Dust removal device and dust removal process for granular materials

Abstract

The invention discloses a dust removal device and a dust removal process for granular materials, and relates to the field of plastic processing. The invention discloses a dust removal device for granular materials. The dust removal device comprises a first dust removal unit and a second dust removal unit, the first dust removal unit comprises a boiling hopper, an adsorption assembly, a material conveying assembly, a dust removal cylinder and first meshes; the second dust removal unit comprises a dust removal box, a first feeding opening, a first discharging opening, a first material guide plate, a plurality of second meshes and a blowing and sucking module, the first material guide plate obliquely extends downwards in the horizontal direction, and a first air blowing opening and an air sucking opening are formed in the box wall of the dust removal box. According to the dust removal device, the boiling hopper on the dust removal device can make granular materials continuously turn over and collide with the dust removal cylinder, and the dust removal quality is effectively improved; and meanwhile, in the process that the granular materials move on the first material guide plate, impurities and dust adsorbed on the granular materials can be discharged outwards under the cooperation of a first air blowing opening and an air suction opening, and the dust removal quality is further improved.

Description

Technical Field

[0001] The present application relates to the field of plastic processing, and in particular to a dust removal device and a dust removal process for granular materials. Background Art

[0002] In the industrial production process of plastic products, in order to improve the quality of plastic products, it is usually necessary to remove dust from plastic particles to remove impurities and dust on the plastic particles. Especially for certain specific plastic particles (such as optical grade granular materials), dust removal is an essential step to ensure product purity and feasibility.

[0003] However, after dust removal, plastic particles still need to go through post-processing such as transfer and molding. During the transfer and molding process, plastic particles will collide with the transfer equipment or molding equipment. The burrs and edges on the plastic particles will separate from the plastic particles during the collision and form new dust, which greatly reduces the dust removal effect of the plastic particles and reduces the purity of the molded plastic products. Summary of the invention

[0004] One purpose of the present application is to overcome the deficiencies of the prior art and to provide a dust removal device for granular materials having a good dust removal effect.

[0005] The dust removal device provided in this application adopts the following technical solution: A dust removal device for granular materials, comprising a first dust removal unit and a second dust removal unit arranged up and down; The first dust removal unit comprises a boiling bucket, an adsorption assembly arranged at the upper end of the boiling bucket, a feeding assembly arranged at the lower end of the boiling bucket, a dust removal cylinder arranged in the boiling bucket, and a plurality of first meshes opened on the dust removal cylinder, the dust removal cylinder is connected with the adsorption assembly, a boiling cavity is formed between the dust removal cylinder and the boiling bucket, and the boiling cavity is connected with the feeding assembly; The second dust removal unit includes a hollow dust removal box, a first feed port opened at the upper end of the dust removal box and connected to the feeding assembly, a first discharge port opened at the lower end of the dust removal box, a first material guide plate arranged in the dust removal box, and a plurality of second mesh holes opened on the first material guide plate, the first material guide plate extends downwardly and obliquely in a horizontal direction, a first blowing port and a suction port are opened on the box wall of the dust removal box, the first blowing port is located on the lower side of the first material guide plate, and the suction port is located on the upper side of the first material guide plate, and the second dust removal unit also includes a blowing and suction module connected to the first blowing port and the suction port.

[0006] By adopting the above technical solution, the granular material can tumble in the boiling bucket and continuously collide with the dust removal cylinder to simulate the impact condition of the subsequent process and suck out the dust generated by the impact, thereby avoiding the granular material from generating new dust again in the subsequent process, and effectively improving the dust removal quality; at the same time, during the movement of the granular material on the first guide plate, the impurities and dust adsorbed on the granular material can be discharged outward with the cooperation of the first blowing port and the suction port, further improving the dust removal quality.

[0007] Preferably, the dust removal cylinder includes a first cylinder coaxially connected to the inner wall of the upper end of the boiling bucket, and a second cylinder coaxially connected to the lower end of the first cylinder, and the diameter of the first cylinder gradually decreases in the direction approaching the second cylinder.

[0008] By adopting the above technical solution, the granular material can move upward in a spiral under the cooperation of the first cylinder and the second cylinder, which effectively improves the collision frequency and collision uniformity between the plastic particles and the dust removal cylinder, and further improves the dust removal quality.

[0009] Preferably, the boiling bucket includes a first bucket body and a second bucket body which are arranged up and down and coaxially connected, the diameter of the second bucket body gradually decreases in the direction away from the first bucket body, the first cylinder body is accommodated in the first bucket body, and the two ends of the second cylinder body are respectively located in the first bucket body and the second bucket body.

[0010] By adopting the above technical solution, a conical boiling chamber can be formed between the second cylinder and the second bucket body, and between the first cylinder and the first bucket body, so that the granular material can spiral upward in the conical boiling chamber, effectively improving the impact frequency and impact uniformity between the granular material and the dust removal cylinder, and further improving the dust removal quality.

[0011] Preferably, the feed conveying assembly includes a feed conveying pipe extending in a vertical direction, a second feed inlet opened on the side of the feed conveying pipe, and a second feed outlet opened at the lower end of the feed conveying pipe. The upper end of the feed conveying pipe is connected to the boiling chamber, and a baffle plate is provided at the lower end. The baffle plate has a hinged portion hinged to the feed conveying pipe, and a gravity block is connected to the end of the hinged portion away from the baffle plate.

[0012] By adopting the above technical solution, the material blocking plate can block the second material outlet with the cooperation of the gravity block and the adsorption component, which effectively improves the material blocking effect of the material blocking plate.

[0013] Preferably, the first dust removal unit also includes a buffer bucket arranged below the boiling bucket, the feeding assembly and the first feed port are both connected to the buffer bucket, the buffer bucket includes a third bucket body and a fourth bucket body arranged up and down and coaxially connected, and the diameter of the fourth bucket body gradually decreases in the direction away from the third bucket body.

[0014] By adopting the above technical solution, the granular material can be buffered in the buffer hopper, thereby preventing too much granular material from entering the dust removal box at the same time and affecting the dust removal effect of the second dust removal unit.

[0015] Preferably, the second dust removal unit also includes a second material guide plate arranged in the dust removal box and below the first material guide plate, and a plurality of third mesh holes opened on the second material guide plate, the second material guide plate extends downwardly in a horizontal direction and its extension direction is set at an angle to the extension direction of the first material guide plate, and a second blowing port is opened on the box wall of the dust removal box, and the second blowing port is located on the lower side of the second material guide plate and is connected to the blowing and suction module.

[0016] By adopting the above technical solution, the second guide plate can cooperate with the first guide plate to extend the movement path of the granular material and improve the dust removal effect; at the same time, the first guide plate and the second guide plate set at an angle can change the movement direction and rolling posture of the granular material, effectively eliminating dust removal dead corners and improving the dust removal quality.

[0017] Preferably, the dust removal box has a first box wall and a second box wall that are arranged opposite to each other, and a third box wall located between the first box wall and the second box wall, one end of the first material guide plate is connected to the first box wall, and the other end is connected to a first fixing plate, the end of the first fixing plate away from the first material guide plate is connected to the dust removal box, one end of the second material guide plate is connected to the second box wall, and the other end is connected to a second fixing plate, the end of the second fixing plate away from the second material guide plate is connected to the dust removal box, and the first blowing outlet and the second blowing outlet are respectively opened on the third box wall.

[0018] By adopting the above technical solution, the connection strength between the first material guide plate, the second material guide plate and the dust removal box is effectively improved, thereby preventing the first material guide plate and the second material guide plate from deflecting during the dust removal process and affecting the dust removal effect.

[0019] Preferably, the blowing and suction module has a blowing part and a suction part, the blowing part is connected with the first blowing port and the second blowing port, the suction part is connected with the suction port, and a filter is arranged between the blowing part and the suction part.

[0020] Preferably, a static electricity removal module is respectively provided at the first feed port and the first discharge port.

[0021] By adopting the above technical solution, static electricity on the granular material can be effectively eliminated, impurities and dust can be prevented from being adsorbed on the granular material by static electricity, and the dust removal effect can be further improved.

[0022] Another object of the present application is to provide a dust removal process for granular materials.

[0023] A dust removal process provided in this application adopts the following technical solution: A dust removal process for granular material, the dust removal process is based on the above-mentioned dust removal device, and comprises the following steps: Step 1, turning on the adsorption component, the adsorption component continuously sucks the granular material into the boiling bucket and adsorbs the granular material entering the boiling bucket upward; Step 2: The granular material moves upward in a circumferential spiral around the dust collecting cylinder and continuously hits the dust collecting cylinder. Part of the impurities and dust on the granular material fall off after the impact, and the adsorption component sucks the fallen impurities and dust out through the first mesh hole; Step 3, closing the adsorption assembly, the granular material falls downward and enters the dust removal box through the first feed port; Step 4, the granular material entering the dust removal box moves along the extension direction of the first guide plate, the first blowing port blows air outwards and blows up the granular material on the first guide plate through the second mesh, the granular material tumbles on the first guide plate, the impurities and dust adsorbed on the granular material escape during the tumbling process, the suction port sucks the escaped impurities and dust outwards, and the granular material that has been dust-removed is discharged through the first discharge port.

[0024] By adopting the above technical solution, the granular material can tumble in the boiling bucket and continuously collide with the dust removal cylinder to simulate the impact condition of the subsequent process and suck out the dust generated by the impact, thereby avoiding the granular material from generating new dust again in the subsequent process, and effectively improving the dust removal quality; at the same time, during the movement of the granular material on the first guide plate, the impurities and dust adsorbed on the granular material can be discharged outward with the cooperation of the first blowing port and the suction port, further improving the dust removal quality.

[0025] In summary, the present invention includes at least one of the following beneficial technical effects: 1. The granular materials can tumble in the boiling bucket and continuously collide with the dust removal cylinder to simulate the impact condition of the subsequent process and suck out the dust generated by the impact, so as to prevent the granular materials from generating new dust again in the subsequent process, and effectively improve the dust removal quality; 2. When the granular material moves on the first guide plate, the impurities and dust adsorbed on the granular material can be discharged outwards with the cooperation of the first blowing port and the suction port, further improving the dust removal quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the three-dimensional structure of the dust removal device in Example 1 of the present application; Figure 2 is a longitudinal cross-sectional schematic diagram of the first dust removal unit in Example 1 of the present application; Figure 3 It is a schematic longitudinal cross-sectional view of the dust removal box in Example 1 of the present application.

[0027] Markings in the accompanying drawings: 1. boiling bucket; 1a. first bucket body; 1b. second bucket body; 2. Adsorption component; 2a. Adsorption tube; 2b. Negative pressure fan; 3. Material conveying assembly; 3a. Material conveying pipe; 3b. Second material inlet; 3c. Second material outlet; 3d. Material baffle plate; 3e. Gravity block; 4. Dust removal cylinder; 4a. First cylinder; 4b. Second cylinder; 5. First mesh; 6. boiling chamber; 7. dust removal box; 7a. first box wall; 7b. second box wall; 7c. third box wall; 8. First material inlet; 9. First material outlet; 10. First material guide plate; 11. Second mesh; 12. First air blowing port; 13. Air suction port; 14. Air blowing and suction module; 14a. Air blowing part; 14b. Air suction part; 14c. Filter; 15. Buffer bucket; 15a. Third bucket body; 15b. Fourth bucket body; 16. second material guide plate; 17. third mesh hole; 18. second air outlet; 19. First fixed plate; 19a. First plate body; 19b. Second plate body; 20. Second fixed plate; 21. Anti-static module; 22. Packing machine; 23. First feed pipe; 24. First discharge pipe; 25. First blowing chamber; 26. Second blowing chamber; 27. Frame. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-3 The present invention is described in further detail.

[0029] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] Example 1: See Figure 1-3 As shown, a dust removal device for granular materials is shown, and the granular materials are plastic particles. The dust removal device includes a frame 27, and the frame 27 is provided with a first dust removal unit, a second dust removal unit and a baler 22 from top to bottom. The baler 22 is connected to the second dust removal unit and is used to pack the plastic particles output from the second dust removal unit. Among them, the baler 22 is a prior art, and the specific structure and principle are not repeated.

[0031] In this embodiment, combined with Figure 2 As shown, the first dust removal unit includes a vertically arranged boiling bucket 1, an adsorption component 2 arranged at the upper end of the boiling bucket 1, a feeding component 3 arranged at the lower end of the boiling bucket 1, a dust removal cylinder 4 arranged in the boiling bucket 1, and a plurality of first mesh holes 5 opened on the dust removal cylinder 4, the dust removal cylinder 4 is connected with the adsorption component 2, a boiling cavity 6 is formed between the dust removal cylinder 4 and the boiling bucket 1, and the boiling cavity 6 is connected with the feeding component 3.

[0032] Among them, the adsorption component 2 includes an adsorption tube 2a connected to the upper end of the boiling bucket 1, and a negative pressure fan 2b connected to the adsorption tube 2a. The negative pressure fan 2b is a pulse variable frequency fan, which can be turned on and off intermittently, and its specific pulse frequency can be flexibly set according to the type of particles and different dust removal requirements; the feeding component 3 includes a feeding pipe 3a connected to the lower end of the boiling bucket 1 and extending in the vertical direction, a second feeding port 3b opened on the side of the feeding pipe 3a, and a second discharging port 3c opened at the lower end of the feeding pipe 3a. The second feeding port 3b is connected to the raw material bag of plastic particles or the granulation outlet of plastic particles.

[0033] Start the negative pressure fan 2b, the adsorption tube 2a intermittently inhales air and makes the boiling bucket 1 intermittently in a negative pressure state, the second feed port 3b sucks the plastic particles into the boiling bucket 1 under the action of negative pressure adsorption, the plastic particles spirally move upward around the dust removal cylinder 4 in the boiling chamber 6 and continuously impact the dust removal cylinder 4 under the action of the intermittently generated negative pressure adsorption force, during the impact process, some impurities (such as burrs, tails, etc.) and dust on the plastic particles fall off, and the impurities and dust that fall off are discharged outward through the first mesh 5 under the adsorption action of the adsorption tube 2a, thereby achieving one-step dust removal of the plastic particles. In this way, the tumbling and impact of the granular material in the boiling chamber 6 can simulate the impact condition of the subsequent process and absorb the dust generated by the impact, so as to prevent the granular material from generating new dust again in the subsequent process, and effectively improve the dust removal quality.

[0034] In this embodiment, the dust removal cylinder 4 includes a first cylinder 4a coaxially connected to the inner wall of the upper end of the boiling bucket 1, and a second cylinder 4b coaxially connected to the lower end of the first cylinder 4a, and the diameter of the first cylinder 4a gradually decreases in the direction approaching the second cylinder 4b; the boiling bucket 1 includes a first bucket body 1a and a second bucket body 1b arranged up and down and coaxially connected, and the diameter of the second bucket body 1b gradually decreases in the direction away from the first bucket body 1a, the first cylinder 4a is accommodated in the first bucket body 1a, and the two ends of the second cylinder 4b are respectively located in the first bucket body 1a and the second bucket body 1b.

[0035] A conical boiling chamber 6 can be formed between the cylindrical outer wall of the second cylinder 4b and the conical inner wall of the second bucket body 1b, and between the conical outer wall of the first cylinder 4a and the cylindrical inner wall of the first bucket body 1a. The plastic particles can spiral upward in the conical boiling chamber 6, effectively improving the impact frequency and impact uniformity between the granular material and the dust removal cylinder 4, and further improving the dust removal quality.

[0036] In this embodiment, a baffle plate 3d is provided at the lower end of the feed pipe 3a, and the baffle plate 3d has a hinged portion hinged to the feed pipe 3a, and a gravity block 3e is connected to the end of the hinged portion away from the baffle plate 3d, and the gravity block 3e is a gravity ball. Under the gravity of the gravity ball and the adsorption of the negative pressure fan 2b, the baffle plate 3d can continuously block the second discharge port 3c, effectively improving the baffle effect of the baffle plate 3d; and after the negative pressure fan 2b is turned off, the weight of the continuously falling plastic particles gradually exceeds the weight of the gravity ball and opens the baffle plate 3d, so that unloading can be achieved.

[0037] In this embodiment, the first dust removal unit further includes a buffer hopper 15 arranged upright below the boiling hopper 1, and the lower end of the feed pipe 3a is connected to the buffer hopper 15. The buffer hopper 15 includes a third hopper body 15a and a fourth hopper body 15b arranged up and down and coaxially connected, and the diameter of the fourth hopper body 15b gradually decreases in the direction away from the third hopper body 15a. After the granular material is discharged from the feed pipe 3a, it can enter the buffer hopper 15 and achieve material discharge buffering through the fourth hopper body 15b with a gradually decreasing diameter, so as to prevent too much granular material from entering the dust removal box 7 at the same time and affecting the dust removal effect of the second dust removal unit.

[0038] In this embodiment, combined with Figure 3 As shown, the second dust removal unit includes a hollow dust removal box 7, a first feed port 8 opened at the upper end of the dust removal box 7 and connected to the feed pipe 3a, a first discharge port 9 opened at the lower end of the dust removal box 7, a first guide plate 10 arranged in the dust removal box 7, and a plurality of second mesh holes 11 opened on the first guide plate 10. The first guide plate 10 extends downwardly in a horizontal direction. A first blowing port 12 and a suction port 13 are opened on the box wall of the dust removal box 7. The first blowing port 12 is located on the lower side of the first guide plate 10, and the suction port 13 is located on the upper side of the first guide plate 10. The second dust removal unit also includes a blowing and suction module 14 connected to the first blowing port 12 and the suction port 13.

[0039] Among them, the first feed port 8 is connected to the first feed pipe 23, and the first discharge port 9 is connected to the first discharge pipe 24. The first feed pipe 23 and the first discharge pipe 24 are both provided with a static electricity removal module 21, and the static electricity removal module 21 is an electrostatic ring in the prior art. The specific structure and principle of the electrostatic ring are not repeated; the blowing and suction module 14 is a blowing and suction fan, which is a prior art, and has a blowing part 14a and a suction part 14b. The blowing part 14a is connected to the first blowing port 12 and the second blowing port 18, and the suction part 14b is connected to the suction port 13. A filter 14c is provided between the blowing part 14a and the suction part 14b. The filter 14c is a prior art, and is used to filter the dust adsorbed by the suction part 14b, and then the filtered wind can be blown out from the blowing part 14a again.

[0040] After the plastic particles enter the dust removal box 7 through the first feed pipe 23, the static electricity on them is removed by the electrostatic ring, and then they fall onto the first guide plate 10 and move downward through the inclined surface of the first guide plate 10. While the plastic particles move downward, the blowing and suction fan is started, and the first blowing port 12 blows air outward, and the blown wind passes through the second mesh 11 to blow up the plastic particles on the first guide plate 10. The plastic particles tumble on the first guide plate 10 under the action of the blowing, and the remaining impurities and dust generated by the impact during the first dust removal are precipitated outward during the tumbling process, and the suction port 13 sucks out the precipitated impurities and dust, thereby realizing the second dust removal and further improving the dust removal quality. When the plastic particles after the dust removal are discharged through the first discharge pipe 24, the residual static electricity on them is completely removed to prevent the residual dust from being adsorbed on the plastic particles by static electricity.

[0041] In this embodiment, the second dust removal unit also includes a second material guide plate 16 arranged in the dust removal box 7 and below the first material guide plate 10, and a plurality of third mesh holes 17 opened on the second material guide plate 16. The second material guide plate 16 extends downwardly along the horizontal direction and its extension direction is set at an angle to the extension direction of the first material guide plate 10. A second blowing port 18 is opened on the wall of the dust removal box 7. The second blowing port 18 is located on the lower side of the second material guide plate 16 and is connected to the blowing and suction module 14.

[0042] After the plastic particles move to the end of the first guide plate 10, they fall down onto the second guide plate 16 and move downward through the inclined surface of the second guide plate 16. While the plastic particles move downward along the inclined surface of the second guide plate 16, the second blowing port 18 blows air outward, and the blown air passes through the third mesh 17 to blow up the plastic particles on the second guide plate 16. The plastic particles tumble on the second guide plate 16 under the action of the blowing air. During the tumbling process, the impurities and dust remaining on the plastic particles are completely precipitated, and the suction port 13 sucks out the precipitated impurities and dust. In this way, through the cooperation of the second guide plate 16 and the first guide plate 10, the movement path of the granular material can be extended, and the dust removal effect is improved; at the same time, the first guide plate 10 and the second guide plate 16 set at an angle can change the movement direction and tumbling posture of the granular material, effectively eliminating the dust removal dead angle and improving the dust removal quality.

[0043] In this embodiment, the head end of the first material guide plate 10 is located directly below the first material inlet 8, and the tail end of the second material guide plate 16 is located directly above the first material outlet 9. The dust removal box 7 has a first box wall 7a and a second box wall 7b that are oppositely arranged, and two third box walls 7c that are oppositely arranged and respectively located between the first box wall 7a and the second box wall 7b.

[0044] The first guide plate 10 is tilted downward along the direction from the first box wall 7a to the second box wall 7b, one end of which is connected to the first box wall 7a, and the other end is connected to the first fixing plate 19, and the two sides of the first guide plate 10 and the first fixing plate 19 are respectively connected to the two third box walls 7c. Among them, the first fixing plate 19 includes a first plate body 19a arranged vertically, a second plate body 19b connected to the lower end of the first plate body 19a, and the second plate body 19b is tilted downward along the direction from the second box wall 7b to the first box wall 7a and its end is connected to the first box wall 7a. In this way, the first guide plate 10 can be prevented from deflecting during the dust removal process and affecting its dust removal effect; at the same time, the first box wall 7a, the first guide plate 10, the first fixing plate 19 and the two third box walls 7c can enclose the first blowing chamber 25, and the first blowing port 12 is opened on the cavity wall of the first blowing chamber 25. When the first blowing port 12 blows outward, the blown wind will not escape outward, thereby improving the dust removal effect.

[0045] The second guide plate 16 is tilted downward along the direction from the second box wall 7b to the first box wall 7a, one end of which is connected to the second box wall 7b and the other end is connected to the second fixing plate 20, the second fixing plate 20 extends along the vertical direction and its lower end is connected to the bottom wall of the dust removal box 7, and the second guide plate 16 and the two sides of the second fixing plate 20 are respectively connected to the two third box walls 7c. In this way, the second guide plate 16 can be prevented from being deflected during the dust removal process to affect its dust removal effect; at the same time, the second guide plate 16, the second fixing plate 20, the second box wall 7b and the bottom wall of the dust removal box 7 can enclose a second blowing cavity 26, and the second blowing port 18 is opened on the cavity wall of the second blowing cavity 26. When the second blowing port 18 blows outward, the blown wind will not escape outward, thereby improving the dust removal effect.

[0046] Embodiment 2: This embodiment discloses a dust removal process for granular materials. The dust removal process is based on the dust removal device in Embodiment 1 and comprises the following steps: Step 1, turning on the adsorption component 2, the adsorption component 2 continuously sucks the granular material into the boiling bucket 1 and adsorbs the granular material entering the boiling bucket 1 upwards; Step 2, the granular material moves upward in a circumferential spiral around the dust removal cylinder 4 and continuously hits the dust removal cylinder 4, and some impurities and dust on the granular material fall off after the collision, and the adsorption component 2 sucks the fallen impurities and dust outward through the first mesh 5; Step 3, closing the adsorption assembly 2, the granular material falls downward and enters the dust removal box 7 through the first feed port 8 and removes static electricity during the process of entering; In step 4, the granular materials entering the dust removal box 7 move along the extension direction of the first guide plate 10 and the second guide plate 16 respectively, and the first blowing port 12 and the second blowing port 18 blow air outward and blow up the granular materials on the first guide plate 10 and the second guide plate 16 through the second mesh hole 11 and the third mesh hole 17, and the granular materials tumble on the first guide plate 10 and the second guide plate 16, and the impurities and dust adsorbed on the granular materials escape during the tumbling process, and the suction port 13 sucks out the escaped impurities and dust, and the granular materials after dust removal are discharged through the first discharge port 9.

[0047] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A dust removal device for granular material, characterized in that: It includes a first dust removal unit and a second dust removal unit arranged up and down; The first dust removal unit comprises a boiling bucket (1), an adsorption component (2) arranged at the upper end of the boiling bucket (1), a feeding component (3) arranged at the lower end of the boiling bucket (1), a dust removal cylinder (4) arranged in the boiling bucket (1), and a plurality of first mesh holes (5) opened on the dust removal cylinder (4), the dust removal cylinder (4) is connected with the adsorption component (2), a boiling cavity (6) is formed between the dust removal cylinder (4) and the boiling bucket (1), and the boiling cavity (6) is connected with the feeding component (3); The second dust removal unit comprises a hollow dust removal box (7), a first material feed port (8) opened at the upper end of the dust removal box (7) and connected to the material feeding assembly (3), a first material discharge port (9) opened at the lower end of the dust removal box (7), a first material guide plate (10) arranged in the dust removal box (7), and a plurality of second mesh holes (11) opened on the first material guide plate (10), the first material guide plate (10) extending downwardly in a horizontal direction, a first blowing port (12) and an air suction port (13) are opened on the box wall of the dust removal box (7), the first blowing port (12) is located on the lower side of the first material guide plate (10), and the air suction port (13) is located on the upper side of the first material guide plate (10), and the second dust removal unit also comprises a blowing and suction module (14) connected to the first blowing port (12) and the air suction port (13).

2. A dust removal device for granular materials according to claim 1, characterized in that: The dust removal cylinder (4) comprises a first cylinder (4a) coaxially connected to the inner wall of the upper end of the boiling bucket (1), and a second cylinder (4b) coaxially connected to the lower end of the first cylinder (4a), and the diameter of the first cylinder (4a) gradually decreases along the direction approaching the second cylinder (4b).

3. A dust removal device for granular materials according to claim 2, characterized in that: The boiling bucket (1) comprises a first bucket body (1a) and a second bucket body (1b) which are arranged vertically and coaxially connected, the diameter of the second bucket body (1b) gradually decreases in a direction away from the first bucket body (1a), the first cylinder body (4a) is accommodated in the first bucket body (1a), and the two ends of the second cylinder body (4b) are respectively located in the first bucket body (1a) and the second bucket body (1b).

4. A dust removal device for granular materials according to claim 1, characterized in that: The material conveying assembly (3) comprises a material conveying pipe (3a) extending in a vertical direction, a second material inlet (3b) opened at the side of the material conveying pipe (3a), and a second material outlet (3c) opened at the lower end of the material conveying pipe (3a); the upper end of the material conveying pipe (3a) is connected to the boiling chamber (6), and the lower end is provided with a baffle plate (3d); the baffle plate (3d) has a hinged portion hinged to the material conveying pipe (3a), and the end of the hinged portion away from the baffle plate (3d) is connected to a gravity block (3e).

5. A dust removal device for granular materials according to claim 1, characterized in that: The first dust removal unit also includes a buffer bucket (15) arranged below the boiling bucket (1), the feeding assembly (3) and the first feed port (8) are both connected to the buffer bucket (15), and the buffer bucket (15) includes a third bucket body (15a) and a fourth bucket body (15b) arranged up and down and coaxially connected, and the diameter of the fourth bucket body (15b) gradually decreases in a direction away from the third bucket body (15a).

6. A dust removal device for granular materials according to claim 1, characterized in that: The second dust removal unit also includes a second material guide plate (16) arranged in the dust removal box (7) and below the first material guide plate (10), and a plurality of third mesh holes (17) opened on the second material guide plate (16), the second material guide plate (16) extending downwardly along the horizontal direction and its extension direction is set at an angle to the extension direction of the first material guide plate (10), and a second blowing port (18) is opened on the box wall of the dust removal box (7), and the second blowing port (18) is located on the lower side of the second material guide plate (16) and is connected to the blowing and suction module (14).

7. A dust removal device for granular materials according to claim 6, characterized in that: The dust removal box (7) comprises a first box wall (7a) and a second box wall (7b) which are arranged opposite to each other, and a third box wall (7c) located between the first box wall (7a) and the second box wall (7b); one end of the first material guide plate (10) is connected to the first box wall (7a), and the other end is connected to a first fixing plate (19); the end of the first fixing plate (19) away from the first material guide plate (10) is connected to the dust removal box (7); one end of the second material guide plate (16) is connected to the second box wall (7b), and the other end is connected to a second fixing plate (20); the end of the second fixing plate (20) away from the second material guide plate (16) is connected to the dust removal box (7); the first air outlet (12) and the second air outlet (18) are respectively opened on the third box wall (7c).

8. A dust removal device for granular materials according to claim 6, characterized in that: The blowing and suction module (14) comprises a blowing part (14a) and a suction part (14b); the blowing part (14a) is connected to the first blowing port (12) and the second blowing port (18); the suction part (14b) is connected to the suction port (13); and a filter (14c) is provided between the blowing part (14a) and the suction part (14b).

9. A dust removal device for granular materials according to claim 1, characterized in that: The first feed port (8) and the first discharge port (9) are respectively provided with static electricity removal modules (21).

10. A dust removal process for granular material, characterized in that: The dust removal process is based on the dust removal device according to any one of claims 1 to 9, and comprises the following steps: Step 1, turning on the adsorption component (2), the adsorption component (2) continuously sucks the granular material into the boiling bucket (1) and adsorbs the granular material entering the boiling bucket (1) upwards; Step 2, the granular material moves upward in a circumferential spiral around the dust removal cylinder (4) and continuously impacts the dust removal cylinder (4), and some impurities and dust on the granular material fall off after the impact, and the adsorption component (2) sucks the fallen impurities and dust outward through the first mesh (5); Step 3, closing the adsorption assembly (2), and the granular material falls downward and enters the dust removal box (7) through the first feed port (8); In step 4, the granular material entering the dust removal box (7) moves along the extension direction of the first guide plate (10), the first blowing port (12) blows air outward and blows up the granular material on the first guide plate (10) through the second mesh hole (11), the granular material rolls on the first guide plate (10), the impurities and dust adsorbed on the granular material escape during the tumbling process, the suction port (13) sucks the escaped impurities and dust outward, and the granular material after dust removal is discharged through the first discharge port (9).

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