A bamboo chip steam explosion equipment and method

Abstract

The present application provides a kind of bamboo piece steam explosion equipment and method, including equipment body and pressure maintaining mechanism, the pressure maintaining mechanism includes the steam pipeline being arranged in equipment body and the valve group being fixed on steam pipeline;It also includes the positioning mechanism being movably arranged in equipment body for carrying the positioning mechanism of bamboo piece;And the transmission part being movably arranged in equipment body is connected with positioning mechanism;Bamboo piece is placed to positioning mechanism fixed, steam is supplemented to equipment body by steam pipeline and pressure is maintained, then control valve group makes equipment body steam explosion, while in the process of pressure maintaining and steam explosion, transmission part pulls positioning mechanism to move in equipment body;The present application makes bamboo piece in the steam explosion process of equipment body in the function of active state, to improve the utilization rate of steam explosion bamboo piece and steam explosion efficiency, and solve the problem of destroying bamboo piece shape in the process of steam explosion.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steam explosion, in particular to a bamboo chip steam explosion equipment and method. BACKGROUND

[0002] The main components of bamboo are cellulose, hemicellulose, lignin, pectin and other substances, among which the content of cellulose is less, and the contents of lignin and hemicellulose are higher. The lignocellulose raw material is widely used in pulp-making and other industrial fields. In order to effectively separate the lignocellulose in bamboo, steam explosion is often used.

[0003] Steam explosion (steam explosion for short) pretreatment is to maintain the biomass raw material at high temperature and high pressure for a certain time, and then realize the comprehensive effect of acid hydrolysis, thermal degradation, mechanical fracture, hydrogen bond destruction and structure rearrangement through instantaneous pressure relief process, so as to separate the raw material components and change the structure. In addition, steam explosion destroys the steric hindrance effect of lignin on cellulose and hemicellulose. The treated material is fluffy, and the accessibility and contact area of the substrate are greatly increased, which creates favorable conditions for the use of effective components in natural cellulose.

[0004] Chinese patent application No. CN202011428231.4 discloses a biomass steam explosion device, which comprises a steam explosion device, an internal steam main pipeline, an internal steam pipeline in the tank body, a steam-driven linkage device, a material turning device and a connecting ring. In this scheme, the steam can uniformly pass through the material, increase the penetration of the material accumulated at the bottom and the edge, and avoid the adhesion of the raw material to the inner wall. Finally, no additional power equipment is needed to realize the material turning work.

[0005] However, in this technical scheme, the material is evenly distributed in the steam explosion device by turning the material, which solves the problem of material accumulation and extrusion, so as to ensure the smooth flow of steam in the material during the steam explosion process. However, the material turning device still causes local material temperature extrusion damage when it contacts the material in the steam explosion device. At the same time, the interaction between the material and the device during operation can damage the shape of the material, which is not suitable for materials with certain shape characteristics. SUMMARY

[0006] The purpose of the present application is to overcome the shortcomings of the prior art, provide a bamboo chip steam explosion equipment and method, which realizes the function of the bamboo chip in the steam explosion process in the equipment body by the positioning mechanism cooperating with the transmission part, so as to improve the utilization rate and steam explosion efficiency of the bamboo chip, and solve the problem of damaging the shape of the bamboo chip in the steam explosion process.

[0007] In order to achieve the above purpose, the present application provides the following technical scheme:

[0008] A bamboo chip steam explosion equipment, comprising an equipment body, further comprising:

[0009] a pressure maintaining mechanism, the pressure maintaining mechanism comprising a steam pipeline arranged in the device body and a valve group fixed on the steam pipeline;

[0010] a positioning mechanism, the positioning mechanism movably arranged in the device body for carrying the bamboo pieces; and

[0011] a transmission part, the transmission part movably arranged in the device body and connected with the positioning mechanism;

[0012] the bamboo pieces are placed in the positioning mechanism and fixed, steam is supplied to the device body through the steam pipeline for pressure maintaining, then the valve group is controlled to make the device body perform steam explosion, and in the process of pressure maintaining and steam explosion, the transmission part drags the positioning mechanism to move in the device body.

[0013] Further, the transmission part comprises:

[0014] a transmission rod group, the transmission rod group comprising one or more of a first rod group for adjusting the position of the positioning mechanism or a second rod group for adjusting the posture of the positioning mechanism, the first rod group and the second rod group being movably arranged in the device body, respectively; and

[0015] a transmission part, the transmission part movably arranged on the transmission rod group and in transmission connection with the positioning mechanism.

[0016] As a preferred, it further comprises a driving part for dragging the transmission part to move, the driving part comprising a first driving part for actively dragging the transmission rod group to move and a second driving part for passively dragging the transmission rod group to move;

[0017] the first driving part is movably arranged outside the device body and in transmission connection with the transmission rod group, and the second driving part is fixedly arranged inside the device body and in transmission connection with the transmission rod group.

[0018] Further, the second driving part further comprises a pressure maintaining driving block and a steam explosion driving block;

[0019] the pressure maintaining driving block comprises a cylinder and a cylinder column, the cylinder and the cylinder column being movably connected and fixedly arranged on the positioning mechanism and the transmission rod group, respectively, an air cavity in the cylinder being in communication with the inside of the device body, and the air cavity in the cylinder being fixedly arranged with an air bag filled therein;

[0020] the steam explosion driving block comprises a slider group fixedly arranged between the device body and the transmission rod group, the moving direction of the slider group being parallel to the flow direction of the gas at the moment of steam explosion.

[0021] As a preferred, the steam pipeline is arranged along the horizontal plane in the device body, the air inlet on the steam pipeline is arranged in the vertical direction, and the air outlet on the steam pipeline is arranged in the horizontal direction.

[0022] Further, the positioning mechanism comprises one or more of a clamping assembly for fixing the bamboo pieces or a wrapping assembly for placing the bamboo pieces;

[0023] The clamping assembly is detachably installed in the equipment body, and the wrapping assembly is stacked in the equipment body.

[0024] Further, the clamping assembly comprises:

[0025] a clamping frame arranged on the cross section of the equipment body;

[0026] a clamping clip movably arranged outside the clamping frame for mounting the clamping frame to the transmission rod group in the equipment body; and

[0027] a clamping piece movably arranged inside the clamping frame and arranged in groups for clamping the bamboo pieces.

[0028] Further, the wrapping assembly comprises:

[0029] a net clip arranged in a disc shape and arranged in pairs for loading the bamboo pieces;

[0030] a positioning portion arranged in a linear arrangement on the surface of the net clip;

[0031] a locking portion arranged in a uniform distribution on the surface of the net clip.

[0032] As a preferred, the positioning portion and the locking portion adjacent to each other are arranged in a tilted coplanar manner from the bottom end of the recess of the positioning portion to the top end of the protrusion of the locking portion, and the tilted coplanar positioning portion and the locking portion gradually rise from the edge of the disc-shaped net clip to the center direction.

[0033] The present application also provides a method for bamboo piece steam explosion using the bamboo piece steam explosion equipment.

[0034] S100, cutting: cleaning the surface of the bamboo and removing the nodes, and cutting under the condition of air drying to obtain bamboo pieces, wherein the bamboo pieces with a length greater than 10 cm are large bamboo pieces, and the bamboo pieces with a length less than 10 cm are small bamboo pieces;

[0035] S200, soaking: immersing the cut bamboo pieces in water at 20℃ for more than 1h by binding weights or being pressed by weights;

[0036] S300, pressure maintaining: then placing the bamboo pieces after pre-soaking into the clamping piece of the clamping assembly or the net clip of the wrapping assembly according to the size, and then supplementing steam through the steam pipeline to make the air pressure in the equipment body reach 3MPa, and controlling the pressure maintaining time within 90-150s;

[0037] S400, steam explosion: during the process of S300, the bamboo pieces in the device body are in an active state with the positioning mechanism by operating the transmission rod group, and when the pressure holding time is reached, the device body is depressurized within 0.1s to complete the steam explosion;

[0038] S500, collection: the sample after steam explosion is collected together with the steam explosion black liquor, and is filtered and air-dried through a funnel for standby, and then bamboo fiber samples are obtained by extracting with distilled water for more than 3h.

[0039] The present application has the advantages of:

[0040] (1) The present application uses the transmission part to pull the net clamp of the positioning mechanism to form a smooth airflow channel in the device body for the bamboo pieces arranged in disorder, so that the high-pressure steam released instantaneously in the steam explosion is expanded from the bamboo piece organization and released outside the device body, the air release time of the steam explosion is reduced, and the processing effect of the bamboo piece steam explosion is improved.

[0041] (2) The present application fixes the bamboo pieces by using the positioning mechanism to avoid mutual extrusion of multiple bamboo pieces during the steam explosion process, and forms bamboo piece residues in the device body, so that the device body can quickly perform the next batch of bamboo piece explosion operation.

[0042] (3) The present application adjusts the position and posture of the multiple net clamps in the positioning mechanism through the transmission rod group, so that enough high-pressure steam flow space is maintained between adjacent bamboo pieces, or enough bamboo piece surface is exposed, so as to respectively adapt to the working conditions of improving the utilization rate or the efficiency of the bamboo piece steam explosion.

[0043] (4) The present application makes the clamping pieces in the positioning mechanism in the device body respectively synchronously in a moving state during the pressure holding process and the steam explosion instant, so as to improve the penetration of high-pressure steam and enhance the steam explosion effect of the bamboo pieces.

[0044] (5) The present application uses the clamping assembly and the wrapping assembly in the positioning mechanism to respectively load bamboo pieces of different specifications, sizes and quantities for targeted steam explosion treatment, and respectively through the detachable installation of the clamping assembly and the swinging of the wrapping assembly, so as to improve the convenience of the bamboo piece steam explosion operation.

[0045] In summary, the present application has the advantages of improving the utilization rate and the steam explosion efficiency of the bamboo pieces in the steam explosion, optimizing the steam explosion operation of the bamboo pieces, etc. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 It is a first perspective view of the overall structure of the present application;

[0047] Figure 2 It is an internal structure schematic diagram of the present application in the state of the clamping assembly;

[0048] Figure 3 The schematic diagram of partial structure of the clamping assembly of the present application;

[0049] Figure 4 The schematic diagram of internal structure of the present application in the state of wrapping assembly;

[0050] Figure 5 The schematic diagram of the structure of the present application in the running state of the whole transmission part;

[0051] Figure 6 The schematic diagram of the second perspective of the whole structure of the present application;

[0052] Figure 7 The schematic diagram of the structure of the net clamp of the present application;

[0053] Figure 8 The schematic diagram of the structure of the net clamp of the present application;

[0054] Figure 9 The Figure 2 The partial enlarged schematic diagram of A in the middle;

[0055] Figure 10 The Figure 5 The partial enlarged schematic diagram of B in the middle;

[0056] Figure 11 The flow chart of the bamboo piece steam explosion method of the present application. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only one device embodiment of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0058] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and 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 should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0059] Example 1

[0060] like Figures 1-2 As shown, this embodiment provides a bamboo strip steam explosion device, including a device body 1, and further including:

[0061] Pressure holding mechanism 2, the pressure holding mechanism 2 includes a steam pipeline 21 arranged in the equipment body 1 and a valve group 22 fixed on the steam pipeline 21;

[0062] Positioning mechanism 3, movable within the device body 1, is used to support the bamboo strips; and

[0063] The transmission part 4, which is connected to the positioning mechanism 3, is movably disposed within the equipment body 1;

[0064] The bamboo strips are placed in the positioning mechanism 3 and fixed. Steam is supplied to the equipment body 1 through the steam pipe 21 to maintain pressure. Then, the valve group 22 is controlled to cause the equipment body 1 to undergo steam explosion. At the same time, during the pressure maintenance and steam explosion process, the transmission unit 4 pulls the positioning mechanism 3 to move within the equipment body.

[0065] In the present embodiment, a plurality of bamboo pieces are placed on the positioning mechanism 3 in the steam explosion device body 1, the bamboo pieces are fixed in the device body 1 by the positioning mechanism 3 such as the net clamp 320, and the bamboo pieces are placed in a staggered state to avoid stacking between the bamboo pieces, so that the surfaces of each bamboo piece are exposed in the space of the device body 1, and the transmission part 4 such as the transmission rod group 41 hinged to the net clamp 320 of the positioning mechanism 3 changes the position and angle of the net clamp 320 in the device body 1 through action, so that the surfaces of the bamboo pieces are respectively directed to different angles, so that the steam supplied by the steam pipeline 21 is evenly distributed in the device body 1 and penetrates into the inside of the bamboo piece organization during the pressurization process, so as to improve the steam explosion effect of the whole bamboo piece. At the same time, during the steam explosion process, the staggered bamboo pieces form a smooth airflow channel in the device body 1 by the transmission part 4 pulling the net clamp 320 of the positioning mechanism 3, which facilitates the high-pressure steam released at the moment of steam explosion to expand and release from the bamboo piece organization outside the device body 1, further reduces the air release time of steam explosion, and thus improves the processing effect of the steam explosion of the bamboo pieces.

[0066] As shown in Figures 2-3 , the transmission part 4 comprises:

[0067] The transmission rod group 41 comprises one or more of a first rod group 411 for adjusting the position of the positioning mechanism 3 or a second rod group 412 for adjusting the attitude of the positioning mechanism 3, and the first rod group 411 and the second rod group 412 are respectively arranged in the device body 1; and

[0068] The transmission part 42 is movably arranged on the transmission rod group 41 and is in transmission connection with the positioning mechanism 3.

[0069] In this embodiment, the optimal process parameters for steam explosion of different specifications of bamboo chip materials are different, and in different production conditions, the utilization rate of bamboo chips for material extraction by steam explosion and the steam explosion time need to be compromised. In the pressure maintaining process before steam explosion, for the condition that needs to improve the utilization rate of bamboo chips, enough space is reserved between the bamboo chips fixed in the net clamp 320 of the positioning mechanism 3, for example, the distance between adjacent bamboo chips is greater than half of the projection area of the bamboo chips in the airflow direction during steam explosion. At this time, through the first rod group 411, such as the positioning bolt 4110 installed at different positions of the lead screw, the positioning bolt 4110 is connected with the net clamp 320 of the positioning mechanism 3 through the transmission member 42, the distance between adjacent net clamps 320 in the positioning mechanism 3 is controlled, the steam penetration in the bamboo chip material during the pressure maintaining process is maintained, and the high-pressure steam expanded from the bamboo chip material at the moment of steam explosion is fully released, the interference of adjacent bamboo chips to the high-pressure steam flow is reduced, and the steam explosion of the device body 1 to the bamboo chips is in the utilization priority state; for the condition that needs to improve the production efficiency of bamboo chips, the distance between adjacent bamboo chips is reduced, the steam penetration rate of a single bamboo chip is reduced, the number of bamboo chips subjected to steam penetration is increased, the device body 1 performs steam explosion on a large number of bamboo chips at a time, and the steam explosion of the device body 1 to the bamboo chip material is in the efficiency priority state.

[0070] It is worth noting that for the steam exploded bamboo chip material, according to the steam flow path at the moment of steam explosion in the device body 1, the second rod group 412, such as another lead screw connected to the net clamp 320 of the positioning mechanism 3 through the transmission member 42, is arranged at different positions around the positioning mechanism 3, so that the lead screws of the first rod group 411 and the second rod group 412 form a lead screw pair, a relative displacement is generated between the lead screws of the first rod group 411 and the second rod group 412, and the second rod group 412 is combined with the first rod group 411 to drive the net clamp 320 of the positioning mechanism 3 to change its angle posture, and then the bamboo chips form a specific inclined gap in the device body 1, promote the flow of high-pressure steam, and enhance the steam explosion effect of the bamboo chips.

[0071] As shown in Figure 2 , 9 , the steam pipeline 21 is arranged along the horizontal plane in the device body 1, the gas inlet 211 on the steam pipeline 21 is arranged in the vertical direction, and the gas outlet 212 on the steam pipeline 21 is arranged in the horizontal direction.

[0072] During the steam explosion of bamboo strips, the horizontally arranged steam pipes 21 and the gas inlets 211 distributed on them can evenly replenish high-pressure steam at various locations within the equipment body 1. The gas inlets 211 are positioned vertically, and gravity causes the high-pressure steam replenished from the steam pipes 21 to settle into the positioning mechanisms 3 at various locations within the equipment body 1. During the exhaust process at the moment of steam explosion, the horizontally arranged exhaust port 212 keeps the airflow within the equipment body 1 in a horizontal flow direction. This causes the transmission rod assembly 41, which is also arranged horizontally, to exert gravity on the equipment body 1. This enhances the force of the air pressure and airflow during the pressure holding process and the moment of steam explosion on the pressure holding drive block 521 and the steam explosion drive block 522 in the second drive component 52, ensuring the execution of the positioning mechanism 3 within the equipment body 1, thereby achieving the steam explosion effect of the bamboo strips.

[0073] Example 2

[0074] like Figures 1-3 As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 2 and Embodiment 1 is as follows:

[0075] It also includes a drive unit 5 for moving the traction transmission unit 4, the drive unit 5 including a first drive member 51 for moving the active traction transmission rod group 41 and a second drive member 52 for moving the driven traction transmission rod group 41.

[0076] The first driving member 51 is movably disposed on the outside of the equipment body 1 and is connected to the transmission rod group 41 in a transmission manner, and the second driving member 52 is fixedly disposed on the inside of the equipment body 1 and is connected to the transmission rod group 41 in a transmission manner.

[0077] In this embodiment, when the equipment body 1 performs steam explosion on the bamboo strips, the power source of the drive unit 5 controls the movement of the transmission unit 4 to adjust the position and posture of the bamboo strips in the positioning mechanism 3. The first drive member 51 is installed on the outside of the equipment body 1 and passes through the drive shaft connecting the equipment body 1 and the transmission rod group 41. The rotation of the drive shaft causes the transmission rod group 41 to rotate, which drives the positioning mechanism 3 to change its movement, thereby controlling the position and posture of the bamboo strips in the equipment body 1. The second drive member 52 is installed in the equipment body 1 as a drive block, which drives the transmission rod group 41 to move inside the equipment body 1. During the pressure holding process of replenishing high-pressure steam in the equipment body 1 and the instant of depressurization during steam explosion, the drive block is deformed synchronously by the change in air pressure, which drives the position and posture of the mesh clamp 320 in the positioning mechanism 3 to change, thereby enhancing the steam explosion effect of the bamboo strips.

[0078] like Figures 5-6 As shown in Figures 1 and 10, the second driving component 52 further includes a pressure-holding driving block 521 and a steam explosion driving block 522;

[0079] The pressure-holding drive block 521 includes an air cylinder 5210 and a cylinder column 5211. The air cylinder 5210 and cylinder column 5211, which are movably connected, are respectively fixed on the positioning mechanism 3 and the transmission rod group 41. The air cavity inside the air cylinder 5210 is connected to the inside of the equipment body 1. An air bag 5212 is fixedly installed in the air cavity of the air cylinder 5210.

[0080] The steam explosion drive block 522 includes a slider group 5220 fixed between the equipment body 1 and the transmission rod group 41. The movement direction of the slider group 5220 is parallel to the flow direction of the gas at the moment of the steam explosion.

[0081] In this embodiment, during the pressure holding process, the pressure holding drive block 521 is arranged on one side of the steam pipe 21 inside the equipment body 1, and the two ends of the deformation direction of the pressure holding drive block 521 are respectively fixed on the positioning mechanism 3 and the transmission rod group 41. Before the steam pipe 21 is replenished with high-pressure steam, the transmission rod group 41 and the mesh clamp 320 of the positioning mechanism 3 are left with sufficient distance from the steam pipe 21, so that the high-pressure steam can quickly diffuse to all parts of the equipment body 1. During the process of the steam pipe 21 replenishing the equipment body 1 with high-pressure steam, the air bladder 5212 in the pressure holding drive block 521 is affected by the increased air pressure inside the equipment body 1 and undergoes expansion and contraction deformation, so that the air cylinder 5210 and the cylinder 5211 slide relative to each other, thereby driving the transmission rod group 41 to move closer to the steam pipe 21, so that the bamboo strip connected to the positioning mechanism 3 of the transmission rod group 41 is located in the middle area inside the equipment body 1, so that the pressure holding drive block 521 is used to adjust the size of the accommodating space next to the steam pipe 21 inside the equipment body 1.

[0082] During the steam explosion process, the steam explosion drive block 522 is slidably connected to the slider group 5220 between the transmission rod group 41 and the equipment body 1. At the instant of steam explosion in the equipment body 1, the flow of high-pressure steam causes the transmission rod group 41 and its positioning mechanism 3 to move, reducing the interference of the positioning mechanism 3 on the airflow channel of high-pressure steam at the instant of steam explosion. The pressure holding drive block 521 and the steam explosion drive block 522 respectively make the positioning mechanism 3 in the equipment body 1 move under different working conditions, thereby improving the steam explosion effect of bamboo strips.

[0083] Example 3

[0084] like Figures 2-4 As shown, components that are the same as or corresponding to those in Embodiment 2 are referred to using the same reference numerals as those in Embodiment 1. For simplicity, only the differences from Embodiment 2 are described below. The difference between Embodiment 3 and Embodiment 2 is as follows:

[0085] The positioning mechanism 3 includes one or more of a clamping assembly 31 for fixing the bamboo strips or a wrapping assembly 32 for placing the bamboo strips.

[0086] The clamping assembly 31 is detachably installed in the equipment body 1, and the wrapping assembly 32 is stacked in groups in the equipment body 1.

[0087] In this embodiment, for large pieces of bamboo chips, the clamping mode is used to fix them to the clamping assembly 31 such as a clamping strip, and the position and posture of each bamboo chip in the steam explosion process are accurately controlled, so that the bamboo chips obtain better steam explosion effect, and the clamps of the clamping assembly 31 can be detachably installed in the equipment body 1, which facilitates the overall taking and placing of the clamping assembly 31 and the bamboo chip material when the bamboo chip material is loaded and unloaded in the equipment body 1, and the operation of loading and unloading the bamboo chip outside the equipment body 1, thereby improving the convenience of operation.

[0088] For small pieces of bamboo chips, the wrapping assembly 32 such as the net clamp 320 is used for loading, and only small pieces of bamboo chips are poured into the net clamp 320, the net clamps 320 are linearly stacked in the equipment body 1 in the same posture, the distance between adjacent net clamps 320 is used as a space for high-pressure steam flow, and the transmission part 4 drives the net clamps 320 to swing to shake the small pieces of bamboo chips placed therein and promote the penetration of high-pressure steam.

[0089] As shown in Figure 3 The clamping assembly 31 comprises:

[0090] The clamping frame 310 is arranged on the cross section of the equipment body 1.

[0091] The clamping clamp 311 is movably arranged outside the clamping frame 310 and is used to install the clamping frame 310 on the transmission rod group 41 in the equipment body 1.

[0092] The clamping piece 312 is movably arranged inside the clamping frame 310 and is used to clamp the bamboo chips.

[0093] In this embodiment, the clamping frame 310 is detachably installed in the equipment body 1 through the clamping clamp 311, and the clamping pieces 312 inside the clamping frame 310 are used to group-distribute the clamping pieces 312 to form any two sides of a rectangular profile, which are used to clamp large pieces of bamboo chips, and the clamping frame 310 is adjusted by the transmission rod group 41 to change the position and posture of the bamboo chips in the equipment body 1; and the clamping clamp 311 and the clamping piece 312 are movably arranged on the inner and outer sides of the clamping frame 310, for example, a group of symmetrical clamping clamps 311 and clamping pieces 312 are arranged, which are respectively fixed on the clamping frame 310 and the clamping object, so as to fix the bamboo chips of any shape in the clamping frame 310, and the two points of any fixed interval on the clamping frame 310 are installed on the transmission rod group 41 in the equipment body 1, thereby increasing the range of adjustable posture.

[0094] As shown in Figure 7 The wrapping assembly 32 comprises:

[0095] Net clamps 320, pairs of disc-shaped net clamps 320 are used to load bamboo chips;

[0096] Positioning parts 321, the positioning parts 321 are linearly arranged recesses arranged on the surface of the net clamp 320;

[0097] Locking parts 322, the locking parts 322 are uniformly distributed protrusions arranged on the surface of the net clamp 320.

[0098] In this embodiment, a plurality of small pieces of bamboo chips are poured into the disc-shaped net clamp 320, and the pairs of net clamps 320 are respectively connected to the adjacent positioning bolts 4110 of the transmission rod set 41, and the rotation directions of the bolts are opposite. When loading the bamboo chips, the disc-shaped edges of the pairs of net clamps 320 are in contact, and the bamboo chips in the space formed by the pairs of net clamps 320 are in an underloaded state. Then, through the action of the first rod set 411 and the second rod set 412 in the transmission rod set 41, the net clamp 320 is swung, and the adjacent positioning bolts 4110 drive the pairs of net clamps 320 to move towards each other. In this process, the small pieces of bamboo chips in the net clamp 320 are positioned by being clamped into the recesses, and the uniformly distributed protrusions on the surface of the net clamp 320 increase the exposed area of the bamboo chips, facilitating the penetration of high-pressure steam.

[0099] As shown in Figure 8 , the adjacent positioning parts 321 and locking parts 322 are arranged in a tilted coplanar manner from the bottom end of the recess of the positioning part 321 to the top end of the protrusion of the locking part 322, and the tilted coplanar positioning parts 321 and locking parts 322 gradually rise from the edge of the disc-shaped net clamp 320 to the center.

[0100] In this embodiment, by arranging the recess of the positioning part 321 and the protrusion of the locking part 322 in a tilted coplanar manner, the plurality of small pieces of bamboo chips placed in the net clamp 320 enter the positioning part 321 and the locking part 322 during the swinging process, and tend to be in a posture towards the center of the disc-shaped net clamp 320. On the one hand, this allows more bamboo chip surfaces to be exposed in the device body 1 with limited cross-sectional area, and on the other hand, it utilizes the tilted gaps between the bamboo chips to facilitate the flow of high-pressure steam to the steam outlet of the steam pipeline 21 at the moment of steam explosion, thereby improving the steam explosion effect of the bamboo chips.

[0101] Embodiment Four

[0102] As shown in Figure 11 , the present embodiment provides a method for bamboo chip steam explosion using a bamboo chip steam explosion device, comprising the following steps:

[0103] S100, cutting: cleaning the surface of the bamboo and removing the nodes, and cutting into bamboo chips under dry conditions for standby use, wherein bamboo joints with a length greater than 10 cm or bamboo chips with a length greater than 10 cm are used as large bamboo chips, and bamboo chips with a length less than 10 cm are used as small bamboo chips;

[0104] S200, soaking: the cut bamboo pieces in S100 are immersed in water at 20°C for pre-soaking for more than 1 hour by binding weights or being pressed by weights;

[0105] S300, pressure maintaining: the bamboo pieces after pre-soaking are placed in the clamping pieces 312 of the clamping assembly 31 or the net clamps 320 of the wrapping assembly 32 according to their size, then steam is supplemented through the steam pipeline 21 to make the air pressure in the equipment body 1 reach 3 MPa, and the pressure maintaining time is controlled within 90-150 s;

[0106] S400, steam explosion: during the process of S300, the bamboo pieces in the equipment body 1 are in the active state with the positioning mechanism 3 by operating the transmission rod group 41, when the pressure maintaining time is reached, the equipment body 1 is depressurized within 0.1 s to complete steam explosion;

[0107] S500, collection: the sample after steam explosion is collected together with the steam explosion black liquor, and is filtered through a funnel and air-dried for standby, then bamboo fiber samples are obtained by extracting with distilled water for more than 3 hours.

[0108] The above only describes the preferred embodiments of the present application and is not used to limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A bamboo culm steam explosion device, comprising a device body, characterized in that, Further comprising: a pressure maintaining mechanism, the pressure maintaining mechanism comprising a steam pipeline arranged in the device body and a valve group fixed on the steam pipeline; a positioning mechanism, the positioning mechanism movably arranged in the device body for carrying the bamboo chips; and a transmission part, the transmission part movably arranged in the device body and connected with the positioning mechanism. The bamboo chips are placed in the positioning mechanism, steam is supplied to the device body through the steam pipeline for pressure maintaining, then the valve group is controlled to make the device body perform steam explosion, and in the process of pressure maintaining and steam explosion, the transmission part drags the positioning mechanism to move in the device body. The transmission part comprises: a transmission rod group, the transmission rod group comprising a first rod group for adjusting the position of the positioning mechanism and a second rod group for adjusting the posture of the positioning mechanism, the first rod group and the second rod group being movably arranged in the device body, respectively; and a transmission part, the transmission part movably arranged on the transmission rod group and in transmission connection with the positioning mechanism. Further comprising a driving part for dragging the transmission part to move, the driving part comprising a first driving part for driving the transmission rod group to move and a second driving part for driving the transmission rod group to move. The first driving part is movably arranged outside the device body and in transmission connection with the transmission rod group, and the second driving part is fixedly arranged inside the device body and in transmission connection with the transmission rod group. The second driving part further comprises a pressure maintaining driving block and a steam explosion driving block. The pressure maintaining driving block comprises a gas cylinder and a cylinder column, the gas cylinder and the cylinder column being movably connected and fixedly arranged on the positioning mechanism and the transmission rod group, respectively, the gas cavity in the gas cylinder being in communication with the inside of the device body, and the gas cavity in the gas cylinder being fixedly arranged and filled with a gas bag. The steam explosion driving block comprises a slider group fixedly arranged between the device body and the transmission rod group, the moving direction of the slider group being parallel to the flow direction of the gas at the moment of steam explosion.

2. The bamboo chip steam explosion device according to claim 1, wherein the steam pipeline is arranged along the horizontal plane in the device body, the air inlet on the steam pipeline is arranged in the vertical direction, and the air outlet on the steam pipeline is arranged in the horizontal direction.

3. The bamboo chip steam explosion device according to claim 1, wherein the positioning mechanism comprises a clamping assembly for fixing the bamboo chips or a wrapping assembly for placing the bamboo chips; the clamping assembly is detachably installed in the device body, and the wrapping assemblies are stacked in groups in the device body.

4. The bamboo chip steam explosion device according to claim 3, wherein the clamping assembly comprises: a clamping frame arranged on the cross section of the device body; a clamping hoop movably arranged outside the clamping frame and used for installing the clamping frame on the transmission rod group in the device body; and clamping pieces movably arranged inside the clamping frame and arranged in groups and used for clamping the bamboo chips.

5. The bamboo chip steam explosion device according to claim 3, wherein the wrapping assembly comprises: a net clamp, a pair of net clamps arranged in a disc shape and used for loading the bamboo chips; a positioning part, the positioning part being a linear arrangement of recesses arranged on the surface of the net clamp; a locking part, the locking part being a convex arranged on the surface of the net clamp.

6. The bamboo chip steam explosion device according to claim 5, wherein The positioning part and the locking part are arranged in a same plane and gradually rise from the edge to the center of the disc-shaped net clamp.

7. A method for steam explosion of bamboo chips using the bamboo chip steam explosion apparatus according to any one of claims 4-6, characterized in that, The method comprises the following steps: S100, cutting: the surface of the bamboo is washed and the nodes are removed, and the bamboo is cut into pieces under the condition of air drying, wherein the whole bamboo node or the bamboo piece with a length greater than 10 cm is used as a large bamboo piece, and the bamboo piece with a length less than 10 cm is used as a small bamboo piece; S200, soaking: the cut bamboo pieces in S100 are soaked in water at 20 DEG C for more than 1 h by means of binding weights or being pressed by weights; S300, pressure maintaining: then, the bamboo pieces after the pre-soaking are placed in the clamping pieces of the clamping assembly or the net clamp of the wrapping assembly according to the size, steam is supplied through the steam pipeline to make the air pressure in the equipment body reach 3 MPa, and the pressure maintaining time is controlled to be within 90-150 s; S400, steam explosion: in the process of S300, the bamboo pieces in the equipment body are made to be in a moving state by operating the transmission rod group, when the pressure maintaining time is reached, the equipment body is depressurized within 0.1 s, and the steam explosion is completed; S500, collecting: the sample after the steam explosion is collected together with the steam explosion black liquor, filtered through a hopper, air dried, and used again, and the bamboo fiber sample is obtained by extracting in distilled water for more than 3 h. S400, steam explosion: in the process of S300, the bamboo pieces in the equipment body are made to be in a moving state by operating the transmission rod group, when the pressure maintaining time is reached, the equipment body is depressurized within 0.1 s, and the steam explosion is completed; S500, collecting: the sample after the steam explosion is collected together with the steam explosion black liquor, filtered through a hopper, air dried, and used again, and the bamboo fiber sample is obtained by extracting in distilled water for more than 3 h.

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