Bamboo fiber extraction production line

Abstract

The utility model provides a bamboo fiber extraction production line. The bamboo fiber extraction production line comprises a processing tank and rolling and screening equipment, the processing tank is used for softening the bamboo chips so as to preliminarily separate cellulose, hemicellulose and lignin in the bamboo chips; the rolling and screening equipment comprises a rolling device and a screening device; the rolling device is arranged on the downstream portion of the processing tank and comprises at least one roller and a rolling face, and the roller can rotate around the rotating axis of the roller so that the softened bamboo chips can be pressed to the rolling face, and the bamboo chips are crushed to form bamboo fibers and fragments. And the screening device is arranged at the downstream of the rolling device and can screen bamboo fibers and scraps. According to the production line, the problem that bamboo fibers are torn when bamboo materials are processed and firecracked is effectively solved, the completeness of the bamboo fibers is guaranteed, the quality of the bamboo fibers is improved, and vibration and noise generated when the bamboo materials are processed and screened are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of biomass material application technology, especially to a bamboo fiber extraction production line. BACKGROUND

[0002] Bamboo fiber has a wide application prospect in the fields of textile, medical treatment, construction, packaging, agriculture and the like, and is paid more and more attention due to its environmental protection and sustainability.

[0003] In the related art, the bamboo fiber is generally extracted from bamboo by using a steam explosion machine for steam explosion treatment. However, the use of the steam explosion machine for extracting the bamboo fiber can easily lead to the problems of the fine and small bamboo fiber, and the large vibration and noise after the steam explosion of the bamboo. SUMMARY

[0004] The present application aims to provide a bamboo fiber extraction production line which effectively avoids the problems of the fine and small bamboo fiber, and the large vibration and noise during the extraction of the bamboo fiber.

[0005] To solve the above technical problems, the present application adopts the following technical solutions:

[0006] According to one aspect of the present application, a bamboo fiber extraction production line is provided, which comprises: a processing tank and a roller pressing and screening device; the processing tank is used for softening bamboo chips to preliminarily separate cellulose, hemicellulose and lignin in the bamboo chips; the roller pressing and screening device comprises a roller pressing device and a screening device; the roller pressing device is arranged downstream of the processing tank, and comprises at least one roller and a roller pressing surface; the roller can rotate around its own rotation axis to press the softened bamboo chips onto the roller pressing surface, so that the bamboo chips are crushed to form bamboo fiber and chaff; the bamboo fiber comprises the cellulose and the hemicellulose, and the chaff comprises the lignin; the screening device is arranged downstream of the roller pressing device, and can screen the bamboo fiber and the chaff.

[0007] In some embodiments, the roller pressing device comprises a connecting frame and at least one roller set; the roller set comprises two rollers which are both rotatably connected in the connecting frame, and the rotation axes of the two rollers are arranged in parallel; the outer periphery of one of the rollers is the roller pressing surface; the two rollers are relatively rotated to press the softened bamboo chips to separate the chaff in the bamboo chips.

[0008] In some embodiments, the roller pressing device comprises a plurality of roller sets which are arranged in an up-down manner; in a horizontal projection plane, the projection of the gap between the two rollers in the upper roller set is located on one roller of the lower roller set and on the side of the two rollers facing each other, so as to facilitate the lower roller to carry the bamboo fiber and the chaff pressed by the upper roller set.

[0009] In some embodiments, the rolling device comprises at least one roller and a bearing plate, and the bearing plate is provided with the rolling surface on one side of the roller.

[0010] In some embodiments, the rolling and screening device can be multiple, and the multiple rolling and screening devices are sequentially connected.

[0011] In some embodiments, the surface of the roller is roughened.

[0012] In some embodiments, a material pushing guide is arranged upstream of the rolling device, and the material pushing guide is arranged on the upper side of the rolling device and is inclined to resist and guide the bamboo chips into the rolling device along the fiber growth direction.

[0013] In some embodiments, the output end of the processing tank is located on the lower side of the input end of the rolling device, and a conveying belt is arranged between the processing tank and the rolling device, and the conveying belt is inclined to extend from the processing tank to the rolling device to input the softened bamboo chips into the rolling device.

[0014] In some embodiments, the processing tank is a heating tank for high-temperature and high-pressure softening treatment of the bamboo chips.

[0015] In some embodiments, the processing tank is a chemical tank for containing lye for soaking and softening the bamboo chips.

[0016] From the above technical solution, the present application has at least the following advantages and positive effects:

[0017] In the present application, the bamboo chips are first added to the processing tank for softening treatment to preliminarily separate cellulose, hemicellulose and lignin. Then, the softened bamboo chips are input into the rolling and screening device, so that the roller holds the bamboo chips on the rolling surface to crush the bamboo chips and separate the bamboo fibers and the powder. Finally, the bamboo fibers and the powder are screened by the screening device to separate the bamboo fibers and the powder, thereby avoiding the problem of tearing the bamboo fibers during steam explosion of the bamboo, ensuring the integrity of the bamboo fibers, improving the quality of the bamboo fibers, and reducing the vibration and noise during bamboo processing and screening. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic view of the production line of the present application.

[0019] Figure 2 is a structural schematic view of the combination of the conveying belt and the rolling and screening device of the present application.

[0020] Figure 3It is the structural schematic diagram of the combined belt conveyor, roller pressing and screening equipment and conveying belt.

[0021] The reference signs are explained as follows: 210, conveying belt; 211, first bearing part; 212, inclined part; 213, second bearing part; 220, material pushing guide device; 221, fixing piece; 222, inclined guide plate; 230, conveying belt; 300, roller pressing and screening equipment; 310, bearing frame; 320, roller pressing device; 321, connecting frame; 322, roller set; 3221, roller; 330, screening device; 331, vibrating screen; 332, damping piece; 333, collecting hopper; 340, double material uniformizing screw device; 341, box body; 342, screw structure; 343, feeding hopper. DETAILED DESCRIPTION

[0022] The typical embodiments embodying the features and advantages of the present application will be described in detail in the following description. It should be understood that the present application can be varied in a wide range of embodiments, none of which depart from the scope of the present application, and the description and drawings are to be considered as illustrative in nature, and not as restrictive to the present application.

[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship 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, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0024] Bamboo material includes cellulose, hemicellulose and lignin, which can be widely used in pulp and papermaking, biofuel, food additives, medicine, construction and other industries. However, the hardness of bamboo material is high, the shape is irregular, and the industrialized extraction of its fibers is difficult, and the processing efficiency is low.

[0025] When bamboo material is processed and decomposed, the bamboo material can be decomposed to form bamboo fibers and chaff. The bamboo fibers include cellulose and hemicellulose. The chaff includes lignin.

[0026] In the related art, the cellulose, hemicellulose and lignin in bamboo are separated by steam explosion. However, the bamboo fibers are extracted by steam explosion, on the one hand, because the steam explosion pressure in the steam explosion cavity of the steam explosion machine is large, the bamboo fibers are easily torn during steam explosion, and the bamboo fibers after steam explosion are small in size and poor in quality; on the other hand, the steam explosion machine produces a large amount of noise pollution during steam explosion, which greatly affects the operators.

[0027] Figure 1 Fig. 1 is a structural schematic diagram of a bamboo fiber extraction production line according to the present application. Figure 2 Fig. 2 is a structural schematic diagram of a combination of a conveying belt and a roller pressing and screening equipment according to the present application.

[0028] Referring to Figs. 1 and 2, Figure 1 and Figure 2 The present application provides a bamboo fiber extraction production line, which comprises a processing tank (not shown in the figure) and a roller pressing and screening equipment 300. The processing tank is used for softening bamboo chips to preliminarily separate the cellulose, hemicellulose and lignin in the bamboo chips. The roller pressing and screening equipment 300 comprises a roller pressing device 320 and a screening device 330. The roller pressing device 320 is arranged downstream of the processing tank, and the roller pressing device 320 comprises at least one roller 3221 and a roller pressing surface. The roller 3221 can rotate around its own rotation axis to press the softened bamboo chips onto the roller pressing surface, so that the bamboo chips are crushed to form bamboo fibers and fines. The bamboo fibers comprise cellulose and hemicellulose. The fines comprise lignin. The screening device 330 is arranged downstream of the roller pressing device 320, and the screening device 330 can screen the bamboo fibers and the fines.

[0029] The operator first adds the bamboo chips into the processing tank for softening treatment to preliminarily separate the cellulose, hemicellulose and lignin. Then, the softened bamboo chips are input into the roller pressing and screening equipment 300, so that the roller 3221 holds the bamboo chips on the roller pressing surface, thereby crushing the bamboo chips to separate the bamboo fibers and the fines. The roller pressing device 320 can completely and effectively crush the bamboo chips, so that the bamboo fibers and the fines are fully separated. Finally, the screening device 330 screens the bamboo fibers and the fines to separate the bamboo fibers and the fines.

[0030] The bamboo fiber extraction production line effectively avoids tearing the bamboo fibers during steam explosion, guarantees the integrity of the bamboo fiber extraction, makes the bamboo fibers after extraction larger in size, and improves the quality of the bamboo fibers. Moreover, the bamboo fiber extraction production line also effectively avoids a large amount of dust generated by the steam explosion method, and avoids the influence of the noise pollution generated by the steam explosion method on the life and health of the operators.

[0031] It can be understood that the bamboo fibers mainly comprise cellulose and hemicellulose, but also a small part of lignin. The fines mainly comprise lignin, but also a small part of fine cellulose and hemicellulose.

[0032] Reference is made to Figure 1 For the convenience of understanding and description, the state of the bamboo fiber extraction production line placed on the working floor is taken as the reference, and the up-down direction of the production line is taken as the up-down direction hereinafter.

[0033] In the embodiment, the processing tank is used to accommodate and process a plurality of bamboo chips, so as to soften the bamboo chips, loosen the structure between cellulose, hemicellulose and lignin, and preliminarily separate the cellulose, hemicellulose and lignin, thereby facilitating subsequent rolling processing.

[0034] In some embodiments, the processing tank is a heating tank, which is used for high-temperature and high-pressure softening treatment of the bamboo chips.

[0035] When the plurality of bamboo chips are placed into the heating tank, the heating tank is closed and heated and pressurized to cook the bamboo chips. When the temperature in the heating tank reaches a preset temperature and the pressure in the heating tank reaches a preset pressure, the heating tank is pressure-maintained. After the heating tank is pressure-maintained for a preset time period, the pressure is released, so as to preliminarily separate the cellulose, hemicellulose and lignin, and also to maintain the integrity of the bamboo chips, thereby facilitating the movement of the bamboo chips from the heating tank to the rolling device 320.

[0036] In other embodiments, the preset temperature range of the heating tank is 120℃-210℃, the preset pressure of the heating tank is 0.6Mpa-2.2Mpa, and the pressure-maintained preset time period of the heating tank is 5min-20min.

[0037] In some embodiments, the processing tank is a chemical tank, and the chemical tank is used to accommodate an alkali solution for soaking and softening the bamboo chips.

[0038] When the plurality of bamboo chips are placed into the chemical tank, the bamboo chips are immersed in the alkali solution. The alkali solution penetrates into the bamboo chips to soften the bamboo chips, so as to preliminarily separate the lignin, cellulose and hemicellulose.

[0039] In other embodiments, after the bamboo chips are soaked in the alkali solution in the chemical tank, the chemical tank is heated to assist the alkali solution in softening the bamboo chips.

[0040] In other embodiments, the alkali solution can be a sodium hydroxide alkali solution. The concentration range of the sodium hydroxide alkali solution is 3%-10%, and the soaking time of the bamboo chips in the sodium hydroxide alkali solution is greater than 2h.

[0041] It should be noted that different alkali solution concentrations, temperatures and soaking time periods have a significant impact on the softening effect of the bamboo chips.

[0042] In other embodiments, the alkali solution can also be a sodium carbonate alkali solution, a potassium hydroxide alkali solution, etc.

[0043] Reference is made to Figure 1 and Figure 2In this embodiment, a conveyor belt 210 is further disposed between the processing tank and the roller pressing device 320. The input end of the conveyor belt 210 is connected to the output end of the processing tank, and the output end of the conveyor belt 210 is connected to the roller pressing device 320. The conveyor belt 210 can quickly transport the softened bamboo chips to the roller pressing device 320, thereby reducing labor costs and improving transportation efficiency and production efficiency.

[0044] In some embodiments, the output end of the processing tank is located below the input end of the rolling device 320. The conveyor belt 210 extends obliquely from the processing tank toward the rolling device 320 to input the softened bamboo slices into the rolling device 320, facilitating the movement of the bamboo slices from top to bottom within the rolling device 320.

[0045] Figure 3 It is a structural diagram of the utility model after the conveyor belt, roller screening equipment and conveyor belt are combined.

[0046] See Figures 1 to 3 In this embodiment, the conveyor belt 210 includes a first supporting portion 211 and an inclined portion 212. The first supporting portion 211 is located below the output end of the processing tank and is used to support and convey the softened bamboo chips output from the processing tank. The inclined portion 212 extends upward from the processing tank toward the roller pressing device 320. The bottom end of the inclined portion 212 is connected to the first supporting portion 211 to convey the bamboo chips on the first supporting portion 211 to the upper side of the roller pressing device 320.

[0047] The conveyor belt 210 further includes a second supporting portion 213 disposed at the top of the inclined portion 212 to receive the bamboo chips conveyed by the inclined portion 212. Furthermore, the second supporting portion 213 is inclined from top to bottom in a direction away from the first supporting portion 211 to convey the bamboo chips into the rolling device 320.

[0048] The second supporting portion 213 does not need to transport the bamboo pieces. The bamboo pieces can overcome the friction between the second supporting portion 213 and the bamboo pieces under the action of their own weight, so that the bamboo pieces move downward into the rolling device 320 .

[0049] See Figures 1 to 3 In this embodiment, a material-dividing guide device 220 is provided upstream of the roller pressing device 320. The material-dividing guide device 220 is located on the upper side of the roller pressing device 320. The material-dividing guide device 220 is tilted to support and guide the bamboo pieces so that the fiber growth direction of the bamboo pieces is parallel to the movement direction of the bamboo pieces before being introduced into the roller pressing device 320.

[0050] It is understandable that the fiber growth direction is the extension direction of the bamboo during its normal growth process.

[0051] See Figures 1 to 3In the embodiment, the conveying belt 210 comprises a first bearing part 211, an inclined part 212 and a second bearing part 213. The poking guide 220 is arranged on the second bearing part 213 and is located on the upper side of the roller pressing device 320.

[0052] The poking guide 220 comprises a fixing member 221 and at least one inclined guide plate 222. The fixing member 221 can be connected to the second bearing part 213 and is located on the upper side of the roller pressing device 320. The inclined guide plate 222 is connected to the fixing member 221 and is located on the upper side of the second bearing part 213, so as to resist and guide the bamboo chips, so that the extension directions of the plurality of bamboo chips are the same, facilitating the subsequent roller pressing and screening processing.

[0053] In the horizontal plane, the inclined guide plate 222 extends obliquely, so that the inclined guide plate 222 and the conveying direction of the second bearing part 213 form an acute angle. When the bamboo chips move on the second bearing part 213 under the action of their own gravity, the inclined guide plate 222 can make the length direction of the bamboo chips the same as the inclined direction of the inclined guide plate 222, so that the length direction of the bamboo fibers produced after the bamboo chips pass through the roller pressing device 320 is the same. On the one hand, when the roller pressing device 320 crushes the bamboo, the roller pressing device 320 gradually presses and bends the bamboo along the length direction of the bamboo, so that the bamboo fibers can pass through by bending along the length direction, avoiding the tearing of the bamboo fibers by the roller pressing device 320 along the radial direction of the bamboo fibers; on the other hand, it is convenient for the rapid and orderly collection of the bamboo fibers.

[0054] It can be understood that the radial direction of the bamboo fibers is the width direction of the bamboo fibers, and the extension direction of the bamboo fibers is the length direction of the bamboo when it grows normally.

[0055] The orderly arrangement of the bamboo fibers can effectively reduce the space of the bamboo fibers during storage and transportation, improve the transportation efficiency of the bamboo fibers. Moreover, the orderly arrangement of the collected bamboo fibers also facilitates the operation of the operator during the subsequent use process, improves the use efficiency and reduces the production cost.

[0056] Referring to Figures 1 to 3 In the embodiment, in the horizontal direction, the conveying belt 210 is located on one side of the centers of the two rollers 3221. In the vertical direction, the second bearing part 213 and the inclined guide plate 222 can extend downward from the inclined part 212 to between the two rollers 3221, so that the bamboo chips can be accurately moved into the roller set 322 under the action of their own gravity, so that the length direction of the bamboo chips during crushing extends upward and downward, ensuring that the extension directions of the plurality of bamboo fibers produced are the same, facilitating the collection and storage of the bamboo fibers.

[0057] In some embodiments, the fixing member 221 extends along the width direction of the conveying belt 210. The plurality of inclined guide plates 222 are arranged at intervals along the width direction of the conveying belt 210, and the distance between any two adjacent inclined guide plates 222 is greater than the width of the bamboo piece, so as to facilitate the bamboo piece to pass through the poking guide device 220 and enter the rolling device 320, and the poking guide device 220 can guide multiple bamboo pieces at the same time, thereby improving the production efficiency of the production line.

[0058] In some embodiments, the conveying belt 210 includes the first bearing part 211 and the inclined part 212, and the second bearing part 213 is not required. The fixing member 221 is a fixed plate. The input end of the fixed plate is in communication with the output end of the inclined part 212, and the output end of the fixed plate is inclined downward from top to bottom towards the rolling device 320. The fixed plate is used to bear the bamboo piece output by the inclined part 212, so as to accurately guide the bamboo piece into the rolling device 320. At least one inclined guide plate 222 is arranged on the upper side of the fixed plate, so as to guide and adjust the position and angle of the bamboo piece when the bamboo piece slides on the fixed plate, so as to ensure that multiple bamboo pieces enter the rolling device 320 in the same direction, and ensure that the extension direction of the produced bamboo fiber is the same.

[0059] In other embodiments, the second bearing part 213 is not required. The extension direction of the fixed plate can be tangent to the outer periphery of an adjacent roller 3221, so as to facilitate the bamboo piece to pass through the fixed plate and enter the rolling device 320, keep multiple bamboo pieces entering the rolling device 320 at the same angle, improve the quality of the produced bamboo fiber, and make the bamboo fiber flexible to bend to pass through the rolling device 320, thereby avoiding the bamboo fiber from being torn.

[0060] In other embodiments, the conveying belt 230 includes the second bearing part 213. The fixing member 221 and the inclined guide plate 222 are arranged on the second bearing part 213. The extension direction of the second bearing part 213 can be tangent to the outer periphery of an adjacent roller 3221.

[0061] In other embodiments, the fixing member 221 is a fixed plate. The output end of the second bearing part 213 is in communication with the input end of the fixed plate, so that the bamboo piece on the inclined part 212 enters the fixed plate after passing through the second bearing part 213.

[0062] Referring to Figures 1 to 3 In this embodiment, the rolling and screening equipment 300 is arranged downstream of the conveying belt 210, so as to receive the bamboo piece output by the processing tank and roll and screen the bamboo piece to separate the bamboo fiber and the powder.

[0063] The rolling and screening equipment 300 includes a bearing frame 310 for bearing the rolling device 320 and the screening device 330, so as to facilitate the movement of the rolling device 320 and the screening device 330.

[0064] Referring to Figures 1 to 3 In the embodiment, the rolling device 320 comprises a connecting frame 321 and at least one roller set 322. The connecting frame 321 is fixedly connected to the bearing frame 310, so that the connecting frame 321 is stably and reliably connected to the bearing frame 310. The roller set 322 comprises two rollers 3221, which are rotatably connected to the connecting frame 321, and the rotation axes of the two rollers 3221 are arranged in parallel. The outer periphery of one of the two rollers 3221 is a rolling surface. The two rollers 3221 are relatively rotated to roll the softened bamboo chips to separate the fines in the bamboo chips.

[0065] When the bamboo chips enter the rolling device 320, the bamboo chips enter between the two rollers 3221 and are crushed under the pressure of the two rollers 3221, so that the bamboo chips are gradually refined to form bamboo fibers, and the lignin and other impurities in the bamboo chips are crushed to form fines under the pressure, thereby facilitating the subsequent separation of the bamboo fibers and the fines by the screening device 330.

[0066] In some embodiments, in a plane perpendicular to the rotation axis of the roller 3221, the two rollers 3221 in the same roller set 322 are relatively rotated, and the bamboo chips pass through the gap between the two rollers 3221 from top to bottom, so that the crushing direction of the bamboo chips is parallel to the extension direction of the bamboo fibers, thereby ensuring the production quality and the extension direction of the bamboo fibers.

[0067] In a plane perpendicular to the rotation axis of the roller 3221, the two rollers 3221 in the same roller set 322 are rotated from top to bottom on the side facing each other.

[0068] In some embodiments, the surface of the roller 3221 is roughened to facilitate the crushing of the bamboo chips and ensure the crushing quality of the bamboo chips, so that the bamboo fibers and the fines are fully separated and the purity of the bamboo fibers is improved. In addition, the rough surface of the roller 3221 can ensure smooth transportation of the materials such as bamboo chips and bamboo fibers during rolling.

[0069] In other embodiments, the surface of the roller 3221 can be processed into a rough surface by knurling or knife slotting.

[0070] Referring to Figures 1 to 3 In the embodiment, the rolling device 320 comprises a plurality of roller sets 322, which are arranged in multiple levels to facilitate multi-stage rolling and crushing of the bamboo chips, thereby facilitating separation of the fines and the bamboo fibers.

[0071] In the horizontal projection plane, the projection of the gap between the two rollers 3221 in the upper roller set 322 is located on one of the rollers 3221 in the lower roller set 322 and on the side facing each other of the two rollers 3221 in the lower roller set 322, so as to facilitate the lower roller set 322 to carry the bamboo fibers and the fines rolled by the upper roller set 322.

[0072] Since the bamboo fiber is in a slender silk structure, it has a certain flexibility. When the two rollers 3221 in the upper roller set 322 roll and crush the bamboo chips, the crushed bamboo chips move downward under the action of gravity and the friction force of the upper roller set 3221, so that the lower end of the bamboo chips first contacts the surface of one of the rollers 3221 of the lower roller set 322, facilitating the bending of the bamboo chips to contact the surface of the lower roller set 3221, avoiding the folding of the bamboo chips into the lower roller set 322, thereby avoiding the tearing of the bamboo fiber in the bamboo chips during rolling, improving the processing quality, processing efficiency and processing stability of the bamboo chips. Then, the bamboo chips move towards the gap between the two rollers 3221 of the lower roller set 322 under the action of their own gravity and the friction force of the lower roller set 3221, so as to crush the bamboo chips again to form bamboo fibers.

[0073] The bamboo chips are output to the screening device 330 after being crushed for multiple times, so as to fully separate the fines and bamboo fibers, improving the extraction efficiency and extraction quality of the bamboo fibers.

[0074] Referring to Figures 1 to 3 In this embodiment, the multiple roller sets 322 in the rolling device 320 are inclinedly arranged, that is, in the up-down direction, the rotation axes of the two rollers 3221 in the same roller set 322 are arranged in an up-down interval.

[0075] When the bamboo chips contact the top roller set 322 under the action of the inclined guide plate, the bamboo chips move downward under the action of their own gravity and the friction force of the rollers 3221, thereby facilitating the crushing of the bamboo chips by the roller set 322. After the bamboo chips are crushed for multiple times, when the bamboo chips are crushed and output by one of the upper roller sets 322, the lower end of the bamboo chips first contacts the surface of the lower roller 3221, so that the bamboo chips are in an arc shape, at least part of the bamboo chips are attached to the outer periphery of the same roller 3221, thereby avoiding the stacking of the bamboo chips when they fall from the upper side to the lower roller set 322, avoiding the extrusion and damage of the stacked bamboo chips by the roller set 322, ensuring the production of silk-like bamboo fibers, causing less damage to the bamboo fibers, and improving the production quality of the bamboo fibers.

[0076] Referring to Figures 1 to 3 In this embodiment, two roller sets 322 are arranged in the rolling device 320. The two roller sets 322 are arranged in an interval in the up-down direction, and the two rollers 3221 in the roller set 322 are inclinedly arranged, so that the four rollers 3221 in the rolling device are arranged at the four corners of a rectangle.

[0077] In some embodiments, the rolling device 320 can include a connecting frame 321, at least one roller 3221, and a bearing plate (not shown in the figure). The roller 3221 and the bearing plate are both connected to the connecting frame 321. The side of the bearing plate facing the roller 3221 is a rolling surface. When the bamboo chips move from the material guiding device 220 to the rolling device 320, the bamboo chips move between the roller 3221 and the bearing plate, so that the roller 3221 holds the bamboo chips on the bearing plate, and the bamboo chips are crushed under the pressure of the roller 3221, thereby separating the powder.

[0078] In other embodiments, the rolling device 320 can include a plurality of rollers 3221 and at least one bearing plate. The plurality of rollers 3221 can cooperate with the bearing plate to crush the bamboo chips.

[0079] In other embodiments, the bearing plate can be one, and the plurality of rollers 3221 are arranged relative to the same bearing plate. The plurality of rollers 3221 are arranged in sequence relative to the bearing plate to roll the bamboo chips in sequence.

[0080] In other embodiments, the bearing plate can be a plurality, and the plurality of bearing plates are arranged relative to the plurality of rollers 3221, respectively. A bearing plate and a roller 3221 can form a roller plate combination. The plurality of roller plate combinations can be arranged in a spaced manner in the up-down direction on the connecting frame 321.

[0081] In other embodiments, the rolling device 320 can include a plurality of rollers 3221 and at least one bearing plate, which can form at least one roller group 322 and at least one roller plate combination, respectively. The roller group 322 and the roller plate combination are arranged in the up-down direction to be able to crush the bamboo.

[0082] In some embodiments, the rolling device 320 can further include a first driving member. The first driving member is in transmission connection with the roller 3221 to drive the roller 3221 to rotate, so that the roller 3221 can rotate to crush the bamboo chips.

[0083] Referring to Figures 1 to 3 In this embodiment, the screening device 330 is arranged on the bearing frame 310. The screening device 330 is arranged downstream of the rolling device 320 to carry the bamboo chips crushed by the rolling device 320 and to screen the bamboo chips to separate the powder and the bamboo fibers.

[0084] In this embodiment, the screening device 330 includes a vibrating screen 331. The vibrating screen 331 is provided with a plurality of mesh holes. The vibrating screen 331 is vibrationally connected to the bearing frame 310, so that the powder can fall through the mesh holes to the lower side of the vibrating screen 331, thereby separating the powder and the bamboo fibers.

[0085] In some embodiments, the vibrating screen 331 can also include a stirring screen, a material stirring screen, or a blowing screen, etc. to separate the bamboo fibers and the powder.

[0086] Referring to Figures 1 to 3 In the embodiment, the screening device 330 further comprises a damping member 332. The damping member 332 is arranged between the bearing frame 310 and the vibrating screen 331 to assist the vibration of the vibrating screen 331, facilitate the screening of the fines, and reduce the influence of the vibration of the vibrating screen 331 on the bearing frame 310, avoid the vibration of the bearing frame 310 to drive the roller pressing device 320 to vibrate, avoid the fatigue fracture of the bearing frame 310, ensure the efficiency and safety of the roller pressing device 320 to press the bamboo chips, and prolong the service life of the roller screening equipment 300.

[0087] In some embodiments, the mesh size of the mesh in the vibrating screen 331 gradually increases in the upstream-to-downstream direction, so that the vibrating screen 331 can screen out fines of different fineness ranges, facilitating the graded use of the fines.

[0088] In some embodiments, the vibrating screen 331 is arranged obliquely to facilitate the movement of the bamboo fibers from upstream to downstream while vibrating to screen the fines, facilitate the subsequent processing and collection of the bamboo fibers, and improve the working efficiency of the production line.

[0089] Referring to Figure 1 In the embodiment, the screening device 330 can further comprise a collection hopper 333 connected to the bearing frame 310 and located on the lower side of the vibrating screen 331 to collect the fines falling in the mesh, facilitating the subsequent use of the fines.

[0090] In some embodiments, the collection hopper 333 can be multiple, and the multiple collection hoppers 333 are arranged along the extension direction of the vibrating screen 331 to adapt to multiple meshes of different mesh sizes and collect fines of different finenesses.

[0091] In the embodiment, the screening device 330 can further comprise a second driving member capable of driving the vibrating screen 331 to vibrate to screen the fines. In other embodiments, the second driving member can be a reciprocating air cylinder, a reciprocating oil cylinder, or a rotating motor with a cam, which can effectively drive the vibrating screen 331 to reciprocate.

[0092] Referring to Figure 3 and Figure 1 In the embodiment, the roller pressing device 320 and the screening device 330 can be arranged horizontally and spaced apart. A conveyor belt 230 is arranged between the roller pressing device 320 and the screening device 330. The conveyor belt 230 is arranged obliquely, the input end of the conveyor belt 230 is located on the lower side of the roller pressing device 320 to carry and transport the bamboo chips output by the roller pressing device 320, and the output end of the conveyor belt 230 is located on the upper side of the screening device 330 to output the bamboo chips to the screening device 330.

[0093] The structure of the conveying belt 230 can be arranged in reference to the structure of the conveying belt 210 described above. The conveying belt 230 can include the first bearing part 211 and the inclined part 212 described above.

[0094] In some embodiments, the output end of the conveying belt 230 is arranged in the up-down direction in a spaced manner with the screening device 330, so as to facilitate the bamboo chips to drop and impact on the screening device 330, so that the fines are separated from the bamboo fibers, and the screening device 330 screens the fines.

[0095] Referring to Figure 3 and Figure 1 In the present embodiment, a double-distributing screw device 340 can be further arranged between the roller pressing device 320 and the conveying belt 230. The input end of the double-distributing screw device 340 is in communication with the output end of the roller pressing device 320, and the output end of the double-distributing screw device 340 is in communication with the input end of the conveying belt 230. The double-distributing screw device 340 includes a box body 341 penetrating in the up-down direction and a double-screw structure 342 arranged in the box body 341. The double-screw structure 342 can more uniformly transport the bamboo fibers through the screw blades on the double-screw structure 342, and can further separate the bamboo fibers and the fines, avoid the bamboo fibers and the fines from being mixed and blocked, improve the screening efficiency of the subsequent screening device 330, and improve the extraction quality of the bamboo fibers.

[0096] In some embodiments, the double-distributing screw device 340 can further include a feeding hopper 343. The feeding hopper 343 is arranged between the box body 341 and the roller pressing device 320, so that the material output by the roller pressing device 320 enters the box body 341 through the feeding hopper 343, avoiding the material from leaking out.

[0097] In some embodiments, the double-distributing screw device 340 further includes a third driving member (not shown in the figure). The third driving member is in transmission connection with the double-screw structure 342, so as to drive the double-screw structure 342 to rotate around its own axis.

[0098] Referring to Figure 1 In the present embodiment, the roller pressing and screening equipment 300 can be multiple, and the multiple roller pressing and screening equipment 300 are sequentially in communication. The conveying belt 210 of the most upstream roller pressing and screening equipment 300 is in communication with the processing tank. The conveying belt 210 of the roller pressing and screening equipment 300 downstream of the most upstream roller pressing and screening equipment 300 is in communication with the screening device 330 of the upstream roller pressing and screening equipment 300, so as to realize multi-stage roller pressing and multi-stage screening of the bamboo chips, so that the bamboo fibers and the lignin are fully separated, and the extraction quality of the bamboo fibers is improved.

[0099] When the rolling device in the upstream rolling and screening device 300 crushes the bamboo chips, and the screening device 330 screens the fines, the fines can be effectively prevented from entering the downstream rolling and screening device 300, the invalid rolling is reduced, the rolling quality is improved, the fines on the bamboo fibers are more thoroughly rolled and separated, and the extraction quality of the bamboo fibers is ensured.

[0100] In some embodiments, the plurality of rolling and screening devices 300 can be connected by the conveying belt 210, so that the mixture of the screened bamboo fibers and fines output by the upstream screening device 330 can enter the downstream rolling device 320 through the conveying belt 210, thereby facilitating multi-stage rolling and screening of the bamboo chips and improving the processing efficiency.

[0101] It can be understood that the length of the bamboo chips processed by the production line of the present application can be adjusted according to the needs of the operator, so as to produce bamboo fibers of different lengths to meet the different needs of the downstream market.

[0102] Referring to Figure 3 and ​ , the present application provides a bamboo fiber extraction production line. The operator puts the bamboo chips into the processing tank and processes and softens them in the processing tank, so that the cellulose, hemicellulose and lignin in the bamboo chips are preliminarily decomposed.

[0103] After the bamboo chips in the processing tank are softened, they are output from the output end of the processing tank to the conveying belt 210, and the conveying belt 210 transports the bamboo chips. When the bamboo chips are conveyed to the upper side of the rolling device 320, the bamboo chips are supported and guided by the poking guide device 220, so that the bamboo chips move along the length direction to enter the rolling device 320.

[0104] After the bamboo chips enter the rolling device 320, the rolling device 320 crushes the bamboo chips. The crushed bamboo chips fall from the rolling device 320 to the screening device 330, and the screening device 330 screens the bamboo chips to separate the bamboo fibers from the fines, thereby screening out the bamboo fibers with good integrity, larger size and high quality, and avoiding the problem of smaller volume and more dust of the bamboo fibers when producing bamboo fibers by steam explosion of the bamboo chips.

[0105] Although the present application has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary, rather than limiting. Since the present application can be embodied in many different forms without departing from the spirit or essential characteristics thereof, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but rather should be construed broadly within the spirit and scope of the appended claims, as long as the claims or their equivalents fall within the scope of the claims. Therefore, all changes and modifications that come within the meaning and range of equivalents of the claims are to be embraced by the appended claims.

Claims

1. A bamboo fiber extraction production line, characterized in that: include: a processing tank for softening bamboo chips to preliminarily separate cellulose, hemicellulose and lignin in the bamboo chips; A roller-pressing and screening device comprises a roller-pressing device and a screening device; the roller-pressing device is arranged downstream of the processing tank, the roller-pressing device comprises at least one roller and a rolling surface, the roller can rotate around its own rotation axis to press the softened bamboo slices onto the rolling surface, so that the bamboo slices are crushed to form bamboo fibers and crushed powder, the bamboo fibers include the cellulose and the hemicellulose, and the crushed powder includes the lignin; the screening device is arranged downstream of the roller-pressing device, and the screening device can screen the bamboo fibers and the crushed powder.

2. The production line according to claim 1, characterized in that: The rolling device includes a connecting frame and at least one roller group, the roller group includes two rollers, both of which are rotatably connected to the connecting frame, and the rotation axes of the two rollers are arranged in parallel. The outer periphery of one of the rollers is the rolling surface; the two rollers rotate relative to each other to roll the softened bamboo slices to separate the fragments in the bamboo slices.

3. The production line according to claim 2, characterized in that: The rolling device includes a plurality of roller groups, and the plurality of roller groups are arranged up and down; On the horizontal projection plane, the projection of the gap between the two rollers in the upper roller group is located on one of the rollers of the lower roller group and on the side facing each other of the two lower rollers, so that the lower roller can carry the bamboo fibers and the crushed particles after being rolled by the upper roller group.

4. The production line according to claim 1, characterized in that: The rolling device includes at least one roller and a supporting plate, and a side of the supporting plate facing the roller is the rolling surface.

5. The production line according to claim 1, characterized in that: There may be multiple roller-pressing and screening devices, and the multiple roller-pressing and screening devices are connected in sequence.

6. The production line according to claim 1, characterized in that: The surface of the roller is processed into a rough surface.

7. The production line according to claim 1, characterized in that: A material-dividing guide device is provided upstream of the rolling device, and the material-dividing guide device is located on the upper side of the rolling device. The material-dividing guide device is tilted to support and guide the bamboo pieces into the rolling device along the fiber growth direction.

8. The production line according to claim 1, characterized in that: The output end of the processing tank is located below the input end of the rolling device. A conveyor belt is provided between the processing tank and the rolling device. The conveyor belt extends obliquely from the processing tank toward the rolling device to input the softened bamboo slices into the rolling device.

9. The production line according to claim 1, characterized in that: The processing tank is a heating tank, which is used to perform high-temperature and high-pressure softening treatment on the bamboo slices.

10. The production line according to claim 1, characterized in that The processing tank is a chemical tank, and the chemical tank is used to contain alkali solution for soaking and softening the bamboo slices.

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