Dust falling and removing device for metal powder processing

Abstract

The invention relates to the technical field of dust removal equipment, and discloses a dust falling and removing device for metal powder processing, which comprises a dust removal tank, an air supply pipe and a water drainage pipe are respectively arranged at the upper end and the lower end of the dust removal tank, and the air supply pipe is connected with the outlet end of dust suction equipment; and the sprayer is arranged above the air supply pipe and is connected with water supply equipment through a water supply pipe. The sprayer adopts the combination of concentric annular pipes and branch pipes, atomizing nozzles are uniformly distributed on the lower end face to form a three-dimensional spraying area which covers the cross section of the whole dust removal tank, the upper end of a spiral blade of a spiral auger extends to an air outlet of an air supply pipe, large-particle dust in air flow is preliminarily intercepted during rotation, and the large-particle dust in the air flow is uniformly sprayed in cooperation with water mist sprayed above. And the inclined plane design at the upper end of the guide cylinder guides airflow to gather towards the center, so that the contact density of water drops and dust is further improved, effective sedimentation of micron-sized dust is ensured, and meanwhile, the energy loss is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of dust removal equipment, in particular to a dust reduction and removal device for metal powder processing. Background Art

[0002] In metal powder processing workshops, such as those involved in aluminum alloy powder preparation and lithium battery negative electrode material crushing, the shortcomings of traditional wet dust removal equipment significantly restrict production safety and environmental protection requirements. The specific issues are as follows: 1. The combination efficiency of dust and water mist is low, and the dust reduction effect is insufficient Traditional spray towers use a direct top spraying method, which shortens the contact path between the dust-laden airflow and the water mist, making it difficult to effectively capture micron-sized dust (such as aluminum powder with a particle size of ≤5μm); 2. Insufficient airflow utilization, high energy consumption and cost Traditional equipment uses an axial air intake design, and the airflow only stays in the tank for 1-2 seconds, which does not fully utilize the kinetic energy. To achieve a dust reduction effect that barely meets the standard, the spray volume needs to be increased by more than 30%, resulting in water consumption of 5-8 tons per ton of powder processed, which is a serious waste of water resources. At the same time, the long-term operation of high-energy-consuming fans (power ≥50kW) increases electricity costs. The above problems are particularly prominent in the processing scenarios of high-value-added metal powders, and there is an urgent need for an integrated solution for efficient dust reduction and resource recovery. Summary of the Invention

[0003] In order to solve the technical problems existing in the background technology, the present invention proposes a dust reduction and removal device for metal powder processing.

[0004] The present invention provides a dust reduction and removal device for metal powder processing, comprising a dust removal tank, wherein the upper and lower ends of the dust removal tank are respectively provided with an air supply pipe and a drainage pipe, and the air supply pipe is connected to the outlet end of the dust collection device. A sprayer is installed inside the dust removal tank, and the sprayer is arranged above the air supply pipe and connected to the water supply device through a water supply pipe. The interior of the dust removal tank is equipped with a centrally arranged spiral auger and a guide tube. The shaft end of the spiral auger extends to the outside of the dust removal tank and is driven by a motor. The sprayer is installed at the upper end of the spiral auger and rotates synchronously with it. The guide tube is installed on the inner wall of the dust removal tank and is mounted on the outer periphery of the spiral auger. The inner wall of the guide tube is provided with a spiral guide groove adapted to the spiral blade of the spiral auger. The edge of the spiral blade of the spiral auger extends into the spiral guide groove, and the lower end opening of the spiral guide groove is connected to the drain pipe.

[0005] As a further optimized solution of the present invention, the inner wall of the upper end of the dust removal tank is installed with a beveled gear ring opposite to the outer wall of the sprayer, and the internal rotation of the sprayer is installed with multiple screw assemblies that are radially evenly distributed. A spray head is installed on the threaded pair of each screw assembly, and the nozzle end of the spray head extends to the bottom of the sprayer. The end of each screw assembly close to the edge of the sprayer is connected to the beveled gear ring through a transmission assembly, and the rotation of the sprayer drives the screw assembly to drive the spray head to move linearly back and forth to spray.

[0006] As a further optimized solution of the present invention, the transmission assembly includes a first bevel gear and a second bevel gear, the first bevel gear is rotatably mounted on the inner wall of the sprayer, the second bevel gear is mounted on one end of the screw assembly close to the bevel gear ring and is meshed with the first bevel gear, and the edge of the first bevel gear extends to the outside of the sprayer and is meshed with the teeth on the bevel gear ring; The outer wall of the bevel gear ring is fixed to the upper inner wall of the dust removal tank. The upper end surface of the inner wall of the bevel gear ring is a bevel with the lower end of the bevel facing its center. The bevel has teeth evenly distributed circumferentially and is meshed with the first bevel gear.

[0007] As a further optimized solution of the present invention, the screw assembly includes a plurality of bidirectional screws connected in series and coaxially connected, each bidirectional screw having a thread pair, and a spray head mounted at the bottom of each thread pair, and a plurality of slide grooves are provided on the lower end surface of the sprayer, and the plurality of slide grooves are respectively arranged below the corresponding bidirectional screws to facilitate the horizontal reciprocating movement of the spray head for spraying; The middle fixed sleeve of the sprinkler is provided with a fixed sleeve, the outer wall of the fixed sleeve is rotatably connected to the end of the screw assembly away from the bevel gear ring, and the inner fixed sleeve is provided with a fixed tube, one end of the fixed tube extends downward and is fixed to the upper end of the spiral auger, and the other end of the fixed tube extends upward and is connected to the output end of the motor through a belt transmission structure; A connecting pipe is installed in the center of the fixed pipe. One end of the connecting pipe extends upward and is connected to the water supply pipe through a rotating joint. The other end of the connecting pipe extends downward and is connected to the corresponding nozzle through multiple hoses. The length of the hose is moderate so that it can move synchronously with the nozzle.

[0008] As a further optimized solution of the present invention, the upper end of the spiral blade of the spiral auger extends to the air outlet of the air supply pipe, and the spiral blade surface is opposite to the air outlet of the air supply pipe.

[0009] As a further optimized solution of the present invention, the axis of the air supply pipe is connected to the dust removal tank along the tangential direction of the edge of the spiral blade of the spiral auger.

[0010] As a further optimized solution of the present invention, the upper end surface of the guide tube is an inclined surface, and the lower end of the inclined surface faces the center line of the guide tube.

[0011] As a further optimized solution of the present invention, a hydrophobic sponge layer is arranged inside the spiral guide groove along the spiral direction, the surface of the hydrophobic sponge layer has a super-hydrophobic-low surface energy composite coating, and the sponge pore size of the hydrophobic sponge layer is greater than 50μm.

[0012] As a further optimized solution of the present invention, a bracket is installed at the bottom of the dust removal tank, and a vibrating screen similar to the lower end of the drain pipe is installed on the bracket. A water recovery box is provided under the screen of the vibrating screen, and a powder recovery box is provided at the lower end of the screen plate of the vibrating screen. An extension pipe is installed at the lower end of the drain pipe, and the extension pipe is parallel to the upper end inclined surface of the vibrating screen, and the bottom of the extension pipe is provided with multiple water outlets arranged along its length direction.

[0013] As a further optimized solution of the present invention, baffles arranged along the length direction of the vibrating screen are installed on both sides of the vibrating screen, and the two baffles are arranged opposite to each other to form a powder outlet channel.

[0014] The dust reduction and removal device for metal powder processing proposed by the present invention has the following beneficial effects: (1) The present invention arranges a spiral auger and a guide tube in the dust removal tank, and the air supply pipe is connected along the tangential direction of the spiral auger, so that the dust-laden airflow moves downward along the spiral guide groove, thereby extending the residence time of the airflow in the dust removal tank. At the same time, the spiral blades of the spiral auger cooperate with the spiral guide groove to promote the airflow to generate a rotating vortex, thereby increasing the probability of collision between dust and atomized water droplets of the sprayer, and significantly improving the combination efficiency. Compared with the traditional direct spraying method of the spray tower, the dust reduction efficiency is significantly improved, while reducing energy loss. (2) The sprayer of the present invention adopts a combination of concentric ring tubes and branch tubes, with atomizing nozzles evenly distributed on the lower end surface to form a three-dimensional spray area, covering the entire cross-section of the dust removal tank. The upper end of the spiral blade of the spiral auger extends to the air outlet of the air supply pipe. When rotating, it initially intercepts large particles of dust in the air flow. Combined with the fine water mist sprayed from above, it achieves a multi-stage dust reduction of "coarse particle pre-capture + fine dust atomization and sedimentation". The inclined surface design at the upper end of the guide tube guides the air flow to the center, further increasing the contact density between water droplets and dust, ensuring the effective sedimentation of micron-sized dust; (3) The present invention arranges a hydrophobic sponge layer within the spiral guide groove and coats the surface with a super-hydrophobic-low surface energy composite coating. The sponge pore size is greater than 50 μm. This design allows the water flow to carry dust through, while also preventing the sponge layer from saturating with water through its hydrophobic properties, thus avoiding the equipment clogging and corrosion problems caused by water retention in traditional wet dust removal. At the same time, the sponge layer intercepts residual dust in the airflow for a second time, improving dust removal accuracy. It is particularly suitable for handling high-concentration dust in metal powder processing. (4) The drainage pipe of the present invention is connected to the vibrating screen, and the screen separates water and powder. The water flows into the water recovery box for recycling, and the powder falls into the powder recovery box. The multiple water outlets of the extension pipe are evenly distributed, and cooperate with the inclined screen plate of the vibrating screen to ensure thorough solid-liquid separation. The baffle forms a powder outlet channel to prevent the recovered powder from scattering, achieving zero discharge of dust-reducing wastewater and recycling and reuse of metal powder, reducing production costs while reducing environmental pollution, in line with the concept of green production; (5) The spiral auger of the present invention is driven by a motor, and uses the rotational kinetic energy of the air flow to assist in dust reduction, reducing the energy consumption requirements of the spraying equipment. The tangential access method of the air supply pipe utilizes the principles of fluid mechanics to generate centrifugal force through the rotation of the air flow itself, thereby enhancing the mixing effect of dust and water droplets. Compared with traditional dust removal equipment, this device can reduce overall energy consumption, and at the same time reduce water resource waste through the vibration screen and recovery system, and significantly reduce the overall operating cost.

[0015] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the front cross-sectional structure of the dust removal tank of the present invention; Figure 3 For the present invention Figure 2 Schematic diagram of a local enlarged structure; Figure 4 Schematic diagram of the structure of the bracket of the present invention; Figure 5 This is a schematic diagram of the front cross-sectional structure of the sprayer of the present invention; Figure 6 It is a schematic diagram of the top structure of the sprinkler of the present invention.

[0017] Description of the drawings: 1. Dust removal tank; 2. Air supply pipe; 3. Water supply pipe; 4. Drain pipe; 5. Sprinkler; 6. Spiral auger; 7. Guide tube; 8. Spiral guide groove; 9. Hydrophobic sponge layer; 10. Bracket; 11. Vibrating screen; 12. Water recovery tank; 13. Powder recovery tank; 14. Extension pipe; 15. Baffle; 16. Bevel gear ring; 17. Screw assembly; 18. Sprinkler; 19. First bevel gear; 20. Second bevel gear; 21. Slide; 22. Fixing sleeve; 23. Fixing pipe; 24. Connecting pipe. DETAILED DESCRIPTION

[0018] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention, and are not to be construed as limiting the present invention.

[0019] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0020] like Figure 1 and Figure 2 As shown, a dust reduction and removal device for metal powder processing includes a dust removal tank 1, with an air supply pipe 2 and a drain pipe 4 at the upper and lower ends of the dust removal tank 1, respectively. The air supply pipe 2 is connected to the outlet end of the dust collection device. A sprayer 5 is installed inside the dust removal tank 1, and the sprayer 5 is arranged above the air supply pipe 2 and connected to the water supply device through a water supply pipe 3. The interior of the dust removal tank 1 is equipped with a centrally arranged spiral auger 6 and a guide tube 7. The axial end of the spiral auger 6 extends to the outside of the dust removal tank 1 and is driven by a motor. The sprayer 5 is installed at the upper end of the spiral auger 6 and rotates synchronously with it. The guide tube 7 is installed on the inner wall of the dust removal tank 1 and is sleeved on the periphery of the spiral auger 6. The inner wall of the guide tube 7 is provided with a spiral guide groove 8 adapted to the spiral leaf of the spiral auger 6. The edge of the spiral leaf of the spiral auger 6 extends into the spiral guide groove 8, and the lower end opening of the spiral guide groove 8 is connected to the drain pipe 4; To address the inadequate utilization of airflow in traditional wet dust removal, this design utilizes a spiral auger 6 and guide tube 7 to direct the dust-laden airflow into a spiral guide groove 8, forming a spiraling, descending vortex path. The air supply pipe 2 is connected tangentially to the auger, utilizing centrifugal force to move dust outward. Simultaneously, the auger 6 rotates at 200 rpm, with the clearance between its spiral blades and the spiral guide groove 8 controlled at 2-5 mm. This promotes high-speed rotation of the airflow, extending its residence time within the tank and increasing the probability of dust colliding with the water mist sprayed by the sprinkler 5.

[0021] like Figure 2 、 Figure 3 、 Figure 5 and Figure 6As shown, the inner wall of the upper end of the dust removal tank 1 is installed with a bevel gear ring 16 opposite to the outer wall of the sprayer 5. The interior of the sprayer 5 is rotatably installed with a plurality of radially evenly distributed screw assemblies 17. A spray head 18 is installed on the threaded pair of each screw assembly 17, and the nozzle end of the spray head 18 extends to the bottom of the sprayer 5. The end of each screw assembly 17 close to the edge of the sprayer 5 is connected to the bevel gear ring 16 through a transmission assembly. The rotation of the sprayer 5 drives the screw assembly 17 to drive the spray head 18 to move linearly back and forth for spraying. The sprayer 5 rotates synchronously with the spiral auger 6, and the first bevel gear 19 on its outer wall engages with the bevel gear ring 16, driving the screw assembly 17 to reciprocate. When the sprayer 5 rotates, the screw assembly 17 drives the spray head 18 to move back and forth in the radial direction. The nozzle coverage range is from the center to the edge of the dust removal tank, forming a dynamic spraying area. Compared with traditional fixed nozzles, it can increase the spray coverage area, avoid local spray blind spots, and ensure that the dust and water mist are evenly mixed across the entire cross-section.

[0022] Specifically, if Figure 5 As shown, the transmission assembly includes a first bevel gear 19 and a second bevel gear 20. The first bevel gear 19 is rotatably mounted on the inner wall of the sprayer 5. The second bevel gear 20 is mounted on one end of the screw assembly 17 close to the bevel gear ring 16 and is meshed with the first bevel gear 19. The edge of the first bevel gear 19 extends to the outside of the sprayer 5 and is meshed with the teeth on the bevel of the bevel gear ring 16. The outer wall of the bevel gear ring 16 is fixed to the inner wall of the upper end of the dust removal tank 1. The upper end surface of the inner wall of the bevel gear ring 16 is a bevel with the lower end of the bevel facing its center. The bevel has teeth evenly distributed circumferentially and is meshed with the first bevel gear 19. The bevel design of the bevel gear ring 16 guides the first bevel gear 19 to generate an axial component of force when rotating, so that the screw assembly 17 performs reciprocating motion synchronously. Every time the sprinkler 5 rotates one circle, the screw assembly 17 drives the sprinkler head 18 to complete an inward and outward reciprocating motion, ensuring that the sprinkler head 18 stays at different radial positions for a uniform time, avoiding excessive spraying in a single area, and helping to save water resources.

[0023] Furthermore, if Figure 5 As shown, the screw assembly 17 includes a plurality of coaxially connected bidirectional screws in series, each of which has a thread pair, and a spray head 18 is installed at the bottom of each thread pair. The lower end surface of the sprinkler 5 is provided with a plurality of slide grooves 21, which are respectively arranged below the corresponding bidirectional screws to facilitate the horizontal reciprocating movement of the spray head 18 for spraying. A fixed sleeve 22 is fixedly mounted on the middle part of the sprinkler 5. The outer wall of the fixed sleeve 22 is rotatably connected to the end of the screw assembly 17 away from the bevel gear ring 16. A fixed tube 23 is fixedly mounted inside the fixed sleeve 22. One end of the fixed tube 23 extends downward and is fixed to the upper end of the spiral auger 6. The other end of the fixed tube 23 extends upward and is connected to the output end of the motor through a belt drive structure. A connecting tube 24 is centrally installed inside the fixed tube 23. One end of the connecting tube 24 extends upward and is connected to the water supply pipe 3 through a rotary joint. The other end of the connecting tube 24 extends downward and is connected to the corresponding nozzle 18 through multiple hoses. The length of the hose is moderate so that it can move synchronously with the nozzle 18.

[0024] The bidirectional screw enables the nozzle 18 to be precisely positioned within the stroke, and the slide groove 21 limits the nozzle 18 to move only in the radial direction, ensuring that the spray trajectory is controllable. The fixed tube 23 drives the sprinkler 5 to rotate through the belt drive, and the rotary joint of the connecting tube 24 allows 360° rotation. The hose is made of high-pressure resistant polyurethane material, which keeps the water channel connected when the nozzle 18 moves, avoids entanglement and damage, and adapts to long-term and high-frequency operation.

[0025] Specifically, if Figure 3 As shown, the upper end of the spiral blade of the spiral auger 6 extends to the air outlet of the air supply pipe 2, and the spiral blade surface is opposite to the air outlet of the air supply pipe 2; The upper end of the spiral blade is 50-100mm away from the air outlet of the air supply pipe 2, forming a pre-capture barrier. When the dust-laden airflow is ejected at high speed, large particles of dust hit the spiral blade surface due to inertia and slide along the blade surface to the spiral guide groove 8. The pre-capture efficiency reaches more than 70%, which reduces the subsequent spraying load and reduces the risk of clogging of the nozzle 18.

[0026] Specifically, the axis of the air supply pipe 2 is connected to the dust removal tank 1 along the tangent direction of the edge of the spiral blade of the spiral auger 6; The tangential access angle is 45°, so that the airflow immediately forms a rotational motion after entering the dust removal tank. The initial rotation speed reaches 15m / s. The centrifugal force causes the dust to move toward the inner wall of the guide tube 7 and contact with the hydrophobic sponge layer 9 in the spiral guide groove 8, thereby achieving mechanical interception of coarse dust and creating eddy current conditions for subsequent atomization and sedimentation. Compared with axial access, the airflow rotation path is extended by 1.5 times, and the contact time between dust and water mist is significantly increased.

[0027] Specifically, if Figure 3 As shown, the upper end surface of the guide tube 7 is an inclined surface, and the lower end of the inclined surface faces the center line of the guide tube 7; The inclined plane has an inclination angle of 45°, guiding the rotating airflow to shrink toward the center, causing the dust concentration to increase by 2 times in the middle of the guide tube, forming a high-concentration area. Combined with the dynamic spraying of the sprinkler 5, the collision efficiency of fine dust and water mist is increased to more than 95%. Experimental data show that this design can make the outlet dust concentration ≤10mg / m³, far exceeding the 30mg / m³ standard of traditional equipment.

[0028] Specifically, if Figure 2 and Figure 3 As shown, a hydrophobic sponge layer 9 is arranged inside the spiral guide groove 8 along the spiral direction. The surface of the hydrophobic sponge layer 9 has a super-hydrophobic-low surface energy composite coating, and the sponge pore size of the hydrophobic sponge layer 9 is greater than 50 μm. The hydrophobic sponge layer 9 adopts a polyurethane base material and is coated with a fluorosilane coating on the surface. It has a pore size of 80μm, allowing water to carry dust through while preventing water retention. The sponge layer has a secondary interception efficiency of 85% for residual dust. Due to its hydrophobic properties, the sponge layer does not need to be cleaned frequently, and the maintenance cycle is extended to 15 days, reducing labor costs.

[0029] Specifically, if Figure 1 and Figure 4 As shown, a bracket 10 is installed at the bottom of the dust removal tank 1, and a vibrating screen 11 connected to the lower end of the drain pipe 4 is installed on the bracket 10. A water recovery box 12 is provided below the screen of the vibrating screen 11, and a powder recovery box 13 is provided at the lower end of the screen plate of the vibrating screen 11. An extension pipe 14 is installed at the lower end of the drain pipe 4. The extension pipe 14 is parallel to the upper end inclined surface of the vibrating screen 11, and the bottom of the extension pipe 14 is provided with a plurality of water outlets arranged along its length direction; The vibration frequency of the vibrating screen 11 is 60Hz, the mesh aperture is 100μm, and the solid-liquid separation efficiency reaches 98%. The outlet spacing of the extension pipe 14 is 100mm, which evenly distributes the water flow to avoid impact on the mesh and causing powder splashing. The water recycling rate of the water recovery tank 12 reaches 90%, and the water consumption per ton of powder processing is reduced to 1.5 tons, which is 80% less than that of traditional equipment. The dust collected by the powder recovery box 13 has a purity of 95% and can be directly returned to the furnace for reuse, reducing raw material loss.

[0030] Furthermore, if Figure 4 As shown, baffles 15 are installed on both sides of the vibrating screen 11 along its length direction. The two baffles 15 are arranged opposite to each other to form a powder outlet channel, which can guide the powder to fall into the recycling box along a fixed path to avoid scattering onto the workbench and keep the workshop clean. The baffle height is 50mm to prevent the powder from being raised during the vibration process, which meets the dust control requirements of environmental protection workshops.

[0031] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A dust removal device for metal powder processing, comprising a dust removal tank (1), wherein the upper and lower ends of the dust removal tank (1) are respectively provided with an air supply pipe (2) and a drain pipe (4), and the air supply pipe (2) is connected to the outlet end of the dust collection device, and a sprayer (5) is installed inside the dust removal tank (1), and the sprayer (5) is arranged above the air supply pipe (2) and connected to the water supply device through a water supply pipe (3), characterized in that: A centrally arranged spiral auger (6) and a guide tube (7) are installed inside the dust removal tank (1). The shaft end of the spiral auger (6) extends to the outside of the dust removal tank (1) and is driven by a motor. The sprayer (5) is installed at the upper end of the spiral auger (6) and rotates synchronously therewith. The guide tube (7) is installed on the inner wall of the dust removal tank (1) and is sleeved on the outer periphery of the spiral auger (6). The inner wall of the guide tube (7) is provided with a spiral guide groove (8) adapted to the spiral blade of the spiral auger (6). The edge of the spiral blade of the spiral auger (6) extends into the spiral guide groove (8), and the lower end opening of the spiral guide groove (8) is connected to the drain pipe (4).

2. The dust reduction and removal device for metal powder processing according to claim 1, characterized in that: The inner wall of the upper end of the dust removal tank (1) is provided with an inclined tooth ring (16) opposite to the outer wall of the sprayer (5), and the interior of the sprayer (5) is provided with a plurality of screw assemblies (17) uniformly distributed in the radial direction for rotation, and a spray head (18) is provided on the threaded pair of each screw assembly (17), and the nozzle end of the spray head (18) extends to the bottom of the sprayer (5), and one end of each screw assembly (17) close to the edge of the sprayer (5) is connected to the inclined tooth ring (16) through a transmission assembly, and the rotation of the sprayer (5) drives the screw assembly (17) to drive the spray head (18) to move linearly back and forth for spraying.

3. The dust reduction and removal device for metal powder processing according to claim 2, characterized in that: The transmission assembly includes a first bevel gear (19) and a second bevel gear (20), wherein the first bevel gear (19) is rotatably mounted on the inner wall of the sprayer (5), and the second bevel gear (20) is mounted on one end of the screw assembly (17) close to the bevel gear ring (16) and is meshed with the first bevel gear (19), and the edge of the first bevel gear (19) extends to the outside of the sprayer (5) and is meshed with the teeth on the bevel of the bevel gear ring (16).

4. The outer wall of the bevel gear ring (16) is fixed to the inner wall of the upper end of the dust removal tank (1), the upper end surface of the inner wall of the bevel gear ring (16) is a bevel and the lower end of the bevel faces its center, and the bevel has teeth evenly distributed in the circumferential direction and is meshed with the first bevel gear (19).

5. The dust reduction and removal device for metal powder processing according to claim 2, characterized in that: The screw assembly (17) includes a plurality of bidirectional screws connected in series and coaxially connected, each bidirectional screw having a thread pair, and a nozzle (18) is installed at the bottom of each thread pair, and a plurality of slide grooves (21) are provided on the lower end surface of the sprinkler (5), and the plurality of slide grooves (21) are respectively arranged below the corresponding bidirectional screws to facilitate the horizontal reciprocating movement of the nozzle (18) for spraying.

6. The middle fixed sleeve of the sprinkler (5) is provided with a fixed sleeve (22), the outer wall of the fixed sleeve (22) is rotatably connected to the end of the screw assembly (17) away from the bevel gear ring (16), and the inner fixed sleeve of the fixed sleeve (22) is provided with a fixed tube (23), one end of the fixed tube (23) extends downward and is fixed to the upper end of the spiral auger (6), and the other end of the fixed tube (23) extends upward and is connected to the output end of the motor through a belt transmission structure.

7. A connecting pipe (24) is centrally mounted inside the fixed pipe (23). One end of the connecting pipe (24) extends upward and is connected to the water supply pipe (3) through a rotary joint. The other end of the connecting pipe (24) extends downward and is connected to the corresponding nozzles (18) through a plurality of hoses. The length of the hoses is moderate so that they can move synchronously with the nozzles (18).

8. The dust reduction and removal device for metal powder processing according to claim 1, characterized in that: The upper end of the spiral blade of the spiral auger (6) extends to the air outlet of the air supply pipe (2), and the spiral blade surface is opposite to the air outlet of the air supply pipe (2).

9. The dust reduction and removal device for metal powder processing according to claim 1, characterized in that: The axis of the air supply pipe (2) is connected to the dust removal tank (1) along the tangential direction of the edge of the spiral blade of the spiral auger (6).

10. The dust reduction and removal device for metal powder processing according to claim 1, characterized in that: The upper end surface of the guide tube (7) is an inclined surface, and the lower end of the inclined surface faces the center line of the guide tube (7).

11. The dust reduction and removal device for metal powder processing according to claim 1, characterized in that: A hydrophobic sponge layer (9) is arranged inside the spiral guide groove (8) along the spiral line direction. The surface of the hydrophobic sponge layer (9) has a super-hydrophobic-low surface energy composite coating, and the sponge pore size of the hydrophobic sponge layer (9) is greater than 50 μm.

12. A dust reduction and removal device for metal powder processing according to any one of claims 1 to 8, characterized in that: A bracket (10) is installed at the bottom of the dust removal tank (1), and a vibrating screen (11) similar to the lower end of the drain pipe (4) is installed on the bracket (10). A water recovery box (12) is provided below the screen of the vibrating screen (11), and a powder recovery box (13) is provided at the lower end of the screen plate of the vibrating screen (11). An extension pipe (14) is installed at the lower end of the drain pipe (4), and the extension pipe (14) is parallel to the upper end inclined surface of the vibrating screen (11), and a plurality of water outlets are provided at the bottom of the extension pipe (14) along its length.

13. The dust reduction and removal device for metal powder processing according to claim 9, characterized in that: Baffles (15) are installed on both sides of the vibrating screen (11) and are arranged along the length direction thereof. The two baffles (15) are arranged opposite to each other to form a powder outlet channel.

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