A flash drying device for rapid dehydration in kaolin processing

Abstract

This invention discloses a flash drying device for rapid dehydration of kaolin, belonging to the field of flash drying technology for kaolin. The invention includes a vertically placed flash drying tank. A hot air distribution seat is fixedly installed on the lower outer side of the flash drying tank, and an air inlet pipe is fixedly connected to the outer side of the hot air distribution seat. An exhaust pipe is fixedly connected to the upper outer side of the flash drying tank. A feeding assembly is also fixedly installed on the outer side of the flash drying tank. A crushing motor is fixedly installed at the lower end of the hot air distribution seat, and a rotating shaft is fixedly installed at the output end of the crushing motor. A turning and throwing assembly for agitating the kaolin is installed on the inner side of the hot air distribution seat. This flash drying device for rapid dehydration of kaolin can repeatedly turn and throw the material during the crushing process, effectively improving the crushing effect of the blades on the material. Simultaneously, it can disturb the airflow inside the tank, prolonging the material's floating time and improving the drying effect.

Description

Technical Field

[0001] This invention relates to the field of flash drying technology for kaolin, specifically to a flash drying device for rapid dehydration in kaolin processing. Background Technology

[0002] Kaolin (whose main component is aluminum silicate) usually contains high moisture content (20%~40%) after mining, and has fine particles and high viscosity. Therefore, flash drying equipment is needed to quickly dehydrate and dry the material.

[0003] Existing technology (Chinese patent publication number: CN210197868U, publication date: 2020-03-27) discloses a novel rotary flash dryer for kaolin, comprising a drying shell, a guide feed rack structure, a drying chamber, a feed hopper, a guide frame, a feeding hopper, a heating blower structure, a shock-absorbing and reinforced base structure, a drive motor, openings, a rotating tube, spiral feeding blades, a discharge frame, and a storage hopper. The guide feed rack structure is installed on the upper part of the drying shell; the feed hopper is inserted into the upper part of the drying chamber; the guide frame is inserted into the upper left side of the drying shell; and the feeding hopper is inserted into the upper left side of the guide frame. The positioning rod and buffer spring on the horizontal base plate of this invention facilitate cushioning and shock absorption at the bottom of the dryer during use; the annular heating tubes are specifically made of copper electric heating tubes, and two annular heating tubes are provided to facilitate heating the gas blown out by the blower during use.

[0004] The prior art (Chinese patent publication number: CN218764254U, publication date: 2023-03-28) discloses a high-efficiency rotary flash dryer, including a fixed box. The main body is set on the top of the fixed box, and a fixed column is set in the inner cavity of the main body. The top and bottom of the fixed column are movably connected to the inner wall of the main body through bearings. This utility model protects the internal components by setting a fixed box, provides a drying space for materials by setting a main body, fixes the stirring blades, fixed sleeves and fixed plates by setting a fixed column, and lifts up the material accumulated at the bottom of the main body by setting a flip plate, thereby preventing the material from accumulating at the bottom of the main body. This solves the problem that when the air volume of the dryer is small, larger particles will settle at the bottom of the main body, causing the main body stirring current to overload and stop. The rotary flash dryer can only operate normally after the material at the bottom of the dryer is cleaned, which reduces the production capacity of the dryer.

[0005] Existing flash drying equipment has a fixed bottom structure, which reduces the probability of contact between larger particles and the crushing parts when they fall to the bottom of the tank. This results in reduced crushing efficiency and affects the dehydration and drying effect, thus presenting certain defects in use. Summary of the Invention

[0006] The purpose of this invention is to provide a flash drying device for rapid dehydration of kaolin, in order to solve the problem mentioned in the background art that the bottom structure of the tank of the flash drying device on the market is fixed, which reduces the probability of contact between larger particles and the crushing parts when they fall to the bottom of the tank, thereby reducing the crushing efficiency of the material and affecting the dehydration and drying effect.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a flash drying device for rapid dehydration of kaolin, comprising a vertically placed flash drying tank, a hot air distribution seat fixedly installed on the lower outer side of the flash drying tank, an air inlet pipe fixedly connected to the outer side of the hot air distribution seat, and an exhaust pipe fixedly connected to the upper outer side of the flash drying tank; a feeding assembly fixedly installed on the outer side of the flash drying tank; a crushing motor fixedly installed at the lower end of the hot air distribution seat, a rotating shaft fixedly installed at the output end of the crushing motor, a first blade for crushing kaolin fixedly installed on the outer side of the rotating shaft, a turning and throwing assembly for throwing kaolin installed on the inner side of the hot air distribution seat, and an air supply assembly for driving the turning and throwing assembly also provided on the inner side of the hot air distribution seat; and a turbulence assembly for achieving gas turbulence is also provided on the outer side of the rotating shaft.

[0008] Preferably, the feeding assembly includes a conveying cylinder that is fixedly installed through the side wall of the flash drying tank, and a hopper is fixedly connected above the conveying cylinder, and an auger for conveying materials is installed inside the conveying cylinder.

[0009] Preferably, the gas delivery assembly includes a piston cylinder fixedly installed inside the hot air distribution seat, and a piston plate is slidably installed on the inner side of the piston cylinder with interference fit. A pull rod is fixedly installed on the upper end of the piston plate, and the upper end of the pull rod passes through the piston cylinder and forms a lifting structure with the piston cylinder. A first spring is fixedly connected between the inner wall of the piston cylinder and the piston plate.

[0010] Preferably, the upper end of the pull rod is spherical, and a spiral guide rod is symmetrically arranged on the outer side of the rotating shaft. During the rotation of the rotating shaft, the guide rod is driven to slide to the top of the support pull rod, so as to push the top of the pull rod to slide along the guide rod for lifting and lowering adjustment.

[0011] Preferably, the lower end of the piston cylinder is fixedly connected to an air supply pipe, the turning and throwing assembly includes a rotating seat rotatably mounted on the inner wall of the hot air distribution seat, and an elastic sheet is fixedly connected between the rotating seat and the hot air distribution seat. The lower end of the air supply pipe is fixedly connected to the lower part of the hot air distribution seat. At the same time, the air supply pipe extracts air between the hot air distribution seat and the elastic sheet to stretch the elastic sheet. The material is turned and thrown during the recovery process of the elastic sheet.

[0012] Preferably, a second spring is uniformly and fixedly connected between the rotating seat and the hot air distribution seat, and the elastic sheet is stretched and wrinkled under the rotation and twisting of the rotating seat, and the elastic sheet drives the rotating seat to rotate elastically when it is stretched and deformed under air pressure.

[0013] Preferably, a second blade is installed above the rotating seat, and the first blade and the second blade are fitted with a clearance, and the first blade and the second blade rotate in opposite directions, while the first blade and the second blade cut the falling large particles of material from opposite directions.

[0014] Preferably, the turbulence assembly includes a fixed cover fixedly installed on the outside of the rotating shaft, and a third blade is symmetrically installed on the fixed cover, with the lower end of the third blade attached to an elastic film.

[0015] Preferably, the fixed cover is also symmetrically spherically connected with movable spoilers, and a third spring is fixedly connected between the end of the movable spoiler located inside the fixed cover and the inner wall of the upper end of the fixed cover. Furthermore, a fixed ring with an annular structure is fixedly installed on the outer side of the upper end of the two pull rods. At the same time, during the upward movement of the fixed ring, it pushes the end of the movable spoiler located inside the fixed cover to make it rotate elastically.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the flash drying equipment for kaolin processing that can quickly dehydrate can repeatedly turn and throw the material during the crushing process, which effectively improves the crushing effect of the blades on the material. At the same time, it can disturb the airflow inside the tank and prolong the floating time of the material to improve the drying effect. The specific details are as follows.

[0017] 1. Equipped with a piston cylinder and elastic sheet, the rotating shaft drives the guide rod to move synchronously. The guide rod guides and pushes the pull rod for lifting and lowering adjustment, causing the pull rod to drive the piston plate to slide back and forth inside the piston cylinder. This allows the piston cylinder to draw gas between the hot air distribution seat and the elastic sheet, enabling the elastic sheet to elastically deform and pull down under negative pressure. When the elastic sheet returns to its original position, it can tumble and throw the material particles through its own material elasticity, thereby increasing the contact rate between the material and the blade and improving the crushing effect of the material.

[0018] 2. It is equipped with a first blade, an elastic sheet, and a second blade. As the elastic sheet stretches and returns to its original position, it can drive the rotating seat to rotate elastically, which in turn drives the second blade on its outer side to rotate synchronously. This allows the second blade to work with the first blade to cut and crush the material that is thrown up and falling, further improving the crushing effect of the material.

[0019] 3. Equipped with a pull rod and a movable spoiler, the pull rod, when raised or lowered, causes the top fixed ring to move synchronously. As the fixed ring moves upward, it contacts and pushes the movable spoiler at one end inside the fixed cover, causing the movable spoiler to rotate and swing elastically. This generates wind force, which disturbs the airflow of the hot air distribution seat, thereby extending the drying time of the material and further improving the drying effect of the kaolin material. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the main cross-sectional structure of the present invention;

[0022] Figure 3 This is a partial cross-sectional view of the present invention;

[0023] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle;

[0024] Figure 5 This is a top view of the hot air distribution seat of the present invention;

[0025] Figure 6 This is a schematic diagram of the rotating seat mounting structure of the present invention;

[0026] Figure 7 This is a cross-sectional view of the piston cylinder and the fixing cover of the present invention;

[0027] Figure 8 For the present invention Figure 7 Enlarged structural diagram at point B;

[0028] Figure 9 This is a schematic diagram of the piston plate mounting structure of the present invention;

[0029] Figure 10 This is a schematic diagram of the connection structure between the rotating base and the elastic film of the present invention;

[0030] Figure 11 This is a diagram showing the initial wrinkled state of the elastic film.

[0031] Figure 12 This is a diagram showing the flat state of the elastic film after it has been stretched.

[0032] In the diagram: 1. Flash drying tank; 2. Hot air distribution seat; 3. Air inlet pipe; 4. Air outlet pipe; 5. Conveyor cylinder; 6. Hopper; 7. Screwdriver; 8. Crushing motor; 9. Rotary shaft; 10. First blade; 11. Guide rod; 12. Piston cylinder; 13. Piston plate; 14. Pull rod; 15. First spring; 16. Air delivery pipe; 17. Rotating seat; 18. Elastic sheet; 19. Second spring; 20. Second blade; 21. Fixing ring; 22. Fixing cover; 23. Third blade; 24. Movable baffle; 25. Third spring. Detailed Implementation

[0033] 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.

[0034] Example 1: In existing flash drying equipment for kaolin processing, large particles cannot fully contact the blades after falling to the bottom, resulting in limited crushing effect. To solve this technical problem, this example discloses the following technical content. Please refer to [link / reference]. Figures 1-7 and Figure 10 As shown;

[0035] A flash drying device for rapid dehydration of kaolin processing includes a vertically placed flash drying tank 1. A hot air distribution seat 2 is fixedly installed on the lower outer side of the flash drying tank 1, and an air inlet pipe 3 is fixedly connected to the outer side of the hot air distribution seat 2. An exhaust pipe 4 is fixedly connected to the upper outer side of the flash drying tank 1. A feeding assembly is also fixedly installed on the outer side of the flash drying tank 1. A crushing motor 8 is fixedly installed at the lower end of the hot air distribution seat 2, and a rotating shaft 9 is fixedly installed at the output end of the crushing motor 8. A first blade 10 for crushing kaolin is fixedly installed, and a turning and throwing component for throwing kaolin is installed inside the hot air distribution seat 2. An air conveying component for driving the turning and throwing component is also provided inside the hot air distribution seat 2. The feeding component includes a conveying cylinder 5 that is fixedly installed through the side wall of the flash drying tank 1, and a hopper 6 is fixedly connected above the conveying cylinder 5. An auger 7 for conveying materials is installed inside the conveying cylinder 5. The air conveying component includes a piston cylinder 12 fixedly installed inside the hot air distribution seat 2. A piston plate 13 is interference-fitted and slidably mounted on the inner side of the piston cylinder 12, and a pull rod 14 is fixedly mounted on the upper end of the piston plate 13. The upper end of the pull rod 14 passes through the piston cylinder 12 and forms a lifting structure with the piston cylinder 12. A first spring 15 is fixedly connected between the inner wall of the piston cylinder 12 and the piston plate 13. The upper end of the pull rod 14 has a spherical structure, and a spiral guide rod 11 is symmetrically arranged on the outer side of the rotating shaft 9. During the rotation of the rotating shaft 9, the guide rod 11 rotates synchronously. The rotation of 1 pushes the top of the pull rod 14 to slide along the guide rod 11, so that the pull rod 14 can be adjusted up and down. The lower end of the piston cylinder 12 is fixedly connected to the air supply pipe 16. The tumbling assembly includes a rotating seat 17 rotatably installed on the inner wall of the hot air distribution seat 2, and an elastic sheet 18 is fixedly connected between the rotating seat 17 and the hot air distribution seat 2. The lower end of the air supply pipe 16 is fixedly connected to the lower part of the hot air distribution seat 2. The air supply pipe 16 connects the piston cylinder 12 and the sealed space formed between the hot air distribution seat 2 and the elastic sheet 18.Simultaneously, the air supply pipe 16 extracts air between the hot air distribution seat 2 and the elastic sheet 18. The elastic sheet 18 is initially wrinkled. When the air supply pipe 16 extracts air from both, the air pressure between them decreases, causing the elastic sheet 18 to flatten under negative pressure, thus stretching it. When the air supply pipe 16 supplies air between the hot air distribution seat 2 and the elastic sheet 18, the elastic sheet 18 returns to its original state. During this recovery process, the material is tossed and turned. A second spring 19 is evenly and fixedly connected between the rotating seat 17 and the hot air distribution seat 2. The elastic sheet 18 is stretched and wrinkled under the rotation and twisting of the rotating seat 17 (the second spring 19 connects the rotating seat 17 and the hot air distribution seat 2, and the rotating seat 17 is stretched by the elastic force of the second spring 19). Under the action of air pressure, the elastic film 18 rotates elastically, thereby driving the outer ring of the elastic film 18 to rotate synchronously. This causes the inner and outer rings of the elastic film 18 to rotate axially relative to each other, resulting in the elastic film 18 twisting and wrinkling. When the elastic film 18 is stretched and deformed under air pressure, it drives the rotating seat 17 to rotate elastically. A second blade 20 is installed above the rotating seat 17, and the first blade 10 and the second blade 20 are fitted with a clearance. The first blade 10 and the second blade 20 rotate in opposite directions. At the same time, the first blade 10 and the second blade 20 cut large particles of material falling from opposite directions. The turbulence component includes a fixed cover 22 fixedly installed on the outside of the rotating shaft 9, and a third blade 23 is symmetrically installed on the fixed cover 22. The lower end of the third blade 23 is attached to the elastic film 18.

[0036] Turn on the hot air supply device connected to the outside of the air inlet pipe 3, so that hot air enters the inside of the flash drying tank 1 through the hot air distribution seat 2. At the same time, start the auger 7, so that the auger 7 can transport the kaolin raw material in the hopper 6 to the inside of the flash drying tank 1 through the conveyor cylinder 5. At the same time, start the crushing motor 8, so that the crushing motor 8 drives the first blade 10 to crush the material through the rotating shaft 9. As the rotating shaft 9 rotates, it will drive the guide rod 11 connected to the outside to rotate synchronously, so that the guide rod 11 will contact the ball at the top of the pull rod 14. This causes the top of the pull rod 14 to slide along the guide rod 11, thereby causing the pull rod 14 to drive the piston plate 13 to move up and down inside the piston cylinder 12. At this time, the piston cylinder 12 will draw gas between the hot air distribution seat 2 and the elastic sheet 18 through the air supply pipe 16, creating a negative pressure between them. Under this negative pressure, the elastic sheet 18 will undergo downward stretching deformation (the elastic sheet 18 is initially wrinkled; the elastic sheet 18 is made of composite rubber material, which has good sealing and elasticity). At the same time, the wrinkles of the elastic sheet 18 can be... The surface becomes flat due to stretching, thereby driving the rotating seat 17 to rotate synchronously and elastically (the elastic sheet 18 is a ring structure, and initially it is wrinkled, so there is an axial angle deviation between the inner and outer rings of the elastic sheet 18. When the elastic sheet 18 is stretched, the wrinkles of the elastic sheet 18 gradually flatten, causing its outer ring to rotate, thereby driving the rotating seat 17 to rotate). When the top of the pull rod 14 disengages from the highest point of the guide rod 11, the piston plate 13 will reset, causing the air pipe 16 to supply air to the hot air distribution seat 2 and the elastic sheet 18. Air is supplied intermittently, restoring the air pressure between the two. At this time, the elastic sheet 18 will eject the material above it under the action of its own material elasticity, realizing the tumbling and throwing of the material. The thrown material will move onto the movement trajectory of the first blade 10, thereby achieving further crushing. At the same time, when the elastic sheet 18 returns to its original state, the rotating seat 17 will perform elastic rotation and reset, thereby driving the second blade 20 on its outer side to rotate simultaneously. This allows the first blade 10 and the second blade 20 to cut the material from opposite directions, thereby further improving the crushing effect. Figure 11 and attached Figure 12 The position of the letter 'a' in the diagram represents two relatively close points between the hot air distribution seat 2 and the rotating seat 17. The change in the position of the position of the letter 'a' indicates the rotational change of the rotating seat 17.

[0037] Example 2: The technical content disclosed in this example is a further improvement based on Example 1. In existing flash drying equipment for kaolin processing, the airflow is always upward, resulting in a short floating time for small particles, often leading to insufficient drying. To further solve this technical problem, this example discloses the following technical content: Figures 7-9As shown; a turbulence component for realizing gas turbulence is also provided on the outer side of the rotating shaft 9. A movable turbulence plate 24 is symmetrically connected to the fixed cover 22. A third spring 25 is fixedly connected between the end of the movable turbulence plate 24 located inside the fixed cover 22 and the inner wall of the upper end of the fixed cover 22. A ring-shaped fixed ring 21 is fixedly installed on the outer side of the upper end of the two pull rods 14. At the same time, during the upward movement of the fixed ring 21, it pushes the end of the movable turbulence plate 24 located inside the fixed cover 22 to make it rotate elastically.

[0038] As the pull rod 14 reciprocates and rises, the fixed ring 21 at the top of the pull rod 14 moves up to contact and push the movable baffle 24 to one end inside the fixed cover 22, allowing the movable baffle 24 to rotate elastically. During the rotation of the movable baffle 24, a vortex different from the air outlet direction of the hot air distribution seat 2 is generated, thereby disturbing the hot airflow and prolonging the time that the particulate raw material floats inside the flash drying tank 1, thus improving the rapid and thorough drying of kaolin.

[0039] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A flash drying device for rapid dehydration of kaolin, comprising a vertically placed flash drying tank (1), a hot air distribution seat (2) fixedly installed on the lower outer side of the flash drying tank (1), an air inlet pipe (3) fixedly connected to the outer side of the hot air distribution seat (2), and an exhaust pipe (4) fixedly connected to the upper outer side of the flash drying tank (1), and a feeding assembly fixedly installed on the outer side of the flash drying tank (1); Its features are, The lower end of the hot air distribution seat (2) is fixedly installed with a crushing motor (8), and the output end of the crushing motor (8) is fixedly installed with a rotating shaft (9). The outer side of the rotating shaft (9) is fixedly installed with a first blade (10) for crushing kaolin. The inner side of the hot air distribution seat (2) is installed with a turning and throwing component for throwing kaolin. The inner side of the hot air distribution seat (2) is also provided with a gas supply component for driving the turning and throwing component. The outer side of the rotating shaft (9) is also provided with a turbulence component for realizing gas turbulence. The gas delivery assembly includes a piston cylinder (12) fixedly installed inside the hot air distribution seat (2), and a piston plate (13) is interference-slidably installed on the inner side of the piston cylinder (12), and a pull rod (14) is fixedly installed on the upper end of the piston plate (13). At the same time, the upper end of the pull rod (14) passes through the piston cylinder (12) and forms a lifting structure with the piston cylinder (12). A first spring (15) is fixedly connected between the inner wall of the piston cylinder (12) and the piston plate (13). The upper end of the pull rod (14) is spherical, and a spiral guide rod (11) is symmetrically arranged on the outer side of the rotating shaft (9). During the rotation of the rotating shaft (9), the guide rod (11) is driven to slide to the top of the support pull rod (14) so ​​as to push the top of the pull rod (14) to slide along the guide rod (11) for lifting and lowering adjustment. The lower end of the piston cylinder (12) is fixedly connected to an air supply pipe (16). The turning and throwing assembly includes a rotating seat (17) rotatably installed on the inner wall of the hot air distribution seat (2). An elastic sheet (18) is fixedly connected between the rotating seat (17) and the hot air distribution seat (2). The lower end of the air supply pipe (16) is fixedly connected to the lower part of the hot air distribution seat (2). At the same time, the air supply pipe (16) extracts the air between the hot air distribution seat (2) and the elastic sheet (18) to stretch the elastic sheet (18). During the recovery process of the elastic sheet (18), the material is turned and thrown. The air supply pipe (16) connects the piston cylinder (12) and the sealed space formed between the hot air distribution seat (2) and the elastic sheet (18). A second spring (19) is uniformly fixed between the rotating seat (17) and the hot air distribution seat (2), and the elastic sheet (18) is stretched and wrinkled under the rotation and twisting of the rotating seat (17), and the elastic sheet (18) drives the rotating seat (17) to rotate elastically when it is stretched and deformed under air pressure.

2. The flash drying equipment for rapid dehydration of kaolin processing according to claim 1, characterized in that: The feeding assembly includes a feeding cylinder (5) that is fixedly installed through the side wall of the flash drying tank (1), and a hopper (6) is fixedly connected above the feeding cylinder (5), and an auger (7) for conveying materials is installed inside the feeding cylinder (5).

3. The flash drying equipment for rapid dehydration of kaolin processing according to claim 1, characterized in that: The second blade (20) is installed above the rotating seat (17), and the first blade (10) and the second blade (20) are fitted together with a gap, and the first blade (10) and the second blade (20) rotate in opposite directions. At the same time, the first blade (10) and the second blade (20) cut the falling large particles of material from opposite directions.

4. The flash drying equipment for rapid dehydration of kaolin processing according to claim 1, characterized in that: The turbulence assembly includes a fixed cover (22) fixedly installed on the outside of the rotating shaft (9), and a third blade (23) is symmetrically installed on the fixed cover (22), and the lower end of the third blade (23) is attached to the elastic film (18).

5. A flash drying device for rapid dehydration in kaolin processing according to claim 4, characterized in that: The fixed cover (22) is also symmetrically connected with a movable spoiler (24), and a third spring (25) is fixedly connected between the end of the movable spoiler (24) located inside the fixed cover (22) and the inner wall of the upper end of the fixed cover (22). A ring-shaped fixed ring (21) is fixedly installed on the outer side of the upper end of the two pull rods (14). At the same time, the fixed ring (21) pushes the end of the movable spoiler (24) located inside the fixed cover (22) to make it rotate elastically during the upward movement.

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