Biomass powder high-pressure pneumatic conveying device

Abstract

The utility model relates to the technical field of powder conveying, in particular to a biomass powder high-pressure pneumatic conveying device. The device comprises a material tank, a storage box, a pneumatic conveying device, a discharging device and a filtering device, a bracket is arranged at the bottom end of the charging bucket; the pneumatic conveying device comprises a fan and a conveying pipeline; the upper end and the lower end of the discharging device communicate with the material tank and the conveying pipeline correspondingly. The filtering device comprises an outer barrel and a filtering pipe. According to the technical scheme, the automatic dust removal effect can be achieved in the operation process, and the advantage of being high in automation degree is achieved.

Description

Technical Field

[0001] This utility model relates to the field of powder conveying technology, and in particular to a high-pressure pneumatic conveying device for biomass powder. Background Technology

[0002] Biomass energy, as a renewable and clean energy source, is widely used in industrial fuel substitution and carbon neutrality. Biomass powders (such as sawdust, straw powder, and rice husk powder) have become core raw materials for gasification power generation and boiler combustion due to their high energy density and ease of processing. In large-scale production, the powders need to be transported from storage units to the reaction device. High-pressure pneumatic conveying technology has become the mainstream conveying method due to its advantages of good sealing, long conveying distance, and high degree of automation.

[0003] In existing technologies, a filter screen needs to be installed at the end of the feeding process to separate solid substances and gases. After a certain period of use, the filter screen is prone to clogging. Manual cleaning of the filter screen can only provide temporary relief, and disassembly is cumbersome, which can lead to poor gas discharge. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a high-pressure pneumatic conveying device for biomass powder.

[0005] The technical solution of this utility model is a high-pressure pneumatic conveying device for biomass powder, which includes a material tank, a storage box, a pneumatic conveying device, a feeding device, and a filtering device.

[0006] A support is installed at the bottom of the material tank; the pneumatic conveying device includes a blower and a conveying pipe. The blower is mounted on the support, and one end of the conveying pipe is connected to the output end of the blower, while the other end is connected to the inside of the storage tank; the upper and lower ends of the feeding device are respectively connected to the material tank and the conveying pipe; the filtration device includes an outer cylinder and a filter tube. The outer cylinder is located above the storage tank, and a third connecting pipe is installed between the outer cylinder and the storage tank. An installation ring is installed on the inner wall of the outer cylinder, and the filter tube is rotatably installed inside the installation ring. Several filter holes are opened on the filter tube; the inner wall of the filter holes is arranged in a ring array. The filter tube is equipped with multiple partition plates. A first arc-shaped plate is installed on the inner side of the filter tube and is connected to the upper end of the inner wall of the outer cylinder. A second arc-shaped plate is installed at both the upper and lower ends of the first arc-shaped plate. Two baffles are installed between the outer cylinder and the filter tube. Both baffles are connected to the mounting ring. A first connecting pipe and a second connecting pipe are connected on the outer cylinder between the two baffles. The other end of the first connecting pipe is connected to the upper end of the outer cylinder, and the other end of the second connecting pipe is connected to the lower end of the outer cylinder. Multiple blades are arranged in a ring array at the lower part of the filter holes. An exhaust pipe is connected to the bottom end of the outer cylinder.

[0007] Preferably, the feeding device includes a servo motor, an upper fixed plate, a lower fixed plate, an upper turntable, a lower turntable, a first discharge pipe, a second discharge pipe, and multiple storage pipes. The upper and lower fixed plates are both connected to a support frame, with the upper fixed plate directly above the lower fixed plate. Multiple storage pipes are arranged in a circular array between the upper and lower fixed plates. The upper and lower turntables are rotatably mounted on the upper and lower fixed plates, respectively. The upper and lower ends of the storage pipes pass through the upper and lower turntables, respectively. The first discharge pipe is connected to the bottom of the material tank, and its bottom end passes through the upper fixed plate. The second discharge pipe is connected to a conveying pipe, and its second discharge pipe passes through the lower fixed plate. The servo motor is mounted on the support frame, and a drive shaft is connected to its output shaft. The drive shaft movably passes through the center of the upper fixed plate and is fixedly connected to the upper and lower turntables.

[0008] Preferably, the first arc-shaped plate, the filter tube, and the two second arc-shaped plates together form an arc-shaped channel, and the separator is fitted with the inner side of the arc-shaped channel with a clearance.

[0009] Preferably, all filter holes are located above the mounting ring.

[0010] Preferably, the filter tube is a round tube, and the inner wall of the outer cylinder is provided with annular grooves at both the upper and lower ends that fit with the end of the filter tube.

[0011] Preferably, the spray direction at the output end of the second connecting pipe forms an angle with the radial direction of the outer cylinder.

[0012] Compared with the prior art, the present invention has the following beneficial technical effects: In this technical solution, the gas separated by the filter tube is used to perform reverse dust removal on its surface, and the kinetic energy of the exhaust airflow is used to drive multiple blades to rotate and drive the filter tube to rotate, thereby realizing the comprehensive and uninterrupted dust removal work of the filter tube, which can alleviate the clogging of the filter tube. The whole structure is simple and efficient, and no additional power mechanism is required, with a high degree of automation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 and Figure 3 All of these are cross-sectional structural diagrams of the outer cylinder of this utility model.

[0015] Figure 4 This is a partial structural diagram of the feeding device in this utility model.

[0016] Reference numerals in the attached drawings: 1. Material tank; 2. Storage box; 3. Support; 4. Fan; 5. First discharge pipe; 6. Servo motor; 7. Conveying pipe; 8. Outer cylinder; 9. Blade; 10. Storage pipe; 11. First connecting pipe; 12. Second connecting pipe; 13. Exhaust pipe; 14. Upper fixed plate; 15. Lower fixed plate; 16. Second discharge pipe; 17. Upper turntable; 18. Lower turntable; 19. Filter pipe; 191. Filter hole; 20. Separator; 21. First arc plate; 22. Second arc plate; 23. Baffle; 24. Mounting ring; 25. Third connecting pipe. Detailed Implementation

[0017] Example 1

[0018] like Figures 1-3 As shown in the figure, the high-pressure pneumatic conveying device for biomass powder proposed in this embodiment includes a material tank 1, a storage box 2, a pneumatic conveying device, a feeding device, and a filtering device.

[0019] The bottom of the material tank 1 is provided with a support 3; the pneumatic conveying device includes a blower 4 and a conveying pipe 7. The blower 4 is installed on the support 3, one end of the conveying pipe 7 is connected to the output end of the blower 4, and the other end is connected to the inside of the storage box 2; the upper and lower ends of the feeding device are connected to the material tank 1 and the conveying pipe 7 respectively.

[0020] The filtration device includes an outer cylinder 8 and a filter tube 19. The outer cylinder 8 is located above the storage tank 2. A third connecting pipe 25 is provided between the outer cylinder 8 and the storage tank 2. An installation ring 24 is provided on the inner wall of the outer cylinder 8. The filter tube 19 is a round tube. The upper and lower ends of the inner wall of the outer cylinder 8 are provided with annular grooves that fit with the ends of the filter tube 19. This arrangement can reduce the probability of material overflowing from the upper and lower ends of the filter tube 19 to its outside. The filter tube 19 is rotatably installed inside the installation ring 24. Several filter holes 191 are provided on the filter tube 19, and the filter holes 191 are all located above the installation ring 24.

[0021] Multiple separators 20 are arranged in a ring array on the inner wall of the filter pore 191. A first arc-shaped plate 21 is provided on the inner side of the filter tube 19. The first arc-shaped plate 21 is connected to the upper end of the inner wall of the outer cylinder 8. A second arc-shaped plate 22 is provided at both the upper and lower ends of the first arc-shaped plate 21. The first arc-shaped plate 21, the filter tube 19, and the two second arc-shaped plates 22 together form an arc-shaped channel. The separators 20 are fitted with the inner side of the arc-shaped channel with a clearance. Two baffles 23 are provided between the outer cylinder 8 and the filter tube 19. All baffles 23 are connected to mounting rings 24. A first connecting pipe 11 and a second connecting pipe 12 are connected to the outer cylinder 8 between the two baffles 23. The other end of the first connecting pipe 11 is connected to the upper end of the outer cylinder 8, and the other end of the second connecting pipe 12 is connected to the lower end of the outer cylinder 8. The spray direction of the output end of the second connecting pipe 12 forms an angle with the radial direction of the outer cylinder 8. Multiple blades 9 are arranged in a ring array at the lower part of the filter hole 191. An exhaust pipe 13 is connected to the bottom end of the outer cylinder 8.

[0022] It should be added that a PLC controller is used to control the equipment in this technical solution.

[0023] In this embodiment, the material stored inside the material tank 1 enters the conveying pipe 7 through the feeding device. The blower 4 blows the powder into the conveying pipe 7 by delivering high-pressure airflow into the conveying pipe 7, and finally the powder is conveyed to the storage tank 2.

[0024] For ease of description, in this technical solution, the area above the mounting ring 24 located between the outer cylinder 8 and the filter tube 19 and outside the two baffles 23 is referred to as the first cavity, the area between the two baffles 23 is referred to as the second cavity, and the area below the mounting ring 24 located between the outer cylinder 8 and the filter tube 19 is referred to as the third cavity.

[0025] Excess gas enters the inner side of filter tube 19 through the third connecting pipe 25. Several filter holes 191 on filter tube 19 are used to intercept and filter solid powder, allowing gas to exit only into the first chamber. The filtered gas then flows into the inner side of the second chamber through the first connecting pipe 11. The high-speed airflow entering the second chamber blows towards the outer surface of filter tube 19, thereby achieving reverse dust removal of filter tube 19 and alleviating clogging of the filter holes 191 on filter tube 19. Dust blown out from the filter holes 191 falls into the adjacent two... The gas inside the second chamber enters the third chamber through the second connecting pipe 12, which blows multiple blades 9 to rotate. The rotation of the blades 9 drives the filter tube 19 to rotate. During the rotation, the filter tube 19 can complete the comprehensive dust removal work on its surface. When the dust blown off moves out from the inside of the arc-shaped channel, it falls back into the storage box 2. Finally, the gas inside the third chamber is discharged through the exhaust pipe 13. Furthermore, a cloth bag can be installed at the outer end of the exhaust pipe 13 to improve the purity of the output gas.

[0026] Example 2

[0027] like Figure 1 and Figure 4 As shown, this embodiment proposes a high-pressure pneumatic conveying device for biomass powder. Compared to Embodiment 1, in this embodiment, the feeding device includes a servo motor 6, an upper fixed plate 14, a lower fixed plate 15, an upper turntable 17, a lower turntable 18, a first discharge pipe 5, a second discharge pipe 16, and multiple storage pipes 10. The upper fixed plate 14 and the lower fixed plate 15 are both connected to the support 3. The upper fixed plate 14 is located directly above the lower fixed plate 15. The multiple storage pipes 10 are arranged in a circular array between the upper fixed plate 14 and the lower fixed plate 15. The upper turntable 17 and the lower turntable 18 are rotatably mounted on the upper fixed plate 14 and the lower fixed plate 15, respectively. The upper and lower ends of the storage pipes 10 pass through the upper turntable 17 and the lower turntable 18, respectively. The first discharge pipe 5 is connected to the bottom of the material tank 1, and the bottom end of the first discharge pipe 5 passes through the upper fixed plate 14. The second discharge pipe 16 is connected to the conveying pipe 7, and the second... The discharge pipe 16 passes through the lower fixed plate 15. The servo motor 6 is mounted on the bracket 3, and a drive shaft is connected to its output shaft. The drive shaft passes through the center of the upper fixed plate 14 and is fixedly connected to the upper turntable 17 and the lower turntable 18. The servo motor 6 is started to drive the upper turntable 17 and the lower turntable 18 to rotate, thereby driving multiple storage pipes 10 to rotate around the center of the upper turntable 17. When a storage pipe 10 is vertically aligned with the first discharge pipe 5, the powder inside the material tank 1 enters the corresponding storage pipe 10 through the first discharge pipe 5. As the multiple storage pipes 10 continue to rotate, when the storage pipe 10 containing the material is vertically aligned with the second discharge pipe 16, the powder inside the storage pipe 10 falls into the conveying pipe 7 through the second discharge pipe 16. The above structure can prevent the high-speed airflow blown by the fan 4 from entering the material tank 1, thus preventing interference with the material conveying.

[0028] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A high-pressure pneumatic conveying device for biomass powder, characterized in that, It includes a material tank (1), a storage box (2), a pneumatic conveying device, a feeding device, and a filtering device; A support (3) is provided at the bottom of the material tank (1); the pneumatic conveying device includes a blower (4) and a conveying pipe (7). The blower (4) is installed on the support (3). One end of the conveying pipe (7) is connected to the output end of the blower (4), and the other end is connected to the inside of the storage tank (2); the upper and lower ends of the feeding device are connected to the material tank (1) and the conveying pipe (7) respectively; the filtering device includes an outer cylinder (8) and a filter tube (19). The outer cylinder (8) is located above the storage tank (2). A third connecting pipe (25) is provided between the outer cylinder (8) and the storage tank (2). An installation ring (24) is provided on the inner wall of the outer cylinder (8). The filter tube (19) is rotatably installed inside the installation ring (24). Several filter holes (191) are opened on the filter tube (19). A ring array is arranged on the inner wall of the filter holes (191). Multiple partition plates (20) are provided. A first arc plate (21) is provided on the inner side of the filter tube (19). The first arc plate (21) is connected to the upper end of the inner wall of the outer cylinder (8). A second arc plate (22) is provided at both the upper and lower ends of the first arc plate (21). Two baffles (23) are provided between the outer cylinder (8) and the filter tube (19). Both baffles (23) are connected to the mounting ring (24). A first connecting pipe (11) and a second connecting pipe (12) are connected on the outer cylinder (8) and located between the two baffles (23). The other end of the first connecting pipe (11) is connected to the upper end of the outer cylinder (8), and the other end of the second connecting pipe (12) is connected to the lower end of the outer cylinder (8). Multiple blades (9) are arranged in a ring array at the lower part of the filter hole (191). An exhaust pipe (13) is connected to the bottom end of the outer cylinder (8).

2. The high-pressure pneumatic conveying device for biomass powder according to claim 1, characterized in that, The feeding device includes a servo motor (6), an upper fixed plate (14), a lower fixed plate (15), an upper turntable (17), a lower turntable (18), a first discharge pipe (5), a second discharge pipe (16), and multiple storage pipes (10). The upper fixed plate (14) and the lower fixed plate (15) are both connected to a bracket (3). The upper fixed plate (14) is located directly above the lower fixed plate (15). Multiple storage pipes (10) are arranged in a circular array between the upper fixed plate (14) and the lower fixed plate (15). The upper turntable (17) and the lower turntable (18) are rotatably mounted on the upper fixed plate (17). 4) On the lower fixed plate (15), the upper and lower ends of the storage tube (10) pass through the upper turntable (17) and the lower turntable (18) respectively. The first discharge pipe (5) is connected to the bottom end of the material tank (1), and the bottom end of the first discharge pipe (5) passes through the upper fixed plate (14). The second discharge pipe (16) is connected to the conveying pipe (7), and the second discharge pipe (16) passes through the lower fixed plate (15). The servo motor (6) is mounted on the bracket (3), and a transmission shaft is connected to its output shaft. The transmission shaft moves through the center of the upper fixed plate (14) and is fixedly connected to the upper turntable (17) and the lower turntable (18).

3. The high-pressure pneumatic conveying device for biomass powder according to claim 1, characterized in that, The first arc plate (21), the filter tube (19) and the two second arc plates (22) together form an arc-shaped channel, and the separator (20) is fitted with the inner side of the arc-shaped channel with a gap.

4. The high-pressure pneumatic conveying device for biomass powder according to claim 1, characterized in that, Several filter holes (191) are located above the mounting ring (24).

5. The high-pressure pneumatic conveying device for biomass powder according to claim 1, characterized in that, The filter tube (19) is a round tube, and the inner wall of the outer cylinder (8) is provided with annular grooves at the upper and lower ends that fit with the end of the filter tube (19).

6. The high-pressure pneumatic conveying device for biomass powder according to claim 1, characterized in that, The jetting direction at the output end of the second connecting pipe (12) forms an angle with the radial direction of the outer cylinder (8).

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