A drying device for processing limestone powder

Abstract

This invention relates to the field of limestone powder drying technology and discloses a drying device for limestone powder processing, including a drying cylinder, an air guide pipe, and a driving component. An inner cylinder is fixed inside the drying cylinder, forming a hot air chamber between them. An air passage is fixed to the top of the drying cylinder, and a material discharge cylinder is fixed inside the air passage, forming an air passage chamber between them. An air inlet pipe communicating with the air passage chamber is connected to the outer periphery of the air passage. The air guide pipe is connected between the drying cylinder and the air passage, and its two ends are respectively connected to the air passage chamber and the hot air chamber. An exhaust pipe communicating with the hot air chamber is connected to the outer periphery of the drying cylinder. A material discharge port, offset and communicating with the inner cylinder, is opened at the bottom of the material discharge cylinder. This invention heats limestone powder through hot air circulation, and utilizes the rotation of a V-shaped agitator and agitator to achieve intermittent feeding, crushing, cutting, and heating. Simultaneously, hot air is delivered to the center of the material through a hollow pipe to prevent agglomeration, improve drying quality and efficiency, and reduce energy consumption.

Description

Technical Field

[0001] This invention relates to the field of limestone powder drying technology, and more particularly to a drying device for limestone powder processing. Background Technology

[0002] During the mining, crushing, and grinding processes, limestone powder often contains a certain amount of moisture. The presence of this moisture has many adverse effects on the subsequent application of limestone powder. First, moisture reduces the activity of limestone powder, affecting its performance in building materials, chemical raw materials, and other applications. Second, the presence of moisture increases the transportation cost and storage difficulty of limestone powder, as excess moisture increases its weight and volume, and is prone to clumping during storage, affecting its fluidity. Therefore, it is necessary to dry limestone powder during the production process to remove excess moisture, improve its purity and activity, reduce its weight and volume, improve its fluidity, and facilitate transportation and storage.

[0003] In the drying process of limestone powder, the common practice is to pour the limestone powder into the drying box all at once. Although the drying box is equipped with a stirring device, the limestone powder itself contains moisture, so it is still easy for it to clump during the drying process. This clumping will cause uneven heating of the limestone powder, thus affecting the drying effect. In particular, the limestone powder in the middle will be heated even less, which will affect the drying quality of the limestone powder.

[0004] To address the aforementioned problems, this application proposes a drying device for limestone powder processing. Summary of the Invention

[0005] This invention proposes a drying device for limestone powder processing, which solves the problem in related technologies where limestone powder is poured into the drying box all at once during drying. Although there is a stirring device, the powder is prone to clumping due to its moisture content, resulting in uneven heating, with the powder in the middle receiving less heat, thus affecting the drying effect and quality.

[0006] The present invention provides a drying device for limestone powder processing, comprising a drying cylinder, an air guide pipe, and a driving component;

[0007] The drying cylinder has an inner cylinder fixed inside, forming a hot air cavity between them. The top of the drying cylinder has an air passage duct fixed inside, and a material discharge cylinder is fixed inside the air passage duct, forming an air passage cavity between them. An air inlet pipe communicating with the air passage cavity is connected to the outer periphery of the air passage duct. An air guide pipe is connected between the drying cylinder and the air passage duct, and both ends of the air guide pipe are respectively connected to the air passage cavity and the hot air cavity. An exhaust pipe communicating with the hot air cavity is connected to the outer periphery of the drying cylinder.

[0008] The bottom of the discharge cylinder has an offset discharge port that communicates with the inner cylinder. A vertically arranged hollow tube is installed inside the inner cylinder and extends into the discharge cylinder. A disturbance component and a V-shaped agitator are installed on the hollow tube. The disturbance component is located inside the discharge cylinder, and the V-shaped agitator is located inside the inner cylinder. The inner wall of the inner cylinder is equipped with multiple circumferentially arranged arc-shaped protrusions. The hollow tube is driven by a driving component to drive the disturbance component and the V-shaped agitator to rotate synchronously. When the V-shaped agitator passes the arc-shaped protrusions, it elastically deforms and crushes large pieces of material.

[0009] As a further optimization of the present invention, the V-shaped agitator includes an agitator plate, a movable plate, and an elastic sheet. Multiple agitator plates arranged circumferentially and located in the inner cylinder are installed on the hollow tube. The movable plate is hinged to the side of the agitator plate, and the agitator plate and the movable plate form a V-shaped structure. An elastic sheet is connected between the agitator plate and the movable plate. The length of the movable plate is greater than the length of the agitator plate, and it is used to contact the arc-shaped protrusion when passing through it.

[0010] As a further optimization of the present invention, the stirring plate is provided with a densely arranged first filter hole, and the movable plate is provided with a densely arranged second filter hole, wherein the diameter of the second filter hole is larger than the diameter of the first filter hole.

[0011] As a further optimization of the present invention, the hollow tube is equipped with a plurality of circumferentially arranged disturbance plates located inside the material discharge cylinder, and both sides of the disturbance plates are connected to conical spikes arranged in an array.

[0012] As a further optimization of the present invention, the outer periphery of the hollow tube is connected to a one-way air outlet located in the inner cylinder, and the bottom of the drying cylinder is equipped with a heating air supply component for conveying hot air into the hollow tube.

[0013] As a further optimization of the present invention, the one-way air outlet component includes an air outlet pipe and a one-way air outlet valve. The outer periphery of the hollow tube is connected with a plurality of air outlet pipes arranged at intervals and located in the inner cylinder along its length direction, and a one-way air outlet valve is installed on the air outlet pipe.

[0014] As a further optimization of the present invention, the heating air component includes a rotary joint and an air supply pipe. The rotary joint is installed at the bottom of the drying cylinder. The bottom end of the hollow tube rotates through the bottom of the drying cylinder and is connected to the rotating air outlet end of the rotary joint. The air inlet end of the rotary joint is connected to the air supply pipe, and the air supply pipe is used to connect to a hot air blower.

[0015] As a further optimization of the present invention, a ventilation pipe communicating with the interior is connected to the outer periphery of the top of the inner cylinder, and a filter screen is connected to one end of the ventilation pipe near the inner cylinder.

[0016] As a further optimization of the present invention, the driving component includes a motor, a driving gear and a driven gear. The driven gear is fixedly mounted on the bottom end of the hollow tube and located between the drying cylinder and the rotary joint. The motor is installed at the bottom of the drying cylinder, and the output end of the motor is connected to the driving gear that meshes with the driven gear.

[0017] As a further optimization of the present invention, the bottom of the drying cylinder is connected to an eccentrically arranged discharge pipe that communicates with the inner cylinder. A valve is installed on the discharge pipe. A pusher plate located below the stirring plate is installed on the pusher plate. When the hollow tube rotates, it can drive the pusher plate to push the material to the discharge pipe position for discharge.

[0018] The above-described technical solution of the present invention has the following beneficial technical effects:

[0019] 1. Hot air enters the air chamber through the air inlet pipe, heating the limestone powder in the feeding cylinder. Then, it flows into the hot air chamber through the air guide pipe, heating the inner cylinder, and finally is discharged through the exhaust pipe, forming a circulation. When limestone powder is fed into the feeding cylinder, the drive unit drives the hollow tube, the agitator, and the V-shaped agitator to rotate synchronously. The agitator stirs the limestone powder and pushes it into the inner cylinder through the feeding port. When the V-shaped agitator rotates, it undergoes elastic deformation when passing through the arc-shaped protrusion, squeezing and breaking up large pieces of limestone powder. This design achieves intermittent feeding, heating during feeding, and squeezing and breaking during stirring, avoiding the agglomeration of limestone powder during drying, improving the heating effect, improving the drying quality, shortening the drying time, and reducing energy consumption.

[0020] 2. The V-shaped agitator of the present invention consists of an agitating plate and a movable plate, forming a V-shaped structure. When the hollow tube rotates, the agitating plate rotates accordingly. The movable plate is hinged to the agitating plate on its side. When it passes the arc-shaped protrusion on the inner wall of the inner cylinder, the elastic sheet between the two undergoes elastic deformation. This process can squeeze and crush the blocky limestone powder. The movable plate is provided with a second filter hole with a larger aperture, and the agitating plate is provided with a first filter hole with a smaller aperture. When the limestone powder is stirred, the second filter hole can cut the limestone powder, and the limestone powder after being squeezed and crushed can be further cut through the first filter hole to make it finer. When the movable plate moves away from the arc-shaped protrusion, the elastic sheet drives it to quickly return to its original position, while shaking off the limestone powder that is blocked in the second filter hole. This design, through the deformable V-shaped structure and the double-layer filter holes with different apertures, realizes the dynamic crushing and cutting of large materials, making the limestone powder finer and more evenly heated during the stirring process, thereby improving the drying quality.

[0021] 3. The main body of the disturbance component of the present invention is a disturbance plate. When the hollow tube drives the disturbance plate to rotate and push the limestone powder to fall at intervals, the kinetic energy of the disturbance plate when it rotates can be used to puncture the lumps in the limestone powder through the cone-shaped head on it, which plays the role of initial treatment of limestone powder. The above design pre-crushes the agglomerated material in the falling stage, reduces the load of subsequent mixing and crushing, and improves the overall crushing efficiency and the uniformity of the material before drying.

[0022] 4. To further improve the drying effect of limestone powder, when the hollow tube drives the V-shaped agitator to stir the limestone powder, hot air can be delivered into the hollow tube through the heating air supply component. The hot air entering the hollow tube can be discharged through the one-way air outlet on it, blowing hot air into the middle of the limestone powder. This not only directly heats the limestone powder in the middle, but also disperses the limestone powder that has agglomerated in the middle. The above design delivers hot air directly to the middle of the material through the hollow tube, which enhances the heat transfer and airflow disturbance in the central area, effectively prevents the material from agglomerating and improves the overall drying uniformity. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a drying device for limestone powder processing proposed in this invention.

[0024] Figure 2 This is a schematic diagram of the bottom structure of a drying device for limestone powder processing proposed in this invention;

[0025] Figure 3 This is an internal cross-sectional view of the drying cylinder and the air duct of the present invention;

[0026] Figure 4 This is an internal cross-sectional view of the drying cylinder, inner cylinder, air duct, and discharge cylinder of the present invention;

[0027] Figure 5 For the present invention Figure 4 Overall front view;

[0028] Figure 6 This is a schematic diagram of the internal structure of the inner cylinder of the present invention;

[0029] Figure 7 This is a schematic diagram of the cooperative structure of the hollow tube, the disturbance component, and the V-shaped agitator in this invention;

[0030] Figure 8 This is a schematic diagram of the structure of the V-shaped agitator of the present invention;

[0031] Figure 9 For the present invention Figure 7 Enlarged view of A in the middle;

[0032] Figure 10 This is a schematic diagram of the ventilation duct of the present invention.

[0033] Reference numerals: 1. Drying cylinder; 101. Inner cylinder; 1011. Arc-shaped protrusion; 102. Exhaust pipe; 103. Discharge pipe; 1031. Valve; 104. Ventilation pipe; 1041. Filter screen; 2. Air duct; 201. Discharge port; 21. Discharge cylinder; 22. Air inlet pipe; 23. Air guide pipe; 3. Hollow pipe; 31. Pusher plate; 4. Driving component; 41. Motor; 42. Drive gear; 43. Driven gear; 5. Disturbing component; 51. Disturbing plate; 52. Conical spike; 6. V-shaped agitator; 61. Agitator plate; 611. First filter hole; 62. Movable plate; 621. Second filter hole; 63. Elastic sheet; 7. One-way air outlet component; 71. Air outlet pipe; 72. One-way air outlet valve; 8. Heating air component; 81. Rotary joint; 82. Air supply pipe. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0035] like Figure 1-10 As shown, the present invention proposes a drying device for limestone powder processing, comprising a drying cylinder 1, an air guide pipe 23, and a driving component 4;

[0036] An inner cylinder 101 is fixed inside the drying cylinder 1, forming a hot air chamber between the two. An air duct 2 is fixed at the top of the drying cylinder 1, and a material discharge cylinder 21 is fixed inside the air duct 2, forming an air duct chamber between the two. An air inlet pipe 22 communicating with the air duct chamber is connected to the outer periphery of the air duct 2. An air guide pipe 23 is connected between the drying cylinder 1 and the air duct 2, and both ends of the air guide pipe 23 are respectively connected to the air duct chamber and the hot air chamber. An exhaust pipe 102 communicating with the hot air chamber is connected to the outer periphery of the drying cylinder 1.

[0037] The bottom of the discharge cylinder 21 is provided with a discharge port 201 that is biased and communicates with the inner cylinder 101. A hollow tube 3 is installed in the inner cylinder 101 and extends into the discharge cylinder 21. A disturbance 5 and a V-shaped agitator 6 are installed on the hollow tube 3. The disturbance 5 is located inside the discharge cylinder 21, and the V-shaped agitator 6 is located inside the inner cylinder 101. A number of circumferentially arranged arc-shaped protrusions 1011 are installed on the inner wall of the inner cylinder 101. The hollow tube 3 is driven by the driving component 4 to drive the disturbance 5 and the V-shaped agitator 6 to rotate synchronously. When the V-shaped agitator 6 passes the arc-shaped protrusions 1011, it elastically deforms and crushes large pieces of material.

[0038] Hot air enters the air passage between the air duct 2 and the material discharge cylinder 21 through the air inlet pipe 22, preheating the material discharge cylinder 21. Subsequently, the hot air enters the hot air passage between the drying cylinder 1 and the inner cylinder 101 through the air guide pipe 23, heating the inner cylinder 101. Finally, it is discharged from the exhaust pipe 102, forming a hot air circulation. After the limestone powder is fed into the material discharge cylinder 21, the drive component 4 drives the hollow tube 3 to rotate, which in turn drives the agitator 5 inside the material discharge cylinder 21 to stir the powder, preventing the powder from clumping before discharge. At the same time, the offset discharge port 201 enables intermittent feeding, preventing the powder from accumulating too thickly in the inner cylinder 101 and causing uneven heating. During the intermittent feeding process, the material discharge cylinder 21 is preheated by hot air. This design achieves initial heating of limestone powder, reducing subsequent drying time. The hollow tube 3 rotates while simultaneously driving the V-shaped agitator 6 to agitate within the inner cylinder 101. When the V-shaped agitator 6 passes the arc-shaped protrusion 1011 on the inner wall of the inner cylinder 101, it undergoes elastic deformation, crushing and extruding large clumps of limestone powder to ensure fine and uniform particles. This design, through a combination of external double preheating, intermittent feeding, dynamic crushing, and continuous stirring, reduces agglomeration at the source, ensuring full contact between the powder and the heating environment. This solves the problems of powder agglomeration and uneven heating in the center during traditional drying, improving drying uniformity and efficiency, shortening drying time, and reducing energy consumption.

[0039] In this embodiment, the V-shaped agitator 6 includes an agitator plate 61, a movable plate 62, and an elastic sheet 63. Multiple agitator plates 61 arranged circumferentially and located in the inner cylinder 101 are installed on the hollow tube 3. The movable plate 62 is hinged to the side of the agitator plate 61, and the agitator plate 61 and the movable plate 62 form a V-shaped structure. An elastic sheet 63 is connected between the agitator plate 61 and the movable plate 62. The length of the movable plate 62 is greater than the length of the agitator plate 61, so as to contact the arc-shaped protrusion 1011 when it passes through it.

[0040] During the rotation of the V-shaped structure composed of the stirring plate 61 and the movable plate 62, when the movable plate 62 comes into contact with the arc-shaped protrusion 1011 on the inner wall of the inner cylinder 101, it undergoes elastic deformation under pressure, and the V-shaped angle becomes smaller, thus crushing large pieces of limestone powder. This dynamic crushing method effectively prevents limestone powder from clumping and improves the uniformity of drying.

[0041] In this embodiment, the stirring plate 61 is provided with densely arranged first filter holes 611, and the movable plate 62 is provided with densely arranged second filter holes 621, and the diameter of the second filter holes 621 is larger than the diameter of the first filter holes 611.

[0042] When the movable plate 62 rotates and agitates with the hollow tube 3, the second filter hole 621 on its surface will cut the powder, initially cutting larger pieces of powder into medium-sized particles. At the same time, it will also act as a screen, allowing medium-sized powder that meets the pore size requirements to pass through the second filter hole 621 and enter between the agitating plate 61 and the movable plate 62. Subsequently, the first filter hole 611 on the agitating plate 61 will perform secondary cutting and screening of the medium-sized powder, further refining it into smaller particles. A small amount of large pieces of powder that do not pass through the filter hole will be crushed under the extrusion of the V-shaped structure and then participate in screening again. This double-layer filter hole design, on the one hand, assists in crushing through the cutting action, making the powder particles finer and more uniform, avoiding uneven heating caused by large particles blocking the flow. On the other hand, the screening function of the filter hole allows powder of different particle sizes to contact the heat source in layers. Small particles of powder can be dried quickly, while large particles of powder are gradually dried after continuous cutting and crushing, ensuring consistent overall drying quality and reducing the accumulation of powder on the plate surface.

[0043] It should be noted that after the movable plate 62 moves away from the arc-shaped protrusion 1011, the elastic sheet 63 drives the movable plate 62 to quickly return to its original position. During this process, the limestone powder blocking the second filter hole 621 on the movable plate 62 is shaken off, ensuring that the second filter hole 621 can continue to function.

[0044] In this embodiment, a plurality of circumferentially arranged disturbance plates 51 are installed on the hollow tube 3 and located inside the material drop cylinder 21. Both sides of the disturbance plates 51 are connected to cone spikes 52 arranged in an array.

[0045] When the hollow tube 3 is driven to rotate by the drive component 4, it drives multiple circumferentially arranged disturbance plates 51 to rotate synchronously in the discharge cylinder 21. The rotational kinetic energy of the disturbance plates 51 will push the powder in the discharge cylinder 21 to move towards the biased discharge port 201, avoiding the accumulation and blockage of powder at the bottom of the discharge cylinder 21, and realizing intermittent feeding. At the same time, the cone-shaped spikes 52 arranged in an array on both sides of the disturbance plate 51 will pierce into the clumps of powder during rotation, using the sharp structure of the spikes to pierce and break up large clumps, performing pre-crushing treatment on the powder before discharge. This pre-crushing design can effectively reduce the amount of large pieces of powder entering the inner cylinder 101, reduce the crushing load of the subsequent V-shaped agitator 6, and avoid problems such as insufficient mixing and uneven heating caused by too many large pieces of powder. At the same time, the pre-crushed powder has better dispersion during the falling process, and can come into contact with the heating environment more quickly after entering the inner cylinder 101, improving the overall drying efficiency.

[0046] In this embodiment, a one-way air outlet 7 located in the inner cylinder 101 is connected to the outer periphery of the hollow tube 3. A heating air supply component 8 is installed at the bottom of the drying cylinder 1 to deliver hot air into the hollow tube 3. Hot air is delivered into the hollow tube 3 through the heating air supply component 8, and the hot air is directionally discharged through the one-way air outlet 7 on the outer periphery of the hollow tube 3, directly blowing towards the powder in the middle of the inner cylinder 101. The one-way design of the one-way air outlet 7 ensures that the hot air is only blown outward, avoiding the powder from entering the hollow tube 3 in reverse and causing blockage. The direct blowing of the internal hot air can directly heat the powder in the middle, making up for the deficiency of insufficient heat transfer to the powder in the middle by external heating, realizing synchronous heating inside and outside and improving drying efficiency. On the other hand, the blowing force of the hot air can effectively disperse the powder aggregated in the middle, prevent clumping, and accelerate the airflow around the powder, taking away the evaporated moisture and further improving the drying effect. This dual heating design inside and outside allows the powder to be heated evenly from the surface to the inside, solving the problem of incomplete drying of the powder in the middle in traditional drying.

[0047] In this embodiment, the one-way air outlet component 7 includes an air outlet pipe 71 and a one-way air outlet valve 72. The outer periphery of the hollow tube 3 is connected with a plurality of air outlet pipes 71 arranged at intervals and located in the inner cylinder 101 along its length direction, and a one-way air outlet valve 72 is installed on the air outlet pipe 71.

[0048] The air outlet pipes 71 are arranged at intervals along the length of the hollow tube 3, which can disperse the hot air in the hollow tube 3 to different height areas of the inner cylinder 101, ensuring that the powder in the upper and lower parts of the inner cylinder 101 can be blown by the internal hot air, avoiding the formation of heating dead zones in local areas. When the heating air supply component 8 delivers hot air into the hollow tube 3, the hot air pressure is greater than the external pressure, and the one-way air outlet valve 72 automatically opens. The hot air is evenly blown onto the powder through the air outlet pipes 71. When the hot air supply stops or the pressure in the hollow tube 3 decreases, the one-way air outlet valve 72 automatically closes, effectively preventing the limestone powder in the inner cylinder 101 from entering the air outlet pipes 71 and the hollow tube 3 in reverse, and avoiding pipe blockage that would affect the normal operation of the equipment.

[0049] In this embodiment, the heating air component 8 includes a rotary joint 81 and an air supply pipe 82. The rotary joint 81 is installed at the bottom of the drying cylinder 1. The bottom end of the hollow tube 3 rotates through the bottom of the drying cylinder 1 and is connected to the rotating air outlet end of the rotary joint 81. The air inlet end of the rotary joint 81 is connected to the air supply pipe 82, and the air supply pipe 82 is used to connect to the hot air blower. The hot air blower delivers hot air to the rotary joint 81 through the air supply pipe 82, and then the hot air enters the hollow tube 3 and is finally discharged through the air outlet pipe 71.

[0050] In this embodiment, a ventilation pipe 104 communicating with the interior is connected to the outer periphery of the top of the inner cylinder 101. A filter screen 1041 is connected to one end of the ventilation pipe 104 near the inner cylinder 101. The ventilation pipe 104 is used to discharge moisture from the inner cylinder 101 and accelerate the drying process, while the filter screen 1041 is used to filter dust in the discharged gas and protect the external environment.

[0051] In practical use, the ventilation duct 104 can be connected to an external heat source collection device, which can capture a small amount of dust and also make use of the exhaust hot air.

[0052] In this embodiment, the driving component 4 includes a motor 41, a driving gear 42, and a driven gear 43. The driven gear 43 is fixedly mounted on the bottom end of the hollow tube 3 and located between the drying cylinder 1 and the rotary joint 81. The motor 41 is installed at the bottom of the drying cylinder 1, and the output end of the motor 41 is connected to the driving gear 42, which meshes with the driven gear 43. During operation, the motor 41 drives the driving gear 42 to rotate the driven gear 43, and the hollow tube 3 connected to the driven gear 43 rotates accordingly. When the hollow tube 3 rotates, it can drive the disturbance component 5 and the V-shaped stirring component 6 on it to rotate synchronously.

[0053] In this embodiment, the bottom of the drying cylinder 1 is connected to an eccentrically arranged discharge pipe 103 that communicates with the inner cylinder 101. A valve 1031 is installed on the discharge pipe 103. A pusher plate 31 located below the stirring plate 61 is installed on the pusher plate 31. When the hollow tube 3 rotates, it can drive the pusher plate 31 to push the material to the discharge pipe 103 for discharge.

[0054] After the limestone powder is dried, the valve 1031 on the discharge pipe 103 can be opened to allow the limestone powder in the inner cylinder 101 to be discharged through the discharge pipe 103. When the hollow pipe 3 rotates, the pusher plate 31 rotates synchronously with it, pushing the dried powder in the inner cylinder 101 toward the discharge pipe 103 so that the powder can be discharged through the discharge pipe 103.

[0055] The embodiments of the present invention have been described above, but the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments described above, all of which are within the protection scope of the embodiments described above.

Claims

1. A drying device for limestone powder processing, characterized in that, It includes a drying cylinder (1), an air duct (23), and a drive unit (4); The drying cylinder (1) has an inner cylinder (101) fixed inside, and a hot air cavity is formed between the two. The top of the drying cylinder (1) is fixed with an air duct (2), and a material discharge cylinder (21) is fixed inside the air duct (2), forming an air cavity between the two. The outer periphery of the air duct (2) is connected with an air inlet pipe (22) that communicates with the air cavity. The air guide pipe (23) is connected between the drying cylinder (1) and the air duct (2), and the two ends of the air guide pipe (23) are respectively connected to the air cavity and the hot air cavity. The outer periphery of the drying cylinder (1) is connected with an exhaust pipe (102) that communicates with the hot air cavity. The bottom of the discharge cylinder (21) is provided with a discharge port (201) that is biased and communicates with the inner cylinder (101). A hollow tube (3) is installed in the inner cylinder (101) and extends into the discharge cylinder (21). A disturbance component (5) and a V-shaped agitator (6) are installed on the hollow tube (3). The disturbance component (5) is located in the discharge cylinder (21), and the V-shaped agitator (6) is located in the inner cylinder (101). A number of circumferentially arranged arc-shaped protrusions (1011) are installed on the inner wall of the inner cylinder (101). The hollow tube (3) is driven by the driving component (4) to drive the disturbance component (5) and the V-shaped agitator (6) to rotate synchronously. When the V-shaped agitator (6) passes the arc-shaped protrusion (1011), it elastically deforms and crushes large pieces of material.

2. The drying device for limestone powder processing according to claim 1, characterized in that, The V-shaped agitator (6) includes an agitator plate (61), a movable plate (62), and an elastic sheet (63). Multiple agitator plates (61) are installed on the hollow tube (3) and are located in the inner cylinder (101). The movable plate (62) is hinged to the side of the agitator plate (61), and the agitator plate (61) and the movable plate (62) form a V-shaped structure. An elastic sheet (63) is connected between the agitator plate (61) and the movable plate (62). The length of the movable plate (62) is greater than the length of the agitator plate (61) and is used to contact the arc-shaped protrusion (1011) when passing through it.

3. The drying device for limestone powder processing according to claim 2, characterized in that, The stirring plate (61) has a densely arranged first filter hole (611), and the movable plate (62) has a densely arranged second filter hole (621), and the diameter of the second filter hole (621) is larger than the diameter of the first filter hole (611).

4. The drying apparatus for limestone powder processing according to claim 1, characterized in that, The hollow tube (3) is equipped with a plurality of circumferentially arranged disturbance plates (51) located in the material drop cylinder (21), and both sides of the disturbance plates (51) are connected to cone spikes (52) arranged in an array.

5. A drying apparatus for limestone powder processing according to claim 1, characterized in that, The hollow tube (3) is connected to a one-way air outlet (7) located in the inner cylinder (101) on its outer periphery, and a heating air supply component (8) for supplying hot air into the hollow tube (3) is installed at the bottom of the drying cylinder (1).

6. A drying apparatus for limestone powder processing according to claim 5, characterized in that, The one-way air outlet component (7) includes an air outlet pipe (71) and a one-way air outlet valve (72). The outer periphery of the hollow tube (3) is connected with a plurality of air outlet pipes (71) arranged at intervals and located in the inner cylinder (101) along its length direction, and a one-way air outlet valve (72) is installed on the air outlet pipe (71).

7. A drying apparatus for limestone powder processing according to claim 5, characterized in that, The heating air component (8) includes a rotary joint (81) and an air supply pipe (82). The rotary joint (81) is installed at the bottom of the drying cylinder (1). The bottom end of the hollow tube (3) rotates through the bottom of the drying cylinder (1) and is connected to the rotating air outlet end of the rotary joint (81). The air inlet end of the rotary joint (81) is connected to the air supply pipe (82), and the air supply pipe (82) is used to connect to the hot air blower.

8. A drying apparatus for limestone powder processing according to claim 5, characterized in that, The top outer periphery of the inner cylinder (101) is connected to a ventilation pipe (104) that communicates with the interior. A filter screen (1041) is connected to one end of the ventilation pipe (104) near the inner cylinder (101).

9. A drying apparatus for limestone powder processing according to claim 7, characterized in that, The driving component (4) includes a motor (41), a driving gear (42) and a driven gear (43). The driven gear (43) is fixedly mounted on the bottom end of the hollow tube (3) and located between the drying cylinder (1) and the rotary joint (81). The motor (41) is installed at the bottom of the drying cylinder (1). The output end of the motor (41) is connected to the driving gear (42) that meshes with the driven gear (43).

10. A drying apparatus for limestone powder processing according to claim 2, characterized in that, The bottom of the drying cylinder (1) is connected to an eccentrically positioned discharge pipe (103) that communicates with the inner cylinder (101). A valve (1031) is installed on the discharge pipe (103). A pusher plate (31) located below the stirring plate (61) is installed on the pusher plate (31). When the hollow tube (3) rotates, it can drive the pusher plate (31) to push the material to the discharge pipe (103) for discharge.

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