Biomass solid-liquid blending and mixing device

Abstract

The utility model relates to the field of biomass fertilizer preparation, especially a kind of biomass solid-liquid deployment mixed stirring device, it includes: rack, for providing bearing;Frame, rotatably be located on rack by first rotating mechanism;Stirring barrel, rotatably be installed on frame along the axial direction by second rotating mechanism, and the rotation axis of stirring barrel and the rotation axis of frame are perpendicular to each other, stirring barrel inside is equipped with the mixing chamber for accommodating biomass material and liquid fertilizer, multiple free rolling hard spheres are provided in mixing chamber.This biomass solid-liquid deployment stirring device provided by the utility model utilizes the soft fluffy characteristics of biomass material, through using hard sphere to carry out gap intermittent circulation extrusion to biomass material, constantly destroy the fiber structure of biomass material, so that biomass material better absorbs liquid fertilizer mixed therein.Finally realize the sufficient mixing of biomass material and liquid fertilizer.

Description

Technical Field

[0001] This utility model relates to the field of biomass fertilizer preparation, and in particular to a biomass solid-liquid blending and mixing device. Background Technology

[0002] With the popularization of the concept of sustainable agricultural development, the resource utilization of straw has become an important issue. Converting straw into bio-fertilizer through microbial fermentation technology can not only reduce environmental pollution caused by burning but also improve soil structure and increase organic matter content. The application of this green technology aligns with the principles of a circular economy, solving the problem of straw disposal and providing a green fertilizer option for agricultural production, resulting in significant environmental and economic benefits.

[0003] Currently, conventional composting of straw alone takes a long time. Therefore, mixing straw with existing organic microbial liquid fertilizer can effectively improve the fermentation efficiency of straw. However, the following problems still exist: First, the straw, or rather these biomass materials, need to be crushed before mixing to increase the contact area. During the subsequent mixing process with the liquid microbial fertilizer, due to the soft and fluffy nature of the biomass materials, conventional mixers are insufficient to fully mix the liquid fertilizer and biomass materials. Utility Model Content

[0004] (a) Technical problems to be solved This invention provides a biomass solid-liquid mixing and stirring device, which aims to utilize the soft and fluffy characteristics of biomass materials to fully mix biomass materials with liquid fertilizer by simultaneously implementing intermittent alternating extrusion and stirring.

[0005] (II) Technical Solution To achieve the above objectives, this utility model proposes a biomass solid-liquid mixing and stirring device, comprising: frame; The frame is rotatably mounted on the machine frame via a first rotating mechanism; The mixing tank is rotatably mounted on the frame along the axial direction by a second rotating mechanism, and the rotation axis of the mixing tank is perpendicular to the rotation axis of the frame. The mixing tank has a mixing chamber for containing biomass materials and liquid fertilizer, and multiple free-rolling hard spheres are arranged in the mixing chamber.

[0006] A further technical solution is that the first rotating mechanism includes a reducer fixed to the frame and a first drive motor connected to the reducer; The speed reducer is a worm gear drive; The frame is mounted on the top of the machine frame via bearing supports, and one end is connected to the reducer via a rotating shaft, while the other end is connected to the machine frame via a locking assembly. The locking assembly is used to continuously adjust the angle between the rotation axis of the mixing tank and the horizontal plane.

[0007] A further technical solution is that the locking component includes a fixing plate and a pin; The fixing plate is fixedly installed on the top of the frame, and has a first fixing hole in a circle centered on the rotation axis of the frame. The frame has a corresponding second fixing hole, and the first fixing hole and the second fixing hole are connected by inserting the pin.

[0008] A further technical solution is that the second rotating mechanism includes a toothed ring surrounding the middle of the mixing tank, and a second drive motor fixedly mounted on the frame; Along the axial direction of the mixing tank, both ends of the mixing tank are mounted on the frame via rotary bearings. The output end of the second drive motor is connected to a transmission gear, and the transmission gear and the gear ring form a meshing transmission connection.

[0009] A further technical solution is that the hard sphere is a ceramic sphere, and the number of the ceramic spheres is 15%-30% of the total volume of the mixing tank.

[0010] A further technical solution is that the inner wall of the mixing tank is provided with a plurality of annular guide ridges distributed axially, the cross section of the annular guide ridges is triangular, and the spacing between adjacent annular guide ridges is 1.2-1.5 times the diameter of the hard sphere.

[0011] A further technical solution is that the side wall of the mixing tank has a material outlet, and the material outlet is provided with a removable sealing cover, the sealing cover being embedded with a corrosion-resistant rubber sealing ring.

[0012] A further technical solution includes a control system; The control system is electrically connected to the first drive motor and the second drive motor.

[0013] A further technical solution is that the mixing tank is made of stainless steel and the inner wall is coated with a wear-resistant ceramic coating.

[0014] (III) Beneficial Effects In this invention, the frame is rotatably mounted on the machine stand, and a rotating mixing drum is housed inside the frame. This ensures that while the mixing drum rotates around its own axis, it can also swing or rotate synchronously along the fixed axis of the machine stand, driven by the frame. This achieves a combined motion mode of axial rotation of the mixing drum and revolution with the frame. When the mixing drum rotates around its own axis, the internal hard spheres collide dynamically under centrifugal force, further refining and breaking down large pieces of biomass material. When the mixing drum swings with the frame, because the density of the hard spheres is much greater than that of the biomass material, the hard spheres intermittently and alternately compress the biomass material, continuously breaking down its fibrous structure, thus improving its ability to absorb water and, consequently, better absorb the liquid fertilizer mixed within it. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure of a stirring device for solid-liquid mixing of biomass; Figure 2 This is a schematic diagram of the mixing tank. Figure 3 This is a schematic diagram of the internal cross-section of the mixing tank.

[0016] [Explanation of Labels in the Attached Image] 1: Frame; 2: Frame; 21: Second fixing hole; 3: Mixing tank; 31: Annular guide ridge; 32: Material outlet; 4: First rotating mechanism; 41: Reducer; 42: First drive motor; 5: Second rotating mechanism; 51: Gear ring; 52: Second drive motor; 53: Transmission gear; 6: Hard sphere; 7: Locking assembly; 71: Fixing plate; 711: First fixing hole; 72: Pin; 8: Sealing cover. Detailed Implementation

[0017] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] This embodiment provides a biomass solid-liquid mixing and stirring device, such as... Figures 1-3 As shown, it includes: a frame 1; a frame 2, rotatably mounted on the frame 1 via a first rotating mechanism 4; and a mixing tank 3, rotatably mounted on the frame 2 along the axial direction via a second rotating mechanism 5, with the rotation axis of the mixing tank 3 perpendicular to the rotation axis of the frame 2. The mixing tank 3 has a mixing chamber inside for containing biomass materials and liquid fertilizer, and multiple freely rolling hard spheres 6 are arranged inside the mixing chamber.

[0019] Specifically, the frame 1, used to support the equipment, is made of metal, preferably steel or aluminum alloy. Furthermore, for ease of installation and material unloading, the frame 1 is designed as an upward-opening U-shaped structure, wider at the bottom than the top, providing good structural stability. The frame 2, needing to rotate, is made of high-strength, lightweight aluminum alloy. Both ends of the frame 2 are connected to bearings located at the top of the frame 1, forming a rotatable connection. In this embodiment, the frame 2 is rectangular, but it can also be other forms, such as elliptical or circular. The axial ends of the mixing tank 3 are also connected to bearing seats located on both sides of the frame 2, forming a rotatable connection. The free rolling of the hard spheres 6 prevents fibrous materials from tangling and promotes biomass surface activation through collision and friction, making it easier for the biomass material to absorb the liquid fertilizer solution. The rotation axis of the mixing tank 3 is perpendicular to the rotation axis of the frame 2, ensuring thorough mixing without dead zones, while the bidirectional motion allows for uniform dispersion of the viscous liquid fertilizer, ultimately resulting in a highly stable and homogeneous mixed slurry.

[0020] In the above scheme, the collision effect generated by the free rolling of the rigid spheres 6 in three-dimensional space not only effectively prevents the entanglement and clumping of biomass fibers, but also significantly improves the absorption efficiency of the material for liquid fertilizer through mechanical activation. Specifically, during the rotation of the mixing tank 3, the rigid spheres 6 roll and collide freely under the action of centrifugal force and gravity, forming a high-intensity impact field. This dynamic collision can effectively break up the fiber bundles in the biomass and disperse the sticky clumps of liquid fertilizer. The continuous friction between the rigid spheres 6 and the biomass material damages the hydrophobic cuticle layer on the surface of the biomass, exposing the internal active groups. This significantly improves the adsorption capacity and penetration efficiency of the biomass for liquid fertilizer. In addition, the physical scraping effect formed when the rigid spheres 6 roll along the tank wall continuously removes the viscous material adhering to the inner wall and the annular guide ridge 31. This avoids the reduction in mixing efficiency caused by material accumulation. At the same time, the structural cooperation between the U-shaped frame 1 and the lightweight frame 2 ensures the stability of the equipment and provides convenience for material loading and unloading.

[0021] In this embodiment, the first rotating mechanism 4 includes a reducer 41 fixed to the frame 1 and a first drive motor 42 connected to the reducer 41. The reducer 41 is a worm gear drive. The frame 2 is mounted on the top of the frame 1 via bearing supports, with one end connected to the reducer 41 via a rotating shaft, and the other end connected to the frame 1 via a locking assembly 7. The locking assembly 7 is used to continuously adjust the angle between the rotation axis of the mixing tank 3 and the horizontal plane. Specifically, the worm gear reducer 41 converts the high-speed rotation of the first drive motor 42 into a large torque oscillation, ensuring that the frame 2 can still rotate smoothly under load conditions; at the same time, its self-locking characteristic can prevent the frame 2 from accidentally deflecting when the machine stops. The locking assembly 7 allows the operator to quickly fix the axis of the mixing tank 3 at any angle. The overall structure is simple and easy to install and maintain.

[0022] It should be noted that the reducer 41 is connected to the frame 1 by a mounting plate made of sheet metal, specifically by bolts.

[0023] Furthermore, the locking assembly 7 includes a fixing plate 71 and a pin 72. Specifically, the fixing plate 71 is fixedly installed on the top of the frame 1, and has a ring of first fixing holes 711 centered on the rotation axis of the frame 2. The frame 2 has corresponding second fixing holes 21, and the first fixing holes 711 and the second fixing holes 21 are connected by inserting the pin 72. The locking assembly 7, through the cooperation of the fixing plate 71 and the pin 72, achieves reliable and convenient angle adjustment of the frame 2. The annular array of first fixing holes 711 on the fixing plate 71 and the second fixing holes 21 on the frame 2 constitute a multi-point positioning system, enabling the mixing tank 3 to be quickly locked at any working angle. The rigid connection of the pin 72 avoids the creep problem that may exist in hydraulic or pneumatic locking mechanisms, ensuring that the position of the frame 2 is absolutely fixed during the mixing process. This mechanical locking structure not only has anti-impact and vibration characteristics, but its modular design also facilitates maintenance and replacement.

[0024] In this embodiment, the second rotating mechanism 5 includes a gear ring 51 surrounding the middle of the mixing tank 3, and a second drive motor 52 fixedly mounted on the frame 2. Along the axial direction of the mixing tank 3, both ends of the mixing tank 3 are mounted on the frame 2 via rotary bearings. The output end of the second drive motor 52 is connected to a transmission gear 53, and the transmission gear 53 and the gear ring 51 form a meshing transmission connection. It should be noted that a mounting base can be provided between the second drive motor 52 and the frame 2, and the second drive motor 52 is mounted to the mounting base by bolts. The specific installation process of the gear ring 51 is as follows: First, a large-diameter bushing is installed in the middle of the mixing tank 3 and welded in place. Then, the gear ring 51 is fixedly connected to the side of the bushing using surrounding bolts.

[0025] The second rotating mechanism 5 achieves precise control of the rotation of the mixing tank 3 through the meshing transmission of the gear ring 51 and the transmission gear 53. Since the gear ring 51 is located in the middle of the mixing tank 3, the corresponding transmission gear 53 and the second drive motor 52 are also located on the rotation axis of the frame 2, further supported by the double-end bearings. This structure better balances the axial load during the rotation of the mixing tank 3 driven by the frame 2, effectively reducing impact vibration during operation and extending the overall lifespan of the equipment. The feature of fixing the drive motor to the frame 2 eliminates the need to consider wiring entanglement when adjusting the tilt angle of the mixing tank 3. The overall structure ensures both reliable power transmission and a compact equipment layout.

[0026] In this embodiment, the hard spheres 6 are ceramic spheres, and the number of ceramic spheres is 15%-30% of the total volume of the mixing tank 3. Specifically, the purpose of choosing ceramic for the hard spheres 6 is to utilize their acid and alkali resistance and corrosion resistance properties, as the liquid fertilizer contains acidic or alkaline substances. The number of ceramic spheres is 15%-30% of the total volume of the mixing tank 3. This filling ratio range ensures that a sufficient shear force field is formed between the hard spheres 6, promoting the dispersion of materials at the microscale, while avoiding the decrease in fluidity caused by overfilling.

[0027] In this embodiment, the inner wall of the mixing tank 3 is provided with multiple axially distributed annular guide ridges 31. The cross-section of the annular guide ridges 31 is triangular, and the spacing between adjacent annular guide ridges 31 is 1.2-1.5 times the diameter of the rigid spheres 6. Specifically, the periodic vortices generated by the annular guide ridges 31 during rotation can prevent material from sticking to the wall, while promoting the contact frequency between the rigid spheres 6 and the biomass mixture. The spacing of 1.2-1.5 times can effectively avoid the risk of the rigid spheres 6 getting stuck.

[0028] In this embodiment, the mixing tank 3 has a material inlet 32 ​​on its side wall, and a removable sealing cover 8 is provided at the material inlet 32. The sealing cover 8 has a corrosion-resistant rubber sealing ring embedded inside. Specifically, the material inlet 32 ​​is used for loading and unloading biomass materials, liquid fertilizer, and mixtures of the two. The function of the sealing cover 8 is to ensure that the mixing tank 3 does not leak liquid during rotation. In addition, a safety pressure relief valve can be provided on the mixing tank 3 to release the gas generated by the internal biochemical reaction in a timely manner, ensuring the safe operation of the equipment.

[0029] In addition, this embodiment also includes a control system. The control system is electrically connected to the first drive motor 42 and the second drive motor 52. The frame 2 and the mixing tank 3 are started and stopped manually via buttons on the control system. The mixing tank 3 is made of stainless steel and its inner wall is coated with a wear-resistant ceramic coating.

[0030] The specific working principle of the stirring device for biomass solid-liquid mixing in this embodiment is as follows: The operator first opens the sealing cover 8 on the side wall of the mixing tank 3, adds biomass materials and liquid fertilizer into the mixing chamber according to the ratio, and then seals it. The control system is activated; the first drive motor 42 drives the frame 2 to swing to a certain angle via a worm gear, and the angle of the frame 2 is manually locked using the pin 72 of the locking component 7. Simultaneously, the second drive motor 52 drives the mixing tank 3 to rotate continuously around its own axis via the gear ring 51. Ceramic balls collide at high speed between the annular guide ridges 31, continuously breaking down biomass fibers and evenly dispersing the viscous liquid fertilizer. During the mixing process, the safety valve automatically releases gas. After a period of time, the pin 72 is released, and the operator manually controls the first drive motor 42 to drive the frame 2 to swing to another angle via the worm gear, continuing to use the pin 72 for fixation. During this process, the second drive motor 52 operates continuously. This operation is repeated multiple times until the material reaches a homogeneous state, at which point the machine is stopped. Finally, the frame 2 is released from its locking position, the mixing tank 3 is tilted to the discharge angle, and the sealing cover 8 is opened to discharge the high-quality mixture.

[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indicator will also change accordingly.

[0032] Furthermore, in this embodiment, the use of terms such as "first" and "second" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this embodiment, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this embodiment, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this embodiment according to the specific circumstances.

[0034] It should be understood that the above description of the specific embodiments of this utility model is only for illustrating the technical route and features of this utility model, and its purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. However, this utility model is not limited to the specific embodiments described above. All changes or modifications made within the scope of the claims of this utility model should be covered by the protection scope of this utility model.

Claims

1. A biomass solid-liquid blending and mixing device, characterized in that, include: Rack (1); The frame (2) is rotatably mounted on the frame (1) via the first rotating mechanism (4); The mixing tank (3) is rotatably mounted on the frame (2) along the axial direction by the second rotating mechanism (5), and the rotation axis of the mixing tank (3) is perpendicular to the rotation axis of the frame (2). The mixing tank (3) is provided with a mixing chamber for containing biomass materials and liquid fertilizer. Multiple free-rolling hard spheres (6) are provided in the mixing chamber.

2. The biomass solid-liquid blending and mixing apparatus according to claim 1, wherein The first rotating mechanism (4) includes a reducer (41) fixed to the frame and a first drive motor (42) connected to the reducer (41). The reducer (41) is a worm gear drive; The frame (2) is mounted on the top of the frame (1) via a bearing support, and one end is connected to the reducer (41) via a rotating shaft, while the other end is connected to the frame (1) via a locking assembly (7). The locking assembly (7) is used to continuously adjust the angle between the rotation axis of the mixing tank (3) and the horizontal plane.

3. The biomass solid-liquid blending and mixing device according to claim 2, wherein, The locking assembly (7) includes a fixing plate (71) and a pin (72); The fixing plate (71) is fixedly installed on the top of the frame (1), and has a first fixing hole (711) around the rotation axis of the frame (2). The frame (2) has a corresponding second fixing hole (21). The first fixing hole (711) and the second fixing hole (21) are connected by inserting the pin (72).

4. The biomass solid-liquid blending and mixing apparatus according to claim 3, wherein The second rotating mechanism (5) includes a toothed ring (51) surrounding the middle of the mixing tank (3) and a second drive motor (52) fixedly mounted on the frame (2). Along the axial direction of the mixing tank (3), both ends of the mixing tank (3) are mounted on the frame (2) by rotating bearings. The output end of the second drive motor (52) is connected to a transmission gear (53), and the transmission gear (53) and the gear ring (51) form a meshing transmission connection.

5. The biomass solid-liquid blending and mixing apparatus according to claim 1, wherein The hard sphere (6) is a ceramic sphere, and the number of the ceramic spheres is 15%-30% of the total volume of the mixing tank (3).

6. The biomass solid-liquid blending and mixing apparatus according to claim 1, wherein The inner wall of the mixing tank (3) is provided with a plurality of axially distributed annular guide ridges (31). The cross-section of the annular guide ridges (31) is triangular, and the spacing between adjacent annular guide ridges (31) is 1.2-1.5 times the diameter of the hard sphere (6).

7. The biomass solid-liquid blending and mixing apparatus according to claim 1, wherein The mixing tank (3) has a material inlet (32) on its side wall. A removable sealing cover (8) is provided at the material inlet (32). A corrosion-resistant rubber sealing ring is embedded in the sealing cover (8).

8. The biomass solid-liquid blending and mixing apparatus according to claim 4, wherein It also includes the control system; The control system is electrically connected to the first drive motor (42) and the second drive motor (52).

9. The biomass solid-liquid blending and mixing apparatus according to claim 1, wherein The mixing tank (3) is made of stainless steel and its inner wall is coated with a wear-resistant ceramic coating.

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