Vertical drying tower capable of improving discharging efficiency in manner of circularly stirring coal

Abstract

The invention discloses a vertical drying tower capable of improving the discharging efficiency in a circulating coal stirring mode, and belongs to the technical field of coal mine dust removal equipment. The vertical drying tower comprises a drying chamber which is vertically arranged and provided with a feeding port in the top, a discharging chamber is installed at the bottom of the drying chamber, and a drying machine for supplying air into the drying chamber is installed on the front side portion of the drying chamber; an exhaust fan for exhausting air from the interior of the drying chamber is mounted at the rear side part of the drying chamber; the core improvement point is that a stirring chamber is arranged between the drying chamber and the discharging chamber, and the stirring chamber comprises a stirring frame, a plurality of stirring rollers which are arranged at the same height in the stirring frame at intervals and can rotate, and a synchronous driving mechanism which is arranged outside the stirring frame and can drive all the stirring rollers to rotate synchronously. Coal falling from the drying chamber is circularly stirred through rotation of the stirring rollers, accumulated coal briquettes can be scattered, blockage of large coal blocks and pressure accumulation of the discharging chamber are prevented, the blockage probability of the discharging chamber is remarkably reduced, meanwhile, the fluidity of the coal is improved, and the discharging speed is greatly increased.

Description

Technical Field

[0001] This invention relates to the field of coal drying equipment technology, specifically a vertical drying tower that improves the discharge efficiency of coal by circulating and agitating it. Background Technology

[0002] During coal mining, high-moisture coals, such as lignite, are particularly vulnerable. Their high moisture content means that direct use during combustion leads to significant heat loss due to moisture evaporation, drastically reducing the coal's effective calorific value and resulting in energy waste. Furthermore, high-moisture lignite is prone to mold growth and spontaneous combustion during storage, posing safety hazards. Therefore, in many cases, lignite requires drying in a drying tower after mining to improve its calorific value and storage safety.

[0003] Traditional vertical drying towers typically include a vertical drying chamber, a bottom discharge chamber, a front dryer (for hot air intake), and a rear exhaust fan (for moisture discharge). They often incorporate multiple layers of fixed, slow-falling structures (such as grids and baffles) to prolong the coal's descent time. However, in practical applications, they still have the following problems: The bottom of the discharge chamber is prone to blockage: Due to pressure accumulation in the discharge chamber, the porosity of lignite is significantly reduced, resulting in poor downward flow of coal and easy formation of "bridging" phenomenon (after local accumulation, the material above cannot fall down), which eventually blocks the discharge port, requiring machine shutdown for manual cleaning, affecting continuous production; Blockage is common in the drying chamber: large pieces of lignite can easily get stuck in the gaps of the fixed, slow-falling structure, leading to material accumulation, drying chamber shutdown for cleaning, and thus affecting drying efficiency; Low drying efficiency in the drying chamber: The fixed structure cannot dynamically adjust the contact angle between coal and hot air, resulting in insufficient heating of coal in some areas and high moisture content. Summary of the Invention

[0004] The first technical problem to be solved by the present invention is to provide a vertical drying tower that improves the discharge efficiency of coal by circulating and agitating it. By adding an agitation chamber to dynamically break up blockages, the discharge efficiency is improved by circulating and agitating the coal, thus solving the problem of easy blockage in the discharge chamber of traditional drying towers.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A vertical drying tower that improves coal discharge efficiency by circulating and agitating the coal includes a drying chamber with an inlet at the top and arranged vertically, a discharge chamber at the bottom of the drying chamber, a dryer that supplies air into the drying chamber at the front side of the drying chamber, and an exhaust fan that exhausts air from the drying chamber at the rear side of the drying chamber. The core improvement is that an agitation chamber is installed between the drying chamber and the discharge chamber. The agitation chamber includes an agitation frame, multiple rotating agitator rollers that are spaced apart and installed at the same height inside the agitation frame, and a synchronous drive mechanism installed outside the agitation frame that drives all the agitator rollers to rotate synchronously.

[0006] By adopting the above scheme, the coal falling from the drying chamber is circulated and agitated by the rotation of the stirring roller, which can break up the accumulated coal clumps, prevent large pieces of coal from blocking the discharge chamber and the pressure from accumulating in the discharge chamber, significantly reduce the probability of blockage in the discharge chamber, and at the same time improve the fluidity of the coal and greatly increase the discharge speed.

[0007] As a preferred embodiment of a vertical drying tower that improves the discharge efficiency of coal by circulating agitation, a bottom baffle is installed on the inner side wall of the agitation frame and inclined directly below each agitator. The bottom baffle can effectively support the agitator and further improve the stability and reliability of the agitator.

[0008] As a preferred embodiment of a vertical drying tower that improves the discharge efficiency of coal by circulating and agitating it, the synchronous drive mechanism includes multiple transmission sprockets coaxially connected to the stirring rollers in sequence, multiple driven sprockets rotatably mounted on the outer wall of the agitation frame, a chain I that meshes all the transmission sprockets and driven sprockets, an agitation motor located beside the agitation frame, a drive sprocket coaxially connected to the shaft of the agitation motor, and a chain II that meshes the drive sprocket with any of the driven sprockets. Through chain drive, all stirring rollers rotate synchronously, ensuring consistent speed and direction, guaranteeing that the agitation effect evenly covers the entire cross-section of the agitation chamber, avoiding the accumulation problem caused by un-aggregated coal in certain areas, and greatly improving the uniformity of agitation.

[0009] As a preferred embodiment of a vertical drying tower that improves the discharge efficiency of coal by circulating agitation, the synchronous drive mechanism also includes multiple tension sprockets rotatably mounted on the outer wall of the agitation frame. These tension sprockets can slide up and down, and all tension sprockets are staggered with all driven sprockets. The tension sprockets dynamically adjust the chain tension, compensate for the slack in the chain caused by long-term operation, ensure transmission stability, and extend the service life of the synchronous drive mechanism.

[0010] As a preferred embodiment of a vertical drying tower that improves the discharge efficiency of coal by circulating and agitating it, the discharge chamber includes a discharge cone, a horizontally arranged auger seat is installed at the bottom of the discharge cone, a rotatable auger is installed inside the auger seat, a discharge motor that drives the auger to rotate is installed at one end of the auger seat, and a downward-facing discharge port is opened at the end of the auger seat away from the discharge motor; the auger conveys the dried coal at a uniform speed to avoid discharge blockage; the cone structure prevents material accumulation and greatly improves the discharge efficiency.

[0011] As a preferred embodiment of a vertical drying tower that improves the discharge efficiency of coal by circulating and agitating it, the dryer consists of three units arranged vertically, with the power of the three dryers gradually decreasing from the top right to the bottom. The high-power dryer in the upper layer quickly evaporates surface moisture, while the low-power dryer in the middle and lower layers deeply dries internal moisture. Only one exhaust fan is provided, and the coverage area of ​​this exhaust fan includes the entire air supply area of ​​all three dryers. The single exhaust fan dehumidifies the entire system, resulting in a more stable airflow organization.

[0012] As a preferred embodiment of a vertical drying tower that improves the discharge efficiency of coal by circulating and agitating it, a vertical climbing frame extending from the bottom to the top of the drying chamber is installed on the front side of the drying chamber. An inspection platform 1 adjacent to the vertical climbing frame is installed at the height of the dryer. Work can be carried out on the inspection platform 1 by climbing the vertical climbing frame. Maintenance personnel do not need external scaffolding and can reach the dryer's inspection platform 1 within 5 minutes by climbing the vertical climbing frame, which greatly improves maintenance safety and efficiency.

[0013] As a preferred embodiment of a vertical drying tower that improves the discharge efficiency of coal by circulating and agitating it, an elevator is also installed on one side of the drying chamber. The elevator can realize automated coal conveying and reduce the intensity of manual handling. The elevator extends from the bottom to the top of the drying chamber. At the top of the elevator, it is connected to the feed inlet at the top of the drying chamber through an inclined conveying pipe. The inclined conveying pipe ensures that the material enters the drying chamber evenly.

[0014] In a preferred embodiment of a vertical drying tower that improves coal discharge efficiency through circulating agitation, an overflow pipe extending from the top to the bottom is provided alongside the elevator. The top of this overflow pipe is connected to the top of the conveying pipe via a distribution pipe. When the drying chamber is overfilled with coal, excess coal cannot enter the drying chamber along the conveying pipe and is instead diverted to the bottom through the overflow pipe to avoid blockage.

[0015] As a preferred embodiment of a vertical drying tower that improves the discharge efficiency of coal by circulating and agitating it, a maintenance platform 2 is installed on the top of the elevator. The maintenance platform 2 is directly connected to the top of the drying chamber through an inclined climbing frame. After reaching the top of the drying chamber through the vertical climbing frame, one can quickly reach the maintenance platform 2 along the inclined climbing frame, which facilitates the inspection of the elevator's chain, motor and other components, such as chain tension and belt wear, thereby reducing the downtime failure rate.

[0016] The second technical problem to be solved by the present invention is to provide a vertical drying tower that improves the discharge efficiency of coal by circulating and agitating it. By replacing the fixed structure with a swingable slow-fall component, combined with staggered layout, optimized air guide channel and multi-stage drying design, the coal residence time is significantly extended and the drying uniformity is improved, thus solving the problems of easy blockage and low drying efficiency in the drying chamber of traditional drying towers.

[0017] To achieve the above objectives, the present invention provides the following technical solution: Based on the above scheme, the drying chamber includes multiple layers of slow-fall layers stacked on top of each other. Each slow-fall layer includes a slow-fall frame, multiple slow-fall components installed at intervals inside the slow-fall frame at the same height and capable of swinging left and right, and multiple air outlets opened on the front and rear side walls of the slow-fall frame and facing the drying mechanism and the exhaust mechanism in sequence.

[0018] By adopting the above scheme, in the drying chamber, the impact energy of falling coal drives the slow-falling components to swing and adjust their angle. This indirectly increases the distance between adjacent slow-falling components, preventing coal from getting stuck and greatly reducing the probability of blockage. Secondly, due to the swinging of the slow-falling components, the direction of hot air is dynamically adjusted, thereby adjusting the contact angle between the coal and the hot air, making the coal heated more evenly and further improving the drying efficiency.

[0019] As a preferred embodiment of a vertical drying tower that improves the discharge efficiency of coal by circulating and agitating it, the slow-fall component includes a support rod fixed inside the slow-fall frame and extending back and forth. A slow-fall seat that can swing left and right and reduce the falling coal is rotatably installed on the support rod. The positions of all slow-fall seats in every two adjacent slow-fall layers are staggered vertically. The staggered layout breaks the straight falling trajectory of the coal, which not only reduces the falling speed of the coal, but also forces a change in its direction of movement, further increasing the contact area with hot air and promoting moisture evaporation.

[0020] As a preferred embodiment of a vertical drying tower that improves the discharge efficiency of coal by circulating and agitating it, the left and right edges of the slow-fall seat extend downwards at an angle, and a guide air channel is formed at the bottom of the slow-fall seat for guiding the flow. The guide air channel and the air outlet are on the same straight line. The guide air channel can accurately guide the hot air of the dryer to the coal, which greatly improves the utilization rate of the hot air and accelerates the moisture evaporation rate.

[0021] As a preferred embodiment of a vertical drying tower that improves the discharge efficiency of coal by circulating and agitating it, the cross-section of the air guide channel is an inverted V-shape that slopes downward from the middle to the left and right sides. The opening shape of the air outlet is a triangle similar to the cross-section of the air guide channel. The triangular opening is geometrically matched with the inverted V-shaped channel, which reduces hot air leakage (heat loss) and ensures that all airflow acts on the coal, thereby further achieving energy saving.

[0022] The beneficial effects of this invention are: 1. Improved discharge efficiency of the discharge chamber: The rotating agitator circulates and agitates the coal falling from the drying chamber, which can break up the accumulated coal clumps, prevent large pieces of coal from blocking the discharge chamber and reduce the pressure buildup in the discharge chamber, significantly reducing the probability of blockage in the discharge chamber, while improving the fluidity of the coal and greatly increasing the discharge speed. 2. High agitation stability: The tension sprocket dynamically adjusts the chain tension, compensates for chain slack caused by long-term operation, ensures transmission stability, and extends the service life of the synchronous drive mechanism; 3. High-efficiency drying: Due to the oscillation of the slow-falling components, the direction of the hot air is dynamically adjusted, thereby adjusting the contact angle between the coal and the hot air, making the coal heated more evenly and further improving the drying efficiency; secondly, the staggered layout of the slow-falling components breaks the straight falling trajectory of the coal, which not only reduces the falling speed of the coal, but also forcibly changes its direction of movement, further increasing the contact area with the hot air and promoting moisture evaporation. 4. Reliable anti-clogging in the drying chamber: Inside the drying chamber, the impact energy of falling coal drives the slow-falling components to swing and adjust their angle. This indirectly increases the distance between adjacent slow-falling components, preventing coal from getting stuck and greatly reducing the probability of blockage. 5. Safe and convenient: The built-in climbing frame and maintenance platform shorten maintenance time and significantly reduce operational risks; the overflow pipe protection system of the elevator operates stably. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 Three-dimensional for vertical drying tower Figure 1 ; Figure 2 Three-dimensional for vertical drying tower Figure 2 ; Figure 3 For the three-dimensional mixing chamber and discharge chamber Figure 1 ; Figure 4For the three-dimensional mixing chamber and discharge chamber Figure 2 ; Figure 5 To showcase Figure 4 A three-dimensional view of the internal structure of the mixing chamber and the discharge chamber; Figure 6 for Figure 5 A magnified view of a section at point A in the middle; Figure 7 This is a floor plan of the agitation chamber; Figure 8 for Figure 7 A magnified view of a section at point B in the middle; Figure 9 To showcase Figure 1 A three-dimensional view of the internal structure of the drying chamber; Figure 10 This is a plan view showing multiple layers of gently falling material stacked on top of each other. Figure 11 for Figure 10 A magnified view of a section at point C; Figure 12 A partial 3D view of the top of the hoist.

[0025] In the diagram, the markings are: 1-Drying chamber; 2-Discharge chamber; 3-Dryer; 4-Exhaust fan; 5-Agitation chamber; 6-Agitation frame; 7-Agitating roller; 8-Synchronous drive mechanism; 81-Transmission sprocket; 82-Driven sprocket; 83-Chain one; 84-Agitation motor; 85-Drive sprocket; 86-Chain two; 87-Tension sprocket; 9-Bottom baffle; 10-Slow-fall layer; 11-Slow-fall frame; 12-... - Slow-fall assembly; 121- Support rod; 122- Slow-fall seat; 13- Air outlet; 14- Air guide channel; 15- Discharge cone; 16- Screw seat; 17- Screw auger; 18- Discharge motor; 19- Discharge port; 20- Vertical climbing frame; 21- Maintenance platform one; 22- Hoist; 23- Conveying pipe; 24- Overflow pipe; 25- Distribution pipe; 26- Maintenance platform two; 27- Inclined climbing frame. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] like Figures 1 to 2As shown, a vertical drying tower is provided that improves the discharge efficiency of coal by circulating and agitating it. It is mainly used for drying high-moisture coals such as lignite. Specifically, it includes a drying chamber 1 with a feed inlet at the top and arranged vertically, a discharge chamber 2 installed at the bottom of the drying chamber 1, a dryer 3 (using a conventional dryer) installed on the front side of the drying chamber 1 to supply air into the drying chamber 1, an exhaust fan 4 (using a conventional exhaust fan) installed on the rear side of the drying chamber 1 to exhaust air from the drying chamber 1, and an elevator 22 (using a conventional elevator) installed on one side of the drying chamber 1.

[0028] like Figures 3 to 5 , Figure 7 As shown, an agitation chamber 5 is installed between the drying chamber 1 and the discharge chamber 2. The agitation chamber 5 includes an agitation frame 6, multiple agitator rollers 7 that are spaced apart inside the agitation frame 6 at the same height and can rotate, and a synchronous drive mechanism 8 that is installed outside the agitation frame 6 and can drive all the agitator rollers 7 to rotate synchronously. By rotating the agitator rollers 7, the coal falling from the drying chamber 1 is circulated and agitated, which can break up the accumulated coal clumps, prevent large pieces of coal from blocking the discharge chamber 2 and prevent pressure buildup in the discharge chamber 2, significantly reduce the probability of blockage in the discharge chamber 2, and at the same time improve the fluidity of the coal and greatly increase the discharge speed.

[0029] like Figure 5 As shown, a bottom baffle 9 is installed on the inner side wall of the stirring frame 6 and is inclined directly below each stirring roller 7. The bottom baffle 9 can effectively support the stirring roller 7 and further improve the stability and reliability of the stirring roller 7.

[0030] like Figures 7 to 8 As shown, the synchronous drive mechanism 8 includes multiple transmission sprockets 81 that are coaxially connected to the stirring rollers 7 in sequence, multiple driven sprockets 82 that are rotatably mounted on the outer wall of the stirring frame 6, a chain 83 that meshes all the transmission sprockets 81 and driven sprockets 82, an stirring motor 84 located beside the stirring frame 6, a drive sprocket 85 coaxially connected to the shaft of the stirring motor 84, and a chain 86 that meshes the drive sprocket 85 with any of the driven sprockets 82. The chain drive enables all the stirring rollers 7 to rotate synchronously, making their speeds consistent and their directions the same. This ensures that the stirring action evenly covers the entire cross-section of the stirring chamber 5, avoiding the problem of coal accumulation caused by unstirred areas, and greatly improving the uniformity of stirring.

[0031] Continue as Figures 7 to 8 As shown, the synchronous drive mechanism 8 also includes multiple tension sprockets 87 rotatably mounted on the outer wall of the agitator frame 6. The tension sprockets 87 can slide up and down, and all the tension sprockets 87 are staggered with all the driven sprockets 82. The tension sprockets 87 dynamically adjust the chain tension, compensate for the chain slack caused by long-term operation, ensure transmission stability, and extend the service life of the synchronous drive mechanism 8.

[0032] like Figures 9 to 11 As shown, the drying chamber 1 includes multiple layers of gently falling coal stacked vertically. Each layer of gently falling coal stack 10 includes a gently falling frame 11, multiple gently falling coal components 12 installed at intervals inside the gently falling frame 11 at the same height and capable of swinging left and right, and multiple air outlets 13 opened on the front and rear side walls of the gently falling frame 11 and facing the dryer 3 and the exhaust fan 4 respectively. Inside the drying chamber 1, the impact energy of the falling coal drives the gently falling coal components 12 to swing and adjust their angle. This indirectly increases the distance between adjacent gently falling coal components 12, preventing coal from getting stuck and greatly reducing the probability of blockage. Secondly, due to the swinging of the gently falling coal components 12, the direction of the hot air is dynamically adjusted, thereby adjusting the contact angle between the coal and the hot air, making the coal heated more evenly and further improving the drying efficiency.

[0033] like Figures 10 to 11 As shown, the slow-fall component 12 includes a support rod 121 fixed inside the slow-fall frame 11 and extending back and forth. A slow-fall seat 122 that can swing left and right and reduce the falling coal is rotatably installed on the support rod 121. The positions of all slow-fall seats 122 in every two adjacent slow-fall layers 10 are staggered vertically. The staggered layout breaks the straight falling trajectory of the coal, which can not only reduce the falling speed of the coal, but also forcibly change its direction of movement, further increase the contact area with hot air, and promote moisture evaporation.

[0034] like Figure 11 As shown, the left and right edges of the slow-fall seat 122 extend downwards at an angle, and a guide air channel 14 for guiding airflow is formed at the bottom of the slow-fall seat 122. The guide air channel 14 and the air outlet 13 are on the same straight line. The guide air channel 14 can accurately guide the hot air of the dryer 3 to the coal, which greatly improves the utilization rate of hot air and accelerates the moisture evaporation rate.

[0035] Continue as Figure 11 As shown, the cross-section of the air guide channel 14 is an inverted V-shape that slopes downward from the middle to the left and right sides. The opening shape of the air outlet 13 is a triangle similar to the cross-section of the air guide channel 14. The triangular opening is geometrically matched with the inverted V-shaped channel, which reduces hot air leakage (heat loss) and ensures that the airflow is fully applied to the coal, thereby further achieving energy saving.

[0036] like Figures 3 to 5 As shown, the discharge chamber 2 includes a discharge cone 15, a horizontally arranged auger seat 16 is installed at the bottom of the discharge cone 15, a rotatable auger 17 is installed inside the auger seat 16, a discharge motor 18 that drives the auger 17 to rotate is installed at one end of the auger seat 16, and a downward-facing discharge port 19 is opened at the end of the auger seat 16 away from the discharge motor 18; the auger 17 conveys the dried coal at a uniform speed to avoid discharge blockage; the cone structure prevents material accumulation and greatly improves discharge efficiency.

[0037] like Figures 1 to 2As shown, there are three dryers 3, arranged vertically, with the power of the three dryers 3 gradually decreasing from the top right to the bottom. The upper high-power dryer 3 quickly evaporates surface moisture, while the middle and lower low-power dryers deeply dry the internal moisture. There is only one exhaust fan 4, and the coverage area of ​​the exhaust fan 4 includes the entire air supply area of ​​the three dryers 3. The single exhaust fan 4 dehumidifies the air, resulting in a more stable airflow organization.

[0038] Continue as Figures 1 to 2 As shown, a vertical climbing frame 20 extending from the bottom to the top of the drying chamber 1 is installed on the front side of the drying chamber 1. A maintenance platform 21 adjacent to the vertical climbing frame 20 is installed at the height of the dryer 3. The maintenance personnel can climb to the maintenance platform 21 via the vertical climbing frame 20 to work. Maintenance personnel do not need external scaffolding and can reach the maintenance platform 21 of the dryer 3 within 5 minutes via the vertical climbing frame 20, which greatly improves maintenance safety and efficiency.

[0039] like Figures 1 to 2 , Figure 12 As shown, the elevator 22 extends from the bottom of the drying chamber 1 to the top of the drying chamber 1. At the top of the elevator 22, it is connected to the feed inlet at the top of the drying chamber 1 through an inclined conveying pipe 23. The inclined conveying pipe 23 ensures that the material enters the drying chamber 1 evenly.

[0040] like Figure 12 As shown, an overflow pipe 24 extending from the top to the bottom of the elevator 22 is also provided on one side. The top of the overflow pipe 24 is connected to the top of the conveying pipe 23 through a distribution pipe 25. When the drying chamber 1 is too full of coal, the excess coal cannot enter the drying chamber 1 along the conveying pipe 23. At this time, it is diverted to the bottom through the overflow pipe 24 to avoid material blockage.

[0041] like Figures 1 to 2 As shown, a maintenance platform 26 is installed on the top of the hoist 22. The maintenance platform 26 is directly connected to the top of the drying chamber 1 via an inclined climbing frame 27. After reaching the top of the drying chamber 1 via the vertical climbing frame 20, the maintenance platform 26 can be quickly reached along the inclined climbing frame 27. This facilitates the inspection of components of the hoist 22, such as the chain and motor, including chain tension and belt wear, thereby reducing downtime failure rate.

[0042] The working principle of this vertical drying tower that improves the discharge efficiency by circulating and agitating the coal is as follows: Feeding: Lignite is conveyed to the top via elevator 22 and falls into the feed inlet of drying chamber 1 via conveying pipe 23; Drying process: When the coal falls, it is blocked multiple times by the slow-fall seats 122 of the multi-layer slow-fall layer 10. The impact energy of the falling coal drives the slow-fall component 12 to swing to adjust its angle. At this time, the distance between adjacent slow-fall components 12 will be indirectly increased, avoiding the coal from being blocked and greatly reducing the probability of blockage. The dryer 3 sends hot air into the air passage 14 through the air outlet 13 and the exhaust fan 4 discharges the moisture. The staggered layout of the slow-fall component 12 breaks the straight falling trajectory of the coal, which can not only reduce the falling speed of the coal, but also forcibly change its movement direction, further increasing the contact area with the hot air and promoting moisture evaporation. Stirring and anti-clogging: After the coal falls into the stirring chamber 5, the stirring roller 7 rotates synchronously and circulates the coal under the drive of the synchronous drive mechanism 8, breaking up the lumps of coal and breaking up the piled-up clumps, preventing large pieces of coal from blocking and pressure accumulation in the discharge chamber 2, significantly reducing the probability of blockage in the discharge chamber 2, while improving the fluidity of the coal and greatly increasing the discharge speed. Discharge: The coal then falls into the discharge cone 15 and is pushed by the rotating screw conveyor 17 to the discharge port 19 for discharge; Maintenance: Maintenance personnel can access maintenance platform 1 (dryer 3 area) or maintenance platform 26 (elevator 22 area) via climbing frame to perform routine maintenance.

[0043] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vertical drying tower for improving the discharge efficiency of coal by circulating and agitating it, comprising a drying chamber with a feed inlet at the top and arranged vertically, a discharge chamber installed at the bottom of the drying chamber, a dryer for supplying air into the drying chamber installed at the front of the drying chamber, and an exhaust fan for discharging air from the drying chamber installed at the rear of the drying chamber; characterized in that: An agitation chamber is installed between the drying chamber and the discharge chamber. The agitation chamber includes an agitation frame, multiple agitators that are spaced apart inside the agitation frame at the same height and can rotate, and a synchronous drive mechanism installed outside the agitation frame that can drive all agitators to rotate synchronously.

2. The vertical drying tower according to claim 1, which improves the discharge efficiency of coal by circulating and agitating it, is characterized in that, A bottom baffle, which is installed on the inner side wall of the agitation frame and is inclined, is provided directly below each agitator roller.

3. The vertical drying tower according to claim 1, which improves the discharge efficiency of coal by circulating and agitating it, is characterized in that... The synchronous drive mechanism includes multiple transmission sprockets that are coaxially connected to the stirring roller in sequence, multiple driven sprockets that are rotatably mounted on the outer wall of the stirring frame, a chain I that meshes all the transmission sprockets and driven sprockets, an stirring motor located beside the stirring frame, a drive sprocket coaxially connected to the rotating shaft of the stirring motor, and a chain II that meshes the drive sprocket with any of the driven sprockets.

4. The vertical drying tower according to claim 3, which improves the discharge efficiency of coal by circulating and agitating it, is characterized in that... The synchronous drive mechanism also includes multiple tension sprockets rotatably mounted on the outer wall of the agitator frame. These tension sprockets can slide up and down, and all tension sprockets are staggered with all driven sprockets.

5. The vertical drying tower according to claim 1, which improves the discharge efficiency of coal by circulating and agitating it, is characterized in that... The drying chamber includes multiple layers of slow-fall layers stacked on top of each other. Each slow-fall layer includes a slow-fall frame, multiple slow-fall components installed at intervals inside the slow-fall frame at the same height and capable of swinging left and right, and multiple air outlets opened on the front and rear side walls of the slow-fall frame and facing the drying mechanism and the exhaust mechanism in sequence.

6. The vertical drying tower according to claim 5, which improves the discharge efficiency of coal by circulating and agitating it, is characterized in that... The slow-fall assembly includes a support rod fixed inside the slow-fall frame and extending forward and backward. A slow-fall seat that can swing left and right and reduce the fall of coal is rotatably installed on the support rod. The positions of all slow-fall seats in every two adjacent slow-fall layers are staggered vertically.

7. The vertical drying tower for improving the discharge efficiency of coal by circulating and agitating it according to claim 6, characterized in that, The left and right edges of the slow-fall seat extend downwards at an angle, forming an air guide channel at the bottom of the slow-fall seat for guiding airflow. The air guide channel and the air outlet are on the same straight line. The cross-section of the air guide channel is an inverted V-shape that slopes downwards from the middle to the left and right sides. The opening shape of the air outlet is a triangle similar to the cross-section of the air guide channel.

8. The vertical drying tower according to claim 1, which improves the discharge efficiency of coal by circulating and agitating it, is characterized in that, The discharge chamber includes a discharge cone, a horizontally arranged auger seat is installed at the bottom of the discharge cone, a rotatable auger is installed inside the auger seat, a discharge motor that drives the auger to rotate is installed at one end of the auger seat, and a downward-facing discharge port is opened at the end of the auger seat away from the discharge motor.

9. The vertical drying tower according to claim 1, which improves the discharge efficiency of coal by circulating agitation, is characterized in that, There are three dryers arranged vertically, with the power of the three dryers gradually decreasing from the top right to the bottom; there is only one exhaust fan, and the coverage area of ​​the exhaust fan includes the entire air supply area of ​​the three dryers.

10. The vertical drying tower according to claim 1, which improves the discharge efficiency of coal by circulating and agitating it, is characterized in that, A hoist is installed on one side of the drying chamber, extending from the bottom to the top of the drying chamber. The top of the hoist is connected to the inlet at the top of the drying chamber via an inclined conveying pipe. An overflow pipe extending from the top to the bottom of the hoist is also provided on one side of the hoist, and the top of the overflow pipe is connected to the top of the conveying pipe via a distribution pipe.

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