Pulverized coal impurity separator with double spiral screens

Abstract

The invention discloses a pulverized coal impurity separator with double spiral screens, and belongs to the technical field of screening equipment.The pulverized coal impurity separator with the double spiral screens comprises a first-stage material collecting barrel and a second-stage material collecting barrel, a connecting pipe is fixedly connected between the bottom position of the bottom end of the first-stage material collecting barrel and the top position of the bottom end of the second-stage material collecting barrel; a first-stage screen is fixedly connected to the interior of the first-stage material collecting barrel, the interior of the first-stage material collecting barrel is divided into a first-stage screening cavity and a first-stage material collecting cavity through the first-stage screen, first-stage spiral blades can be adopted to be matched with a driving motor and a first-stage spiral transmission shaft, materials can be reversely lifted and scattered, first-stage screening is completed, and the efficiency is improved. And meanwhile, a secondary spiral blade is matched with a driving motor and a secondary spiral transmission shaft to lift residual materials and impurities, the materials are screened again, the whole equipment is simple in structure and convenient and fast to operate, and the effects of continuous use, rapid cleaning and effective removal of fibers and other impurities in powdery substances such as pulverized coal are achieved.

Description

Technical Field

[0001] This invention relates to the field of screening equipment technology, and more specifically, to a double-helix screen coal powder impurity separator. Background Technology

[0002] In coal chemical and other industrial processes, coal powder and other powdery materials are used as raw materials. However, these powdery materials often contain fibrous and other types of impurities, which significantly interfere with subsequent production and disrupt normal operations. The conventional solution is to use equipment such as vibrating screens to remove these impurities. However, because fibers tend to entangle and accumulate on the screen surface, screening capacity decreases, and powdery materials easily clog the mesh. Increasing the screen aperture does not effectively remove these impurities. Furthermore, traditional vibrating screens often separate fibrous materials with a high coal powder content, and the separation process is difficult, resulting in poor overall processing efficiency. Therefore, this paper studies and improves existing structures to provide a double-spiral screen coal powder impurity separator, aiming to achieve greater practical value. Summary of the Invention

[0003] 1. Technical problems to be solved

[0004] To address the problems existing in the prior art, the present invention aims to provide a double-spiral screen coal powder impurity separator. It can use a primary spiral blade in conjunction with a drive motor and a primary spiral drive shaft to reverse lift and disperse the material, completing the primary screening. At the same time, a secondary spiral blade in conjunction with a drive motor and a secondary spiral drive shaft lifts the remaining material and impurities, completing the secondary screening. The entire device has a simple structure and is easy to operate, achieving continuous use, rapid cleaning, and effective removal of fibers and other impurities from coal powder and other powdery materials.

[0005] 2. Technical Solution

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A double-spiral screen coal powder impurity separator includes a primary collection bucket and a secondary collection bucket. A connecting pipe is fixedly connected between the bottom of the primary collection bucket and the top of the secondary collection bucket. A primary screen is fixedly connected inside the primary collection bucket, and the primary collection bucket is divided into a primary screening chamber and a primary collection chamber by the primary screen. A primary spiral drive shaft is rotatably connected to the primary screening chamber via a bearing, and primary spiral blades are fixedly connected to the outer circumference of the primary spiral drive shaft. A secondary screen is fixedly connected inside the secondary collection bucket, and the secondary collection bucket is divided into a secondary screening chamber and a secondary collection chamber by the secondary screen. A secondary spiral drive shaft is rotatably connected to the secondary screening chamber via a bearing, and secondary spiral blades are fixedly connected to the outer circumference of the secondary spiral drive shaft. A drive motor is installed at the top end of both the primary and secondary collection buckets. The top ends of the primary and secondary spiral drive shafts are connected to the output shafts of the corresponding drive motors via couplings.

[0008] Furthermore, the primary screening chamber in the primary collection bucket and the secondary screening chamber in the secondary collection bucket are connected by a connecting pipe.

[0009] Furthermore, a material inlet is installed at the top of the primary collection bucket, and the material inlet is connected to the primary screening chamber. A primary slag discharge port is installed at the bottom of the primary collection bucket, and the primary slag discharge port is connected to the primary screening chamber. A primary material outlet is installed at the bottom of the primary collection bucket, and the primary material outlet is connected to the primary collection chamber.

[0010] Furthermore, a secondary slag discharge port is installed at the top and bottom of the secondary collection hopper, and the secondary slag discharge port is connected to the secondary screening chamber.

[0011] Furthermore, a drain outlet and a secondary material outlet are installed sequentially from bottom to top at the bottom of the secondary collection hopper. The drain outlet is connected to the secondary screening chamber, and the secondary material outlet is connected to the secondary collection chamber.

[0012] Furthermore, the primary and secondary collection buckets have the same structure, both being cylindrical structures, and the primary and secondary screens have the same structure, both being cylindrical mesh structures.

[0013] Furthermore, the primary spiral blade is disposed on the inner side of the primary screen and has a gap between it and the inner wall of the primary screen; the secondary spiral blade is disposed on the inner side of the secondary screen and has a gap between it and the inner wall of the secondary screen.

[0014] 3. Beneficial effects

[0015] Compared with the prior art, the advantages of this invention are:

[0016] This solution employs a primary spiral blade system in conjunction with a drive motor and a primary spiral transmission shaft to reverse-lift and disperse materials. This reverse lifting slows the material's descent along the primary screen, thereby improving the screen's filtration efficiency. Dispersing the material prevents caking and blockage of the primary screen. Simultaneously, a secondary spiral blade system, in conjunction with a drive motor and a secondary spiral transmission shaft, lifts remaining materials and impurities, further dispersing and screening them during this process, further enhancing the screening effect. Finally, unscreenable impurities are discharged through the primary and secondary slag discharge ports and the wastewater discharge port. The entire equipment has a simple structure, is easy to operate, and achieves continuous use, rapid cleaning, and effective removal of fibers and other impurities from powdery materials such as coal dust. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 For the present invention Figure 1 Schematic diagram of the cross-sectional structure at position AA;

[0019] Figure 3 For the present invention Figure 1 Schematic diagram of the cross-sectional structure at the BB position.

[0020] Explanation of the labels in the diagram:

[0021] 1. Primary collection hopper;

[0022] 2. Secondary collection hopper;

[0023] 3. Connecting pipe;

[0024] 4. Primary screen;

[0025] 5. Primary screening chamber;

[0026] 6. Primary collection chamber;

[0027] 7. Primary screw drive shaft;

[0028] 8. First-stage helical blades;

[0029] 9. Secondary screen;

[0030] 10. Secondary screening chamber;

[0031] 11. Secondary collection chamber;

[0032] 12. Two-stage screw drive shaft;

[0033] 13. Secondary helical blades;

[0034] 14. Material import;

[0035] 15. Primary slag discharge port;

[0036] 16. Primary material outlet;

[0037] 17. Secondary slag discharge port;

[0038] 18. Sewage outlet;

[0039] 19. Secondary material export;

[0040] 20. Drive motor. Detailed Implementation

[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0042] Example:

[0043] Please see Figures 1-3 A double-spiral screen coal powder separator includes a primary collection bin 1 and a secondary collection bin 2. A connecting pipe 3 is fixedly connected between the bottom of the primary collection bin 1 and the top of the bottom of the secondary collection bin 2. A primary screen 4 is fixedly connected inside the primary collection bin 1, and the interior of the primary collection bin 1 is divided by the primary screen 4 into a primary screening chamber 5 and a primary collection chamber 6. A primary spiral drive shaft 7 is rotatably connected to the primary screening chamber 5 via bearings. Primary spiral blades 8 are fixedly connected to the outer periphery of the primary spiral drive shaft 7. The secondary collection bin... 2. A secondary screen 9 is fixedly connected inside, and the interior of the secondary collection bucket 2 is divided into a secondary screening chamber 10 and a secondary collection chamber 11 by the secondary screen 9. A secondary screw drive shaft 12 is rotatably connected to the secondary screening chamber 10 through a bearing. A secondary screw blade 13 is fixedly connected to the outer periphery of the secondary screw drive shaft 12. A drive motor 20 is installed at the top end of both the primary collection bucket 1 and the secondary collection bucket 2. The top end of the primary screw drive shaft 7 and the top end of the secondary screw drive shaft 12 are connected to the output shaft of the corresponding drive motor 20 through a coupling.

[0044] See Figure 1 The primary screening chamber 5 in the primary collection bucket 1 and the secondary screening chamber 10 in the secondary collection bucket 2 are connected by a connecting pipe 3. In use, the primary screening chamber 5 and the secondary screening chamber 10 can be connected through the connecting pipe 3, so that the remaining material and impurities that are not separated in the primary screening chamber 5 can enter the secondary screening chamber 10 through the connecting pipe 3 to achieve secondary screening and further improve the screening effect.

[0045] See Figure 1 The primary collection bucket 1 has a material inlet 14 installed at the top, which is connected to the primary screening chamber 5. The primary slag discharge port 15 is installed at the bottom, which is connected to the primary screening chamber 5. The primary material outlet 16 is installed at the bottom, which is connected to the primary collection chamber 6. In use, the material inlet 14 can be used to easily put the material into the primary screening chamber 5. The primary slag discharge port 15 can be used to discharge larger debris with the help of the primary spiral blades 8. Finally, the material outlet 16 can discharge the screened material.

[0046] See Figure 1 The secondary collection bucket 2 is equipped with a secondary slag discharge port 17 at the top and bottom, and the secondary slag discharge port 17 is connected to the secondary screening chamber 10. In use, fibrous and other impurities that cannot pass through the secondary screen 9 can be discharged through the secondary slag discharge port 17.

[0047] See Figure 1 The bottom of the secondary collection hopper 2 is equipped with a drain outlet 18 and a secondary material outlet 19 from bottom to top. The drain outlet 18 is connected to the secondary screening chamber 10, and the secondary material outlet 19 is connected to the secondary collection chamber 11. During use, the material after secondary screening can be discharged through the secondary material outlet 19, while the drain outlet 18 can discharge debris that cannot be lifted. This method makes the overall cleaning work more convenient.

[0048] See Figure 2 and Figure 3 The primary collection bucket 1 and the secondary collection bucket 2 have the same structure and are both cylindrical. The primary screen 4 and the secondary screen 9 have the same structure and are both cylindrical mesh structures.

[0049] See Figure 2 and Figure 3 The first-stage spiral blade 8 is located inside the first-stage screen 4 and has a gap between it and the inner wall of the first-stage screen 4. The second-stage spiral blade 13 is located inside the second-stage screen 9 and has a gap between it and the inner wall of the second-stage screen 9. In use, the gaps ensure that some impurities can be separated while ensuring that the material has a certain degree of passability.

[0050] In use: Coal powder and other materials enter the equipment through material inlet 14. During the falling process, the material gradually passes through the primary screen 4 and enters the primary collection bucket 1, and is then discharged through the primary material outlet 16. The drive motor 20 drives the primary spiral drive shaft 7 to rotate, causing the primary spiral blades 8 to rotate in the opposite direction, creating a reverse thrust on the material, thereby slowing down the material's descent speed. At the same time, the primary spiral blades 8 stir the material, preventing it from caking and clogging the primary screen 4. The primary spiral blades 8 and the primary screen 4 are at a certain distance, ensuring that the material can flow down slowly and along the gaps, preventing material from accumulating at the front. Larger debris is lifted by the primary spiral blades 8 to the primary slag discharge port 15 for discharge. Unseparated remaining material and debris enter the secondary screening chamber 10 through the connecting pipe 3. Then, driven by the drive motor 20 and the secondary spiral drive shaft 12, the secondary spiral blades 13 lift the material upward. During the upward process, the material passes through the secondary screen 9 and enters the secondary collection chamber 11, finally exiting through the secondary material outlet 19. Fibrous and other debris that cannot pass through the secondary screen 9 are lifted to the secondary slag discharge port 17 for discharge. Debris that cannot be lifted is periodically discharged through the bottom drain port 18.

[0051] Finally, it should be noted that in the description of this invention, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0052] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A double-spiral screen coal powder impurity separator, comprising a primary collection bin (1) and a secondary collection bin (2), characterized in that: A connecting pipe (3) is fixedly connected between the bottom of the primary collection bucket (1) and the top of the secondary collection bucket (2). A primary screen (4) is fixedly connected inside the primary collection bucket (1), and the primary collection bucket (1) is divided into a primary screening chamber (5) and a primary collection chamber (6) by the primary screen (4). A primary screw drive shaft (7) is rotatably connected to the primary screening chamber (5) through a bearing. A primary screw drive shaft (8) is fixedly connected to the outer circumference of the primary screw drive shaft (7). A secondary screen (9) is fixedly connected inside the secondary collection bucket (2). The secondary collection bucket (2) is divided into a secondary screening chamber (10) and a secondary collection chamber (11) by a secondary screen (9). A secondary spiral drive shaft (12) is rotatably connected to the secondary screening chamber (10) by a bearing. A secondary spiral blade (13) is fixedly connected to the outer circumference of the secondary spiral drive shaft (12). Both the primary collection bucket (1) and the secondary collection bucket (2) are equipped with drive motors (20). The top end of the primary spiral drive shaft (7) and the top end of the secondary spiral drive shaft (12) are connected to the output shaft of the corresponding drive motor (20) by a coupling.

2. The double-helix screen coal powder impurity separator according to claim 1, characterized in that: The primary screening chamber (5) in the primary collection bucket (1) and the secondary screening chamber (10) in the secondary collection bucket (2) are connected by a connecting pipe (3).

3. The double-helix screen coal powder impurity separator according to claim 1, characterized in that: The top of the primary collection bucket (1) is equipped with a material inlet (14), which is connected to the primary screening chamber (5). The bottom of the primary collection bucket (1) is equipped with a primary slag discharge port (15), which is connected to the primary screening chamber (5). The bottom of the primary collection bucket (1) is equipped with a primary material outlet (16), which is connected to the primary collection chamber (6).

4. The double-helix screen coal powder impurity separator according to claim 1, characterized in that: The secondary collection bucket (2) is equipped with a secondary slag discharge port (17) at the top and bottom, and the secondary slag discharge port (17) is connected to the secondary screening chamber (10).

5. A double-spiral screen coal powder impurity separator according to claim 1, characterized in that: The bottom of the secondary collection bucket (2) is equipped with a drain outlet (18) and a secondary material outlet (19) from bottom to top. The drain outlet (18) is connected to the secondary screening chamber (10), and the secondary material outlet (19) is connected to the secondary collection chamber (11).

6. The double-helix screen coal powder impurity separator according to claim 1, characterized in that: The primary collection bucket (1) and the secondary collection bucket (2) have the same structure and are both cylindrical. The primary screen (4) and the secondary screen (9) have the same structure and are both cylindrical mesh structures.

7. A double-helix screen coal powder impurity separator according to claim 1, characterized in that: The first-stage spiral blade (8) is disposed inside the first-stage screen (4) and has a gap between it and the inner wall of the first-stage screen (4). The second-stage spiral blade (13) is disposed inside the second-stage screen (9) and has a gap between it and the inner wall of the second-stage screen (9).

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