Feeding device for coal product processing and feeding method thereof

Abstract

The invention relates to the technical field of coal product processing, in particular to a feeding device for coal product processing and a feeding method thereof. According to the technical scheme, the device comprises a charging barrel, a mixing barrel, a motor, a screen, a driven shaft and a funnel, the funnel is located below the charging barrel, the conical screen is arranged in the upper end of the funnel, the driven shaft is rotationally installed in the screen, the outer side of the funnel is sleeved with a barrel-shaped shell, a first discharging pipe is arranged at the lower end of the funnel, and a second discharging pipe is arranged at the lower end of the funnel. The first discharging pipe is communicated with the mixing barrel through a conveying pipe, a rotating shaft rotationally installed in the mixing barrel is arranged at the output end of the motor, multiple sets of stirring rods distributed in an annular array are arranged on the outer wall of the rotating shaft, a water inlet pipe is arranged at the upper end of the mixing barrel, and a fan with the output end penetrating through the conveying pipe is arranged on one side of the lower portion of the funnel. Pulverized coal is screened and then blown to the mixing cylinder, high-quality feeding of the pulverized coal in the coal-water slurry processing process is achieved, and the preparation quality of the coal-water slurry is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of coal product processing, and in particular to a feeding device and a feeding method for coal product processing. Background Art

[0002] Coal products refer to various products made from coal or coal derivatives as raw materials. Coal-water slurry is used as industrial boiler fuel. Coal powder and water are mixed into a suspended liquid in a mixing barrel or blender in a certain proportion, and the two are mixed evenly by stirring.

[0003] During the processing of coal-water slurry, coal powder is conveyed through a feeding pipe, and the coal powder is then conveyed to the inside of a mixing device through a feeding pipe. There is no effective screening when the coal powder is added, and the grinding process may result in the presence of large particles of coal powder due to uneven grinding. Large particles of coal powder affect the preparation of coal-water slurry, which in turn leads to unsatisfactory quality of the coal-water slurry after preparation. Therefore, those skilled in the art provide a feeding device and a feeding method for coal product processing to solve the problems raised in the above background technology. Summary of the invention

[0004] The purpose of the present invention is to address the problems existing in the background technology and to provide a feeding device and a feeding method for coal product processing.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a feeding device for coal product processing and a feeding method thereof, comprising a barrel, a mixing barrel, a motor, a screen, a driven shaft and a funnel, the funnel being located below the barrel, a conical screen being arranged inside the upper end of the funnel, a driven shaft being rotatably mounted inside the screen, a cylindrical shell being sleeved on the outer side of the funnel, a discharge pipe being arranged at the lower end of the funnel, the discharge pipe being connected to the mixing barrel through a conveying pipe, a rotating shaft rotatably mounted inside the mixing barrel being arranged at the output end of the motor, a plurality of stirring rods distributed in a circular array being arranged on the outer wall of the rotating shaft, a water inlet pipe being arranged at the upper end of the mixing barrel, and a fan having an output end passing through the conveying pipe being arranged at one side below the funnel.

[0006] Preferably, the lower end of the funnel is provided with a cylindrical partition located inside the shell, and a conveying channel is provided between the shell and the partition. A conveying channel is formed between the partition and the shell, and the large-particle coal powder flowing out through the screen to the outside is output through the conveying channel.

[0007] Preferably, a collecting trough is provided below the housing and below the conveying channel, and the collecting trough collects the coal powder output from the conveying channel to prevent the coal powder from scattering around.

[0008] Preferably, a scraper is provided inside the collecting tank, the collecting tank is annular, and a connecting rod connected to the outer wall of the upper end of the driven shaft is provided on the upper end of the scraper. The scraper is fixed to the connecting rod, and the connecting rod rotates through the driven shaft to drive the scraper to push the coal powder inside the collecting tank, and the coal powder is gathered together for easy cleaning later.

[0009] Preferably, a discharge pipe 3 is provided at the lower end of the barrel, a bearing bracket is provided at the upper end of the barrel, the lower end of the driven shaft is rotatably mounted inside the bearing bracket, and a twisted piece which is spirally distributed and rotatably mounted inside the discharge pipe 3 is sleeved on the outer wall of the driven shaft. The driven shaft is rotatably supported by the bearing bracket, and the spiral twisted piece rotates inside the discharge pipe 3, playing the role of twisting and conveying the coal powder and assisting the flow.

[0010] Preferably, the outer wall of the driven shaft is provided with inclined plates 1 and 2 located on the upper and lower sides of the screen, and the opposite ends of the inclined plates 1 and 2 are provided with scrapers 1 and 2 equidistantly distributed. Inclined plates 1 and 2 rotate with the driven shaft, driving scrapers 1 and 2 to scrape the screen, thereby assisting the flow of coal powder and squeezing out the blocked coal powder.

[0011] Preferably, the lower ends of the funnel and the mixing barrel are both provided with a base, the suction end of the fan is provided with a filter screen, the lower end of the mixing barrel is provided with a discharge pipe 2, and a valve is provided inside the discharge pipe 2. The base supports the bottom of the funnel and the mixing barrel, the airflow sucked by the fan is filtered through the filter screen to prevent external solids from entering the feeding pipeline, the processed coal-water slurry on the inner wall of the mixing barrel is output through the discharge pipe 2, and the control unit controls the opening and closing of the discharge pipe 2.

[0012] Preferably, a guide plate is provided on the inner wall of the lower end of the mixing barrel, fixing rods distributed in a circular array are provided between the barrel and the shell, and supporting rods distributed in a circular array are provided between the screen and the shell. The guide plate guides the coal-water slurry discharged from the mixing barrel, and the coal-water slurry converges to the center, thereby facilitating the discharge of the coal-water slurry.

[0013] Preferably, the outer wall of the rotating shaft is provided with a driving wheel, the outer wall of the driven shaft is sleeved with a transmission wheel with a radius larger than the driving wheel, and a belt is installed for rotation inside the driving wheel and the transmission wheel. The driving wheel rotates with the driven shaft, and drives the transmission wheel to rotate under the linkage of the belt, thereby driving the driven shaft to rotate at a reduced speed.

[0014] A feeding device for coal product processing, the steps of the coal product feeding method are as follows:

[0015] S1: Coal powder and an appropriate amount of clean water are the main raw materials for preparing coal-water slurry. The coal powder is finely ground by a grinding device such as a ball mill. The ground coal powder is conveyed in a barrel and continuously sprinkled onto the screen during the spiral twisting of the shredder. Since it falls at the center above the screen, the coal powder is evenly scattered on the outer wall of the screen and flows outward through the outer wall of the screen in a conical shape. The coal powder with a particle size smaller than the screen passes through the screen and enters the funnel for collection;

[0016] S2: The collected coal powder is sent to the mixing drum through the positive pressure airflow delivered by the fan through the delivery pipe, and is stirred with water inside the mixing drum by a stirring rod driven by a rotating shaft to prepare a coal-water slurry by mixing and stirring;

[0017] S3: When the shaft rotates, the transmission wheel and the driving wheel are linked by the belt, driving the driven shaft to rotate, and then driving the inclined plate 1 and the inclined plate 2 to rotate on the upper and lower sides of the screen, respectively driving the scraper 1 and the scraper 2 to flexibly scrape the upper and lower ends of the screen, helping the flow of coal powder and avoiding coal powder blockage. During the coal-water slurry feeding process, the coal powder can be stably transported.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention transports the coal powder after being pre-stored inside the material cylinder onto the screen, screens the coal powder of suitable particle size through the gap inside the screen, and the intercepted coal powder is transported to the outside through the conical screen. The coal powder enters the mixing cylinder through wind conveying, and is mixed with water for stirring to prepare water-coal slurry. During the process of adding materials for the preparation of water-coal slurry, the coal powder is effectively screened, and the coal powder of qualified particle size is used for the preparation of coal-water slurry, and the quality of the coal-water slurry coal products is guaranteed after processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the main stereoscopic structure of the present invention;

[0021] Figure 2 It is a top view of the three-dimensional structure of the present invention;

[0022] Figure 3 It is a bottom-up three-dimensional structural schematic diagram of the present invention;

[0023] Figure 4 It is a schematic diagram of the main cross-sectional three-dimensional structure of the present invention;

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of the connecting rod of the present invention from top view;

[0025] Figure 6 It is a schematic diagram of the main three-dimensional structure of the screen of the present invention;

[0026] Figure 7It is a schematic diagram of the main three-dimensional structure of the inclined plate 1 and the inclined plate 2 of the present invention.

[0027] Figure numerals: 1. barrel; 2. shell; 3. collecting tank; 4. base; 5. mixing barrel; 6. conveying pipe; 7. water inlet pipe; 8. motor; 9. transmission wheel; 10. bearing bracket; 11. fixing rod; 12. screen; 13. fan; 14. discharge pipe one; 15. discharge pipe two; 16. belt; 17. driven shaft; 18. discharge pipe three; 19. partition; 20. rotating shaft; 21. guide plate; 22. stirring rod; 23. driving wheel; 24. connecting rod; 25. scraper; 26. slice; 27. funnel; 28. inclined plate one; 29. ​​scraper blade one; 30. inclined plate two; 31. support rod; 32. scraper blade two. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figures 1 to 7 , the present invention provides three embodiments:

[0030] Embodiment 1:

[0031] A feeding device for coal product processing, comprising a barrel 1, a mixing barrel 5, a motor 8, a screen 12, a driven shaft 17 and a funnel 27, wherein the funnel 27 is located below the barrel 1, a conical screen 12 is provided inside the upper end of the funnel 27, a driven shaft 17 is rotatably installed inside the screen 12, a cylindrical housing 2 is sleeved on the outer side of the funnel 27, a discharge pipe 14 is provided at the lower end of the funnel 27, the discharge pipe 14 is connected to the mixing barrel 5 through a conveying pipe 6, a rotating shaft 20 rotatably installed inside the mixing barrel 5 is provided at the output end of the motor 8, a plurality of stirring rods 22 distributed in a ring array are provided on the outer wall of the rotating shaft 20, a water inlet pipe 7 is provided at the upper end of the mixing barrel 5, and a fan 13 whose output end passes through the conveying pipe 6 is provided on one side below the funnel 27;

[0032] The lower ends of the funnel 27 and the mixing cylinder 5 are both provided with a base 4, the suction end of the fan 13 is provided with a filter screen, the lower end of the mixing cylinder 5 is provided with a discharge pipe 15, and a valve is provided inside the discharge pipe 15;

[0033] The lower end of the barrel 1 is provided with a discharge pipe 3 18, the upper end of the barrel 1 is provided with a bearing bracket 10, the lower end of the driven shaft 17 is rotatably mounted inside the bearing bracket 10, and the outer wall of the driven shaft 17 is sleeved with a spirally distributed and rotatably mounted inside the discharge pipe 3 18;

[0034] In this embodiment, the ground coal powder is transported to the barrel 1 and pre-stored through the barrel 1. When the driven shaft 17 drives the slice 26 to rotate, the coal powder pre-stored after grinding inside the barrel 1 is transported. After transportation, the coal powder falls directly above the screen 12. After falling, the coal powder is dispersed through the conical screen 12 and flows to a lower horizontal position. During the flow, the coal powder passes through the pores of the screen 12 and enters the funnel 27, and enters the conveying pipe 6 through the discharge pipe 14. It is transported by the wind of the fan 13, flows in the conveying pipe 6, and enters the mixing barrel 5. The water inlet pipe 7 is connected to the pipeline to transport water for preparing the coal-water slurry. During the transportation of the coal powder slurry, the motor 8 drives the shaft 20 to rotate, driving the stirring rod 22 to stir the coal powder and water. It is worth mentioning What is more, an opening for adding auxiliary materials needs to be opened at the upper end of the mixing drum 5, and the mixing drum 5 needs to be equipped with a heating device to assist in the preparation of coal-water slurry. Coal powder and water are mixed in a certain proportion in the mixing drum, and the two are mixed evenly by stirring. The mixed coal powder and water mixture is heated, which helps to form a uniform and stable coal-water slurry. According to the requirements of use, other chemical substances can be added in the production process to adjust the viscosity and fluidity of the coal-water slurry to ensure proper combustion characteristics. After processing, the coal-water slurry is output through the discharge pipe 15 and stored in a suitable container for subsequent transportation and use. In the coal-water slurry preparation process, the situation that large-particle coal powder is difficult to fuse and affects the quality of coal product coal-water slurry preparation is avoided. In the coal-water slurry preparation process, the coal powder is screened to improve the quality of the coal-water slurry.

[0035] Embodiment 2:

[0036] The lower end of the funnel 27 is provided with a cylindrical partition 19 located inside the shell 2, and a conveying channel is provided between the shell 2 and the partition 19;

[0037] A collecting tank 3 is provided below the housing 2 and below the conveying channel;

[0038] A scraper 25 is provided inside the collecting tank 3, and the collecting tank 3 is annular. A connecting rod 24 connected to the outer wall of the upper end of the driven shaft 17 is provided at the upper end of the scraper 25;

[0039] The outer wall of the driven shaft 17 is provided with an inclined plate 1 28 and an inclined plate 2 30 located at the upper and lower sides of the screen 12, and the inclined plate 1 28 and the inclined plate 2 30 are provided with a scraper 1 29 and a scraper 2 32 at an equidistant distribution at the opposite ends thereof;

[0040] A guide plate 21 is provided on the inner wall of the lower end of the mixing barrel 5, fixing rods 11 distributed in a circular array are provided between the barrel 1 and the shell 2, and supporting rods 31 distributed in a circular array are provided between the screen 12 and the shell 2;

[0041] The outer wall of the rotating shaft 20 is provided with a driving wheel 23, and the outer wall of the driven shaft 17 is sleeved with a transmission wheel 9 having a radius larger than the driving wheel 23, and a belt 16 is rotatably installed inside the driving wheel 23 and the transmission wheel 9;

[0042] In this embodiment, when the motor 8 drives the rotating shaft 20 to rotate, it drives the driving wheel 23 to rotate. The driving wheel 23 is linked to the transmission wheel 9 through the belt 16 to rotate, and then the driven shaft 17 rotates. When the driven shaft 17 rotates, it drives the slice 26 and the inclined plate 1 28 and the inclined plate 2 30 to rotate. During the output process of the coal powder inside the barrel 1, the rotation power of the slice 26 is consistent with the power source of the mixing barrel 5, and during the screening of the coal powder through the screen 12, the inclined plate 1 28 and the inclined plate 2 30 drive the scraper 1 29 and the scraper 2 32 to rotate, and the scraper The scraper blade 29 and the scraper blade 2 32 scrape the outer wall of the screen 12. The scraper blade 29 and the scraper blade 2 32 are both made of rubber and are in flexible contact with the screen 12. The scraper blade 29 scrapes the coal powder during the flow process, thereby improving the screening effect. The scraper blade 2 32 scrapes the lower end of the screen 12 to squeeze out the coal powder blocked on the inner wall of the screen 12, thereby ensuring the smoothness of the coal powder screening. The use of the twisted piece 26, the inclined plate 1 28 and the inclined plate 2 30 does not require the use of additional power equipment, thereby reducing the energy consumption in the process of coal product processing;

[0043] When the screened large-particle coal powder passes through the screen 12, it is intercepted by the shell 2 and limited by the partition 19 and transported to the inside of the collecting tank 3. When the driven shaft 17 rotates, the scraper 25 is driven to rotate through the connecting rod 24. The scraper 25 pushes the large-particle coal powder inside the collecting tank 3, so that the large-particle coal powder is gathered together, which is convenient for the staff to recover and clean. The use of the scraper 25 does not require the use of additional electrical equipment, thereby reducing energy consumption.

[0044] Embodiment three:

[0045] A feeding device for coal product processing, the steps of the coal product feeding method are as follows:

[0046] S1: Coal powder and an appropriate amount of clean water are the main raw materials for preparing coal-water slurry. The coal powder is finely ground by a grinding device such as a ball mill. The ground coal powder is continuously sprinkled onto the screen 12 in the spiral twisting of the twisting piece 26 in the conveying barrel 1. Because it falls at the center above the screen 12, the coal powder is evenly scattered on the outer wall of the screen 12, and flows outward through the outer wall of the screen 12 in a conical shape. The coal powder with a particle size smaller than the screen 12 passes through the screen 12 and enters the funnel 27 for collection;

[0047] S2: The collected coal powder is delivered to the mixing drum 5 through the delivery pipe 6 by the positive pressure airflow delivered by the fan 13, and is stirred with water by the stirring rod 22 driven by the rotating shaft 20 inside the mixing drum 5 to prepare the coal-water slurry by mixing and stirring;

[0048] S3: When the rotating shaft 20 rotates, the transmission wheel 9 and the driving wheel 23 drive the driven shaft 17 to rotate through the linkage of the belt 16, and then drive the inclined plate 1 28 and the inclined plate 2 30 to rotate on the upper and lower sides of the screen 12, respectively driving the scraper 1 29 and the scraper 2 32 to flexibly scrape the upper and lower ends of the screen 12, thereby helping the flow of coal powder and avoiding coal powder blockage. During the coal-water slurry feeding process, the coal powder can be stably transported.

[0049] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

[0050] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A feeding device for coal product processing, comprising a feeding barrel (1), a mixing barrel (5), a motor (8), a screen (12), a driven shaft (17) and a funnel (27), characterized in that: The funnel (27) is located below the barrel (1). A conical screen (12) is arranged inside the upper end of the funnel (27). A driven shaft (17) is rotatably mounted inside the screen (12). A cylindrical shell (2) is sleeved on the outer side of the funnel (27). A discharge pipe (14) is arranged at the lower end of the funnel (27). The discharge pipe (14) is connected to the mixing barrel (5) through a conveying pipe (6). A rotating shaft (20) rotatably mounted inside the mixing barrel (5) is arranged at the output end of the motor (8). A plurality of stirring rods (22) distributed in a circular array are arranged on the outer wall of the rotating shaft (20). A water inlet pipe (7) is arranged at the upper end of the mixing barrel (5). A fan (13) is arranged at the lower side of the funnel (27), the output end of which passes through the conveying pipe (6).

2. A feeding device for coal product processing according to claim 1, characterized in that: The lower end of the funnel (27) is provided with a cylindrical partition (19) located inside the shell (2), and a conveying channel is provided between the shell (2) and the partition (19).

3. A feeding device for coal product processing according to claim 2, characterized in that: A collecting trough (3) located below the conveying channel is provided below the shell (2).

4. A feeding device for coal product processing according to claim 3, characterized in that: A scraper (25) is arranged inside the collecting trough (3), the collecting trough (3) is annular, and a connecting rod (24) connected to the outer wall of the upper end of the driven shaft (17) is arranged at the upper end of the scraper (25).

5. A feeding device for coal product processing according to claim 1, characterized in that: A discharge pipe three (18) is arranged at the lower end of the barrel (1), a bearing bracket (10) is arranged at the upper end of the barrel (1), the lower end of the driven shaft (17) is rotatably mounted inside the bearing bracket (10), and a twisted piece (26) which is spirally distributed and rotatably mounted inside the discharge pipe three (18) is sleeved on the outer wall of the driven shaft (17).

6. A feeding device for coal product processing according to claim 1, characterized in that: The outer wall of the driven shaft (17) is provided with an inclined plate 1 (28) and an inclined plate 2 (30) located at the upper and lower sides of the screen (12), and the inclined plate 1 (28) and the inclined plate 2 (30) are provided with scraper blades 1 (29) and scraper blades 2 (32) distributed equidistantly at opposite ends.

7. A feeding device for coal product processing according to claim 1, characterized in that: The lower ends of the funnel (27) and the mixing cylinder (5) are both provided with a base (4), the suction end of the fan (13) is provided with a filter screen, the lower end of the mixing cylinder (5) is provided with a discharge pipe 2 (15), and a valve is provided inside the discharge pipe 2 (15).

8. A feeding device for coal product processing according to claim 1, characterized in that: A guide plate (21) is provided on the inner wall of the lower end of the mixing barrel (5), fixing rods (11) distributed in a ring array are provided between the barrel (1) and the shell (2), and supporting rods (31) distributed in a ring array are provided between the screen (12) and the shell (2).

9. A feeding device for coal product processing according to claim 1, characterized in that: The outer wall of the rotating shaft (20) is provided with a driving wheel (23), the outer wall of the driven shaft (17) is sleeved with a transmission wheel (9) having a radius greater than that of the driving wheel (23), and a belt (16) is rotatably installed inside the driving wheel (23) and the transmission wheel (9).

10. A feeding device for coal product processing, characterized in that: The steps of coal product charging method are as follows: S1: Coal powder and an appropriate amount of clean water are the main raw materials for preparing coal-water slurry. The coal powder is finely ground by a grinding device such as a ball mill. The ground coal powder is continuously sprinkled onto the screen (12) in the spiral twisting of the twisting piece (26) in the conveying barrel (1). Since the coal powder falls at the center above the screen (12), it is evenly scattered on the outer wall of the screen (12) and flows outward in a conical shape through the outer wall of the screen (12). The coal powder with a particle size smaller than that of the screen (12) passes through the screen (12) and enters the funnel (27) for collection; S2: The collected coal powder is delivered to the mixing drum (5) through the delivery pipe (6) by the positive pressure airflow delivered by the fan (13), and is stirred with water inside the mixing drum (5) by the stirring rod (22) driven by the rotating shaft (20), so as to prepare the coal-water slurry by mixing and stirring; S3: When the rotating shaft (20) rotates, the transmission wheel (9) and the driving wheel (23) are linked by the belt (16), driving the driven shaft (17) to rotate, thereby driving the inclined plate 1 (28) and the inclined plate 2 (30) to rotate on the upper and lower sides of the screen (12), respectively driving the scraper 1 (29) and the scraper 2 (32) to flexibly scrape the upper and lower ends of the screen (12), thereby helping the flow of coal powder and avoiding the blockage of coal powder. During the coal-water slurry feeding process, the coal powder is stably transported.

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