Coal drying method

Abstract

The invention discloses a coal drying method, which relates to the technical field of coal pretreatment, and comprises the following steps: step 1, blanking: feeding coal wetted by water into a device; step 2, stirring: stirring the coal which is put into the device and wetted by water, the device comprising a drying box body, a motor driving rod rotatably connected to the inside of the drying box body, an outer rod fixedly connected to the outer side wall of the motor driving rod, and a throwing shovel rotatably connected to one end, away from the motor driving rod, of the outer rod, coal accumulated at the bottom in the drying box body can be thrown up, so that the coal can be in full contact with hot air; step 3, crushing: selecting coal, and crushing the coal; the technical problems that when coal is dried, the coal can be accumulated in the device, hot air can be accumulated on the upper portion in the device, and the coal at the bottom of a coal pile is difficult to make contact with the hot air, so that the drying operation efficiency becomes low are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of coal pretreatment, and specifically to a coal drying method. Background Art

[0002] As one of the most important energy resources in the world, coal occupies an important position in the energy structure. However, coal often contains a relatively high moisture content during the processes of mining, storage, transportation, and use. These moisture contents not only reduce the combustion efficiency of coal, increase the transportation cost, but also may have an adverse impact on the environment and production equipment. Therefore, coal drying technology has emerged as an important link in the field of coal processing and utilization. The basic principle of coal drying is to provide heat to heat and evaporate the moisture in the coal. In this process, the drying equipment will use hot air, hot wind, or other heat sources to heat the coal, so that the moisture in the coal gradually evaporates and is discharged. As the moisture continuously decreases, the combustion efficiency and quality of the coal will correspondingly increase.

[0003] After retrieval, the patent document (the authorized announcement number is CN219531466U) includes a base, the middle of the upper surface of the base is fixedly connected with three base components, an outer tank is rotatably connected inside the base component, one end of the outer tank is fixedly connected with a rear end cover, a discharge pipe is fixedly connected to the bottom of one side of the rear end cover, the other end of the outer tank is rotatably connected with a front end cover, a stirring component is rotatably connected to the middle of one side of the front end cover and the rear end cover, annular grooves are respectively opened on one side, the middle, and the other side of the inner wall of the outer tank, and a wind guiding component is rotatably connected inside the annular groove. Through the setting of the wind guiding component and the hot air blower, when drying the coal, the hot air blower is started, and the hot air generated by it enters the air outlet pipe through the air guiding pipe and enters the inside of the outer tank through the air outlet, so that the inside of the outer tank is filled with hot air, and the drying efficiency of the coal is higher.

[0004] However, the above device still has deficiencies:

[0005] 1. When drying the coal, it will accumulate inside the device, and the hot air will accumulate above the device. It is difficult for the coal at the bottom of the coal pile to come into contact with the hot air, resulting in a low drying operation efficiency.

[0006] 2. The volume of some coal is large, and the thermal effect it receives from the hot air will become lower, resulting in a longer drying time, thus making the overall working time of drying longer and reducing the drying efficiency. Summary of the Invention

[0007] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention proposes a coal drying method, which solves the problem that when drying coal, it will accumulate inside the device, hot air will accumulate above the device, and the coal at the bottom of the coal pile is difficult to contact the hot air, thus reducing the drying operation efficiency.

[0008] To achieve the above object, the present invention proposes a coal drying method, comprising the following steps:

[0009] Step 1, feeding: putting the water-soaked coal into the device;

[0010] Step 2, stirring: stirring the water-soaked coal put into the device. The device includes a drying box body, and a motor driving rod is rotatably connected inside the drying box body. An outer rod is fixedly connected to the outer side wall of the motor driving rod. One end of the outer rod away from the motor driving rod is rotatably connected to a throwing shovel. By the movement of the throwing shovel, the coal accumulated at the bottom inside the drying box body can be thrown up, so that it can fully contact the hot air.

[0011] Step 3, crushing: selecting coal and performing a crushing operation on it;

[0012] Step 4, drying: introducing hot air into the device, and the hot air directly contacts the water-soaked coal, thereby realizing drying;

[0013] Step 5, discharging: discharging the coal dried in the device.

[0014] Preferably, a plurality of bottom brackets are fixedly connected to the bottom of the drying box body.

[0015] Preferably, a feed inlet is fixedly connected to the top of the drying box body, and a discharge outlet is fixedly connected to the side wall of the drying box body away from the feed inlet.

[0016] Preferably, a throwing and crushing assembly is arranged inside the drying box body. The throwing and crushing assembly includes crushing teeth, and the crushing teeth are fixedly connected to the inner side wall of the drying box body. A plurality of meshing teeth are engraved on the bottom of the throwing shovel. An empty cavity is formed on one side of the plurality of meshing teeth close to each other. A plurality of elastic springs are arranged inside the empty cavity. A trapezoidal plate is slidably connected inside the empty cavity. The two ends of the elastic spring are respectively fixedly connected to the trapezoidal plate and the meshing teeth. The top of the trapezoidal plate is an inclined surface. When the throwing shovel passes through the bottom of the drying box body under the drive of the motor driving rod, a lot of coal will accumulate inside it. As the motor driving rod continues to move, the meshing teeth will contact the crushing teeth, and the crushing teeth will squeeze into the gap between the meshing teeth, thereby pressing and crushing the coal inside the throwing shovel, and the trapezoidal plate will retract into the meshing teeth under the extrusion of the crushing teeth.

[0017] Preferably, one side wall of the drying box body is fixedly connected with a hot air box body, and the other side of the drying box body is fixedly connected with a driving motor. The motor driving rod is rotatably connected inside the driving motor. A hot air pipeline is fixedly connected inside the hot air box body. The hot air pipeline is inserted into the motor driving rod. A plurality of first air holes are formed in the side wall of the hot air pipeline. A rotating disc is arranged outside the hot air pipeline. A second ventilation hole is formed inside the rotating disc. One side of the rotating disc away from the hot air pipeline is fixedly connected with a driving rod. A third ventilation hole is formed inside the driving rod. One end of the driving rod away from the hot air pipeline penetrates through the side wall of the motor driving rod and extends to the outside thereof. One end of the driving rod extending to the outside of the motor driving rod is fixedly connected to a throwing shovel. When the hot air box body injects hot air into the drying box body, the coal at the bottom of the treated coal pile can contact the least hot air. When the throwing shovel scoops up the coal at the bottom, the hot air discharged from the first air holes can directly contact the coal in the throwing shovel, so that it can be better dried.

[0018] Preferably, an auxiliary component is arranged inside the drying box body. The auxiliary component includes a semi-circular tooth. The semi-circular tooth is engraved on the outer side wall of the hot air pipeline. The semi-circular tooth is semi-circular and is arranged above the hot air pipeline. A driven tooth is engraved on one side of the rotating disc close to the hot air pipeline. The driven tooth meshes with the semi-circular tooth. When the throwing shovel moves from the bottom of the drying box body to contact the crushing tooth, it will move upward. At this time, the semi-circular tooth and the driven tooth mesh with each other, and the rotating disc will rotate. Driven by the rotating disc, the driving rod drives the throwing shovel to rotate. At this time, the coal in the throwing shovel will also shake with the rotation of the throwing shovel, so that it can be better dried by the hot air.

[0019] Preferably, a rotating shaft is arranged inside the throwing shovel. The rotating shaft is rotatably connected to the inner side wall of the throwing shovel. The rotating shaft is communicated with the driving rod. A telescopic rod is fixedly connected to the side wall of the rotating shaft. One end of the telescopic rod away from the rotating shaft is fixedly connected to an outer soft plate. An inner soft plate is inserted into the outer soft plate. An arc-shaped track is engraved on the inner side wall of the throwing shovel. The inner soft plate fits on the track. When the throwing shovel moves upward, the rotating shaft rotates driven by the motor set at a fixed time, so as to drive the outer soft plate to seal the top of the throwing shovel, thus preventing the coal from falling out of the throwing shovel.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. When the throwing shovel passes through the bottom of the drying box body driven by the motor driving rod, a lot of coal will be accumulated in it. As the motor driving rod continues to move, the meshing teeth will contact the crushing teeth, and the crushing teeth will squeeze into the gap between the meshing teeth, so as to compress and crush the coal in the throwing shovel, and the trapezoidal plate will retract into the meshing teeth under the extrusion of the crushing teeth.

[0022] The surface area of the pulverized coal particles increases, which is more conducive to full contact with the hot air in the drying box body, thereby accelerating the drying process and improving the drying efficiency. The uniformity of the coal particles is significantly improved during the pulverization process. Larger coal particles are pulverized into smaller particles, reducing the problems of insufficient or uneven drying caused by uneven particle sizes. This makes the quality of the dried coal more stable and the moisture content lower, achieving a better drying effect.

[0023] 2. When the hot air box body injects hot air into the drying box body, the coal at the bottom of the treated coal pile can contact the least amount of hot air. When the lifting shovel scoops up the coal at the bottom, the hot air discharged from the first ventilation holes can directly contact the coal in the lifting shovel, enabling it to be better dried. When the lifting shovel moves from the bottom of the drying box body to contact the pulverizing teeth and then moves upward, the half-circle teeth and the driven teeth mesh with each other, and the rotating disc will rotate. Driven by the rotating disc, the driving rod drives the lifting shovel to rotate. At this time, the coal in the lifting shovel will also shake with the rotation of the lifting shovel, so that it can be better dried by the hot air.

[0024] The design of the lifting shovel can regularly scoop up the coal at the bottom, directly exposing it to the hot air discharged from the first ventilation holes, thereby ensuring that every part of the coal can be evenly dried and improving the drying effect. When the lifting shovel scoops up the coal and moves upward, it not only increases the contact area between the coal and the hot air, but also makes the coal particles shake in the lifting shovel through its rotation, further increasing the contact opportunity and contact time between the coal and the hot air. This dynamic drying method can more effectively remove the moisture in the coal than static drying, improving the drying efficiency. Secondly, the movement and rotation of the lifting shovel help to break the static structure inside the coal pile, reduce the accumulation and compaction between coal particles, thereby improving the hot air circulation in the drying box body. The hot air can penetrate the coal pile more smoothly, making the heat distribution more uniform and avoiding the phenomenon of local overheating or overcooling.

[0025] 3. When the lifting shovel moves upward, the rotating shaft rotates driven by a motor set at a fixed time, thereby driving the outer soft plate to seal the top of the lifting shovel, thus preventing the coal from falling out of the lifting shovel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0027] Figure 2 is an internal structural schematic diagram of the present invention;

[0028] Figure 3 is a structural schematic diagram of the pulverizing teeth of the present invention;

[0029] Figure 4 Internal structure schematic diagram of the throwing shovel of the present invention;

[0030] Figure 5 Structural schematic diagram of the throwing and crushing assembly of the present invention;

[0031] Figure 6 Cross-sectional structure schematic diagram of the motor drive rod of the present invention.

[0032] In the figure: 1, drying box body; 101, feed inlet; 102, discharge outlet; 2, bottom bracket; 3, drive motor; 31, motor drive rod; 4, throwing and crushing assembly; 41, outer rod; 42, throwing shovel; 43, crushing teeth; 44, meshing teeth; 45, empty bin; 46, elastic spring; 47, trapezoidal plate; 5, hot air box body; 51, hot air pipeline; 52, first ventilation hole; 53, second ventilation hole; 54, third ventilation hole; 6, auxiliary assembly; 61, semi-circular teeth; 62, rotating disc; 63, driven teeth; 64, drive rod; 7, rotating shaft; 71, telescopic rod; 72, outer soft plate; 721, inner soft plate; 73, track. Specific embodiments

[0033] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] As Figure 1-6 shown, a coal drying method includes the following steps:

[0035] Step 1, feeding: Put the water-soaked coal into the device;

[0036] Step 2, stirring: Stir the water-soaked coal put into the device. The device includes a drying box body 1. The inside of the drying box body 1 is rotatably connected with a motor drive rod 31. The outer side wall of the motor drive rod 31 is fixedly connected with an outer rod 41. One end of the outer rod 41 away from the motor drive rod 31 is rotatably connected with a throwing shovel 42. By the movement of the throwing shovel 42, the coal accumulated at the bottom in the drying box body 1 can be thrown up, so that it can fully contact with the hot air;

[0037] Step 3, crushing: Select coal and perform a crushing operation on it;

[0038] Step 4, drying: Pass hot air into the device, and the hot air directly contacts the water-soaked coal, thereby realizing drying;

[0039] Step 5, discharging: Discharge the coal dried in the device.

[0040] A plurality of bottom brackets 2 are fixedly connected to the bottom of the drying box body 1.

[0041] A feed inlet 101 is fixedly connected to the top of the drying box body 1, and a discharge outlet 102 is fixedly connected to the side wall of the drying box body 1 away from the feed inlet 101.

[0042] A throwing and crushing assembly 4 is arranged inside the drying box body 1. The throwing and crushing assembly 4 includes crushing teeth 43 which are fixedly connected to the inner side wall of the drying box body 1. A plurality of meshing teeth 44 are engraved on the bottom of the throwing shovel 42. An empty cavity 45 is formed on one side of the plurality of meshing teeth 44 close to each other. A plurality of elastic springs 46 are arranged inside the empty cavity 45. A trapezoidal plate 47 is slidably connected inside the empty cavity 45. The two ends of the elastic spring 46 are respectively fixedly connected to the trapezoidal plate 47 and the meshing teeth 44. The top of the trapezoidal plate 47 is an inclined surface. When the throwing shovel 42 passes through the bottom of the drying box body 1 driven by the motor driving rod 31, a lot of coal will be accumulated inside it. As the motor driving rod 31 continues to move, the meshing teeth 44 will contact the crushing teeth 43, and the crushing teeth 43 will squeeze into the gap between the meshing teeth 44, so as to compress and crush the coal inside the throwing shovel 42, and the trapezoidal plate 47 will retract into the meshing teeth 44 under the extrusion of the crushing teeth 43.

[0043] The surface area of the crushed coal particles increases, which is more conducive to full contact with the hot air in the drying box body 1, thereby accelerating the drying process and improving the drying efficiency. The uniformity of the coal particles is significantly improved during the crushing process. Larger coal particles are crushed into smaller particles, reducing the problems of insufficient drying or uneven drying caused by uneven particle sizes. This makes the quality of the dried coal more stable and the moisture content lower, achieving a better drying effect.

[0044] One side wall of the drying box body 1 is fixedly connected with a hot air box body 5, and the other side of the drying box body 1 is fixedly connected with a driving motor 3. The motor driving rod 31 is rotatably connected inside the driving motor 3. A hot air duct 51 is fixedly connected inside the hot air box body 5. The hot air duct 51 is inserted into the motor driving rod 31. A plurality of first air holes 52 are formed in the side wall of the hot air duct 51. A rotating disc 62 is arranged outside the hot air duct 51. A second ventilation hole 53 is formed inside the rotating disc 62. A driving rod 64 is fixedly connected to the side of the rotating disc 62 away from the hot air duct 51. A third ventilation hole 54 is formed inside the driving rod 64. One end of the driving rod 64 away from the hot air duct 51 penetrates through the side wall of the motor driving rod 31 and extends to the outside thereof. The end of the driving rod 64 extending to the outside of the motor driving rod 31 is fixedly connected to the lifting shovel 42. When the hot air box body 5 injects hot air into the drying box body 1, the coal at the bottom of the processed coal pile can contact the least amount of hot air. When the lifting shovel 42 scoops up the coal at the bottom, the hot air discharged from the first air holes 52 can directly contact the coal in the lifting shovel 42, so that it can be better dried.

[0045] An auxiliary component 6 is arranged inside the drying box body 1. The auxiliary component 6 includes a semi-circular tooth 61. The semi-circular tooth 61 is engraved on the outer side wall of the hot air duct 51. The semi-circular tooth 61 is semi-circular and is arranged above the hot air duct 51. A driven tooth 63 is engraved on the side of the rotating disc 62 close to the hot air duct 51. The driven tooth 63 meshes with the semi-circular tooth 61. When the lifting shovel 42 moves from the bottom of the drying box body 1 to contact the crushing teeth 43 and then moves to the upper part, at this time, the semi-circular tooth 61 and the driven tooth 63 mesh with each other, and the rotating disc 62 will rotate. Driven by the rotating disc 62, the driving rod 64 drives the lifting shovel 42 to rotate. At this time, the coal in the lifting shovel 42 will also shake with the rotation of the lifting shovel 42, so that it can be better dried by the hot air.

[0046] The design of the lifting shovel 42 can regularly scoop up the coal at the bottom, making it directly exposed to the hot air discharged from the first air holes 52, thereby ensuring that each part of the coal can be evenly dried, improving the drying effect. When the lifting shovel 42 scoops up the coal and moves to the upper part, it not only increases the contact area between the coal and the hot air, but also makes the coal particles shake in the lifting shovel 42 through its rotation, further increasing the contact opportunity and contact time between the coal and the hot air. This dynamic drying method can more effectively remove the moisture in the coal than static drying, improving the drying efficiency. Secondly, the movement and rotation of the lifting shovel 42 help to break the static structure inside the coal pile, reduce the accumulation and compaction between coal particles, thereby improving the hot air fluidity in the drying box body. The hot air can penetrate the coal pile more smoothly, making the heat distribution more uniform, and avoiding the phenomenon of local overheating or overcooling.

[0047] Inside the coal shoveling scoop 42, there is a rotating shaft 7. The rotating shaft 7 is rotatably connected to the inner side wall of the coal shoveling scoop 42. The rotating shaft 7 is connected to the driving rod 64. A telescopic rod 71 is fixedly connected to the side wall of the rotating shaft 7. One end of the telescopic rod 71 away from the rotating shaft 7 is fixedly connected to an outer soft plate 72. An inner soft plate 721 is inserted into the outer soft plate 72. An arc-shaped track 73 is engraved on the inner side wall of the coal shoveling scoop 42. The inner soft plate 721 fits on the track 73. The rotating shaft 7 is externally connected to a timing motor, and the motor will start under the set program. When the coal shoveling scoop 42 moves to the upper side, the rotating shaft 7 rotates driven by the motor with a set time, so as to drive the outer soft plate 72 to seal the top of the coal shoveling scoop 42, thus preventing the coal from falling out of the coal shoveling scoop 42.

[0048] Working principle: After putting coal into the drying box body 1, the coal shoveling scoop 42 accumulates a lot of coal inside after passing through the bottom of the drying box body 1 driven by the motor driving rod 31. As the motor driving rod 31 continues to move, the meshing teeth 44 will contact the crushing teeth 43, and the crushing teeth 43 will squeeze into the gap between the meshing teeth 44, so as to compress and crush the coal in the coal shoveling scoop 42, and the trapezoidal plate 47 will retract into the meshing teeth 44 under the extrusion of the crushing teeth 43.

[0049] When the hot air box body 5 injects hot air into the drying box body 1, the coal at the bottom of the processed coal pile can contact the least amount of hot air. When the coal shoveling scoop 42 scoops up the coal at the bottom, the hot air discharged from the first air vent 52 can directly contact the coal in the coal shoveling scoop 42, so that it can be better dried. After the coal shoveling scoop 42 moves from the bottom of the drying box body 1 to contact the crushing teeth 43, it will move to the upper side. At this time, the semi-circular teeth 61 and the driven teeth 63 mesh with each other, and the rotating disc 62 will rotate. Driven by the rotating disc 62, the driving rod 64 drives the coal shoveling scoop 42 to rotate. At this time, the coal in the coal shoveling scoop 42 will also shake with the rotation of the coal shoveling scoop 42, so that it can be better dried by the hot air.

[0050] When the coal shoveling scoop 42 moves to the upper side, the rotating shaft 7 rotates driven by the motor with a set time, so as to drive the outer soft plate 72 to seal the top of the coal shoveling scoop 42, thus preventing the coal from falling out of the coal shoveling scoop 42.

[0051] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical method of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A coal drying method, characterized in that, It includes the following steps: Step 1, blanking: Put the coal soaked in water into the device; Step 2, stirring: Stir the coal soaked in water put into the device. The device includes a drying box body (1). A motor driving rod (31) is rotatably connected inside the drying box body (1). An outer rod (41) is fixedly connected to the outer side wall of the motor driving rod (31). One end of the outer rod (41) away from the motor driving rod (31) is rotatably connected to a throwing shovel (42). By the movement of the throwing shovel (42), the coal accumulated at the bottom in the drying box body (1) can be thrown up, so that it can fully contact with the hot air; Step 3, crushing: Select coal and perform a crushing operation on it; Step 4, drying: Pass hot air into the device, and the hot air directly contacts the coal soaked in water, so as to achieve drying; Step 5, discharging: Discharge the coal dried in the device.

2. The coal drying method according to claim 1, characterized in that, A plurality of bottom brackets (2) are fixedly connected to the bottom of the drying box body (1).

3. The coal drying method according to claim 2, wherein, A feed inlet (101) is fixedly connected to the top of the drying box body (1), and a discharge outlet (102) is fixedly connected to the side wall of the drying box body (1) away from the feed inlet (101).

4. A coal drying method according to claim 1, characterized in that, A throwing and crushing assembly (4) is arranged inside the drying box body (1). The throwing and crushing assembly (4) includes crushing teeth (43). The crushing teeth (43) are fixedly connected to the inner side wall of the drying box body (1). A plurality of meshing teeth (44) are engraved on the bottom of the throwing shovel (42). A cavity (45) is formed on one side of the plurality of meshing teeth (44) close to each other. A plurality of elastic springs (46) are arranged inside the cavity (45). A trapezoidal plate (47) is slidably connected inside the cavity (45). The two ends of the elastic spring (46) are respectively fixedly connected to the trapezoidal plate (47) and the meshing teeth (44). The top of the trapezoidal plate (47) is an inclined surface. When the throwing shovel (42) passes through the bottom of the drying box body (1) driven by the motor driving rod (31), a lot of coal will be accumulated inside it. As the motor driving rod (31) continues to move, the meshing teeth (44) will contact the crushing teeth (43), and the crushing teeth (43) will squeeze into the gap between the meshing teeth (44), so as to compress and crush the coal inside the throwing shovel (42), and the trapezoidal plate (47) will retract into the meshing teeth (44) under the extrusion of the crushing teeth (43).

5. A coal drying method according to claim 4, characterized in that, One side wall of the drying box body (1) is fixedly connected with a hot air box body (5), the other side of the drying box body (1) is fixedly connected with a driving motor (3), the motor driving rod (31) is rotatably connected inside the driving motor (3), a hot air duct (51) is fixedly connected inside the hot air box body (5), the hot air duct (51) is inserted into the motor driving rod (31), a plurality of first ventilation holes (52) are formed in the side wall of the hot air duct (51), a rotating disc (62) is arranged outside the hot air duct (51), a second ventilation hole (53) is formed inside the rotating disc (62), a driving rod (64) is fixedly connected to the side of the rotating disc (62) away from the hot air duct (51), a third ventilation hole (54) is formed inside the driving rod (64), one end of the driving rod (64) away from the hot air duct (51) penetrates through the side wall of the motor driving rod (31) and extends to the outside thereof, and one end of the driving rod (64) extending to the outside of the motor driving rod (31) is fixedly connected to a lifting shovel (42). When the hot air box body (5) injects hot air into the drying box body (1), the coal at the bottom of the processed coal pile can contact the least amount of hot air. When the lifting shovel (42) scoops up the coal at the bottom, the hot air discharged from the first ventilation holes (52) can directly contact the coal in the lifting shovel (42), so that it can be better dried.

6. A coal drying method according to claim 5, characterized in that, An auxiliary component (6) is arranged inside the drying box body (1). The auxiliary component (6) includes a semi-circular tooth (61) engraved on the outer side wall of the hot air duct (51). The semi-circular tooth (61) is semi-circular and arranged above the hot air duct (51). A driven tooth (63) is engraved on the side of the rotating disc (62) close to the hot air duct (51). The driven tooth (63) meshes with the semi-circular tooth (61). When the lifting shovel (42) moves from the bottom of the drying box body (1) to contact the crushing teeth (43), it will move upward. At this time, the semi-circular tooth (61) and the driven tooth (63) mesh with each other, and the rotating disc (62) will rotate. Driven by the rotating disc (62), the driving rod (64) drives the lifting shovel (42) to rotate. At this time, the coal in the lifting shovel (42) will also shake with the rotation of the lifting shovel (42), so that it can be better dried by the hot air.

7. A coal drying method according to claim 4, characterized in that, The inside of the throwing shovel (42) is provided with a rotating shaft (7). The rotating shaft (7) is rotatably connected to the inner side wall of the throwing shovel (42). The rotating shaft (7) is communicated with the driving rod (64). A telescopic rod (71) is fixedly connected to the side wall of the rotating shaft (7). One end of the telescopic rod (71) far away from the rotating shaft (7) is fixedly connected with an outer soft plate (72). An inner soft plate (721) is inserted into the outer soft plate (72). An arc-shaped track (73) is engraved on the inner side wall of the throwing shovel (42). The inner soft plate (721) is attached to the track (73). When the throwing shovel (42) moves to the upper part, the rotating shaft (7) rotates driven by a motor set at a fixed time, so as to drive the outer soft plate (72) to seal the top of the throwing shovel (42), thus preventing coal from falling out of the throwing shovel (42).

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