Drying equipment

Abstract

This application provides a drying apparatus, including a primary drying mechanism, a secondary drying mechanism, and a hot air device. The primary drying mechanism includes a primary drying chamber and a conveyor. The primary drying chamber has a feed inlet facing the conveyor and connecting the primary drying chamber to the outside. The secondary drying mechanism includes a secondary drying chamber and a stirring mechanism. The secondary drying chamber is interconnected with the primary drying chamber. The stirring mechanism is disposed within the secondary drying chamber and configured to stir the material conveyed by the primary drying mechanism. The hot air device is connected to both the primary and secondary drying mechanisms and is configured to perform hot air drying on the materials within both chambers. By using a primary drying mechanism for preliminary drying and then a secondary drying mechanism for thorough drying, combined with the agitation of the stirring mechanism, surface moisture of the material can be removed, effectively solving the problem that traditional drying methods for powders can only remove surface moisture while internal moisture is difficult to completely evaporate.

Description

Technical Field

[0001] This application relates to the field of powder drying technology, specifically to a drying apparatus. Background Technology

[0002] During the manufacturing process of lithium-ion batteries, powder materials (such as ternary precursor powders) are easily affected by moisture in the air, resulting in a certain amount of moisture inside the ternary precursor powder, which can affect the performance of the battery. Existing drying equipment for ternary precursor powders commonly uses drying methods, which can only remove surface moisture, and the moisture inside the material is difficult to completely evaporate. Utility Model Content

[0003] To address the shortcomings of the existing technology, it is necessary to provide a drying device.

[0004] This application provides a drying apparatus, including a primary drying mechanism, a secondary drying mechanism, and a hot air device. The primary drying mechanism includes a primary drying chamber and a conveyor. The primary drying chamber has an inlet facing the conveyor and communicating with the outside. The conveyor is configured to receive material falling into the primary drying chamber through the inlet. The secondary drying mechanism includes a secondary drying chamber and a stirring mechanism. The secondary drying chamber is interconnected with the primary drying chamber. A conveyor belt is configured to transport material to the secondary drying chamber. The stirring mechanism is disposed within the secondary drying chamber and configured to stir the material conveyed by the conveyor belt. The hot air device is connected to both the primary and secondary drying mechanisms and is configured to perform hot air drying on the material within both chambers.

[0005] This application employs a primary drying mechanism for initial drying, followed by a secondary drying mechanism for thorough drying. This effectively removes surface moisture from the material, solving the problem in traditional drying methods where only surface moisture is removed while internal moisture remains largely unevaporated. Furthermore, a powerful stirring mechanism agitates and breaks up powder agglomerates, fully exposing internal pores. Combined with uniform hot air provided by the hot air device, this enhances the evaporation of moisture from the surface to the interior of the powder.

[0006] In some embodiments of this application, the secondary drying mechanism further includes a first spraying mechanism and a second spraying mechanism. The first spraying mechanism is disposed in the secondary drying chamber and located on the side close to the conveyor, and is configured to spray the material conveyed on the conveyor. The second spraying mechanism is disposed in the secondary drying chamber and located on the side of the first spraying mechanism away from the conveyor, and is configured to perform a secondary spraying of the material sprayed by the first spraying mechanism.

[0007] In some embodiments of this application, the first spraying mechanism includes a first rotating shaft disposed in the secondary drying chamber and a first stirring paddle disposed on the first rotating shaft. The first stirring paddle has an arc-shaped structure and is recessed in the rotation direction of the first rotating shaft. The first stirring paddle is configured to spray at least a portion of the material to the second spraying mechanism.

[0008] In some embodiments of this application, the second spraying mechanism includes a second rotating shaft disposed in the secondary drying chamber and a second stirring paddle disposed on the second rotating shaft. The second stirring paddle is configured to spray the material sprayed by the first spraying mechanism a second time.

[0009] In some embodiments of this application, the stirring mechanism includes a third rotating shaft and a third stirring paddle disposed in the secondary drying chamber. The third rotating shaft is located below the first and second spraying mechanisms, and the end of the third stirring paddle away from the third rotating shaft abuts against the inner wall of the secondary drying chamber.

[0010] In some embodiments of this application, a magnetic element is provided on the outer periphery of the secondary drying chamber, and the magnetic element is configured to break down bound water in the material.

[0011] In some embodiments of this application, a comb plate is provided on the inner wall of the primary drying chamber. The comb plate is located on the upper side of the conveyor and is disposed towards the conveyor. The comb plate is configured to comb the material on the conveyor.

[0012] In some embodiments of this application, the inner wall of the primary drying chamber is further provided with a limiting part, which is located on the upper side of the conveyor and is configured to smooth the material on the conveyor.

[0013] In some embodiments of this application, a scraper is provided on the inner wall of the primary drying chamber. The scraper is located below the conveyor and faces the conveyor, and the scraper is configured to scrape off the material on the conveyor.

[0014] In some embodiments of this application, the hot air device includes a hot air blower, an air collection pipe connected to the hot air blower, and a branch pipe connected to the air collection pipe. The branch pipe includes a first branch pipe and a second branch pipe. The first branch pipe is connected to a primary drying chamber, and the second branch pipe is connected to a secondary drying chamber. The first branch pipe is configured to provide hot air to the primary drying chamber, and the second branch pipe is configured to provide hot air to the secondary drying chamber. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a drying apparatus according to one embodiment of this application.

[0016] Explanation of key component symbols: Drying device 1, primary drying mechanism 10, secondary drying mechanism 20, hot air device 30, primary drying chamber 101, conveyor 102, feed inlet 103, discharge outlet 104, secondary drying chamber 201, stirring mechanism 202, first spraying mechanism 21, second spraying mechanism 22, first rotating shaft 211, first stirring paddle 212, second rotating shaft 221, second stirring paddle 222, third rotating shaft 2021, third stirring paddle 2022, magnetic component 40, comb plate 50, limiting part 60, scraper 70, hot air blower 301, air collecting pipe 302, first branch pipe 303, second branch pipe 304.

[0017] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have a component that is centrally located. When a component is considered to be "located" on another component, it can be directly located on the other component or may also have a component that is centrally located.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] Please see Figure 1This application provides a drying apparatus 1, including a primary drying mechanism 10, a secondary drying mechanism 20, and a hot air device 30. The primary drying mechanism 10 includes a primary drying chamber 101 and a conveyor 102. The conveyor 102 can be a conveyor belt. The primary drying chamber 101 is provided with a feed inlet 103 facing the conveyor 102 and communicating with the outside. The conveyor 102 is configured to receive material falling into the primary drying chamber 101 through the feed inlet 103. The secondary drying mechanism 20 includes a secondary drying chamber 201 and a stirring mechanism 202. The secondary drying chamber 201 is interconnected with the primary drying chamber 101. The bottom of the secondary drying chamber 201 is provided with a discharge port 104 communicating with the outside. The discharge port 104 is configured to discharge the material dried in the secondary drying chamber 201. The conveying component 102 is also configured to convey the material to the secondary drying chamber 201. The stirring mechanism 202 is disposed inside the secondary drying chamber 201 and is configured to stir the material conveyed by the conveying component 102. A hot air device 30 is connected to both the primary drying mechanism 101 and the secondary drying mechanism 20, and is configured to perform hot air drying on the materials in the primary drying chamber 101 and the secondary drying chamber 201.

[0022] After the material to be dried enters the primary drying unit 10 through the feed inlet 103, the conveyor 102 transports the material that has been preliminarily dried in the primary drying chamber 101 to the secondary drying chamber 201. After being stirred by the stirring mechanism 202 and coming into contact with hot air, the material moves towards the bottom of the secondary drying chamber 201 under the action of gravity and the stirring action of the stirring mechanism 202, and is discharged through the discharge port 104.

[0023] After the hot air device 30 supplies hot air to the primary drying chamber 101 and the secondary drying chamber 201, at least a portion of the hot air can flow from the primary drying chamber 101 to the secondary drying chamber 201 along with the material conveying direction, and be discharged through the discharge port 104 at the bottom of the secondary drying chamber 201. Thus, the feed port 103 is mainly used for feeding, and the discharge port 104 is used for discharging the dried material and can also allow at least a portion of the hot air to be discharged. The exhaust air will not obstruct the material from entering the primary drying chamber 101 through the feed port 103.

[0024] This application employs a primary drying mechanism 10 for initial drying, followed by a secondary drying mechanism 20 for thorough drying. This effectively removes surface moisture from the material, solving the problem in traditional drying methods where only surface moisture is removed while internal moisture remains largely unevaporated. The powerful agitation mechanism 202, by forcefully turning and breaking up powder agglomerates, fully exposes internal pores. Combined with the uniform hot air provided by the hot air device 30, this enhances the evaporation effect of moisture from the surface to the interior of the powder.

[0025] Please see Figure 1In some embodiments of this application, the secondary drying mechanism 20 further includes a first spraying mechanism 21 and a second spraying mechanism 22. The first spraying mechanism 21 is disposed in the secondary drying chamber 201 and located on the side close to the conveyor 102. The first spraying mechanism 21 is configured to spray the material conveyed on the conveyor 102. The second spraying mechanism 22 is disposed in the secondary drying chamber 201 and located on the side of the first spraying mechanism 21 away from the conveyor 102. The second spraying mechanism 22 is configured to perform a secondary spraying of the material sprayed by the first spraying mechanism 21. Through the synergistic effect of the two-stage spraying, the first spraying mechanism 21 receives the material from the conveyor 102 and performs initial spraying, while the second spraying mechanism 22 takes over for secondary spraying. This completely breaks up the agglomerated structure of the material, significantly increases the contact area and time between the hot air and the material, solves the problem of uneven internal drying caused by traditional single-stage stirring, and ensures that deep moisture is fully evaporated.

[0026] Please see Figure 1 In some embodiments of this application, the first spraying mechanism 21 includes a first rotating shaft 211 disposed within the secondary drying chamber 201 and a first stirring paddle 212 disposed on the first rotating shaft 211. The first stirring paddle 212 has an arc-shaped structure and is recessed in the rotation direction of the first rotating shaft 211. The rotation direction is clockwise. The first stirring paddle 212 is configured to spray at least a portion of the material to the second spraying mechanism 22. The stirring paddle, which adopts an arc-shaped concave structure, has a unique curved surface that is concave in the rotation direction. When the first stirring paddle 212 rotates, the concave surface forms a material-collecting area to receive the material conveyed by the conveyor 102 and accurately project it along the tangential direction under the action of centrifugal force. The guiding effect generated by the arc-shaped structure allows the material to be sprayed along a stable trajectory, avoiding disordered splashing caused by straight blades. At the same time, the enveloping effect of the concave surface on the material reduces the impact force of the spraying and prevents the material from forming secondary agglomerates due to impact with the chamber wall. The concave structure of the arc-shaped stirring paddle generates a directional throwing force when rotating, accurately conveying the material to the second throwing mechanism 22, avoiding the material from hitting the cavity wall and clumping during the throwing process, while reducing energy consumption and improving material dispersion efficiency.

[0027] Please see Figure 1 In some embodiments of this application, the second spraying mechanism 22 includes a second rotating shaft 221 disposed within the secondary drying chamber 201 and a second stirring paddle 222 disposed on the second rotating shaft 221. The second stirring paddle 222 is configured to spray the material sprayed by the first spraying mechanism 21 a second time. The second stirring paddle 222 intercepts and sprays the material falling from the air a second time, forming a continuous dispersed flow, extending the suspension time of the material in the hot air, solving the problem of insufficient hot air penetration caused by the concentrated falling of material in traditional equipment, and improving the uniformity of moisture evaporation. In some embodiments, the second stirring paddle 222 is a straight stirring paddle.

[0028] Please see Figure 1In some embodiments of this application, the stirring mechanism 202 includes a third rotating shaft 2021 and a third stirring paddle 2022 disposed within the secondary drying chamber 201. The third rotating shaft 2021 is located below the first spraying mechanism 21 and the second spraying mechanism 22. The end of the third stirring paddle 2022 facing away from the third rotating shaft 2021 abuts against the inner wall of the secondary drying chamber 201. The design of the third stirring paddle 2022 closely fitting the chamber wall effectively scrapes off the material adhering to the chamber wall and agitates the accumulated material at the bottom, eliminating drying dead corners, preventing material caking, and ensuring overall drying consistency.

[0029] Please see Figure 1 In some embodiments of this application, a magnetic element 40 is provided on the outer periphery of the secondary drying chamber 201. The magnetic element 40 is configured to break down bound water in the material. The alternating magnetic field generated by the magnetic element 40 can weaken the molecular bond energy of bound water in the material, assisting in the thermal removal of crystal water that is difficult to eliminate by conventional drying, thereby improving the deep dehydration effect. Optionally, the magnetic element 40 is a magnetron, which can break down bound water in the material.

[0030] Please see Figure 1 In some embodiments of this application, a comb plate 50 is provided on the inner wall of the primary drying chamber 101. The comb plate 50 is located on the upper side of the conveyor 102 and is disposed toward the conveyor 102. The comb plate 50 is configured to comb the material on the conveyor 102.

[0031] Please see Figure 1 In some embodiments of this application, the inner wall of the primary drying chamber 101 is further provided with a limiting part 60, which is located on the upper side of the conveyor 102 and is configured to smooth the material on the conveyor 102.

[0032] Please see Figure 1 In some embodiments of this application, a scraper 70 is provided on the inner wall of the primary drying chamber 101. The scraper 70 is located below and faces the conveyor 102, and is configured to scrape off the material on the conveyor 102. The scraper 70 is installed below the rotating section of the conveyor 102. When the conveyor 102 passes the scraper 70, the scraper 70 can scrape off the material on the conveyor 102. Compared with the traditional shutdown cleaning method, this achieves the unity of continuous production and equipment cleanliness, and significantly improves the stability of system operation.

[0033] Please see Figure 1In some embodiments of this application, the hot air device 30 includes a hot air blower 301, an air collecting pipe 302 connected to the hot air blower 301, and a branch pipe connected to the air collecting pipe 302. The branch pipe includes a first branch pipe 303 and a second branch pipe 304. The first branch pipe 303 is connected to the primary drying chamber 101, and the second branch pipe 304 is connected to the secondary drying chamber 201. The first branch pipe 303 is configured to provide hot air to the primary drying chamber 101, and the second branch pipe 304 is configured to provide hot air to the secondary drying chamber 201.

[0034] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and substance of the technical solutions of this application.

Claims

1. A drying apparatus, characterized by, include: A primary drying mechanism includes a primary drying chamber and a conveyor. The primary drying chamber has a feed inlet facing the conveyor and communicating with the outside. The conveyor is configured to receive material falling into the primary drying chamber through the feed inlet. A secondary drying mechanism includes a secondary drying chamber and a stirring mechanism. The secondary drying chamber is interconnected with the primary drying chamber. The secondary drying chamber has a discharge port. The conveying component is configured to transport the material to the secondary drying chamber. The stirring mechanism is disposed within the secondary drying chamber and configured to stir the material conveyed by the conveying component. The discharge port is configured to discharge the material dried in the secondary drying chamber. A hot air device is connected to the primary drying mechanism and the secondary drying mechanism respectively, and the hot air device is configured to perform hot air drying on the materials in the primary drying chamber and the secondary drying chamber.

2. The drying apparatus according to claim 1, characterized by The secondary drying mechanism also includes: A first spraying mechanism is disposed in the secondary drying chamber and located on the side close to the conveyor, and the first spraying mechanism is configured to spray the material conveyed on the conveyor; and The second spraying mechanism is disposed in the secondary drying chamber and located on the side of the first spraying mechanism away from the conveyor. The second spraying mechanism is configured to spray the material sprayed by the first spraying mechanism a second time.

3. The drying apparatus according to claim 2, characterized in that, The first spraying mechanism includes a first rotating shaft disposed in the secondary drying chamber and a first stirring paddle disposed on the first rotating shaft. The first stirring paddle has an arc-shaped structure and is recessed in the rotation direction of the first rotating shaft. The first stirring paddle is configured to spray at least a portion of the material onto the second spraying mechanism.

4. The drying apparatus according to claim 2, characterized in that, The second spraying mechanism includes a second rotating shaft disposed in the secondary drying chamber and a second stirring paddle disposed on the second rotating shaft. The second stirring paddle is configured to spray the material sprayed by the first spraying mechanism a second time.

5. The drying apparatus according to claim 2, characterized in that, The stirring mechanism includes a third rotating shaft and a third stirring paddle disposed in the secondary drying chamber. The third rotating shaft is located below the first spraying mechanism and the second spraying mechanism, and the end of the third stirring paddle away from the third rotating shaft abuts against the inner wall of the secondary drying chamber.

6. The drying apparatus according to claim 1, characterized in that, A magnetic element is provided on the outer periphery of the secondary drying chamber, and the magnetic element is configured to break down the bound water in the material.

7. The drying apparatus according to claim 1, characterized in that, The inner wall of the primary drying chamber is provided with a comb plate, which is located on the upper side of the conveyor and facing the conveyor. The comb plate is configured to comb the material on the conveyor.

8. The drying apparatus according to claim 1, characterized in that, The inner wall of the primary drying chamber is also provided with a limiting part, which is located on the upper side of the conveyor and is configured to smooth the material on the conveyor.

9. The drying apparatus according to claim 1, characterized in that, The inner wall of the primary drying chamber is provided with a scraper, which is located below the conveyor and faces the conveyor, and is configured to scrape off the material on the conveyor.

10. The drying apparatus according to claim 1, characterized in that, The hot air device includes a hot air blower, an air collection pipe connected to the hot air blower, and a branch pipe connected to the air collection pipe. The branch pipe includes a first branch pipe and a second branch pipe. The first branch pipe is connected to the primary drying chamber, and the second branch pipe is connected to the secondary drying chamber. The first branch pipe is configured to provide hot air to the primary drying chamber, and the second branch pipe is configured to provide hot air to the secondary drying chamber.

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