A multi-stage screening device for granulating waste residues

Abstract

The present application relates to the technical fields of superfine granulated slag screening, in particular to a waste slag granulation multi-stage screening device, which comprises a pneumatic driving mechanism and a storage bin, the storage bin is provided with a material conveying cylinder, the upper end of the material conveying cylinder is provided with a feeding pipeline, the bottom of the feeding pipeline is provided with a supporting base; the feeding pipeline is provided with an arc-shaped screen mesh pipe and a material storage box, the outer side of the material storage box is fixedly provided with a discharge pipe, the waste slag is lifted by injecting high-speed airflow into the material conveying cylinder through the pneumatic driving mechanism, the superfine slag falls naturally after entering the feeding pipeline, the falling slag enters the arc-shaped screen mesh pipe, the slag particles roll on the inner wall of the arc-shaped screen mesh pipe under the action of the airflow, the particles meeting the standard enter the material storage box and are discharged through the discharge pipe, and the coarse particles flow back to the feeding pipeline for next-stage screening, which not only can reduce the probability of mesh blockage, but also can improve the classification speed, thereby greatly improving the efficiency of slag granulation screening.

Description

Technical Field

[0001] This invention relates to a multi-stage screening device, and more particularly to a multi-stage screening device for granulating waste slag, belonging to the field of ultrafine granulation slag screening technology. Background Technology

[0002] Ultrafine granulated slag, also known as ultrafine slag powder, refers to granulated blast furnace slag, which is processed into powder through specific treatment. Ultrafine granulated slag powder is a powder that has been dried and ground to achieve a considerable fineness and meets the corresponding activity index. It has characteristics such as high activity, high fineness, and high uniformity, which can significantly improve the strength and durability of concrete and shorten the hardening time of concrete. As an emerging building material, ultrafine granulated slag has broad application prospects and market demand. Screening of ultrafine granulated slag is an important step in the processing of ultrafine slag powder. Its goal is to separate the slag powder according to different particle sizes to meet the fineness requirements of different fields. Existing multi-stage screening devices usually use vibrating screens for grading, but for powdery slag, the screen is very easy to clog.

[0003] For example, Chinese patent document CN219400585U discloses a multi-stage granulation screening device for waste residue. Ultrafine slag enters the first screen cylinder within the first screening box 1 through the feed hopper 2. Power is supplied to the first motor 33 on the top feed pipe 32 of the first screen cylinder and to the second motor 36 on the bottom discharge pipe 35 of the first screen cylinder. The second motor 36 drives the discharge pipe 35 to rotate around the second bearing 37, and the first motor 33 drives the feed pipe 32 to rotate around the first bearing 34, thereby rotating the entire screen cylinder 3. This rotation of the screen cylinder 3 screens the ultrafine slag. The screened ultrafine slag is then conveyed through the discharge chute 5 to the conveying pipe 6 for discharge. When no ultrafine slag is fed into feed pipe 6, it indicates that the ultrafine slag particles of that size have been screened. Then, the power to the solenoid valve 39 on the connecting pipe 38 at the top of the second screen cylinder is turned on, so that the unscreened ultrafine slag is transported into the second screen cylinder under the action of gravity. The second screen cylinder has the same structure as the first screen cylinder, but the diameter of the screen holes 31 on the second screen cylinder is larger than that on the first screen cylinder. The rotation of the second screen cylinder is used to screen the remaining ultrafine slag again. Then, the ultrafine slag is screened again through the third and fourth screen cylinders. Finally, the ultrafine slag is discharged through the bottom of the fourth screen cylinder, achieving a high-efficiency and fast screening effect. Each screen cylinder can work simultaneously to achieve high-efficiency screening.

[0004] Based on the search of the aforementioned patents and the findings of existing equipment, it is found that when the aforementioned equipment is used, the continuous screening method is not convenient for feeding the filter residue in the middle layer. The lower the filter residue is, the smaller its particle size becomes, and the easier it is to clog the screen holes. Furthermore, during the rotation of the screen cylinder, the filter residue may generate centrifugal force and accumulate around the screen, which will not only put a load on the screen cylinder but may also reduce the screening efficiency.

[0005] Therefore, it is urgent to improve the multi-stage granulation screening device for waste residue in order to solve the above-mentioned problems. Summary of the Invention

[0006] The purpose of this invention is to provide a multi-stage granulation and screening device for waste residue. A pneumatic drive mechanism injects high-speed airflow into the conveying cylinder, causing the slag to rise. Ultrafine slag enters the feeding pipe and falls naturally, entering an arc-shaped screen tube during its descent. The slag particles roll on the inner wall of the arc-shaped screen tube under the action of the airflow. Particles that meet the standards enter the material collection box and are discharged through the discharge pipe. Coarse particles flow back into the feeding pipe for the next stage of screening. This not only reduces the probability of mesh clogging but also increases the grading speed, thereby greatly improving the efficiency of slag granulation and screening.

[0007] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0008] A multi-stage granulation and screening device for waste residue includes a pneumatic drive mechanism and a storage silo. A conveying cylinder is fixedly installed on one side of the storage silo corresponding to the pneumatic drive mechanism. The output end of the pneumatic drive mechanism is connected to the interior of the conveying cylinder. A feeding pipe is fixedly installed at the upper end of the conveying cylinder. The feeding pipe extends to one side of the pneumatic drive mechanism and the storage silo. A support base is fixedly installed at the bottom of the end of the feeding pipe away from the conveying cylinder. The bottom side of the support base is fixedly installed on the ground by bolts.

[0009] Several evenly distributed arc-shaped screen tubes are fixedly installed on the feeding pipe. Both ends of the arc-shaped screen tubes extend into the feeding pipe. Several material collection boxes corresponding to the arc-shaped screen tubes are fixedly installed on the outside of the feeding pipe. The arc-shaped screen tubes are located inside the material collection boxes. The inside of the feeding pipe is connected to the inside of the material collection boxes through the arc-shaped screen tubes. A discharge pipe is fixedly installed on the outside of the material collection boxes. The inside of the material collection boxes is connected to the outside through the discharge pipe.

[0010] Preferably, the arc-shaped screen tube has a plurality of evenly distributed fine screen holes, and a group of the arc-shaped screen tubes corresponds to a material storage box, and the diameter of the mesh opening of the fine screen holes on the plurality of arc-shaped screen tubes increases sequentially from top to bottom.

[0011] Preferably, a plurality of the material storage boxes are mounted in pairs on the outer wall of the feeding pipe, and a sealed bearing is fixedly connected between two of the material storage boxes. The plurality of material storage boxes are rotatably mounted on the outer wall of the feeding pipe through the sealed bearing.

[0012] Preferably, the discharge pipes located on the same group of material storage boxes are internally interconnected, and a cross-shaped connecting pipe is fixedly installed at the node of the two discharge pipes, with a reversing valve rotatably installed inside the cross-shaped connecting pipe.

[0013] Preferably, the pneumatic drive mechanism includes a servo motor and a blower fixedly installed on one side of the servo motor. The output end of the blower is connected to the inside of the feed cylinder. A coupling is fixedly installed on the same side of the servo motor and the blower. The servo motor drives the blower to rotate through the coupling.

[0014] Preferably, the output end of the servo motor passes through the coupling and extends to the outside of the coupling, and a screw is fixedly connected to the output end of the servo motor. The screw is rotatably disposed on the side of the coupling away from the servo motor.

[0015] Preferably, the pneumatic drive mechanism has a vertical shaft rotatably mounted on the side away from the coupling, a gear is fixedly mounted on the vertical shaft, the gear meshes with the screw, and a auger lifting rod is fixedly connected to the upper end of the vertical shaft, the auger lifting rod extending into the interior of the conveying cylinder.

[0016] Preferably, a bottom discharge pipe is fixedly provided at the bottom of the storage bin corresponding to the bottom of the conveying cylinder. The inside of the storage bin is connected to the inside of the conveying cylinder through the bottom discharge pipe. The bottom discharge pipe corresponds to the bottom end of the auger lifting rod, and the output end of the blower corresponds to the upper end of the auger lifting rod.

[0017] Preferably, the inside of the feeding pipe is fixedly provided with several evenly distributed C-shaped collars, and the outlet of the arc-shaped screen pipe inside the feeding pipe is located between two of the C-shaped collars, and an impeller is rotatably provided inside the C-shaped collar.

[0018] Preferably, an impeller is rotatably disposed inside the C-shaped collar, and a plurality of evenly distributed steel balls are rotatably disposed between the outer side wall of the impeller and the inner side wall of the C-shaped collar, and the impeller is rotatably disposed inside the C-shaped collar via the steel balls.

[0019] This invention has at least the following beneficial effects:

[0020] 1. This invention uses a pneumatic drive mechanism to inject high-speed airflow into the conveying cylinder, causing the slag to rise. The ultrafine slag enters the feeding pipe and falls naturally. During the fall, it enters the arc-shaped screen tube. The slag particles roll on the inner wall of the arc-shaped screen tube under the action of airflow. Particles that meet the standards enter the material collection box and are discharged through the discharge pipe. Coarse particles will flow back into the feeding pipe for the next stage of screening. This not only reduces the probability of mesh clogging but also increases the grading speed, thereby greatly improving the efficiency of slag granulation screening.

[0021] 2. When the slag material passes through the arc-shaped screen tube, it is carried by the airflow and comes into contact with the inner wall of the arc-shaped screen tube. Therefore, the fine particles will enter the material collection box through the fine screen holes. At this time, the slag particles will still be carried by the airflow and generate centrifugal force to rotate along the inner wall of the material collection box and be discharged at the outlet of the discharge pipe. The special distribution of the fine screen holes can make the slag separate from the finest particles first, and the large particles fall into the bottom of the feeding pipe, which can greatly reduce the probability of slag accumulation. In combination with the high-speed airflow output by the pneumatic drive mechanism and the gravity of the filter residue itself, the load on the screening device is reduced.

[0022] 3. The cross-shaped connecting pipe of this invention allows the slag from two material collection boxes to be discharged together. The reversing valve is used to separate the upper and lower discharge pipes. The particle size of the discharged filter residue can be adjusted according to the required standard. When the particle size requirement is fine, the upper and lower discharge pipes can be separated by the reversing valve. Moving the discharge pipe can also make the material collection box rotate through the sealed bearing, which is convenient for workers to collect. This greatly improves the applicability of the multi-stage granulation screening device for waste residue.

[0023] 4. During the rotation of the blower driven by the servo motor through the coupling, the screw also rotates and the vertical shaft rotates through the gear drive, thereby causing the auger lifting rod to rotate inside the conveying cylinder. The inside of the storage silo is connected to the inside of the conveying cylinder through the bottom discharge pipe, allowing the filter residue to flow naturally into the conveying cylinder. The auger lifting rod then conveys the material to the output end of the blower. At this time, the auger lifting rod can also prevent the high-speed airflow from blowing back and causing the filter residue to flow back, thereby improving the continuity of filter residue grading. Only filling material needs to be added to the inside of the storage silo.

[0024] 5. When the high-speed airflow injected by the blower of this invention passes through the impeller, the impeller rotates inside the C-shaped collar under the action of the wind force via steel balls. When the filter material passes through the impeller, the accumulated ultrafine filter material is broken up and thrown towards the inner wall of the feeding pipe as the impeller rotates, making the filter material enter the arc-shaped screen pipe more smoothly. In addition, the impeller can also buffer and divert the airflow, making the airflow speed more uniform and preventing the filter material from being blown directly out of the feeding pipe.

[0025] 6. When the filter residue particles separated by the feeding pipe are of uneven size, it indicates that the fine screen holes of the arc-shaped screen tube are blocked. The discharge port at the bottom of the feeding pipe can be blocked, and a high-speed airflow can be used to flush the fine screen holes of the arc-shaped screen tube for easy cleaning. Attached Figure Description

[0026] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0027] Figure 1 This is a three-dimensional structural schematic diagram provided for the present invention;

[0028] Figure 2 The front elevation view provided for this invention;

[0029] Figure 3 This is a cross-sectional elevation view of the feed cylinder provided by the present invention;

[0030] Figure 4 This is a cross-sectional elevation view of the feeding pipe provided by the present invention;

[0031] Figure 5 This is an exploded view of the arc-shaped screen tube and material storage box provided by the present invention;

[0032] Figure 6 A schematic diagram of the pneumatic drive mechanism provided by the present invention;

[0033] Figure 7 This is a schematic diagram of the impeller structure provided by the present invention;

[0034] Figure 8 Provided by the present invention Figure 7 Enlarged diagram of point A in the middle.

[0035] In the diagram, 1. Pneumatic drive mechanism; 2. Storage silo; 21. Bottom discharge pipe; 3. Conveying cylinder; 4. Feeding pipe; 5. Support base; 6. Arc-shaped screen pipe; 61. Fine screen hole; 7. Material collection box; 71. Sealed bearing; 8. Discharge pipe; 9. Cross connecting pipe; 10. Reversing valve; 11. Servo motor; 12. Blower; 13. Coupling; 14. Screw; 15. Vertical shaft; 16. Gear; 17. Auger lifting rod; 18. C-shaped collar; 19. Impeller; 20. Steel ball; 21. Bottom discharge pipe. Detailed Implementation

[0036] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0037] like Figure 1 - Figure 8 As shown, the multi-stage granulation screening device for waste residue provided in this embodiment includes a pneumatic drive mechanism 1 and a storage bin 2. A conveying cylinder 3 is fixedly installed on one side of the storage bin 2 corresponding to the pneumatic drive mechanism 1. The output end of the pneumatic drive mechanism 1 is connected to the inside of the conveying cylinder 3. A feeding pipe 4 is fixedly installed on the upper end of the conveying cylinder 3. The feeding pipe 4 extends to one side of the pneumatic drive mechanism 1 and the storage bin 2. The feeding pipe 4 is used to guide the airflow and the material transmission direction. A support base 5 is fixedly installed at the bottom of the end of the feeding pipe 4 away from the conveying cylinder 3. The bottom side of the support base 5 is fixedly installed on the ground by bolts. The support base 5 is used to support the feeding pipe 4.

[0038] Several evenly distributed arc-shaped screen tubes 6 are fixedly installed on the feeding pipe 4. Both ends of the arc-shaped screen tubes 6 extend into the inside of the feeding pipe 4. Several material collection boxes 7 corresponding to the arc-shaped screen tubes 6 are fixedly installed on the outside of the feeding pipe 4. The arc-shaped screen tubes 6 are located inside the material collection boxes 7. The inside of the feeding pipe 4 is connected to the inside of the material collection boxes 7 through the arc-shaped screen tubes 6. A discharge pipe 8 is fixedly installed on the outside of the material collection boxes 7. The inside of the material collection boxes 7 is connected to the outside through the discharge pipe 8.

[0039] In this process, the ultrafine slag in the storage bin 2 flows naturally from the bottom into the conveying cylinder 3. The pneumatic drive mechanism 1 injects high-speed airflow into the conveying cylinder 3, causing the slag to rise. After entering the feeding pipe 4, the ultrafine slag falls naturally. During the fall, it enters several arc-shaped screen pipes 6. The slag particles roll on the inner wall of the arc-shaped screen pipes 6 under the action of airflow. Particles that meet the standards enter the material collection box 7 and are discharged through the discharge pipe 8. Coarse particles will flow back into the feeding pipe 4 for the next stage of screening. This not only reduces the probability of mesh clogging but also increases the grading speed, thereby greatly improving the efficiency of slag granulation screening.

[0040] Furthermore, such as Figure 1 - Figure 8 As shown, the arc-shaped screen tube 6 has several evenly distributed fine screen holes 61. A set of arc-shaped screen tubes 6 corresponds to a material collection box 7. The diameter of the fine screen holes 61 on the arc-shaped screen tubes 6 increases from top to bottom, so that the slag is separated from the smallest particles from top to bottom. Several material collection boxes 7 are set in pairs on the outer wall of the feeding pipe 4. A sealed bearing 71 is fixedly connected between two material collection boxes 7. The sealed bearing 71 can be used to adjust the discharge direction of the discharge pipe 8.

[0041] When the slag material passes through the inside of the arc-shaped screen tube 6, it is carried by the airflow and comes into contact with the inner wall of the arc-shaped screen tube 6. Therefore, the fine particles will enter the material collection box 7 through the fine screen holes 61. At this time, the slag particles will still be carried by the airflow and generate centrifugal force to rotate along the inner wall of the material collection box 7 and be discharged at the outlet of the discharge pipe 8. The special distribution of the fine screen holes 61 can make the slag separate from the finest particles first, and the large particles fall into the bottom of the feeding pipe 4, which can greatly reduce the probability of slag accumulation. In combination with the high-speed airflow output by the pneumatic drive mechanism 1 and the gravity of the filter residue itself, the load of the screening device is reduced.

[0042] At the same time, such as Figure 1 - Figure 8 As shown, several material storage boxes 7 are rotatably mounted on the outer wall of the feeding pipe 4 via sealed bearings 71. The discharge pipes 8 located on the same group of material storage boxes 7 are internally interconnected. A cross-connecting pipe 9 is fixedly installed at the node of two discharge pipes 8. The cross-connecting pipe 9 is used to connect the upper and lower discharge pipes 8. A reversing valve 10 is rotatably mounted inside the cross-connecting pipe 9. The reversing valve 10 is used to separate the upper and lower discharge pipes 8.

[0043] The cross-shaped connecting pipe 9 allows the slag from the two material collection boxes 7 to be discharged together. The reversing valve 10 is used to separate the upper and lower discharge pipes 8. The particle size of the filter residue discharged can be adjusted according to the standard specified by the requirements. When the particle size requirement is fine, the upper and lower discharge pipes 8 can be separated by the reversing valve 10. Moving the discharge pipe 8 can also make the material collection box 7 rotate through the sealed bearing 71, which is convenient for the staff to collect. This greatly improves the applicability of the multi-stage granulation screening device for waste residue.

[0044] Furthermore, such as Figure 1 - Figure 8As shown, the pneumatic drive mechanism 1 includes a servo motor 11 and a blower 12 fixedly mounted on one side of the servo motor 11. The output end of the blower 12 is connected to the inside of the conveying cylinder 3. A coupling 13 is fixedly mounted on the same side of the servo motor 11 and the blower 12. The servo motor 11 drives the blower 12 to rotate through the coupling 13. The output end of the servo motor 11 passes through the coupling 13 and extends to the outside of the coupling 13. A screw 14 is fixedly connected to the output end of the servo motor 11. The screw 14 is rotatably positioned on the side of the coupling 13 away from the servo motor 11. A vertical shaft 15 is rotatably mounted on the side away from the coupling 13. A gear 16 is fixedly mounted on the vertical shaft 15 and meshes with the screw 14. A auger lifting rod 17 is fixedly connected to the upper end of the vertical shaft 15 and extends into the inside of the conveying cylinder 3. A bottom discharge pipe 21 is fixedly mounted on the bottom of the storage bin 2 corresponding to the side of the conveying cylinder 3. The inside of the storage bin 2 is connected to the inside of the conveying cylinder 3 through the bottom discharge pipe 21. The bottom discharge pipe 21 corresponds to the bottom end of the auger lifting rod 17. The output end of the blower 12 corresponds to the upper end of the auger lifting rod 17.

[0045] During the process of the servo motor 11 driving the blower 12 to rotate through the coupling 13, the screw 14 also rotates and drives the vertical shaft 15 to rotate through the gear 16, thereby causing the auger lifting rod 17 to rotate inside the conveying cylinder 3. The inside of the storage bin 2 is connected to the inside of the conveying cylinder 3 through the bottom discharge pipe 21, allowing the filter residue to flow naturally into the conveying cylinder 3. The auger lifting rod 17 then conveys the material to the output end of the blower 12. At this time, the auger lifting rod 17 can also prevent the high-speed airflow from blowing back and causing the filter residue to flow back, thereby improving the continuity of the filter residue grading. Only filling material needs to be added to the inside of the storage bin 2.

[0046] To address the issue that ultrafine slag might be directly conveyed out of the feeding pipe 4 via airflow;

[0047] The inside of the feeding pipe 4 is fixedly equipped with several evenly distributed C-shaped collars 18. The outlet of the arc-shaped screen pipe 6 located inside the feeding pipe 4 is located between two C-shaped collars 18. An impeller 19 is rotatably installed inside the C-shaped collar 18. The impeller 19 can disperse the filter residue material on the one hand, and throw the filter residue material to the periphery on the other hand. The impeller 19 is rotatably installed inside the C-shaped collar 18. Several evenly distributed steel balls 20 are rotatably installed between the outer wall of the impeller 19 and the inner wall of the C-shaped collar 18. The impeller 19 is rotatably installed inside the C-shaped collar 18 through the steel balls 20.

[0048] When the high-speed airflow injected by the blower 12 passes through the impeller 19, the impeller 19 rotates inside the C-shaped collar 18 under the action of the wind force via the steel balls 20. When the filter material passes through the impeller 19, the accumulated ultrafine filter material is broken up. At the same time, as the impeller 19 rotates, it is thrown towards the inner wall of the feeding pipe 4, making the filter material enter the arc-shaped screen tube 6 more smoothly. The impeller 19 can also buffer and divert the airflow, making the airflow speed more uniform and preventing the filter material from being blown directly out of the feeding pipe 4. When the particles separated by the feeding pipe 4 are of uneven size, it indicates that the fine screen holes 61 of the arc-shaped screen tube 6 are blocked. The discharge port at the bottom of the feeding pipe 4 can be blocked, and the high-speed airflow can be used to flush the fine screen holes 61 of the arc-shaped screen tube 6 for easy cleaning.

[0049] like Figure 1 - Figure 8 As shown, the principle of the multi-stage granulation and screening device for waste residue provided in this embodiment is as follows:

[0050] In use, ultrafine slag is injected into the storage silo 2. The ultrafine slag flows naturally from the bottom discharge pipe 21 on the bottom side of the storage silo 2 into the conveying cylinder 3 below the auger lifting rod 17. As the servo motor 11 drives the blower 12 to rotate through the coupling 13, the screw 14 also rotates and drives the vertical shaft 15 to rotate through the gear 16, thereby causing the auger lifting rod 17 to rotate inside the conveying cylinder 3. The auger lifting rod 17 then conveys the material to the output end of the blower 12, and the slag is lifted by the high-speed airflow. After entering the feeding pipe 4, the ultrafine slag falls naturally. The impeller 19 rotates inside the C-shaped collar 18 under the action of wind force through the steel balls 20. When the filter material passes through the impeller 19, the accumulated ultrafine slag... The filter residue is broken up and thrown against the inner wall of the feeding pipe 4 as the impeller 19 rotates, making it easier for the filter residue to enter the arc-shaped screen pipe 6. The impeller 19 can also buffer and divert the airflow, making the airflow speed more uniform. During the fall of the ultrafine slag, it enters several arc-shaped screen pipes 6. The slag particles roll on the inner wall of the arc-shaped screen pipe 6 under the action of the airflow. Particles that meet the standards enter the material collection box 7 and are discharged through the discharge pipe 8. Coarse particles will flow back into the feeding pipe 4 for the next stage of screening. When the particle size requirement is fine, the upper and lower discharge pipes 8 can be separated by the reversing valve 10. Moving the discharge pipe 8 can also make the material collection box 7 rotate through the sealed bearing 71, which is convenient for the staff to collect.

[0051] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0052] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes that element.

[0053] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A multi-stage granulation and screening device for waste residue, comprising a pneumatic drive mechanism (1) and a storage silo (2), characterized in that: The storage bin (2) is fixedly provided with a conveying cylinder (3) on one side corresponding to the pneumatic drive mechanism (1). The output end of the pneumatic drive mechanism (1) is connected to the inside of the conveying cylinder (3). A feeding pipe (4) is fixedly installed on the upper end of the conveying cylinder (3). The feeding pipe (4) extends to one side of the pneumatic drive mechanism (1) and the storage bin (2). A support base (5) is fixedly installed at the bottom of the end of the feeding pipe (4) away from the conveying cylinder (3). The bottom side of the support base (5) is fixedly installed on the ground by bolts. Several evenly distributed arc-shaped screen tubes (6) are fixedly installed on the feeding pipe (4). Both ends of the arc-shaped screen tubes (6) extend into the inside of the feeding pipe (4). Several material collection boxes (7) corresponding to the arc-shaped screen tubes (6) are fixedly installed on the outside of the feeding pipe (4). The arc-shaped screen tubes (6) are located inside the material collection boxes (7). The inside of the feeding pipe (4) is connected to the inside of the material collection box (7) through the arc-shaped screen tubes (6). A discharge pipe (8) is fixedly installed on the outside of the material collection box (7). The inside of the material collection box (7) is connected to the outside through the discharge pipe (8). The arc-shaped screen tube (6) has a number of evenly distributed fine screen holes (61). A group of arc-shaped screen tubes (6) corresponds to a material storage box (7). The mesh diameter of the fine screen holes (61) on the arc-shaped screen tubes (6) increases from top to bottom. Several material storage boxes (7) are mounted on the outer wall of the feeding pipe (4) in pairs. A sealed bearing (71) is fixedly connected between two material storage boxes (7). Several material storage boxes (7) are rotatably mounted on the outer wall of the feeding pipe (4) through the sealed bearing (71). The discharge pipes (8) located on the same group of material storage boxes (7) are interconnected internally, and a cross-shaped connecting pipe (9) is fixedly installed at the node of the two discharge pipes (8). A reversing valve (10) is rotatably installed inside the cross-shaped connecting pipe (9). The inside of the feeding pipe (4) is fixedly provided with several uniformly distributed C-shaped collars (18). The outlet of the arc-shaped screen pipe (6) located inside the feeding pipe (4) is located between two of the C-shaped collars (18). The inside of the C-shaped collar (18) is rotatably provided with an impeller (19). An impeller (19) is rotatably arranged inside the C-shaped collar (18). A number of evenly distributed steel balls (20) are rotatably arranged between the outer wall of the impeller (19) and the inner wall of the C-shaped collar (18). The impeller (19) is rotatably arranged inside the C-shaped collar (18) through the steel balls (20).

2. The multi-stage granulation and screening device for waste residue according to claim 1, characterized in that: The pneumatic drive mechanism (1) includes a servo motor (11) and a blower (12) fixedly installed on one side of the servo motor (11). The output end of the blower (12) is connected to the inside of the feed cylinder (3). A coupling (13) is fixedly installed on the same side of the servo motor (11) and the blower (12). The servo motor (11) drives the blower (12) to rotate through the coupling (13).

3. The multi-stage granulation and screening device for waste residue according to claim 2, characterized in that: The output end of the servo motor (11) passes through the coupling (13) and extends to the outside of the coupling (13). The output end of the servo motor (11) is fixedly connected to a screw (14), which is rotatably disposed on the side of the coupling (13) away from the servo motor (11).

4. The multi-stage granulation and screening device for waste residue according to claim 3, characterized in that: The pneumatic drive mechanism (1) has a vertical shaft (15) rotatably mounted on the side away from the coupling (13). A gear (16) is fixedly mounted on the vertical shaft (15). The gear (16) meshes with the screw (14). A auger lifting rod (17) is fixedly connected to the upper end of the vertical shaft (15). The auger lifting rod (17) extends into the interior of the conveying cylinder (3).

5. The multi-stage granulation and screening device for waste residue according to claim 4, characterized in that: The storage bin (2) is fixedly provided with a bottom discharge pipe (21) on the bottom side of the conveying cylinder (3). The interior of the storage bin (2) is connected to the interior of the conveying cylinder (3) through the bottom discharge pipe (21). The bottom discharge pipe (21) corresponds to the bottom end of the auger lifting rod (17), and the output end of the blower (12) corresponds to the upper end of the auger lifting rod (17).

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