Drying device

Abstract

The utility model relates to the technical field of lithium battery positive electrode materials, and discloses a drying device which is used for drying materials and comprises a drying assembly, a first air inlet, a second air inlet and a third air inlet, the drying assembly comprises a shell, and the shell is provided with a feeding port and a first air inlet through which the materials enter the shell; and the heating assembly communicates with the first air inlet and is used for heating the compressed air and then introducing the heated compressed air into the shell so as to increase the temperature in the shell and evaporate moisture in the materials. The heating assembly is arranged outside the shell, heated compressed air can be directly provided for the interior of the shell, the temperature in the shell can be rapidly increased, evaporation of moisture in materials is accelerated, and the drying efficiency can be improved; the heating assembly is connected with the first gas inlet to form a compressed gas transmission channel, the structure is simple, and the heating assembly is convenient to mount and dismount.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery positive pole material technical field, concretely relates to a drying device. BACKGROUND

[0002] The water absorption of lithium hydroxide used in preparation of lithium battery positive pole material is very strong, so that lithium hydroxide powder usually presents in the state of monohydrate lithium hydroxide, therefore, before mixing lithium hydroxide powder, it needs to carry out drying treatment first. The commonly used drying mode at present is to use disc dryer to dry. The working principle of disc dryer is as follows:

[0003] Material falls from the feeding port to the middle of the first layer of small drying disc, the rake arm with rake blade makes rotary motion to continuously stir the material, and the material flows along the exponential spiral line on the surface of small drying disc and is transferred to the outer edge, then falls from the outer edge to the outer edge of the next layer of large drying disc, and the material on the large drying disc moves to the center and falls from the middle feeding port to the middle of the next layer of small drying disc. Small drying disc and large drying disc are alternately arranged, and both small drying disc and large drying disc are hollow structures, and the hollow structure is filled with heating medium, and the material continuously passes through all drying discs to evaporate the water in the material. The dried material falls from the last layer of drying disc to the bottom of the shell and is transferred to the discharge port by the rake blade.

[0004] However, when using disc dryer to dry the material, the drying is completely relied on the drying disc, and the drying efficiency is low. CONTENT OF THE UTILITY MODEL

[0005] Therefore, the utility model provides a drying device to solve the problem that the drying is completely relied on the drying disc when the disc dryer is used to dry the material, and the drying efficiency is low.

[0006] The utility model provides a drying device for drying material, which comprises:

[0007] The drying assembly comprises a shell, the shell is provided with a feeding port and a first air inlet, and the material enters the shell through the feeding port;

[0008] The heating assembly is communicated with the first air inlet and used for heating compressed gas and then introducing the compressed gas into the shell to increase the temperature in the shell and evaporate the water in the material.

[0009] Advantages: the heating assembly is arranged outside the shell, which can directly provide heated compressed gas into the shell to quickly increase the temperature in the shell and accelerate the evaporation of water in the material, thereby improving the drying efficiency; the heating assembly is connected with the first air inlet to form a transmission channel of compressed gas, which is simple in structure and facilitates the installation and dismounting of the heating assembly.

[0010] In an alternative embodiment, the heating assembly comprises:

[0011] a gas storage member for storing the compressed gas;

[0012] a connecting member provided with a first hollow cavity, one end of the connecting member being connected to the gas storage member and the other end being connected to the first gas inlet, for heating the compressed gas when the compressed gas passes through the first hollow cavity.

[0013] Beneficial effects: By providing a gas storage member, the compressed gas can be stored for easy use; by providing a connecting member, a delivery channel for the compressed gas can be provided.

[0014] In an alternative embodiment, a heating member is provided in the first hollow cavity for heating the compressed gas.

[0015] Beneficial effects: By providing a heating member in the first hollow cavity, the compressed gas can be quickly heated.

[0016] In an alternative embodiment, the drying assembly comprises a plurality of drying members, the plurality of drying members being spaced apart along the length extension direction of the housing, the drying members being used for heating the material.

[0017] Beneficial effects: By providing a plurality of drying members in the housing, the contact area of the material with the drying members can be increased, thereby accelerating the evaporation of water in the material to improve the drying efficiency.

[0018] In an alternative embodiment, the drying member is a hollow structure, and a heating medium is filled in the cavity of the hollow structure.

[0019] In an alternative embodiment, the drying assembly comprises a first channel for providing the heating medium into the cavity.

[0020] In an alternative embodiment, the housing is provided with a discharge port, and at least one of the cavities near the discharge port is filled with a cooling medium.

[0021] Beneficial effects: By filling the cooling medium in the drying member near the discharge port, the temperature of the material before discharge can be reduced, preventing the material after discharge from being too hot to scald the downstream equipment.

[0022] In an alternative embodiment, the drying assembly comprises a second channel for providing the cooling medium into the cavity.

[0023] And / or, a control member is provided at the discharge port.

[0024] Beneficial effect: by setting the control member, the material discharge speed and the discharge amount can be controlled.

[0025] In an alternative embodiment, the shell is provided with an air outlet, and the drying device comprises:

[0026] A dust removal assembly is in communication with the air outlet and is used to discharge the gas in the shell after dust removal.

[0027] Beneficial effect: by setting the dust removal assembly, the material can be prevented from being discharged from the air outlet into the air, causing environmental pollution.

[0028] In an alternative embodiment, the dust removal assembly comprises:

[0029] A dust removal member is provided with a second hollow cavity, a second air inlet and an air outlet in communication with the second hollow cavity;

[0030] A driving member is used to collect the gas into the second hollow cavity;

[0031] A collecting member is arranged in the second hollow cavity and is arranged close to the air outlet and is used to collect the material in the gas. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0033] Figure 1 The structure diagram of the drying device of the embodiment of the present application.

[0034] Explanation of reference signs:

[0035] 1, drying assembly; 11, shell; 111, feed inlet; 112, first air inlet; 113, discharge outlet; 114, air outlet; 12, drying member; 13, control member; 2, heating assembly; 21, gas storage member; 22, connecting member; 3, dust removal assembly; 31, dust removal member; 311, second air inlet; 312, air outlet; 32, driving member; 33, collecting member. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme of the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0037] The embodiments of the utility model will be described below in combination with Figure 1

[0038] According to the embodiments of the utility model, a kind of drying device is provided, for drying material, comprising: drying component 1, including shell 11, shell is equipped with feed inlet 111 and first air inlet 112, material is entered into shell 11 by feed inlet 111;Heating component 2, with first air inlet 112 communication, for after heating compressed gas is passed into shell 11, to improve the temperature in shell 11, to evaporate the moisture in material.

[0039] By being provided with heating component 2 outside shell 11, compressed gas after heating can be directly provided to shell 11, to quickly improve the temperature in shell 11, to accelerate the evaporation of moisture in material, can improve drying efficiency;Heating component 2 is connected with first air inlet 112 to form the transmission channel of compressed gas, simple structure, facilitate the installation and disassembly of heating component 2.

[0040] Among them, material is lithium hydroxide powder, compressed gas is compressed air, and compressed air is treated by decarbonization and dehydration.As alternative embodiment, material can also be other materials that need to be dried, which is not limited here.As alternative embodiment, compressed gas can also be compressed nitrogen or compressed helium, which is not limited here.

[0041] As Figure 1 ​As shown in the figure, in one embodiment, the drying assembly 1 comprises a plurality of drying pieces 12, which are arranged at intervals along the length direction of the shell 11, and the drying pieces 12 are used for heating lithium hydroxide powder. Specifically, the drying piece 12 is a hollow structure, and the cavity of the hollow structure is filled with a heating medium; the drying assembly 1 comprises a first channel for providing the heating medium into the cavity. Among them, the drying piece 12 comprises large drying discs and small drying discs arranged alternately; the heating medium is water, the first channel is in communication with a hot water source, and the first channel is filled with water, which flows into one end of the drying piece 12 and flows out from the other end. By arranging a plurality of drying pieces 12 in the shell 11, the contact area of the lithium hydroxide powder and the drying piece 12 can be increased, and the evaporation of the water in the lithium hydroxide powder can be accelerated, so as to improve the drying efficiency. As a convertible embodiment, the heating medium can also be steam, oil, or other heat-conducting medium, which is not limited here.

[0042] As shown in the figure, Figure 1 In one embodiment, the shell 11 is provided with a discharge port 113, and two cavities close to the discharge port 113 are filled with cooling medium; the drying assembly 1 comprises a second channel for providing the cooling medium into the cavity. Among them, the cooling medium is water, the second channel is in communication with a cold water source, and the second channel is filled with water, which flows into one end of the drying piece 12 and flows out from the other end. By filling the cooling medium in the drying piece 12 close to the discharge port 113, the temperature of the lithium hydroxide powder before discharge can be reduced, and the lithium hydroxide powder after discharge can be prevented from being too high to scald the downstream equipment. As a convertible embodiment, the cooling medium can also be steam, oil, or other heat-conducting medium, which is not limited here. As a convertible embodiment, the drying piece 12 filled with cooling medium can also be one or three, which is not limited here.

[0043] As shown in the figure, Figure 1 In one embodiment, the discharge port 113 is provided with a control piece 13. Among them, the control piece 13 is a damper. By arranging the control piece 13, the discharge speed and the discharge amount of the lithium hydroxide powder can be controlled. As a convertible embodiment, the control piece 13 can also be a solenoid valve or a pneumatic valve, which is not limited here.

[0044] As shown in the figure, Figure 1As shown in the figure, in one embodiment, the heating assembly 2 comprises: a gas storage member 21 for storing compressed air; a connecting member 22 provided with a first hollow cavity, one end of the connecting member 22 is connected with the gas storage member 21, and the other end is connected with the first air inlet 112, for heating the compressed air when the compressed air passes through the first hollow cavity. Further, a heating member is arranged in the first hollow cavity for heating the compressed air. Wherein, the gas storage member 21 is a gas storage tank, the connecting member 22 is a steel pipe, and the heating member is a heating wire. By arranging the gas storage member 21, the compressed air can be stored for convenient use; by arranging the connecting member 22, a conveying channel for the compressed air can be provided; by arranging the heating member in the first hollow cavity, the compressed air can be quickly heated. As a variable implementation, the heating wire can also be wrapped around the outer surface of the steel pipe to heat the steel pipe and then heat the compressed air in the steel pipe, or the steel pipe can be placed in a high-temperature environment, which is not limited here.

[0045] As shown in the figure, Figure 1 In one embodiment, the shell 11 is provided with an air outlet 114, and the drying device comprises: a dust removal assembly 3 in communication with the air outlet 114, for removing dust from the gas in the shell 11 before discharging. By arranging the dust removal assembly 3, it can prevent lithium hydroxide powder from being discharged from the air outlet 114 into the air, causing environmental pollution.

[0046] As shown in the figure, Figure 1 In one embodiment, the dust removal assembly 3 comprises: a dust removal member 31 provided with a second hollow cavity, a second air inlet 311 and an air outlet 312 in communication with the second hollow cavity; a driving member 32 for collecting gas into the second hollow cavity; a collection member 33 arranged in the second hollow cavity and close to the air outlet 312, for collecting lithium hydroxide powder in the gas. Wherein, the dust removal member 31 is a spray tower, the driving member 32 is a fan, the collection member 33 is a water spray head, and the second air inlet 311 and the air outlet 114 are communicated by a pipeline.

[0047] The working principle of the drying device in this embodiment is as follows:

[0048] The lithium hydroxide powder enters the shell 11 from the feed inlet 111, and is sequentially dried by a plurality of drying discs filled with heating medium. At the same time, the compressed air is heated by the heating wire and then introduced into the shell 11 to accelerate the evaporation of moisture. Then, the lithium hydroxide powder is cooled and cooled by two drying discs filled with cooling medium, and then discharged from the discharge outlet 113. The gas is discharged from the air outlet 114 into the spray tower. When the gas passes through the water spray head, the lithium hydroxide powder in the gas is adsorbed by water molecules and falls to the bottom of the spray tower. The clean gas is discharged from the air outlet 312.

[0049] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope of the appended claims.

Claims

1. A drying apparatus for drying material, characterised in that, The application relates to a drying device. The drying device comprises: a drying assembly (1) comprising a shell (11) provided with a feeding port (111) and a first air inlet (112), wherein materials enter the shell (11) through the feeding port (111); 2. The drying apparatus according to claim 1, wherein a heating assembly (2) in communication with the first air inlet (112) and used for heating compressed gas and then introducing the compressed gas into the shell (11) to increase the temperature in the shell (11) and evaporate the moisture in the materials. The heating assembly (2) comprises: a gas storage member (21) used for storing the compressed gas; 3. The drying apparatus according to claim 2, wherein a connecting member (22) provided with a first hollow cavity, one end of the connecting member (22) is connected with the gas storage member (21), and the other end is connected with the first air inlet (112), so that the compressed gas is heated when passing through the first hollow cavity.

4. The drying apparatus according to any one of claims 1 to 3, characterized in that, A heating member is arranged in the first hollow cavity and used for heating the compressed gas.

5. The drying apparatus according to claim 4, wherein The drying assembly (1) comprises a plurality of drying members (12) arranged at intervals along the length extension direction of the shell (11), and the drying members (12) are used for heating the materials.

6. The drying apparatus according to claim 5, wherein The drying member (12) is a hollow structure, and a heating medium is filled in the cavity of the hollow structure.

7. The drying apparatus according to claim 5, wherein The drying assembly (1) comprises a first channel used for supplying the heating medium into the cavity.

8. The drying apparatus according to claim 7, wherein The shell (11) is provided with a discharging port (113), and at least one cavity close to the discharging port (113) is filled with a cooling medium. The drying assembly (1) comprises a second channel used for supplying the cooling medium into the cavity.

9. The drying apparatus according to any one of claims 1 to 3, characterized in that, And / or, a control member (13) is arranged at the discharging port (113). The shell (11) is provided with an air outlet (114), and the drying device comprises:

10. The drying apparatus according to claim 9, wherein a dust removal assembly (3) in communication with the air outlet (114) and used for removing dust from the gas in the shell (11) and then discharging the gas. The dust removal assembly (3) comprises: a dust removal member (31) provided with a second hollow cavity, a second air inlet (311) and an air outlet (312) in communication with the second hollow cavity; a driving member (32) used for collecting the gas into the second hollow cavity; a collecting member (33) arranged in the second hollow cavity and close to the air outlet (312) and used for collecting the materials in the gas.

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