixed pipe 52, the particulate impurities and wastewater filtered by the funnel-shaped filter screen 33 can be discharged into the storage box 6 for collection.

[0034] The upper cylinder 1 has an integrally installed waste liquid from high-speed reaction filter cartridge filtration and a storage box 6 for storing various liquids on its lower side. The storage box 6 includes a wastewater tank 61, a first liquid tank 62, and a second liquid tank 63. The first liquid tank 62 and the second liquid tank 63 can store corresponding cleaning solutions or acetic acid solutions that can improve the dissolution rate of chitosan oligosaccharide liquid. The wastewater tank 61, the first liquid tank 62, and the second liquid tank 63 are all equipped with corresponding drain valve pipes 64 on their outer sides, which can drain or replace the liquid that is not needed in the first liquid tank 62 and the second liquid tank 63. The upper side walls of the first liquid tank 62 and the second liquid tank 63 are also equipped with inlet pipes for liquid inlet. The wastewater tank 61 is located directly below the fixed pipe 52 to receive wastewater containing impurity particles.

[0035] Furthermore, in order to achieve rotational mixing of the liquid inside the rotating inner cylinder 32, a rotating shaft 22 is rotatably and dynamically mounted on the upper support 2. The bottom of the rotating shaft 22 is penetrated by the feed hopper 3 and the neck pipe 31 and is located inside the rotating inner cylinder 32. Multiple stirring rods 221 are mounted on the rotating shaft 22 inside the rotating inner cylinder 32. The rotation of the stirring rods 221 can rotate and stir the liquid inside the rotating inner cylinder 32, achieving preliminary mixing. In addition, a rotating piston 223 is rotatably fitted at the bottom of the rotating shaft 22. The rotating piston is located above the fixed pipe 52 and can be inserted into the top of the fixed pipe 52. The cavity is sealed, so the rotating shaft 22 not only plays a role in mixing and stirring when it rotates, but also plays a role in sealing and opening the fixed tube 52. When the fixed tube 52 is sealed, the rotating piston 223 is tightly plugged into the cavity of the fixed tube 52 and does not rotate with the rotating shaft 22. This can prevent the rotating inner cylinder 32 from blocking the flow of the mixed liquid into the storage box 6. When the fixed tube 52 is opened, the rotating piston 223 moves upward and leaves the cavity. This allows the impurity particles filtered by the funnel-shaped filter screen 33 to be guided through the fixed tube 52 to the wastewater tank 61 of the storage box 6 for collection and treatment. It is not only ingenious in structure, but also simple and flexible in use.

[0036] Furthermore, the upper support 2 is provided with a lifting plate 21. Multiple first telescopic rods 212 are installed on the four sides of the bottom of the lifting plate 21 to connect with the upper support 2 for lifting. The rotating shaft 22 is rotatably installed in the middle of the lifting plate 21. In this way, the four first telescopic rods 212 can push and pull the lifting plate 21 to lift and drive the rotating shaft 22 to lift and drive. The upper side of the lifting plate 21 is provided with a first motor 23 for driving the rotating shaft 22 to rotate. The first motor 23 can make the rotating shaft 22 rotate synchronously during lifting, so as to achieve the above-mentioned function of rotating and mixing the liquid in the rotating inner cylinder 32 and lifting and opening and closing the fixed pipe 52.

[0037] To improve mixing and filtration, second telescopic rods 42 are installed on the four sides of the top of the cylindrical cavity 5. These second telescopic rods 42 are connected to the outside of the lifting cylinder 4 for vertical movement. The extension and retraction of the second telescopic rods 42 allows the lifting cylinder 4 to move up and down repeatedly. When the stirring rod 221 rotates and stirs, the vertical movement of the lifting cylinder 4 creates fluidity in the liquid, improving mixing and dissolving efficiency. Simultaneously, a second motor 24 is installed in the middle of the upper support 2. This second motor 24 is connected to a transmission belt 25 via a transmission wheel. This transmission belt 25 is fitted onto the transmission wheel outside the neck tube 31 to drive the inner cylinder 32 to rotate. Furthermore, the inner wall of the rotating inner cylinder 32 is equipped with a ring array of multiple opposing side wall plates 34, and each side wall plate 34 is located above the funnel-shaped filter screen 33. When the rotating inner cylinder 32 rotates, the liquid can be rotated by the side wall plates 34. Therefore, combined with the reverse rotation of the rotating inner cylinder 32 relative to the stirring rod 221, the liquid rotated by the side wall plates 34 and the liquid driven by the rotation of the stirring rod 221 and the liquid pushed up and down by the lifting cylinder 4 will generate strong collision and mixing. The heating plate 43 installed on the outside of the lifting cylinder 4 can conduct heat to the liquid inside the rotating inner cylinder 32. The overall equipment greatly improves the mixing and dissolving efficiency and effect of the solution when it is working.

[0038] In this embodiment, in order to enable the stirring rod 221 to simultaneously spray water while rotating, thereby achieving the addition of a promoter to accelerate dissolution during the mixing process in the rotating inner cylinder 32 and the spraying of cleaning liquid to quickly clean the cylinder wall after the mixing is completed, the rotating shaft 22 and each stirring rod 221 are provided with interconnected water holes in their middle portions. Each stirring rod 221 is equipped with a check nozzle 222 corresponding to the water hole at its outer end. The check nozzle 222 can prevent the liquid in the rotating inner cylinder 32 from flowing back from the rotating inner cylinder 32 to the rotating shaft 22. The storage box 6 is equipped with a pumping mechanism for sending the liquid from the first liquid tank 62 and the second liquid tank 63 into the water hole inside the rotating shaft 22. The pumping mechanism includes an insert tube fixedly installed inside the fixed pipe 52. 7. The insertion tube 7 is rotatably connected to the water hole at the bottom of the rotating shaft 22 through the middle of the rotating piston 223, so that the insertion tube 7 is connected to the water hole of the rotating shaft 22 and the stirring rod 221. In this way, the insertion tube 7 remains different when the rotating shaft 22 rotates or rises and falls, but it remains connected to the water hole inside. A water pump 71 is installed in the middle of the insertion tube 7. The water pump 71 is installed on the upper side of the storage box 6, and the water inlet end of the water pump 71 is equipped with two diversion pipes 72 that are respectively connected to the first liquid tank 62 and the second liquid tank 63. Each diversion pipe 72 is equipped with a corresponding control valve 73. In this way, when the water pump 71 is working, it can sequentially draw the corresponding cleaning liquid or acetic acid solution from the first liquid tank 62 or the second liquid tank 63 into the water hole of the rotating shaft 22 and the stirring rod 221 and spray it out through the check nozzle 222.

[0039] A method for preparing high-content, high-degree-of-deacetylation chitosan oligosaccharide involves controlling four first telescopic rods 212 to simultaneously push the lifting plate 21 downwards, causing the rotating piston 223 at the bottom of the rotating shaft 22 to first block the cavity of the fixed tube 52. Then, water and powdered chitosan containing a degree of deacetylation ≥85% are fed from the feed hopper 3 into the rotating inner cylinder 32. The first motor 23 drives the rotating shaft 22 to rotate, and each stirring rod 221 performs preliminary rotational mixing of the solution in the rotating inner cylinder 32. Based on this, the second telescopic rod pushes the lifting cylinder 4 to move up and down simultaneously. When the lifting cylinder 4 descends, the mixed liquid is filtered into the lifting cylinder 4; when the lifting cylinder 4 rises, the liquid is returned upwards to the rotating inner cylinder 32, thus creating an up-and-down flow of liquid. The rotating inner cylinder 32 achieves a double mixing effect under the rotation of the stirring rod 221. At the same time, since the second motor 24 is installed in the middle of the upper support 2, the second motor 24 drives the neck tube 31 through the transmission belt 25, which enables the rotating inner cylinder 32 to rotate. The inner wall of the rotating inner cylinder 32 is equipped with multiple oppositely arranged side wall plates 34 in a ring array, and each side wall plate 34 is located above the funnel-shaped filter screen 33. When the rotating inner cylinder 32 rotates, the liquid can be rotated by the side wall plates 34. Therefore, combined with the reverse rotation of the rotating inner cylinder 32 relative to the stirring rod 221, the liquid rotated by the side wall plates 34 and the liquid driven by the rotation of the stirring rod 221 and the liquid pushed up and down by the lifting cylinder 4 will generate strong collision and mixing. The high-speed interlacing collision in the rotating inner cylinder 32 achieves rapid mixing.

[0040] The first liquid tank 62 and the second liquid tank 63 in the storage box 6 respectively store cleaning liquid and acetic acid solution. During the above mixing, the acetic acid solution in the first liquid tank 62 can be pumped by the water pump 71, passing through the diversion pipe 72 and the insertion pipe 7 in sequence, and sent into the corresponding water holes in the rotating shaft 22 and the stirring rod 221. It is then sprayed out by the anti-reverse nozzle 222, so that the stirring rod 221 can mix and stir while rotating and dispersing in the liquid in the rotating inner cylinder 32. Acidification promotes the dissolution of chitosan and maintains the stability of the solution. During this period, the heating plate 43 installed on the outside of the lifting cylinder 4 can conduct heat to the mixed liquid inside the rotating inner cylinder 32, which is beneficial to improving the mixing and dissolution efficiency and effect of the solution.

[0041] After the chitosan oligosaccharide solution is mixed, the lifting cylinder 4 moves downward, allowing the liquid to be filtered through the funnel-shaped filter screen 33 to the bottom of the lifting cylinder 4. The chitosan oligosaccharide solution is then discharged to the bottom of the cylinder cavity 5 for storage by opening the electric control valve 41. After storage, the lifting cylinder 4 rises to re-seal the lower side of the funnel-shaped filter screen 33, and the rotating shaft 22 is controlled to move upward, allowing the rotating piston 223 to disengage from the cavity of the fixed tube 52. This allows the filtered particulate impurities to be guided from the upper side of the funnel-shaped filter screen 33 to the cavity of the fixed tube 52. During this process, the stirring rod 221 rotates and sprays out cleaning liquid to rotate and rinse the inner wall of the rotating inner cylinder 32, making it easier for the impurity particles on the funnel-shaped filter screen 33 to be flushed into the cavity of the fixed tube 52 and then fall into the storage box 6 at the bottom for collection. After the rotating inner cylinder 32 is cleaned, the material is fed again for the next mixing operation.

[0042] It should be noted that the device for high-content, high-degree-of-deacetylation chitosan oligosaccharide of the present invention mainly improves the above-mentioned structure. The functions, components and structures not mentioned can be implemented by using components and structures in the prior art that can achieve the corresponding functions. For example, the first telescopic rod and the first telescopic rod can be used by pneumatic telescopic cylinders, hydraulic telescopic cylinders or electric propulsion in the prior art.

[0043] The present invention has been described in detail above through specific embodiments, but these are not intended to limit the invention. Many modifications and improvements can be made by those skilled in the art without departing from the principles of the invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. A device for preparing high-content, high-degree-of-deacetylation chitosan oligosaccharides, characterized in that, include: The high-speed reaction filter cartridge includes an upper cylinder, a cylinder cavity located inside the upper cylinder, an upper support fixed to the upper side of the upper cylinder, and a high-speed reaction filter cartridge rotatably installed inside the upper cylinder. The high-speed reaction filter cartridge structure includes a feed hopper, a neck tube, and a rotating inner cylinder integrally arranged from top to bottom. The bottom of the rotating inner cylinder is hollow and a funnel-shaped filter screen is fixedly installed thereon. The middle part of the neck tube is rotatably installed on the top of the upper cylinder, allowing the feed hopper to be exposed on the upper side of the upper cylinder. The rotating inner cylinder is located in the upper half of the cylinder cavity. The top of the cylinder cavity is also equipped with a lifting cylinder, the inner wall of which is adapted to rotate and fit the outer wall of the rotating inner cylinder, and an electric control valve is installed on each of the four sides of the bottom of the lifting cylinder. The lower side of the upper cylinder is integrally provided with a waste liquid for receiving the high-speed reaction filter cartridge and a storage box for storing various liquids. A fixed pipe is vertically fixed at the center of the bottom of the upper cylinder. The top of the fixed pipe tightly penetrates the bottom of the lifting cylinder and is located on the upper side of the funnel-shaped filter screen, so that the rotating inner cylinder is connected to the storage box through the fixed pipe. The upper support is equipped with a rotating shaft that rotates and rises. The bottom of the rotating shaft is penetrated by the feed hopper and the neck pipe and is located inside the rotating inner cylinder. Multiple stirring rods are installed on the rotating shaft inside the rotating inner cylinder. A rotating piston is rotatably installed at the bottom of the rotating shaft. The rotating piston is located above the fixed pipe and can be inserted into the top cavity of the fixed pipe to achieve sealing.

2. The equipment for preparing high-content, high-degree-of-deacetylation chitosan oligosaccharide according to claim 1, characterized in that, The upper support is provided with a lifting plate. Multiple first telescopic rods are installed on the four sides of the bottom of the lifting plate to connect with the upper support for lifting. The rotating shaft is rotatably installed in the middle of the lifting plate, and a first motor for driving the rotating shaft to rotate is installed on the upper side of the lifting plate. Second telescopic rods are installed on the four sides of the top of the cylinder cavity, and are connected to the outside of the lifting cylinder for lifting through the second telescopic rods.

3. The equipment for preparing high-content, high-degree-of-deacetylation chitosan oligosaccharide according to claim 2, characterized in that, A second motor is installed in the middle of the upper support. The second motor is connected to a transmission belt via a transmission wheel. The transmission belt is sleeved on the transmission wheel on the outside of the neck tube and is used to drive the inner cylinder to rotate.

4. The equipment for preparing high-content, high-degree-of-deacetylation chitosan oligosaccharide according to claim 3, characterized in that, A heating plate is installed on the outside of the lifting cylinder, an auxiliary material port communicating with the cylinder cavity is opened on one side of the top of the upper cylinder, and a discharge valve pipe is installed on one side of the bottom of the upper cylinder.

5. The equipment for preparing high-content, high-degree-of-deacetylation chitosan oligosaccharide according to claim 4, characterized in that, The inner wall of the rotating inner cylinder is equipped with a ring array of multiple opposing sidewall plates, and each sidewall plate is located above the funnel-shaped filter screen. When the rotating inner cylinder rotates, the liquid can be rotated by the sidewall plates.

6. The equipment for preparing high-content, high-degree-of-deacetylation chitosan oligosaccharide according to claim 5, characterized in that, The lifting cylinder can increase or decrease the liquid capacity inside the rotating inner cylinder when it rises or falls. When the lifting cylinder rises completely, it seals the bottom of the rotating inner cylinder. When the lifting cylinder moves up and down, it can increase the vertical flow speed of the liquid in the rotating inner cylinder. It also allows for a high-intensity mixing reaction in conjunction with the axial rotation of the rotating inner cylinder and side wall plate, as well as the rotation of the stirring rod.

7. The equipment for preparing high-content, high-degree-of-deacetylation chitosan oligosaccharide according to claim 6, characterized in that: The storage box includes a wastewater tank, a first liquid tank, and a second liquid tank. Drain valve pipes are installed on the outer sides of the wastewater tank, the first liquid tank, and the second liquid tank. Inlet pipes are also installed on the upper side walls of the first liquid tank and the second liquid tank. The wastewater tank receives wastewater directly below the fixed pipe.

8. The equipment for preparing high-content, high-degree-of-deacetylation chitosan oligosaccharide according to claim 7, characterized in that: The rotating shaft and each stirring rod are provided with interconnected water holes in the middle, and each stirring rod is equipped with a check nozzle corresponding to the water hole at its outer end.

9. The equipment for preparing high-content, high-degree-of-deacetylation chitosan oligosaccharide according to claim 8, characterized in that: The storage box is equipped with a pumping mechanism for feeding the liquid from the first and second liquid tanks into the water holes of the rotating shaft. The pumping mechanism includes an insert tube fixedly installed inside a fixed pipe. The insert tube is rotatably connected through the water holes at the bottom of the rotating shaft and the center of the rotating piston, allowing the insert tube to communicate with the water holes of the rotating shaft and the stirring rod. A water pump is installed in the center of the insert tube. The water pump is installed on the upper side of the storage box, and the water inlet end of the water pump is equipped with two diversion pipes that are respectively connected to the first and second liquid tanks. Each diversion pipe is equipped with a corresponding control valve.

10. The preparation method of the equipment for preparing high-content, high-degree-of-deacetylation chitosan oligosaccharide according to claim 9, characterized in that, By controlling the downward displacement of the rotating shaft, the rotating piston at the bottom of the rotating shaft first blocks the cavity of the fixed tube. At this time, water and powdered chitosan are fed into the rotating inner cylinder from the feed hopper. By controlling the rotation of the rotating shaft, each stirring rod performs preliminary rotational mixing of the solution in the rotating inner cylinder. Based on this, the lifting cylinder is used for reciprocating up and down. When the lifting cylinder descends, the mixed liquid is filtered into the lifting cylinder. When the lifting cylinder rises, the liquid is fed back up to the rotating inner cylinder, thereby creating vertical flow of the liquid and achieving a double mixing effect under the rotation of the stirring rods. At the same time, the rotating inner cylinder itself rotates in the opposite direction relative to the stirring rods, allowing the liquid to generate high-speed interlacing and collision in the rotating inner cylinder to achieve rapid mixing. The storage box contains two liquids: a cleaning solution and an acetic acid solution. During the mixing process, the acetic acid solution is delivered from the bottom of the rotating shaft to each stirring rod and sprayed out, so that the stirring rods can mix and disperse in the liquid in the rotating inner cylinder at the same time. Acidification promotes the dissolution of chitosan and maintains the stability of the solution. After the chitosan oligosaccharide solution is mixed, the lifting cylinder moves downwards, allowing the liquid to be filtered through the funnel-shaped filter to the bottom of the lifting cylinder. The chitosan oligosaccharide solution is then discharged to the bottom of the cylinder cavity for storage by opening the electronic control valve. After storage, the lifting cylinder rises again to reseal the lower side of the funnel-shaped filter, and the rotating shaft is controlled to move upwards, causing the rotating piston to disengage from the cavity of the fixed tube. This allows the filtered particulate impurities to be guided from the upper side of the funnel-shaped filter to the cavity of the fixed tube. During this process, a stirring rod rotates and sprays cleaning fluid to rotate and rinse the inner wall of the rotating inner cylinder, making it easier for the impurity particles on the funnel-shaped filter to be washed into the cavity of the fixed tube and fall into the storage box at the bottom for collection. After cleaning, the mixing process is repeated.

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