Wood waste shredding apparatus

Abstract

The application discloses a wood waste crushing treatment device, which comprises a crushing box and a transmission mechanism, and a crushing roller, a material guide plate, a magnetic separation mechanism, a heat exchange mechanism and a discharging mechanism are sequentially arranged in the crushing box from top to bottom; the magnetic separation mechanism comprises a metal roller, one side of the metal roller is fixedly connected with a rotating shaft two, and the other side is provided with an opening; the rotating shaft two penetrates through the side wall of the crushing box and is rotationally connected with the side wall. The wood waste crushing treatment device adopts an integrated design of sequentially arranging the crushing roller, the magnetic separation mechanism, the heat exchange mechanism and the discharging mechanism in the crushing box from top to bottom, solves the problems of traditional wood waste treatment, such as needing multiple devices for separate transportation, low process connection efficiency, and the metal impurities being easy to scratch and damage the subsequent heat exchange components after crushing, realizes continuous and integrated treatment of wood waste crushing, ferromagnetic impurity separation and free formaldehyde removal, and improves the overall treatment efficiency and the service life of the components while reducing the equipment occupation.

Description

Technical Field

[0001] This invention belongs to the technical field of solid waste resource utilization equipment, and particularly relates to a wood waste crushing and processing device. Background Technology

[0002] Wooden pallets are widely used cargo-carrying devices in the logistics and warehousing industry. During the large-scale production of wooden pallets, a large amount of wood trimming scraps and processing waste are continuously generated. At the same time, discarded and recycled wooden pallets also require resource recovery. The industry typically crushes and processes this wood waste into wood chips / flakes, which are then used in the production of recycled boards, pallet filler, or biomass fuel production, thereby reducing raw material loss and production costs.

[0003] The conventional wood shredding equipment currently used by wood pallet manufacturers has the following shortcomings in actual use:

[0004] Firstly, production waste materials and recycled waste pallets generally contain ferromagnetic impurities such as iron nails, staples, and metal connectors. Conventional crushing equipment does not have a synchronous sorting function. Metal impurities can easily cause the crushing roller blades to break and increase the equipment failure rate. Moreover, the metal shavings mixed in after crushing will reduce the quality of recycled wood and cannot be directly reused in the pallet production process.

[0005] Secondly, the splicing of wooden pallets mostly uses urea-formaldehyde adhesives, and a large amount of free formaldehyde remains inside the waste. After the wood chips are crushed, the specific surface area increases significantly, and the formaldehyde will be released into the workshop environment quickly, which will harm the health of the operators. However, the existing crushing equipment does not have a matching formaldehyde removal treatment structure, and an additional independent heating formaldehyde removal equipment is required. The process is scattered and occupies a large area, which is difficult to adapt to the workshop layout and cost control needs of most wooden pallet manufacturers.

[0006] Third, some solutions that use a split-processing approach require multiple machines to complete the crushing, impurity removal, and formaldehyde removal processes. This results in multiple material transfers that can easily generate dust pollution. Furthermore, the process integration efficiency is low and the manual maintenance costs are high, which cannot meet the needs of wooden pallet manufacturers for continuous and low-cost waste resource utilization.

[0007] Therefore, we propose a wood waste crushing and processing device. Summary of the Invention

[0008] To address the problems in the prior art, the present invention proposes the following technical solution:

[0009] A wood waste crushing and processing device includes a crushing box and a transmission mechanism. The crushing box contains, from top to bottom, a crushing roller, a guide plate, a magnetic sorting mechanism, a heat exchange mechanism, and a feeding mechanism.

[0010] The magnetic sorting mechanism includes a metal drum. A rotating shaft is fixedly connected to one side of the metal drum, and an opening is provided on the other side. The rotating shaft passes through the side wall of the crushing box and is rotatably connected to it. A sealing disc is rotatably fitted at the opening of the metal drum. A hollow tube is fixedly fitted inside the inner ring of the sealing disc. One end of the hollow tube is rotatably connected to the inner wall of the metal drum, and the other end passes through the crushing box. An electromagnet is provided inside the metal drum and is fixedly connected to the hollow tube. The crushing roller drives the rotating shaft to rotate simultaneously through a transmission mechanism, driving the metal attracted outside the metal drum to rotate to the side away from the electromagnet.

[0011] The heat exchange mechanism includes a heat exchange tube and a heating plate. The two ends of the heat exchange tube are respectively fixedly connected to a transfer tube one and a transfer tube two. The heating plate is fixed on the inner wall of the crushing box. The transfer tube one and the transfer tube two are connected to the heating plate. The heat generated by the electromagnet is used to heat the wood chips falling on the heating plate through the internal fluid heat exchange medium, so that the free formaldehyde inside the wood chips is released in batches in advance.

[0012] As a preferred embodiment of the above technical solution, the guide plate is located between the crushing roller and the metal drum, and the electromagnet is fan-shaped with its center of gravity offset to the side away from the guide plate. The guide plate guides the wood chips crushed by the crushing roller to the side where the center of gravity of the electromagnet is offset.

[0013] As a preferred embodiment of the above technical solution, each end of the two crushing rollers is fixedly connected to a rotating shaft, which penetrates the side wall of the crushing roller and is rotatably connected to it. The outer rings of the two rotating shafts are fixedly fitted with gears, which mesh with each other. A detachable motor is installed on the outside of the crushing box, and the output end of the motor is fixedly connected to the end of any one of the rotating shafts.

[0014] As a preferred embodiment of the above technical solution, the transmission mechanism includes a driving wheel, a driven wheel, and a transmission belt. The driving wheel is fixedly sleeved on the outer ring of the first rotating shaft, and the driven wheel is fixedly sleeved on the outer ring of the second rotating shaft. The driving wheel and the driven wheel are driven by the transmission belt, causing the metal adsorbed on the outer surface of the metal drum to rotate away from the center of the electromagnet.

[0015] As a preferred embodiment of the above technical solution, a metal discharge port is provided on one side of the crushing box, a hopper is fixedly installed on the metal discharge port, and a scraper is fixedly installed on one side of the hopper. The scraper is located on the side away from the center of gravity of the electromagnet and is in contact with the outer side of the metal drum.

[0016] As a preferred embodiment of the above technical solution, the heating plate is arched, with the falling wood chips landing at the top center, and the internal circulation channels of the heating plate adopt, but are not limited to, an "S" shape.

[0017] As a preferred embodiment of the above technical solution, the feeding mechanism includes baffles located on both sides of the heating plate. One side of the baffle is rotatably connected to the inner wall of the crushing box, and a rotating shaft is fixedly installed on the other side. The rotating shaft passes through the side wall of the crushing box and is rotatably connected to it. A drive mechanism that rotates with the baffle about the rotating shaft is installed on the outside of the crushing box.

[0018] As a preferred embodiment of the above technical solution, the driving mechanism includes a hydraulic cylinder, which is detachably installed on the outside of the crushing box. The output end of the hydraulic cylinder is fixedly connected to the hydraulic cylinder. The outer ring of the rotating shaft three located outside the crushing box is fixedly fitted with a gear two, which meshes with a rack for transmission.

[0019] As a preferred embodiment of the above technical solution, a slag outlet is provided on one side of the crushing box, and a pull-out wood chip recycling box is provided at the slag outlet. A handle is fixedly installed on the outside of the wood chip recycling box, and the wood chip recycling box is located below the heating plate and the baffle. After the baffle is rotated away from the heating plate, the wood chips will automatically slide into the interior of the wood chip recycling box.

[0020] As a preferred embodiment of the above technical solution, a dustproof net is fixedly installed on the side wall of the crushing box. The dustproof net is located between the metal drum and the baffle and is used to discharge harmful gases such as formaldehyde.

[0021] The beneficial effects of this invention are as follows:

[0022] 1. This invention adopts an integrated design in which crushing rollers, magnetic sorting mechanism, heat exchange mechanism and feeding mechanism are arranged from top to bottom in the crushing box. This solves the problems of traditional wood waste treatment requiring multiple equipment for separate transfer, low process connection efficiency, and easy damage to subsequent heat exchange components by metal impurities after crushing. It realizes continuous integrated treatment of wood waste crushing, ferromagnetic impurity separation and free formaldehyde removal, while reducing the equipment footprint and improving the overall processing efficiency and component life.

[0023] 2. This invention adopts a magnetic sorting design using a fixed fan-shaped electromagnet combined with a rotating metal drum, which solves the problem that conventional magnetic impurity removal devices need to stop to clean the metal and cannot continuously separate and discharge materials. It realizes the continuous automatic adsorption and desorption of ferromagnetic metal impurities, and can complete the separation and centralized collection of metal impurities without interrupting the crushing process.

[0024] 3. The present invention adopts an arched heating plate with an internal S-shaped circulating channel heat exchange mechanism design, which solves the problem of uneven heating of wood chips and short heat contact time leading to insufficient release of free formaldehyde. It realizes uniform heating of wood chips as they slowly slide down the slope, improving the degree of free formaldehyde removal while avoiding local high temperature causing wood chip carbonization.

[0025] 4. This invention adopts a belt drive design with a single power source shared by the crushing roller and the metal drum, which solves the problems of high cost and poor operation synchronization of multi-station independent drive equipment, realizes the synchronous linkage operation of the crushing process and the magnetic attraction sorting process, simplifies the power system structure, and reduces equipment manufacturing cost and operating energy consumption. Attached Figure Description

[0026] Figure 1 The diagram shown is a structural schematic of the wood waste crushing and processing device in the embodiment.

[0027] Figure 2 The diagram shown is a structural schematic of the pulverizing chamber in the embodiment;

[0028] Figure 3 The diagram shown is a structural schematic of the metal roller in the embodiment;

[0029] Figure 4 The diagram shown is a structural schematic of the transmission mechanism in the embodiment;

[0030] Figure 5 The diagram shown is a structural schematic of the crushing roller in the embodiment;

[0031] Figure 6 The diagram shown is a structural schematic of the electromagnet and heating plate in the embodiment;

[0032] Figure 7 The diagram shown is a structural schematic of the heat exchange tube in the embodiment.

[0033] Explanation of reference numerals in the attached figures:

[0034] 10. Crushing box; 11. Crushing roller; 12. Shaft 1; 13. Gear 1; 14. Dustproof net; 15. Motor; 16. Feed hopper; 17. Scraper; 18. Guide plate; 20. Transmission mechanism; 21. Drive wheel; 22. Driven wheel; 23. Transmission belt; 30. Magnetic sorting mechanism; 31. Metal drum; 32. Shaft 2; 33. Sealing disc; 34. Hollow tube; 35. Electromagnet; 40. Heat exchange mechanism; 41. Heat exchange tube; 42. Transfer pipe 1; 43. Transfer pipe 2; 44. Heating plate; 50. Feeding mechanism; 51. Baffle; 52. Shaft 3; 53. Gear 2; 60. Drive mechanism; 61. Hydraulic cylinder; 62. Rack; 70. Wood chip recycling box. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0036] Example

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the wood waste crushing and processing device includes a crushing box 10 and a transmission mechanism 20. Inside the crushing box 10, from top to bottom, are installed a crushing roller 11, a guide plate 18, a magnetic sorting mechanism 30, a heat exchange mechanism 40, and a feeding mechanism 50. The magnetic sorting mechanism 30 includes a metal roller 31. A rotating shaft 32 is fixedly connected to one side of the metal roller 31, and an opening is provided on the other side. The rotating shaft 32 passes through the side wall of the crushing box 10 and is rotatably connected to it. A sealing disc 33 is rotatably fitted at the opening of the metal roller 31. A hollow tube 34 is fixedly fitted inside the sealing disc 33. One end of the hollow tube 34 is rotatably connected to the inner wall of the metal roller 31, and the other end passes through the crushing box 10. An electromagnet 35 is fixedly connected to the hollow tube 34 inside the metal roller 31. The hollow tube 34 is electrically connected to the electromagnet 35. When the power is on, the electromagnet 35 generates magnetism, and when the power is off, the electromagnet 35 loses magnetism. The crushing roller 11 drives the rotating shaft 32 to rotate simultaneously through the transmission mechanism 20, driving the metal adsorbed outside the metal drum 31 to rotate to the side away from the electromagnet 35. The heat exchange mechanism 40 includes a heat exchange tube 41 and a heating plate 44. The two ends of the heat exchange tube 41 are respectively fixedly connected to the first and second transfer tubes 42 and 43. The heating plate 44 is fixed on the inner wall of the crushing box 10. The first and second transfer tubes 42 and 43 are connected to the heating plate 44 to form a circuit. The heat generated by the electromagnet 35 is heated by the internal fluid heat exchange medium to heat the wood chips falling above the heating plate 44, allowing the free formaldehyde inside the wood chips to be released in batches in advance.

[0038] Specifically, after the wood waste is fed from the top of the crushing box 10, it completes the entire process of crushing, guiding, metal removal, formaldehyde removal, and collection by its own gravity. In the magnetic sorting mechanism 30, the electromagnet 35 is fixed to the hollow tube 34 and remains stationary. When energized, the magnetic field generated penetrates the wall of the weakly magnetic metal drum 31 and attracts ferromagnetic metal impurities in the wood chips. The metal drum 31 rotates continuously under the drive of the second rotating shaft 32, transporting the metal impurities attracted to the drum wall to the area without a magnetic field. The heat exchange mechanism 40 adopts a fluid circulation heat exchange mode. The heat exchange medium circulates through the heat exchange tube 41, the first transfer tube 42, and the second transfer tube 43 in the internal flow channel of the heating plate 44, continuously providing a stable heat source for the heating plate 44. After completing heat exchange with the wood chips, it flows back in circulation. The sealing disc 33 and the hollow tube 34 work together to ensure the coaxiality of the metal roller 31 and to seal the opening of the metal roller 31 to prevent sawdust and dust from entering the interior of the metal roller 31 and affecting the operation of the electromagnet 35. The hollow tube 34 also serves as a passage for the power supply line of the electromagnet 35, realizing the internal protection of the line.

[0039] This device adopts an integrated design, effectively saving material transfer links between multiple devices, significantly reducing the equipment footprint, and improving processing continuity and efficiency. The 31-roller magnetic separator enables continuous and automatic separation of metal impurities without requiring downtime for cleaning, ensuring uninterrupted material processing. The closed-loop fluid heat exchange provides uniform and gentle heating, promoting the early release of free formaldehyde from wood chips in batches, reducing environmental risks during subsequent wood chip recycling. Built-in wiring and a sealed structure enhance the stability and lifespan of the equipment, reducing internal dust accumulation and malfunctions.

[0040] like Figure 2 and Figure 3 As shown, the guide plate 18 is located between the crushing roller 11 and the metal drum 31. The electromagnet 35 is fan-shaped and its center of gravity is offset to the side away from the guide plate 18. The guide plate 18 guides the wood chips crushed by the crushing roller 11 to the side of the electromagnet 35 where the center of gravity is offset, i.e., area A.

[0041] Specifically, the guide plate 18 adopts an inclined guiding structure to collect the scattered wood chips after crushing and accurately guide them to the strong magnetic field area A of the fan-shaped electromagnet 35 on the surface of the metal roller 31. The fan-shaped electromagnet 35 is eccentrically arranged, forming a strong adsorption magnetic field covering the arc surface of the metal roller 31 only on the feeding side, while the magnetic field strength on the other side decreases rapidly with the angle, forming the desorption area B.

[0042] Centralized material feeding prevents sawdust from falling directly from the side of the metal drum 31 without magnetic attraction, ensuring that all sawdust passes through the strong magnetic field area, significantly improving the removal rate of ferromagnetic impurities. The fan-shaped eccentric structure eliminates the need for electromagnets 35 to be arranged around the entire circumference, reducing equipment energy consumption and manufacturing costs. At the same time, the boundary between the adsorption and desorption zones is clear, ensuring thorough desorption of metal impurities and preventing them from being carried into the next process with the sawdust.

[0043] like Figure 1 , Figure 4 and Figure 5 As shown, both ends of the two crushing rollers 11 are fixedly connected to a rotating shaft 12. The rotating shaft 12 passes through the side wall of the crushing roller 11 and is rotatably connected to it. The outer ring of the two rotating shafts 12 is fixedly fitted with a gear 13. The two gears 13 mesh with each other. A detachable motor 15 is installed on the outside of the crushing box 10. The output end of the motor 15 is fixedly connected to the end of any one of the rotating shafts 12.

[0044] Specifically, a single motor 15 drive scheme is adopted. The output torque of motor 15 drives the active side rotating shaft 12 to rotate. Through two meshing synchronous gears 13, the two crushing rollers 11 are driven to rotate synchronously in opposite directions. The squeezing, shearing and tearing action of the roller teeth is used to crush the wood waste entering the roller gap.

[0045] The gear 13 meshing transmission ensures that the rotational speed of the two crushing rollers 11 is strictly synchronized, the roller teeth mesh precisely, the crushed particle size is uniform, and the problems of material jamming and uneven wear are not easy to occur. The single motor 15 drive simplifies the power system, reduces the equipment manufacturing cost and operating energy consumption, and the detachable motor 15 facilitates later maintenance, replacement and repair.

[0046] like Figure 3 , Figure 4 and Figure 5 As shown, the transmission mechanism 20 includes a driving wheel 21, a driven wheel 22, and a transmission belt 23. The driving wheel 21 is fixedly sleeved on the outer ring of the rotating shaft 12, and the driven wheel 22 is fixedly sleeved on the outer ring of the rotating shaft 22. The driving wheel 21 and the driven wheel 22 are driven by the transmission belt 23, which causes the metal adsorbed on the outer surface of the metal roller 31 to rotate to the side away from the center of the electromagnet 35, i.e., area B.

[0047] Specifically, the first shaft 12 of the crushing roller 11 serves as the power output end. The driving wheel 21 rotates synchronously with the first shaft 12, and the driven wheel 22 rotates through the friction of the transmission belt 23, thereby transmitting power to the second shaft 32 and driving the metal drum 31 to rotate at a uniform speed. By matching the transmission ratio between the driving wheel 21 and the driven wheel 22, the surface linear velocity of the metal drum 31 is adapted to the crushing output.

[0048] The crushing and magnetic sorting processes share the same power source, eliminating the need for an additional drive motor 15, further simplifying the equipment structure and reducing costs. The belt drive provides cushioning and vibration reduction, adapting to fluctuating sawdust loads and operating with low noise. The synchronized operation mode ensures that the metal adsorption and transfer rhythm matches the crushing output, preventing material accumulation on the drum surface or insufficient adsorption.

[0049] like Figure 1 , Figure 2 and Figure 3 As shown, a metal feeding port is provided on one side of the crushing box 10. A feeding hopper 16 is fixedly installed on the metal feeding port. A scraper 17 is fixedly installed on one side of the feeding hopper 16. The scraper 17 is located on the side away from the center of gravity of the electromagnet 35 and is in contact with the outer side of the metal roller 31. When the metal attracted to the outer side of the metal roller 31 moves to area B and approaches the scraper 17, the metal will come to the magnetic attraction range away from the electromagnet 35.

[0050] Specifically, when the metal impurities adsorbed on the surface of the metal drum 31 roll and rotate to the desorption zone B, they are removed from the strong magnetic field range of the electromagnet 35, and the magnetic attraction force weakens significantly until it disappears. The scraper 17 adheres to the surface of the metal drum 31 with a certain pressure, forming a scraping force on the metal impurities that have lost their magnetism. Combined with the metal's own gravity, the impurities are detached from the surface of the metal drum 31, fall into the hopper 16, and are discharged from the equipment through the metal discharge port for recycling.

[0051] The scraper 17, combined with magnetic field attenuation, achieves dual desorption, thoroughly removing even fine iron filings and wires. This prevents metal impurities from entering subsequent heat exchange processes with the wood chips and protects components such as the heating plate 44 from damage by hard objects. An independent metal feeding channel separates and collects metal and wood chips, eliminating the need for subsequent manual sorting and increasing the level of automation.

[0052] like Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, the heating plate 44 is arched, and the wood chips falling from above land at the top center. The internal circulation pipes of the heating plate 44 adopt, but are not limited to, the "S" shape.

[0053] Specifically, the arched heating plate 44 forms a slope that is high in the middle and low on both sides. After the wood chips fall from the top center, they slide slowly to both sides along the arch under the action of gravity, prolonging the contact heating time between the wood chips and the plate. The internal S-shaped flow channel prolongs the flow path of the heat exchange medium in the plate, making the temperature distribution on the plate surface more uniform, and the heat of the heat exchange medium can be fully transferred to the plate surface.

[0054] The arched slope allows the sawdust to spread naturally and slide down slowly, ensuring that the sawdust is fully heated without the need for an additional conveying mechanism, thus improving the uniformity and completeness of formaldehyde release. The S-shaped flow channel improves heat exchange efficiency, reduces heat waste of the heat exchange medium, and avoids excessive local temperature on the board that could lead to sawdust carbonization, ensuring stable sawdust quality.

[0055] like Figure 1 , Figure 2 and Figure 5 As shown, the feeding mechanism 50 includes baffles 51 located on both sides of the heating plate 44. One side of the baffle 51 is rotatably connected to the inner wall of the crushing box 10, and the other side is fixedly installed with a rotating shaft 52. The rotating shaft 52 passes through the side wall of the crushing box 10 and is rotatably connected to it. A drive mechanism 60 is installed on the outside of the crushing box 10, which rotates with the baffle 51 around the rotating shaft 52.

[0056] Specifically, when the baffle 51 is closed, it forms a temporary storage cavity together with the two side slopes of the arched heating plate 44, preventing the wood chips from falling directly and allowing the wood chips to remain on the surface of the heating plate 44 to complete the heat removal of formaldehyde. The drive mechanism 60 outputs torque to drive the rotating shaft 52 to rotate, which in turn drives the baffle 51 to flip outward around the hinge side and open, opening the bottom of the temporary storage cavity. The processed wood chips slide down the slope of the baffle 51 to the collection unit below.

[0057] The openable baffle 51 enables controllable adjustment of the wood chip heating time. By controlling the opening and closing cycle of the baffle 51, it can adapt to wood waste with different moisture contents and formaldehyde contents, ensuring sufficient formaldehyde release. The tilting unloading structure has low resistance and fast unloading speed, and the wood chips are not easy to stick and accumulate, avoiding the material from being retained and deteriorating for a long time.

[0058] like Figure 1 and Figure 5 As shown, the drive mechanism 60 includes a hydraulic cylinder 61, which is detachably installed on the outside of the crushing box 10. The output end of the hydraulic cylinder 61 is fixedly connected to the output end of the shaft 52 located outside the crushing box 10. The outer ring of the shaft 52 is fixedly fitted with a gear 53, which meshes with the rack 62 for transmission.

[0059] Specifically, the hydraulic cylinder 61 outputs linear reciprocating motion, driving the rack 62 connected to its piston rod to move horizontally in a linear motion. The rack 62 meshes with the second gear 53, converting the linear motion into the rotational motion of the second gear 53, which in turn drives the third rotating shaft 52 to rotate synchronously, realizing the opening and closing action of the baffle 51. By controlling the stroke of the hydraulic cylinder 61, the flipping angle of the baffle 51 can be precisely adjusted.

[0060] The hydraulic cylinder 61 has a large driving force and runs smoothly, which can stably bear the lateral pressure of the wood chips and ensure that the baffle 51 is tightly closed. The rack 62 and gear 53 have high transmission accuracy, and the opening and closing angle of the baffle 51 is controllable and can be flexibly adjusted according to the feeding speed requirements. The external drive mechanism 60 is easy to install, maintain and repair, and does not occupy the internal processing space of the crushing box 10.

[0061] like Figure 2 and Figure 4 As shown, a slag outlet is provided on one side of the crushing box 10. A pull-out wood chip recycling box 70 is provided at the slag outlet. A handle is fixedly installed on the outside of the wood chip recycling box 70. The wood chip recycling box 70 is located below the heating plate 44 and the baffle 51. After the baffle 51 is rotated away from the heating plate 44, the wood chips will automatically slide into the interior of the wood chip recycling box 70.

[0062] Specifically, the processed wood chips fall naturally from the opened baffle 51 under gravity, directly into the wood chip recycling box 70 below for centralized storage. When the wood chip recycling box 70 is full, the box can be pulled out along the discharge port using the handle, the wood chips can be transferred, and then it can be pushed back into its original position for continued use.

[0063] The pull-out sawdust recycling box (70mm) is easy to access, enabling centralized collection and rapid transfer of sawdust, thus improving the efficiency of material handling operations. The enclosed collection structure effectively reduces sawdust dust, improving the hygiene of the work site. The large capacity of the box reduces the frequency of material handling operations, lowering the workload.

[0064] like Figure 4As shown, a dustproof net 14 is fixedly installed on the side wall of the crushing box 10. The dustproof net 14 is located between the metal drum 31 and the baffle 51 and is used to discharge harmful gases such as formaldehyde.

[0065] Specifically, fine dust generated from wood chip crushing and gaseous pollutants such as formaldehyde released during heating accumulate inside the crushing chamber 10, but can then flow out through the mesh of the dustproof net 14. The mesh size of the dustproof net 14 is smaller than the diameter of the wood chip particles, which can prevent solid wood chip particles from leaking out, allowing only gas and fine dust to pass through. An external exhaust gas collection and treatment device can be connected to purify the exhaust gas.

[0066] Promptly remove formaldehyde gas released from inside the equipment to prevent harmful gases from accumulating inside the chamber and overflowing from the feed inlet, ensuring the health and safety of operators. A dustproof net (14mm) intercepts wood chips, reducing material waste and minimizing on-site dust pollution. Its breathable mesh structure prevents material blockage and ensures long-term operational stability.

[0067] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A wood waste crushing and processing device, comprising a crushing box (10) and a transmission mechanism (20), characterized in that: The crushing box (10) is equipped with a crushing roller (11), a guide plate (18), a magnetic sorting mechanism (30), a heat exchange mechanism (40), and a feeding mechanism (50) from top to bottom. The magnetic sorting mechanism (30) includes a metal drum (31). A rotating shaft (32) is fixedly connected to one side of the metal drum (31), and an opening is provided on the other side. The rotating shaft (32) passes through the side wall of the crushing box (10) and is rotatably connected to it. A sealing disc (33) is rotatably fitted at the opening of the metal drum (31). A hollow tube (34) is fixedly fitted on the inner ring of the sealing disc (33). One end of the hollow tube (34) is rotatably connected to the inner wall of the metal drum (31), and the other end passes through the crushing box (10). An electromagnet (35) is fixedly connected to the hollow tube (34) inside the metal drum (31). The crushing roller (11) drives the rotating shaft (32) to rotate simultaneously through the transmission mechanism (20), driving the metal attracted outside the metal drum (31) to rotate to the side away from the electromagnet (35). The heat exchange mechanism (40) includes a heat exchange tube (41) and a heating plate (44). The two ends of the heat exchange tube (41) are respectively fixedly connected to a first adapter tube (42) and a second adapter tube (43). The heating plate (44) is fixed on the inner wall of the crushing box (10). The first adapter tube (42) and the second adapter tube (43) are connected to the heating plate (44). The heat generated by the electromagnet (35) is heated by the internal fluid heat exchange medium to heat the wood chips falling on the heating plate (44), so that the free formaldehyde inside the wood chips is released in batches in advance.

2. The wood waste crushing and processing device according to claim 1, characterized in that, The guide plate (18) is located between the crushing roller (11) and the metal drum (31). The electromagnet (35) is fan-shaped and its center of gravity is offset to the side away from the guide plate (18). The guide plate (18) guides the wood chips crushed by the crushing roller (11) to the side where the center of gravity of the electromagnet (35) is offset.

3. The wood waste crushing and processing device according to claim 2, characterized in that, Both ends of the two crushing rollers (11) are fixedly connected to a rotating shaft (12). The rotating shaft (12) passes through the side wall of the crushing roller (11) and is rotatably connected to it. The outer ring of the two rotating shafts (12) is fixedly fitted with a gear (13). The two gears (13) mesh with each other. A detachable motor (15) is installed on the outside of the crushing box (10). The output end of the motor (15) is fixedly connected to the end of any one of the rotating shafts (12).

4. The wood waste crushing and processing device according to claim 3, characterized in that, The transmission mechanism (20) includes a drive wheel (21), a driven wheel (22) and a transmission belt (23). The drive wheel (21) is fixedly sleeved on the outer ring of the first rotating shaft (12), and the driven wheel (22) is fixedly sleeved on the outer ring of the second rotating shaft (32). The drive wheel (21) and the driven wheel (22) are driven by the transmission belt (23), causing the metal adsorbed on the outer surface of the metal roller (31) to rotate away from the center of the electromagnet (35).

5. The wood waste crushing and processing device according to claim 2, characterized in that, A metal discharge port is provided on one side of the crushing box (10), and a hopper (16) is fixedly installed on the metal discharge port. A scraper (17) is fixedly installed on one side of the hopper (16). The scraper (17) is located on the side away from the center of gravity of the electromagnet (35) and is in contact with the outer side of the metal roller (31).

6. The wood waste crushing and processing device according to claim 1, characterized in that, The heating plate (44) is arched, and the wood chips falling from above land at the top center. The internal circulation pipes of the heating plate (44) adopt, but are not limited to, the "S" shape.

7. The wood waste crushing and processing device according to claim 1, characterized in that, The feeding mechanism (50) includes baffles (51) located on both sides of the heating plate (44). One side of the baffle (51) is rotatably connected to the inner wall of the crushing box (10), and the other side is fixedly installed with a rotating shaft (52). The rotating shaft (52) passes through the side wall of the crushing box (10) and is rotatably connected to it. The outer side of the crushing box (10) is equipped with a drive mechanism (60) that rotates with the baffle (51) about the rotating shaft (52) as the axis.

8. The wood waste crushing and processing device according to claim 7, characterized in that, The drive mechanism (60) includes a hydraulic cylinder (61), which is detachably installed on the outside of the crushing box (10). The output end of the hydraulic cylinder (61) is fixedly connected to the hydraulic cylinder (61). The outer ring of the rotating shaft (52) located outside the crushing box (10) is fixedly fitted with a gear (53), which meshes with the rack (62) for transmission.

9. The wood waste crushing and processing device according to claim 8, characterized in that, The crushing box (10) has a slag outlet on one side, and a pull-out wood chip recycling box (70) is provided at the slag outlet. A handle is fixedly installed on the outside of the wood chip recycling box (70), and the wood chip recycling box (70) is located below the heating plate (44) and the baffle (51). After the baffle (51) is rotated away from the heating plate (44), the wood chips will automatically slide into the interior of the wood chip recycling box (70).

10. The wood waste crushing and processing device according to claim 7, characterized in that, The side wall of the crushing box (10) is fixedly equipped with a dustproof net (14), which is located between the metal drum (31) and the baffle (51) and is used to discharge harmful gases such as formaldehyde.

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