Rice starch enzyme hydrolysis device and method

Abstract

This invention discloses an enzymatic hydrolysis device and method for rice starch lipid substitute, belonging to the field of enzymatic hydrolysis equipment technology. This invention addresses the problems of large temperature gradients and localized overheating in traditional heat exchange methods. By constructing an immersive dynamic differential heat exchange and stirring system consisting of a grid ring rotating with the main rotor and a spiral heat pipe fixed to its inner wall, and a rotating fan plate rotating independently with the auxiliary rotor, the heat transfer path of the traditional jacketed heat exchanger is completely reconstructed. This achieves immersive, direct, and full-contact heat exchange between the heat exchange medium and the material, eliminating the radial temperature gradient within the reactor at its source and avoiding problems such as starch coking and premature amylase inactivation caused by localized overheating. Simultaneously, the differential rotation of the two components creates a continuous sweeping effect on the spiral heat pipe wall, enhancing the turbulence on the heat exchange surface, improving heat exchange efficiency and temperature field uniformity, and ensuring the stable and controllable enzymatic hydrolysis reaction of rice starch.

Description

Technical Field

[0001] This invention relates to the field of enzymatic hydrolysis equipment technology, specifically to an enzymatic hydrolysis device and method for rice starch lipid substitute. Background Technology

[0002] With the increasing demand for low-fat and healthy foods, rice starch, due to its wide availability, low cost, and low calories, has become a preferred raw material for replacing oils in the food industry. Rice starch needs to undergo enzymatic hydrolysis to break down its long molecular chains into short-chain dextrins of specific lengths, forming a smooth, gel-like texture similar to fat, in order to achieve oil substitution. Currently, the industry commonly uses batch stirred reactors as enzymatic hydrolysis devices, coupled with conventional enzymatic hydrolysis processes. The process mainly includes slurry preparation, parameter adjustment, enzymatic reaction, enzyme inactivation termination, and post-processing. This device has a simple structure and low investment threshold, and can achieve basic starch enzymatic hydrolysis. However, the heat transfer still uses a jacketed structure, resulting in a large temperature gradient, which easily leads to localized overheating, causing starch scorching, premature enzyme inactivation, reduced product whiteness, and lower enzymatic hydrolysis efficiency. The enzyme inactivation stage uses a whole-body heating method, resulting in a long heating time.

[0003] For example, referring to the temperature-controlled enzymatic hydrolysis reaction device for rice starch lipid substitute disclosed in patent publication number CN120843266A, it makes technical improvements to the temperature control aspect of the prior art. However, in this solution, a stable temperature control environment is formed through structural optimization of the outer shell component and the inner liner component. However, its heat exchange essence is still the radial transfer of heat from the vessel wall to the center, resulting in a large temperature difference in the radial direction inside the vessel, which is difficult to meet the whiteness requirements of the lipid substitute product. In addition, the long reaction process of traditional enzymatic hydrolysis tanks inevitably leads to back mixing, meaning that the simple vertical cylinder + stirring paddle structure design makes it difficult to achieve uniform temperature heat exchange. To address this, this application proposes a solution: using built-in tube bundle heating combined with vacuum insulation to achieve uniform temperature heat exchange, realizing full contact countercurrent heat exchange between the material and the heat exchange medium, thus solving the problems of large temperature gradient and local overheating in the above heat exchange methods. Summary of the Invention

[0004] The purpose of this invention is to provide an enzymatic hydrolysis device and method for rice starch lipid substitute, which solves the problems of large temperature gradient and local overheating in traditional heat exchange methods.

[0005] The objective of this invention can be achieved through the following technical solution: an enzymatic hydrolysis device for rice starch lipid substitute, comprising an enzymatic hydrolysis tank; A baffle ring is rotatably mounted on the inner wall of the enzymatic hydrolysis tank, and a spiral temperature tube is installed on the inner wall of the baffle ring. A rotating fan plate is coaxially rotatably disposed in the middle of the baffle layer ring, and the rotating fan plate has a gap for the baffle layer ring and the spiral temperature pipe to pass through; The sealing plate is set at the top and bottom of the grid ring and the rotating fan plate, and the sealing plate at the top is rotatably connected to the enzymatic hydrolysis tank. An adjustable frame structure is provided, comprising a support plate and a deflector frame. The bottom of the deflector frame is hinged to the support plate. The enzymatic hydrolysis tank is vertically mounted on the deflector frame. An actuator is mounted on the support plate for adjusting the tilt angle of the enzymatic hydrolysis tank.

[0006] The enzymatic hydrolysis vessel is further configured such that a main rotating rod and a secondary rotating cylinder are rotatably mounted in the middle, and the main rotating rod and the secondary rotating cylinder are respectively connected to the baffle ring and the rotating fan plate.

[0007] The configuration is further defined as follows: a drive motor A is provided at the upper end of the main rotating rod, a secondary drive tooth is sleeved on the outside of the secondary rotating drum, a drive motor B and a main drive tooth meshing with the secondary drive tooth are installed on the outside of the secondary drive tooth, and the drive motor A and drive motor B are respectively used for the rotation of the main rotating rod and the secondary rotating drum.

[0008] The device is further configured such that: a material discharge hole is provided on the bottom sealing plate for material to fall, and an enzyme addition ring tube runs through the middle of the bottom sealing plate, with the outlet of the enzyme addition ring tube facing upward and evenly distributed.

[0009] The adjustment frame structure is further configured such that: a base plate is included, a support plate is installed on the upper part of the base plate, a sliding block is slidably installed in the middle of the support plate, and a cylinder with its output end hinged to the deflection frame is rotatably installed on the upper end of the sliding block.

[0010] A further configuration is provided: a second cylinder is installed on the bottom of the support plate facing outwards, and the output end of the second cylinder is connected to a sliding block for adjusting the horizontal position of the sliding block.

[0011] The enzymatic hydrolysis vessel is further configured such that an outer protective sleeve is provided around its outer bottom, the outer protective sleeve and the enzymatic hydrolysis vessel are in a vacuum state, and the enzymatic hydrolysis vessel is connected to the deflection frame through the outer protective sleeve.

[0012] The enzymatic hydrolysis tank is further configured such that: a tank cover is installed on the top of the tank, a through hole is opened on the sealing plate at the top, and a feed pipe is installed on the tank cover that is intermittently connected to the through hole.

[0013] A further configuration is provided: a feed pipe is installed at the lower end of the enzymatic hydrolysis tank, and a solenoid valve for feed control is installed on the feed pipe.

[0014] An enzymatic hydrolysis method for rice starch lipid substitute includes the following steps: Step 1: In the slurry feeding process, rice starch and deionized water are mixed according to a preset solid-liquid ratio to prepare starch slurry. At the same time, drive motor A drives the baffle ring to rotate, so that the feed hole of the top sealing plate is coaxially aligned with the feed pipe. The prepared starch slurry is quantitatively delivered to the enzymatic reaction chamber inside the enzymatic hydrolysis tank through the feed pipe. After the feeding is completed, drive motor A drives the baffle ring to rotate, so that the feed hole and the feed pipe are misaligned, thus completing the sealing and isolation of the reaction chamber. Step 2: Constant Temperature Enzymatic Hydrolysis Process. Drive motors A and B are started, driving the main rotating rod to rotate the baffle ring and spiral heat pipe, and the auxiliary rotating drum to rotate the fan plate at preset differential speed parameters. Simultaneously, a constant temperature heat exchange medium at a preset temperature is continuously introduced into the spiral heat pipe, immersing the starch slurry in the enzymatic hydrolysis reaction chamber for constant temperature heat exchange, stabilizing the system temperature within the optimal reaction temperature range for amylase. Simultaneously, a preset amount of amylase preparation is quantitatively and uniformly sprayed into the reaction chamber through the enzyme addition ring. Under the stirring action of the rotating fan plate, the amylase preparation mixes rapidly and uniformly with the starch slurry, undergoing a controlled enzymatic hydrolysis reaction of rice starch in a constant temperature environment to prepare a rice starch dextrin system with a specific chain length distribution. During the enzymatic hydrolysis process, the hydrolysis tank can be adjusted to a preset tilt angle through the coordinated action of cylinders one and two, optimizing the material flow field distribution and further improving the uniformity of stirring and heat exchange. Step 3: Enzyme inactivation termination process. When the enzymatic hydrolysis reaction reaches the preset reaction time and target value, stop the circulation of the room temperature heat exchange medium and quickly introduce the high temperature heat exchange medium into the spiral heat exchange tube. With the rotation of the spiral heat exchange tube and the high-speed stirring of the rotating fan plate, the enzymatic hydrolysis system is rapidly heated to the enzyme inactivation temperature and kept at the preset temperature for a preset time. After the amylase is inactivated, the enzymatic hydrolysis reaction is terminated. Step 4: Post-discharge processing. After enzyme inactivation, the solenoid valve is opened, and the enzymatically hydrolyzed material is quickly discharged from the hydrolysis tank through the discharge port and discharge pipe. For any remaining material in the tank, the frame structure is adjusted to drive the hydrolysis tank to a large-angle discharge position to completely discharge the remaining material. After subsequent cooling, centrifugation for impurity removal, and spray drying, the discharged material yields the finished rice starch lipid substitute. The present invention has the following beneficial effects: 1. This invention constructs an immersion dynamic differential heat exchange stirring system consisting of a grid ring that rotates with the main rotating rod and a spiral heat pipe fixed to its inner wall, and a rotating fan plate that rotates independently with the auxiliary rotating cylinder. This completely reconstructs the heat transfer path of the traditional jacketed heat exchanger, realizing immersion direct full-contact heat exchange between the heat exchange medium and the material. It eliminates the radial temperature gradient inside the vessel from the root, avoiding the problems of starch coking and premature deactivation of amylase caused by local overheating. At the same time, the differential rotation of the two forms a continuous sweeping effect on the wall of the spiral heat pipe, which enhances the turbulence of the heat exchange surface, improves the heat exchange efficiency and temperature field uniformity, and ensures the stability and controllability of the rice starch enzymatic hydrolysis reaction. 2. By constructing a complete enzymatic hydrolysis process control system consisting of a sealed independent enzymatic hydrolysis reaction chamber enclosed by upper and lower sealing plates and a grid ring, an enzyme addition ring pipe with uniform enzyme distribution at the bottom, an adjustable tilt frame structure composed of a support plate, a deflector, cylinder one and cylinder two, and a vacuum outer protective jacket covering the outside of the enzymatic hydrolysis tank, the axial back-mixing phenomenon of materials is effectively suppressed, and the rapid and uniform mixing of enzyme preparations and materials is achieved to ensure the uniformity of the degree of enzymatic hydrolysis. At the same time, the tilt angle of the enzymatic hydrolysis tank can be flexibly adjusted by adjusting the frame structure, which can optimize the material flow field distribution during the reaction process, eliminate the stirring dead zone, and achieve rapid and complete discharge of materials, avoiding cross-contamination between batches. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a front sectional view of the present invention; Figure 3 This is a side sectional view of the present invention; Figure 4 This is a cross-sectional schematic diagram of the internal structure of the temperature uniformity barrier of the present invention; Figure 5 This is a schematic diagram of the coaxial double rod installation structure of the present invention; Figure 6 This is a schematic diagram of the inner bottom structure of the enzymatic hydrolysis vessel of the present invention; Figure 7 This is a schematic diagram showing the three state transitions of the enzymatic hydrolysis vessel of the present invention.

[0017] In the diagram: 1. Base plate; 2. Support plate; 3. Deflector frame; 4. Enzymatic hydrolysis tank; 5. Outer protective jacket; 6. Tank lid; 7. Cylinder 1; 8. Sliding block; 9. Main rotating rod; 10. Secondary rotating cylinder; 11. Feed pipe; 12. Baffle ring; 13. Spiral heating pipe; 14. Rotating fan plate; 15. Sealing plate; 16. Discharge pipe; 17. Solenoid valve; 18. Cylinder 2; 19. Discharge hole; 20. Main drive gear; 21. Secondary drive gear; 22. Enzyme addition ring pipe. Detailed Implementation

[0018] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1 To address the problems of large temperature gradients and localized overheating in traditional heat exchange methods, the following technical solution is proposed: Reference Figure 1 - Figure 7 As shown, this embodiment of an enzymatic hydrolysis device for rice starch lipid substitute includes an enzymatic hydrolysis tank 4; a baffle ring 12, which is rotatably disposed on the inner wall of the enzymatic hydrolysis tank 4, and a spiral temperature tube 13 is installed on the inner wall of the baffle ring 12; a rotating fan plate 14, which is coaxially rotatably disposed in the middle of the baffle ring 12, and a gap is opened on the rotating fan plate 14 for the baffle ring 12 and the spiral temperature tube 13 to pass through; and a sealing plate 15, which is disposed at the top and bottom of the baffle ring 12 and the rotating fan plate 14, and the sealing plate 15 at the top is rotatably connected to the enzymatic hydrolysis tank 4. Reference Figure 1 and Figure 7 As shown, the adjustment frame structure includes a support plate 2 and a deflection frame 3. The bottom of the deflection frame 3 is hinged to the support plate 2. The enzymatic hydrolysis tank 4 is vertically installed on the deflection frame 3. An actuator is installed on the support plate 2. The actuator is used to adjust the tilt angle of the enzymatic hydrolysis tank 4. The enzymatic hydrolysis tank 4 has a main rotating rod 9 and an auxiliary rotating cylinder 10 rotatably mounted in the middle. The main rotating rod 9 and the auxiliary rotating cylinder 10 are respectively connected to the baffle ring 12 and the rotating fan plate 14. The upper end of the rotating rod 9 is equipped with a drive motor A. The auxiliary rotating cylinder 10 is fitted with an auxiliary drive tooth 21. The auxiliary drive tooth 21 is equipped with a drive motor B and a main drive tooth 20 that meshes with it. The drive motor A and the drive motor B are used for the rotation of the main rotating rod 9 and the auxiliary rotating cylinder 10, respectively. The differential rotation of the rotating fan plate 14 and the baffle ring 12 causes the fan blades of the rotating fan plate 14 to continuously sweep the wall of the spiral heat pipe 13, scraping off the starch gel layer that may be attached to the surface of the pipe wall, avoiding the decrease in heat exchange efficiency caused by scaling on the heat exchange surface, and at the same time enhancing the degree of material turbulence on the surface of the pipe wall, further improving the heat exchange efficiency and temperature field uniformity.

[0020] The top of the enzymatic hydrolysis tank 4 is equipped with a tank cover 6. A through hole is opened on the sealing plate 15 at the top. A feed pipe 11 that is intermittently connected to the through hole is installed on the tank cover 6. A feed pipe 16 is installed at the lower end of the enzymatic hydrolysis tank 4. A solenoid valve 17 for feed control is installed on the feed pipe 16. The sealed reaction chamber formed by the upper and lower sealing plates 15 and the baffle ring 12 can effectively prevent the material from axial back mixing in the enzymatic hydrolysis tank 4, so that the material completes the enzymatic hydrolysis reaction according to the preset process, and ensures that the degree of enzymatic hydrolysis of the material at different positions is uniform and stable.

[0021] Basic principle: During the enzymatic hydrolysis of rice starch, drive motor A drives the main rotating rod 9 to drive the baffle ring 12 and the spiral heat pipe 13 to rotate around the central axis of the tank at a preset speed. Drive motor B drives the auxiliary rotating drum 10 to drive the rotating fan plate 14 to rotate at a speed different from that of the baffle ring 12, forming a dynamic differential heat exchange and stirring system. The spiral heat pipe 13 rotates circumferentially with the baffle ring 12, transforming the heat exchange unit from a traditional fixed vessel wall to a dynamic structure immersed in the material. The heat of the heat exchange medium is directly transferred to the surrounding material through the pipe wall of the spiral heat pipe 13, rather than being transferred radially inward through the vessel wall. This fundamentally eliminates the radial temperature gradient of traditional jacketed heat exchange and avoids local overheating and coking of the material. Meanwhile, the spiral structure of the spiral heat pipe 13 forms an axial flow guiding effect on the material during rotation. Combined with the radial shearing and stirring effect of the rotating fan plate 14, the material forms a spiral composite flow field in the enzymatic reaction chamber. Each part of the material can fully and uniformly contact the wall of the spiral heat pipe 13, ensuring that the temperature is uniform throughout the enzymatic system, preventing the amylase from being deactivated prematurely due to local high temperature, and ensuring the stability and controllability of the enzymatic reaction.

[0022] Example 2 Reference Figure 1 - Figure 7 As shown, the bottom sealing plate 15 has a discharge hole 19 for material to fall, and the middle of the bottom sealing plate 15 has an enzyme addition loop tube 22 running through it. The discharge port of the enzyme addition loop tube 22 faces upward and is evenly distributed. The upper end face of the enzyme addition loop 22 has multiple sets of evenly distributed discharge ports, which face upwards and are directly opposite the inner cavity of the enzymatic reaction chamber. This allows the enzyme preparation to be sprayed evenly and dispersed into the material system, achieving rapid and uniform mixing of the enzyme preparation and starch milk, and avoiding the problem of uneven enzyme concentration distribution caused by traditional top enzyme addition.

[0023] The adjustment frame structure also includes a base plate 1, a support plate 2 installed on the upper end of the base plate 1, a sliding block 8 slidably installed in the middle of the support plate 2, a cylinder 7 with its output end hinged to the deflection frame 3 rotatably installed on the upper end of the sliding block 8, and a cylinder 18 with its output end connected to the sliding block 8 installed on the bottom of the support plate 2 facing outwards. The output end of the cylinder 18 is connected to the sliding block 8 and is used to adjust the horizontal position of the sliding block 8. Cylinder 2 18 is used to adjust the horizontal position of sliding block 8. By driving sliding block 8 to move horizontally through cylinder 2 18, the position of the support hinge point of cylinder 1 7 can be adjusted. In conjunction with the extension and retraction of the piston rod of cylinder 1 7, a wider range of tilt angle adjustment of enzymatic hydrolysis tank 4 can be achieved. At the same time, the support force structure under the tilt position can be optimized, and the structural stability of the device operation can be improved.

[0024] Reference Figure 2 As shown, the bottom of the enzymatic hydrolysis vessel 4 is covered with an outer protective jacket 5. The outer protective jacket 5 and the enzymatic hydrolysis vessel 4 are in a vacuum state. The enzymatic hydrolysis vessel 4 is connected to the deflection frame 3 through the outer protective jacket 5. The vacuum insulation cavity is in a vacuum state, which can effectively isolate the heat transfer between the inside of the enzymatic hydrolysis vessel 4 and the external environment, reduce heat loss during the reaction process, and avoid the interference of external environmental temperature fluctuations on the enzymatic hydrolysis system.

[0025] In this embodiment, during the enzymatic hydrolysis reaction, the sliding block 8 is driven to move horizontally by cylinder 2 18, and in conjunction with the extension and retraction of cylinder 1 7, the enzymatic hydrolysis tank 4 can be adjusted to a preset tilt reaction angle, thereby changing the material flow field morphology in the enzymatic hydrolysis reaction chamber, further eliminating the stirring dead zone, and improving the uniformity of material mixing and heat exchange. Enzyme addition loop 22 sprays enzyme preparation uniformly upward from the bottom of the reaction chamber. Under the stirring action of rotating fan plate 14, enzyme preparation diffuses uniformly from bottom to top with the material flow field, realizing rapid homogenization of enzyme concentration in the whole chamber, shortening the induction period of enzymatic hydrolysis reaction, and improving the consistency of reaction efficiency and degree of enzymatic hydrolysis. During the discharge stage, the discharge hole 19 is aligned with the discharge pipe 16 and the tilt angle of the tank is adjusted to achieve rapid and complete discharge of materials, avoid material residue in the tank, and prevent cross-contamination between batches.

[0026] Example 3 Reference Figure 1 - Figure 7 As shown, this embodiment combines the technical content of Embodiment 1 and Embodiment 2 to form the following enzymatic hydrolysis method for rice starch lipid substitute, including the following steps: Step 1: In the slurry feeding process, rice starch and deionized water are mixed according to a preset solid-liquid ratio to prepare starch milk. At the same time, drive motor A drives the baffle ring 12 to rotate, so that the feed hole of the top sealing plate 15 is coaxially aligned with the feed pipe 11. The prepared starch milk is quantitatively delivered to the enzymatic reaction chamber inside the enzymatic hydrolysis tank 4 through the feed pipe 11. After the feeding is completed, drive motor A drives the baffle ring 12 to rotate, so that the feed hole and the feed pipe 11 are misaligned, thus completing the sealing and isolation of the reaction chamber. Step 2: Constant-temperature enzymatic hydrolysis process. Drive motors A and B are started, driving the main rotating rod 9 to drive the baffle ring 12 and the spiral heat pipe 13, and the auxiliary rotating drum 10 to drive the rotating fan plate 14 to rotate at preset differential speed parameters. At the same time, a constant-temperature heat exchange medium at a preset temperature is continuously introduced into the spiral heat pipe 13 to perform immersion constant-temperature heat exchange on the starch milk in the enzymatic hydrolysis reaction chamber, stabilizing the system temperature within the optimal reaction temperature range of amylase. Simultaneously, a preset amount of amylase preparation is quantitatively and uniformly sprayed into the reaction chamber through the enzyme addition ring pipe 22. The amylase preparation is rapidly and uniformly mixed with the starch milk under the stirring action of the rotating fan plate 14. The controlled enzymatic hydrolysis reaction of rice starch is carried out in a constant-temperature environment to prepare a rice starch dextrin system with a specific chain length distribution. During the enzymatic hydrolysis reaction, the enzymatic hydrolysis tank 4 can be adjusted to a preset tilt angle by the coordinated action of cylinder 7 and cylinder 18 to optimize the material flow field distribution and further improve the uniformity of stirring and heat exchange. Step 3: Enzyme inactivation termination process. When the enzymatic hydrolysis reaction reaches the preset reaction time and target value, the circulation of the room temperature heat exchange medium is stopped, and a high temperature heat exchange medium is quickly introduced into the spiral heat exchange tube 13. With the rotation of the spiral heat exchange tube 13 and the high-speed stirring of the rotating fan plate 14, the enzymatic hydrolysis system is rapidly heated to the enzyme inactivation temperature and kept at the preset temperature for a preset time. After the amylase is inactivated, the enzymatic hydrolysis reaction is terminated. Step 4: Post-discharge processing. After enzyme inactivation, the solenoid valve 17 is opened, and the enzymatically hydrolyzed material is quickly discharged from the enzymatic hydrolysis tank 4 through the discharge hole 19 and the discharge pipe 16. For the material remaining in the tank, the enzymatic hydrolysis tank 4 is deflected to a large-angle discharge position by adjusting the frame structure to completely discharge the material remaining in the tank. After the discharged material is processed by subsequent cooling, centrifugation to remove impurities, spray drying and other processes, the finished rice starch fat substitute product is obtained.

[0027] In summary, this invention, on the one hand, constructs an immersive dynamic differential heat exchange stirring system consisting of a grid ring 12 rotating with the main rotating rod 9 and a spiral heat pipe 13 fixed to its inner wall, and a rotating fan plate 14 rotating independently with the auxiliary rotating cylinder 10. This completely reconstructs the heat transfer path of traditional jacketed heat exchange, achieving immersive direct full-contact heat exchange between the heat exchange medium and the material. This eliminates the radial temperature gradient inside the vessel from the root, avoiding problems such as starch coking and premature deactivation of amylase caused by local overheating. At the same time, the differential rotation of the two components creates a continuous sweeping effect on the wall of the spiral heat pipe 13, enhancing the turbulence on the heat exchange surface, improving heat exchange efficiency and temperature field uniformity, and ensuring the stability and controllability of the rice starch enzymatic hydrolysis reaction. On the other hand, a complete enzymatic hydrolysis process control system is constructed, consisting of a closed independent enzymatic hydrolysis reaction chamber formed by two sets of sealing plates 15 and a grid ring 12, an enzyme addition ring pipe 22 with enzyme evenly distributed at the bottom, an adjustable tilt frame structure composed of a support plate 2, a deflection frame 3, cylinder 1 7 and cylinder 2 18, and a vacuum outer protective jacket 5 covering the outside of the enzymatic hydrolysis tank 4. This system effectively suppresses axial back-mixing of materials, achieves rapid and uniform mixing of enzyme preparations and materials to ensure the uniformity of the degree of enzymatic hydrolysis. At the same time, the tilt angle of the enzymatic hydrolysis tank 4 can be flexibly adjusted by adjusting the frame structure, which can optimize the material flow field distribution during the reaction process, eliminate the stirring dead zone, and achieve rapid and complete discharge of materials to avoid cross-contamination between batches.

[0028] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

[0029] In the description of this specification, references to terms such as "an embodiment," "example," and "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An enzymatic hydrolysis device for rice starch lipid substitute, characterized in that, include: Enzymatic hydrolysis tank (4); A baffle ring (12) is rotatably mounted on the inner wall of the enzymatic hydrolysis tank (4), and a spiral temperature tube (13) is installed on the inner wall of the baffle ring (12). A rotating fan plate (14) is coaxially rotatably disposed in the middle of the baffle ring (12), and the rotating fan plate (14) has a gap for the baffle ring (12) and the spiral temperature tube (13) to pass through; A sealing plate (15) is set at the top and bottom of the baffle ring (12) and the rotating fan plate (14), and the sealing plate (15) at the top is rotatably connected to the enzymatic hydrolysis tank (4); The adjustment frame structure includes a support plate (2) and a deflection frame (3). The bottom of the deflection frame (3) is hinged to the support plate (2). The enzymatic hydrolysis tank (4) is vertically installed on the deflection frame (3). An actuator is installed on the support plate (2). The actuator is used to adjust the tilt angle of the enzymatic hydrolysis tank (4).

2. The enzymatic hydrolysis device for rice starch lipid substitute according to claim 1, characterized in that, The enzymatic hydrolysis tank (4) is rotatably mounted with a main rotating rod (9) and a secondary rotating cylinder (10) in the middle. The main rotating rod (9) and the secondary rotating cylinder (10) are respectively connected to the baffle ring (12) and the rotating fan plate (14).

3. The enzymatic hydrolysis device for rice starch lipid substitute according to claim 2, characterized in that, The upper end of the main rotating rod (9) is provided with a drive motor A, and the outer side of the auxiliary rotating cylinder (10) is provided with an auxiliary drive tooth (21). The auxiliary drive tooth (21) is equipped with a drive motor B and a main drive tooth (20) meshing with it. The drive motor A and drive motor B are used for the rotation of the main rotating rod (9) and the auxiliary rotating cylinder (10), respectively.

4. The enzymatic hydrolysis device for rice starch lipid substitute according to claim 1, characterized in that, The sealing plate (15) at the bottom is provided with a discharge hole (19) for material to fall, and an enzyme addition loop tube (22) runs through the middle of the sealing plate (15) on the lower side. The discharge port of the enzyme addition loop tube (22) faces upward and is evenly distributed.

5. The enzymatic hydrolysis device for rice starch lipid substitute according to claim 1, characterized in that, The adjustment frame structure also includes a base plate (1), a support plate (2) is installed on the upper end of the base plate (1), a sliding block (8) is slidably installed in the middle of the support plate (2), and a cylinder (7) with its output end hinged to the deflection frame (3) is rotatably installed on the upper end of the sliding block (8).

6. The enzymatic hydrolysis device for rice starch lipid substitute according to claim 5, characterized in that, The bottom of the support plate (2) is equipped with a cylinder two (18) facing outward. The output end of the cylinder two (18) is connected to the sliding block (8) to adjust the horizontal position of the sliding block (8).

7. The enzymatic hydrolysis device for rice starch lipid substitute according to claim 6, characterized in that, The bottom of the enzymatic hydrolysis vessel (4) is covered with an outer protective sleeve (5). The outer protective sleeve (5) and the enzymatic hydrolysis vessel (4) are in a vacuum state. The enzymatic hydrolysis vessel (4) is connected to the deflection frame (3) through the outer protective sleeve (5).

8. The enzymatic hydrolysis device for rice starch lipid substitute according to claim 1, characterized in that, The top of the enzymatic hydrolysis tank (4) is equipped with a tank cover (6), and a through hole is provided on the sealing plate (15) at the top. A feed pipe (11) that is intermittently connected to the through hole is installed on the tank cover (6).

9. The enzymatic hydrolysis device for rice starch lipid substitute according to claim 1, characterized in that, The lower end of the enzymatic hydrolysis tank (4) is equipped with a feed pipe (16), and a solenoid valve (17) for feed control is installed on the feed pipe (16).

10. A method for enzymatic hydrolysis of rice starch as a lipid substitute, characterized in that, The process is achieved using an enzymatic hydrolysis device for rice starch lipid substitutes as described in any one of claims 1-9, comprising the following steps: Step 1: Slurry feeding process. After the prepared starch milk is quantitatively fed into the enzymatic reaction chamber inside the enzymatic hydrolysis tank (4), the drive motor A drives the baffle ring (12) to rotate, so that the feed through hole and the feed pipe (11) are misaligned, and the reaction chamber is sealed and isolated. Step 2: Constant temperature enzymatic hydrolysis process. Start drive motor A and drive motor B to drive the main rotating rod (9) to drive the baffle ring (12) and the spiral heat pipe (13), and the auxiliary rotating drum (10) to drive the rotating fan plate (14) to rotate at the preset differential speed parameters. At the same time, a constant temperature heat exchange medium is continuously introduced into the spiral heat pipe (13) to immerse the starch milk in the enzymatic hydrolysis reaction chamber for constant temperature heat exchange. Simultaneously, a preset amount of amylase preparation is quantitatively and evenly sprayed into the reaction chamber through the enzyme addition ring pipe (22). Under the stirring action of the rotating fan plate (14), the amylase preparation is quickly and evenly mixed with the starch milk and produces a controllable enzymatic hydrolysis reaction to obtain the rice starch dextrin system. Step 3: Enzyme inactivation termination process. When the enzymatic hydrolysis reaction reaches the preset reaction time and target value, stop the circulation of the room temperature heat exchange medium and quickly introduce the high temperature heat exchange medium into the spiral heat exchange tube (13). With the rotation of the spiral heat exchange tube (13) and the high-speed stirring of the rotating fan plate (14), the enzymatic hydrolysis system is rapidly heated to the enzyme inactivation temperature and kept at the preset temperature for a preset time. After the amylase is inactivated, the enzymatic hydrolysis reaction is terminated. Step 4: Post-discharge processing. After enzyme inactivation is completed, the solenoid valve (17) is opened, and the enzymatically hydrolyzed material is quickly discharged from the enzymatic hydrolysis tank (4). After subsequent cooling, centrifugation to remove impurities and spray drying, the discharged material is processed to obtain the finished rice starch substitute product.

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