Decolorization apparatus for preparing resistant dextrin based on plant starch

Abstract

This invention discloses a decolorization device for preparing resistant dextrin based on plant starch, belonging to the field of pressure filtration technology. It includes a preparation tank for decolorization, consisting of an outer tank and a lid. Inside the outer tank is a pressure filtration conveyor seat, which in turn has a pressure filtration impact seat. Within the pressure filtration impact seat is a piston-type pressure filtration component connected to a mixing vertical shaft via a movable part. This invention utilizes a built-in floating airbag within a mating ring to ensure the inlet of the feeding and discharging channel always follows the liquid level downwards, ensuring that the uppermost layer of clear liquid is always drawn. A push rod drives the multi-layer filtration assembly to precisely move to the feeding and discharging channel position. During discharge, the clear liquid sequentially passes through the multi-layer filtration assembly for high-pressure fine filtration, effectively trapping residual activated carbon and ensuring that the clear liquid is preferentially filtered and discharged. The high-concentration activated carbon slurry at the bottom is finally filtered, collected, and treated separately, preventing activated carbon from clogging the filter media or mixing with the product, thus greatly improving filtration efficiency and activated carbon recovery rate.

Description

Technical Field

[0001] This invention relates to the field of pressure filtration technology, and more particularly to a decolorization apparatus for preparing resistant dextrin based on plant starch. Background Technology

[0002] Decolorization of resistant dextrin is a crucial step in its production process, directly affecting the color, purity, sensory quality, and application range of the final product. During the dextrinization reaction, resistant dextrin produces various colored impurities. Furthermore, the resistant dextrin particles become denser and more viscous after absorbing water and swelling. When decolorizing with activated carbon, the activated carbon, being relatively light before adsorption, often separates into layers with the resistant dextrin solution, making mixing difficult through stirring. This uneven mixing leads to low decolorization efficiency. After decolorization, multiple filtrations are required to separate the activated carbon. After decolorization, the activated carbon becomes heavier and sits at the bottom. Therefore, how to effectively separate the activated carbon from the solution through pressure filtration, achieving efficient and energy-saving filtration, is a pressing problem. Based on this, a decolorization device for preparing resistant dextrin based on plant starch is proposed. Summary of the Invention

[0003] The purpose of this invention is to solve the problems existing in the prior art by proposing a decolorization device for preparing resistant dextrin based on plant starch.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A decolorization device for preparing resistant dextrin based on plant starch includes a preparation tank for decolorization. The preparation tank consists of an outer tank and a tank cover. A filter press conveyor is installed inside the outer tank. A drive motor is installed inside the filter press conveyor. The output end of the drive motor is connected to a mixing vertical shaft. A filter press impact seat is installed above the filter press conveyor. A piston filter press component connected to the mixing vertical shaft via a movable part is installed inside the filter press impact seat. A vortex agitator is fixedly connected to the mixing vertical shaft above the filter press impact seat. A floating conveyor ring is slidably fitted against the inner wall of the outer tank. The floating conveyor ring has a feeding and feeding channel. A multi-layer filter assembly is connected to the floating conveyor ring via a control component. A pressure push rod is provided above the tank cover. The output end of the pressure push rod extends downward through the tank cover and is connected to a floating filter element through an elastic connector. The inner wall of the floating filter element is connected to the mixing vertical shaft through upper and lower floating parts to achieve floating above and below the liquid surface. A mating ring is connected to the top of the floating conveying ring, and a mating filter element is provided at the bottom of the mating ring to cooperate with the floating filter element to achieve a seal.

[0005] As a preferred embodiment, the movable component includes a splined sleeve fixedly disposed on the outer wall of the mixing vertical shaft, and a splined collar fixedly connected to the inner wall of the piston filter press, wherein the splined collar is slidably connected to the splined sleeve.

[0006] As a preferred embodiment, the filter press conveyor seat is provided with a filter press chamber, and the side wall of the filter press chamber is provided with a matching feeding port adapted to the feeding and conveying channel. The piston filter press is located in the filter press chamber and is provided with a one-way filter press port. A one-way valve is provided on the one-way filter press port. The outer wall of the piston filter press is provided with a guide force slider, and the inner wall of the filter press chamber is provided with a reciprocating guide groove that cooperates with the guide force slider.

[0007] As a preferred embodiment, the control component includes an annular opening that is formed inside the floating conveyor ring and communicates with the loading and unloading channel. Multiple filter frames are arranged inside the annular opening, and the multi-layer filter assembly is located inside the filter frames. Adjacent filter frames are connected by connecting rings.

[0008] As a preferred embodiment, a control push rod is provided above the floating conveying ring, and a linkage inclined plate is provided on the connecting ring. The output end of the control push rod passes through the annular opening and is fixedly connected to an inclined pressure plate. The inclined pressure plate is slidably connected to the spherical groove on the linkage inclined plate through a connecting ball.

[0009] As a preferred embodiment, the elastic connector includes an inner fixed ring connected to the filter element via multiple support rods, the inner fixed ring being rotatably connected to a rotating pressure ring, and the rotating pressure ring being connected to the output end of the pressure push rod via a spring column.

[0010] As a preferred embodiment, the upper and lower floating components include a curved groove guide ring fixedly disposed on the outer wall of the mixing vertical shaft, and the inner wall of the filter component is connected with upper and lower floating rings that cooperate with the curved groove guide ring. Under the rotation of the curved groove guide ring, the upper and lower floating rings can move up and down.

[0011] As a preferred embodiment, the mating filter element includes an adapter funnel cover connected to a mating ring, and the adapter funnel cover and the bottom of the floating filter element are provided with a filter cover that cooperates with each other to achieve a seal.

[0012] As a preferred embodiment, the mixing vertical shaft is provided with a vertical connecting storage groove, and the inner wall of the vertical connecting storage groove is provided with a foldable stirring blade that can be folded and stored.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention, through the use of a built-in floating airbag, ensures that the inlet of the feeding and conveying channel always follows the liquid level as it descends, guaranteeing that the clear liquid from the top layer is always drawn. By controlling the push rod, the multi-layer filter assembly is precisely moved to the feeding and conveying channel position. During discharge, the clear liquid passes through the multi-layer filter assembly in sequence for high-pressure fine filtration, effectively trapping residual activated carbon and ensuring that the clear liquid is filtered and discharged first. The high-concentration activated carbon slurry that settles at the bottom is finally filtered, collected, and treated separately, avoiding activated carbon clogging the filter media or mixing with the product, thus greatly improving filtration efficiency and activated carbon recovery rate.

[0014] 2. In the mixing process, the mixing vertical shaft drives the floating filter element to move up and down through the curved groove guide ring, actively "sweeping" the liquid surface, effectively collecting and filtering insoluble activated carbon particles and other light impurities floating on the solution surface, thereby improving the purity of the solution.

[0015] 3. This invention can automatically expand / retract according to the position of the floating ring, ensuring full contact with the solution during stirring and avoiding interference during filtration. It solves the problems of activated carbon easily separating due to its specific gravity in viscous resistant dextrin solutions and uneven mixing with conventional stirring. The vortex stirring plate generates strong vortex mixing. During the rotation and up-and-down movement of the piston filter element, the upper layer (containing more activated carbon) of liquid is drawn into the filter chamber through pressure suction, and then sprayed back to the lower part of the tank under high pressure through the dispersion hole, forming a self-circulating enhanced mixing, which significantly improves the contact efficiency and decolorization effect between activated carbon and solution. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the assembly structure of the decolorization device for preparing resistant dextrin based on plant starch proposed in this invention; Figure 2 This is a schematic cross-sectional view of the decolorization device for preparing resistant dextrin based on plant starch proposed in this invention. Figure 3 for Figure 2 Enlarged structural diagram at point A; Figure 4 This is a schematic diagram of the control components in the decolorization device for preparing resistant dextrin based on plant starch proposed in this invention. Figure 5 This is a schematic diagram of the upper and lower floating parts and the matching filter elements in the decolorization device for preparing resistant dextrin based on plant starch proposed in this invention; Figure 6 This is a schematic diagram of the internal structure of the filter press chamber in the decolorization device for preparing resistant dextrin based on plant starch proposed in this invention.

[0017] In the diagram: 1. Outer tank; 2. Tank cover; 3. Filter press conveyor seat; 4. Drive motor; 5. Mixing vertical shaft; 6. Filter press impact seat; 7. Piston filter press component; 8. Vortex agitator; 9. Floating conveyor ring; 10. Feeding and unfeeding channel; 11. Multi-layer filter assembly; 12. Pressure push rod; 13. Floating filter component; 14. Fitting ring; 15. Splined sleeve; 16. Splined collar; 17. Filter press chamber; 18. One-way valve; 19. Filter frame; 20. Connecting ring; 21. Control push rod; 22. Linkage inclined plate; 23. Inclined pressure plate; 24. Support rod; 25. Rotating pressure ring; 26. Curved groove guide rail ring; 27. Upper and lower floating rings; 28. Adaptive funnel cover; 29. ​​Filter cover; 30. Folded stirring blade; 31. Reciprocating guide chute; 32. Drainage control valve. Detailed Implementation

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

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] Example, refer to Figures 1 to 6A decolorization device for preparing resistant dextrin based on plant starch includes a preparation tank for decolorization. The preparation tank consists of an outer tank 1 and a tank cover 2. The connection between the outer tank 1 and the tank cover 2 is a conventional connection method and is existing technology, which will not be described in detail here. A filter press conveyor 3 is set inside the outer tank 1. A drive motor 4 is set inside the filter press conveyor 3. The output end of the drive motor 4 is connected to a mixing vertical shaft 5. A vertical connection and receiving groove is opened on the mixing vertical shaft 5. The inner wall of the receiving tank is provided with a foldable stirring blade 30 that can be folded and stored. The foldable stirring blade 30 is rotatably connected to the vertically connected receiving tank and is connected by a torsion spring. This ensures that the foldable stirring blade 30 can be in a horizontal state when no force is applied. This setting enables the foldable stirring blade 30 to be automatically stored when the upper and lower floating rings 27 move downward and squeeze them to rotate downward. When the upper and lower floating rings 27 move upward, they will rotate the foldable stirring blade 30 upward. A filter press impact seat 6 is provided above the filter press conveyor seat 3. A piston filter press component 7 is provided inside the filter press impact seat 6 and is connected to the mixing vertical shaft 5 through a movable part. Further, the movable part includes a spline sleeve 15 fixedly provided on the outer wall of the mixing vertical shaft 5. A spline collar 16 is fixedly connected to the inner wall of the piston filter press component 7. The spline collar 16 and the spline sleeve 15 are slidably connected.

[0021] By using movable parts, the spline collar 16 and spline sleeve 15 are slidably connected, which can also transmit the rotational force generated by the mixing vertical shaft 5 to the piston filter element 7. The outer wall of the piston filter press 7 is provided with a guide force slider, and the inner wall of the filter press chamber 17 is provided with a reciprocating guide groove 31 that cooperates with the guide force slider. When the piston filter press 7 rotates, the guide force slider provided on its outer wall will drive the piston filter press 7 to move up and down continuously under the action of the reciprocating guide groove 31, so that the piston filter press 7 can achieve both up and down movement and rotation.

[0022] Furthermore, a filter press chamber 17 is provided inside the filter press conveyor seat 3. The top of the filter press chamber 17 is densely covered with dispersion holes. The side wall of the filter press chamber 17 is provided with a matching feeding port that is compatible with the feeding and conveying channel 10. The matching feeding port is compatible with the feeding and conveying channel 10, and the two can be connected to achieve the effect of conveying the starch mixture liquid from top to bottom. The piston filter press 7 is located inside the filter press chamber 17. A one-way filter port is provided on it. A one-way valve 18 is provided on the one-way filter port. The one-way valve 18 can only achieve the effect of conveying the liquid upward. The further advantage of the above is that when the piston filter element 7 moves upward and the one-way valve 18 is closed, the upward suction force generated by the piston filter element 7 will create suction on the feeding and conveying channel 10. Under the action of suction, the mixture in the upper layer (containing more activated carbon in the early stage) is drawn into the filter chamber 17 through the feeding and conveying channel 10. When the piston filter element 7 moves downward, since the height end of the feeding and conveying channel 10 is much greater than the space pressure above the piston filter element 7, under the action of atmospheric pressure, the mixture absorbed below the filter chamber 17 will be transported from the one-way filter port to the space above the piston filter element 7. When the piston filter element 7 moves upward again, the liquid will be uniformly and high-pressurely sprayed into the preparation tank through the dispersion hole to achieve full mixing with the starch mixture in the lower layer and improve the stirring efficiency.

[0023] Above the filter press impact seat 6 is a vortex agitator 8 fixedly connected to the mixing vertical shaft 5. When the vortex agitator 8 is driven to rotate, it will generate a vortex stirring effect on the mixture. A floating conveyor ring 9 is slidably installed on the inner wall of the outer tank 1. A drain control valve 32 is opened on the outer tank 1. The drain control valve 32 is connected to the bottom of the floating conveyor ring 9 through a telescopic pipe. The telescopic pipe is in communication with the feeding and unloading channel 10. When draining, it is only necessary to control the opening of the drain control valve 32 to achieve outward draining. A feeding and unloading channel 10 is opened inside the floating conveyor ring 9. The floating conveyor ring 9 is connected to a multi-layer filter assembly 11 through a control component. It should be noted that, under the action of the control unit, the multi-layer filter assembly 11 can be rotated in the annular opening. During the stirring process, the multi-layer filter assembly 11 and the feeding and unloading channel 10 are in a misaligned state, and the multi-layer filter assembly 11 will not function. At this time, the upper liquid will be directly conveyed downward through the feeding and unloading channel 10. When the liquid is being filtered and discharged, the multi-layer filter assembly 11 can be moved to the feeding and discharging channel 10 by the control component. At this time, the liquid being discharged will pass through the multi-layer filter assembly 11 to achieve high-pressure filtration, effectively absorb the decolorized activated carbon, and then discharge it, thus achieving the effect of fully filtering the activated carbon. Furthermore, the control component includes an annular opening that is opened inside the floating conveying ring 9 and communicates with the feeding and unloading channel 10. Multiple filter frames 19 are provided inside the annular opening, and the multi-layer filter assembly 11 is located inside the filter frames 19. Adjacent filter frames 19 are connected by a connecting ring 20, wherein the connecting ring 20 is hollow and will not affect the connectivity of the feeding and unloading channel 10 during the mixing stage. A control push rod 21 is provided above the floating conveyor ring 9, and a linkage inclined plate 22 is provided on the connecting ring 20. The output end of the control push rod 21 passes through the annular opening and is fixedly connected to the inclined pressure plate 23. The inclined pressure plate 23 is slidably connected to the spherical groove on the linkage inclined plate 22 through the connecting ball. During the up and down movement of the control push rod 21, the inclined pressure plate 23 drives the linkage inclined plate 22 to rotate.

[0024] A pressure push rod 12 is provided above the can lid 2. The output end of the pressure push rod 12 extends downward through the can lid 2 and is connected to the floating filter element 13 through an elastic connector. Furthermore, the elastic connector includes an inner fixed ring connected to the floating filter element 13 through multiple support rods 24. The inner fixed ring is rotatably connected to a rotating pressure ring 25. The rotating pressure ring 25 is connected to the output end of the pressure push rod 12 through a spring column. The connection method of the spring column can meet the movement of the upper and lower floating elements.

[0025] The inner wall of the filter element 13 is connected to the mixing vertical shaft 5 via upper and lower floating parts to achieve floating above and below the liquid surface. Further, the upper and lower floating parts include a curved groove guide ring 26 fixedly installed on the outer wall of the mixing vertical shaft 5. The bottom of the curved groove guide ring 26 has a vertical opening to allow the filter element 13 to move downward. The inner wall of the filter element 13 is connected to upper and lower floating rings 27 that cooperate with the curved groove guide ring 26. With the rotation of the curved groove guide ring 26, the upper and lower floating rings 27 can move up and down. Under the driving action of the upper and lower floating rings 27, the filter element 13 will move up and down. During the up and down movement of the filter element 13, some water-insoluble activated carbon and mixed liquid impurities floating on the surface will be floated and collected. The floating impurities will achieve the filtration effect under the action of the filter cover 29.

[0026] The top of the floating conveying ring 9 is connected to a mating ring 14. The mating ring 14 has a built-in floating airbag to ensure that it can gradually float up to the lower opening and align with the mating feed port after the mixture is added. The bottom of the mating ring 14 is provided with a mating filter element that cooperates with the floating filter element 13 to achieve a seal. The mating filter element includes an adapter funnel cover 28 connected to the mating ring 14. The adapter funnel cover 28 and the bottom of the floating filter element 13 are provided with filter covers 29 that cooperate with each other to achieve a seal. During the downward pressure filtration and liquid discharge process, the two sets of filter covers 29 are in close contact with each other, and the staggered filter holes on them will achieve mutual sealing, thereby enabling the normal operation of pressure filtration and liquid discharge.

[0027] During the mixing stage, the mixing vertical shaft 5 driven by the drive motor 4 rotates the vortex stirring disk 8 connected to the mixing vertical shaft 5, continuously stirring the mixed liquid continuously input into the outer tank 1. During this process, the rotation of the mixing vertical shaft 5 drives the piston filter element 7 connected to it through the spline sleeve 15 and spline ring 16 to rotate. Under the rotation of the piston filter element 7, it moves up and down due to the action of the reciprocating guide groove 31 set in the filter press impact seat 6. The suction force generated can absorb the previous mixed liquid into the feeding and conveying channel 10, and then concentrate it through the dispersion hole of the filter press impact seat 6 and spray it evenly and under high pressure into the preparation tank, so as to fully mix it with the starch mixed liquid in the lower layer and improve the stirring efficiency. Furthermore, during the stirring process, the rotation of the mixing vertical shaft 5 will cause the upper and lower floating rings 27 to move up and down. Under the driving action of the upper and lower floating rings 27, the filter element 13 will move up and down. During the up and down movement of the filter element 13, some water-insoluble activated carbon and impurities in the mixed liquid floating on the surface will be floated. When filtering out the decolorized activated carbon, allow it to settle (the heavier activated carbon settles at the bottom). At this time, control push rod 21 moves the connected float filter element 13 downwards. As the float filter element 13 moves downwards, it engages with the bottom adapter funnel cover 28, sealing the upper layer of the mixture. Simultaneously, as control push rod 21 moves downwards, it compresses the movable outer mating ring 14 and its connected floating conveying ring 9, causing them to move downwards. At this point, the multi-layer filter assembly 11 within the annular opening is positioned within the feeding and unloading channel 10. When the mating ring 14 moves downwards, it causes… The bottom of the feeding and conveying channel 10 is misaligned with the feeding port to achieve a seal. At this time, the drain control valve 32 is opened. Under the pressure of the downward movement inside, the uppermost clear liquid will be gradually discharged from the feeding and conveying channel 10. The multi-layer filter assembly 11 located in the feeding and conveying channel 10 can clean the mixed liquid. As the liquid level continues to decrease with the continuous conveying, the feeding and conveying channel 10 will follow the liquid level to decrease. Under this operation, it can ensure that the clear liquid is filtered and conveyed at all times. The activated carbon liquid at the bottom is finally filtered and collected, and then subjected to pressure filtration, thereby ensuring efficient filtration and full treatment of activated carbon.

[0028] 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 decolorization apparatus for preparing resistant dextrin based on plant starch, comprising a preparation tank for decolorization, characterized in that, The preparation tank consists of an outer tank (1) and a tank cover (2). The outer tank (1) is equipped with a filter press conveyor seat (3). The filter press conveyor seat (3) is equipped with a drive motor (4). The output end of the drive motor (4) is connected to a mixing vertical shaft (5). The filter press conveyor seat (3) is equipped with a filter press impact seat (6). The filter press impact seat (6) is equipped with a piston filter press component (7) connected to the mixing vertical shaft (5) through a movable part. The filter press impact seat (6) is equipped with a vortex agitator (8) fixedly connected to the mixing vertical shaft (5). The inner wall of the outer tank (1) is fitted with a floating conveyor ring (9). The outer tank (1) is equipped with a drain control valve (32). The drain control valve (32) is connected to the bottom of the floating conveyor ring (9) through a telescopic tube. The floating conveyor ring (9) is equipped with a feeding and feeding channel (10). The floating conveyor ring (9) is connected to a multi-layer filter assembly (11) through a control component. A pressure push rod (12) is provided above the tank cover (2). The output end of the pressure push rod (12) extends downward through the tank cover (2) and is connected to a floating filter element (13) through an elastic connector. The inner wall of the floating filter element (13) is connected to the mixing vertical shaft (5) through upper and lower floating parts to achieve floating above and below the liquid surface. A mating ring (14) is connected to the top of the floating conveying ring (9). A mating filter element is provided at the bottom of the mating ring (14) to cooperate with the floating filter element (13) to achieve sealing.

2. The decolorization apparatus for preparing resistant dextrin based on plant starch according to claim 1, characterized in that, The movable component includes a spline sleeve (15) fixedly mounted on the outer wall of the mixing vertical shaft (5), and a spline collar (16) fixedly connected to the inner wall of the piston filter press (7), and the spline collar (16) is slidably connected to the spline sleeve (15).

3. The decolorization apparatus for preparing resistant dextrin based on plant starch according to claim 1, characterized in that, The filter press conveying seat (3) has a filter press chamber (17) inside. The side wall of the filter press chamber (17) has a matching feeding port that is compatible with the feeding and conveying channel (10). The piston filter press (7) is located inside the filter press chamber (17) and has a one-way filter press port. A one-way valve (18) is provided on the one-way filter press port. The piston filter press (7) is provided with a guide force slider on the outer side wall, and the filter press chamber (17) is provided with a reciprocating guide groove (31) that works in conjunction with the guide force slider on the inner wall.

4. The decolorization apparatus for preparing resistant dextrin based on plant starch according to claim 1, characterized in that, The control component includes an annular opening that is opened inside the floating conveying ring (9) and connected to the feeding and unloading channel (10). Multiple filter frames (19) are provided inside the annular opening. The multi-layer filter assembly (11) is located inside the filter frames (19). Adjacent filter frames (19) are connected by a connecting ring (20).

5. The decolorization apparatus for preparing resistant dextrin based on plant starch according to claim 4, characterized in that, A control push rod (21) is provided above the floating conveying ring (9), and a linkage inclined plate (22) is provided on the connecting ring (20). The output end of the control push rod (21) passes through the annular opening and is fixedly connected to the inclined pressure plate (23). The inclined pressure plate (23) is slidably connected to the spherical groove on the linkage inclined plate (22) through a connecting ball.

6. The decolorization apparatus for preparing resistant dextrin based on plant starch according to claim 1, characterized in that, The elastic connector includes an inner fixed ring connected to the filter element (13) via multiple support rods (24), and the inner fixed ring is rotatably connected to a rotating pressure ring (25), which is connected to the output end of the pressure push rod (12) via a spring column.

7. The decolorization apparatus for preparing resistant dextrin based on plant starch according to claim 1, characterized in that, The upper and lower floating components include a curved groove guide ring (26) fixedly installed on the outer wall of the mixing vertical shaft (5). The inner wall of the filter element (13) is connected to an upper and lower floating ring (27) that cooperates with the curved groove guide ring (26). Under the rotation of the curved groove guide ring (26), the upper and lower floating ring (27) can move up and down.

8. The decolorization apparatus for preparing resistant dextrin based on plant starch according to claim 1, characterized in that, The mating filter element includes an adapter funnel cover (28) connected to the mating ring (14), and the adapter funnel cover (28) and the bottom of the floating filter element (13) are provided with a filter cover (29) that cooperates with each other to achieve a seal.

9. The decolorization apparatus for preparing resistant dextrin based on plant starch according to claim 1, characterized in that, The mixing vertical shaft (5) is provided with a vertical connecting storage groove, and the inner wall of the vertical connecting storage groove is provided with a foldable stirring blade (30) that can be folded and stored.

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