Raw coal processing device for thermal power plant

Abstract

The invention relates to the technical field of raw coal processing, in particular to a thermal power plant raw coal processing device which sequentially comprises a grinding bin, a screening bin, a drying bin and a collecting bin from top to bottom, raw coal enters the collecting bin after being smashed through the grinding bin, floated through the screening bin and dried through the drying bin, an adjusting device is arranged in the grinding bin, and the collecting bin is arranged in the collecting bin. The adjusting device is used for adjusting the position of the grinding roller, the grinding bin comprises a first shell, a first grinding roller, a second grinding roller and the adjusting device, an input port is formed in the top of the first shell, and the bottom of the first shell communicates with the screening bin and the drying bin through an output pipeline; the first grinding roller and the second grinding roller are arranged in the first shell side by side, the second grinding roller is connected with the adjusting device, and the adjusting device is used for adjusting the distance between the two grinding rollers, so that raw coal is crushed into coal briquettes with different sizes according to requirements.

Description

Technical Field

[0001] The invention relates to the technical field of raw coal processing, in particular to a raw coal processing device for a thermal power plant. Background Art

[0002] Raw coal is difficult to use directly due to its high moisture content, high ash content and low calorific value. It needs to be converted into clean, high calorific value coal-based products through pyrolysis to achieve efficient utilization of raw coal resources. Coal pyrolysis is a process technology that heats coal in an air-tight environment to produce pyrolysis gas, coke and other products by decomposing it under heat.

[0003] The Chinese invention patent with authorization announcement number CN113318849B, published on January 17, 2023, discloses a raw coal circulating screening and crushing device and screening and crushing method, which can avoid the problem of clogging the sieve holes due to excessive moisture content of the raw coal, and realizes the circulating screening and crushing of the raw coal, but the position of its tooth roller cannot be adjusted, and the raw coal cannot be crushed into coal blocks of different sizes according to demand. Summary of the invention

[0004] In view of the above technical problems, the present invention provides a raw coal processing device for a thermal power plant, which uses an adjusting device to adjust the distance between two grinding rollers so as to crush the raw coal into coal blocks of different sizes according to demand.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A raw coal processing device for a thermal power plant comprises a grinding bin, a screening bin, a drying bin and a collecting bin from top to bottom. The raw coal enters the collecting bin after being crushed by the grinding bin, floated by the screening bin and dried by the drying bin. The adjusting device is arranged inside the grinding bin and is used to adjust the position of the grinding roller.

[0007] Furthermore, the grinding bin includes a first shell, a first grinding roller, a second grinding roller and an adjusting device. An input port is provided at the top of the first shell, and the bottom of the first shell is connected to the screening bin and the drying bin through an output pipe; the first grinding roller and the second grinding roller are arranged side by side inside the first shell, and the second grinding roller is connected to the adjusting device.

[0008] Furthermore, the adjusting device includes a motor, a transmission rod, a threaded rod, a partition plate and a guide rod, wherein the partition plate is arranged on the outer periphery of the second grinding roller; connecting pieces are arranged at both ends of the second grinding roller; the motor output shaft is connected to the input end of the first steering gear, the output end of the first steering gear is connected to one end of the transmission rod, the other end of the transmission rod is connected to the input end of the second steering gear, the output end of the second steering gear is connected to one end of the threaded rod, the other end of the threaded rod is rotatably connected to the side wall of the partition plate after passing through the connecting piece, the threaded rod is threadedly connected to the connecting piece, and a strip hole is opened on the side wall of the partition plate; one end of the guide rod is fixed to the side wall of the partition plate, and the other end of the guide rod is fixed to the inner wall of the first shell after passing through the connecting piece; the motor and the second steering gear are fixed to the first shell.

[0009] Furthermore, the adjusting device also includes an avoidance device, which includes a connecting plate and a spring device, both ends of the connecting plate are slidably connected to the guide rod, one end of the connecting plate is fixed to the second steering gear, and the other end of the connecting plate is fixed to the motor, and the motor output shaft passes through the connecting plate and is connected to the input end of the first steering gear; one end of the spring device is fixed to the connecting plate, and the other end of the spring device is fixed to the side wall of the first shell.

[0010] Furthermore, there are multiple screening bins, including a second shell, a first pipe and a second pipe. The top of the second shell is connected to the first pipe, the bottom of the second shell is connected to the second pipe, and an electric control door is provided at the bottom of the second shell; pressure pumps are provided inside the first pipe and the second pipe; and flotation liquid is added inside the second shell.

[0011] Furthermore, the drying bin includes a third shell, a spray gun, a mesh frame and an arc frame. The third shell and the mesh frame are both truncated cone-shaped. The arc frame is fixed to the inner wall of the top of the third shell, the top of the mesh frame is fixed to the bottom of the arc frame, the bottom of the mesh frame is suspended, a rectangular hole is provided on the top of the mesh frame, the spray gun is spirally arranged on the side wall of the third shell, and the output end of the spray gun is opposite to the mesh frame; the bottom of the third shell is provided with a coal outlet connected to the collecting bin.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The present invention uses an adjusting device to adjust the distance between the two grinding rollers so as to crush the raw coal into coal blocks of different sizes according to demand.

[0014] 2. The position of the second grinding roller can be adjusted under the action of the adjusting device. When the position of the second grinding roller needs to be adjusted, the motor is started, and the motor drives the transmission rod through the first steering gear, and the transmission rod drives the threaded rod through the second steering gear, so that the threaded rod adjusts the position of the second grinding roller through the connecting piece.

[0015] 3. When a hard object appears and causes the first grinding roller and the second grinding roller to be stuck, the second grinding roller applies a rightward force to the threaded rod through the connecting piece, and the threaded rod compresses the spring device through the second deflector and the connecting plate.

[0016] 4. The coal blocks ground in the grinding bin fall into the internal mesh frame. The spirally rising part of the spray gun is on the outer periphery of the second shell. The spray gun blows hot air into the mesh frame to remove moisture from the coal blocks. The coal blocks become lighter after water removal and move upward under the blowing of the spray gun until they pass through the rectangular hole and fall into the collection bin. The arc frame can guide the coal blocks to the middle of the mesh frame when they fall. During the overshoot of the coal blocks rising, they can pass through the rectangular hole more easily under the guidance of the arc frame.

[0017] 5. Before crushing the raw coal, the composition of the raw coal should be tested first. Raw coal with different impurity contents will enter different screening bins after crushing. If the impurity content of the raw coal is low, it can also be directly discharged into the collection bin after crushing.

[0018] 6. According to different types of impurities, different screening bins add different flotation liquids through different pipes. For example, the weight of ore impurities is greater than that of raw coal, so the ore impurities are located at the bottom of the screening bin after flotation. At this time, it is necessary to use the second pipe to discharge the ore impurities and flotation liquid, and then release the raw coal after flotation into the drying bin; the weight of sulfide impurities is less than that of raw coal, so the sulfide impurities are located at the top of the screening bin after flotation. At this time, it is necessary to use the first pipe to discharge the sulfide impurities and flotation liquid, and then release the raw coal after flotation into the drying bin. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0021] Figure 3 Schematic diagram of the internal structure of the grinding chamber;

[0022] Figure 4 for Figure 3 Schematic diagram of the structure of the middle A area;

[0023] Figure 5 It is a schematic diagram of the structure of the spray gun.

[0024] The accompanying drawings are marked as:

[0025] 1. Grinding chamber; 11. First shell; 12. Input port; 13. First grinding roller; 14. Second grinding roller; 141. Connector; 15. Output pipeline; 16. Adjustment device; 161. Motor; 162. First diverter; 163. Transmission rod; 164. Second diverter; 165. Threaded rod; 166. Partition plate; 1661. Strip hole; 167. Connecting plate; 168. Spring device; 169. Guide rod; 2. Screening chamber; 21. Second shell; 22. First pipeline; 23. Second pipeline; 24. Pressure pump; 25. Flotation liquid; 3. Drying chamber; 31. Third shell; 32. Spray gun; 33. Mesh frame; 34. Rectangular hole; 35. Arc frame; 36. Coal outlet; 4. Collecting chamber. DETAILED DESCRIPTION

[0026] See also Figure 1-Figure 5 The raw coal processing device for a thermal power plant in this embodiment includes a grinding bin 1, a screening bin 2, a drying bin 3 and a collecting bin 4 from top to bottom. The raw coal enters the collecting bin 4 after being crushed in the grinding bin 1, floated in the screening bin 2 and dried in the drying bin 3. An adjusting device 16 is provided inside the grinding bin 1, and the adjusting device 16 is used to adjust the position of the grinding roller.

[0027] The present invention uses an adjusting device 16 to adjust the distance between the two grinding rollers so as to break the raw coal into coal blocks of different sizes according to demand.

[0028] Furthermore, the grinding bin 1 includes a first shell 11, a first grinding roller 13, a second grinding roller 14 and an adjusting device 16. An input port 12 is provided at the top of the first shell 11, and the bottom of the first shell 11 is connected to the screening bin 2 and the drying bin 3 through an output pipe 15; the first grinding roller 13 and the second grinding roller 14 are arranged in parallel inside the first shell 11, and the second grinding roller 14 is connected to the adjusting device 16.

[0029] Furthermore, the adjusting device 16 includes a motor 161, a transmission rod 163, a threaded rod 165, a partition plate 166 and a guide rod 169, wherein the partition plate 166 is arranged on the outer periphery of the second grinding roller 14; a connecting piece 141 is arranged at both ends of the second grinding roller 14; the output shaft of the motor 161 is connected to the input end of the first steering gear 162, the output end of the first steering gear 162 is connected to one end of the transmission rod 163, the other end of the transmission rod 163 is connected to the input end of the second steering gear 164, and the second steering gear 1 The output end 64 is connected to one end of the threaded rod 165, and the other end of the threaded rod 165 is rotatably connected to the side wall of the partition plate 166 after passing through the connecting piece 141. The threaded rod 165 is threadedly connected to the connecting piece 141, and a strip hole 1661 is provided on the side wall of the partition plate 166; one end of the guide rod 169 is fixed to the side wall of the partition plate 166, and the other end of the guide rod 169 passes through the connecting piece 141 and is fixed to the inner wall of the first shell 11; the motor 161 and the second diverter 164 are fixed to the first shell 11.

[0030] The position of the second grinding roller 14 can be adjusted under the action of the adjusting device 16. When the position of the second grinding roller 14 needs to be adjusted, the motor 161 is started, and the motor 161 drives the transmission rod 163 through the first diverter 162. The transmission rod 163 drives the threaded rod 165 through the second diverter 164, so that the threaded rod 165 adjusts the position of the second grinding roller 14 through the connecting piece 141.

[0031] Furthermore, the adjustment device 16 also includes an avoidance device, which includes a connecting plate 167 and a spring device 168. Both ends of the connecting plate 167 are slidably connected to the guide rod 169, one end of the connecting plate 167 is fixed to the second diverter 164, and the other end of the connecting plate 167 is fixed to the motor 161. The output shaft of the motor 161 passes through the connecting plate 167 and is connected to the input end of the first diverter 162; one end of the spring device 168 is fixed to the connecting plate 167, and the other end of the spring device 168 is fixed to the side wall of the first shell 11.

[0032] When a hard object appears and causes the first grinding roller 13 and the second grinding roller 14 to be stuck, the second grinding roller 14 applies a rightward force to the threaded rod 165 through the connecting piece 141 , and the threaded rod 165 presses the spring device 168 through the second deflector 164 and the connecting plate 167 .

[0033] Furthermore, multiple screening bins 2 are provided, and the screening bin 2 includes a second shell 21, a first pipe 22 and a second pipe 23. The top of the second shell 21 is connected to the first pipe 22, and the bottom of the second shell 21 is connected to the second pipe 23. An electric-controlled door is provided at the bottom of the second shell 21; pressure pumps 24 are provided inside the first pipe 22 and the second pipe 23; and flotation liquid 25 is added inside the second shell 21.

[0034] The quality of raw coal from different regions and coal seams varies greatly. It has multiple components and physical properties, and contains impurities (such as soil, ore, sulfide) of different types and proportions. The composition of the raw coal is tested before crushing. Raw coal with different impurity contents enters different screening bins 2 after crushing. If the raw coal has a low impurity content, it can also be directly discharged into the collection bin 4 after crushing.

[0035] According to different impurity categories, different flotation liquids 25 are added to different screening bins 2 through different pipes. For example, the weight of ore impurities is greater than that of raw coal, so the ore impurities are located at the bottom of the screening bin 2 after flotation. At this time, it is necessary to first use the second pipe 23 to discharge the ore impurities and the flotation liquid 25, and then release the raw coal after flotation into the drying bin 3; the weight of sulfide impurities is less than that of raw coal, so the sulfide impurities are located at the top of the screening bin 2 after flotation. At this time, it is necessary to first use the first pipe 22 to discharge the sulfide impurities and the flotation liquid 25, and then release the raw coal after flotation into the drying bin 3.

[0036] Furthermore, the drying bin 3 includes a third shell 31, a spray gun 32, a mesh frame 33 and an arc frame 35. The third shell 31 and the mesh frame 33 are both truncated cone-shaped. The arc frame 35 is fixed to the inner wall of the top of the third shell 31. The top of the mesh frame 33 is fixed to the bottom of the arc frame 35. The bottom of the mesh frame 33 is suspended. A rectangular hole 34 is provided at the top of the mesh frame 33. The spray gun 32 is spirally arranged on the side wall of the third shell 31, and the output end of the spray gun 32 is opposite to the mesh frame 33. A coal outlet 36 connected to the collecting bin 4 is provided at the bottom of the third shell 31.

[0037] The ground coal blocks in the grinding bin 1 fall into the internal mesh frame 33, and the spirally rising portion of the spray gun 32 is located on the outer periphery of the third shell 31. The spray gun 32 blows hot air into the mesh frame 33 to remove moisture from the coal blocks. The coal blocks become lighter after dehydration and move upward under the blowing of the spray gun 32 until they pass through the rectangular hole 34 and fall into the collecting bin 4. The arc frame 35 can guide the coal blocks to the middle of the mesh frame 33 when the coal blocks fall. During the overshoot of the rising coal blocks, they can pass through the rectangular hole 34 more easily under the guidance of the arc frame 35.

[0038] The working principle of the present invention is:

[0039] Before crushing the raw coal, the composition of the raw coal is tested. Raw coal with different impurity contents enters different screening bins 2 after crushing. If the raw coal has less impurity content, it can also be directly discharged into the collection bin 4 after crushing.

[0040] The position of the second grinding roller 14 can be adjusted under the action of the adjusting device 16. When the position of the second grinding roller 14 needs to be adjusted, the motor 161 is started, and the motor 161 drives the transmission rod 163 through the first diverter 162. The transmission rod 163 drives the threaded rod 165 through the second diverter 164, so that the threaded rod 165 adjusts the position of the second grinding roller 14 through the connecting piece 141. When a hard object appears and causes the first grinding roller 13 and the second grinding roller 14 to be stuck, the second grinding roller 14 applies a rightward force to the threaded rod 165 through the connecting piece 141, and the threaded rod 165 squeezes the spring device 168 through the second diverter 164 and the connecting plate 167.

[0041] The ground coal blocks in the grinding bin 1 fall into the internal mesh frame 33, and the spirally rising portion of the spray gun 32 is located on the outer periphery of the third shell 31. The spray gun 32 blows hot air into the mesh frame 33 to remove moisture from the coal blocks. The coal blocks become lighter after dehydration and move upward under the blowing of the spray gun 32 until they pass through the rectangular hole 34 and fall into the collecting bin 4. The arc frame 35 can guide the coal blocks to the middle of the mesh frame 33 when the coal blocks fall. During the overshoot of the rising coal blocks, they can pass through the rectangular hole 34 more easily under the guidance of the arc frame 35.

[0042] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A raw coal processing device for a thermal power plant, comprising, from top to bottom, a grinding bin (1), a screening bin (2), a drying bin (3) and a collecting bin (4), wherein the raw coal is crushed in the grinding bin (1), floated in the screening bin (2), dried in the drying bin (3) and then enters the collecting bin (4), characterized in that: The adjusting device (16) is arranged inside the grinding chamber (1), and the adjusting device (16) is used to adjust the position of the grinding roller.

2. A raw coal processing device for a thermal power plant according to claim 1, characterized in that: The grinding chamber (1) comprises a first shell (11), a first grinding roller (13), a second grinding roller (14) and an adjusting device (16); an input port (12) is provided at the top of the first shell (11); the bottom of the first shell (11) is connected to the screening chamber (2) and the drying chamber (3) via an output pipe (15); the first grinding roller (13) and the second grinding roller (14) are arranged side by side inside the first shell (11); and the second grinding roller (14) is connected to the adjusting device (16).

3. A raw coal processing device for a thermal power plant according to claim 1, characterized in that: The adjusting device (16) comprises a motor (161), a transmission rod (163), a threaded rod (165), a partition plate (166) and a guide rod (169); the partition plate (166) is arranged on the outer periphery of the second grinding roller (14); connecting members (141) are arranged at both ends of the second grinding roller (14); the output shaft of the motor (161) is connected to the input end of the first steering gear (162); the output end of the first steering gear (162) is connected to one end of the transmission rod (163); the other end of the transmission rod (163) is connected to the input end of the second steering gear (164); the output end of the second steering gear (164) is connected to the input end of the second steering gear (164); The first shell (11) is provided with a second steering gear (164) and a second steering gear (165) connected to one end of the threaded rod (165); the other end of the threaded rod (165) is rotatably connected to the side wall of the partition plate (166) after passing through the connecting piece (141); the threaded rod (165) is threadedly connected to the connecting piece (141); and a strip hole (1661) is provided on the side wall of the partition plate (166); one end of the guide rod (169) is fixed to the side wall of the partition plate (166); the other end of the guide rod (169) passes through the connecting piece (141) and is fixed to the inner wall of the first shell (11); the motor (161) and the second steering gear (164) are fixed to the first shell (11).

4. A raw coal processing device for a thermal power plant according to claim 3, characterized in that: The adjusting device (16) also includes an avoidance device, which includes a connecting plate (167) and a spring device (168). Both ends of the connecting plate (167) are slidably connected to the guide rod (169). One end of the connecting plate (167) is fixed to the second steering gear (164), and the other end of the connecting plate (167) is fixed to the motor (161). The output shaft of the motor (161) passes through the connecting plate (167) and is connected to the input end of the first steering gear (162). One end of the spring device (168) is fixed to the connecting plate (167), and the other end of the spring device (168) is fixed to the side wall of the first shell (11).

5. The raw coal processing device for a thermal power plant according to claim 1, characterized in that: The screening chamber (2) is provided with a plurality of them, and the screening chamber (2) comprises a second shell (21), a first pipe (22) and a second pipe (23); the top of the second shell (21) is connected to the first pipe (22), the bottom of the second shell (21) is connected to the second pipe (23), and an electric control door is provided at the bottom of the second shell (21); pressure pumps (24) are provided inside the first pipe (22) and the second pipe (23); and flotation liquid (25) is added inside the second shell (21).

6. The raw coal processing device for a thermal power plant according to claim 1, characterized in that: The drying bin (3) comprises a third shell (31), a spray gun (32), a mesh frame (33) and an arc frame (35). The third shell (31) and the mesh frame (33) are both truncated cone-shaped. The arc frame (35) is fixed to the inner wall of the top of the third shell (31). The top of the mesh frame (33) is fixed to the bottom of the arc frame (35). The bottom of the mesh frame (33) is suspended in the air. A rectangular hole (34) is provided at the top of the mesh frame (33). The spray gun (32) is spirally arranged on the side wall of the third shell (31). The output end of the spray gun (32) is directly opposite to the mesh frame (33). The bottom of the third shell (31) is provided with a coal outlet (36) connected to the collecting bin (4).

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