An in-line screening device for pipeline delivery of biomass fuel

Abstract

The utility model relates to the field of pneumatic pipeline material conveying, and specifically discloses a screening device for improving pipeline conveying of biomass fuel on line, which comprises a conveying belt and a screener, wherein the screener comprises a roller, the roller comprises a first annular plate, a second annular plate, a circular plate, a screening part and a slag discharge part, the first annular plate and the circular plate are respectively located at two ends of the roller, the screening part comprises screening bars, two ends of each screening bar are arranged on the first annular plate and the second annular plate respectively, the screening bars are arranged in a circumferential circular array along the first annular plate and the second annular plate, the spacing between the screening bars is 10-20 mm, the slag discharge part comprises slag discharge bars, two ends of each slag discharge bar are arranged on the circular plate and the second annular plate respectively, the slag discharge bars are arranged in a circumferential circular array along the circular plate and the second annular plate, and the spacing between the slag discharge bars is 25-40 mm. The utility model aims to provide a screening device for improving pipeline conveying of biomass fuel on line, so as to solve the technical problem of how to screen materials.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic pipeline material transportation, and specifically discloses an online screening device for improving the conveying of biomass fuel through pipelines. Background Technology

[0002] The most common screening devices are linear vibrating screens and gyratory screens.

[0003] Linear vibrating screen:

[0004] Linear vibrating screens are typically installed on top of a hopper, with springs at each of the four corners of the hopper for vibration. The screen frame sits on the springs, and a vibrating motor is mounted on the beams on both sides of the feed inlet for driving. The screen openings can be selected and installed according to the actual material conditions. Linear vibrating screens are generally used for screening sand or lumpy materials. The material is automatically separated into different particle sizes by the vibration of the screen. However, currently, this type of linear vibrating screen is not very effective for separating flocculent or agglomerated materials through vibration. In fact, the more it is vibrated, the denser it becomes, and the screened material comes out in clumps, which does not achieve any separation effect.

[0005] Vibrating screen:

[0006] The basic rotary motion driven by a common first motor is similar to manual screening, causing the material to form a three-dimensional rolling motion of horizontal and tossing on the screen. It is evenly dispersed on the entire screen surface from the center to the outer edge, and then propagates axially in a spiral motion. Adjusting the radial and tangential angles on the vibrating body can change the trajectory of the material on the screen surface. The rotary motion of the gyratory screen is similar to manual screening. On the one hand, it screens flocculent or agglomerated materials, and the larger the spheres that roll on the screen, the larger the area it occupies. On the other hand, if it is used in a large screening capacity, the area occupied is also large, the equipment volume is also large, the investment is relatively large, and the maintenance is also relatively complicated. It is not suitable for flocculent or agglomerated materials. Utility Model Content

[0007] In view of this, the purpose of this utility model is to provide an online screening device for pipeline transportation of biomass fuel, so as to solve the technical problem of how to screen materials.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] An online screening device for pipeline transport of biomass fuel includes a conveyor belt and a screener. The conveyor belt is inclined upwards. The screener includes a roller, which comprises a first annular plate, a second annular plate, a circular plate, a screening section, and a slag discharge section. The first annular plate and the circular plate are located at opposite ends of the roller, with the first annular plate close to the conveyor belt. The second annular plate is located in the middle of the roller. The screening section includes screening bars, with both ends of the screening bars respectively disposed on the first and second annular plates. The screening bars are arranged in a circumferential circular array along the first and second annular plates, with a spacing of 10-20 mm between the screening bars. The slag discharge section includes slag discharge bars, with both ends of the slag discharge bars respectively disposed on the circular and second annular plates. The slag discharge bars are arranged in a circumferential circular array along the circular and second annular plates, with a spacing of 25-40 mm between the slag discharge bars.

[0010] Optionally, the screener further includes a first motor and a frame. A transmission chain is provided on the output end of the first motor. Two transmission rollers are rotatably arranged on the frame. One of the transmission rollers is connected to the transmission chain. The first annular plate and the circular plate of the roller are placed on the two transmission rollers.

[0011] Optionally, the circular plate is provided with a slag discharge port, and a slag discharge plate is provided on the slag discharge port.

[0012] Optionally, the spacing between the screening bars is 15 mm, and the spacing between the slag discharge bars is 30 mm.

[0013] Optionally, the transmission roller includes two rotating columns and a roller body. The two rotating columns are respectively fixedly mounted on the roller body. Grooves are formed on the rotating columns, and the circular plate and the first annular plate are placed in the grooves.

[0014] Optionally, the screening bar is hollow inside, as are the first and second annular plates, and the interior of the screening bar is connected to the interior of the first and second annular plates. A top rod is provided inside the screening bar, and a spike is provided on the top rod. Several top holes are opened on the screening bar, and the spike can be protruded from the top holes. A base is provided at the lower end of the top rod, and several bottom holes are provided on the first and second annular plates. The base can be passed through the bottom holes and contact the rotating column.

[0015] Optionally, a spring is provided inside the screening bar, and the spring is connected to the top rod.

[0016] The working principle and beneficial effects of this solution are as follows:

[0017] Compared with the prior art, the advantages of this utility model are that the roller is shaftless, occupies a small area, and can be directly fitted onto the transmission roller. The conveyor belt conveys while the roller rotates. It has a good screening effect on flocculent or agglomerated materials. Compared with linear vibrating screens, it makes the material more compact with vibration. Compared with gyratory screens, the structure of the equipment is more complex. Secondly, it is not suitable for conveying when used in conjunction with conveying equipment. Moreover, gyratory screens have a side effect on flocculent or agglomerated materials during operation, causing the material to agglomerate larger with shaking, which is not conducive to material dispersion.

[0018] Working principle:

[0019] The working principle of the roller screen is that the rollers are driven by a motor to rotate, and the screening section is used to classify and screen the materials. After the materials enter the rollers, due to the rotation of the rollers, the materials are constantly tumbling and thrown up inside the rollers. Materials smaller than the screen aperture size will fall through the screen aperture, while materials larger than the screen aperture size and impurities are carried to the other end of the rollers and discharged. This screening method can effectively separate materials of different particle sizes.

[0020] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0022] Figure 2 This is a partial structural diagram of the screening bar, the first annular plate, and the second annular plate.

[0023] Figure 3 This is a partial structural cross-sectional view of the bottom screening bar and the first and second annular plates.

[0024] The following components are labeled in the attached diagram: 1. Conveyor belt; 2. Frame; 3. Motor; 4. Roller; 5. First annular plate; 6. Second annular plate; 7. Circular plate; 8. Screening bar; 9. Slag discharge bar; 10. Drive roller; 11. Rotating column; 12. Drive chain; 13. Sprocket; 14. Roller body; 15. Bottom hole; 16. Top hole; 17. Top rod; 18. Top spike; 19. Base; 20. Spring. Detailed Implementation

[0025] The following detailed description illustrates the specific implementation method:

[0026] Example

[0027] An online screening device for improving the efficiency of pipeline transport of biomass fuel, such as Figures 1-3As shown, it includes a conveyor belt 1 and a screener. The conveyor belt 1 is inclined upward and the screener is located at the end of the conveyor belt 1.

[0028] The screening device includes a frame 2, a first motor 3, and a roller 4. A transmission chain 12 is provided on the output end of the first motor 3. Two transmission rollers 10 are rotatably mounted on the frame 2, one of which is connected to the transmission chain 12. The transmission roller 10 includes three rotating columns 11 and a roller body 14. Two rotating columns 11 are fixedly mounted on both ends of the roller body 14, and the other rotating column 11 is located in the middle of the roller body 14. A groove is formed on the rotating column 11, and the circular plate 7, the first annular plate 5, and the second annular plate 6 of the roller 4 are all placed in the groove.

[0029] The roller 4 includes a first annular plate 5, a second annular plate 6, a circular plate 7, a screening section, and a slag discharge section. The first annular plate 5 and the circular plate 7 are located at opposite ends of the roller 4, with the first annular plate 5 closer to the conveyor belt 1. The second annular plate 6 is located in the middle of the roller 4. The screening section includes screening bars 8, with both ends of the screening bars 8 respectively positioned on the first annular plate 5 and the second annular plate 6. The screening bars 8 are arranged in a circumferential circular array along the first annular plate 5 and the second annular plate 6, with a spacing of 15 mm between them. The slag discharge section includes slag discharge bars 9, with both ends of the slag discharge bars 9 respectively positioned on the circular plate 7 and the second annular plate 6. The slag discharge bars 9 are arranged in a circumferential circular array along the circular plate 7 and the second annular plate 6, with a spacing of 30 mm between them. A slag discharge port is provided on the circular plate 7, and a slag discharge plate is provided on the slag discharge port.

[0030] The screening bar 8 is hollow inside, as are the first annular plate 5 and the second annular plate 6. The interior of the screening bar 8 is connected to the interiors of the first annular plate 5 and the second annular plate 6. A top rod 17 is installed inside the screening bar 8, and a spike 18 is mounted on the top rod 17. Several top holes 16 are formed on the screening bar 8, through which the spike 18 can protrude. A base 19 is installed at the lower end of the top rod 17. Several bottom holes 15 are formed on the first annular plate 5 and the second annular plate 6, through which the base 19 can pass and contact the rotating column 11. A spring 20 is installed inside the screening bar 8 and is connected to the top rod 17. The structures of the top rod 17, spike 18, and base 19 are relatively complex and can be selected according to actual conditions; these structures may also be omitted.

[0031] The screener also includes a first motor 3 and a frame 2. A transmission chain 12 is provided on the output end of the first motor 3. Two transmission rollers 10 are rotatably arranged on the frame 2. One of the transmission rollers 10 is connected to the transmission chain 12. The connection method is as follows: a sprocket 13 is provided on one of the rotating columns 11 of the transmission roller 10, and the transmission chain 12 is arranged on the sprocket 13.

[0032] In practice:

[0033] The conveyor belt 1 transports the material to the screener. The first motor 3 in the screener starts, driving the transmission chain 12 to move. The transmission chain 12 drives the rotating column 11 to rotate, which in turn drives the transmission roller 10 to rotate. The transmission roller 10 then drives the roller 4 to rotate. The material entering the roller 4 is then screened. Smaller materials are screened out from the screening section, while larger materials are discharged from the slag discharge section. Simultaneously, when the screening bar 8 approaches the rotating column 11, the base 19 of the push rod 17 is pressed into the screening bar 8 by the rotating column 11. The push rod 17 moves upward, driving the spike 18 to move upward as well. The spike 18 punctures some of the material, improving the screening effect. When the base 19 separates from the rotating column 11, the push rod 17 retracts under the action of the spring 20. In this design, the push rod 17 and spike 18 structures can be added or omitted depending on the actual situation.

[0034] The above description is merely an embodiment of this utility model, and common knowledge such as specific structures and characteristics in the solution is not described in detail here. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model, and these should also be considered within the protection scope of this utility model. These modifications and improvements will not affect the effectiveness of the implementation of this utility model or its practicality.

Claims

1. An online screening device for improving the conveying of biomass fuel through pipelines, characterized in that: The device includes a conveyor belt and a screen, wherein the conveyor belt is inclined upwards; the screen includes a roller, which comprises a first annular plate, a second annular plate, a circular plate, a screening section, and a slag discharge section. The first annular plate and the circular plate are located at opposite ends of the roller, with the first annular plate close to the conveyor belt and the second annular plate located in the middle of the roller. The screening section includes screening bars, with both ends of the screening bars respectively disposed on the first and second annular plates. The screening bars are arranged in a circumferential circular array along the first and second annular plates, and the spacing between the screening bars is 10-20 mm. The slag discharge section includes slag discharge bars, with both ends of the slag discharge bars respectively disposed on the circular plate and the second annular plate. The slag discharge bars are arranged in a circumferential circular array along the circular plate and the second annular plate, and the spacing between the slag discharge bars is 25-40 mm.

2. An in-line enhanced screening device for pipeline transport of biomass fuel as claimed in claim 1, wherein: The screening device also includes a first motor and a frame. A transmission chain is provided on the output end of the first motor. Two transmission rollers are rotatably arranged on the frame. One of the transmission rollers is connected to the transmission chain. The first annular plate and the circular plate of the roller are placed on the two transmission rollers.

3. An in-line enhanced screening device for pipeline transport of biomass fuel as claimed in claim 2, wherein: The circular plate has a slag discharge port, and a slag discharge plate is provided on the slag discharge port.

4. An in-line enhanced screening device for pipeline transport of biomass fuel as claimed in claim 3, wherein: The spacing between the screening bars is 15mm, and the spacing between the slag discharge bars is 30mm.

5. The online screening device for improving pipeline transport of biomass fuel according to claim 4, characterized in that: The transmission roller includes two rotating columns and a roller body. The two rotating columns are fixedly mounted on the roller body. Grooves are formed on the rotating columns, and the circular plate and the first annular plate are placed in the grooves.

6. An in-line enhanced screening device for pipeline transport of biomass fuel as claimed in claim 5, wherein: The screening bar is hollow inside, as are the first and second annular plates. The interior of the screening bar is connected to the interior of the first and second annular plates. A top rod is provided inside the screening bar, and a spike is provided on the top rod. Several top holes are opened on the screening bar, and the spike can be protruded from the top holes. A base is provided at the lower end of the top rod. Several bottom holes are provided on the first and second annular plates, and the base can be passed through the bottom holes and contact the rotating column.

7. An in-line enhanced screening device for pipeline transport of biomass fuel as claimed in claim 6, wherein: The screening bar is equipped with a spring inside, and the spring is connected to the top rod.

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