Electromagnetic heating rod mill with high hydrothermal dewatering efficiency

Abstract

The present application relates to the technical field of coal processing equipment, and particularly relates to an electromagnetic heating rod mill with high hydrothermal dehydration efficiency. The electromagnetic heating rod mill with high hydrothermal dehydration efficiency comprises a rack, a left support seat and a right support seat arranged on the rack, and rolling sealing bearings are arranged in the left support seat and the right support seat; a rod mill mechanism is arranged on the rack and is used for rolling and grinding material, and the rod mill mechanism comprises a middle cylinder, an electromagnetic coil, and an electromagnetic heating controller electrically connected to the electromagnetic coil; a discharging mechanism is arranged on the right cylinder and is used for discharging material; a water inlet pipe is arranged at the top of the right cylinder and is in communication with the right cylinder, and a one-way valve one is arranged at the top of the water inlet pipe. The electromagnetic heating rod mill with high hydrothermal dehydration efficiency has the advantages of simple structure and high hydrothermal dehydration efficiency.

Description

Technical Field

[0001] This invention relates to the field of coal processing equipment technology, and in particular to an electromagnetic heating rod mill with high hydrothermal dehydration efficiency. Background Technology

[0002] Low-rank coal is a type of coal with a low degree of coalification, characterized by high moisture content, low calorific value, high chemical reactivity, and flammability and brittleness. Low-rank coal mainly includes lignite and low-rank bituminous coal. Due to its low degree of coalification, direct combustion of low-rank coal as fuel not only results in low combustion efficiency but also causes serious environmental pollution. Coal-water slurry technology originated in the 1980s and, after decades of development and improvement, has become increasingly mature. Given the recent sluggishness of the coal market, developing coal-water slurry technology is also of great significance for promoting the diversification of coal products, adjusting and upgrading the energy structure, and alleviating environmental pressure.

[0003] However, due to the abundant capillaries and high porosity of lignite, its high water content, rich oxygen-containing functional groups, high O / C ratio, low calorific value, and high volatile matter content, it is difficult to directly produce high-concentration coal-water slurry without treatment. Hydrothermal dehydration and upgrading is a "non-evaporative" dehydration technology that removes moisture from low-rank coal in liquid form under saturated vapor pressure, while simultaneously removing oxygen-containing functional groups. After hydrothermal upgrading, the equilibrium water content, volatile matter content, hydrogen content, and oxygen content of low-rank coal decrease, while fixed carbon and calorific value increase significantly. However, existing coal-water slurry processing equipment is inefficient during hydrothermal dehydration and cannot achieve continuous water washing processing.

[0004] Therefore, it is necessary to provide a new electromagnetic heating rod mill with high hydrothermal dehydration efficiency to solve the above-mentioned technical problems. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides an electromagnetic heating rod mill with a simple structure and high hydrothermal dehydration efficiency.

[0006] The electromagnetic heating rod mill with high hydrothermal dehydration efficiency provided by the present invention includes: a frame, and a left support seat and a right support seat mounted on the frame, wherein rolling sealed bearings are installed in both the left support seat and the right support seat;

[0007] A rod mill mechanism for rolling grinding of materials is mounted on a frame. The rod mill mechanism includes a central cylinder, which is rotatably mounted on rolling sealed bearings in a left support seat and a right support seat. A left cylinder for sealing one end of the central cylinder is fixedly mounted on the left support seat, and a right cylinder for sealing the other end of the central cylinder is fixedly mounted on the right support seat. The central cylinder is filled with several steel grinding rods. A large gear is fixedly sleeved on one end of the central cylinder. A power motor and a reducer are mounted on the frame. The output shaft of the power motor is connected to the input shaft of the reducer. A small gear is fixedly sleeved on the output shaft of the reducer. The small gear meshes with the large gear. A screen is embedded at one end of the right cylinder near the central cylinder. The aperture of the screen is smaller than the diameter of the steel grinding rods. A nitrogen pressure regulating pipe is embedded at the other end of the right cylinder. A pressure balancing valve is installed on the nitrogen pressure regulating pipe.

[0008] An electromagnetic coil is mounted on the frame and the intermediate cylinder is housed inside it. The electromagnetic coil is electrically connected to an electromagnetic heating controller.

[0009] The feeding mechanism, used for automatic material feeding, is installed on the left cylinder body. The feeding mechanism includes a conveying pipe, which is fixedly installed on the left cylinder body. A feeding pipe is installed in the middle of the conveying pipe. A gate valve one is installed at the end of the conveying pipe near the left cylinder body, and a gate valve two is installed at the end of the feeding pipe near the conveying pipe.

[0010] The material discharge mechanism is installed on the right cylinder body. The material discharge mechanism includes a discharge pipe, which is fixedly installed on the right cylinder body. A hydraulic cylinder two is fixedly installed at the end of the discharge pipe away from the right cylinder body. A discharge piston is installed at the telescopic end of the hydraulic cylinder two. A discharge port is opened at the bottom middle part of the discharge pipe. The discharge piston is a double piston head, and the distance between the two piston heads is less than or equal to the shortest distance between the discharge port and the right cylinder body. A material trough is installed at the discharge port. A stirring assembly is installed in the material trough. The stirring assembly includes a stirring motor, which is fixedly installed on the outside of the material trough. A transmission rod is fixedly installed in the material trough through the input shaft of the stirring motor. Several stirring rods are evenly installed on the transmission rod. Electric rods are symmetrically installed on the outside of the material trough. A sealing block for sealing the bottom of the material trough is fixedly installed at the telescopic end of the electric rod. An injection tube is embedded in the sealing block, and a one-way valve two is embedded in the injection tube.

[0011] A water inlet pipe is installed at the top of the right cylinder and communicates with the right cylinder, and a one-way valve is installed at the top of the water inlet pipe.

[0012] A pressure relief pipe is installed at the top of the right cylinder and connected to the right cylinder. A pressure relief valve is installed on the pressure relief pipe. During the heating process, the raw coal gas generated by heating is introduced from the pressure relief pipe into the tail gas treatment equipment for treatment.

[0013] A thermocouple is mounted on the right cylinder and electrically connected to the electromagnetic heating controller.

[0014] Preferably, a hydraulic cylinder is fixedly installed at the end of the conveying pipe opposite to the left cylinder body, a feed piston is installed at the telescopic end of the hydraulic cylinder, and a feed funnel is installed on the feed pipe.

[0015] Preferably, a centering pipe that connects to the delivery pipe is installed in the left cylinder body, and a retaining ring is fixedly installed at the end of the centering pipe facing the middle cylinder body.

[0016] Preferably, a protective sleeve is fixedly installed at the end of the feed piston away from the left cylinder body. The length of the protective sleeve is greater than the maximum distance between the feed pipe and the left cylinder body, and the outer diameter of the protective sleeve is equal to the inner diameter of the conveying pipe.

[0017] Compared with related technologies, the electromagnetic heating rod mill with high hydrothermal dehydration efficiency provided by the present invention has the following beneficial effects:

[0018] 1. This invention provides an electromagnetic heating rod mill with high hydrothermal dehydration efficiency. The rod mill mechanism is equipped with a rotating intermediate cylinder. The intermediate cylinder is driven to rotate by the cooperation of a large gear, a power motor, a reducer, and a small gear. The steel grinding rods inside the intermediate cylinder move to perform rod grinding. During grinding, the electromagnetic heating controller controls the electromagnetic coil to conduct electricity, thereby using electromagnetic heating technology to place the rod mill cylinder in the middle of the electromagnetic heating coil. In this heating method, the electromagnetic coil does not contact the cylinder and does not affect the free rotation of the cylinder. When the electromagnetic heating is working, the steel rods inside the cylinder and the cylinder are heated at the same time. The steel rods continuously roll while grinding coal and uniformly heating the coal-water mixture.

[0019] 2. By setting up piston-type feeding and discharging mechanisms, the airtightness of the intermediate cylinder is maintained during continuous feeding and unloading to prevent leakage of crude gas.

[0020] 3. By installing a material trough in the discharge port of the discharge pipe, and setting a stirring component in the material trough, the discharged coal-water slurry can be fully stirred, improving the uniformity of the coal-water mixture, and a catalyst can be added through the injection pipe. Attached Figure Description

[0021] Figure 1 A schematic diagram of a preferred embodiment of the electromagnetic heating rod mill with high hydrothermal dehydration efficiency provided by the present invention;

[0022] Figure 2A schematic diagram of the axial section of the electromagnetic heating rod mill with high hydrothermal dehydration efficiency provided by the present invention;

[0023] Figure 3 A schematic diagram of a rod milling mechanism mounted on a frame, provided by the present invention;

[0024] Figure 4 A schematic diagram of a feeding mechanism mounted on the left cylinder body provided by the present invention;

[0025] Figure 5 A schematic diagram of a discharge mechanism installed on the right cylinder body provided by the present invention;

[0026] Figure 6 Another structural schematic diagram of the discharge mechanism installed on the right cylinder of the present invention;

[0027] Figure 7 This is a cross-sectional structural diagram of the discharge mechanism installed on the right cylinder of the present invention.

[0028] Numbered in the diagram: 1. Frame; 11. Left support; 12. Right support; 13. Rolling seal bearing; 2. Bar mill mechanism; 21. Intermediate cylinder; 22. Left cylinder; 221. Centering pipe; 222. Retaining ring; 23. Right cylinder; 231. Nitrogen pressure regulating pipe; 232. Pressure balance valve; 24. Steel grinding rod; 25. Large gear; 26. Power motor; 27. Reducer; 28. Small gear; 29. ​​Screen; 3. Electromagnetic coil; 31. Electromagnetic heating controller; 4. Feeding mechanism; 41. Conveying pipe; 42. Hydraulic cylinder one; 43. Feed piston; 431. Protective sleeve; 44. Feed pipe; 45. Feed funnel; 46. Gate valve one; 47. Gate valve two; 5. Discharge mechanism; 51. Discharge pipe; 52. Hydraulic cylinder two; 53. Discharge piston; 54. Material trough; 501. Discharge port; 6. Water inlet pipe; 61. One-way valve one; 7. Pressure relief pipe; 71. Pressure relief valve; 8. Thermocouple; 9. Stirring assembly; 91. Stirring motor; 92. Transmission rod; 93. Stirring rod; 94. Electric rod; 95. Sealing block; 96. Injection tube; 97. One-way valve two. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0030] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0031] Example 1

[0032] Please see Figures 1 to 7 The present invention provides an electromagnetic heating rod mill with high hydrothermal dehydration efficiency, comprising:

[0033] The frame 1, and the left support 11 and right support 12 mounted on the frame 1, are equipped with rolling seal bearings 13 in both the left support 11 and the right support 12.

[0034] The rod mill mechanism 2, used for rolling grinding of materials, is installed on the frame 1. The rod mill mechanism 2 includes an intermediate cylinder 21, which is rotatably mounted on a rolling sealed bearing 13 in a left support seat 11 and a right support seat 12. A left cylinder 22 for sealing one end of the intermediate cylinder 21 is fixedly installed on the left support seat 11, and a right cylinder 23 for sealing the other end of the intermediate cylinder 21 is fixedly installed on the right support seat 12. The intermediate cylinder 21 is filled with several steel grinding rods 24. A large gear 25 is fixedly sleeved on one end of the intermediate cylinder 21. A power motor 26 and a reducer 27 are installed on the frame 1. The output shaft of the power motor 26 is connected to the input shaft of the reducer 27. A small gear 28 is fixedly sleeved on the output shaft of the reducer 27. The small gear 28 meshes with the large gear 25.

[0035] An electromagnetic coil 3 is mounted on a frame 1 and encloses the intermediate cylinder 21 inside it. The electromagnetic coil 3 is electrically connected to an electromagnetic heating controller 31.

[0036] Feeding mechanism 4, used for automatic material feeding, is installed on the left cylinder 22;

[0037] The discharge mechanism 5, which is used for discharging materials, is installed on the right cylinder body 23;

[0038] The water inlet pipe 6 is installed at the top of the right cylinder 23 and is connected to the right cylinder 23. A one-way valve 61 is installed at the top of the water inlet pipe 6.

[0039] The pressure relief pipe 7 is installed at the top of the right cylinder 23 and connected to the right cylinder 23. The pressure relief pipe 7 is equipped with a pressure relief valve 71. During the heating process, the raw coal gas generated by heating is introduced from the pressure relief pipe 7 into the tail gas treatment equipment for treatment.

[0040] Thermocouple 8 is embedded in the right cylinder 23 and electrically connected to the electromagnetic heating controller 31.

[0041] It should be noted that during use, the pre-crushed low-rank coal is fed into the left cylinder 22 through the feeding mechanism 4, and then into the intermediate cylinder 21. The electromagnetic coil 3 is energized by the electromagnetic heating controller 31, and water is injected into the intermediate cylinder 21 through the water inlet pipe 6. Then, the power motor 26 is started. The power motor 26 drives the small gear 28 to rotate through the reducer 27. The small gear 28 meshes with the large gear 25, thereby driving the large gear 25 to rotate the intermediate cylinder 21. During rotation, the steel grinding rod 24 rotates to the desired position. Then it falls down to grind the material and water in the intermediate cylinder 21. When rotating, the electromagnetic coil 3 electromagnetically heats the intermediate cylinder 21 and the steel grinding rod 24 simultaneously, so that the steel rod rolls continuously while grinding coal and heating the coal-water mixture evenly. After stirring, the material is discharged by the discharge mechanism 5. During the heating process, the raw coal gas generated by heating is introduced into the tail gas treatment equipment through the pressure relief pipe 7 for treatment. When depressurizing, the pressure relief valve 71 automatically depressurizes and exhausts gas when the gas pressure in the intermediate cylinder 21 is greater than the set value.

[0042] It should also be noted that the inner and outer sides of the middle cylinder block 21, the left cylinder block 22, and the right cylinder block 23 are all coated with a heat-insulating coating.

[0043] In an embodiment of the present invention, please refer to Figures 1 to 7 The right cylinder 23 is fitted with a screen 29 at one end near the middle cylinder 21. The aperture of the screen 29 is smaller than the diameter of the steel grinding rod 24. The other end of the right cylinder 23 is fitted with a nitrogen pressure regulating pipe 231. A pressure balance valve 232 is installed on the nitrogen pressure regulating pipe 231.

[0044] It should be noted that during discharge, the grinding medium in the intermediate cylinder 21 falls into the right cylinder 23 through the screen 29, facilitating discharge by the discharge mechanism 5. The aperture of the screen 29 is smaller than the diameter of the steel grinding rod 24 to prevent the steel grinding rod 24 from entering the right cylinder 23 and causing rotational interference. The right cylinder 23 is connected to a nitrogen tank through a nitrogen pressure regulating pipe 231. When the internal pressure drops, the pressure balance valve 232 automatically pours inert nitrogen into the intermediate cylinder 21. While regulating the pressure, inert gas is introduced to prevent the low-rank coal from exploding during the production process.

[0045] In an embodiment of the present invention, please refer to Figures 1 to 7 The feeding mechanism 4 includes a conveying pipe 41, which is fixedly installed on the left cylinder 22. A hydraulic cylinder 42 is fixedly installed at the end of the conveying pipe 41 away from the left cylinder 22. A feeding piston 43 is installed at the telescopic end of the hydraulic cylinder 42. A feeding pipe 44 is installed in the middle of the conveying pipe 41. A feeding funnel 45 is installed on the feeding pipe 44.

[0046] Among them, a gate valve 46 is installed at the end of the conveying pipe 41 near the left cylinder 22, and a gate valve 47 is installed at the end of the feed pipe 44 near the conveying pipe 41.

[0047] It should be noted that when the feeding mechanism 4 is in use, the pre-ground low-rank coal is introduced into the feeding funnel 45. When the intermediate cylinder 21 needs to be fed, the feeding piston 43 is on the left side of the feeding pipe 44. At this time, the gate valve 1 46 is closed. Then the gate valve 2 47 is opened to introduce the material in the feeding pipe 44 into the conveying pipe 41. Then the gate valve 2 47 is closed and the gate valve 1 46 is opened. Then the hydraulic cylinder 1 42 is controlled to drive the feeding piston 43 to push the coal falling into the conveying pipe 41 into the left cylinder 22 to complete the feeding. After pushing, the feeding piston 43 is controlled to retract and reset. Then the gate valve 1 46 is closed and the gate valve 2 47 is opened to prepare for the next feeding. In this way, when feeding, the gate valve 1 46 and the gate valve 2 47 are opened and closed alternately to achieve the feeding seal of the intermediate cylinder 21.

[0048] In this embodiment: a centering pipe 221 connected to the conveying pipe 41 is installed inside the left cylinder 22. A retaining ring 222 is fixedly installed at one end of the centering pipe 221 facing the middle cylinder 21. In this way, the centering pipe 221 carries the coal pushed by the feed piston 43, making it easier for it to fall into the middle cylinder 21. The retaining ring 222 is set to limit and block the steel grinding rod 24, so as to prevent the steel grinding rod 24 from falling into the left cylinder 22 during coal grinding and causing rotational interference.

[0049] Among them, a protective sleeve 431 is fixedly installed at the end of the feed piston 43 away from the left cylinder 22. The length of the protective sleeve 431 is greater than the maximum distance between the feed pipe 44 and the left cylinder 22, and the outer diameter of the protective sleeve 431 is equal to the inner diameter of the conveying pipe 41.

[0050] It should be noted that when the feed piston 43 pushes the material, when the feed piston 43 passes the feed pipe 44, the protective sleeve 431 is used for protection, which can prevent the coal at the opening of the feed pipe 44 from falling into the left side of the feed piston 43, causing the feed piston 43 to jam when it resets, and affecting the subsequent continuous feeding.

[0051] In an embodiment of the present invention, please refer to Figures 1 to 7 The discharge mechanism 5 includes a discharge pipe 51, which is fixedly installed on the right cylinder body 23. A hydraulic cylinder 2 52 is fixedly installed at the end of the discharge pipe 51 away from the right cylinder body 23. A discharge piston 53 is installed at the telescopic end of the hydraulic cylinder 2 52. A discharge port 501 is opened at the bottom middle part of the discharge pipe 51.

[0052] It should be noted that when the discharge mechanism 5 is in use, the ground coal passes through the screen 29 and falls into the right cylinder 23. The discharge piston 53 is pushed into the right cylinder 23 by the control hydraulic cylinder 2 52, and the water-coal mixture is introduced into the discharge pipe 51. Then, the control hydraulic cylinder 2 52 retracts, and the water-coal mixture in the discharge pipe 51 is discharged from the discharge port 501 by the discharge piston 53 to complete the discharge.

[0053] In this embodiment, the discharge piston 53 has two piston heads, and the distance between the two piston heads is less than or equal to the shortest distance between the discharge port 501 and the right cylinder 23. This double-headed discharge piston 53 ensures that the middle cylinder 21 can always maintain a high-pressure seal regardless of how the discharge piston 53 moves. Specifically, during discharge, the left piston extends into the mill, and the right piston head maintains the seal. The piston continues to move to the right, and the right piston passes the discharge port 501. At this time, the left piston maintains a high-pressure seal.

[0054] Example 2

[0055] This second embodiment is based on the first embodiment; please refer to... Figures 1 to 7 A material trough 54 is installed at the discharge port 501, and a stirring component 9 is installed inside the material trough 54;

[0056] The stirring assembly 9 includes a stirring motor 91, which is fixedly installed on the outside of the material tank 54. The input shaft of the stirring motor 91 extends into the material tank 54 and is fixedly installed with a transmission rod 92. Several stirring rods 93 are evenly installed on the transmission rod 92. Electric rods 94 are symmetrically installed on the outside of the material tank 54. A sealing block 95 for sealing the bottom of the material tank 54 is fixedly installed at the telescopic end of the electric rod 94. An injection tube 96 is embedded in the sealing block 95, and a one-way valve 97 is embedded in the injection tube 96.

[0057] It should be noted that: the water-coal mixture discharged from the outlet 501 automatically falls into the trough 54, and then the stirring motor 91 is started. The stirring motor 91 drives the transmission rod 92 to drive the stirring rod 93 to stir in the trough 54, thereby making the mixture more uniform. During stirring, a catalyst can be injected into the trough 54 through the injection tube 96 to improve the catalytic reaction effect and improve the production efficiency of water-coal slurry. After the mixture is uniformly stirred, the sealing block 95 is withdrawn from the bottom of the trough 54 by controlling the electric rod 94 to complete the discharge. After discharge, the sealing block 95 is reset by controlling the electric rod 94. Then the above discharge steps are repeated to achieve automatic and continuous sealed discharge.

[0058] It should also be noted that during stirring, the discharge piston 53 seals the discharge port 501. Specifically, the two pistons of the discharge piston 53 are located on the left and right sides of the discharge port 501, respectively.

[0059] The working principle of the electromagnetic heating rod mill with high hydrothermal dehydration efficiency provided by this invention is as follows:

[0060] In operation, the pre-crushed low-rank coal is fed into the left cylinder 22 from the feeding mechanism 4. Specifically, the pre-crushed low-rank coal is fed into the feeding funnel 45. When the intermediate cylinder 21 needs to be fed, the feeding piston 43 is positioned to the left of the feeding pipe 44. At this time, the gate valve 1 46 is closed. Then, the gate valve 2 47 is opened to guide the material in the feeding pipe 44 into the conveying pipe 41. Then, the gate valve 2 47 is closed, the gate valve 1 46 is opened, and the hydraulic cylinder 1 42 is controlled to drive the feeding piston 43 to push the coal falling into the conveying pipe 41 into the left cylinder 22, completing the feeding process. The coal is then fed into the intermediate cylinder 21. The electromagnetic heating controller 31 controls the electromagnetic coil 3 to be energized, and water is injected into the intermediate cylinder 21 through the water inlet pipe 6. The power motor 26 is then started. The power motor 26 drives the small gear 28 to rotate through the reducer 27. The small gear 28 meshes with the large gear 25, thereby driving the large gear 25 to rotate the intermediate cylinder 21. When rotating, the steel grinding rod 24 rotates to the position and then falls down to grind the material and water in the intermediate cylinder 21. When rotating, the electromagnetic coil 3 electromagnetically heats the intermediate cylinder 21 and the steel grinding rod 24 simultaneously, so that the steel rod rolls continuously while grinding coal and heating the coal-water mixture evenly. After stirring, the material is discharged using the discharge mechanism 5. Specifically, the ground coal passes through the screen 29 and falls into the right cylinder 23. The discharge piston 53 is pushed into the right cylinder 23 by the control hydraulic cylinder 2 52, and the coal-water mixture is introduced into the discharge pipe 51. Then, the control hydraulic cylinder 2 52 retracts, and the coal-water mixture in the discharge pipe 51 is discharged from the discharge port 501 by the discharge piston 53 to complete the discharge. During the heating process, the raw coal gas generated by heating is introduced into the tail gas treatment equipment for treatment through the pressure relief pipe 7. When the pressure is released, the pressure relief valve 71 automatically releases the pressure and exhausts the gas when the gas pressure in the intermediate cylinder 21 is greater than the set value.

[0061] Furthermore, during feeding, gate valve 46 and gate valve 47 are alternately opened and closed to achieve feeding seal of intermediate cylinder 21. During discharging, by setting a double-headed discharge piston 53, the intermediate cylinder 21 can always maintain high pressure seal no matter how the discharge piston 53 moves. Specifically, during discharging, the left piston extends into the mill, and the right piston head maintains the sealing state. The piston continues to move to the right, and the right piston passes through the discharge port 501. At this time, the left piston maintains high pressure seal.

[0062] During discharge, the coal-water mixture discharged from outlet 501 automatically falls into trough 54. Then, the stirring motor 91 is started, which drives the transmission rod 92 to drive the stirring rod 93 to stir in trough 54, thereby making the mixture more uniform. During stirring, a catalyst can be injected into trough 54 through injection tube 96 to improve the catalytic reaction effect and improve the production efficiency of coal-water slurry. After uniform stirring, the sealing block 95 is withdrawn from the bottom of trough 54 by controlling the electric rod 94 to complete the discharge. After discharge, the sealing block 95 is reset by controlling the electric rod 94. Then, the above discharge steps are repeated to achieve automatic continuous sealed discharge.

[0063] The circuits and controls involved in this invention are all existing technologies and will not be described in detail here.

[0064] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A high-efficiency electromagnetic heating rod mill for hydrothermal dehydration, comprising: The frame (1), and the left support seat (11) and the right support seat (12) mounted on the frame (1), wherein rolling seal bearings (13) are installed in the left support seat (11) and the right support seat (12). Its characteristic is that it further includes: A rod mill mechanism (2) for rolling grinding of materials is mounted on the frame (1). The rod mill mechanism (2) includes an intermediate cylinder (21). The intermediate cylinder (21) is rotatably mounted on rolling sealed bearings (13) in the left support seat (11) and the right support seat (12). A left cylinder (22) for sealing one end of the intermediate cylinder (21) is fixedly mounted on the left support seat (11), and a right cylinder (23) for sealing the other end of the intermediate cylinder (21) is fixedly mounted on the right support seat (12). The intermediate cylinder (21) is filled with a plurality of steel grinding rods (24). One end of the intermediate cylinder (21) is fixed. A large gear (25) is fitted on the frame (1), and a power motor (26) and a reducer (27) are installed on the frame (1). The output shaft of the power motor (26) is connected to the input shaft of the reducer (27). A small gear (28) is fixedly fitted on the output shaft of the reducer (27). The small gear (28) meshes with the large gear (25). A screen (29) is embedded at one end of the right cylinder (23) near the middle cylinder (21). The aperture of the screen (29) is smaller than the diameter of the steel grinding rod (24). A nitrogen pressure regulating pipe (231) is embedded at the other end of the right cylinder (23). A pressure balance valve (232) is installed on the nitrogen pressure regulating pipe (231). An electromagnetic coil (3) is mounted on the frame (1) and covers the intermediate cylinder (21) inside it. The electromagnetic coil (3) is electrically connected to an electromagnetic heating controller (31). Feeding mechanism (4), used for automatic material feeding, is installed on the left cylinder (22). The feeding mechanism (4) includes a conveying pipe (41), which is fixedly installed on the left cylinder (22). A feeding pipe (44) is installed in the middle of the conveying pipe (41). A gate valve (46) is installed at one end of the conveying pipe (41) near the left cylinder (22), and a gate valve (47) is installed at one end of the feeding pipe (44) near the conveying pipe (41). The discharge mechanism (5), used for material discharge, is installed on the right cylinder body (23). The discharge mechanism (5) includes a discharge pipe (51), which is fixedly installed on the right cylinder body (23). A hydraulic cylinder two (52) is fixedly installed at one end of the discharge pipe (51) away from the right cylinder body (23). A discharge piston (53) is installed at the telescopic end of the hydraulic cylinder two (52). A discharge port (501) is opened at the bottom middle part of the discharge pipe (51). The discharge piston (53) is a double piston head, and the distance between the two piston heads is less than or equal to the shortest distance between the discharge port (501) and the right cylinder body (23). A material trough (5) is installed at the discharge port (501). 4) A stirring assembly (9) is installed in the material tank (54). The stirring assembly (9) includes a stirring motor (91). The stirring motor (91) is fixedly installed on the outside of the material tank (54). The input shaft of the stirring motor (91) extends into the material tank (54) and a transmission rod (92) is fixedly installed. Several stirring rods (93) are evenly installed on the transmission rod (92). Electric rods (94) are symmetrically installed on the outside of the material tank (54). A sealing block (95) for sealing the bottom of the material tank (54) is fixedly installed at the telescopic end of the electric rod (94). An injection tube (96) is embedded in the sealing block (95). A one-way valve (97) is embedded in the injection tube (96). The water inlet pipe (6) is installed at the top of the right cylinder (23) and communicates with the right cylinder (23), and a one-way valve (61) is installed at the top of the water inlet pipe (6). The pressure relief pipe (7) is installed at the top of the right cylinder (23) and connected to the right cylinder (23). The pressure relief pipe (7) is equipped with a pressure relief valve (71). During the heating process, the raw coal gas generated by heating is introduced from the pressure relief pipe (7) into the tail gas treatment equipment for treatment. Thermocouple (8) is embedded in the right cylinder (23) and electrically connected to the electromagnetic heating controller (31).

2. The electromagnetic heating rod mill with high hydrothermal dehydration efficiency according to claim 1, characterized in that, A hydraulic cylinder (42) is fixedly installed at one end of the conveying pipe (41) away from the left cylinder body (22). A feed piston (43) is installed at the telescopic end of the hydraulic cylinder (42). A feed funnel (45) is installed on the feed pipe (44).

3. The electromagnetic heating rod mill with high hydrothermal dehydration efficiency according to claim 1, characterized in that, The left cylinder (22) is equipped with a centering pipe (221) that connects to the delivery pipe (41), and a retaining ring (222) is fixedly installed at one end of the centering pipe (221) facing the middle cylinder (21).

4. The electromagnetic heating rod mill with high hydrothermal dehydration efficiency according to claim 2, characterized in that, A protective sleeve (431) is fixedly installed at one end of the feed piston (43) away from the left cylinder (22). The length of the protective sleeve (431) is greater than the maximum distance between the feed pipe (44) and the left cylinder (22), and the outer diameter of the protective sleeve (431) is equal to the inner diameter of the conveying pipe (41).

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