Solution drying device

Abstract

The solution drying device comprises an atomization unit and an evaporation unit, the atomization unit comprises a liquid storage bin and an atomization disc, a downward opening is formed in the bottom of the liquid storage bin, the atomization disc is connected to the opening in a movable sealing mode in the mode that the atomization disc can pivot around the axial direction of the opening so as to seal the opening, and the evaporation unit is connected with the liquid storage bin. A containing cavity communicated with the interior of the liquid storage bin is formed in the atomizing disc, a plurality of liquid outlet holes communicated with the containing cavity are evenly distributed in the side wall of the atomizing disc in the circumferential direction, the liquid outlet holes are runway-shaped flat holes, and the long diameters of the flat holes are arranged in the direction parallel to the axial direction; the evaporation unit comprises an evaporation bin, the side wall of the liquid storage bin is arranged on the top wall of the evaporation bin in a penetrating mode, and the atomizing disc is located in the evaporation bin. The atomizing disc solves the problems that in the prior art, liquid outlet holes of the atomizing disc are round holes, and the diameter of the round holes is small, so that atomizing uniformity is poor, and efficiency is low.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal physical engineering, in particular to a drying device for a solution. Background Art

[0002] In existing industrial drying devices, as a key component, the performance of the atomizer directly affects the efficiency of the entire drying process and the quality of the product. In the traditional atomizer design, the liquid outlet holes on the atomizing disc usually adopt a round hole structure with a diameter of Φ10mm. However, in the actual application process, this design has significant defects and deficiencies.

[0003] Firstly, due to the relatively small diameter of the round holes, material blockage is likely to occur during the material atomization process. When the material passes through the liquid outlet holes, it is easily blocked due to the too small aperture, which in turn affects the atomization uniformity and efficiency. This not only increases the maintenance difficulty of the equipment but also may have an adverse impact on the product quality. If the diameter of the round holes is set larger, it will lead to insufficient pressure inside the atomizing disc, and the liquid material cannot reach an effective spraying distance, thus affecting the evaporation effect in the evaporation chamber.

[0004] When the diameter of the round holes is relatively small, difficult cleaning is also a major drawback of the traditional design. Due to the small aperture and possibly large number of liquid outlet holes, it is difficult to thoroughly remove the residual material in the holes during cleaning. Over time, it is easy for the aperture to further shrink or even become completely blocked. This not only increases the difficulty and cost of the cleaning work but also may pose a threat to the normal operation of the equipment.

[0005] In summary, the liquid outlet hole design in the traditional atomizer has problems such as material blockage and difficult cleaning, which severely restricts the performance and efficiency of the drying device. Therefore, it is necessary to improve and optimize the existing atomizer structure to solve the above problems and improve the overall performance of the equipment. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a drying device for a solution to solve the problems in the prior art that the liquid outlet holes of the atomizing disc are set as round holes with a relatively small diameter, resulting in poor atomization uniformity and low efficiency.

[0007] To achieve the above object of the utility model, an embodiment of the utility model provides a drying device for a solution, which includes:

[0008] An atomizing unit, the atomizing unit includes a liquid storage chamber and an atomizing disk. The bottom of the liquid storage chamber has a downward opening. The atomizing disk is movably and sealingly connected to the opening in a manner that can pivot around the axis of the opening to seal the opening. An accommodation cavity communicating with the inside of the liquid storage chamber is formed inside the atomizing disk. A plurality of liquid outlet holes communicating with the accommodation cavity are uniformly distributed along the circumferential direction of the side wall of the atomizing disk. The liquid outlet holes are arranged as oblong flat holes, and the major axis of the flat hole is arranged in a direction parallel to the axis.

[0009] An evaporation unit, the evaporation unit includes an evaporation chamber. The side wall of the liquid storage chamber penetrates through the top wall of the evaporation chamber, and the atomizing disk is located inside the evaporation chamber.

[0010] As a further improvement of an embodiment of the present invention, wherein, the end of the opening is circular, the atomizing disk is arranged as a disk shape, the flat hole is formed by extending along the radial direction of the atomizing disk, and the cross-section of the flat hole perpendicular to the radial direction of the atomizing disk includes a rectangle in the middle and two semi-circles on the upper and lower sides of the rectangle. The lengths of the two sides of the rectangle parallel to the axis are 10 mm, and the lengths of the other two sides perpendicular to the aforementioned two sides are 5 mm.

[0011] As a further improvement of an embodiment of the present invention, wherein, the liquid storage chamber includes an inverted conical chamber side wall and a support flange provided at the top end of the chamber side wall. The atomizing unit further includes a driving device. The driving device is arranged at the upper end of the support flange. The pivoting part of the driving device penetrates through the support flange and is connected to the atomizing disk to drive the atomizing disk to pivot around its central axis.

[0012] As a further improvement of an embodiment of the present invention, wherein, the lower end of the inverted conical chamber side wall converges and encloses to form the opening.

[0013] As a further improvement of an embodiment of the present invention, wherein, it further includes a dust removal unit. The evaporation unit includes a screen and a connecting pipe provided at the bottom of the evaporation chamber. The other end of the connecting pipe is connected to the dust removal unit. A communicating flow channel communicating the inside of the evaporation chamber and the inside of the dust removal unit is provided inside the connecting pipe. The screen is arranged in the communicating flow channel and is used for filtering the materials passing through the communicating flow channel.

[0014] As a further improvement of an embodiment of the present invention, wherein, the screen includes a screen body and a plurality of uniformly arrayed screen holes on the screen body. The screen holes penetrate through the screen body in the vertical direction.

[0015] As a further improvement of an embodiment of the present invention, wherein, the cross-section of the screen hole perpendicular to the vertical direction is a square, and the side length of the square is 10 mm.

[0016] As a further improvement of an embodiment of the present utility model, wherein the side wall of the evaporation chamber includes a cylindrical side wall located at the upper part and an inverted conical side wall located at the lower part. The upper end of the inverted conical side wall is butt-connected to the lower end of the cylindrical side wall. The lower end of the inverted conical side wall converges and encloses to form a downward discharge port. One end of the connecting pipe away from the dust removal unit is butt-connected and communicated with the discharge port.

[0017] As a further improvement of an embodiment of the present utility model, wherein the dust removal unit includes a receiving bin, an exhaust port and a conveying component. The connecting pipe connects the receiving bin and the evaporation chamber. The communicating flow channel has a discharge port facing the inside of the receiving bin. The conveying component is arranged below the discharge port to receive the materials discharged from the discharge port. The exhaust port is arranged at the upper part of the receiving bin and communicates with the inside of the receiving bin.

[0018] As a further improvement of an embodiment of the present utility model, wherein it further includes a combustion unit. The combustion unit includes a combustion chamber and a gas transmission pipe communicating the inside of the combustion chamber with the inside of the evaporation chamber.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] The accommodation cavity inside the atomizing disc is directly connected to the inside of the liquid storage bin, ensuring the smooth flow of the solution. The liquid outlet holes uniformly distributed on the side wall of the atomizing disc adopt a unique runway-shaped flat hole design. In this way, the major axis of the flat hole is arranged along the axial direction parallel to the opening, so that the solution can form a thinner and more uniform liquid film when passing through the liquid outlet holes, greatly promoting the uniformity of atomization and improving the atomization efficiency. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of a solution drying device provided by an embodiment of the present utility model;

[0022] Figure 2 is Figure 1 the schematic structural diagram of the atomizing unit in

[0023] Figure 3 is Figure 2 the enlarged view of M in

[0024] Figure 4 is Figure 1 the schematic cross-sectional view in the A-A direction in

[0025] The above description of the drawings includes the following reference numerals:

[0026] 1. Atomizing unit;

[0027] 11. Liquid storage bin;

[0028] 111. Opening;

[0029] 112. Silo side wall;

[0030] 113. Support flange;

[0031] 12. Atomization disc;

[0032] 121. Liquid outlet hole;

[0033] 13. Driving device;

[0034] 131. Pivoting part;

[0035] 2. Evaporation unit;

[0036] 21. Evaporation silo;

[0037] 211. Cylindrical side wall;

[0038] 212. Inverted conical side wall;

[0039] 213. Discharge port;

[0040] 22. Mesh screen;

[0041] 221. Mesh screen body;

[0042] 222. Sieve holes;

[0043] 23. Connecting pipe;

[0044] 231. Connecting flow channel;

[0045] 2311. Discharge port;

[0046] 3. Dust removal unit;

[0047] 31. Material receiving silo;

[0048] 32. Exhaust port;

[0049] 33. Conveying component;

[0050] 34. Material receiving port;

[0051] 4. Combustion unit;

[0052] 41. Combustion chamber;

[0053] 42. Gas transmission pipeline. Detailed implementation manners

[0054] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0055] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0056] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0057] In order to solve the problem that the liquid outlet hole of the atomizing disk is set as a round hole in the prior art, and the round hole has a small diameter, resulting in poor uniformity and low efficiency of atomization, the utility model provides a solution drying device.

[0058] like Figure 1-4 As shown, a solution drying device provided by an embodiment of the utility model specifically includes an atomization unit 1 and an evaporation unit 2.

[0059] Specifically, the atomization unit 1 includes a liquid storage bin 11 and an atomization disk 12. The bottom of the liquid storage bin 11 has a downward opening 111. The atomization disk 12 is dynamically sealed and connected to the opening 111 in a manner that it can pivot around the axial direction of the opening 111 to close the opening 111. A accommodating cavity connected to the liquid storage bin 11 is formed inside the atomization disk 12. The side wall of the atomization disk 12 has multiple liquid outlet holes 121 connected to the accommodating cavity evenly distributed along the circumferential direction. The liquid outlet hole 121 is set as a runway-shaped flat hole and the major diameter of the flat hole is set along the axial direction parallel to the opening.

[0060] Furthermore, the evaporation unit 2 includes an evaporation bin 21 , a side wall of the liquid storage bin 11 is penetrated through a top wall of the evaporation bin 21 , and the atomization disk 12 is located inside the evaporation bin 21 .

[0061] The drying device is ingeniously designed to achieve efficient and uniform atomization and evaporation processes, thereby improving the efficiency and product quality of, for example, the evaporation of titanium dioxide solution.

[0062] The atomization unit 1 is the core component of the device. Its liquid storage tank 11 not only undertakes the task of storing the solution, but also realizes seamless connection with the atomization disk 12 through the carefully designed opening 111 at the bottom. The atomization disk 12 is dynamically sealed with the opening 111 in a manner that can be pivoted around the axial direction of the opening 111, which not only ensures the sealing of the solution in the liquid storage tank 11, but also makes it easy to adjust the opening and closing degree of the liquid outlet 121 by rotating the atomization disk 12, thereby controlling the atomization rate of the solution.

[0063] The accommodation cavity inside the atomization disk 12 is directly connected to the inside of the liquid storage chamber 11, ensuring the smooth flow of the solution. The liquid outlet holes 121 evenly distributed on its side wall adopt a unique runway-shaped flat hole design. The innovative point is that the major axis of the flat hole is arranged along the axial direction parallel to the opening 111, enabling the solution to form a thinner and more uniform liquid film when passing through the liquid outlet holes 121, greatly promoting the atomization effect and laying a good foundation for the subsequent evaporation process.

[0064] The evaporation chamber 21 of the evaporation unit 2 serves as the "stage" for the atomized solution. Its design fully considers the optimization of heat transfer and air flow distribution. The side wall of the liquid storage chamber 11 directly penetrates the top wall of the evaporation chamber 21, which not only simplifies the structure but also effectively shortens the distance from the atomized droplets to the evaporation interface, reducing heat loss. The atomization disk 12 is placed inside the evaporation chamber 21, and the centrifugal force generated by its rotation further promotes the dispersion of the droplets, interacting with the heat sources evenly distributed in the evaporation chamber to achieve a fast and uniform evaporation effect.

[0065] Furthermore, the end of the opening 111 is designed to be circular, which not only facilitates the tight docking with the disk-shaped atomization disk 12 but also helps to optimize the flow path of the solution and reduce the resistance during the atomization process. The atomization disk 12 adopts a disk-shaped design, which is not only structurally compact but also conducive to the uniform distribution of the liquid outlet holes 121, ensuring the uniformity of atomization. The flat holes extend along the radial direction of the atomization disk 12. This unique design enables the solution to form a thinner and wider liquid film when passing through the liquid outlet holes 121, thereby further enhancing the atomization effect.

[0066] Reference Figure 3 As shown, the cross-sectional design of the flat hole perpendicular to the radial direction of the atomization disk 12 is also ingenious. It includes a rectangle in the middle and two semi-circles on the upper and lower sides of the rectangle. This design not only enhances the structural strength of the liquid outlet holes 121 but also helps to optimize the outflow pattern of the solution, making the atomized droplets more uniform and delicate. The lengths of the two sides of the rectangle parallel to the axial direction are set to be L1 = 10 mm. This size not only ensures sufficient solution flow but also avoids the formation of overly large droplets. The lengths of the other two sides perpendicular to the aforementioned two sides are L2, and the length of L2 is set to be 5 mm. This design ensures the thinness of the liquid film, creating favorable conditions for the subsequent evaporation process.

[0067] Furthermore, the design of the liquid storage bin 11 fully considers practicability and efficiency. It includes an inverted conical bin sidewall 112. This design not only helps increase the capacity of the liquid storage bin but also enables the solution to flow naturally to the bottom of the bin under the action of gravity, improving the utilization rate of the solution. The support flange 113 provided at the top of the bin sidewall 112 can be connected to the bin sidewall 112 to form a space for storing the solution. In this embodiment, an infusion tube 114 is usually passed through the support flange 113, and the solution can be filled into the storage bin through the infusion tube 114.

[0068] The atomization unit 1 further includes a driving device 13, and the support flange 113 can also provide an installation base for the driving device 13.

[0069] Furthermore, as the core component of the atomization unit, the driving device 13 is cleverly arranged at the upper end of the support flange 113. Its pivot part 131 is precisely passed through the support flange and is closely connected to the atomization disk 12. This design enables the driving device to efficiently transmit power and drive the atomization disk 12 to perform a stable pivoting motion around its central axis. Driven by the driving device, the atomization disk 12 rotates at a uniform speed, which not only ensures the uniform distribution of the solution but also greatly improves the atomization efficiency, making the atomized droplets finer and more uniform. At the same time, this structural design also facilitates the maintenance and replacement of components, providing a strong guarantee for the long-term stable operation of the atomization unit.

[0070] Furthermore, the lower end of the inverted conical bin sidewall 112 is carefully designed to gradually converge and enclose to form the opening 111. This structure not only makes the liquid storage bin 11 form a natural convergence point at the bottom, which is conducive to the concentrated discharge of the solution, but also ensures a tight connection with the atomization disk 12, preventing the leakage of the solution. At the same time, the conical sidewall also helps to enhance the structural strength of the liquid storage bin.

[0071] Then refer to Figure 1 the best display, the drying device not only includes the core evaporation unit 2 but also cleverly integrates the dust removal unit 3 to achieve comprehensive purification treatment during the material drying process.

[0072] Specifically, the evaporation unit 2 further includes a mesh sieve 22 and carefully arranged connecting pipes 23. Among them, one end of the connecting pipe 23 is firmly arranged at the bottom of the evaporation chamber 21, and the other end is cleverly connected to the dust removal unit 3.

[0073] The interior of the connecting pipe 23 is designed with a connecting flow channel 231 that connects the interior of the evaporation chamber 21 and the interior of the dust removal unit 3. This ingenious design ensures that after the material completes the preliminary evaporation treatment in the evaporation chamber 21, it can smoothly enter the dust removal unit 3 through the connecting flow channel 231 for further dust removal and purification. The mesh screen 22, as the core component of filtration, is cleverly arranged in the connecting flow channel 231. Its main function is to filter the material passing through the connecting flow channel 231, effectively blocking impurities and particulate matter in the material to prevent them from entering the dust removal unit 3, thereby ensuring the operation efficiency and purification effect of the dust removal unit 3. The mesh screen 22 can be arranged at the upper, middle or lower position within the connecting flow channel 231, and the present utility model does not limit this.

[0074] Through the above design, not only the overall processing efficiency of the drying device is improved, but also the service life of the equipment is greatly extended, and the maintenance cost caused by impurity accumulation is reduced. At the same time, the detachable and easy-to-clean design of the mesh screen 22 also makes the daily maintenance of the equipment more convenient, bringing a more efficient and worry-free use experience to users.

[0075] Furthermore, referring to Figure 4 As shown, the mesh screen 22 includes a mesh screen body 221 and a plurality of carefully arranged screen holes 222. These screen holes 222 are evenly arrayed on the mesh screen body 221, which not only ensures the uniformity of the filtration effect but also maximizes the filtration efficiency. The screen holes 222 penetrate the mesh screen body 221 in the vertical direction. This unique design enables the material to be evenly screened from all directions when passing through the screen holes, effectively blocking impurities and particulate matter.

[0076] At the same time, the mesh screen body 221 is made of high-strength material, ensuring its stability and durability during long-term use, and further enhancing the operation reliability and service life of the entire drying device.

[0077] Still referring to Figure 4 As shown, the cross-section of the screen hole 222 perpendicular to the vertical direction is carefully designed to be square. This design not only ensures the maximization of the area of the screen hole, improving the filtration efficiency, but also facilitates processing and manufacturing. The side length L3 of the square is set to 10 mm. This size not only ensures the blocking effect of the screen hole on impurities but also avoids the problem of blockage caused by too small screen holes.

[0078] Furthermore, the sidewall design of the evaporation bin 21 is carefully considered. The upper part adopts a cylindrical sidewall 211, and the lower part is designed as an inverted conical sidewall 212. The two are tightly combined through precise butt - joint connection technology, forming a stable and efficient evaporation bin structure. The lower end of the inverted conical sidewall 212 is cleverly converged and enclosed to form a downward discharge port 213. This design not only optimizes the material flow path but also enhances the overall structural strength of the bin body. One end of the connecting pipe 23 far from the dust removal unit 3 is tightly connected to the discharge port 213 through precise butt - joint technology, ensuring that the material can smoothly and unobstructedly enter the next processing link after being processed in the evaporation bin 21, thereby improving the operating efficiency and processing capacity of the entire drying device.

[0079] Furthermore, the core components of the dust removal unit 3 include a receiving bin 31, an air outlet 32, and a conveying component 33. These components work together to achieve efficient dust removal. The receiving bin 31 is tightly connected to the evaporation bin 21 through the connecting pipe 23, forming a seamless material transmission channel to ensure that the material can smoothly enter the receiving bin 31 from the evaporation bin 21. The connecting flow channel 231 has a discharge port 2311 for discharging materials into the receiving bin 31. The discharge port 2311 is cleverly designed to face the inside of the receiving bin 31. This design enables the material to be accurately discharged into the receiving bin 31, avoiding material waste and scattering.

[0080] The conveying component 33 is carefully arranged below the discharge port 2311, and its position is just right to be able to receive and convey the materials discharged from the discharge port 2311 at any time, ensuring the continuous operation of the dust removal unit. In the present utility model, the conveying component 33 is usually set as a screw conveyor or a conveyor belt.

[0081] Furthermore, a material receiving port 34 is usually provided on the bottom wall of the receiving bin 31, and the materials conveyed by the conveying component 33 can be collected through the material receiving port 34.

[0082] In addition, the air outlet 32 is cleverly arranged at the upper part of the receiving bin 31 and is connected to the inside of the bin. This design enables the air and fine particles inside the bin to be discharged in a timely manner, thereby ensuring the cleanliness of the materials located at the lower part of the receiving bin 31; at the same time, it can also effectively keep the inside of the receiving bin 31 clean and orderly, improving the overall performance and service life of the dust removal unit.

[0083] Furthermore, the drying device further includes a combustion unit 4. This unit mainly consists of a combustion chamber 41 and a gas transmission pipeline 42 that connects the inside of the combustion chamber 41 to the inside of the evaporation chamber 21. The combustion chamber 41, as the core for heat generation, is carefully designed to support an efficient and stable combustion process, thus ensuring sufficient heat generation. The gas transmission pipeline 42 plays an important role in safely and effectively transporting the hot gas generated in the combustion chamber 41 to the evaporation chamber 21. Through this design, the combustion unit 4 not only provides the necessary heat energy for the drying device but also optimizes the utilization and distribution of heat energy, further enhancing the overall performance and efficiency of the drying device.

[0084] In summary, the embodiments of the present utility model achieve the following technical effects:

[0085] The accommodation cavity inside the atomization disk 12 is directly connected to the inside of the liquid storage tank 11, ensuring the smooth flow of the solution. The liquid outlet holes 121 uniformly distributed on the side wall of the atomization disk 12 adopt a unique runway-shaped flat hole design. With this setting, the major axis of the flat hole is arranged along the axial direction parallel to the opening 111, enabling the solution to form a thinner and more uniform liquid film when passing through the liquid outlet holes, greatly promoting the uniformity of atomization and improving the atomization efficiency.

[0086] Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0087] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0088] It should be noted that the terms "first", "second", etc. in the description, claims, and drawings of the present application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order different from those illustrated or described herein.

[0089] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A solution drying device, characterized in that: include: An atomization unit, the atomization unit comprising a liquid storage bin and an atomization disk, the bottom of the liquid storage bin having a downward opening, the atomization disk being dynamically sealed and connected to the opening in a manner that can pivot around the axial direction of the opening to seal the opening, a receiving cavity communicating with the interior of the liquid storage bin formed inside the atomization disk, a plurality of liquid outlet holes communicating with the receiving cavity uniformly distributed along the circumferential direction on the side wall of the atomization disk, the liquid outlet holes being arranged as runway-shaped flat holes, and the major diameter of the flat holes being arranged in a direction parallel to the axial direction; The evaporation unit comprises an evaporation bin, the side wall of the liquid storage bin is penetrated on the top wall of the evaporation bin, and the atomizing disk is located inside the evaporation bin.

2. The drying device according to claim 1, characterized in that: The end of the opening is circular, the atomizing disk is set to be disc-shaped, and the flat hole is formed by extending radially along the atomizing disk. The cross-section of the flat hole perpendicular to the radial direction of the atomizing disk includes a rectangle located in the middle and two semicircles located on the upper and lower sides of the rectangle. The lengths of the two sides of the rectangle parallel to the axial direction are 10 mm, and the lengths of the other two sides perpendicular to the aforementioned two sides are 5 mm.

3. The drying device according to claim 1, characterized in that: The liquid storage bin includes an inverted conical bin side wall and a supporting flange arranged at the top of the bin side wall. The atomization unit also includes a driving device, which is arranged at the upper end of the supporting flange. The pivot portion of the driving device passes through the supporting flange and is connected to the atomization disk to drive the atomization disk to pivot around its central axis.

4. The drying device according to claim 3, characterized in that: The lower ends of the inverted conical side walls of the bin are gathered and enclosed to form the opening.

5. The drying device according to claim 1, characterized in that: It also includes a dust removal unit, the evaporation unit includes a mesh screen and a connecting pipe arranged at the bottom of the evaporation bin, the other end of the connecting pipe is connected to the dust removal unit, the connecting pipe has a connecting flow channel connecting the interior of the evaporation bin and the interior of the dust removal unit, the mesh screen is arranged in the connecting flow channel and is used to filter the material passing through the connecting flow channel.

6. The drying device according to claim 5, characterized in that: The mesh screen comprises a mesh screen body and a plurality of mesh holes evenly distributed in an array on the mesh screen body, wherein the mesh holes penetrate the mesh screen body in a vertical direction.

7. The drying device according to claim 6, characterized in that: The cross section of the sieve hole perpendicular to the vertical direction is a square, and the side length of the square is 10 mm.

8. The drying device according to claim 5, characterized in that: The side wall of the evaporation bin includes a cylindrical side wall at the top and an inverted conical side wall at the bottom, the upper end of the inverted conical side wall is butt-jointed with the lower end of the cylindrical side wall, the lower end of the inverted conical side wall is gathered and enclosed to form a downward discharge port, and the end of the connecting pipe away from the dust removal unit is butt-jointed with the discharge port.

9. The drying device according to claim 5, characterized in that: The dust removal unit includes a material receiving bin, an exhaust port and a conveying component. The connecting pipe connects the material receiving bin and the evaporation bin. The connecting flow channel has a discharge port facing the interior of the material receiving bin. The conveying component is arranged below the discharge port to receive the material discharged from the discharge port. The exhaust port is arranged at the upper part of the material receiving bin and is connected to the interior of the material receiving bin.

10. The drying device according to claim 1, characterized in that: It also includes a combustion unit, which includes a combustion chamber and a gas pipeline connecting the interior of the combustion chamber with the interior of the evaporation chamber.

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