A super-high moisture lignite pulverizing device

Abstract

A device for making brown coal with ultra-high moisture content belongs to the technical field of crushing and drying equipment. It is designed to solve the problem of complicated steps and low efficiency in crushing, drying and crushing brown coal. The device uses two crushing rollers with meshing gears driven by a first motor to efficiently perform primary crushing on brown coal. The hot air converted by the steam generated by power generation through a heat exchanger is combined with an S-shaped upward-moving air duct and a movable support plate. Under the coordinated action of an eccentric shaft, a linkage rod and a vibration motor, the brown coal is fully in contact with the hot air during the falling process to achieve uniform and efficient drying. The grinding disc and conical grinding table of the crushing mechanism are driven by a second motor to perform fine grinding. The setting of the storage pipe, sealing block and limit block effectively prevents the drying airflow from entering the crushing mechanism and dust leakage, reduces the loss of hot air, and greatly improves the efficiency of brown coal powder making as a whole, simplifies the operation process, and reduces energy consumption.

Description

Technical Field

[0001] The invention relates to the technical field of crushing and drying equipment, and in particular to a super-high moisture lignite pulverizing device. Background Art

[0002] Lignite is a type of coal with a low degree of coalification. It is brown to black in appearance, has a dull luster, is soft in texture, is easy to break, and contains a high amount of moisture, usually more than 20%. Lignite is mostly used for power generation and can also be used as fuel for industrial boilers.

[0003] In order to improve the combustion efficiency of lignite power generation, the lignite needs to be crushed and pulverized. However, since lignite contains a high amount of water, it needs to be dried after crushing, and then finely crushed again after drying. In this way, the crushing of lignite requires three steps: crushing, drying and crushing. For example, the patents with publication numbers CN114100815A and CN204448227U both achieve the crushing and drying of lignite, but the overall equipment is relatively large, the process is relatively complicated, and the work efficiency is not high. Therefore, it is necessary to design an integrated crushing, drying and crushing equipment to improve work efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide an ultra-high moisture lignite pulverizing device, which solves the problem of complicated steps and low efficiency in the crushing, drying and pulverizing of lignite in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a super-high moisture lignite pulverizing device, comprising a shell and a crushing mechanism, a drying mechanism and a pulverizing mechanism arranged inside the shell, wherein the crushing mechanism, the drying mechanism and the pulverizing mechanism are arranged inside the shell in sequence from top to bottom, and an air inlet pipe and a heat exchanger are arranged outside the shell, the crushing mechanism comprises a frame and a crushing roller rotatably arranged inside the frame, and two crushing rollers are arranged, and eccentric shafts are installed at the ends of the two crushing rollers near the edges, and the drying mechanism comprises a drying box arranged in the middle of the shell, and the drying box A vibration motor is installed on the side wall, a drying chamber is arranged inside the drying box, the top of the drying box corresponds to the frame, and support plates are rotatably arranged on both sides of the drying chamber, and the support plates on both sides of the drying chamber are staggered. The drying mechanism also includes a linkage rod slidably connected to the inside of the drying box, the linkage rod is movably connected to the support plate, a sliding plate is installed above the linkage rod, the sliding plate corresponds to the eccentric shaft, a return spring is installed between the bottom of the sliding plate and the top of the drying box, and a discharge pipe is arranged below the drying box, the discharge pipe is communicated with the inside of the drying chamber, and the air inlet pipe is communicated with the inside of the discharge pipe;

[0006] The steam generated by lignite power generation is converted into hot air through a heat exchanger and transported to the interior of the drying chamber through an air inlet pipe and a discharge pipe. Since the two sides of the drying chamber are rotatably connected with pallets, and the pallets on both sides of the drying chamber are staggered left and right, the airflow entering the drying chamber will move upward in an S shape. When the crushing roller rotates to process and crush, the linkage rod moves downward under the action of the eccentric shaft squeezing the sliding plate. Since the linkage rod is movably connected to the pallet, it will drive the pallet to tilt. After the pallet tilts, under the action of the vibration motor, the crushed lignite slowly falls from the uppermost pallet to the lowermost pallet, and with the help of the S-shaped air duct from bottom to top, the drying is gradually completed, and finally it is finely ground through the crushing mechanism.

[0007] Furthermore, the top of the frame is open and exposed above the shell, and the lower part of the interior of the frame is conical and communicated with the drying chamber inside the drying box.

[0008] Furthermore, the crushing mechanism also includes a first motor fixedly mounted on the outer wall of the frame, and the frame is internally rotatably connected with a meshing gear, which is fixedly connected to both ends of the crushing roller through an axis, and the meshing gears on the two crushing rollers are meshingly connected, and the output end of the first motor is fixedly connected to one group of meshing gears, and the meshing gears are driven to rotate by the first motor, and the rotation directions of two adjacent meshing gears are opposite, which ultimately drives the two crushing rollers to rotate to perform primary crushing of the lignite.

[0009] Furthermore, an exhaust pipe connected to the interior of the drying chamber is arranged above the drying box, a rotating shaft is arranged on the edge of the support plate, and the support plate is rotatably connected to the side wall of the drying chamber through the rotating shaft, and a groove is arranged above the support plate, and the groove is used to prevent the lignite from contacting the inner wall of the drying chamber from the front and rear sides of the support plate, and to prevent the support plate from being stuck by the lignite when rotating.

[0010] Furthermore, guide rods are installed on both sides of the bottom of the sliding plate, and the guide rods are slidably connected to the top of the drying box. Movable shafts are evenly distributed on the outer wall of the linkage rod. Movable grooves corresponding to the movable shafts are arranged on the front and rear sides of the support plate. The movable shafts are movably arranged in the movable grooves. The highest horizontal position of the sliding plate is located below the end shaft of the crushing roller. The sliding plate is limited by the shafts at both ends of the crushing roller. When the top of the sliding plate contacts the shaft at the end of the crushing roller, the support plate is in a horizontal state.

[0011] Furthermore, the heat exchanger includes heat exchange fins and a fan arranged on the side of the heat exchange fins, and also includes heat exchange tubes that pass through and surround the heat exchange fins from top to bottom. The other side of the fan is connected to the air inlet pipe through a conical cover plate, and the heat exchange tubes are connected to the reheat steam. The reheat steam is transported to the heat exchange tubes for circulation. Under the heat conduction of the heat exchange fins and the cooperation of the fan, hot air is transported through the air inlet pipe to dry the lignite moving in the drying chamber.

[0012] Furthermore, the crushing mechanism includes a shell arranged at the lower part of the outer shell, a grinding disc and a grinding table are arranged inside the shell, a hydraulic pressure is arranged at the lower part of the inner part of the outer shell, an output end of the hydraulic pressure is fixedly connected to the bottom of the grinding table, the grinding disc is rotatably connected to the lower part of the inner part of the shell through a bearing, and the grinding disc is located above the outer part of the grinding table, the grinding table is conical, and the upper surface of the grinding table is evenly distributed with second protrusions, the grinding disc is annular, and the inner side surface is inclined, the inner surface of the grinding disc is evenly distributed with first protrusions, and a gap is provided between the outer side of the grinding table and the inner side of the grinding disc, and the gap decreases from top to bottom.

[0013] Furthermore, a second motor is installed on the shell, and the output end of the second motor extends to the interior of the shell and is fixedly connected to a spur gear. Tooth grooves are evenly distributed on the upper outside of the grinding disc, and the spur gears are meshed with the tooth grooves. By starting the second motor, the grinding disc is driven to rotate under the action of the spur gears and the tooth grooves. When the grinding disc rotates, the lignite located between the gap between the grinding disc and the grinding table is gradually ground and becomes smaller.

[0014] Furthermore, the top of the shell is connected to the bottom of the discharge pipe through a material storage pipe, the top of the grinding table is fixedly connected to a connecting rod, the top of the connecting rod is fixedly connected to a sealing block, the sealing block is spindle-shaped with a large middle and small upper and lower parts, and the top of the sealing block matches the shape of the bottom of the material storage pipe.

[0015] Furthermore, a limit block is provided on the upper part of the interior of the shell, and the limit block is provided in a ring shape. The inner side of the limit block matches the outer shape of the bottom of the sealing block. The area between the limit block and the upper part of the interior of the shell forms a storage cavity. A discharge hopper is provided on the lower part of the interior of the shell. The discharge hopper is used to collect and discharge the materials ground by the grinding disc and the grinding table. When the hydraulic press retracts, the grinding table moves downward, and all the materials ground between the grinding disc and the grinding table fall down. When the grinding table descends, the sealing block is driven to descend through the connecting rod, and the upper part of the sealing block leaves the lower part of the storage pipe. The lower part of the sealing block blocks the limit block to form a closed storage cavity. The lignite in the storage pipe falls into the storage cavity. When the hydraulic press is extended, the lignite in the storage cavity falls between the grinding disc and the grinding table for continued grinding. The sealing block blocks the storage pipe to prevent the drying airflow from entering the interior of the pulverizing mechanism, thereby reducing dust and airflow leakage.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention provides a super-high moisture lignite pulverizing device. In the crushing link, two crushing rollers with meshing gears are driven by a first motor to efficiently perform primary crushing on the lignite. The hot air converted by the steam generated by power generation through a heat exchanger is used, and the air duct moving upward in an S shape and the movable support plate are coordinated with the eccentric shaft, the linkage rod and the vibration motor to make the lignite fully contact with the hot air during the falling process, so as to achieve uniform and efficient drying. The grinding disc and the conical grinding table of the pulverizing mechanism are driven by the second motor to perform fine grinding. The setting of the material storage pipe, the sealing block and the limit block effectively prevents the drying airflow from entering the pulverizing mechanism and the dust leakage, reduces the loss of hot air, and greatly improves the efficiency of lignite pulverizing as a whole. The device occupies a small area, simplifies the operation process, and reduces energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a partial structural schematic diagram of the present invention.

[0020] Figure 3 It is a partial structural breakdown diagram of the present invention.

[0021] Figure 4 It is a schematic diagram of the crushing mechanism, drying mechanism, air inlet pipe and heat exchanger structure of the present invention.

[0022] Figure 5 It is a cross-sectional view of the crushing mechanism, drying mechanism, vibration motor, air inlet pipe and heat exchanger structure of the present invention.

[0023] Figure 6 It is a partial structural schematic diagram of the crushing mechanism and drying mechanism of the present invention.

[0024] Figure 7 It is an exploded view of the partial structure of the crushing mechanism and the drying mechanism of the present invention.

[0025] Figure 8 It is a cross-sectional view of the crushing mechanism structure of the present invention.

[0026] Fig. 9 It is an exploded view of the partial structure of the crushing mechanism of the present invention.

[0027] In the figure: 1, housing; 2, crushing mechanism; 21, frame; 22, first motor; 23, meshing gear; 24, crushing roller; 25, eccentric shaft; 3, drying mechanism; 31, drying box; 311, drying chamber; 32, exhaust pipe; 33, support plate; 331, rotating shaft; 332, movable groove; 333, groove; 34, sliding plate; 341, guide rod; 35, reset spring; 36, linkage rod; 37, movable shaft; 38, discharge pipe; 4, vibration motor; 5 , air inlet pipe; 6, heat exchanger; 61, heat exchange fins; 62, heat exchange tube; 63, fan; 7, crushing mechanism; 71, shell; 711, storage tube; 712, limit block; 713, storage chamber; 714, bearing; 72, second motor; 721, spur gear; 73, grinding disc; 731, first protrusion; 732, tooth groove; 74, grinding table; 741, second protrusion; 742, connecting rod; 75, hydraulic pressure; 76, sealing block; 77, discharge hopper. 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] In order to solve the technical problems of complicated and low efficiency in the crushing, drying and pulverizing of lignite, such as Figure 1-Figure 9 As shown, the following preferred technical solutions are provided:

[0030] like Figure 1-Figure 3 As shown, a super-high moisture lignite pulverizing device comprises a shell 1 and a crushing mechanism 2, a drying mechanism 3 and a crushing mechanism 7 arranged inside the shell 1. The crushing mechanism 2, the drying mechanism 3 and the crushing mechanism 7 are arranged inside the shell 1 from top to bottom in sequence. An air inlet pipe 5 and a heat exchanger 6 are arranged outside the shell 1. Figure 5-Figure 7As shown, the crushing mechanism 2 includes a frame 21 and a crushing roller 24 rotatably arranged in the frame 21, and two crushing rollers 24 are provided, and eccentric shafts 25 are installed at the ends of the two crushing rollers 24 near the edges. The drying mechanism 3 includes a drying box 31 arranged in the middle of the shell 1, and a vibration motor 4 is installed on the side wall of the drying box 31. A drying chamber 311 is arranged inside the drying box 31, and the top of the drying box 31 corresponds to the frame 21. Support plates 33 are rotatably arranged on both sides of the drying chamber 311. The support plates 33 on both sides of the drying chamber 311 are arranged alternately, and the drying mechanism 3 also includes a linkage rod 36 slidably connected to the drying box 31, the linkage rod 36 is movably connected to the support plate 33, a sliding plate 34 is installed above the linkage rod 36, the sliding plate 34 corresponds to the eccentric shaft 25, a return spring 35 is installed between the bottom of the sliding plate 34 and the top of the drying box 31, and a discharge pipe 38 is arranged below the drying box 31, the discharge pipe 38 is communicated with the inside of the drying chamber 311, and the air inlet pipe 5 is connected with the inside of the discharge pipe 38;

[0031] The steam generated by the power generation of lignite is converted into hot air through the heat exchanger 6 and transported to the inside of the drying chamber 311 through the air inlet pipe 5 and the discharge pipe 38. Since the two sides of the drying chamber 311 are rotatably connected with the support plates 33, and the support plates 33 on both sides of the drying chamber 311 are staggered left and right, the airflow entering the drying chamber 311 will move upward in an S shape. When the crushing roller 24 rotates to process and crush, the linkage rod 36 moves downward under the action of the eccentric shaft 25 squeezing the sliding plate 34. Since the linkage rod 36 is movably connected to the support plate 33, it will drive the support plate 33 to tilt. After the support plate 33 tilts, under the action of the vibration motor 4, the crushed lignite slowly falls from the uppermost support plate 33 to the lowermost support plate 33, and is gradually dried in conjunction with the S-shaped air duct from bottom to top, and finally finely ground through the crushing mechanism 7.

[0032] like Figure 1 and Figure 7 As shown, the top of the frame 21 is open and exposed above the shell 1, the inner lower part of the frame 21 is conical and connected to the drying chamber 311 inside the drying box 31, and the crushing mechanism 2 also includes a first motor 22 fixedly mounted on the outer wall of the frame 21, and the inner rotation of the frame 21 is connected with a meshing gear 23, and the meshing gear 23 is fixedly connected to the two ends of the crushing roller 24 through an axis, and the meshing gears 23 on the two crushing rollers 24 are meshed and connected, and the output end of the first motor 22 is fixedly connected to one group of meshing gears 23, and the meshing gears 23 are driven to rotate by the first motor 22, and the rotation directions of the two adjacent meshing gears 23 are opposite, which finally drives the two crushing rollers 24 to rotate to perform primary crushing of the lignite.

[0033] like Figure 5-Figure 7As shown, an exhaust pipe 32 communicating with the interior of the drying chamber 311 is arranged above the drying box 31, a rotating shaft 331 is arranged at the edge of the support plate 33, and the support plate 33 is rotatably connected to the side wall of the drying chamber 311 through the rotating shaft 331, and a groove 333 is arranged above the support plate 33, and the groove 333 is used to prevent the lignite from contacting the inner wall of the drying chamber 311 from the front and rear sides of the support plate 33, and prevent the support plate 33 from being stuck by the lignite when rotating, and guide rods 341 are installed on both sides of the bottom of the sliding plate 34, and the guide rods 34 The supporting plate 33 is slidably connected to the top of the drying box 31. The outer wall of the linkage rod 36 is evenly distributed with movable shafts 37. The front and rear sides of the supporting plate 33 are provided with movable grooves 332 corresponding to the movable shafts 37. The movable shafts 37 are movably arranged in the movable grooves 332. The highest horizontal position of the sliding plate 34 is located below the end shaft of the crushing roller 24. The sliding plate 34 is limited under the action of the shafts at both ends of the crushing roller 24. When the top of the sliding plate 34 contacts the shaft at the end of the crushing roller 24, the supporting plate 33 is in a horizontal state.

[0034] like Figure 5 As shown, the heat exchanger 6 includes a heat exchange fin 61 and a fan 63 arranged on the side of the heat exchange fin 61, and also includes a heat exchange tube 62 that passes through and surrounds the heat exchange fin 61 from top to bottom. The other side of the fan 63 is connected to the air inlet pipe 5 through a conical cover plate. The heat exchange tube 62 is connected to the reheat steam, and the reheat steam is transported to the heat exchange tube 62 for circulation. Under the heat conduction of the heat exchange fin 61 and the cooperation of the fan 63, hot air is transported through the air inlet pipe 5 to dry the lignite moving in the drying chamber 311.

[0035] like Figure 8-Figure 9 As shown, the pulverizing mechanism 7 includes a shell 71 arranged at the lower part of the inner part of the shell 1, a grinding disc 73 and a grinding table 74 are arranged inside the shell 71, a hydraulic press 75 is arranged at the lower part of the inner part of the shell 1, and the output end of the hydraulic press 75 is fixedly connected to the bottom of the grinding table 74, the grinding disc 73 is rotatably connected to the lower part of the inner part of the shell 71 through a bearing 714, and the grinding disc 73 is located above the outer part of the grinding table 74, the grinding table 74 is conical, and the upper surface of the grinding table 74 is evenly distributed with second protrusions 741, the grinding disc 73 is annular, and the inner side surface is inclined, and the inner surface of the grinding disc 73 is evenly distributed with first protrusions 731, and a gap is provided between the outer side of the grinding table 74 and the inner side of the grinding disc 73, and the gap is reduced from top to bottom.

[0036] A second motor 72 is installed on the shell 71. The output end of the second motor 72 extends to the inside of the shell 71 and is fixedly connected to a spur gear 721. Tooth grooves 732 are evenly distributed on the upper part of the outside of the grinding disc 73. The spur gear 721 is meshed with the tooth grooves 732. By starting the second motor 72, the grinding disc 73 is driven to rotate under the action of the spur gear 721 and the tooth grooves 732. When the grinding disc 73 rotates, the lignite located between the gap between the grinding disc 73 and the grinding table 74 is gradually ground and becomes smaller.

[0037] The top of the shell 71 is connected to the bottom of the discharge pipe 38 through the storage pipe 711. The top of the grinding table 74 is fixedly connected to a connecting rod 742. The top of the connecting rod 742 is fixedly connected to a sealing block 76. The sealing block 76 is spindle-shaped with a large middle and small top and bottom. The top of the sealing block 76 matches the shape of the bottom of the storage pipe 711.

[0038] A limiting block 712 is provided at the upper part of the inner part of the shell 71. The limiting block 712 is provided in an annular shape. The inner side of the limiting block 712 matches the outer shape of the bottom of the sealing block 76. The area between the limiting block 712 and the upper part of the inner part of the shell 71 forms a storage chamber 713. A discharge hopper 77 is provided at the lower part of the inner part of the shell 1. The discharge hopper 77 is used to collect and discharge the materials ground by the grinding disc 73 and the grinding table 74. When the hydraulic press 75 is retracted, the grinding table 74 moves downward, and all the materials ground between the grinding disc 73 and the grinding table 74 fall down. When the grinding table 74 descends, the sealing block 76 is driven to descend through the connecting rod 742. The upper part of the sealing block 76 leaves the lower part of the storage tube 711, and the lower part of the sealing block 76 blocks the limit block 712 to form a closed storage chamber 713. The lignite inside the storage tube 711 falls into the storage chamber 713. When the hydraulic press 75 is extended, the lignite in the storage chamber 713 falls between the grinding disc 73 and the grinding table 74 to continue to be ground. The sealing block 76 blocks the storage tube 711 to prevent the dried airflow from entering the inside of the pulverizing mechanism 7, thereby reducing dust and airflow leakage.

[0039] Working principle: First, the reheated steam generated by power generation is used to heat the air through the heat exchanger 6 and transported into the drying box 31 through the air inlet pipe 5, and the crushing mechanism 2 is started to perform primary crushing on the lignite. The crushed lignite enters the drying chamber 311. While the crushing roller 24 rotates to crush the lignite, the eccentric shaft 25 intermittently moves the sliding plate 34 downward, and the supporting plate 33 is shaken downward under the action of the linkage rod 36 and the movable shaft 37. With the vibration of the vibration motor 4, the lignite moves downward in sequence along the multiple groups of supporting plates 33. The hot air entering the drying chamber 311 moves upward in an S shape, forming convection with the downwardly moving lignite, and the lignite After the coal is dried, it falls into the storage pipe 711 through the discharge pipe 38. The crushed lignite is discharged downward through the discharge hopper 77 by retracting the hydraulic press 75. Then the lignite in the storage pipe 711 falls into the storage chamber 713. When the hydraulic press 75 is extended, the lignite in the storage chamber 713 falls between the grinding disc 73 and the grinding table 74. The grinding table 74 is driven to rotate by the second motor 72 to continue fine grinding. The setting of the sealing block 76, the storage pipe 711 and the limit block 712 prevents the drying hot air from entering the interior of the grinding mechanism 7, thereby preventing dust leakage, preventing hot air loss, and improving the drying efficiency.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] The above description 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 device for making ultra-high moisture brown coal powder, comprising a housing (1) and a crushing mechanism (2), a drying mechanism (3) and a pulverizing mechanism (7) arranged inside the housing (1), characterized in that: The crushing mechanism (2), the drying mechanism (3) and the pulverizing mechanism (7) are sequentially arranged inside the housing (1) from top to bottom. An air inlet pipe (5) and a heat exchanger (6) are arranged outside the housing (1). The crushing mechanism (2) comprises a frame (21) and a crushing roller (24) rotatably arranged inside the frame (21). Two crushing rollers (24) are arranged. An eccentric shaft (25) is installed at the ends of the two crushing rollers (24) near the edges. The drying mechanism (3) comprises a drying box (31) arranged in the middle of the housing (1). A vibration motor (4) is installed on the side wall of the drying box (31). A drying chamber (311) is arranged inside the drying box (31). The top of the drying box (31) is connected to the frame (21). Correspondingly, supporting plates (33) are rotatably arranged on both sides of the drying chamber (311), and the supporting plates (33) on both sides of the drying chamber (311) are arranged in a staggered manner. The drying mechanism (3) further comprises a linkage rod (36) slidably connected to the inside of the drying box (31), the linkage rod (36) and the supporting plates (33) are movably connected, a sliding plate (34) is installed above the linkage rod (36), the sliding plate (34) corresponds to the eccentric shaft (25), a return spring (35) is installed between the bottom of the sliding plate (34) and the top of the drying box (31), and a discharge pipe (38) is arranged below the drying box (31), the discharge pipe (38) is communicated with the inside of the drying chamber (311), and the air inlet pipe (5) is communicated with the inside of the discharge pipe (38); The top of the frame (21) is open and exposed above the outer shell (1); the lower part of the interior of the frame (21) is conical and communicates with a drying chamber (311) inside the drying box (31); The pulverizing mechanism (7) comprises a shell (71) arranged at the lower part of the inner part of the shell (1); a grinding disc (73) and a grinding table (74) are arranged at the inner part of the shell (71); a hydraulic pressure (75) is arranged at the lower part of the inner part of the shell (1); an output end of the hydraulic pressure (75) is fixedly connected to the bottom of the grinding table (74); the grinding disc (73) is rotatably connected to the lower part of the inner part of the shell (71) via a bearing (714); the grinding disc (73) is located at the upper part of the outer part of the grinding table (74); the grinding table (74) is conical; second protrusions (741) are evenly distributed on the upper surface of the grinding table (74); the grinding disc (73) is annular; and the inner side surface is arranged obliquely; the inner surface of the grinding disc (73) is evenly distributed with first protrusions (731); a gap is provided between the outer side of the grinding table (74) and the inner side of the grinding disc (73); the gap is gradually reduced from top to bottom; The top of the shell (71) is connected to the bottom of the discharge pipe (38) through the material storage pipe (711), the top of the grinding table (74) is fixedly connected to a connecting rod (742), and the top of the connecting rod (742) is fixedly connected to a sealing block (76), the sealing block (76) is in the shape of a spindle with a large middle and small top and bottom, and the top of the sealing block (76) matches the shape of the bottom of the material storage pipe (711).

2. The ultra-high moisture lignite pulverizing device according to claim 1, characterized in that: The crushing mechanism (2) further comprises a first motor (22) fixedly mounted on the outer wall of the frame (21); a meshing gear (23) is rotatably connected inside the frame (21); the meshing gear (23) is fixedly connected to both ends of a crushing roller (24) via a shaft; the meshing gears (23) on the two crushing rollers (24) are meshedly connected; and an output end of the first motor (22) is fixedly connected to one set of the meshing gears (23).

3. The ultra-high moisture lignite pulverizing device according to claim 1, characterized in that: An exhaust pipe (32) communicating with the interior of the drying chamber (311) is arranged above the drying box (31); a rotating shaft (331) is arranged at the edge of the support plate (33); the support plate (33) is rotatably connected to the side wall of the drying chamber (311) via the rotating shaft (331); a groove (333) is arranged above the support plate (33); the groove (333) is used to prevent the lignite from contacting the inner wall of the drying chamber (311) from the front and rear sides of the support plate (33), thereby preventing the support plate (33) from being stuck by the lignite when rotating.

4. The ultra-high moisture lignite pulverizing device according to claim 1, characterized in that: Guide rods (341) are installed on both sides of the bottom of the sliding plate (34), and the guide rods (341) are slidably connected to the top of the drying box (31). Movable shafts (37) are evenly distributed on the outer wall of the linkage rod (36). Movable grooves (332) corresponding to the movable shafts (37) are arranged on the front and rear sides of the support plate (33). The movable shafts (37) are movably arranged in the movable grooves (332). The highest horizontal position of the sliding plate (34) is located below the end shaft of the crushing roller (24).

5. The ultra-high moisture lignite pulverizing device according to claim 1, characterized in that: The heat exchanger (6) comprises heat exchange fins (61) and a fan (63) arranged on the side of the heat exchange fins (61), and also comprises a heat exchange tube (62) that passes through and surrounds the heat exchange fins (61) from top to bottom, the other side of the fan (63) is connected to the air inlet pipe (5) through a conical cover plate, and the heat exchange tube (62) is connected to the reheat steam.

6. The ultra-high moisture lignite pulverizing device according to claim 1, characterized in that: A second motor (72) is mounted on the housing (71); an output end of the second motor (72) extends into the interior of the housing (71) and is fixedly connected to a spur gear (721); tooth grooves (732) are evenly distributed above the exterior of the grinding disc (73); and the spur gear (721) meshes with the tooth grooves (732).

7. The ultra-high moisture lignite pulverizing device according to claim 6, characterized in that: A limit block (712) is arranged at the upper part of the interior of the shell (71); the limit block (712) is arranged in an annular shape; the inner side of the limit block (712) matches the shape of the outer side of the bottom of the sealing block (76); the area between the limit block (712) and the upper part of the interior of the shell (71) forms a material storage cavity (713); and a discharge hopper (77) is arranged at the lower part of the interior of the outer shell (1).

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