Fine grinding and screening equipment for oil-rich pulverized coal

Abstract

The utility model relates to the technical field of oil-rich coal grinding, in particular to fine grinding and screening equipment for oil-rich pulverized coal, which is characterized in that a connecting shaft is rotatably connected below the middle of a fine grinding roller group in a box body, a plurality of scattering pieces are fixedly connected onto the connecting shaft, a screening plate is rotatably connected below the connecting shaft in the box body, and the scattering pieces are fixedly connected onto the screening plate. One end of the sieve plate penetrates through a through hole formed in the box body and extends to the outer side of the box body, an eccentric wheel is rotationally connected in the box body, the eccentric wheel is in transmission connection with the connecting shaft, and the eccentric wheel is in contact with the lower surface of the sieve plate. The connecting shaft is rotationally arranged under the middle of the fine grinding roller set, and the scattering pieces are fixedly connected to the connecting shaft at intervals, so that in the fine grinding process of the oil-rich pulverized coal, the scattering pieces can scatter the pulverized coal subjected to fine grinding, and the problems that the caked pulverized coal cannot be effectively screened, the screening effect is poor, and the efficiency is low are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil-rich coal grinding, in particular to fine grinding and screening equipment for oil-rich pulverized coal. Background Art

[0002] Oil-rich coal is a type of coal rich in oil, characterized by releasing large amounts of heat and fuel gas when burned. Currently, oil-rich lumps can be processed into coal chemical plants for oil and gas extraction. However, the oil-rich pulverized coal produced during mining, which accounts for at least 30%, can only be supplied to power plants as "fuel" and thermal coal, failing to realize its full economic value. High-calorific-value briquetted coal produced from oil-rich pulverized coal is an innovative coal product in the field of industrial gasification. This product utilizes the natural properties of oil-rich pulverized coal to form lumps suitable for use as raw material in gasifiers for chemical and other industries. These products offer stable performance, eliminate dust and spontaneous combustion, and meet the requirements for safe storage and long-distance transportation. Before briquetting oil-rich pulverized coal, a series of processes are typically required, with fine grinding and screening being a key step in ensuring the quality of the briquetted coal. Due to the inherent characteristics of oil-rich pulverized coal, existing fine-grinding and screening equipment for oil-rich pulverized coal can cause some of the ground coal to stick together after fine grinding, hindering subsequent screening processes. Furthermore, some of the oil-rich pulverized coal can stick to the grinding rollers, impacting grinding efficiency. Therefore, there is a need to develop a fine-grinding and screening equipment for oil-rich pulverized coal that can prevent coal from sticking together after grinding and improve screening quality and efficiency. Utility Model Content

[0003] In response to the above technical problems, the utility model provides a fine grinding and screening equipment for oil-rich pulverized coal, which can prevent the pulverized coal from sticking together after grinding, improve the screening quality and screening efficiency, and solve the problem that the existing oil-rich pulverized coal fine grinding and screening equipment easily causes the pulverized coal to stick together and is difficult to screen.

[0004] In order to solve the above technical problems, the utility model describes a fine grinding and screening equipment for oil-rich pulverized coal, including a box body, the top of the box body is connected to a feed hopper, the bottom end is connected to a discharge pipe, the upper part of the box body is rotatably connected to a fine grinding roller group, the fine grinding roller group is driven by a first motor, and a connecting shaft is rotatably connected to the lower middle part of the fine grinding roller group in the box body, a plurality of breaking pieces are fixedly connected to the connecting shaft, one end of the connecting shaft is fixedly connected to the output shaft of the second motor, a sieve plate is rotatably connected to the lower part of the connecting shaft in the box body, one end of the sieve plate extends to the outside of the sieve plate through the through hole opened in the box body, a collecting box is provided outside the box body below the sieve plate, an eccentric wheel is rotatably connected to the box body, the eccentric wheel is transmission-connected to the connecting shaft, and the eccentric wheel is in contact with the lower surface of the sieve plate.

[0005] Furthermore, the fine grinding roller group consists of two fine grinding rollers that rotate relative to each other, and the fine grinding rollers are rotatably connected to the box body through roller shafts. One of the roller shafts at one end passes through the box body and is fixedly connected to the first motor output shaft, and the two roller shafts at the other end pass through the box body and are fixedly connected with mutually meshing gears.

[0006] Furthermore, sliding shafts are slidably connected on both sides of the box body, one end of the sliding shaft located inside the box body is fixedly connected to a cleaning brush, and the other end located outside the box body is fixedly connected to a connecting plate, and telescopic rods are fixedly connected on both sides of the box body, and the output end of the telescopic rod is fixedly connected to the connecting plate.

[0007] Furthermore, a rotating shaft is rotatably connected in the box body, one end of the rotating shaft is fixedly connected to the eccentric wheel, and the other end is fixedly connected to the driven wheel. One end of the connecting shaft is fixedly connected to the driving wheel, and the driving wheel and the driven wheel are connected through a belt transmission.

[0008] Furthermore, arc-shaped convex strips are fixedly connected to the sieve plate at intervals.

[0009] Furthermore, guide plates inclined toward the middle of the fine grinding roller group are fixedly connected to both sides of the feed hopper in the box.

[0010] Compared with the prior art, the present invention has the following advantages:

[0011] The utility model has a connecting shaft rotatably arranged just below the middle of the fine grinding roller group, and a number of breaking-up pieces are fixedly connected to the connecting shaft at intervals. During the fine grinding of oil-rich pulverized coal, the breaking-up pieces can break up the finely ground pulverized coal, avoiding the problems of inability to effectively screen the agglomerated pulverized coal, poor screening effect, and low efficiency. Moreover, the eccentric wheel drives the screen plate to vibrate up and down, so that the finely ground pulverized coal can be fully screened. The setting of the cleaning brush can facilitate the cleaning of the fine grinding roller, and the telescopic rod can adjust the position of the cleaning brush to ensure a good cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the utility model.

[0013] Figure 2 for Figure 1 Top view of .

[0014] Figure 3 for Figure 1 External structural view.

[0015] In the figure: 1. Box body, 2. Feed hopper, 3. Discharge pipe, 4. Fine grinding roller, 5. First motor, 6. Gear, 7. Connecting shaft, 8. Breaking piece, 9. Second motor, 10. Screen plate, 11. Eccentric wheel, 12. Collecting box, 13. Cleaning brush, 14. Sliding shaft, 15. Connecting plate, 16. Telescopic rod, 17. Arc convex strip, 18. Driving wheel, 19. Driven wheel, 20. Belt, 21. Guide plate. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] like Figure 1 、 2 3 is a fine grinding and screening device for oil-rich pulverized coal, comprising a box body 1, a feed hopper 2 connected to the top of the box body 1, a discharge pipe 3 connected to the bottom, a valve connected to the discharge pipe 3, a fine grinding roller group is rotatably connected to the upper part of the box body 1, and the fine grinding roller group is driven by a first motor 5 fixedly connected to the outside of the box body 1 by bolts, and a connecting shaft 7 is rotatably connected to the middle of the fine grinding roller group in the box body 1, and a plurality of breaking pieces 8 are fixedly connected to the connecting shaft 7 by bolts at intervals. One end of the connecting shaft 7 is fixed to the outer wall of the box body 1 by bolts. The output shaft of the second motor 9 is fixedly connected to the outside of the box body 1. A sieve plate 10 is rotatably connected to the box body 1 below the connecting shaft 7 through a twisted shaft. The other end of the sieve plate 10 extends through the through hole opened in the box body 1 to its outside. The through hole has a large height, which can enable the sieve plate 10 to vibrate up and down. A collecting box 12 is provided outside the box body 1 below the outer end of the sieve plate 1. An eccentric wheel 11 is rotatably connected to the box body 1. The eccentric wheel 11 is transmission-connected to the connecting shaft 7 and contacts the lower surface of the sieve plate 10.

[0018] In order to achieve fine grinding by driving the two fine grinding rollers 4 to rotate through the first motor 5, the fine grinding roller group consists of two fine grinding rollers 4 that rotate relatively, and the fine grinding rollers 4 are rotatably connected to the box body 1 through roller shafts. One of the roller shafts at one end passes through the box body 1 and is fixedly connected to the output shaft of the first motor 5, and the two roller shafts at the other end pass through the box body 1 and are fixedly connected with mutually meshing gears 6.

[0019] In order to remove the oil-rich pulverized coal stuck to the fine grinding roller 4 and to facilitate adjustment of the distance between the cleaning brush 13 and the fine grinding roller 4 according to the cleaning situation, two sliding shafts 14 are slidably connected to each side of the housing 1. The two sliding shafts 14 on the same side are fixedly connected to the cleaning brush 13 at one end located inside the housing 1 and to the connecting plate 15 at the other end located outside the housing 1. Telescopic rods 16 are fixedly connected to each side of the housing 1, and the output ends of the telescopic rods 16 are fixedly connected to the connecting plates 15 via bolts. It should be noted that in this embodiment, an observation window is provided on one side of the housing 1 to facilitate observation of the cleanliness of the fine grinding roller 4. The telescopic rods 16 can be any of electric, hydraulic, or pneumatic. In this embodiment, electric telescopic rods are used.

[0020] In order to synchronously drive the eccentric wheel 11 to rotate and realize the vibration of the screen plate 10 through the second motor 9, a rotating shaft is rotatably connected in the box body 1, one end of the rotating shaft is fixedly connected to the eccentric wheel 11, and the other end is fixedly connected to the driven wheel 19. One end of the connecting shaft 7 is fixedly connected to the driving wheel 18, and the driving wheel 18 and the driven wheel 19 are connected by a belt 20. It should be noted that in this embodiment, the driving wheel 18 and the driven wheel 19 can also be connected by a chain transmission.

[0021] In order to play a buffering role and prevent the oil-rich pulverized coal from falling into the collection box 12 without being fully screened, improve the screening effect, and allow qualified materials to enter the bottom of the box 1, a plurality of arc-shaped protrusions 17 are fixedly connected to the screen plate 10 at intervals.

[0022] In order to allow the oil-rich pulverized coal to fall between the two fine grinding rollers 4 during feeding, guide plates 21 inclined toward the middle of the fine grinding roller group are fixedly connected to both sides of the feed hopper 2 in the box body 1.

[0023] The working process of this embodiment is as follows:

[0024] When it is necessary to finely grind and screen the oil-rich pulverized coal, the oil-rich pulverized coal is added to the box body 1 through the feed hopper 2. The oil-rich pulverized coal enters between the two fine grinding rollers 4 under the action of the guide plate 21, and the first motor 5 is started synchronously. The first motor 5 drives one fine grinding roller 4 to rotate, and drives the other fine grinding roller 4 to rotate relatively under the meshing action of the two gears 6. The two fine grinding rollers 4 finely grind the oil-rich pulverized coal, and the second motor 9 is started synchronously. The second motor 9 drives the connecting shaft 7 and the scattering piece 8 to rotate, and the finely ground oil-rich pulverized coal falls On the breaking piece 8, the oil-rich pulverized coal that sticks together can be broken up, and the broken oil-rich pulverized coal falls on the screen plate 10. The connecting shaft 7 drives the driving wheel 18 to rotate. The driving wheel 18 drives the driven wheel 19 to rotate under the action of the belt. The driven wheel 19 drives the rotating shaft and the eccentric wheel 11 at its end to rotate, thereby causing the screen plate 10 to shake up and down. During the shaking process of the screen plate 10, the pulverized coal that meets the specifications after fine grinding falls to the bottom of the box body 1. When it is necessary to discharge the material, the valve of the discharge pipe 3 is opened to discharge the material, and the material that does not meet the specifications enters the collection box 12. During the screening process, arc-shaped ridges 17 are fixedly connected to the screen plate 10 at intervals, which can play a certain blocking role, ensuring sufficient screening and preventing some qualified materials from failing to be fully screened and entering the collection box 12. During the fine grinding process, the cleaning brush 13 can brush off the oil-rich pulverized coal sticking to the fine grinding roller 4, and the distance between the cleaning brush 13 and the fine grinding roller 4 can be adjusted according to the degree of cleaning, and the telescopic rod 16 can be controlled to extend or contract, driving the connecting plate 15 and the sliding shaft 14 to extend and contract, thereby realizing the adjustment of the distance of the cleaning brush 13.

Claims

1. A fine grinding and screening device for oil-rich pulverized coal, comprising a housing (1), wherein the top of the housing (1) is connected to a feed hopper (2), and the bottom is connected to a discharge pipe (3), and the upper part of the housing (1) is rotatably connected to a fine grinding roller group, and the fine grinding roller group is driven by a first motor (5), characterized in that: A connecting shaft (7) is rotatably connected to the lower middle portion of the fine grinding roller group in the box body (1), and a plurality of scattering plates (8) are fixedly connected to the connecting shaft (7). One end of the connecting shaft (7) is fixedly connected to the output shaft of the second motor (9). A sieve plate (10) is rotatably connected to the lower portion of the connecting shaft (7) in the box body (1), and one end of the sieve plate (10) extends through a through hole provided in the box body (1) to the outside thereof. A collecting box (12) is provided outside the box body (1) below the sieve plate (10). An eccentric wheel (11) is rotatably connected to the box body (1), and the eccentric wheel (11) is transmission-connected to the connecting shaft (7). The eccentric wheel (11) contacts the lower surface of the sieve plate (10).

2. The fine grinding and screening equipment for oil-rich pulverized coal according to claim 1, characterized in that: The fine grinding roller group is composed of two relatively rotating fine grinding rollers (4), the fine grinding rollers (4) being rotationally connected to the housing (1) via roller shafts, one of the roller shafts at one end passing through the housing (1) and being fixedly connected to the output shaft of the first motor (5), and the two roller shafts at the other end passing through the housing (1) and being fixedly connected to mutually meshing gears (6).

3. The fine grinding and screening equipment for oil-rich pulverized coal according to claim 2, characterized in that: Sliding shafts (14) are slidably connected to both sides of the box (1); one end of the sliding shaft (14) located inside the box (1) is fixedly connected to a cleaning brush (13); and one end located outside the box (1) is fixedly connected to a connecting plate (15); telescopic rods (16) are fixedly connected to both sides of the box (1); and the output end of the telescopic rod (16) is fixedly connected to the connecting plate (15).

4. The fine grinding and screening equipment for oil-rich pulverized coal according to claim 1, characterized in that: A rotating shaft is rotatably connected in the box body (1), one end of the rotating shaft is fixedly connected to the eccentric wheel (11), and the other end is fixedly connected to the driven wheel (19), one end of the connecting shaft (7) is fixedly connected to the driving wheel (18), and the driving wheel (18) and the driven wheel (19) are connected by a belt (20).

5. The fine grinding and screening equipment for oil-rich pulverized coal according to claim 1, characterized in that: Arc-shaped convex strips (17) are fixedly connected to the sieve plate (10) at intervals.

6. The fine grinding and screening equipment for oil-rich pulverized coal according to claim 1, characterized in that: Guide plates (21) inclined toward the middle of the fine grinding roller group are fixedly connected to both sides of the feed hopper (2) in the box (1).

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