Boric acid drying equipment

Abstract

The invention relates to the technical field of boric acid processing, and discloses boric acid drying equipment which comprises a base, a first drying assembly and a second drying assembly. The first drying assembly comprises a first drying pipe and a first shell, a first cavity is formed between the first shell and the outer wall of the first drying pipe, a plurality of first air inlets inclining upwards are formed in the lower side of the first drying pipe in the circumferential direction, the first air inlets communicate with the first cavity, and a first air inlet pipe communicating with the first cavity is arranged on the first shell; the second drying assembly comprises a second drying pipe, a heating assembly and a stirring air-drying assembly, the top of the second drying pipe communicates with the bottom of the first drying pipe, and the heating assembly is used for heating the interior of the second drying pipe; the stirring and air-drying assembly is used for stirring and air-drying the materials. Through cooperation of the first drying assembly, the second drying assembly and the material buffering assembly, multi-stage uniform drying can be carried out on materials, and through the design of the second air inlet and the Teflon coating, the amount of the materials attached to the wall face can be reduced.

Description

Technical Field

[0001] This invention relates to the field of boric acid processing technology, and more specifically, to a boric acid drying apparatus. Background Technology

[0002] Boric acid is an important inorganic chemical raw material, widely used in glass, ceramics, metallurgy, pharmaceuticals, cosmetics, and flame retardants. In the production process of boric acid, the product obtained through chemical reactions or extraction from natural borax ore is usually wet-based boric acid (filter cake or slurry) containing a large amount of free water. It must undergo a drying process to remove moisture in order to obtain stable powdered or crystalline boric acid products that meet industrial standards.

[0003] In related technologies, the equipment currently used for boric acid drying in industrial production is mostly general-purpose drying equipment, such as: Box dryers or tray dryers: These types of equipment have a simple structure and low investment cost, and are often used for small-batch or intermittent production. However, the static accumulation of materials in these equipment leads to long drying times, the bottom layer of material is prone to overheating and deterioration, while the upper layer of material may not be dried thoroughly, resulting in poor product quality uniformity.

[0004] Rotary drum dryers can achieve continuous operation and have a large processing capacity. However, when drying boric acid, the material tends to adhere and form scales on the inner wall of the drum, which not only reduces heat transfer efficiency but also requires frequent shutdowns for cleaning, affecting the stability of continuous production. Therefore, we propose a boric acid drying device. Summary of the Invention

[0005] This invention provides a boric acid drying device that solves the technical problems in related technologies, such as long drying time due to static accumulation of materials, easy overheating and deterioration of bottom materials, and incomplete drying of top materials, poor product quality uniformity, and easy adhesion of materials to the inner wall of the drum.

[0006] This invention provides a boric acid drying device, including a base; a first drying assembly, which includes a drying tube and a housing, the housing being concentrically disposed on the outer wall of the drying tube and forming a cavity therebetween; a plurality of upwardly inclined air inlets are provided on the lower circumferential side of the drying tube, the air inlets communicating with the cavity; and an air inlet pipe communicating with the cavity is disposed on the housing; a second drying assembly, disposed on the base, includes a second drying tube, a heating assembly, and a stirring and drying assembly, the second drying tube being concentrically disposed with the drying tube, and the top of the second drying tube being aligned with the drying tube. The bottom of drying tube one is connected, and the heating component is set on the outer wall of drying tube two for heating the inside of drying tube two. A discharge port is set on the lower side of drying tube two. The stirring and air drying component includes a blower shaft, multiple blade groups and a power component. The blower shaft is coaxially set inside drying tube two, and a flow channel is opened in the blower shaft along its axial direction. Multiple blade groups are spaced apart along the axial direction of the blower shaft. Each blade group includes multiple blade bodies, and multiple air outlets communicating with the flow channels are opened on the blade bodies. The power component is set at the bottom of drying tube two for driving the blower shaft to rotate.

[0007] As a further improvement of the present invention, the boric acid drying equipment further includes a butterfly valve, the top and bottom of which are fixedly connected to the bottom of the first drying tube and the top of the second drying tube, respectively. The butterfly valve is used to control the connection between the first drying tube and the second drying tube.

[0008] As a further improvement of the present invention, the drying tube first includes an upper section and a lower section; the first drying assembly further includes a dust recovery assembly, which includes a housing second and an annular filter plate first. The filter plate first is concentrically arranged with the drying tube, and the upper and lower sides of the filter plate first are respectively attached to the bottom of the upper section and the top of the lower section. The housing second is disposed on the outside of the filter plate first and forms a cavity second between the housing second and the filter plate first. An exhaust pipe communicating with the cavity second is provided on the housing second. The housing second is fixedly connected to both the upper section and the lower section.

[0009] As a further improvement of the present invention, the upper section has a plurality of downwardly inclined air inlets II in its circumference, and a housing III is concentrically arranged on the outer wall of the upper section, forming a cavity III between the housing III and the outer wall of the upper section, and an air inlet pipe II communicating with the cavity III is provided on the housing III.

[0010] As a further improvement of the present invention, the heating assembly includes a mounting shell and a plurality of heating plates. The mounting shell is concentrically wrapped around the outer wall of the second drying tube and forms a mounting cavity between the mounting shell and the outer wall of the second drying tube. The plurality of heating plates are evenly distributed in the mounting cavity.

[0011] As a further improvement of the present invention, the second drying assembly further includes a discharge plate, which is disposed inside the second drying tube. The side of the discharge plate near the discharge port is flush with the bottom of the discharge port, and the side of the discharge plate away from the discharge port is higher than the discharge port. The air supply shaft is slidably connected to the discharge plate in the vertical direction.

[0012] As a further improvement of the present invention, the power assembly includes an installation pipe, a motor, a first gear, a second gear, and a support plate. The installation pipe is concentrically arranged with the second drying pipe, and the top of the installation pipe is fixedly connected to the bottom of the second drying pipe. The support plate is concentrically arranged inside the installation pipe, and the air supply shaft is rotatably connected to the support plate. The motor is fixedly connected inside the installation pipe. The first gear and the second gear are respectively fixedly connected to the output end of the motor and the air supply shaft, and the first gear and the second gear mesh with each other.

[0013] As a further improvement of the present invention, the second drying assembly further includes a shaped frame and an air supply pipe. The shaped frame is disposed inside the mounting pipe with its opening facing downward. One end of the air supply pipe passes through the top of the shaped frame and communicates with the bottom of the air supply shaft, while the other end extends out to the outside of the mounting pipe and communicates with an external air source.

[0014] As a further improvement of the present invention, the blade bodies at different heights are staggered in the axial direction of the air supply shaft; and the blade bodies are provided with an angle between them and the horizontal plane.

[0015] As a further improvement of the present invention, the boric acid drying equipment also includes a material buffer assembly, which includes a discharge pipe, a buffer pipe, a housing, a filter plate, and a cover plate. The buffer pipe is mounted on the base, and both ends of the discharge pipe are connected to the discharge port and the interior of the buffer pipe, respectively. The housing is concentrically wrapped around the outer wall of the buffer pipe, forming a cavity. The buffer pipe has multiple air inlets circumferentially connected to the cavity. The housing is provided with an air inlet pipe connected to the cavity. The filter plate is concentrically mounted on the upper side of the buffer pipe. The cover plate is used to seal the top of the buffer pipe, and a through hole is provided on the cover plate.

[0016] The beneficial effects of this invention are as follows: 1. This invention, through the cooperation of a first drying component, a second drying component, and a material buffer component, enables multi-stage drying of materials, achieving gradual and deep drying of boric acid materials. The upward-sloping air inlet design in the first drying component serves to slow down material feeding, break up agglomerates, and facilitate counter-current drying. The dust recovery component can separate and recover fine dust in real time during the material drying process, effectively reducing material loss and improving the working environment. Furthermore, the blades in the second drying component simultaneously function as mechanical tumbling and hot air jets, increasing the contact area and uniformity between the material and the heat medium, which is beneficial for rapid material drying.

[0017] 2. By setting up an inclined downward air inlet two and coating the inner walls of drying tube one, drying tube two and buffer tube with a Teflon coating that mimics the lotus leaf effect, the present invention can reduce the amount of material adhering to the wall surface, thereby improving the material's fluidity and heating uniformity, which is beneficial to the uniform drying of the material. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the main structure of the present invention; Figure 3 This is a schematic diagram of the front cross-sectional structure of the present invention; Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 This is a partial structural schematic diagram of the side cross-section of the present invention; Figure 6 This is a schematic diagram of the first top-view cross-sectional structure of the present invention; Figure 7 This is a schematic diagram of the second top-view cross-sectional structure of the present invention; Figure 8 This is a top cross-sectional view of another embodiment of the present invention; Figure 9 This is a three-dimensional structural schematic diagram of the main cross-section of the dust recovery component in this invention.

[0019] In the diagram: 1. Base; 2. First drying assembly; 21. Drying pipe one; 211. Air inlet one; 212. Upper section; 2121. Air inlet two; 213. Lower section; 22. Housing one; 221. Air inlet pipe one; 23. Cavity one; 24. Dust recovery assembly; 241. Housing two; 242. Filter plate one; 243. Cavity two; 244. Exhaust pipe; 25. Housing three; 26. Cavity three; 27. Air inlet pipe two; 3. Second drying assembly; 31. Drying pipe two; 32. Heating assembly; 321. Mounting shell; 322. Mounting cavity; 323. Heating plate; 33. Mixing and drying assembly; 331. Air supply shaft; 3311. Flow channel; 332. Blade body; 3321. Air outlet; 333. Power assembly; 3331. Mounting pipe; 3332. Motor; 3333. Gear one; 3334. Gear two; 3335. Support plate; 34. Discharge plate; 35. C-shaped frame; 36. Air supply duct; 4. Butterfly valve; 5. Material buffer assembly; 51. Discharge pipe; 52. Buffer pipe; 53. Shell four; 54. Filter plate two; 55. Cover plate; 56. Cavity four; 57. Air inlet pipe three; 58. Air inlet three; 6. Support rod. Detailed Implementation

[0020] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0021] like Figures 1-9 As shown, a boric acid drying device includes a base 1, a first drying component 2, a second drying component 3, and a stirring and air-drying component 33. The base 1 mainly serves as a support for the installation, providing a carrier for the corresponding components to ensure stable operation of the equipment. Both the first drying component 2 and the second drying component 3 are used to dry the material.

[0022] like Figures 1-3 As shown, the first drying component 2 is disposed on the upper side of the base 1 and is used for preliminary drying of the material.

[0023] Specifically, the first drying assembly 2 includes a drying tube 21 and a housing 22. The drying tube 21 is cylindrical, and its axis is vertically aligned. The housing 22 is concentrically fixed to the lower side of the outer wall of the drying tube 21, forming an annular cavity 23 between the housing and the outer wall of the drying tube 21. Multiple upwardly inclined air inlets 211 are provided on the lower circumference of the drying tube 21, and these air inlets 211 communicate with the cavity 23. An air inlet pipe 221 communicating with the cavity 23 is fixedly connected to the housing 22.

[0024] In operation, external hot air is introduced into cavity 23 through air inlet pipe 221, and then into drying pipe 21 through multiple upward-sloping air inlets 211. This air then comes into counter-current contact with the falling material, achieving initial heat exchange and moisture evaporation. The upward-sloping design of the air inlets 211 creates a disturbance in the airflow, reducing the material's feeding speed and increasing its dwell time, which is beneficial for drying. Furthermore, the airflow also initially breaks up the material, reducing agglomeration, allowing for more uniform heating when the material subsequently enters the second drying component 3.

[0025] It should be noted that the multiple air inlets 211 are arranged in a ring array about the axis of the drying tube 21. Multiple air inlets 221 can also be arranged in a ring array about the axis of the drying tube 21. This allows for more uniform distribution of hot air entering the drying tube 21, thus improving the drying process of the material.

[0026] In addition, such as Figure 2 , Figure 3 and Figure 9 As shown, the drying tube 21 includes an upper section 212 and a lower section 213, with the upper section 212 positioned above the lower section 213.

[0027] The first drying assembly 2 also includes a dust recovery assembly 24. The dust recovery assembly 24 includes a housing 241 and an annular filter plate 242, with filter holes on the filter plate 242 arranged axially along the radial direction of the drying tube 21.

[0028] The filter plate 242 is concentrically and fixedly connected to the drying tube 21, and the inner diameter of the filter plate 242 can be the same as that of the drying tube 21. The upper and lower sides of the filter plate 242 are respectively fitted to the bottom of the upper section 212 and the top of the lower section 213, thus improving the sealing performance between the filter plate 242 and the upper and lower sections 212 and 213. Alternatively, sealing gaskets can be placed between the upper side of the filter plate 242 and the bottom of the upper section 212, and between the lower side of the filter plate 242 and the top of the lower section 213, to further improve the sealing performance.

[0029] The second housing 241 is fixedly connected to the outside of the first filter plate 242, forming a cavity 243 between them. An exhaust pipe 244 communicating with the cavity 243 is fixedly connected to the second housing 241. It should be noted that the first air inlet 211 is located on the lower section 213. Furthermore, the second housing 241 can be fixedly connected to the outer walls of both the upper section 212 and the lower section 213 simultaneously using screws.

[0030] During operation, when hot air enters the drying tube 21 through the air inlet 211 to dry the material, some fine dust particles in the material will rise with the airflow. At this time, the air in the cavity 243 is extracted through the exhaust pipe 244, creating a negative pressure inside the cavity 243. This causes the fine dust particles in the drying tube 21 to be drawn into the cavity 243 through the filter plate 242 and then extracted and recovered through the exhaust pipe 244, thereby reducing material loss and improving the environment. Larger particles are intercepted by the filter plate 242 and fall under the influence of gravity.

[0031] As an optional embodiment, the number of extraction pipes 244 can also be set to multiple, and the multiple extraction pipes 244 are distributed in a ring array about the axis of the drying pipe 21. This allows for the absorption of fine dust from multiple angles and positions, thereby enabling more comprehensive and rapid recovery of fine dust.

[0032] Additionally, as shown in Figure 3, the upper section 212 has multiple downwardly inclined air inlets 2121 on its circumference. A housing 25 is concentrically fixed to the outer wall of the upper section 212, forming a cavity 26 between the housing 25 and the outer wall of the upper section 212. An air inlet pipe 27 communicating with the cavity 26 is fixedly connected to the housing 25.

[0033] In the normal drying mode, inlet 1 (211) is the main hot air inlet with a relatively high air velocity. Inlet 2 (2121) is the auxiliary hot air inlet with a lower air velocity, used to assist the hot air blown in from inlet 1 (211) in drying and agitating the material. This allows the material to be dried simultaneously from both top and bottom while slowing it down, which helps to improve the drying speed. The specific air velocity can be set according to the actual working conditions.

[0034] When the material enters the second drying component 3 through the first drying component 2, if there is material adhering to the inner wall of the drying tube 21, the air intake from the air inlet 211 can be stopped, and the air intake from the air inlet 2121 can be increased. The airflow entering from the air inlet 2121 will remove the material adhering to the drying tube 21. The removed material will enter the second drying component 3 under the action of airflow and gravity to continue drying.

[0035] In addition, such as Figures 1-3As shown, the second drying component 3 is disposed on the base 1 and is located below the first drying component 2.

[0036] Specifically, the second drying assembly 3 includes a second drying tube 31, a heating assembly 32, and a stirring and air-drying assembly 33. The second drying tube 31 is concentrically arranged with the first drying tube 21, and the inner diameter of the second drying tube 31 can be the same as that of the first drying tube 21. The top of the second drying tube 31 is connected to the bottom of the first drying tube 21, forming a continuous drying channel. The heating assembly 32 is disposed on the outer wall of the second drying tube 31 and is used to heat the interior of the second drying tube 31, providing the heat required for drying the material. A discharge port is provided on the lower side of the second drying tube 31 for discharging the dried material.

[0037] Among them, such as Figure 3 and Figure 7 As shown, the heating assembly 32 includes a mounting shell 321 and multiple heating plates 323. The mounting shell 321 concentrically wraps around the outer wall of the drying tube 31 and is fixedly connected to the outer wall of the drying tube 31. A mounting cavity 322 is formed between the mounting shell 321 and the outer wall of the drying tube 31, and the multiple heating plates 323 are evenly distributed in the mounting cavity 322. The heating plates 323 are fixedly connected to the outer wall of the drying tube 31. The heating plates 323 can be electric heating plates, which are existing technology, but other suitable heating plates 323 can also be selected.

[0038] In use, the heating plate 323 is first activated to heat the temperature inside the second drying tube 31 to the preset temperature. After the material falls into the second drying tube 31 through the first drying tube 21, the material can be dried again. The hot steam after drying can be discharged through the exhaust pipe 244 and the top of the first drying tube 21.

[0039] Multiple heating plates 323 are evenly distributed in the mounting cavity 322, which can uniformly heat the tube wall of the drying tube 31, avoiding local overheating or insufficient heating, thereby making the material more evenly heated.

[0040] In addition, such as Figures 2-6 As shown, the stirring and drying assembly 33 includes an air supply shaft 331, multiple blade groups, and a power assembly 333. The air supply shaft 331 is coaxially disposed within the drying tube 31, and a flow channel 3311 is formed along its axial direction within the air supply shaft 331 for conveying hot air. Multiple blade groups are spaced apart along the axial direction of the air supply shaft 331, and each blade group includes multiple blade bodies 332. Multiple air outlets 3321 communicating with the flow channels 3311 are formed on the blade bodies 332, and the air outlets 3321 are located on the upper surface of the blade bodies 332. The power assembly 333 is located at the bottom of the drying tube 31 and is used to drive the air supply shaft 331 to rotate.

[0041] The power assembly 333 includes a mounting pipe 3331, a motor 3332, a first gear 3333, a second gear 3334, and a support plate 3335. The mounting pipe 3331 is concentrically arranged with the second drying pipe 31, and the inner diameter of the mounting pipe 3331 can be the same as that of the second drying pipe 31. The top of the mounting pipe 3331 is fixedly connected to the bottom of the second drying pipe 31, and the bottom of the mounting pipe 3331 is fixedly connected to the base 1. The support plate 3335 is concentrically fixedly connected inside the mounting pipe 3331, and the air supply shaft 331 is rotatably connected to the support plate 3335. The motor 3332 is disposed inside the mounting pipe 3331 and fixedly connected to the base 1. The first gear 3333 and the second gear 3334 are fixedly connected to the output end of the motor 3332 and the air supply shaft 331, respectively, and the first gear 3333 and the second gear 3334 mesh with each other.

[0042] The second drying assembly 3 also includes an inverted bracket 35 and an air supply duct 36. The inverted bracket 35 is disposed inside the mounting pipe 3331 and fixedly connected to the base 1, with its opening facing downwards. One end of the air supply duct 36 passes through the top of the inverted bracket 35 and connects to the bottom of the air supply shaft 331, while the other end extends out of the mounting pipe 3331 and connects to an external air source. The inverted bracket 35 provides stable support for the air supply duct 36. The air supply duct 36 can introduce external hot air into the flow channel 3311 inside the air supply shaft 331, ensuring that hot air can be continuously and stably supplied to the air outlet 3321 of the blade body 332, thereby achieving the drying of the material. It should be noted that the air supply duct 36 is fixedly connected to the C-shaped frame 35, and the air supply duct 36 is rotatably connected to the air supply shaft 331. This can prevent the air supply duct 36 from rotating with the air supply shaft 331, thus improving the stability of the air supply from the air supply duct 36.

[0043] In use, the motor 3332 is started, and the motor 3332 drives the air supply shaft 331 to rotate sequentially through gear one 3333 and gear two 3334. The rotation of the air supply shaft 331 in turn drives multiple blade bodies 332 to rotate. The rotation of the blade bodies 332 can stir and tumble the material, so that the material can be fully heated. The dried material can be discharged through the discharge port.

[0044] While the blade body 332 agitates the material, the hot air delivered from the air outlet 3321 on the blade body 332 further dries the material inside, thereby accelerating the drying speed. Furthermore, by positioning the air outlet 3321 on the upper surface of the blade body 332, the hot air delivered upwards from the air outlet 3321 when the material falls from drying tube 1 21 to drying tube 2 31 reduces the material's descent speed, increases its residence time in the air, and further agitates the material, thus facilitating rapid drying.

[0045] As an optional embodiment, such as Figure 1 As shown, the boric acid drying equipment also includes a butterfly valve 4. The top and bottom of the butterfly valve 4 are fixedly connected to the bottom of drying pipe 21 and the top of drying pipe 31, respectively. The butterfly valve 4 is used to control the connection between drying pipe 21 and drying pipe 31. Through the butterfly valve 4, the flow rate and time of material entering the second drying component 3 from the first drying component 2 can be flexibly controlled according to the material's moisture content and drying requirements, thereby allowing for better control of the drying process and improving product quality.

[0046] As an optional embodiment, a discharge butterfly valve can also be installed at the discharge port to flexibly control the flow rate and time of material discharge from drying pipe 2 31 according to the moisture content and drying requirements of the material.

[0047] In addition, such as Figure 3 As shown, the second drying assembly 3 also includes a discharge plate 34. The discharge plate 34 is fixedly connected inside the drying tube 31. The side of the discharge plate 34 near the discharge port is flush with the bottom of the discharge port, and the side of the discharge plate 34 away from the discharge port is higher than the discharge port. The air supply shaft 331 is slidably connected to the discharge plate 34 in the vertical direction. The inclined design of the discharge plate 34 facilitates the discharge of material from the discharge port and reduces the accumulation of material on the discharge plate 34. In addition, the discharge plate 34 can also act as a baffle to separate the material from the power assembly 333.

[0048] The air supply shaft 331 is slidably connected to the unloading plate 34 in the vertical direction, which allows the air supply shaft 331 to rotate normally.

[0049] As an optional embodiment, such as Figure 8 As shown, the blade bodies 332 at different heights are staggered along the axial direction of the air supply shaft 331. This allows more material to fall onto the blade bodies 332 as it falls, and the material falling onto the blade bodies 332 will bounce, thus increasing the material's dwell time. Furthermore, the material falling onto the blade bodies 332 can be closer to the air outlet 3321, which is beneficial for rapid drying of the material.

[0050] Furthermore, the blade body 332 is angled relative to the horizontal plane, meaning it is inclined. This inclined arrangement of the blade body 332 provides stronger agitation and mixing of the material, further increasing the contact area between the material and the hot air and improving drying uniformity. On the other hand, the material falling onto the blade body 332 rebounds towards the inner wall of the drying tube 31, thus increasing its contact with the heat source and improving the drying speed.

[0051] In addition, such as Figures 1-3As shown, the boric acid drying equipment also includes a material buffer assembly 5. The material buffer assembly 5 includes a discharge pipe 51, a buffer pipe 52, a housing 53, a filter plate 54, and a cover plate 55. The buffer pipe 52 is fixedly connected to the base 1, and its axis is parallel to the axis of the drying pipe 21. Both ends of the discharge pipe 51 are connected to the discharge port and the interior of the buffer pipe 52, respectively. Specifically, the distance from the connection point between the discharge pipe 51 and the discharge port to the base 1 is higher than the distance from the connection point between the discharge pipe 51 and the interior of the buffer pipe 52 to the base 1. This facilitates the discharge of material from the drying pipe 21 into the buffer pipe 52.

[0052] The housing 4 53 concentrically wraps around the outer wall of the buffer tube 52, forming a cavity 4 56 between the housing 4 53 and the outer wall of the buffer tube 52. The housing 4 53 is fixedly connected to the outer wall of the buffer tube 52. Multiple air inlets 3 58 are opened circumferentially on the lower side of the buffer tube 52, and the air inlets 3 58 communicate with the cavity 4 56. An air inlet pipe 3 57 communicating with the cavity 4 56 is fixedly connected to the housing 4 53.

[0053] Filter plate 54 is concentrically fixed to the upper side inside the buffer tube 52, and the height of filter plate 54 from the base 1 is higher than the height of the connection between the discharge pipe 51 and the inside of the buffer tube 52 from the base 1. This allows material to directly enter the buffer tube 52 from the drying pipe 31, avoiding interference with filter plate 54. Filter plate 54 is a cylindrical structure with multiple filter holes inside, and its diameter is the same as the inner diameter of the buffer tube 52. Cover plate 55 is used to seal the top of the buffer tube 52, and it has a through hole. Additionally, a discharge port is provided on the lower side of the buffer tube 52. The discharge port is normally sealed and opens when discharge is required.

[0054] During use, hot air can be blown into the buffer tube 52 through the air inlet 3 57, cavity 4 56, and air inlet 3 58 to continue evaporating the small amount of moisture contained in the material. Dust contained in the material will be recovered through the filter plate 2 54 and the through-holes. It should be noted that the temperature of the hot air here is between room temperature and the temperature inside the drying tube 2 31. This provides a cooling buffer for the material, preventing it from absorbing moisture due to a sudden drop in ambient temperature, thereby improving the product quality.

[0055] As an optional embodiment, such as Figure 3 As shown, a support rod 6 is fixedly connected inside the drying tube 31, and the top of the air supply shaft 331 is rotatably connected to the support rod 6, which makes the rotation of the air supply shaft 331 more stable.

[0056] As an optional embodiment, the inner walls of drying tube 21, drying tube 31, and buffer tube 52 are all coated with a Teflon coating, which has excellent anti-stick properties. Furthermore, the surface of the Teflon coating is formed with dense micron-sized pits and hydrophobic protrusions through laser etching or molding. This micro-rough surface, mimicking the lotus leaf effect, reduces the actual contact area and adhesion points between the material and the wall surface, thereby reducing the likelihood of material adhering to the wall surface.

[0057] Additionally, it should be noted that air inlet pipe 1 221, air extraction pipe 244, air inlet pipe 2 27, air supply pipe 36, and air inlet pipe 3 57 can each correspond to an external air source.

[0058] This application may also include a controller, which can be electrically connected to the power system of the butterfly valve 4, the motor 3332, the heating plate 323 and multiple external air sources, and is used to control the butterfly valve 4, the motor 3332, the heating plate 323 and the multiple external air sources to perform corresponding actions.

[0059] The embodiments of this example have been described above. However, this example is 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 based on the guidance of this example, and all of them are within the protection scope of this example.

Claims

1. A boric acid drying device, characterized in that, Includes base (1); The first drying assembly (2) includes a drying tube (21) and a housing (22). The housing (22) is concentrically disposed on the outer wall of the drying tube (21) and forms a cavity (23) between it and the outer wall. The lower side of the drying tube (21) is provided with a plurality of inclined upward air inlets (211), which are connected to the cavity (23). The housing (22) is provided with an air inlet tube (221) that is connected to the cavity (23). The second drying component (3) is set on the base (1) and includes a second drying tube (31), a heating component (32) and a stirring and drying component (33). The second drying tube (31) is concentrically arranged with the first drying tube (21), and the top of the second drying tube (31) is connected to the bottom of the first drying tube (21). The heating component (32) is set on the outer wall of the second drying tube (31) for heating the inside of the second drying tube (31). The lower side of the second drying tube (31) is provided with a discharge port. The stirring and drying assembly (33) includes an air supply shaft (331), multiple blade groups and a power assembly (333). The air supply shaft (331) is coaxially arranged inside the drying tube (31), and a flow channel (3311) is opened in the air supply shaft (331) along its axial direction. Multiple blade groups are spaced apart along the axial direction of the air supply shaft (331). Each blade group includes multiple blade bodies (332). Multiple air outlets (3321) communicating with the flow channels (3311) are opened on the blade bodies (332). The power assembly (333) is located at the bottom of the drying tube (31) and is used to drive the air supply shaft (331) to rotate.

2. The boric acid drying equipment according to claim 1, characterized in that, The boric acid drying equipment also includes a butterfly valve (4), the top and bottom of which are fixedly connected to the bottom of the first drying tube (21) and the top of the second drying tube (31), respectively. The butterfly valve (4) is used to control the connection between the first drying tube (21) and the second drying tube (31).

3. The boric acid drying equipment according to claim 1, characterized in that, The drying tube (21) includes an upper section (212) and a lower section (213); The first drying component (2) further includes a dust recovery component (24), which includes a housing second (241) and an annular filter plate first (242). The filter plate first (242) is concentrically arranged with the drying tube first (21), and the upper and lower sides of the filter plate first (242) are respectively attached to the bottom of the upper section (212) and the top of the lower section (213). The housing second (241) is arranged outside the filter plate first (242) and forms a cavity second (243) between the filter plate first (242). The housing second (241) is provided with an exhaust pipe (244) communicating with the cavity second (243). The housing second (241) is fixedly connected to both the upper section (212) and the lower section (213).

4. The boric acid drying equipment according to claim 3, characterized in that, The upper section (212) has multiple downwardly inclined air inlets (2121) in its circumference. A housing (25) is concentrically arranged on the outer wall of the upper section (212). A cavity (26) is formed between the housing (25) and the outer wall of the upper section (212). An air inlet pipe (27) communicating with the cavity (26) is provided on the housing (25).

5. The boric acid drying equipment according to claim 1, characterized in that, The heating assembly (32) includes a mounting shell (321) and a plurality of heating plates (323). The mounting shell (321) is concentrically wrapped around the outer wall of the second drying tube (31) and forms a mounting cavity (322) between the mounting shell (321) and the outer wall of the second drying tube (31). The plurality of heating plates (323) are evenly distributed in the mounting cavity (322).

6. The boric acid drying equipment according to claim 1, characterized in that, The second drying assembly (3) further includes a discharge plate (34), which is disposed inside the second drying tube (31). The side of the discharge plate (34) near the discharge port is flush with the bottom of the discharge port, and the side of the discharge plate (34) away from the discharge port is higher than the discharge port. The air supply shaft (331) is slidably connected to the discharge plate (34) in the vertical direction.

7. The boric acid drying equipment according to claim 1, characterized in that, The power assembly (333) includes a mounting tube (3331), a motor (3332), a first gear (3333), a second gear (3334), and a support plate (3335). The mounting tube (3331) is concentrically arranged with the second drying tube (31), and the top of the mounting tube (3331) is fixedly connected to the bottom of the second drying tube (31). The support plate (3335) is concentrically arranged inside the mounting tube (3331), and the air supply shaft (331) is rotatably connected to the support plate (3335). The motor (3332) is fixedly connected inside the mounting tube (3331). The first gear (3333) and the second gear (3334) are fixedly connected to the output end of the motor (3332) and the air supply shaft (331), respectively, and the first gear (3333) and the second gear (3334) mesh with each other.

8. The boric acid drying equipment according to claim 7, characterized in that, The second drying assembly (3) also includes an i-shaped frame (35) and an air supply pipe (36). The i-shaped frame (35) is disposed inside the mounting pipe (3331) with its opening facing downward. One end of the air supply pipe (36) passes through the top of the i-shaped frame (35) and communicates with the bottom of the air supply shaft (331), while the other end extends out to the outside of the mounting pipe (3331) and communicates with an external air source.

9. The boric acid drying equipment according to claim 1, characterized in that, Along the axial direction of the air supply shaft (331), the blade bodies (332) at different heights are staggered with each other; and the blade bodies (332) are set at an angle with the horizontal plane.

10. The boric acid drying equipment according to claim 1, characterized in that, The boric acid drying equipment also includes a material buffer assembly (5), which includes a discharge pipe (51), a buffer pipe (52), a housing (53), a filter plate (54), and a cover plate (55). The buffer pipe (52) is set on the base (1). The two ends of the discharge pipe (51) are connected to the discharge port and the interior of the buffer pipe (52), respectively. The housing (53) is concentrically wrapped around the outer wall of the buffer pipe (52) and forms a cavity (56) between the housing (53) and the outer wall of the buffer pipe (52). Multiple air inlets (58) are opened in the circumferential direction of the buffer pipe (52). The air inlets (58) are connected to the cavity (56). An air inlet pipe (57) connected to the cavity (56) is provided on the housing (53). The filter plate (54) is concentrically set on the upper side of the buffer pipe (52). The cover plate (55) is used to seal the top of the buffer pipe (52). A through hole is opened on the cover plate (55).

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