A slurry defoaming mixing tank

Abstract

This utility model relates to the technical field of slurry defoaming equipment, and more particularly to a slurry defoaming mixing tank, comprising a cylindrical tank body; a stirring shaft driven by a motor is coaxially arranged inside the tank body; a stirring blade structure is fixedly arranged on the stirring shaft; the stirring blade structure includes two sets of stirring blades coaxial with the stirring shaft and rotating around the outside of the stirring shaft; the two sets of stirring blades rotate and wind in the same direction; the two sets of stirring blades have different outer diameters. The purpose of this utility model is to provide a slurry defoaming mixing tank, and the technical solution provided by this utility model solves the technical problems of large fluctuations in the stirred liquid and incomplete removal of bubbles in current mixing tanks.

Description

Technical Field

[0001] This utility model relates to the technical field of slurry degassing equipment, and in particular to a slurry degassing mixing tank. Background Technology

[0002] In the lithium battery manufacturing industry, stirring tanks are often needed to perform a degassing process on the positive and negative electrode slurries or electrolytes to remove gas from the slurry or electrolyte and improve the quality of the finished lithium battery.

[0003] The mixing tanks used in the current degassing process have internal mixing blades with double-blade fan-shaped or fan-shaped blades, which result in high mixing resistance, large fluctuations in the agitated liquid, and technical problems such as incomplete bubble removal. Utility Model Content

[0004] The purpose of this invention is to provide a slurry degassing mixing tank. The technical solution provided by this invention solves the technical problems of large fluctuations in the stirred liquid and incomplete removal of bubbles in current mixing tanks.

[0005] To solve the above-mentioned technical problems, this utility model provides a slurry degassing mixing tank, including a cylindrical tank body; a stirring shaft driven by a motor is coaxially arranged inside the tank body; a stirring blade structure is fixedly arranged on the stirring shaft; the stirring blade structure includes two sets of stirring blades coaxial with the stirring shaft and rotating around the stirring shaft; the two sets of stirring blades rotate and wind in the same direction; the two sets of stirring blades have different outer diameters.

[0006] Preferably, the two sets of stirring blades rotate clockwise or counterclockwise from bottom to top along the axial direction of the stirring shaft.

[0007] Preferably, any group of stirring blades includes several axially symmetrical spiral rods; the spiral rods are fixedly connected to the stirring shaft by connecting rods.

[0008] Preferably, the two sets of stirring blades are distributed in a cross pattern.

[0009] Preferably, the pitch of the two sets of stirring blades is the same, and the ratio of their outer diameters is 2:1 to 1.2:1.

[0010] Preferably, the distance between the outer stirring blade and the inner wall of the tank is 10mm-15mm.

[0011] Preferably, the tank body is respectively provided with a feed valve for feeding, a discharge valve for discharging, a drain valve for discharging wastewater generated during cleaning of the tank body, a liquid level display tube for displaying the liquid level, a photoelectric sensor switch for detecting the liquid volume, and a pressure gauge for detecting the pressure inside the tank body.

[0012] Compared with the prior art, the slurry degassing mixing tank provided by this utility model has a stirring blade structure for removing bubbles. The stirring blade can rotate under the drive of the stirring shaft, collide with the liquid, and promote the expulsion of bubbles. Because it is spiral-shaped, it can increase the contact area between the stirring frame and the liquid, and gradually pushes the liquid surface upward. The inner and outer double spirals make the stirring frame more fully in contact with the liquid. During operation, the negative pressure is drawn in the tank, making the degassing function faster and more effective. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the tank structure according to an embodiment of this application;

[0014] Figure 2 This is a schematic diagram of the stirring blade structure in an embodiment of this application;

[0015] Figure 3 This is a bottom view of the stirring blade structure according to an embodiment of this application;

[0016] Figure 4 This is a cross-sectional view of the stirring blade structure in an embodiment of this application. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] In the lithium battery manufacturing industry, the stirring tanks used in the current degassing process employ stirring blade mechanisms, which result in high stirring resistance, large fluctuations in the stirred liquid, and technical problems such as incomplete bubble removal.

[0019] To address the aforementioned technical issues, this embodiment provides a slurry degassing mixing tank, which is mainly used in lithium battery production lines, specifically in the slurry and electrolyte degassing process section of the new energy lithium battery industry.

[0020] Please see Figures 1-2Specifically, it includes a tank 10, which is a fully enclosed cylindrical tank made of stainless steel. A drain valve 11 is connected to the bottom of the tank 10 to drain the waste liquid generated during the cleaning of the tank cavity; a liquid level display tube 12 is installed on the side wall to display the liquid level in real time; upper and lower limit photoelectric sensor switches are also installed to monitor the liquid volume in the tank in real time; liquid input and output connection control pipes are placed on the side wall, and inlet valve 13 and outlet valve 14 are respectively installed on the input pipe and the output pipe; a pressure gauge 15, a one-way valve atmospheric pressure channel, and a vacuum negative pressure channel are installed on the top cover of the tank 10; a stirring motor 20 is also installed on the top cover of the tank 10, and the stirring shaft 30 is encapsulated in a frame oil seal through rolling bearings.

[0021] To achieve degassing of the slurry, in this embodiment, the stirring shaft 30 is disposed inside the tank 10 and coaxially with the tank 10, and is driven by a motor. A stirring blade structure 40 is fixedly disposed on the stirring shaft 30.

[0022] It should be noted that the slurry degassing mixing tank provided in this embodiment is used in the process of removing air bubbles from slurry or electrolyte. Its purpose is to remove air bubbles from the slurry, rather than to mix it evenly. The design of the stirring blade structure 40 is particularly important.

[0023] Please see Figure 3 In this embodiment, the stirring blade structure 40 includes two sets of stirring blades 41 coaxial with the stirring shaft 30 and rotating around the stirring shaft 30. The two sets of stirring blades 41 rotate in the same direction, but have different outer diameters. If the two sets of stirring blades 41 rotate in opposite directions, their combined action can quickly and evenly stir the slurry, but it will also introduce a large amount of gas into the slurry, causing more bubbles to form. In this embodiment, stirring blades 41 rotate in the same direction, which slowly compress the slurry rather than stirring it during rotation. After compression, the slurry gradually releases bubbles, and under the negative pressure inside the tank 10, the bubbles can be completely expelled. The two sets of stirring blades 41 rotate clockwise or counterclockwise from bottom to top along the axial direction of the stirring shaft 30.

[0024] In this embodiment, the stirring blade 41 rotates counterclockwise from bottom to top around the stirring shaft 30 as the axis, viewed from above.

[0025] This embodiment employs two sets of stirring blades 41 with different outer diameters, enabling the stirring of slurry at different locations within the tank 10 and avoiding dead zones caused by defoaming. Please refer to... Figures 3-4Specifically, in this embodiment, both sets of stirring blades 41 include several axially symmetrical spiral rods 42, which are fixedly connected to the stirring shaft 30 by connecting rods 43. The spiral rods 42 can be made of round steel. This embodiment uses two spiral rods 42 as an example for detailed explanation. The two sets of stirring blades 41 are a first stirring blade 411 and a second stirring blade 412. The first stirring blade 411 includes two first spiral rods 421, and the second stirring blade 412 includes two second spiral rods 422. The outer diameter of the first spiral rods 421 is larger than the outer diameter of the second spiral rods 422.

[0026] Please see Figure 4 The two sets of stirring blades 41 are arranged in a crisscross pattern, and the four spiral rods are also arranged in a crisscross pattern, specifically: first spiral rod 421, second spiral rod 422, first spiral rod 421, and second spiral rod 422. This arrangement of spiral rods can fully cover the slurry in the tank 10 during the stirring process, resulting in more thorough defoaming.

[0027] The two sets of stirring blades 41 have the same pitch and an outer diameter ratio of 2:1 to 1.2:1. The outer diameter ratio can be adjusted according to the diameter of the screw rod 42 and the inner diameter of the tank 10.

[0028] Furthermore, the distance between the outer stirring blade 41 and the inner wall of the tank 10 is 10mm-15mm. That is, the distance between the first spiral rod 421 and the inner wall of the tank 10 can be 10mm-15mm.

[0029] In summary, the slurry degassing mixing tank provided in this embodiment uses a stirring blade structure to remove air bubbles. This blade rotates under the drive of the stirring shaft, colliding with the liquid and causing the air bubbles to be expelled. Because the stirring blade structure adopts a unidirectional double helix structure with two intersecting inner and outer layers, it can increase the contact area between the stirring frame and the liquid and gradually push the liquid surface upward. The two sets of inner and outer double helices make the contact between the stirring frame and the liquid more sufficient. During operation, the negative pressure is drawn into the tank, making the degassing function faster and more effective.

[0030] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A slurry defoaming mixing tank, characterized in that: The device includes a cylindrical tank; a stirring shaft driven by a motor is coaxially arranged inside the tank; a stirring blade structure is fixedly arranged on the stirring shaft; the stirring blade structure includes two sets of stirring blades coaxial with the stirring shaft and rotating around the stirring shaft; the two sets of stirring blades rotate and wind in the same direction; the two sets of stirring blades have different outer diameters.

2. The slurry defoaming mixing tank according to claim 1, characterized in that: The two sets of stirring blades rotate clockwise or counterclockwise from bottom to top along the axial direction of the stirring shaft.

3. The slurry defoaming mixing tank according to claim 2, characterized in that: Each set of stirring blades includes several axially symmetrical spiral rods; the spiral rods are fixedly connected to the stirring shaft by connecting rods.

4. The slurry defoaming mixing tank according to claim 3, characterized in that: The two sets of stirring blades are arranged in a cross pattern.

5. The slurry degassing mixing tank according to any one of claims 1-4, characterized in that: The pitch of the two sets of stirring blades is the same, and the ratio of their outer diameters is 2:1 to 1.2:

1.

6. The slurry defoaming mixing tank according to claim 5, characterized in that: The distance between the outer stirring blade and the inner wall of the tank is 10mm-15mm.

7. The slurry defoaming mixing tank according to claim 1, characterized in that: The tank is equipped with a feed valve for feeding materials, a discharge valve for discharging materials, a drain valve for discharging wastewater generated during cleaning of the tank, a liquid level display tube for displaying the liquid level, a photoelectric sensor switch for detecting the liquid volume, and a pressure gauge for detecting the pressure inside the tank.

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