A biomass pyrolysis pretreatment device
By introducing a vibration component and a quick-disassembly screen plate design into the biomass pyrolysis pretreatment equipment, the problems of long fiber leakage and jamming have been solved, achieving efficient screening and easy screen plate replacement, thus improving the stability and economy of the pyrolysis process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Filing Date
- 2025-08-11
- Publication Date
- 2026-07-17
Smart Images
Figure CN224513436U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of biomass pyrolysis pretreatment technology, specifically to a biomass pyrolysis pretreatment device. Background Technology
[0002] Biomass pyrolysis pretreatment equipment refers to specialized equipment used to physically, chemically, or physicochemically treat biomass before it undergoes pyrolysis. This treatment aims to improve biomass characteristics such as particle size, moisture content, impurity content, and structural morphology, thereby enhancing subsequent pyrolysis efficiency and optimizing product quality. It is a crucial pre-processing unit in biomass pyrolysis conversion systems, such as those producing biochar, bio-oil, and syngas, directly impacting the economy and stability of the entire pyrolysis process. Biomass in its raw state, such as straw, sawdust, livestock manure, and agricultural and forestry waste, often exhibits problems such as uneven particle size, high moisture content, impurities like soil and metals, and a dense structure, such as the difficult-to-decompose fibrous structure of lignocellulosic biomass. These issues can lead to uneven heating, excessive energy consumption, and low product purity during pyrolysis. The core function of pretreatment equipment is to address these problems through treatment.
[0003] Currently, screening devices are one of the key pieces of equipment in the pretreatment stage before biomass pyrolysis. However, their actual use has obvious limitations: On the one hand, biomass pellets often contain long, shaped fibers with special forms, such as straw fragments. These fibers are prone to leakage or jamming during traditional screening processes, causing qualified pre-treated pellets to be screened out along with the long, shaped fibers, which seriously affects the screening purity and thus interferes with the stability of the subsequent pyrolysis process. On the other hand, due to significant batch differences in biomass raw materials, such as processing sawdust in the morning and switching to corn stalks in the afternoon, different raw materials have different requirements for the aperture and material of the screen plate. However, traditional screen plates are mostly fixed with multiple screws, making the disassembly process cumbersome. This not only prolongs the downtime during material switching but also significantly reduces the efficiency of screen plate replacement. Utility Model Content
[0004] The purpose of this invention is to provide a biomass pyrolysis pretreatment device to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a biomass pyrolysis pretreatment device, comprising a treatment shell, and further comprising: A feeding shell is fixed to the top of the processing shell. A vibration assembly is fixedly connected to one side of the processing shell. The vibration assembly includes a motor. The output end of the motor passes through the interior of the processing shell and is fixedly connected to a transmission rod. Elliptical wheels are fixedly connected to both sides of the surface of the transmission rod. A screening frame is provided inside the processing shell. A screening plate is inserted into the screening frame. One side of the screening plate is fixedly connected to a positioning component for quick disassembly of the screening plate. Two support frames are fixedly connected to one side of the top of the screening plate, and a comb plate is provided between the opposite sides of the two support frames.
[0006] Preferably, the comb plate is designed at an angle, and a pull plate is fixedly connected to one side of the top of the comb plate.
[0007] Preferably, both sides of the comb plate are fixedly connected with insert blocks, and the support frame has slots inside for use with the insert blocks.
[0008] Preferably, the positioning component includes an extension frame and a first spring. The extension frame is fixed to both sides of the top of the screening frame, the first spring is fixed to the top of the inner cavity of the extension frame, a movable plate is fixedly connected to the bottom of the first spring, an insertion rod that inserts into the screening plate is fixedly connected to the bottom of the movable plate, and a pull rod that slides inside the extension frame is fixedly connected to the top of the movable plate.
[0009] Preferably, a discharge plate is fixedly connected to one side of the screening frame, and a discharge shell is fixedly connected to the bottom of the screening frame.
[0010] Preferably, a positioning frame is fixedly connected to the bottom of the screening frame, a fixing rod is slidably connected inside the positioning frame, a connecting shell is fixedly connected to the bottom of the fixing rod, an auxiliary roller is rotatably connected inside the connecting shell, a second spring is fixedly connected between the top of the connecting shell and the positioning frame, and a limit ring is fixedly connected to the top of the fixing rod.
[0011] Preferably, both sides of the bottom of the screening frame are fixedly connected to a fixing plate, and the fixing plate is slidably connected to a support rod that is fixed to the inner wall of the processing shell.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention firstly uses a support frame and a comb plate set on one side of the top of the screening frame to block long impurities in the straw, while particles will be discharged along the comb plate to the top of the screening plate for screening, thus achieving the effect of screening long impurities, so as to facilitate subsequent centralized removal and cleaning. Through the positioning component and the insertion rod, the screening plate can be quickly disassembled and assembled, improving the convenience of replacing the screening plate. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the main structure of a biomass pyrolysis pretreatment device according to the present invention; Figure 2 This is a schematic diagram of the structure of this utility model from another perspective; Figure 3 This is a schematic cross-sectional view of the processing shell structure of this utility model; Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a schematic diagram of the positioning component of this utility model.
[0014] In the diagram: 1. Processing shell; 2. Feeding shell; 3. Vibration assembly; 301. Motor; 302. Transmission rod; 303. Elliptical wheel; 4. Screening frame; 5. Screening plate; 6. Support rod; 7. Positioning component; 701. Extension frame; 702. First spring; 703. Movable plate; 704. Insert rod; 705. Pull rod; 8. Support frame; 9. Comb plate; 10. Pull plate; 11. Insert block; 12. Slot; 13. Discharge plate; 14. Discharge shell; 15. Positioning frame; 16. Fixing rod; 17. Connecting shell; 18. Auxiliary roller; 19. Second spring; 20. Limiting ring; 21. Fixing plate. Detailed Implementation
[0015] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.
[0016] Please see Figure 1-5 As shown, a biomass pyrolysis pretreatment device includes a treatment shell 1, and further includes: A feeding shell 2 is fixed to the top of the processing shell 1. A vibration component 3 is fixedly connected to one side of the processing shell 1. The vibration component 3 includes a motor 301. The output end of the motor 301 extends into the interior of the processing shell 1 and is fixedly connected to a transmission rod 302. Elliptical wheels 303 are fixedly connected to both sides of the surface of the transmission rod 302. A screening frame 4 is provided inside the processing shell 1. A screening plate 5 is inserted into the screening frame 4. A positioning piece 7 for quick disassembly of the screening plate 5 is fixedly connected to one side of the screening plate 5. Two support frames 8 are fixedly connected to one side of the top of the screening plate 5. A comb plate 9 is set between the opposite sides of the two support frames 8. The processing shell 1 facilitates the limiting and screening of the granular items to be processed. The vibration assembly 3 is used to turn the motor 301 to rotate the transmission rod 302, which can rotate the elliptical wheel 303, thereby assisting in the vibration of the screening frame 4. The screening plate 5 is inserted into the screening frame 4 and can be quickly disassembled and assembled with the positioning piece 7. The support frame 8 facilitates the limiting installation of the comb plate 9, and the comb plate 9 can limit the straw segments in the pre-processed granules, reducing the possibility of clogging the screening plate 5.
[0017] The comb plate 9 is designed at an angle. A pull plate 10 is fixedly connected to one side of the top of the comb plate 9. Insert blocks 11 are fixedly connected to both sides of the comb plate 9. The support frame 8 has a slot 12 inside that is used to cooperate with the insert blocks 11. The comb plate 9 is designed at an angle to facilitate the flow of particles. The pull plate 10 is set to facilitate the disassembly of the comb plate 9. The insert blocks 11 and slots 12 can limit the comb plate 9 to be installed between the two support frames 8.
[0018] The positioning component 7 includes an extension frame 701 and a first spring 702. The extension frame 701 is fixed to both sides of the top of the screening frame 4, and the first spring 702 is fixed to the top of the inner cavity of the extension frame 701. A movable plate 703 is fixedly connected to the bottom of the first spring 702. A plug rod 704 that inserts into the screening plate 5 is fixedly connected to the bottom of the movable plate 703. A pull rod 705 that slides inside the extension frame 701 is fixedly connected to the top of the movable plate 703. When the user needs to disassemble the screening plate 5 for maintenance, he pulls the pull rod 705. As the pull rod 705 moves, it will drive the movable plate 703 to rise. When the movable plate 703 moves, it will drive the plug rod 704 to move and disengage from the interior of the screening plate 5. Then the screening plate 5 can be pulled out and replaced with a screening plate 5 with a different aperture size, so as to facilitate replacement according to the needs of different raw materials.
[0019] A discharge plate 13 is fixedly connected to one side of the screening frame 4, a discharge shell 14 is fixedly connected to the bottom of the screening frame 4, a positioning frame 15 is fixedly connected to the bottom of the screening frame 4, a fixing rod 16 is slidably connected inside the positioning frame 15, a connecting shell 17 is fixedly connected to the bottom of the fixing rod 16, an auxiliary roller 18 is rotatably connected inside the connecting shell 17, a second spring 19 is fixedly connected between the top of the connecting shell 17 and the positioning frame 15, a limit ring 20 is fixedly connected to the top of the fixing rod 16, and fixing plates 21 are fixedly connected to both sides of the bottom of the screening frame 4. A support rod 6 fixed to the inner wall of the processing shell 1 is slidably connected inside the fixing plate 21. The discharge plate 13 allows unscreened material to extend and discharge from the screening frame 4, preventing conflict with the discharge shell 14, while the discharge shell 14 facilitates the discharge of screened material. The material is discharged centrally. The positioning frame 15, fixing rod 16, connecting shell 17, auxiliary roller 18, second spring 19 and limiting ring 20 are set up so that when it is necessary to vibrate the screening frame 4 and screening plate 5, the motor 301 is turned on to make the transmission rod 302 drive the elliptical wheel 303 to rotate. At this time, the elliptical wheel 303 will press against the auxiliary roller 18. The pressure generated by the auxiliary roller 18 will compress the second spring 19 and make the positioning frame 15 drive the screening frame 4 to move upward. At this time, the fixing rod 16 will also slide within the positioning frame 15 to limit the movement, thereby achieving the effect of vibrating the screening frame 4. It should be noted that there is sufficient space between the limiting ring 20 and the discharge shell 14 to prevent collision. Through the sliding connection between the fixing plate 21 and the support rod 6, the bottom sides of the screening frame 4 can be limited and protected.
[0020] Working principle: First, the crushed biomass pellets are poured in through the feed shell 2. The material falls onto the top of the comb plate 9, while blocky and granular materials such as sawdust and rice husks leak through the gaps in the comb plate 9 to the lower layer. The pellets flow to the top of the screening plate 5. Then, when vibration screening of pellet size is required, the motor 301 is turned on to drive the transmission rod 302 to rotate the elliptical wheel 303. At this time, the elliptical wheel 303 presses against the auxiliary roller 18. The pressure generated by the auxiliary roller 18 compresses the second spring 19 and causes the positioning frame 15 to move the screening frame 4 upward. At this time, the fixing rod 16 also slides within the positioning frame 15, thereby achieving the vibration effect on the screening frame 4. Smaller particles will fall through the screening plate 5 into the discharge shell 14 and be discharged, while larger particles will be discharged through the discharge plate 13. When the user needs to disassemble the screening plate 5 for maintenance, pull the lever 705. As the lever 705 moves, it will cause the movable plate 703 to rise. When the movable plate 703 moves, it will cause the insertion rod 704 to move and disengage from the interior of the screening plate 5. Then the screening plate 5 can be pulled out and replaced with a screening plate 5 of different aperture size, so as to replace it according to the needs of different raw materials. The comb plate 9 can also be equipped with a pull plate 10 to drive the insertion block 11 out of the interior of the slot 12, thereby achieving quick disassembly and cleaning the long strips of impurities stuck on the comb plate 9.
[0021] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.
Claims
1. A biomass pyrolysis pre-treatment apparatus comprising a treatment shell (1), characterised in that, Also includes: A feed shell (2) is fixed to the top of the processing shell (1). A vibration assembly (3) is fixedly connected to one side of the processing shell (1). The vibration assembly (3) includes a motor (301). The output end of the motor (301) extends into the interior of the processing shell (1) and is fixedly connected to a transmission rod (302). Elliptical wheels (303) are fixedly connected to both sides of the surface of the transmission rod (302). A screening frame (4) is provided inside the processing shell (1). A screening plate (5) is inserted into the screening frame (4). A positioning piece (7) for quick disassembly of the screening plate (5) is fixedly connected to one side of the screening plate (5). Two support frames (8) are fixedly connected to one side of the top of the screening plate (5). A comb plate (9) is provided between the opposite sides of the two support frames (8).
2. The biomass pyrolysis pre-treatment apparatus according to claim 1, wherein: The comb plate (9) is designed at an angle, and a pull plate (10) is fixedly connected to one side of the top of the comb plate (9).
3. The apparatus for biomass pyrolysis pretreatment according to claim 1, wherein: Both sides of the comb plate (9) are fixedly connected with inserts (11), and the support frame (8) has slots (12) for use with the inserts (11).
4. The apparatus for biomass pyrolysis pretreatment according to claim 1, wherein: The positioning component (7) includes an extension frame (701) and a first spring (702). The extension frame (701) is fixed to both sides of the top of the screening frame (4). The first spring (702) is fixed to the top of the inner cavity of the extension frame (701). A movable plate (703) is fixedly connected to the bottom of the first spring (702). A plug rod (704) that is inserted into the screening plate (5) is fixedly connected to the bottom of the movable plate (703). A pull rod (705) that slides inside the extension frame (701) is fixedly connected to the top of the movable plate (703).
5. The apparatus for biomass pyrolysis pretreatment according to claim 1, wherein: A discharge plate (13) is fixedly connected to one side of the screening frame (4), and a discharge shell (14) is fixedly connected to the bottom of the screening frame (4).
6. The apparatus of claim 1, wherein: The bottom of the screening frame (4) is fixedly connected to a positioning frame (15), and a fixing rod (16) is slidably connected inside the positioning frame (15). A connecting shell (17) is fixedly connected to the bottom of the fixing rod (16), and an auxiliary roller (18) is rotatably connected inside the connecting shell (17). A second spring (19) is fixedly connected between the top of the connecting shell (17) and the positioning frame (15), and a limit ring (20) is fixedly connected to the top of the fixing rod (16).
7. The apparatus of claim 1, wherein: The bottom sides of the screening box (4) are fixedly connected to a fixing plate (21), and the inside of the fixing plate (21) is slidably connected to a support rod (6) fixed to the inner wall of the processing shell (1).