Defibering device for preparing high-concentration nano cellulose based on enzymolysis method

Abstract

The invention provides a defibrating device for preparing high-concentration nano cellulose based on an enzymolysis method.The defibrating device comprises a stirring assembly, a shell and a cover, the stirring assembly comprises a stirring paddle capable of rotating in the first direction, a plurality of first inclined grooves are formed in part of the peripheral face of the stirring paddle, and the shell is provided with an inner cavity, a first opening and a second opening; the shell can move relative to the stirring assembly in the first direction, a plurality of second inclined grooves are formed in the bottom face of the inner cavity, the stirring assembly enters and exits the inner cavity through the first opening, the cover is arranged on the top of the stirring assembly and can move relative to the stirring assembly in the second direction, and a plurality of third inclined grooves are formed in the bottom face of the cover. According to the defibrating device for preparing the high-concentration nano cellulose based on the enzymolysis method, under the auxiliary action of enzyme hydrolysis, materials can be uniformly and efficiently treated in the defibrating process through a multidirectional shearing and friction mechanism, and the problems that defibrating is incomplete and the product size uniformity is poor are solved.

Description

Technical Field

[0001] The invention relates to the technical field of fiber disintegration equipment, and in particular to a fiber disintegration device for preparing high-concentration nanocellulose based on an enzymatic hydrolysis method. Background Art

[0002] Cellulose nanofibers have the advantages of being renewable, biodegradable and biocompatible, making them an environmentally friendly and sustainable material.

[0003] The efficient extraction and defibration of cellulose nanofibers are key steps to achieve their high added value utilization. However, traditional defibration methods face many challenges when dealing with high-concentration materials. In the related art, when using a kneader to defibrate nanofibers, the smooth inner wall of the kneader reduces the friction between the fiber and the inner wall of the kneader, resulting in the fiber being unable to be fully peeled off during the defibration process, resulting in low defibration efficiency. Especially when defibration is performed in a high-concentration defibration system based on enzymatic hydrolysis (cellulose slurry concentration is usually greater than 15%), cellulose will be hydrolyzed with the assistance of enzymatic hydrolysis. As the degree of cellulose hydrolysis and defibration deepens, the fiber volume drops sharply, further exacerbating this problem. At this time, the space utilization rate of the kneader cavity is reduced, and the material cannot form effective contact or friction with the inner wall of the lid of the upper space of the cavity, making the defibration process uneven and the product size uniformity poor, which ultimately affects the quality and yield of nanocellulose. Summary of the invention

[0004] The present invention provides a defibration device for preparing high-concentration nanocellulose based on an enzymatic hydrolysis method, which is used to solve the defects of low defibration efficiency and poor product quality in the prior art, so as to improve the defibration efficiency and product quality.

[0005] The present invention provides a defibrating device for preparing high-concentration nanocellulose based on an enzymatic hydrolysis method, comprising: A stirring assembly, the stirring assembly comprising a stirring paddle that can rotate about a first direction, a plurality of first inclined grooves are provided on a portion of an outer circumferential surface of the stirring paddle, and a first protrusion is formed between two adjacent first inclined grooves; A shell, wherein the shell has an inner cavity, a first opening and a second opening, the shell can move relative to the stirring component along the first direction, a plurality of second inclined grooves are provided on the bottom surface of the inner cavity, a second protrusion is formed between two adjacent second inclined grooves, and the stirring component enters and exits the inner cavity through the first opening; A cover, wherein the cover is arranged on the top of the stirring component and can move relative to the stirring component along a second direction, the second direction is orthogonal to the first direction, the cover can be sealed and connected to the second opening, and a plurality of third inclined grooves are arranged on the bottom surface of the cover, and a third protrusion is formed between two adjacent third inclined grooves.

[0006] In some embodiments, in a first projection plane orthogonal to the second direction, the projection extension direction of at least part of the second oblique groove intersects with the projection extension direction of the first oblique groove; An extension direction of a projection of at least part of the third oblique groove intersects with an extension direction of a projection of the first oblique groove.

[0007] In some embodiments, the stirring paddle includes a first stirring paddle and a second stirring paddle, the first stirring paddle and the second stirring paddle are arranged at intervals along a third direction, the third direction is orthogonal to both the first direction and the second direction, and the first stirring paddle and the second stirring paddle have different rotation speeds.

[0008] In some embodiments, a first recess and a second recess are provided on the bottom surface of the inner cavity and are arranged in sequence along the third direction, and the second inclined groove and the second protrusion are provided on the surface of the first recess and the surface of the second recess.

[0009] In some embodiments, a third recess and a fourth recess are provided on the bottom surface of the cover, and the third inclined groove and the third protrusion are provided on the surface of the third recess and the surface of the fourth recess; The third recess corresponds to the first recess in the second direction, and the first stirring paddle can extend between the first recess and the third recess; The fourth recess corresponds to the second recess in the second direction, and the second stirring paddle can extend between the second recess and the fourth recess.

[0010] In some embodiments, the surface of the first concave portion and the surface of the second concave portion are both arc surfaces, and in a second projection plane orthogonal to the first direction, the projection of the bottom surface of the inner cavity is substantially W-shaped; The surface of the third recessed portion and the surface of the fourth recessed portion are both arc surfaces, and within the second projection plane, the projection of the bottom surface of the cover is substantially M-shaped.

[0011] In some embodiments, the second oblique groove includes a first sub-oblique groove and a second sub-oblique groove arranged in sequence in the third direction, and an extension direction of the first sub-oblique groove intersects an extension direction of the second sub-oblique groove; The third oblique groove includes a third sub-oblique groove and a fourth sub-oblique groove arranged in sequence in the third direction, and an extension direction of the third sub-oblique groove intersects with an extension direction of the fourth sub-oblique groove.

[0012] In some embodiments, the defibrillation device for preparing high-concentration nanocellulose based on enzymatic hydrolysis includes a base, the base is provided with a first slide rail extending along the first direction, the shell is provided with a first slider cooperating with the first slide rail, and the first slider can move relative to the first slide rail along the first direction.

[0013] In some embodiments, the fibrillation device for preparing high-concentration nanocellulose based on enzymatic hydrolysis comprises a second slide rail extending along the second direction, and a second slider is provided on the cover, and the second slider can move relative to the second slide rail along the second direction.

[0014] In some embodiments, the second slide rail is a lead screw, the slider is threadedly connected to the lead screw, and a rotating handle is provided at the top of the lead screw.

[0015] The defibration device for preparing high-concentration nanocellulose based on enzymatic hydrolysis according to the embodiment of the present invention has a first inclined groove and a first protrusion on the working area of ​​the stirring paddle, a second inclined groove and a second protrusion on the bottom surface of the inner cavity, and a third inclined groove and a third protrusion on the bottom surface of the cover. Therefore, when the stirring paddle rotates, the second inclined groove and the second protrusion interact with the first inclined groove and the first protrusion, thereby increasing the friction and shear force applied by the shell and the stirring paddle to the material, thereby improving the defibration effect.

[0016] In addition, the third inclined groove and the third protrusion interact with the first inclined groove and the first protrusion, thereby increasing the friction and shear force exerted by the cover and the stirring paddle on the material and improving the defibration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic structural diagram of a fibrillation device for preparing high-concentration nanocellulose based on an enzymatic hydrolysis method provided by the present invention.

[0019] Figure 2 It is a cross-sectional schematic diagram of a stirring paddle, a shell and a cover of a fibrillation device for preparing high-concentration nanocellulose based on an enzymatic hydrolysis method provided by the present invention.

[0020] Figure 3 yes Figure 2 Schematic diagram of A in the working state.

[0021] Figure 4It is a schematic diagram of the expansion of the surface of the inner cavity of the defibrillation device for preparing high-concentration nanocellulose based on the enzymatic hydrolysis method provided by the present invention.

[0022] Figure 5 yes Figure 4 Cross-sectional view at the middle BB.

[0023] Reference numerals: 1. Stirring assembly; 11. Stirring paddle; 110. First chute; 111. First stirring paddle; 112. Second stirring paddle; 12. Mounting plate; 13. Transmission box; 14. Output shaft; 2. Shell; 20. Inner cavity; 201. First recess; 202. Second recess; 21. Second chute; 211. First sub-chute; 212. Second sub-chute; 22. First slider; 3. Cover; 30. Third chute; 31. Third recess; 32. Fourth recess; 4. Base; 41. First slide rail; 5. Second slide rail; 6. Rotating handle; 7. Guide. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figures 1 to 5 As shown, an embodiment of the present invention discloses a defibration device for preparing high-concentration nanocellulose based on an enzymatic hydrolysis method, comprising a stirring component 1, a shell 2 and a cover 3.

[0026] The stirring assembly 1 comprises a stirring paddle 11 which can rotate in a first direction. A plurality of first inclined grooves 110 are arranged on a part of the outer circumference of the stirring paddle 11 , and a first protrusion is formed between two adjacent first inclined grooves 110 .

[0027] The shell 2 has an inner cavity 20, a first opening and a second opening. The shell 2 can move relative to the stirring component 1 along a first direction. A plurality of second inclined grooves 21 are provided on the bottom surface of the inner cavity 20. A second protrusion is formed between two adjacent second inclined grooves 21. The stirring component 1 enters and exits the inner cavity 20 through the first opening.

[0028] The cover 3 is arranged on the top of the stirring component 1 and can move relative to the stirring component 1 along a second direction, the second direction is orthogonal to the first direction, the cover 3 can be sealed and connected to the second opening, and a plurality of third inclined grooves 30 are provided on the bottom surface of the cover 3, and a third protrusion is formed between two adjacent third inclined grooves 30.

[0029] In order to make the technical solution of the present application easier to understand, the following takes the first direction being consistent with the left-right direction as an example, and the second direction being consistent with the up-down direction as an example, to further describe the technical solution of the present application, wherein the left-right direction and the up-down direction are as follows: Figure 1 shown.

[0030] The axis of the stirring paddle 11 extends in the left-right direction. The outer peripheral surface of the stirring paddle 11 includes a root area adjacent to the axis of the stirring paddle 11 and a working area away from the axis of the stirring paddle 11 . A first inclined groove 110 is provided in the working area.

[0031] A first opening is formed on the left end surface of the shell 2 , and the stirring paddle 11 enters and exits the inner cavity 20 through the first opening.

[0032] The stirring assembly 1 includes a mounting plate 12 and a stirring paddle 11 . When the stirring paddle 11 is in the housing 2 , the mounting plate 12 and the housing 2 can be sealed and connected.

[0033] The housing 2 can move in the left-right direction, and the cover 3 can move in the up-down direction. A second opening is provided on the top surface of the housing 2. When the defibrination device for preparing high-concentration nanocellulose based on enzymatic hydrolysis is working, the cover 3 is sealed and connected to the second opening, and in a non-working state, the cover 3 can move upward to be separated from the second opening. The bottom surface of the cover 3 is the lower surface of the cover 3, and a third chute 30 is provided on the lower surface of the cover 3.

[0034] The number of the first inclined groove 110, the second inclined groove 21 and the third inclined groove 30 are all multiple, and the number of the first protrusion, the second protrusion and the third protrusion are all multiple. The specific number is not limited and can be designed according to actual needs.

[0035] Optionally, the first opening extends upward, and the second opening extends leftward, and the two openings are directly connected at the upper left corner of the shell 2, that is, at the edge where the left end surface of the shell 2 intersects with the top surface.

[0036] The fiber disintegration device for preparing high-concentration nanocellulose of the embodiment of the present invention is mainly used for disintegrating high-concentration cellulose fiber substrate (cellulose slurry concentration is usually greater than 15%) to prepare nanocellulose, and in the process of disintegration, corresponding biological enzymes are added to the cellulose slurry to assist nanofiber disintegration. When the fiber disintegration device for preparing high-concentration nanocellulose based on enzymatic hydrolysis of the embodiment of the present invention is working, the shell 2 is first moved to the left until the stirring paddle 11 completely enters the inner cavity 20, and then the predetermined material is added to the inner cavity 20 through the second opening, and finally the cover 3 is moved downward to seal the inner cavity 20, and finally the stirring paddle 11 is started, and the stirring paddle 11 drives the material to be sheared and rubbed in the inner cavity 20, and finally the fiberized material is obtained.

[0037] During the operation of the defibration device for preparing high-concentration nanocellulose based on enzymatic hydrolysis, the cover 3 can be lowered by a certain distance as required to reduce the distance between the cover 3 and the stirring paddle 11, thereby increasing the friction force on the material.

[0038] When defibration is completed, first stop the rotation of the stirring paddle 11, then move the cover 3 upward to open the second opening, then move the shell 2 to the right to open the first opening, and finally collect the materials attached to the stirring paddle 11 and the materials in the inner cavity 20 in the storage frame.

[0039] In the related art, when a kneader is used to defibrate nanofibers, the smooth inner wall of the kneader reduces the friction between the fibers and the inner wall of the kneader, resulting in the inability to fully peel off the fibers during the defibration process, thus resulting in a low defibration efficiency. Especially when defibration is performed in a high-concentration defibration system (cellulose slurry concentration is usually greater than 15%), as the degree of cellulose hydrolysis and defibration increases, the fiber volume drops sharply, further exacerbating this problem. At this time, the space utilization rate of the kneader cavity is reduced, and the material cannot form effective contact or friction with the inner wall of the cover 3 in the upper space of the cavity, making the defibration process uneven and the product size uniformity poor, which ultimately affects the quality and yield of nanocellulose.

[0040] In the defibrillation device for preparing high-concentration nanocellulose based on enzymatic hydrolysis according to the embodiment of the present invention, since a first inclined groove 110 and a first protrusion are provided on the working area of ​​the stirring paddle 11, a second inclined groove 21 and a second protrusion are provided on the bottom surface of the inner cavity 20, and a third inclined groove 30 and a third protrusion are provided on the bottom surface of the cover 3, when the stirring paddle 11 rotates, the second inclined groove 21 and the second protrusion interact with the first inclined groove 110 and the first protrusion, thereby increasing the friction and shear force applied by the shell 2 and the stirring paddle 11 to the material, and improving the defibrillation effect.

[0041] In addition, the third chute 30 and the third protrusion interact with the first chute 110 and the first protrusion, thereby increasing the friction and shear force exerted by the cover 3 and the stirring paddle 11 on the material, thereby improving the defibration effect.

[0042] As the defibration process progresses, the volume of the material gradually decreases, and the cover 3 can be lowered according to the change in the volume of the material, always maintaining the compaction effect on the material, ensuring that the material always maintains full contact with the cover 3 and the inner wall of the shell 2. This dynamic adjustment mechanism allows the material to be processed more evenly and efficiently during the defibration process, avoiding the situation where the defibration efficiency decreases due to low space utilization in the late stage of defibration.

[0043] The defibration device for preparing high-concentration nanocellulose based on enzymatic hydrolysis according to the embodiment of the present invention enables the material to be processed more evenly and efficiently during the defibration process through this multi-directional shearing and friction mechanism, thus avoiding the problems of incomplete defibration and poor product size uniformity.

[0044] Therefore, the defibration device for preparing high-concentration nanocellulose based on enzymatic hydrolysis according to the embodiment of the present invention is suitable for the defibration process of a high-concentration defibration system and has the advantages of good defibration effect and the like.

[0045] Optionally, a material storage frame is arranged below the stirring paddle 11. When defibration is completed and the stirring paddle 11 is separated from the shell 2, the material on the left side of the inner cavity 20 can fall into the material storage frame, thereby facilitating the collection of the material.

[0046] In some embodiments, in a first projection plane orthogonal to the second direction, an extension direction of a projection of at least a portion of the second oblique groove 21 intersects an extension direction of a projection of the first oblique groove 110 .

[0047] The projection extension direction of at least a portion of the third inclined groove 30 intersects with the projection extension direction of the first inclined groove 110 .

[0048] like Figure 1 As shown, the first projection plane is perpendicular to the up-down direction, the extension direction of the projection of a portion of the second slanted grooves 21 intersects with the extension direction of the projection of a portion of the first slanted grooves 110, and the extension direction of the projection of another portion of the second slanted grooves 21 coincides with or is parallel to the extension direction of the projection of another portion of the first slanted grooves 110. Alternatively, the extension direction of the projection of all the second slanted grooves 21 intersects with the extension direction of the projection of the first slanted grooves 110.

[0049] The extension direction of the projection of a portion of the third slanted grooves 30 intersects with the extension direction of the projection of a portion of the first slanted grooves 110, and the extension direction of the projection of another portion of the third slanted grooves 30 coincides with or is parallel to the extension direction of the projection of another portion of the first slanted grooves 110. Alternatively, the extension direction of the projection of all the third slanted grooves 30 intersects with the extension direction of the projection of the first slanted grooves 110.

[0050] With this arrangement, greater friction and shearing force can be applied to the material between the stirring paddle 11 and the housing 2 , and between the stirring paddle 11 and the cover 3 , thereby improving the defibration effect.

[0051] In some embodiments, the stirring paddle 11 includes a first stirring paddle 111 and a second stirring paddle 112, which are spaced apart along a third direction, the third direction is orthogonal to the first direction and the second direction, and the first stirring paddle 111 and the second stirring paddle 112 have different rotation speeds.

[0052] In order to make the technical solution of the present application easier to understand, the following takes the third direction as an example to further describe the technical solution of the present application, where the front and back directions are as follows: Figure 1 shown.

[0053] The first stirring paddle 111 and the second stirring paddle 112 are arranged sequentially in the front-to-back direction. When the defibrillation device for preparing high-concentration nanocellulose based on enzymatic hydrolysis is working, the first stirring paddle 111 and the second stirring paddle 112 rotate at different speeds. Usually, one stirring paddle 11 has a faster speed and the other stirring paddle 11 has a slower speed, thereby generating slurries of different speeds on the peripheral sides of the two stirring paddles 11, and then enabling the two slurries of different speeds to shear each other so that the slurries are evenly mixed.

[0054] In some embodiments, a first recess 201 and a second recess 202 are sequentially arranged along a third direction on the bottom surface of the inner cavity 20 , and a second inclined groove 21 and a second protrusion are provided on the surface of the first recess 201 and the surface of the second recess 202 .

[0055] For example, Figure 2 As shown, the first recess 201 and the second recess 202 are arranged in sequence in the front-to-back direction, and the first recess 201 is arranged in front of the second recess 202. The first recess 201 and the second recess 202 are both recessed in the direction away from the cover 3. In other words, the first recess 201 and the second recess 202 are both recessed downward. The surface of the first recess 201 and the surface of the second recess 202 are both provided with a second inclined groove 21 and a second protrusion. The second inclined groove 21 in the first recess 201 and the second inclined groove 21 in the second recess 202 can be arranged in the same way or in a different way.

[0056] Therefore, in the defibration device for preparing high-concentration nanocellulose based on enzymatic hydrolysis according to the embodiment of the present invention, the first recess 201 is provided to match the first stirring paddle 111 , and the second recess 202 is provided to match the second stirring paddle 112 .

[0057] In some embodiments, a third recess 31 and a fourth recess 32 are provided on the bottom surface of the cover 3 , and a third inclined groove 30 and a third protrusion are provided on the surface of the third recess 31 and the surface of the fourth recess 32 .

[0058] The third recess 31 corresponds to the first recess 201 in the second direction, and the first stirring paddle 111 can extend between the first recess 201 and the third recess 31 .

[0059] The fourth recess 32 corresponds to the second recess 202 in the second direction, and the second stirring paddle 112 can extend between the second recess 202 and the fourth recess 32 .

[0060] For example, Figure 1 and Figure 2As shown, the axis of the stirring paddle 11 extends in the left-right direction, so the first recess 201 and the second recess 202 both extend in the left-right direction, and the third recess 31 and the fourth recess 32 both extend in the left-right direction so as to fit with the stirring paddle 11. The third recess 31 and the fourth recess 32 are both recessed in a direction away from the bottom surface of the housing 2, that is, the third recess 31 and the fourth recess 32 are recessed upward from the bottom surface of the cover 3.

[0061] When the defibration device for preparing high-concentration nanocellulose based on enzymatic hydrolysis is working, the first recess 201, the first stirring paddle 111 and the third recess 31 are arranged in sequence from bottom to top, and the second recess 202, the second stirring paddle 112 and the fourth recess 32 are arranged in sequence from bottom to top.

[0062] In some embodiments, the surface of the first recess 201 and the surface of the second recess 202 are both arc surfaces, and in a second projection plane orthogonal to the first direction, the projection of the bottom surface of the inner cavity 20 is substantially W-shaped.

[0063] The surface of the third recess 31 and the surface of the fourth recess 32 are both arc surfaces. In the second projection plane, the projection of the bottom surface of the cover 3 is substantially M-shaped.

[0064] The surfaces of the first recess 201 to the fourth recess 32 are all arc surfaces. Therefore, in the defibrillation device for preparing high-concentration nanocellulose based on enzymatic hydrolysis according to the embodiment of the present invention, the stirring paddle 11 allows the material to flow naturally along the arc surface during rotation, thereby reducing the accumulation and jamming of the material at the edge of the recess.

[0065] The second projection plane is perpendicular to the left-right direction. Since the bottom surface of the inner cavity 20 is provided with the first concave portion 201 and the second concave portion 202, the bottom surface of the inner cavity 20 is substantially W-shaped on the second projection plane. Since the bottom surface of the cover 3 is provided with the third concave portion 31 and the fourth concave portion 32, the bottom surface of the cover 3 is substantially M-shaped on the second projection plane.

[0066] The design of the bottom surface of the W-shaped inner cavity 20 and the bottom surface of the M-shaped cover 3 cooperates with the first inclined groove 110 and the first protrusion on the stirring paddle 11 to form an efficient defibration system, which makes the material more fluid during the rotation process, and then through the multi-directional shearing and friction mechanism, the material is processed more evenly and thoroughly during the defibration process, thereby improving the defibration effect of nanocellulose. In addition, when the cover 3 moves to the lowest point, the volume of the inner cavity 20 reaches the minimum, and two roller-type reaction cavities are formed in the inner cavity 20, so that the material can have sufficient friction with the inner cavity 20 on all sides, further improving the efficiency of fiber nanofiberization.

[0067] In some embodiments, the second oblique groove 21 includes a first sub-oblique groove 211 and a second sub-oblique groove 212 arranged in sequence in the third direction, and an extension direction of the first sub-oblique groove 211 intersects with an extension direction of the second sub-oblique groove 212 .

[0068] The third oblique groove 30 includes a third sub-oblique groove and a fourth sub-oblique groove arranged in sequence in the third direction, and an extending direction of the third sub-oblique groove intersects with an extending direction of the fourth sub-oblique groove.

[0069] For example, Figure 4 As shown, the second oblique groove 21 includes a first sub-oblique groove 211 and a second sub-oblique groove 212 arranged in sequence in the front-to-back direction, and the first sub-oblique groove 211 is arranged in front of the second sub-oblique groove 212. Therefore, in the first recess 201 and the second recess 202, from front to back, there are the first sub-oblique groove 211, the second sub-oblique groove 212, the first sub-oblique groove 211, and the second sub-oblique groove 212.

[0070] The third oblique groove 30 includes a third sub-oblique groove and a fourth sub-oblique groove arranged in sequence in the front-to-back direction, and the third sub-oblique groove is arranged in front of the fourth sub-oblique groove. Therefore, in the first recess 201 and the second recess 202, from front to back, there are the third sub-oblique groove, the fourth sub-oblique groove, the third sub-oblique groove, and the fourth sub-oblique groove.

[0071] Alternatively, if Figure 4 In the unfolded view shown, the angle α between the first sub-oblique groove 211 and the front-to-back direction is 45 degrees, and the angle β between the second sub-oblique groove 212 and the front-to-back direction is 45 degrees.

[0072] In the defibration device for preparing high-concentration nanocellulose based on the enzymatic method of the embodiment of the present invention, by setting two sub-bevels with different extension directions in each recess (such as the first sub-bevel 211 and the second sub-bevel 212, or the third sub-bevel and the fourth sub-bevel), the material will be subjected to shear forces in multiple directions during the defibration process, thereby enhancing the shear effect. Moreover, since the first sub-bevel 211 and the second sub-bevel 212, the third sub-bevel and the fourth sub-bevel have different extension directions, they form staggered shear paths on the projection plane. This staggered design allows the material to continuously change the force direction during the defibration process, reducing the probability of fibers entangled with each other, thereby ensuring the size uniformity and quality stability of the cellulose nanofibers.

[0073] In some other embodiments, only one type of inclined groove is disposed in each of the first recess 201 to the fourth recess 32 .

[0074] In some embodiments, the defibrination device for preparing high-concentration nanocellulose based on enzymatic hydrolysis comprises a base 4, a first slide rail 41 extending along a first direction is provided on the base 4, a first slider 22 cooperating with the first slide rail 41 is provided on the housing 2, and the first slider 22 can move relative to the first slide rail 41 along the first direction. For example, Figure 1 As shown, through the cooperation of the first slide rail 41 and the first slider 22 , the housing 2 can move in the left and right directions, so that the stirring paddle 11 can enter and exit the inner cavity 20 conveniently.

[0075] Optionally, two support rods are provided at the lower end of the housing 2, and a first sliding block 22 is fixed at the bottom of each support rod.

[0076] In other embodiments, the defibration device for preparing high-concentration nanocellulose based on enzymatic hydrolysis includes a locking member, and a locking hole is provided on the first slide rail 41, and the locking member can be inserted into the locking hole to lock the position of the shell 2. The defibration device for preparing high-concentration nanocellulose based on enzymatic hydrolysis according to the embodiment of the present invention can effectively lock the position of the shell 2 by inserting the locking member into the locking hole on the first slide rail 41 to prevent it from accidentally moving during the defibration process. During the defibration process, the shear force and friction force applied to the material by the stirring paddle 11 are very large. If the shell 2 is displaced, it may affect the defibration effect, cause material leakage, and even cause equipment failure. The design of the locking member ensures that the shell 2 remains absolutely stable throughout the entire working process, avoiding material leakage or equipment damage caused by the movement of the shell 2.

[0077] In some embodiments, the defibration device for preparing high-concentration nanocellulose based on enzymatic hydrolysis includes a second slide rail 5 extending along a second direction, and a second slider is provided on the cover 3, and the second slider can move relative to the second slide rail 5 along the second direction.

[0078] For example, Figure 1 As shown, through the cooperation between the second slide rail 5 and the second slider, the cover 3 can move freely in the up and down directions, so that the operator can adjust the position of the cover 3 as needed.

[0079] As the defibration process proceeds, the volume of the material gradually decreases, and the cover 3 can be gradually lowered to maintain continuous pressure on the material, thereby improving the defibration effect.

[0080] In some embodiments, the second slide rail 5 is a lead screw, the slider is threadedly connected to the lead screw, and a rotating handle 6 is provided at the top of the lead screw. The rotating handle 6 is fixedly connected to the lead screw, and the operator can control the rotation of the lead screw by rotating the handle 6, thereby controlling the position of the cover 3. The design of the lead screw makes the movement of the cover 3 very stable and controllable, and can achieve fine adjustment to ensure the sealed connection between the cover 3 and the second opening. This precise positioning is crucial to the defibration process because it ensures the sealing of the inner cavity 20 and prevents leakage of materials during the defibration process.

[0081] Furthermore, the operator can determine the moving distance of the cover 3 by the rotation angle of the rotating handle 6, thereby ensuring that the cover 3 always maintains continuous pressure on the material.

[0082] It should be noted that the cover 3 has a lowest position during the descending process to avoid interference between the cover 3 and the stirring paddle 11. When at the lowest position, the gap between the cover 3 and the stirring paddle 11 is the smallest.

[0083] In other embodiments, the defibration device for preparing high-concentration nanocellulose based on enzymatic hydrolysis includes a guide member 7, which extends along the second direction and is spaced apart from the second slide rail 5, and the cover 3 is slidably connected to the guide member 7. The design of the guide member 7 makes the movement of the cover 3 smoother, ensures that the cover 3 can flexibly adjust the height as needed, maintains continuous pressure on the material, and further improves the defibration effect.

[0084] In some other embodiments, the stirring assembly 1 includes a transmission box 13 and a driving member, and the transmission box 13 is used to connect the driving member and the stirring paddle 11.

[0085] For example, Figure 1 As shown, a transmission member is disposed in the transmission box 13 , and the driving member is connected to the stirring paddle 11 by introducing the transmission box 13 , thereby ensuring efficient transmission of power from the driving member to the stirring paddle 11 .

[0086] Optionally, gears are provided in the transmission box 13, and the driving member is a motor.

[0087] For example, a gear is sleeved on the rotating shaft of the first stirring paddle 111 and the rotating shaft of the second stirring paddle 112, the two gears are meshed, and the number of teeth of the two gears is different. The output shaft 14 of the motor is fixedly connected to the rotating shaft of one of the stirring paddles 11, thereby driving the two stirring paddles 11 to rotate at different speeds.

[0088] Optionally, the depth H of the second oblique groove 21 is 2 mm-8 mm, and the total length L of adjacent second oblique grooves 21 and second protrusions is 4 mm-10 mm.

[0089] Optionally, the first protrusion, the second protrusion and the third protrusion may have various shapes, for example, a sawtooth shape, a round tooth shape and a flat tooth shape.

[0090] Optionally, the first inclined groove 110 , the second inclined groove 21 and the third inclined groove 30 may have various shapes, for example, a trapezoidal groove or a straight groove.

[0091] Preferably, the first protrusion, the second protrusion and the third protrusion are in the shape of flat teeth, and the first inclined groove 110, the second inclined groove 21 and the third inclined groove 30 are in the shape of straight grooves, so as to improve the defibration effect.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A defibrating device for preparing high-concentration nanocellulose based on enzymatic hydrolysis, characterized in that: include: A stirring assembly, the stirring assembly comprising a stirring paddle that can rotate about a first direction, a plurality of first inclined grooves are provided on a portion of an outer circumferential surface of the stirring paddle, and a first protrusion is formed between two adjacent first inclined grooves; A shell, wherein the shell has an inner cavity, a first opening and a second opening, the shell can move relative to the stirring component along the first direction, a plurality of second inclined grooves are provided on the bottom surface of the inner cavity, a second protrusion is formed between two adjacent second inclined grooves, and the stirring component enters and exits the inner cavity through the first opening; A cover, wherein the cover is arranged on the top of the stirring component and can move relative to the stirring component along a second direction, the second direction is orthogonal to the first direction, the cover can be sealed and connected to the second opening, and a plurality of third inclined grooves are arranged on the bottom surface of the cover, and a third protrusion is formed between two adjacent third inclined grooves.

2. The fibrillation device for preparing high-concentration nanocellulose based on enzymatic hydrolysis according to claim 1, characterized in that: In a first projection plane orthogonal to the second direction, at least a portion of the projection extension direction of the second oblique groove intersects with the projection extension direction of the first oblique groove; An extension direction of a projection of at least part of the third oblique groove intersects with an extension direction of a projection of the first oblique groove.

3. The fibrillation device for preparing high-concentration nanocellulose based on enzymatic hydrolysis according to claim 1, characterized in that: The stirring paddle comprises a first stirring paddle and a second stirring paddle, the first stirring paddle and the second stirring paddle are arranged at intervals along a third direction, the third direction is orthogonal to both the first direction and the second direction, and the first stirring paddle and the second stirring paddle have different rotation speeds.

4. The fibrillation device for preparing high-concentration nanocellulose based on enzymatic hydrolysis according to claim 3, characterized in that: A first recess and a second recess are provided on the bottom surface of the inner cavity and are arranged in sequence along the third direction. The second inclined groove and the second protrusion are provided on the surface of the first recess and the surface of the second recess.

5. The fibrillation device for preparing high-concentration nanocellulose based on enzymatic hydrolysis according to claim 4, characterized in that: A third recess and a fourth recess are provided on the bottom surface of the cover, and the third inclined groove and the third protrusion are provided on the surface of the third recess and the surface of the fourth recess; The third recess corresponds to the first recess in the second direction, and the first stirring paddle can extend between the first recess and the third recess; The fourth recess corresponds to the second recess in the second direction, and the second stirring paddle can extend between the second recess and the fourth recess.

6. The fibrillation device for preparing high-concentration nanocellulose based on enzymatic hydrolysis according to claim 5, characterized in that: The surface of the first concave portion and the surface of the second concave portion are both arc surfaces, and in a second projection plane orthogonal to the first direction, the projection of the bottom surface of the inner cavity is substantially W-shaped; The surface of the third recessed portion and the surface of the fourth recessed portion are both arc surfaces, and within the second projection plane, the projection of the bottom surface of the cover is substantially M-shaped.

7. The fibrillation device for preparing high-concentration nanocellulose based on enzymatic hydrolysis according to claim 5, characterized in that: The second oblique groove includes a first sub-oblique groove and a second sub-oblique groove arranged in sequence in the third direction, and an extension direction of the first sub-oblique groove intersects with an extension direction of the second sub-oblique groove; The third oblique groove includes a third sub-oblique groove and a fourth sub-oblique groove arranged in sequence in the third direction, and an extension direction of the third sub-oblique groove intersects with an extension direction of the fourth sub-oblique groove.

8. The fibrillation device for preparing high-concentration nanocellulose based on enzymatic hydrolysis according to claim 1, characterized in that: The fiber-decomposing device for preparing high-concentration nanocellulose based on enzymatic hydrolysis comprises a base, the base is provided with a first slide rail extending along the first direction, the shell is provided with a first slider matched with the first slide rail, and the first slider can move relative to the first slide rail along the first direction.

9. The fibrillation device for preparing high-concentration nanocellulose based on enzymatic hydrolysis according to claim 1, characterized in that: The fibrillation device for preparing high-concentration nanocellulose based on enzymatic hydrolysis comprises a second slide rail extending along the second direction, and a second slider is provided on the cover, and the second slider can move relative to the second slide rail along the second direction.

10. The fibrillation device for preparing high-concentration nanocellulose based on enzymatic hydrolysis according to claim 9, characterized in that: The second slide rail is a lead screw, the slider is threadedly connected to the lead screw, and a rotating handle is provided at the top of the lead screw.

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