Paper pulp grinding machine and grinding method thereof

Abstract

The invention belongs to the technical field of papermaking, and particularly relates to a paper pulp grinding machine and a grinding method thereof. Comprising a pulping part and an enzymatic treatment device, the pulping part comprises a coarse grinding part and a fine grinding part which are arranged in series, the enzymatic treatment device pretreats wood chips, the wood chips subjected to enzymatic treatment are inactivated, washed and dehydrated and then sent to the coarse grinding part for pulping, the enzymatic treatment device comprises a reaction tank, and the top of the reaction tank is covered with a top cover. The top cover covers the interior of the reaction tank to form a reaction chamber for enzyme digestion reaction of wood chips and enzyme liquid, the top cover is provided with a mixing part, the mixing part can stir and mix the enzyme liquid and the wood chips in the reaction tank, the top cover is further provided with an immersion part, the immersion part comprises an immersion plate with a flow channel, and the immersion plate is provided with a water inlet and a water outlet. A pushing part connected with the immersion plate is arranged on the top cover, and the pushing part can push the immersion plate to abut against the wood chips in the reaction tank, so that the wood chips are fully immersed by the enzyme liquid; and the enzyme treatment device is arranged, so that the pulping energy consumption can be effectively reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of papermaking, and in particular relates to a pulp refiner and a pulping method thereof. Background Art

[0002] Patent No. CN117051614A is a pulping machine based on biological enzyme pretreatment, including a bearing structure and a linkage mechanism; the top of the bearing structure is respectively fixedly connected with a fixed structure, a control mechanism, a feeding structure and a guide mechanism, and the top of the bearing structure is also movably connected with a lifting mechanism; the linkage mechanism is installed on the top of the bearing structure, and the linkage mechanism is also movably connected with the control mechanism and the guide mechanism, and the linkage mechanism is attached to the bottom of the feeding structure, and the bottom of the bearing structure is fixedly connected with a thinning structure, and the lifting mechanism includes: a fixed frame B, a motor B, a drive shaft, a connecting block, and a gear A, and the top of the fixed frame B is provided with a motor B, one end of the motor B is fixedly connected with a drive shaft, and the drive shaft is also rotatably connected with the connecting block, and the drive shaft is fixedly connected with a gear A, and grinding discs A, B and C can be used to perform grinding in a progressive and continuous manner, so that the fibers in the material remain intact. In this device, the biological enzyme directly pretreats the material in the grinding disc, and the reaction between the biological enzyme and the material is not sufficient, resulting in the fiber structure of the pulping material not being easy to become looser and easier to separate in the reaction, resulting in more energy consumption for pulping. Summary of the invention

[0003] The purpose of the present invention is to provide a pulp refiner and a pulping method thereof in order to solve the above-mentioned technical problems, and to set up an enzymatic treatment device to improve the degree of fiber refinement and fibrillation of wood chips, thereby helping to reduce the energy consumption of pulping and improve the strength of paper.

[0004] In view of this, the present invention provides a pulp refiner, including a pulping part and an enzymatic treatment device, the pulping part includes a coarse grinding part and a fine grinding part arranged in series, the enzymatic treatment device pre-treats wood chips, and the wood chips after enzymatic treatment are sent to the coarse grinding part for pulping after being inactivated, washed and dehydrated, the enzymatic treatment device includes a reaction tank, the top cover of the reaction tank is provided with a top cover, the top cover is covered with the inside of the reaction tank to form a reaction chamber for enzymatic reaction of wood chips and enzyme solution, the top cover is provided with a mixing component, the mixing component can stir and mix the enzyme solution and wood chips in the reaction tank, the top cover is also provided with an immersion component, the immersion component includes an immersion plate with a flow channel, the top cover is provided with a pushing part connected to the immersion plate, the pushing part can push the immersion plate to press the wood chips in the reaction tank so that the wood chips are fully immersed in the enzyme solution, and the inner wall of the reaction tank is provided with a heating component.

[0005] In the technical scheme, the wood chips are pretreated by the enzymatic treatment device, so that the pulping efficiency and quality of the wood chips are improved. The reaction tank and the top cover that can cover the reaction tank constitute a closed reaction chamber. The reaction chamber is used for the enzymatic reaction of the wood chips and the enzyme solution, and the environmental conditions can be better controlled. The inner wall of the reaction tank is provided with a heating component, which can ensure that the enzymatic reaction is carried out at a suitable temperature to ensure the reaction efficiency. The top cover is provided with a mixing component and an immersion component. The pushing part can push the immersion plate to press the wood chips so that they are fully immersed in the enzyme solution. The enzyme solution and the wood chips are stirred in cooperation with the mixing component, so that the enzyme solution and the wood chips can be fully contacted, thereby accelerating the enzymatic reaction. The reaction can be carried out on wood chips of different materials or other pulp materials such as bamboo chips for enzymatic reaction. When poplar wood chips are selected, heat-resistant xylanase can be used, and when bamboo chips are used, cellulase or xylanase can be used. The enzymatically treated wood chips are inactivated at high temperature, washed and dehydrated, and then sent to the pulping section, and the pulping is completed through the coarse grinding section and the fine grinding section in the pulping section in turn, and the fiber of the enzymatically treated wood chips is refined, the degree of fibrillation and brooming is improved, and the physical properties of the fibers are improved. The fiber decomposition and fibrillation and brooming process can be accelerated during the pulping, making the subsequent pulping process more efficient, which helps to reduce the energy consumption of pulping and improve the strength of the finished paper.

[0006] In the above technical solution, further, a reaction sleeve is provided in the reaction chamber. The reaction sleeve is a cylindrical structure with an opening upward, and a flange is provided on the opening side. The flange can be fixedly abutted against the edge of the reaction tank. The reaction sleeve divides the reaction chamber into a reaction part and a screening part. The reaction part is used to carry wood chips. The bottom wall of the reaction sleeve is provided with a drainage channel, and the side wall is provided with a screening slit. The screening slit is for the slag produced by the wood chips during the enzymatic reaction and when the mixing component is stirred to pass through.

[0007] In the present technical solution, the reaction sleeve divides the reaction chamber into a reaction part and a screening part. When the mixing component stirs the enzyme liquid and wood chips, the residues produced in the enzymatic reaction and the mixing process will move toward the side wall of the reaction sleeve due to the centrifugal force generated by the mixing component during stirring. The residues can leave the reaction part through the screening slits on the side wall and enter the screening part for screening. The drainage channel at the bottom of the reaction sleeve is a through hole arranged in an array, which can allow the enzyme liquid to pass through.

[0008] In the above technical scheme, further, the immersion component includes an immersion plate slidably connected to the inner wall of the reaction sleeve, the immersion plate and the inner wall of the reaction sleeve are abutted, the upper part of the immersion plate is connected with a pushing part, the pushing part includes a first cylinder arranged on the top cover, the output end of the first cylinder is connected through the top cover and the connecting plate arranged on the top of the immersion plate, guide slide columns are arranged on both sides of the connecting plate, and the top cover is provided with a guide seat corresponding to the guide slide column, and the guide seat and the guide slide are slidably connected.

[0009] In the present technical scheme, there are two groups of pushing parts, which are symmetrically arranged on the top cover. The first cylinder is fixedly arranged on the end cover. The output end of the first cylinder passes through the end cover and is fixedly connected with the connecting plate. The connecting plate and the immersion plate are fixedly connected by bolts. The sliding columns on both sides of the cylinder output end are symmetrically arranged on the connecting plate. The end cover is correspondingly provided with a guide seat. The guide seat and the guide sliding column are slidably arranged to ensure the smooth movement of the immersion plate in the vertical direction and avoid uneven pressure distribution caused by tilting or offset. Before the enzymatic reaction, enzyme solution is first added into the reaction tank, and then wood chips are added into the reaction spacer. The immersion plate is pushed downward by two groups of symmetrically arranged pushing parts until the upper end of the immersion plate is submerged in the enzyme solution to ensure sufficient contact between the enzyme solution and the wood chips. The flow channel on the immersion plate is a through hole arranged in an array, which can allow the enzyme solution to pass through.

[0010] In the above technical solution, further, the mixing component includes a driving part arranged on the top of the cover body, the driving part is transmission-connected with a mixing shaft, the mixing shaft passes through the cover body and enters the reaction tank, the mixing shaft extends toward the bottom wall of the reaction sleeve along the central axis direction of the reaction sleeve, the mixing shaft passes through the immersion plate and mixing blades are arranged on the mixing shaft.

[0011] In the present technical solution, the driving part includes a driving motor and a reducer. The horizontal cross-sections of the reaction tank and the reaction sleeve are both circular and coaxially arranged. The mixing shaft is arranged along the central axis of the reaction sleeve. The mixing shaft passes through the immersion plate and diffracts toward the bottom wall of the reaction sleeve. The mixing shaft and the immersion plate are rotatably connected. At least one group of mixing blades is arranged on the mixing shaft, which can stir and mix the enzyme solution and wood chips in the reaction sleeve when the mixing shaft rotates, so as to fully mix them and accelerate the reaction.

[0012] In the above technical solution, further, a positioning protrusion is provided at the bottom of the flange of the reaction spacer, and a matching groove is provided along the edge of the reaction pool opening corresponding to the positioning protrusion.

[0013] In the present technical solution, the corresponding arrangement of the positioning protrusion and the slot can facilitate positioning during installation. During the enzymatic reaction, the mixing component stirs the internal materials, and the corresponding arrangement of the positioning protrusion and the slot can also prevent the reaction sleeve from shifting.

[0014] In the above technical solution, further, the heating component is an electric heating element arranged on the inner wall of the reaction pool, and the reaction pool is heated by generating heat through electric current passing through a resistor.

[0015] In the present technical solution, heating components such as resistance wire, silicon carbon rod, PTC ceramic, etc. have the advantages of high thermal efficiency, fast heating speed, precise temperature control, etc., and are suitable for small-scale, precise temperature control, and environmental protection requirements. In other embodiments, steam, heat transfer oil coils, etc. can be used to send them into the jacket or coil of the reaction tank to exchange heat with the materials in the reaction tank to achieve heating and temperature control.

[0016] In the above technical solution, further, it also includes a flow suppression device, which is arranged on the inner wall of the reaction sleeve along the height direction of the reaction sleeve. The flow suppression device can prevent the flow from generating a vortex ring on the inner wall of the reaction sleeve when the mixing components are mixed.

[0017] In the above technical solution, further, the flow suppression device is a flow suppression plate, which is arranged along the height direction of the reaction spacer, one side of the flow suppression plate is connected to the reaction spacer through a connecting column, and the top of the flow suppression plate and the immersion plate are slidably connected.

[0018] In the present technical scheme, when the vortex ring is stirred by the mixing component, the enzyme liquid generates a vortex ring on the inner wall of the reaction sleeve due to the centrifugal force generated when the mixing component is stirred and mixed, resulting in the slag generated by the wood chips in the enzymatic reaction and when the mixing component is stirred. It is difficult to enter the screening part from the sieve gap on the side wall. By setting the flow suppression device, the generation of the vortex ring can be effectively destroyed. A slide groove for the flow suppression plate to pass through is provided on the immersion plate corresponding to the flow suppression plate. The sliding setting of the slide groove and the flow suppression plate allows the flow suppression plate to fully extend along the height direction of the reaction tank, which can better destroy the formation of the vortex ring. The sliding cooperation of the slide groove and the flow suppression plate can also play a positioning role to ensure accurate installation.

[0019] In the above technical solution, further, the wood chips put into the enzymatic treatment device are firstly subjected to extrusion treatment by a screw extruder.

[0020] In this technical solution, the pre-steamed wood chips are processed by a screw extruder to obtain extruded wood chips. This process makes the structure of the wood chips looser, increases the specific surface area, and is conducive to the penetration and action of biological enzymes.

[0021] Also included is a pulping method of the above pulp refiner, comprising the following steps:

[0022] Also included is a pulping method of the above pulp refiner, comprising the following steps:

[0023] S1: Wash, slice and steam the wood and then put it into a screw extruder for extrusion, so that the structure of the wood chips becomes looser and the specific surface area is increased;

[0024] S2: adding enzyme solution into the reaction tank, and heating and controlling the temperature of the enzyme solution in the reaction tank by a heating component;

[0025] S3: putting the extruded wood chips into the reaction tank and covering it with a cover, ensuring that the wood chips are completely immersed in the enzyme solution through an immersion component, and starting a mixing component to stir and mix to perform an enzymatic reaction;

[0026] S4: After the enzymatic reaction, the wood chips are inactivated at high temperature and washed and dehydrated;

[0027] S5: The wood chips are put into the pulping section, and the pulping is completed through the coarse grinding section and the fine grinding section in sequence.

[0028] The beneficial effects of the present invention are:

[0029] 1. The enzymatic treatment device is used to pre-treat the wood chips, thereby improving the pulping efficiency and quality of the wood chips. The reaction tank and the top cover that can cover the reaction tank constitute a closed reaction chamber, which is used for the enzymatic reaction of the wood chips and the enzyme solution, and can better control the environmental conditions. The inner wall of the reaction tank is provided with a heating component, which can ensure that the enzymatic reaction is carried out at a suitable temperature to ensure the reaction efficiency. The top cover is provided with a mixing component and an immersion component. The pushing part can push the immersion plate to press the wood chips so that they are fully immersed in the enzyme solution. The enzyme solution and the wood chips are stirred in cooperation with the mixing component, which can ensure that the enzyme solution and the wood chips are fully in contact, thereby accelerating the enzymatic reaction. Enzymatic reaction can be performed on wood chips of different materials or other pulp materials such as bamboo chips. When poplar wood chips are selected, heat-resistant xylanase can be used, and when bamboo chips are used, cellulase or xylanase can be used. The wood chips treated with enzymes are inactivated at high temperature, washed and dehydrated, and then sent to the pulping section, and the pulping is completed in turn through the coarse grinding section and the fine grinding section in the pulping section, so as to complete the refinement of the fiber of the enzymatic wood chips, the improvement of the degree of fibrillation and the improvement of the physical properties of the fibers. The fiber decomposition and fibrillation process can be accelerated during the pulping, so that the subsequent pulping process is more efficient, which is helpful to reduce the pulping energy consumption and improve the paper strength;

[0030] 2. There are two groups of pushing parts, which are symmetrically arranged on the top cover. The first cylinder is fixedly arranged on the end cover. The output end of the first cylinder passes through the end cover and is fixedly connected with the connecting plate. The connecting plate and the immersion plate are fixedly connected by bolts. The connecting plates are symmetrically arranged on the sliding posts on both sides of the cylinder output end. The end cover is correspondingly provided with a guide seat. The guide seat and the guide sliding post are slidably arranged to ensure the smooth movement of the immersion plate in the vertical direction and avoid uneven pressure distribution caused by tilting or offset. Before the enzymatic reaction, enzyme solution is first added into the reaction tank, and then wood chips are added into the reaction spacer. The immersion plate is pushed downward by the two groups of symmetrically arranged pushing parts until the upper end of the immersion plate is submerged by the enzyme solution, ensuring full contact between the enzyme solution and the wood chips. The flow channel on the immersion plate is a through hole arranged in an array, which can allow the enzyme solution to pass through;

[0031] 3. When the vortex ring is stirred by the mixing component, the enzyme liquid generates a vortex ring on the inner wall of the reaction sleeve due to the centrifugal force generated by the mixing component during stirring, resulting in the slag produced by the wood chips in the enzymatic reaction and when the mixing component is stirring. It is difficult for the slag to enter the sieving part from the sieve gap on the side wall. The setting of the flow suppression device can effectively destroy the generation of the vortex ring. A slide groove for the flow suppression plate to pass through is provided on the immersion plate corresponding to the flow suppression plate. The sliding setting of the slide groove and the flow suppression plate allows the flow suppression plate to fully extend along the height direction of the reaction tank, which can better destroy the formation of the vortex ring. The sliding cooperation of the slide groove and the flow suppression plate can also play a positioning role to ensure accurate installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the structure of a partial cross-sectional view of an enzymatic treatment device;

[0033] Figure 2 It is a simplified view of the refining process;

[0034] Figure 3 It is a process diagram of the pulping process;

[0035] Figure 4 This is a schematic diagram of the structure of the reaction sleeve from two angles

[0036] Figure 5 It is a schematic diagram of the structure of the cover body, the mixing component and the immersion component.

[0037] The symbols in the figure are:

[0038] 1. Refining section; 2. Enzymatic treatment device; 3. Coarse grinding section; 4. Fine grinding section; 5. Reaction tank; 6. Top cover; 7. Reaction chamber; 8. Mixing component; 9. Immersed component; 10. Flow channel; 11. Immersed plate; 12. Pushing section; 13. Reaction spacer; 14. Flanging; 15. Reaction section; 16. Screening section; 17. Drain channel; 18. Moving ring sleeve; 19. Moving groove; 20. First cylinder; 21. Connecting plate; 22. Guide slide column; 23. Guide seat; 24. Driving section; 25. Mixing shaft; 26. Mixing blade; 27. Positioning protrusion; 28. Flow suppression device; 29. ​​Flow suppression plate; 30. Connecting column; 31. Screw extruder; 32. Slide groove. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0040] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0042] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0043] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0044] First embodiment:

[0045] like Figure 1-5 As shown, this embodiment provides a pulp refiner, including a refining section 1 and an enzymatic treatment device 2, the refining section 1 includes a coarse grinding section 3 and a fine grinding section 4 arranged in series, the enzymatic treatment device 2 pre-treats wood chips, and the enzymatically treated wood chips are sent to the coarse grinding section 3 for refining after being inactivated, washed and dehydrated, the enzymatic treatment device 2 includes a reaction tank 5, the top of the reaction tank 5 is covered with a top cover 6, the top cover 6 is covered inside the reaction tank 5 to form a reaction chamber 7 for enzymatic reaction of wood chips and enzyme solution, the top cover 6 is provided with a mixing component 8, the mixing component 8 can stir and mix the enzyme solution and wood chips in the reaction tank 5, the top cover 6 is also provided with an immersion component 9, the immersion component 9 includes an immersion plate 11 with a flow channel 10, the top cover 6 is provided with a pushing part 12 connected to the immersion plate 11, the pushing part 12 can push the immersion plate 11 to press the wood chips in the reaction tank 5 so that the wood chips are fully immersed in the enzyme solution, and the inner wall of the reaction tank 5 is provided with a heating component.

[0046] The enzymatic treatment device 2 is used to pre-treat the wood chips, thereby improving the pulping efficiency and quality of the wood chips. The reaction tank 5 and the top cover 6 that can cover the reaction tank 5 constitute a closed reaction chamber 7. The reaction chamber 7 is used for the enzymatic reaction of the wood chips and the enzyme solution, and can better control the environmental conditions. The inner wall of the reaction tank 5 is provided with a heating component, which can ensure that the enzymatic reaction is carried out at a suitable temperature to ensure the reaction efficiency. The top cover 6 is provided with a mixing component 8 and an immersion component 9. The pushing part 12 can push the immersion plate 11 to press the wood chips so that they are fully immersed in the enzyme solution. The mixing component 8 is used to stir the enzyme solution and the wood chips, which can ensure that the enzyme solution and the wood chips are fully in contact, thereby accelerating the enzyme reaction. The enzymatic reaction can be carried out on wood chips of different materials or other pulp materials such as bamboo chips. When poplar wood chips are selected, heat-resistant xylanase can be used, and when bamboo chips are used, cellulase or xylanase can be used. The enzymatically treated wood chips are inactivated at high temperature, washed and dehydrated, and then sent to the refining section 1, and the refining is completed through the coarse grinding section 3 and the fine grinding section 4 in the refining section 1 in turn, and the fiber of the enzymatically treated wood chips is refined, the degree of fibrillation is improved, and the physical properties of the fibers are improved. The fiber decomposition and fibrillation process can be accelerated during the refining process, making the subsequent refining process more efficient, which helps to reduce the energy consumption of refining and improve the strength of paper.

[0047] The coarse grinding section 3 and the fine grinding section 4 are both refiners in the prior art. The refining gap of the refiner unit in the coarse grinding section 3 is 0.40-0.55 mm, and the refining gap of the refiner unit in the fine grinding section 4 is 0.12-0.20 mm. Through the two-stage treatment of coarse grinding and fine grinding, the length and shape of the fiber can be better controlled, thereby improving the quality of pulp and reducing energy consumption and equipment wear.

[0048] like Figure 1 and Figure 4 As shown, a reaction sleeve 13 is further provided in the reaction chamber 7. The reaction sleeve 13 is a cylindrical structure with an opening upward, and a flange 14 is provided on the opening side. The flange 14 can be fixedly abutted against the edge of the reaction tank 5. The reaction sleeve 13 divides the reaction chamber 7 into a reaction part 15 and a screening part 16. The reaction part 15 is used to carry wood chips. The bottom wall of the reaction sleeve 13 is provided with a drainage channel 17, and the side wall is provided with a screening slit. The screening slit is for the slag produced by the wood chips during the enzymatic reaction and when the mixing component 8 is stirred to pass through.

[0049] The reaction sleeve 13 divides the reaction chamber 7 into a reaction part 15 and a screening part 16. When the mixing component 8 stirs the enzyme solution and the wood chips, the residues produced in the enzymatic reaction and the mixing process will move toward the side wall of the reaction sleeve 13 due to the centrifugal force generated by the mixing component 8 during stirring and mixing. The residues can leave the reaction part 15 through the screening slits (not shown) on the side wall and enter the screening part 16 for screening. The drainage channel 17 at the bottom of the reaction sleeve 13 is an array of through holes that can allow the enzyme solution to pass through.

[0050] A movable sleeve ring is provided on the upper part of the cover body, and a movable groove 19 is provided on the side wall of the reaction spacer sleeve 13. The movable sleeve 18 and the movable groove 19 are both arranged in a circle and can be lifted by a lifting device. At the same time, components such as the rubber sealing ring between the cover body and the reaction pool 5, the ventilation pipe connected to the cover body, and the pressure gauge, temperature sensor, and pH value detection device are not drawn in the figure, but they do not exist.

[0051] like Figure 1 and Figure 5 As shown, the immersion component 9 includes an immersion plate 11 slidably connected to the inner wall of the reaction spacer 13, the immersion plate 11 abuts against the inner wall of the reaction spacer 13, the upper part of the immersion plate 11 is connected with a pushing part 12, the pushing part 12 includes a first cylinder 20 arranged on the top cover 6, the output end of the first cylinder 20 passes through the top cover 6 and is connected with a connecting plate 21 arranged on the top of the immersion plate 11, guide slides 22 are arranged on both sides of the first cylinder 20 on the connecting plate 21, and a guide seat 23 is passed through the top cover 6 corresponding to the guide slide 22, and the guide seat 23 and the guide slide are slidably connected.

[0052] There are two groups of pushing parts 12, which are symmetrically arranged on the top cover 6. The first cylinder 20 is fixedly arranged on the end cover. The output end of the first cylinder 20 passes through the end cover and is fixedly connected to the connecting plate 21. The connecting plate 21 and the immersion plate 11 are fixedly connected by bolts. The connecting plate 21 is symmetrically arranged with sliding columns on both sides of the cylinder output end. The end cover is correspondingly provided with a guide seat 23. The guide seat 23 and the guide sliding column 22 are slidably arranged to ensure the smooth movement of the immersion plate 11 in the vertical direction and avoid uneven pressure distribution caused by tilting or offset. Before the enzymatic reaction, enzyme solution is first added into the reaction tank 5, and then wood chips are added into the reaction spacer 13. The immersion plate 11 is pushed downward by the two groups of symmetrically arranged pushing parts 12 until the upper end of the immersion plate 11 is submerged by the enzyme solution to ensure full contact between the enzyme solution and the wood chips. The flow channel 10 on the immersion plate 11 is a through hole arranged in an array, which can allow the enzyme solution to pass through.

[0053] like Figure 1 and Figure 5 As shown, the mixing component 8 includes a driving portion 24 arranged on the top of the cover body, the driving portion 24 is transmission-connected with a mixing shaft 25, the mixing shaft 25 passes through the cover body and enters the reaction pool 5, the mixing shaft 25 extends toward the bottom wall of the reaction sleeve 13 along the central axis direction of the reaction sleeve 13, the mixing shaft 25 passes through the immersion plate 11 and a mixing blade 26 is arranged on the mixing shaft 25.

[0054] The driving part 24 includes a driving motor and a reducer. The horizontal cross-sections of the reaction pool 5 and the reaction sleeve 13 are both circular and coaxially arranged. The mixing shaft 25 is arranged along the central axis of the reaction sleeve 13. The mixing shaft 25 passes through the immersion plate 11 and diffracts toward the bottom wall of the reaction sleeve 13. The mixing shaft 25 and the immersion plate 11 are rotatably connected. At least one group of mixing blades 26 are arranged on the mixing shaft, which can stir and mix the enzyme solution and wood chips in the reaction sleeve 13 when the mixing shaft 25 rotates, so as to fully mix them and accelerate the reaction.

[0055] like Figure 4 As shown, a positioning protrusion 27 is provided at the bottom of the flange 14 of the reaction spacer 13 , and a matching slot is provided along the edge of the opening of the reaction pool 5 corresponding to the positioning protrusion 27 .

[0056] The corresponding arrangement of the positioning protrusion 27 and the slot can facilitate positioning during installation. During the enzymatic reaction, the mixing component 8 stirs the internal materials, and the corresponding arrangement of the positioning protrusion 27 and the slot can also prevent the reaction sleeve 13 from shifting.

[0057] The heating component is an electric heating element arranged on the inner wall of the reaction pool 5 , and generates heat by passing electric current through a resistor to heat the reaction pool 5 .

[0058] Heating components such as resistance wire, silicon carbon rod, PTC ceramic, etc. have the advantages of high thermal efficiency, fast heating speed, precise temperature control, etc., and are suitable for small-scale, precise temperature control, and environmental protection requirements. In other embodiments, steam, heat transfer oil coils, etc. can be used to send them into the jacket or coil of the reaction pool 5 to exchange heat with the materials in the reaction pool 5 to achieve heating and temperature control.

[0059] like Figure 1 As shown, it also includes a flow suppression device 28, which is arranged on the inner wall of the reaction sleeve 13 along the height direction of the reaction sleeve 13. The flow suppression device 28 can prevent the flow from generating a vortex ring on the inner wall of the reaction sleeve 13 when the mixing component 8 is mixing.

[0060] The flow suppression device 28 is a flow suppression plate 29, which is arranged along the height direction of the reaction spacer 13. One side of the flow suppression plate 29 is connected to the reaction spacer 13 through a connecting column 30, and the top of the flow suppression plate 29 and the immersion plate 11 are slidably connected.

[0061] When the vortex ring is stirred by the mixing component 8, the enzyme liquid generates a vortex ring on the inner wall of the reaction sleeve 13 due to the centrifugal force generated by the mixing component 8 during stirring, resulting in the slag generated by the wood chips in the enzymatic reaction and when the mixing component 8 is stirred. It is difficult to enter the screening part 16 from the sieve gap on the side wall. The setting of the flow suppression device 28 can effectively destroy the generation of the vortex ring. The immersion plate 11 is provided with a slide groove 32 for the flow suppression plate 29 to pass through corresponding to the flow suppression plate 29. The sliding setting of the slide groove 32 and the flow suppression plate 29 allows the flow suppression plate 29 to fully extend along the height direction of the reaction tank 5, which can better destroy the formation of the vortex ring. The sliding cooperation between the slide groove 32 and the flow suppression plate 29 can also play a positioning role to ensure accurate installation.

[0062] The wood chips fed into the enzymatic treatment device 2 are firstly subjected to extrusion treatment by a screw extruder 31 .

[0063] The pre-steamed wood chips are processed by a screw extruder 31 to obtain extruded wood chips. This process makes the structure of the wood chips looser, increases the specific surface area, and is conducive to the penetration and action of the biological enzyme.

[0064] Also included is a pulping method of the above pulp refiner, comprising the following steps:

[0065] S1; the wood is washed, sliced, steamed and then put into a screw extruder 31 for extrusion, so that the structure of the wood chips is looser and the specific surface area is increased;

[0066] S2: adding enzyme solution into the reaction tank 5, and heating and controlling the temperature of the enzyme solution in the reaction tank 5 by a heating component;

[0067] S3: putting the extruded wood chips into the reaction tank 5 and covering it with a cover, ensuring that the wood chips are completely immersed in the enzyme solution through the immersion component 9, and starting the mixing component 8 to stir and mix to perform enzymatic reaction;

[0068] S4: After the enzymatic reaction, the wood chips are inactivated at high temperature and washed and dehydrated;

[0069] S5: The wood chips are put into the pulping section 1, and the pulping is completed by the rough grinding section 3 and the fine grinding section 4 in sequence.

[0070] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A pulp refiner, characterized in that: The invention comprises a pulping section (1) and an enzymatic treatment device (2), wherein the pulping section (1) comprises a coarse grinding section (3) and a fine grinding section (4) which are arranged in series, the enzymatic treatment device (2) performs pretreatment on wood chips, and the wood chips after enzymatic treatment are sent to the coarse grinding section (3) for pulping after being inactivated, washed and dehydrated, the enzymatic treatment device (2) comprises a reaction tank (5), the top of the reaction tank (5) is covered with a top cover (6), the top cover (6) is covered inside the reaction tank (5) to form a reaction chamber (7) for enzymatic reaction between wood chips and enzyme solution, and the top cover (6) ) is provided with a mixing component (8), the mixing component (8) can stir and mix the enzyme liquid and wood chips in the reaction tank (5), the top cover (6) is also provided with an immersion component (9), the immersion component (9) includes an immersion plate (11) with a flow channel (10), the top cover (6) is provided with a pushing part (12) connected to the immersion plate (11), the pushing part (12) can push the immersion plate (11) to press the wood chips in the reaction tank (5) so that the wood chips are fully immersed in the enzyme liquid, and the inner wall of the reaction tank (5) is provided with a heating component.

2. The pulp refiner according to claim 1, characterized in that A reaction sleeve (13) is further provided in the reaction chamber (7). The reaction sleeve (13) is a cylindrical structure with an opening facing upwards. A flange (14) is provided on the side of the opening. The flange (14) can be fixedly abutted against the edge of the reaction tank (5). The reaction sleeve (13) divides the reaction chamber (7) into a reaction part (15) and a screening part (16). The reaction part (15) is used to carry wood chips. A drainage channel (17) is provided on the bottom wall of the reaction sleeve (13). Screen slits are provided on the side wall. The screen slits are used for passing slag generated by the wood chips during the enzymatic reaction and when the mixing component (8) is stirred.

3. The pulp refiner according to claim 2, characterized in that The immersion component (9) comprises an immersion plate (11) slidably connected to the inner wall of the reaction spacer (13); the immersion plate (11) and the inner wall of the reaction spacer (13) are in contact with each other; the upper part of the immersion plate (11) is connected with a pushing part (12); the pushing part (12) comprises a first cylinder (20) arranged on the top cover (6); the output end of the first cylinder (20) passes through the top cover (6) and is connected with a connecting plate (21) arranged on the top of the immersion plate (11); guide slides (22) are arranged on both sides of the connecting plate (21); a guide seat (23) is passed through the top cover (6) corresponding to the guide slides (22); and the guide seat (23) and the guide slide are slidably connected.

4. The pulp refiner according to any one of claims 1 to 3, characterized in that The mixing component (8) comprises a driving part (24) arranged on the top of the cover body, the driving part (24) is drivingly connected to a mixing shaft (25), the mixing shaft (25) passes through the cover body and enters the reaction pool (5), the mixing shaft (25) extends toward the bottom wall of the reaction sleeve (13) along the central axis direction of the reaction sleeve (13), the mixing shaft (25) passes through the immersion plate (11) and a mixing blade (26) is arranged on the mixing shaft (25).

5. The pulp refiner according to claim 2, characterized in that: A positioning protrusion (27) is provided at the bottom of the flange (14) of the reaction spacer (13), and a matching slot is provided along the edge of the opening of the reaction pool (5) corresponding to the positioning protrusion (27).

6. The pulp refiner according to claim 1, characterized in that The heating component is an electric heating element arranged on the inner wall of the reaction pool (5), and generates heat by passing electric current through a resistor to heat the reaction pool (5).

7. The pulp refiner according to claim 1, characterized in that It also includes a flow suppression device (28), which is arranged on the inner wall of the reaction sleeve (13) along the height direction of the reaction sleeve (13). The flow suppression device (28) can prevent the flow from generating a vortex ring on the inner wall of the reaction sleeve (13) when the mixing component (8) is mixing.

8. The pulp refiner according to claim 7, characterized in that The flow suppression device (28) is a flow suppression plate (29), which is arranged along the height direction of the reaction spacer (13). One side of the flow suppression plate (29) is connected to the reaction spacer (13) through a connecting column (30), and the top of the flow suppression plate (29) and the immersion plate (11) are slidably connected.

9. The pulp refiner according to claim 1, characterized in that The wood chips fed into the enzymatic treatment device (2) are first subjected to extrusion treatment by a screw extruder (31).

10. A pulping method based on the pulp refiner according to claim 1, characterized in that: The following steps are involved: S1； The wood is washed, sliced, steamed, and then placed in a screw extruder (31) for extrusion, so that the structure of the wood chips becomes looser and the specific surface area is increased; S2: adding enzyme solution into the reaction tank (5), and heating and controlling the temperature of the enzyme solution in the reaction tank (5) by a heating component; S3: putting the extruded wood chips into the reaction tank (5), and covering it with a cover, using an immersion component (9) to ensure that the wood chips are completely immersed in the enzyme solution, and starting a mixing component (8) to stir and mix, and perform an enzymatic reaction; S4: After the enzymatic reaction, the wood chips are inactivated at high temperature and washed and dehydrated; S5: The wood chips are put into the pulping section (1), and then passed through the coarse grinding section (3) and the fine grinding section (4) to complete the pulping.

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