A dust removal device and dust removal process for granular material

Abstract

The present application discloses a dust removal device and dust removal process for granular materials, which relate to the field of plastic processing. The dust removal device for granular materials of the present application includes a first dust removal unit and a second dust removal unit; the first dust removal unit includes a boiling bucket, an adsorption component, a feeding component, a dust removal cylinder, and a first mesh; the second dust removal unit includes a dust removal box, a first feed port, a first discharge port, a first material guide plate, a plurality of second meshes, and a blowing and suction module. The first material guide plate extends downwardly along the horizontal direction, and a first blowing port and an air suction port are provided on the wall of the dust removal box. The dust removal device of the present application has a boiling bucket on it that can cause the granular material to continuously churn and collide with the dust removal cylinder, effectively improving the dust removal quality; at the same time, during the movement of the granular material on the first material 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 air suction port, further improving the dust removal quality.

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 of plastic products, dust removal is often necessary to improve the quality of plastic products and remove impurities and dust from the plastic particles. This is especially true for certain plastic particles, such as optical-grade granules, where dust removal is essential to ensure product purity and viability.

[0003] However, after dust removal, plastic particles still need to go through subsequent processes such as transport and molding. During this process, plastic particles may collide with the transport equipment or molding equipment. During this collision, the burrs and sharp corners on the plastic particles will break away from the plastic particles and form new dust. This 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 with good dust removal effect.

[0005] The dust removal device provided in this application adopts the following technical solution:

[0006] A dust removal device for granular materials, comprising a first dust removal unit and a second dust removal unit arranged vertically;

[0007] The first dust removal unit includes a boiling hopper, an adsorption assembly provided at the upper end of the boiling hopper, a material feeding assembly provided at the lower end of the boiling hopper, a dust removal cylinder provided in the boiling hopper, and a plurality of first mesh holes provided on the dust removal cylinder. The dust removal cylinder is in communication with the adsorption assembly, a boiling cavity is formed between the dust removal cylinder and the boiling hopper, and the boiling cavity is in communication with the material feeding assembly.

[0008] The second dust removal unit includes a hollow dust removal box, a first material feed port opened at the upper end of the dust removal box and connected to the material feeding assembly, a first material 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 in a horizontal direction. A first blowing port and an air 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 air suction port is located on the upper side of the first material guide plate. The second dust removal unit also includes a blowing and suction module connected to the first blowing port and the air suction port.

[0009] 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.

[0010] 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 along the direction approaching the second cylinder.

[0011] By adopting the above technical solution, the granular material can move spirally upward with the cooperation of the first cylinder and the second cylinder, effectively improving the collision frequency and collision uniformity between the plastic particles and the dust removal cylinder, and further improving the dust removal quality.

[0012] Preferably, the boiling bucket includes a first bucket body and a second bucket body 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.

[0013] By adopting the above technical solution, a conical boiling cavity can be formed between the second cylinder and the second bucket, and between the first cylinder and the first bucket, so that the granular material can spiral upward in the conical boiling cavity, effectively improving the impact frequency and impact uniformity between the granular material and the dust removal cylinder, and further improving the dust removal quality.

[0014] Preferably, the feeding assembly includes a feeding pipe extending in a vertical direction, a second feeding port opened on the side of the feeding pipe, and a second feeding port opened at the lower end of the feeding pipe. The upper end of the feeding 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 feeding pipe, and a gravity block is connected to the end of the hinged portion away from the baffle plate.

[0015] 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.

[0016] Preferably, the first dust removal unit also includes a buffer hopper arranged below the boiling hopper, the feeding assembly and the first feed port are both connected to the buffer hopper, and the buffer hopper includes a third hopper body and a fourth hopper body arranged up and down and coaxially connected, and the diameter of the fourth hopper body gradually decreases in the direction away from the third hopper body.

[0017] By adopting the above technical solution, the granular material can be buffered in the buffer hopper, avoiding excessive granular material from entering the dust removal box at the same time and affecting the dust removal effect of the second dust removal unit.

[0018] 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 along the horizontal direction and its extension direction is set at an angle to the extension direction of the first material guide plate. A second air blowing port is opened on the wall of the dust removal box, and the second air blowing port is located on the lower side of the second material guide plate and is connected to the blowing and suction module.

[0019] By adopting the above technical solution, the second guide plate can cooperate with the first guide plate, thereby extending the movement path of the granular material and improving 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 the dust removal blind spots and improving the dust removal quality.

[0020] Preferably, the dust removal box has a first box wall and a second box wall 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 the 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 the 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 air blowing outlet and the second air blowing outlet are respectively opened on the third box wall.

[0021] By adopting the above technical solution, the connection strength between the first guide plate and the second guide plate and the dust removal box is effectively improved, thereby preventing the first guide plate and the second guide plate from deflecting during the dust removal process and affecting the dust removal effect.

[0022] 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 provided between the blowing part and the suction part.

[0023] Preferably, a static electricity removal module is provided at the first feed port and the first discharge port respectively.

[0024] 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.

[0025] Another object of the present application is to provide a dust removal process for granular materials.

[0026] The dust removal process provided in this application adopts the following technical solution:

[0027] A dust removal process for granular material, based on the above-mentioned dust removal device, comprises the following steps:

[0028] Step 1: Turn on the adsorption component, which continuously absorbs the granular material into the boiling bucket and absorbs the granular material entering the boiling bucket upward;

[0029] Step 2: The granular material moves upward in a spiral around the dust collector and continuously impacts the dust collector. Part of the impurities and dust on the granular material falls off after the impact, and the adsorption component sucks the fallen impurities and dust out through the first mesh.

[0030] Step 3: close the adsorption assembly, and the granular material falls downward and enters the dust removal box through the first feed port;

[0031] In 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 outward and blows up the granular material on the first guide plate through the second mesh, the granular material rolls on the first guide plate, and the impurities and dust adsorbed on the granular material escape during the tumbling process, the suction port sucks out the escaped impurities and dust, and the granular material that has completed dust removal is discharged through the first discharge port.

[0032] 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.

[0033] In summary, the present invention includes at least one of the following beneficial technical effects:

[0034] 1. The granular materials can tumble in the boiling bucket and continuously collide with the dust collector to simulate the impact working conditions of the subsequent process and suck out the dust generated by the impact, thus preventing the granular materials from generating new dust again in the subsequent process and effectively improving the dust removal quality;

[0035] 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

[0036] Figure 1 is a schematic diagram of the three-dimensional structure of the dust removal device in Example 1 of the present application;

[0037] Figure 2 is a longitudinal cross-sectional schematic diagram of the first dust removal unit in Example 1 of the present application;

[0038] Figure 3 It is a schematic longitudinal cross-sectional view of the dust removal box in Example 1 of the present application.

[0039] In the accompanying drawings:

[0040] 1. Boiling bucket; 1a. First bucket body; 1b. Second bucket body;

[0041] 2. Adsorption assembly; 2a. Adsorption tube; 2b. Negative pressure fan;

[0042] 3. Material feeding assembly; 3a. Material feeding pipe; 3b. Second material feeding port; 3c. Second material discharging port; 3d. Material blocking plate; 3e. Gravity block;

[0043] 4. Dust removal cylinder; 4a. First cylinder; 4b. Second cylinder; 5. First mesh;

[0044] 6. Boiling chamber; 7. Dust removal box; 7a. First box wall; 7b. Second box wall; 7c. Third box wall;

[0045] 8. First feed port; 9. First discharge port; 10. First guide plate; 11. Second mesh; 12. First air blowing port; 13. Air suction port; 14. Air blowing and suction module; 14a. Air blowing unit; 14b. Air suction unit; 14c. Filter;

[0046] 15. Buffer bucket; 15a. Third bucket body; 15b. Fourth bucket body;

[0047] 16. Second material guide plate; 17. Third mesh; 18. Second air outlet;

[0048] 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

[0049] The following is combined with Figure 1-3 The present invention is described in further detail.

[0050] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They 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. Therefore, they cannot be understood as limitations on the present invention.

[0051] Example 1: See Figure 1-3 FIG. 1 shows a dust removal device for granular material, which is plastic particles. The dust removal device includes a frame 27, on which are arranged, from top to bottom, a first dust removal unit, a second dust removal unit, and a baler 22. 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. The baler 22 is conventional technology, and its specific structure and principle are not described in detail.

[0052] In this embodiment, combined with Figure 2 As shown, the first dust removal unit includes an upright boiling bucket 1, an adsorption component 2 provided at the upper end of the boiling bucket 1, a feeding component 3 provided at the lower end of the boiling bucket 1, a dust removal cylinder 4 provided 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 to the adsorption component 2, and a boiling cavity 6 is formed between the dust removal cylinder 4 and the boiling bucket 1. The boiling cavity 6 is connected to the feeding component 3.

[0053] 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 pulsed 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 feeding 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.

[0054] When negative pressure blower 2b is activated, adsorption tube 2a intermittently draws air, creating an intermittent negative pressure within boiling hopper 1. Second feed port 3b, under the action of negative pressure adsorption, draws plastic particles into boiling hopper 1. Within boiling chamber 6, the plastic particles spiral upward around dust collector 4 and continuously impact dust collector 4 under the action of the intermittently generated negative pressure adsorption force. During this impact, some impurities (such as burrs, tails, etc.) and dust particles on the plastic particles fall off. These particles are then adsorbed by adsorption tube 2a and discharged through first mesh 5, thereby achieving one-step dust removal for the plastic particles. In this way, the tumbling and impact of the granular material within boiling chamber 6 simulates the impact conditions of subsequent processes and removes the dust generated by the impact, preventing the granular material from generating new dust in subsequent processes and effectively improving dust removal quality.

[0055] 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 body 4b are respectively located in the first bucket body 1a and the second bucket body 1b.

[0056] 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 1b, and between the conical outer wall of the first cylinder 4a and the cylindrical inner wall of the first bucket 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.

[0057] In this embodiment, a baffle plate 3d is provided at the lower end of the feed pipe 3a. This baffle plate 3d has a hinged portion hinged to the feed pipe 3a. A gravity block 3e, in the form of a gravity ball, is connected to the end of the hinged portion remote from the baffle plate 3d. The gravity of the gravity ball and the suction of the negative pressure blower 2b allow the baffle plate 3d to continuously block the second discharge port 3c, effectively enhancing its blocking effectiveness. After the negative pressure blower 2b is turned off, the weight of the continuously falling plastic particles gradually exceeds that of the gravity ball, causing the baffle plate 3d to open, enabling unloading.

[0058] In this embodiment, the first dust removal unit also includes an upright buffer hopper 15 positioned below the boiling hopper 1. The lower end of the feed pipe 3a is connected to the buffer hopper 15. The buffer hopper 15 comprises a third hopper body 15a and a fourth hopper body 15b, arranged vertically and coaxially connected. The diameter of the fourth hopper body 15b gradually decreases as it moves away from the third hopper body 15a. After being discharged from the feed pipe 3a, the granular material enters the buffer hopper 15 and is buffered by the gradually decreasing diameter of the fourth hopper body 15b. This prevents excessive granular material from simultaneously entering the dust removal box 7 and affecting the dust removal efficiency of the second dust removal unit.

[0059] 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 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 guide plate 10, and the air 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 air suction port 13.

[0060] 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 removal module 21. The static removal module 21 is an electrostatic ring in the prior art, and 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. It 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, which 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.

[0061] 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. The blown wind blows up the plastic particles on the first guide plate 10 through the second mesh 11. The plastic particles tumble on the first guide plate 10 under the action of the blowing. The remaining impurities and dust generated by the collision 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 are discharged through the first discharge pipe 24 after the dust removal is completed, the residual static electricity on them is completely removed to prevent residual dust from being adsorbed on the plastic particles by static electricity.

[0062] In this embodiment, the second dust removal unit also includes a second guide plate 16 arranged in the dust removal box 7 and below the first guide plate 10, and a plurality of third mesh holes 17 opened on the second guide plate 16. The second 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 guide plate 10. A second blowing port 18 is opened on the box wall of the dust removal box 7. The second blowing port 18 is located on the lower side of the second guide plate 16 and is connected to the blowing and suction module 14.

[0063] After the plastic particles reach the end of the first guide plate 10, they fall onto the second guide plate 16 and move downward along the inclined surface of the second guide plate 16. As 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, blowing the plastic particles on the second guide plate 16 up. Under the action of the blowing air, the plastic particles tumble on the second guide plate 16. During the tumbling process, impurities and dust remaining on the plastic particles are completely precipitated, and the precipitated impurities and dust are sucked out by the suction port 13. In this way, the cooperation between the second guide plate 16 and the first guide plate 10 can extend the movement path of the granular material and improve the dust removal effect. At the same time, the angled arrangement of the first guide plate 10 and the second guide plate 16 can change the movement direction and tumbling posture of the granular material, effectively eliminating dust removal blind spots and improving dust removal quality.

[0064] In this embodiment, the head end of the first guide plate 10 is located directly below the first feed port 8, and the tail end of the second guide plate 16 is located directly above the first discharge port 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.

[0065] The first guide plate 10 slopes downward from the first wall 7a to the second wall 7b. One end of the first guide plate 10 is connected to the first wall 7a, and the other end is connected to a first fixing plate 19. The first guide plate 10 and the first fixing plate 19 are each connected to the two third walls 7c on either side. The first fixing plate 19 comprises a vertically disposed first plate 19a and a second plate 19b connected to the lower end of the first plate 19a. The second plate 19b slopes downward from the second wall 7b to the first wall 7a, and its distal end is connected to the first wall 7a. This prevents the first guide plate 10 from deflecting during dust removal, which could affect dust removal effectiveness. Furthermore, the first wall 7a, the first guide plate 10, the first fixing plate 19, and the two third walls 7c enclose a first blowing chamber 25. The first blowing port 12 is formed in the wall of the first blowing chamber 25. When the first blowing port 12 blows air outward, the air blown outward is prevented from escaping, thereby improving dust removal effectiveness.

[0066] The second guide plate 16 is tilted downward from the second box wall 7b to the first box wall 7a. One end of the second guide plate 16 is connected to the second box wall 7b, and the other end is connected to a second fixing plate 20. The second fixing plate 20 extends vertically and its lower end is connected to the bottom wall of the dust removal box 7. The second guide plate 16 and the second fixing plate 20 are connected to the two third box walls 7c on either side. This prevents the second guide plate 16 from deflecting during dust removal, which could affect its dust removal efficiency. Furthermore, 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 form a second blowing chamber 26. The second blowing port 18 is formed in the wall of the second blowing chamber 26. When the second blowing port 18 blows air outward, the air blown out will not escape, thereby improving the dust removal efficiency.

[0067] Example 2: This example discloses a dust removal process for granular materials. The dust removal process is based on the dust removal device in Example 1 and includes the following steps:

[0068] Step 1, turning on the adsorption component 2, the adsorption component 2 continuously absorbs the granular material into the boiling bucket 1 and adsorbs the granular material entering the boiling bucket 1 upward;

[0069] Step 2: The granular material moves upward in a circumferential spiral around the dust collector 4 and continuously impacts the dust collector 4. Part of the impurities and dust on the granular material fall off after the impact, and the adsorption component 2 sucks the fallen impurities and dust out through the first mesh 5;

[0070] Step 3: close the adsorption assembly 2, and the granular material falls downward and enters the dust removal box 7 through the first feed port 8, and the static electricity is removed during the entry process;

[0071] 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 11 and the third mesh 17. The granular materials roll 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. The suction port 13 sucks out the escaped impurities and dust, and the granular materials that have completed dust removal are discharged through the first discharge port 9.

[0072] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection 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 scope of protection of the present invention.

Claims

1. A dust removal device for granular materials, 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 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 adsorption component (2) can be opened and closed intermittently, the dust removal cylinder (4) is connected to the adsorption component (2), a boiling chamber (6) is formed between the dust removal cylinder (4) and the boiling bucket (1), and the boiling chamber (6) is connected to the feeding component (3); 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), the diameter of the first cylinder (4a) gradually decreases in the direction approaching the second cylinder (4b), the boiling bucket (1) comprises a first bucket (1a) and a second bucket (1b) arranged up and down and coaxially connected, the diameter of the second bucket (1b) gradually decreases in the direction away from the first bucket (1a), the first cylinder (4a) is accommodated in the first bucket (1a), and the two ends of the second cylinder (4b) are respectively located in the first bucket (1a) and the second bucket (1b); 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 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 along the 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 feeding assembly (3) comprises a feeding pipe (3a) extending in a vertical direction, a second feeding port (3b) provided on the side of the feeding pipe (3a), and a second feeding port (3c) provided on the lower end of the feeding pipe (3a); the upper end of the feeding 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 hinge portion hinged to the feeding pipe (3a), and the end of the hinge portion away from the baffle plate (3d) is connected to a gravity block (3e).

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

4. 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) 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), and a second air blowing port (18) is opened on the box wall of the dust removal box (7), and the second air 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).

5. A dust removal device for granular materials according to claim 4, 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).

6. A dust removal device for granular materials according to claim 4, characterized in that: The blowing and suction module (14) comprises a blowing part (14a) and an air suction part (14b); the blowing part (14a) is connected to the first blowing port (12) and the second blowing port (18); the air suction part (14b) is connected to the air suction port (13); and a filter (14c) is provided between the blowing part (14a) and the air suction part (14b).

7. 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).

8. A dust removal process for granular materials, characterized in that: The dust removal process is based on the dust removal device according to any one of claims 1 to 7, 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) upward; 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). Part of the impurities and dust on the granular material falls off after the impact, and the adsorption component (2) sucks the fallen impurities and dust out 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 (11), and the granular material rolls on the first guide plate (10), and impurities and dust adsorbed on the granular material escape during the tumbling process, and the suction port (13) sucks out the escaped impurities and dust, and the granular material after dust removal is discharged through the first discharge port (9).

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