A bio-based fiber raw material composite mixing device

Abstract

The utility model discloses a kind of bio-based fiber raw material composite mixing equipment, including mixing cylinder, sealing mounting bracket and rotating shaft;Sealing mounting bracket is installed at the top of mixing cylinder, the top of sealing mounting bracket is equipped with speed reducer, and the top of speed reducer is connected with driving motor;The utility model is through the scraping plate of two groups of connecting pipes staggered arrangement, combine the lamination structure of hinged seat, form dead corner scraping area, and the bio-based fiber containing moisture easily sticking wall is completely scraped back mixed system;Through the multilayer stirring system of "turning and stirring board broken dispersion-stirring pipe horizontal vortex-inclined stirring plate A axial circulation", form "axial through+radial cover" stirring effect, turning and stirring board first break fiber agglomeration, 30-45 ° inclination of inclined stirring plate promotes different density raw material up and down flow, completely solve stratification problem;Through double-layer independent circulation pipeline, the temperature and humidity of upper and lower layers of mixing cylinder can be respectively regulated and controlled, and hot medium is used for humid material to reduce humidity and prevent sticking.

Description

Technical Field

[0001] This utility model relates to the field of mixing technology, specifically to a bio-based fiber raw material composite mixing device. Background Technology

[0002] Bio-based fibers are a new type of material that has emerged in recent years. Their main raw materials are short fibers from crop straw, bamboo, and hemp, which are compounded with bio-based resins such as modified starch, soybean protein gum, and polylactic acid, and then manufactured through molding and injection molding. The products feature high strength, natural and rustic surface textures, vibrant colors, and a novel feel. They can replace some plastic, glass, ceramic, and porcelain products, and are biodegradable after disposal, making them a new type of environmentally friendly material.

[0003] In bio-based fiber mixing and processing equipment, existing technologies mostly use a single set of connecting pipes with scraper plates to scrape the inner wall of the mixing cylinder. The scraper plates and connecting pipes are mostly fixedly connected, and there is no hinged seat structure that can conform to the curvature of the cylinder wall.

[0004] Because only a single set of scraper blades is installed, and the scraper blades are fixed in position and lack a fitting and adjustment structure, a scraping blind zone is easily formed between the scraper blades and the inner wall of the mixing drum. For bio-based fibers that contain moisture and are prone to sticking to the wall, it is impossible to achieve complete scraping. A large amount of raw materials will adhere to the unscraped area of ​​the drum wall, which not only causes serious raw material loss, but also leads to a significant reduction in raw material utilization.

[0005] In view of this, we have launched a bio-based fiber raw material composite mixing equipment. Utility Model Content

[0006] The purpose of this invention is to provide a bio-based fiber raw material composite mixing device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a bio-based fiber raw material composite mixing device, comprising: a mixing cylinder, a sealed mounting frame, and a rotating shaft;

[0008] A sealing mounting bracket is installed on top of the mixing drum, a speed reducer is installed on top of the sealing mounting bracket, and a drive motor is connected to the top of the speed reducer.

[0009] The rotating shaft is connected to the output end of the reducer and extends into the mixing drum. A fixed sleeve is detachably connected to the surface of the rotating shaft, and a stirring tube is provided on the side of the fixed sleeve. The drive motor drives the rotating shaft, fixed sleeve, and stirring tube to rotate inside the mixing drum through the reducer. This part is the key link of power transmission and preliminary mixing. The rotating shaft transmits power from the reducer to the components inside the drum. The fixed sleeve enables the detachable connection between the stirring tube and the rotating shaft (for easy maintenance and replacement). The stirring tube rotates with the shaft to perform radial mixing of the middle layer of raw materials, laying the foundation for subsequent deep mixing and forming a complete link of "power input - transmission - preliminary mixing".

[0010] The bottom of the stirring tube is located inside the mixing drum and is equipped with a scraping mechanism. The scraping mechanism is driven by a connecting pipe to rotate the scraper, so that the scraper can scrape off the objects remaining on the inner wall of the mixing drum. This is the core structure to ensure the uniformity of mixing and the cleanliness of the drum wall. The scraping mechanism relies on the stirring tube for power, and the connecting pipe acts as a carrier to drive the scraper to rotate. It can effectively remove the sticky raw materials remaining on the drum wall, avoid material clumping and waste or affecting the mixing accuracy, and solve the problem of bio-based raw materials easily adhering to the drum wall.

[0011] Preferably, the scraping mechanism includes hinged seats connected at equal intervals on the surfaces of the connecting pipes. The connecting pipes are located at the bottom of the mixing pipe, and the scraper is connected to the inside of the hinged seats by bolts. The scraper contacts the inner wall of the mixing cylinder. The scraper plates on the surfaces of the two sets of connecting pipes are staggered, forming a complementary structure during scraping. This preferred solution refines the practical design of the scraping mechanism. The combination of the hinged seats and bolts enables convenient disassembly and assembly of the scraper (for wear and replacement). The close contact between the scraper and the cylinder wall ensures the cleaning effect, while the staggered complementary structure eliminates scraping dead corners, further improving the comprehensiveness of cylinder wall cleaning and the uniformity of mixing.

[0012] Preferably, the bottom of the rotating shaft is provided with a connecting sleeve, the bottom of the connecting sleeve is connected to a stirring shaft, the surface of the stirring shaft is fixedly connected to the connecting sleeve A, and the surface of the connecting sleeve A is connected with inclined stirring plates A at equal intervals; this is a special stirring component for the raw materials at the bottom of the cylinder. The connecting sleeve and the stirring shaft extend the power to the bottom of the cylinder. When the inclined stirring plates A rotate, they can stir the deposited heavy raw materials upward, effectively avoiding the bottom deposition problem of bio-based raw materials due to density differences, and realizing the cyclic mixing of the bottom and upper layers of raw materials.

[0013] Preferably, the surface of the rotating shaft is provided with a connecting sleeve B, and the surface of the connecting sleeve B is provided with stirring plates at equal intervals. This preferred structure is the key to deep mixing of the middle layer raw materials. The connecting sleeve B realizes the stable assembly of the stirring plates and the rotating shaft. When the arc-shaped stirring plates rotate, they can push and stir the middle layer raw materials laterally and tumble them up and down, breaking the agglomeration of the raw materials, promoting the cross-fusion of different components, and enhancing the mixing effect.

[0014] Preferably, the inner side of the connecting pipe is provided with an inclined stirring plate B for stirring; this preferred design realizes the "one structure, two functions" of the scraping mechanism. When the inclined stirring plate B rotates with the connecting pipe, it can stir the raw material at the bottom edge of the cylinder at an angle, and while scraping the material on the cylinder wall, it can enhance the fluidity of the material at the bottom, so that the scraping action and local stirring are carried out in synergy, and further improve the mixing efficiency.

[0015] Preferably, a connecting sleeve C is connected to the surface of the stirring shaft, and a connecting frame is connected to the surface of the connecting sleeve C, and the connecting frame is connected to the surface of the connecting pipe; this preferred structure is a rigid connecting hub of the bottom assembly. The connecting sleeve C and the connecting frame connect the stirring shaft and the connecting pipe into a whole, ensuring that the bottom stirring assembly and the scraping mechanism operate synchronously, avoiding stirring misalignment or scraping failure caused by relative displacement due to vibration, and improving the stability of equipment operation.

[0016] Preferably, the middle layer of the mixing cylinder is provided with a circulation pipe A. One end of the circulation pipe A is connected to an inlet pipe A, which penetrates the mixing cylinder. The other end of the circulation pipe A is connected to an outlet pipe A, which also penetrates the mixing cylinder. This is the upper layer temperature control unit inside the cylinder. The heating / cooling medium is introduced into the circulation pipe A through the inlet pipe A and discharged from the outlet pipe A after circulation. This can accurately adjust the temperature of the raw materials in the middle and upper layers, avoid denaturation and clumping of the bio-based raw materials due to local temperature incompatibility, and ensure the material stability during the mixing process.

[0017] Preferably, the middle layer of the mixing cylinder is provided with a circulation pipe B below the circulation pipe A. One end of the circulation pipe B is connected to an inlet pipe B, which passes through the mixing cylinder, and the other end of the circulation pipe B is connected to an outlet pipe B, which also passes through the mixing cylinder. This preferred solution constitutes a dual-layer independent temperature control system. The circulation pipe B is specifically used to regulate the temperature of the lower layer raw materials. In conjunction with the upper layer pipe A, it can realize differentiated temperature control between the upper and lower layers in the cylinder, which meets the "layered temperature control" requirement when mixing bio-based fiber raw materials and further improves the accuracy of temperature control.

[0018] Preferably, the bottom of the mixing cylinder is provided with a discharge port, which is also equipped with a valve; this is the output channel for the mixed material. The discharge port is located at the lowest point of the cylinder bottom. With the pushing action of the bottom stirring component, the material can be completely discharged, reducing residual waste. At the same time, it is convenient to connect with subsequent conveying equipment to ensure the continuity of the production process.

[0019] Preferably, the bottom of the mixing cylinder is connected with support rods at equal intervals; this is a stable support structure for the equipment, and the equally spaced support rods provide balanced support for the mixing cylinder, providing basic stability for the overall operation of the equipment.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] (1) By staggering the scraper blades of the two sets of connecting pipes and combining them with the fitting structure of the hinge seat, a scraping area without dead corners is formed, which thoroughly scrapes the bio-based fibers containing moisture that are easy to stick to the wall back into the mixing system, avoiding the loss caused by the raw materials sticking to the cylinder wall, and significantly improving the utilization rate of raw materials.

[0022] (2) Through the multi-layer mixing system of “tumbling plate crushing and dispersing - horizontal vortex of stirring tube - axial circulation of inclined stirring plate A”, a mixing effect of “axial penetration + radial coverage” is formed. The tumbling plate first breaks the fiber agglomeration, and the 30-45° inclination angle of the inclined stirring plate promotes the flow of raw materials of different densities, which completely solves the problem of layering caused by density difference of bio-based fibers. The mixing uniformity is significantly improved compared with traditional equipment.

[0023] (3) The temperature and humidity of the upper and lower layers of the mixing drum can be controlled separately through the double-layer independent circulation pipeline. Moist raw materials are cooled by a hot medium to prevent sticking, while dry raw materials are kept alive by a cold medium to prevent clumping. This adapts to the needs of each stage of raw material mixing, avoids mixing failure caused by environmental factors, and significantly improves mixing efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the drive motor, reducer, stirring shaft and scraping mechanism of this utility model;

[0025] Figure 2 This is a schematic diagram of the drive motor, reducer, connecting pipe and scraping mechanism of this utility model;

[0026] Figure 3 This is a schematic diagram of the overall structure of this utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the mixing cylinder, circulation pipe A and circulation pipe B of this utility model when they are connected in three dimensions;

[0028] Figure 5 This is a schematic diagram of the structure of this utility model in a tilted three-dimensional form;

[0029] Figure 6 This is a three-dimensional exploded view of the mixing cylinder, drive motor, reducer, stirring shaft, and scraping mechanism of this utility model.

[0030] In the diagram: 1. Drive motor; 2. Reducer; 3. Sealing mounting bracket; 4. Rotating shaft; 5. Stirring tube; 6. Fixed sleeve; 7. Connecting sleeve; 8. Stirring shaft; 9. Inclined stirring plate A; 10. Connecting sleeve A; 11. Tumbling plate; 12. Connecting sleeve B; 13. Connecting pipe; 14. Scraper; 15. Hinge seat; 16. Connecting frame; 17. Connecting sleeve C; 18. Inclined stirring plate B; 19. Mixing cylinder; 20. Inlet pipe A; 21. Outlet pipe A; 22. Inlet pipe B; 23. Outlet pipe B; 24. Discharge port; 25. Support rod; 26. Circulation pipe A; 27. Circulation pipe B. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved with", "connected", etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0033] Please see Figure 1-6 This utility model provides a technical solution: a bio-based fiber raw material composite mixing equipment, including: a mixing cylinder 19 and a sealed mounting frame 3. The core power of the bio-based fiber raw material composite mixing equipment comes from the drive motor 1, which is installed on the top of the sealed mounting frame 3. The high speed is converted into a torque output suitable for mixing through the reducer 2. The sealed mounting frame 3 not only provides stable support for the motor and reducer, but also seals the connection between the rotating shaft 4 and the mixing cylinder 19 to prevent raw material leakage or external impurities from entering during the mixing process, and ensures a clean mixing environment.

[0034] As a key component for power transmission, the rotating shaft 4 is connected to the output end of the reducer 2 at one end and extends into the mixing drum 19 at the other end. It can transmit power to each stage of the stirring components. The stirring tube 5 is installed on its surface through the detachable fixing sleeve 6. When the drive motor 1 is running, it drives the rotating shaft 4 to rotate after being reduced by the reducer 2. This causes the fixing sleeve 6 and the stirring tube 5 to rotate synchronously in the mixing drum 19. The stirring tube 5 can perform radial stirring of the middle layer of raw materials in the drum, initially breaking up the agglomeration of the raw materials.

[0035] The scraping mechanism at the bottom of the mixing tube 5 is an important component to ensure the uniformity of mixing. Its core is the connecting tube 13, which is connected to the mixing tube 5 and rotates synchronously with it. The connecting tube 13 has hinge seats 15 installed at equal intervals on its surface, and the scraper 14 is fixed by bolts. This detachable connection makes it easy to replace the scraper 14 according to the wear of the inner wall of the mixing cylinder 19.

[0036] The scraper 14 is made of wear-resistant elastic material and is in close contact with the inner wall of the mixing cylinder 19. During rotation, it can effectively scrape off the raw materials adhering to the inner wall, avoiding material residue and clumping that would affect the mixing quality. The scraper 14 on the surfaces of the two sets of connecting pipes 13 are staggered to form complementary scraping areas, ensuring that there are no dead corners in the cylinder wall. At the same time, the inclined stirring plate B18 inside the connecting pipe 13 can perform oblique stirring of the raw materials at the bottom when the connecting pipe 13 rotates, enhancing the fluidity of the bottom materials and improving the overall mixing effect in conjunction with the scraping action.

[0037] The bottom of the rotating shaft 4 is connected to the stirring shaft 8 via the connecting sleeve 7. Inclined stirring plates A9 are installed at equal intervals on the connecting sleeve A10 on the surface of the stirring shaft 8. The inclined design allows the raw materials at the bottom to be stirred upwards during rotation, preventing heavy raw materials from settling at the bottom of the mixing drum 19.

[0038] A stirring plate 11 is installed on the connecting sleeve B12 on the surface of the rotating shaft 4. The stirring plate 11 has an arc structure. When rotating, it can push and stir the middle layer raw materials horizontally and tumble them up and down, promoting cross-mixing between different raw materials.

[0039] The connecting sleeve C17 on the surface of the stirring shaft 8 is connected to the connecting pipe 13 through the connecting frame 16, so that the bottom stirring component and the scraping mechanism form a rigid whole, ensuring that the components operate synchronously and avoiding displacement caused by vibration that affects the stirring accuracy.

[0040] The circulation pipe A26 is located in the upper layer. Heating or cooling medium (such as hot water, cold water or heat transfer oil) is introduced through the liquid inlet pipe A20. After circulating through the pipe, it is discharged from the liquid outlet pipe A21. The temperature of the raw material in the upper layer of the mixing drum 19 can be adjusted.

[0041] The circulation pipe B27 is located in the lower layer. It achieves medium circulation through the inlet pipe B22 and the outlet pipe B23. It is specifically designed to regulate the temperature of the raw materials in the lower layer. The dual-layer pipes are independently controlled, which can accurately adjust the temperature of the upper and lower layers in the cylinder according to the characteristics of different raw materials. This avoids the denaturation of bio-based raw materials due to excessively high local temperatures, or the impact of excessively low temperatures on the flowability and mixing effect of the raw materials.

[0042] The support rods 25, which are installed at equal intervals at the bottom of the mixing cylinder 19, are made of high-strength alloy material. They not only provide stable support for the entire equipment, but also allow the mixing cylinder 19 to be kept horizontal by adjusting the height of the support rods, thus ensuring the uniformity of material mixing.

[0043] After mixing, the raw materials are discharged through outlet 24. A valve can be installed at outlet 24 to control the discharge speed, facilitating connection with subsequent processing equipment. Its location is designed at the lowest point of the mixing drum 19, and in conjunction with the pushing action of the bottom stirring component, it can completely discharge the material inside the drum, reducing residue and waste.

[0044] Specifically, during use, bio-based fiber raw materials (such as straw fiber, plant protein fiber, etc.) often experience problems such as uneven mixing and sticking to the walls due to moisture content, fiber bundle clumping, and density differences. This equipment achieves efficient mixing through an integrated design of "power drive - multi-layer stirring - wall scraping to prevent sticking - temperature and humidity control". The specific process is as follows:

[0045] After the drive motor 1 starts, the output speed is reduced and the torque is increased by the reducer 2, and the stable power is transmitted to the rotating shaft 4. The sealed mounting bracket 3 not only fixes the connection between the reducer 2 and the mixing cylinder 19, but also prevents the leakage of raw material dust or moisture during the mixing process. The rotating shaft 4 drives all the stirring parts on the surface and bottom to rotate synchronously, forming a three-dimensional stirring system of "axial penetration + radial coverage". Specifically, it includes the stirring tube 5 connected by the fixed sleeve 6, the stirring plate 11 connected by the connecting sleeve B12, the stirring shaft 8 connected by the connecting sleeve 7, and the secondary stirring structure extending from the stirring shaft 8.

[0046] The connecting sleeve B12 in the upper part of the rotating shaft 4 drives the stirring plate 11 to rotate at high speed, which initially breaks down the blocky bio-based fiber raw material fed into the mixing cylinder 19. The spacing of the stirring plate 11 is designed to match the fiber bundle size, breaking the agglomeration through shearing force, and at the same time throwing the raw material to the surroundings, laying a uniform foundation for the lower layer of mixing.

[0047] The stirring tube 5 rotates with the fixed sleeve 6, and the inclined stirring plate B18 on its inner side forms an oblique vortex, which makes the raw material flow rapidly in the horizontal direction. At the same time, the stirring shaft 8 drives the inclined stirring plate A9 to rotate through the connecting sleeve A10. The tilt angle (usually 30-45°) causes the raw material to circulate up and down along the stirring axis, solving the problem of stratification of raw materials with different densities. The connecting frame 16 fixes the stirring shaft 8 and the connecting tube 13 through the connecting sleeve C17 to ensure the coaxial stability of the middle and lower stirring components and avoid shaking that affects the mixing accuracy.

[0048] The inclined stirring plate A9 at the bottom of the stirring shaft 8 is close to the bottom of the mixing cylinder 19, which forcibly turns over the deposited heavy raw materials (such as bio-based fibers containing mineral additives) to prevent the raw materials at the bottom from accumulating and caking, and to ensure the overall mixing uniformity.

[0049] The connecting pipe 13 at the bottom of the stirring pipe 5 rotates synchronously with the stirring pipe. The scraper 14 on its surface is connected to the connecting pipe through the hinge seat 15. With the help of the bolt connection structure, the scraper is always in contact with the inner wall of the mixing cylinder 19. Because the bio-based fiber raw material contains moisture, it is easy to stick to the cylinder wall. The scraper 14 of the two sets of connecting pipes 13 are staggered to form a complementary scraping area without dead corners, which scrapes the sticky raw material back into the mixing system. The connecting frame 16 connects the stirring shaft 8 and the connecting pipe 13 to prevent the connecting pipe from shaking when the scraper 14 is under force, and ensures that the scraping force is uniform, which not only prevents the cylinder wall from being scratched, but also ensures the scraping effect.

[0050] The circulation pipes A26 (upper layer) and B27 (lower layer) in the middle layer of the mixing cylinder 19 form a three-dimensional temperature control network. For damp raw materials, hot water or steam can be introduced through the inlet pipes A20 and B22 to heat the raw materials in the cylinder and reduce humidity to reduce adhesion. For raw materials that are prone to drying and clumping, cold water can be introduced to regulate the temperature and maintain the activity of the raw materials. The circulation pipes A and B have independent inlet and outlet pipes (outlet pipes A21 and B23), which can regulate the temperature of the upper and lower layers respectively to meet the temperature and humidity requirements of different stages in the raw material mixing process and further improve the mixing uniformity.

[0051] After mixing, the raw materials are discharged through the discharge port 24 at the bottom of the mixing cylinder 19. The support rods 25 distributed at equal intervals at the bottom ensure the overall stability of the equipment and avoid the discharge accuracy being affected by vibration during the mixing process.

[0052] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bio-based fiber raw material composite mixing device, characterized in that, include: A mixing drum (19) and a sealing mounting bracket (3) are provided. The sealing mounting bracket (3) is installed on the top of the mixing drum (19). A speed reducer (2) is installed on the top of the sealing mounting bracket (3). A drive motor (1) is connected to the top of the speed reducer (2). A rotating shaft (4) is connected to the output end of a reducer (2) and extends into the mixing drum (19). A fixed sleeve (6) is detachably connected to the surface of the rotating shaft (4). A stirring tube (5) is provided on the side of the fixed sleeve (6). The drive motor (1) drives the rotating shaft (4), the fixed sleeve (6) and the stirring tube (5) to rotate inside the mixing drum (19) through the reducer (2). The bottom of the stirring tube (5) is located inside the mixing cylinder (19) and a scraping mechanism is provided. The scraping plate (14) is driven to rotate through the connecting pipe (13) of the scraping mechanism so that the scraping plate (14) scrapes off the objects remaining on the inner wall of the mixing cylinder (19).

2. The bio-based fiber raw material composite mixing equipment according to claim 1, characterized in that, The scraping mechanism includes hinge seats (15) that are equally spaced on the surface of the connecting pipe (13). The connecting pipe (13) is located at the bottom of the stirring pipe (5), and the scraper (14) is connected to the inside of the hinge seat (15) by bolts. The scraper (14) contacts the inner wall of the mixing cylinder (19). The scraper (14) on the surfaces of the two sets of connecting pipes (13) are staggered and complement each other when scraping.

3. The bio-based fiber raw material composite mixing equipment according to claim 1, characterized in that, The bottom of the rotating shaft (4) is provided with a connecting sleeve (7), the bottom of the connecting sleeve (7) is connected to a stirring shaft (8), the surface of the stirring shaft (8) is fixedly connected to a connecting sleeve A (10), and the surface of the connecting sleeve A (10) is connected with inclined stirring plates A (9) at equal intervals.

4. The bio-based fiber raw material composite mixing equipment according to claim 3, characterized in that, The surface of the rotating shaft (4) is provided with a connecting sleeve B (12), and the surface of the connecting sleeve B (12) is provided with stirring plates (11) at equal intervals.

5. The bio-based fiber raw material composite mixing equipment according to claim 3, characterized in that, The inner side of the connecting pipe (13) is provided with an inclined stirring plate B (18) for stirring.

6. The bio-based fiber raw material composite mixing equipment according to claim 3, characterized in that, The surface of the stirring shaft (8) is connected to a connecting sleeve C (17), the surface of the connecting sleeve C (17) is connected to a connecting frame (16), and the connecting frame (16) is connected to the surface of the connecting pipe (13).

7. The bio-based fiber raw material composite mixing equipment according to claim 1, characterized in that, The middle layer of the mixing cylinder (19) is provided with a circulation pipe A (26). One end of the circulation pipe A (26) is connected to an inlet pipe A (20), which penetrates the mixing cylinder (19). The other end of the circulation pipe A (26) is connected to an outlet pipe A (21), which also penetrates the mixing cylinder (19).

8. The bio-based fiber raw material composite mixing equipment according to claim 1, characterized in that, The middle layer of the mixing cylinder (19) is provided with a circulation pipe B (27) below the circulation pipe A (26). One end of the circulation pipe B (27) is connected to an inlet pipe B (22), which penetrates the mixing cylinder (19). The other end of the circulation pipe B (27) is connected to an outlet pipe B (23), which penetrates the mixing cylinder (19).

9. The bio-based fiber raw material composite mixing equipment according to claim 1, characterized in that, The bottom of the mixing cylinder (19) is provided with a discharge port (24).

10. The bio-based fiber raw material composite mixing equipment according to claim 1, characterized in that, The bottom of the mixing cylinder (19) is connected with support rods (25) at equal intervals.

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