Preparation method and device of citrus fibers with high water binding capacity

Abstract

The invention discloses a preparation method and device of high-water-binding-capacity citrus fibers, and relates to the technical field of citrus fiber preparation, the device comprises a shell, a rotating disc and a grinding disc are arranged in the shell, the rotating disc is rotationally connected in the shell to smash citrus peels, the grinding disc is rotationally connected in the shell to grind the citrus peels, and the grinding disc is rotationally connected in the shell to grind the citrus peels. The grinding disc is located at the bottom of the rotating disc, a two-stage transmission mechanism is arranged at the output end of the motor, the two-stage transmission mechanism has a first state and a second state, in the first state, the motor drives the rotating disc to rotate at a first speed through the two-stage transmission mechanism, and in the second state, the motor drives the rotating disc to rotate at a second speed through the two-stage transmission mechanism. And the motor drives the rotating disc and the grinding disc to rotate at a second speed through a two-stage transmission mechanism. According to the preparation method and device of the high-water-binding-capacity citrus fiber, the rotating speed of the rotating disc and the rotating speed of the grinding disc are adaptively adjusted under the condition that the power of a motor is not changed, and then the purpose of saving energy is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of citrus fiber preparation, and in particular to a preparation method and device of citrus fiber with high water holding capacity. Background Art

[0002] Citrus fiber is a natural plant fiber extracted from citrus fruits (such as oranges, lemons, grapefruits, etc.). This fiber is rich in dietary fiber and has a variety of potential health benefits. Citrus fiber can be used in the food industry as a thickener, emulsifier or fiber supplement, and is often added to juices, beverages, cakes and other processed foods.

[0003] For example, the patent document with the authorization announcement number CN114365853B and the authorization announcement date November 10, 2023, and the name of the patent document is "A method for preparing antioxidant dietary fiber from citrus peel residue". It uses citrus peel residue as raw material, and first obtains citrus peel residue powder through freeze-drying, low-temperature ultrafine grinding and other technologies, and then uses dynamic high-pressure microfluidization treatment, enzymatic hydrolysis, and high-intensity ultrasonic-assisted alcohol extraction to extract antioxidant dietary fiber, and then the antioxidant dietary fiber extract is vacuum concentrated, recrystallized, and dried to obtain antioxidant dietary fiber.

[0004] In the process of preparing citrus fiber from citrus peel, it is necessary to go through processes such as drying, crushing and enzymatic hydrolysis. For the crushing process, the prior art uses a combination of a rotating tool and a grinding disc to perform a two-stage crushing operation on the material. The rotating tool and the grinding disc have different rotation speeds, and both require two sets of motor structures to drive them. Obviously, this will cause a waste of resources and energy. Summary of the invention

[0005] The purpose of the present invention is to provide a method and device for preparing citrus fiber with high water holding capacity, so as to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A preparation device for high water-holding citrus fiber, comprising a housing, wherein a rotating disk and a grinding disk are arranged in the housing, wherein the rotating disk is rotatably connected in the housing to crush the citrus peel, and the grinding disk is rotatably connected in the housing to grind the citrus peel, wherein the grinding disk is located at the bottom of the rotating disk, and further comprising:

[0008] The motor has a two-stage transmission mechanism at its output end, and the two-stage transmission mechanism has a first state and a second state. In the first state, the motor drives the rotating disk to rotate at a first speed through the two-stage transmission mechanism. In the second state, the motor drives the rotating disk and the grinding disk to rotate at a second speed through the two-stage transmission mechanism, and the first speed is greater than the second speed.

[0009] In the above-mentioned device for preparing citrus fiber with high water holding capacity, the top of the shell is configured with a feed inlet, and the bottom of the shell is configured with a discharge outlet.

[0010] The above-mentioned high water-holding citrus fiber preparation device has a crushing chamber constructed in the shell, a plurality of first hammers are fixed on the rotating disk, a connecting ring is fixed on the inner wall of the crushing chamber, and a plurality of second hammers are constructed on the inner wall of the connecting ring.

[0011] In the above-mentioned device for preparing citrus fiber with high water holding capacity, a grinding chamber is constructed in the shell, an inner grinding disc is embedded in the inner wall of the grinding chamber, and a grinding channel is formed between the grinding disc and the inner grinding disc.

[0012] In the above-mentioned device for preparing citrus fiber with high water holding capacity, the width of the top of the grinding channel is greater than the width of the bottom.

[0013] In the above-mentioned device for preparing high water-holding citrus fiber, a rotating shaft is fixed on the rotating disk, a through groove is constructed on the grinding disk, a lifting block is slidably connected in the shell, and the rotating shaft is inserted in the through groove and rotatably connected to the lifting block.

[0014] In the above-mentioned device for preparing citrus fiber with high water holding capacity, when the lifting block rises, the rotating disk gradually approaches the connecting ring to tend to isolate the crushing chamber and the grinding chamber.

[0015] In the above-mentioned device for preparing citrus fiber with high water holding capacity, a clamping shaft is fixed on the outer wall of the rotating shaft, and a clamping groove adapted to the clamping shaft is constructed on the inner wall of the through groove.

[0016] The above-mentioned device for preparing high water-holding citrus fiber, the two-stage transmission mechanism includes a first driving wheel fixed to the output end of the motor, a second driving wheel is coaxially fixed on the top of the first driving wheel, the diameter of the first driving wheel is larger than the diameter of the second driving wheel, and also includes a first transmission wheel and a second transmission wheel fixed on the rotating shaft, the first transmission wheel is located at the bottom of the second transmission wheel, the first transmission wheel is adapted to the first driving wheel, and the second transmission wheel is adapted to the second driving wheel.

[0017] A method for preparing citrus fiber with high water holding capacity, which is based on any of the above-mentioned preparation devices, and includes enzymatic hydrolysis, drying and pulverizing steps. In the enzymatic hydrolysis step, the enzymatic hydrolysis temperature is 45°C to 55°C, and the enzymatic hydrolysis time is 1-4 hours; in the drying step, the pH value is adjusted to 7 and vacuum drying is performed; in the pulverizing step, the citrus is subjected to a two-stage pulverization operation by the motor and the two-stage transmission mechanism to obtain citrus fiber powder.

[0018] In the above technical scheme, the present invention provides a method and device for preparing high water-holding citrus fiber. Only one set of motors needs to be arranged in the shell to drive the rotating disk and the grinding disk to operate through a two-stage transmission mechanism, thereby achieving the purpose of saving resources; through the first state of the two-stage transmission mechanism, the motor can drive the rotating disk to rotate at a higher speed, so as to utilize the shear force formed by the rotating disk with a higher speed to perform preliminary crushing on the material; through the second state of the two-stage transmission mechanism, the motor can drive the rotating disk and the grinding disk to rotate at a lower speed, thereby obtaining a larger torque, so as to utilize the friction force of the grinding disk on the material to further crush the material, thereby adaptively adjusting the speed of the rotating disk and the grinding disk without changing the motor power, thereby achieving the purpose of energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of the structure of a rotating disk provided in yet another embodiment of the present invention;

[0022] Figure 3 A schematic diagram of a grinding channel structure provided in yet another embodiment of the present invention;

[0023] Figure 4 A schematic diagram of the structure of a lifting block provided in yet another embodiment of the present invention;

[0024] Figure 5 A schematic diagram of a clamping shaft structure provided in yet another embodiment of the present invention;

[0025] Figure 6 A schematic diagram of the overall structure of a rotating shaft provided in yet another embodiment of the present invention;

[0026] Figure 7 A schematic diagram of the structure of a grinding disc provided in yet another embodiment of the present invention;

[0027] Figure 8 A schematic diagram of a discharge channel provided for yet another embodiment of the present invention.

[0028] Description of reference numerals:

[0029] 1. Shell; 2. Rotating disk; 3. Grinding disk; 4. Motor; 5. Feed inlet; 6. Discharge outlet; 7. Crushing chamber; 8. First hammer; 9. Connecting ring; 10. Second hammer; 11. Grinding chamber; 12. Inner grinding disk; 13. Ring plate; 14. Rotating shaft; 15. Lifting block; 16. Lifting slot; 17. Sliding block; 18. Driving member; 19. Clamping shaft; 20. Clamping slot; 21. First driving wheel; 22. Second driving wheel; 23. First transmission wheel; 24. Second transmission wheel; 25. Discharge channel. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] Reference Figure 1-8 An embodiment of the present invention provides a preparation device for citrus fiber with high water holding capacity, comprising a shell 1, wherein a rotating disk 2 and a grinding disk 3 are arranged in the shell 1, wherein the rotating disk 2 is rotatably connected in the shell 1 to crush the citrus peel, and the grinding disk 3 is rotatably connected in the shell 1 to grind the citrus peel, and the grinding disk 3 is located at the bottom of the rotating disk 2 (in the moving direction of the material, the grinding disk 3 is located downstream of the rotating disk 2). The present invention also includes a motor 4, wherein a two-stage transmission mechanism is arranged at an output end thereof, and the two-stage transmission mechanism has a first state and a second state. In the first state, the motor 4 drives the rotating disk 2 to rotate at a first speed through the two-stage transmission mechanism, and in the second state, the motor 4 drives the rotating disk 2 and the grinding disk 3 to rotate at a second speed through the two-stage transmission mechanism, and the first speed is greater than the second speed.

[0032] Specifically, the high water holding capacity of citrus fiber mainly comes from its rich polysaccharide components, such as pectin and cellulose. These components can absorb and retain water, and are widely used in food processing, health products, and cosmetics. In the process of preparing citrus fiber, it is necessary to go through multiple processes such as drying, crushing, and enzymolysis. In the crushing process, the dried citrus peel needs to be crushed to 200-400 mesh to obtain citrus fiber powder; the crushing device for fiber preparation is generally provided with a shearing crushing structure and a grinding crushing structure (such as the patent for a wood fiber grinding device with a grant announcement number of CN118617535B), wherein the shearing crushing structure can preliminarily crush the material, and then the grinding crushing structure can further crush the material to obtain a higher mesh number (that is, a smaller particle size) of citrus fiber powder. The above are all prior art and will not be repeated here. The innovation of the embodiment of the present invention is that a rotating disk 2 and a grinding disk 3 are arranged in a shell 1, and a tool crushing structure can be arranged on the rotating disk 2, so that when the rotating disk 2 rotates, the shear force of the tool crushing structure is used to preliminarily crush the material, and the grinding disk 3 is located downstream of the rotating disk 2, so that when the grinding disk 3 rotates, the friction force of the grinding disk 3 is used to further crush the material; a motor 4 and a two-stage transmission mechanism are also arranged in the shell 1, and the two-stage transmission mechanism can be a combination of two sets of gear transmission structures, and one of the two sets of gear transmission structures is selected to transmit the power of the motor 4, so that the motor 4 can drive the rotating disk 2 to rotate at a first speed (that is, the first state of the two-stage transmission mechanism) through one set of gear transmission structures, or drive the rotating disk 2 and the grinding disk 3 to rotate at a second speed (that is, the second state of the two-stage transmission mechanism) through another set of gear transmission structures; the advantages of such a setting are that, firstly, only one set of motors 4 needs to be arranged in the shell 1 to drive the rotating disk 2 and the grinding disk 3 to operate, which saves resources; secondly, the motor 4 can be The first state of the two-stage transmission mechanism drives the rotating disk 2 to rotate at a relatively high speed (first speed), so as to utilize the shear force formed by the rotating disk 2 with a relatively high speed to perform preliminary crushing of the material; thirdly, the motor 4 can drive the rotating disk 2 and the grinding disk 3 to rotate at a relatively low speed (second speed) through the second state of the two-stage transmission mechanism, thereby obtaining a relatively large torque, so as to utilize the friction force of the grinding disk 3 to further crush the material. During this process, the rotating disk 2 can also rotate at a relatively low speed, so that the rotating disk 2 plays a role similar to that of material selection, and the material at the rotating disk 2 can be avoided as much as possible from agglomerating; fourthly, the speed (torque) of the rotating disk 2 and the grinding disk 3 can be adjusted by switching the state of the two-stage transmission mechanism, and the problem of insufficient speed (torque) of the rotating disk 2 and the grinding disk 3 can be avoided as much as possible, so as to adapt to adjust the speed of the rotating disk 2 and the grinding disk 3 without changing the power of the motor 4, and adapt to adjust the torque of the rotating disk 2 and the grinding disk 3, thereby achieving the purpose of energy saving and efficiency improvement without affecting the crushing of citrus.

[0033] In another embodiment provided by the present invention, further, the top of the shell 1 is configured with a feed port 5, and the bottom of the shell 1 is configured with a discharge port 6. Specifically, a cover plate is provided at both the feed port 5 and the discharge port 6, and materials can be added into the shell 1 through the feed port 5. After the materials enter the shell 1, they are successively crushed by the rotating disk 2 and the grinding disk, and finally discharged through the discharge port 6 at the bottom of the shell 1.

[0034] As an alternative to the knife crushing structure provided on the rotating disk 2, preferably, a crushing chamber 7 is constructed in the shell 1, a plurality of first hammers 8 are fixed on the rotating disk 2, a connecting ring 9 is fixed to the inner wall of the crushing chamber 7, and a plurality of second hammers 10 are constructed on the inner wall of the connecting ring 9. Specifically, the crushing chamber 7 is located above the shell 1, and the upper part of the crushing chamber 7 is connected to the feed port 5; the rotating disk 2 and the connecting ring 9 are coaxially arranged, and the first hammer 8 and the second hammer 10 are opposite to each other on the side thereof as a wedge-shaped surface, and when the rotating disk 2 rotates in the shell 1, the plurality of first hammers 8 rotate relative to the plurality of second hammers 10, so as to preliminarily crush the material put into the shell 1 through the shear force between the two.

[0035] Furthermore, a grinding chamber 11 is constructed in the housing 1 , an inner grinding disc 12 is embedded in the inner wall of the grinding chamber 11 , and a grinding channel is formed between the grinding disc 3 and the inner grinding disc 12 . Specifically, the grinding chamber 11 is located below the shell 1, and the bottom of the grinding chamber 11 is connected to the discharge port 6; in order to further improve the grinding accuracy of the grinding disc 3, an inner grinding disc 12 is embedded in the inner wall of the grinding chamber 11, and the corresponding parts of the grinding disc 3 and the inner grinding disc 12 are both constructed in a cone-like shape, and the outer wall of the grinding disc 3 and the inner wall of the inner grinding disc 12 are both constructed as rough surfaces. The grinding channel formed between the two is also similar to a cone shape, so that the material can move downward to the shell 1 while moving away from the center of the shell 1 when passing through the grinding channel; an annular plate 13 is fixed in the shell 1, and the top of the annular plate 13 is rotatably connected to the bottom of the grinding disc 3, so that the grinding disc 3 can rotate on the annular plate 13 relative to the inner grinding disc 12, thereby grinding the material; the material enters the grinding chamber 11 after being crushed by the rotating disc 2 and other structures in the crushing chamber 7, and in the grinding chamber 11, the grinding disc 3 rotates relative to the inner grinding disc 12 to further grind the crushed material, and the ground material can be discharged through the discharge port 6.

[0036] Preferably, the width of the top of the grinding channel is greater than the width of the bottom. Specifically, in the moving direction of the material in the housing 1, the width of the grinding channel gradually decreases, so that the material crushed by the rotating disk 2 can enter the grinding channel and be gradually ground while passing through the grinding channel, thereby further improving the grinding efficiency and further increasing the mesh size of the citrus fiber powder discharged from the discharge port 6.

[0037] In another embodiment provided by the present invention, further, a rotating shaft 14 is fixed on the rotating disk 2, a through groove is configured on the grinding disk 3, a lifting block 15 is slidably connected in the housing 1, and the rotating shaft 14 is inserted in the through groove and rotatably connected to the lifting block 15. When the lifting block 15 rises, the rotating disk 2 gradually approaches the connecting ring 9 to tend to isolate the crushing chamber 7 and the grinding chamber 11. Specifically, the rotating shaft 14 and the through groove are adapted to each other (both are arranged vertically), so that the rotating shaft 14 can slide or rotate in the through groove; the inner wall of the annular plate 13 is vertically constructed with a lifting groove 16, and a slider 17 is fixed on the lifting block 15, and the slider 17 is slidably connected in the lifting groove 16, so that the lifting block 15 can be lifted and lowered along the lifting groove 16 in the shell 1; a driving member 18 is arranged in the shell 1 to drive the lifting block 15 to rise and fall, and the driving member 18 can select the cylinder or hydraulic cylinder structure in the prior art, one end of the driving member 18 is fixed to the bottom wall in the shell 1, and the other end is fixed to the bottom of the lifting block 15, so as to drive the lifting block 15 to rise and fall along the lifting groove 16 through the driving member 18, and the lifting block 15 is restricted by the lifting groove 16 and cannot rotate on the annular plate 13; when the lifting block 15 rises to the top of its stroke (that is, when the slider 17 slides to the top of the lifting groove 16), the rotating shaft 14 can drive The movable rotating disk 2 rises along the through groove to drive the first hammer head 8 to rise to the position corresponding to the second hammer head 10 (that is, to remain on the same plane), so that the rotating disk 2 can shear and crush the material through the first hammer head 8 and the second hammer head 10 when rotating; in the process of the lifting block 15 rising, the rotating disk 2 gradually approaches the connecting ring 9 until the lifting block 15 rises to the top of its stroke, and the top wall of the rotating disk 2 and the bottom wall of the connecting ring 9 fit together to isolate the crushing chamber 7 and the grinding chamber 11 (the rotating disk 2 and the connecting ring 9 fit together but can rotate relative to each other); when the lifting block 15 descends to the bottom of its stroke, the first hammer head 8 and the second hammer head 10 are misaligned (the two are not at the same height and are misaligned in the vertical direction), and the rotating disk 2 and the connecting ring 9 are separated, so that the crushed material can pass through the gap between the first hammer head 8 and the second hammer head 10 and the gap between the rotating disk 2 and the connecting ring 9 and move to the grinding chamber 11.

[0038] The advantage of such a configuration is that the annular plate 13 can surround the motor 4 and other structures, and the citrus fiber powder in the grinding chamber 11 can be prevented from affecting the operation of the motor 4 and other structures as much as possible; the lifting block 15 and other structures can be set to drive the rotating disk 2 to rise and fall in the crushing chamber 7. When the lifting block 15 rises to the top of its stroke, the first hammer 8 and the second hammer 10 correspond, and the crushing chamber 7 and the grinding chamber 11 can be isolated by the rotating disk 2 and the connecting ring 9, so that the material can be fully sheared and crushed by the first hammer 8 and the second hammer 10 in the crushing chamber 7; when the material is crushed in the crushing chamber 7 for a certain period of time, the lifting block 15 is driven by the driving member 18 to descend to the bottom of its stroke. At this time, the first hammer 8 and the second hammer 10 are misaligned, and the rotating disk 2 and the connecting ring 9 are separated, so that the material in the crushing chamber 7 can enter the grinding chamber 11 for grinding, which can improve the degree of material crushing and maximize the mesh size of the citrus fiber powder.

[0039] Furthermore, a clamping shaft 19 is fixed to the outer wall of the rotating shaft 14, and a clamping groove 20 adapted to the clamping shaft 19 is constructed on the inner wall of the through groove. The two-stage transmission mechanism includes a first driving wheel 21 fixed to the output end of the motor 4, a second driving wheel 22 is coaxially fixed to the top of the first driving wheel 21, the diameter of the first driving wheel 21 is larger than the diameter of the second driving wheel 22, and also includes a first transmission wheel 23 and a second transmission wheel 24 fixed to the rotating shaft 14, the first transmission wheel 23 is located at the bottom of the second transmission wheel 24, the first transmission wheel 23 is adapted to the first driving wheel 21, and the second transmission wheel 24 is adapted to the second driving wheel 22. Specifically, when the lifting block 15 is at the top of its stroke, the rotating shaft 14 rises to drive the clamping shaft 19 and the clamping groove 20 to separate. When the lifting block 15 is at the bottom of its stroke, the rotating shaft 14 descends to drive the clamping shaft 19 to be inserted into the clamping groove 20 (a certain angle needs to be maintained between the clamping shaft 19 and the clamping groove 20 to be inserted appropriately. For this purpose, the top of the clamping groove 20 can be constructed to be open (not shown) so that the clamping shaft 19 can be smoothly inserted into the clamping groove 20), so that the rotating disk 2 and the grinding disk 3 can rotate synchronously and in the same direction; the first driving wheel 21 The first transmission wheel 23 is adapted to the first transmission wheel 23, and both can simultaneously use the gear or friction wheel structure in the prior art; the second driving wheel 22 and the second transmission wheel 24 are adapted to the second transmission wheel 24, and both can simultaneously use the gear or friction wheel structure in the prior art; when the lifting block 15 rises to the top of its stroke, the first transmission wheel 23 and the second transmission wheel 24 rise with the rotating shaft 14, so that the first driving wheel 21 is connected to the first transmission wheel 23 by transmission, and the second driving wheel 22 and the second transmission wheel 24 are separated, so that when the motor 4 rotates, the first driving wheel 21 and the first transmission wheel 24 can be connected to each other by transmission. 23 drives the rotating shaft 14 to rotate, at this time the clamping shaft 19 and the clamping groove 20 are separated, so that the rotating shaft 14 will not drive the grinding disc 3 to rotate when driving the rotating disc 2 to rotate; when the lifting block 15 descends to the bottom of its stroke, the first transmission wheel 23 and the second transmission wheel 24 descend with the rotating shaft 14, so that the first driving wheel 21 is separated from the first transmission wheel 23, and the second driving wheel 22 and the second transmission wheel 24 are connected in transmission, so that the rotating shaft 14 can be driven to rotate through the second driving wheel 22 and the second transmission wheel 24 when the motor 4 rotates, and at this time the clamping shaft 19 is inserted into the The rotating shaft 14 is inserted into the engaging groove 20, so that the rotating shaft 14 can drive the grinding disc 3 to rotate synchronously and in the same direction when driving the rotating disc 2 to rotate; the diameter of the first driving wheel 21 is greater than the diameter of the second driving wheel 22, and the diameter of the second transmission wheel 24 is greater than the diameter of the first transmission wheel 23, so that the motor 4 can drive the rotating disc 2 to rotate at a first speed through the first driving wheel 21 and the first transmission wheel 23 alone, and can also drive the rotating disc 2 and the grinding disc 3 to rotate at a second speed through the second driving wheel 22 and the second transmission wheel 24, and the first speed is greater than the second speed.

[0040] The advantage of such a configuration is that when the height of the rotating shaft 14 and the rotating disk 2 is adjusted by the lifting block 15, the first transmission wheel 23 and the second transmission wheel 24 passively adjust their positions to adjust the state of the two-stage transmission mechanism. When the lifting block 15 moves to the top of its stroke, the first hammer head 8 and the second hammer head 10 correspond, and the rotating disk 2 and the connecting ring 9 fit together to isolate the crushing chamber 7 and the grinding chamber 11. At this time, the first driving wheel 21 and the first transmission wheel 23 are connected in transmission, and the two-stage transmission mechanism is in the first state. The motor 4 drives the rotating disk 2 to rotate at a first speed through the two-stage transmission mechanism, so as to utilize the faster rotating disk 2 to fully shear and crush the material in the crushing chamber 7; when the lifting block 15 moves to the bottom of its stroke, the first hammer head 8 and the second hammer head 10 correspond to each other, and the rotating disk 2 and the connecting ring 9 fit together to isolate the crushing chamber 7 and the grinding chamber 11. The hammer head 10 is misplaced, the rotating disk 2 and the connecting ring 9 are separated, and the crushing chamber 7 and the grinding chamber 11 are connected. At this time, the second driving wheel 22 is connected to the second transmission wheel 24, and the two-stage transmission mechanism is in the second state. The motor 4 drives the rotating disk 2 and the grinding disk 3 to rotate at a second speed through the two-stage transmission mechanism, so as to further grind the material by using the lower rotation speed and larger torque of the grinding disk 3 without changing the power of the motor 4. At the same time, the rotating disk 2 can also move the material in the crushing chamber 7 when rotating at a low speed (the rotating disk 2 also has a certain centrifugal force to make the material tend to move toward the grinding chamber 11), and try to avoid the material in the crushing chamber 7 from agglomerating, so that the material can move smoothly from the crushing chamber 7 to the grinding chamber 11.

[0041] As an alternative to the above-mentioned rotating disk 2 and connecting ring 9 being fitted together to isolate the crushing chamber 7 and the grinding chamber 11, preferably, a discharge channel 25 is formed between the rotating disk 2 and the connecting ring 9, and when the lifting block 15 rises to the top of its stroke, the width of the discharge channel 25 is the same as the width of the upstream end of the grinding channel (or the width of the discharge channel 25 is the same as the width of the middle part of the grinding channel). Specifically, in the above-mentioned embodiment, when the lifting block 15 is at the top of its stroke, the rotating disk 2 and the connecting ring 9 are fitted together to isolate the crushing chamber 7 and the grinding chamber 11. In this embodiment, when the lifting block 15 is at the top of its stroke, there is still a certain space between the rotating disk 2 and the connecting ring 9 to form the discharge channel 25, that is, when the lifting block 15 is at the top of its stroke, the crushing chamber 7 and the grinding chamber 11 are connected through the discharge channel 25 (such as Figure 4As shown). The advantages of such a configuration are that, first, when the rotating disk 2 rotates at the first speed, the material in the crushing chamber 7 is sheared and crushed by the first hammer 8 and the second hammer 10. During the process, the material with a particle size smaller than the discharge channel 25 can directly pass through the discharge channel 25 to enter the grinding chamber 11 in advance (at the same time, the material with a particle size smaller than the grinding channel can also directly pass through the grinding channel), so as to avoid excessive crushing of the material in the crushing chamber 7; in this embodiment, when the rotating disk 2 rotates at the first speed, the rotating disk 2 and the connecting ring 9 are no longer fitted, so that the friction force on the rotating disk 2 can be reduced, and excessive consumption of power of the motor 4 due to excessive friction can be avoided as much as possible; third, when the lifting block 15 descends to the bottom of its stroke, the width of the discharge channel 25 increases (as shown in FIG. 1 ). Figure 8 As shown), the material in the crushing chamber 7 can be smoothly moved to the grinding chamber 11, and the material is prevented from being retained in the crushing chamber 7 as much as possible.

[0042] The present invention also provides a method for preparing citrus fiber with high water holding capacity, which includes enzymolysis, drying and crushing steps. In the enzymolysis step, the enzymolysis temperature is 45°C to 55°C, and the enzymolysis time is 1-4 hours; in the drying step, the pH value is adjusted to 7 and vacuum drying is performed; in the crushing step, the citrus is crushed by any of the preparation devices described above to obtain citrus fiber powder. Specifically, in the process of preparing citrus fiber, the citrus peel is first cut into strips, and then 10 times the amount of water is added and preheated to 50°C; then a composite enzyme is added for enzymolysis to remove non-citrus fiber components in the citrus peel; the conditions for enzymolysis using the composite enzyme are: enzymolysis temperature 45°C to 55°C, enzymolysis time 1-4h; the composite enzyme is compounded by protease, pectinase, and amylase in a certain proportion, and the proportion is 40% pectinase, 30% protease, and 30% amylase; after enzymolysis, the enzymolysis citrus peel is obtained by filtration, and then washed 3 times with water to remove residual composite enzymes; 5-1 0 times the amount of water, preheat to 90 ° C, add citric acid to adjust the pH to 2-4, continue heating for 1 hour and then filter; after filtering, wash the filter residue (citrus peel filter residue) with water until the pH is 7, add 10 times the amount of water, and use sodium hydroxide to adjust the pH to 10-14; after adjusting the pH, heat to 90 ° C for 30 minutes, continue heating at 90 ° C for 1 hour, filter and keep the filter residue for later use; take the filtered filter residue, wash with water to a pH of 7, then filter and vacuum dry; the filter residue (citrus peel filter residue) after vacuum drying is crushed to 200-400 mesh using any of the preparation devices described above to obtain citrus fiber powder.

[0043] The citrus fiber prepared by the method has a good fiber content and better water holding capacity and swelling capacity because the non-fiber components are decomposed and removed by a composite enzyme. The composite enzyme formula has been verified by experiments to be able to effectively decompose protein, starch and pectin in citrus peel. The citrus fiber prepared by the method is an insoluble dietary fiber and can be used in many fields such as food, cosmetics, and beverages. The method crushes the citrus fiber powder to 200-400 meshes, further improving the water holding capacity and swelling capacity of the citrus fiber.

[0044] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A device for preparing high water-holding citrus fiber, comprising a housing, wherein a rotating disk and a grinding disk are arranged in the housing, wherein the rotating disk is rotatably connected in the housing to crush the citrus peel, and the grinding disk is rotatably connected in the housing to grind the citrus peel, wherein the grinding disk is located at the bottom of the rotating disk, and wherein: Also includes: The motor has a two-stage transmission mechanism at its output end, and the two-stage transmission mechanism has a first state and a second state. In the first state, the motor drives the rotating disk to rotate at a first speed through the two-stage transmission mechanism. In the second state, the motor drives the rotating disk and the grinding disk to rotate at a second speed through the two-stage transmission mechanism, and the first speed is greater than the second speed.

2. The device for preparing high water-holding citrus fiber according to claim 1, characterized in that: The top of the shell is configured with a feed inlet, and the bottom of the shell is configured with a discharge outlet.

3. The device for preparing high water-holding citrus fiber according to claim 1, characterized in that: A crushing chamber is constructed in the shell, a plurality of first hammers are fixed on the rotating disk, a connecting ring is fixed on the inner wall of the crushing chamber, and a plurality of second hammers are constructed on the inner wall of the connecting ring.

4. The device for preparing citrus fiber with high water holding capacity according to claim 1, characterized in that: A grinding chamber is constructed in the shell, an inner grinding disc is embedded in the inner wall of the grinding chamber, and a grinding channel is formed between the grinding disc and the inner grinding disc.

5. The device for preparing citrus fiber with high water holding capacity according to claim 4, characterized in that: The width of the top of the grinding channel is greater than the width of the bottom.

6. The device for preparing citrus fiber with high water holding capacity according to claim 3, characterized in that: A rotating shaft is fixed on the rotating disk, a through groove is constructed on the grinding disk, a lifting block is slidably connected in the shell body, and the rotating shaft is inserted in the through groove and rotatably connected with the lifting block.

7. The device for preparing citrus fiber with high water holding capacity according to claim 6, characterized in that: When the lifting block rises, the rotating disk gradually approaches the connecting ring to isolate the crushing chamber from the grinding chamber.

8. The device for preparing citrus fiber with high water holding capacity according to claim 7, characterized in that: A clamping shaft is fixed on the outer wall of the rotating shaft, and a clamping groove adapted to the clamping shaft is constructed on the inner wall of the through groove.

9. The device for preparing citrus fiber with high water holding capacity according to claim 8, characterized in that: The two-stage transmission mechanism includes a first driving wheel fixed to the output end of the motor, a second driving wheel is coaxially fixed on the top of the first driving wheel, the diameter of the first driving wheel is larger than the diameter of the second driving wheel, and also includes a first transmission wheel and a second transmission wheel fixed on the rotating shaft, the first transmission wheel is located at the bottom of the second transmission wheel, the first transmission wheel is adapted to the first driving wheel, and the second transmission wheel is adapted to the second driving wheel.

10. A method for preparing citrus fiber with high water holding capacity, based on the preparation device according to any one of claims 1 to 9, characterized in that: The method comprises enzymolysis, drying and crushing steps. In the enzymolysis step, the enzymolysis temperature is 45° C. to 55° C., and the enzymolysis time is 1-4 hours. In the drying step, the pH value is adjusted to 7 and vacuum drying is performed. In the crushing step, the citrus is crushed in two stages by the motor and the two-stage transmission mechanism to obtain citrus fiber powder.

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