Efficient stirrer applied to composite sodium ferric phosphate slurry

Abstract

The utility model discloses an efficient stirrer applied to composite sodium ferric phosphate slurry. The efficient stirrer comprises a top cover plate and a stirring tank body, a stirring shaft is longitudinally mounted in the center of the interior of the stirring tank body, and a driving motor quick connector is arranged at the end, extending out of the top cover plate, of the stirring shaft and used for being connected with a driving motor; a first efficient spiral stirring paddle is arranged at the middle upper part of the stirring shaft in the stirring tank body, and a second efficient spiral stirring paddle and an anchor type stirring paddle are arranged at the lower part of the stirring shaft in the stirring tank body; the upper half part of the anchor type stirring paddle is of a rectangular structure, and the second efficient spiral stirring paddle is arranged in the rectangular structure; and the lower half part of the anchor type stirring paddle is of an arc-shaped structure and is matched with the bottom of the stirring tank body in shape. Slurry is stirred and dispersed through synchronous rotation of the driving motor and the stirring paddles, the contact area of the slurry and the stirring blades is greatly increased through combined use of the stirring paddles, and the stirring efficiency of the slurry is improved.

Description

Technical Field

[0001] The utility model relates to a stirrer, in particular to a high-efficiency stirrer specifically used for sodium iron phosphate slurry. Background Art

[0002] Sodium iron phosphate composite (Na4Fe3(PO4)2P2O7) is a new type of sodium-ion battery electrode material, which has the advantages of low price, green and pollution-free, non-toxic, and good long cycle life. Currently, sodium iron phosphate composite has problems such as low tap density and high resistivity, which often hinder its practical application. Therefore, when applying sodium iron phosphate composite, other auxiliary materials need to be added to make up for its deficiencies.

[0003] In order to obtain sodium iron phosphate composite slurry with excellent performance, the solid powder of sodium iron phosphate composite, solvent, additives, etc. need to be mixed and fully stirred by a stirrer. To achieve this goal, the stirrer needs to have a strong shear force.

[0004] Currently, in the production process of sodium iron phosphate composite, the stirrers used are all stirrers developed in cooperation with lithium iron phosphate materials. When applied to the positive electrode material of sodium iron phosphate composite, they usually have the following disadvantages: low mixing efficiency leads to long stirring time, inability to adapt to the production rhythm of downstream processes, high energy consumption, poor mixing effect, easy sedimentation at the bottom, and high maintenance cost. The utility model patent application with the publication number CN218393234U and the name "A high-efficiency stirrer applied to lithium iron phosphate slurry" discloses a stirrer, but there are still problems such as no vacuum device, too small stirring paddle blades, low efficiency of the bottom anchor type stirring, and inability to disperse agglomerated materials. Therefore, in view of the above current situation, there is an urgent need to develop a high-efficiency stirrer applied to sodium iron phosphate composite slurry to overcome the deficiencies of the current applications. Summary of the Utility Model

[0005] To solve the above problems, the present utility model provides an efficient stirrer applicable to sodium iron phosphate slurry, specifically: an efficient stirrer applied to composite sodium iron phosphate slurry, comprising: a top cover plate and a stirring tank body; the top cover plate is provided with a vacuum valve and a feed inlet; the bottom of the stirring tank body is provided with a discharge outlet; a stirring shaft is longitudinally installed at the central position inside the stirring tank body, and one end of the stirring shaft extending out of the top cover plate is provided with a driving motor quick interface for connecting a driving motor; a first high-efficiency spiral stirring paddle is arranged in the upper middle part of the stirring shaft inside the stirring tank body, and a second high-efficiency spiral stirring paddle and an anchor-type stirring paddle are arranged in the lower part; the upper half of the anchor-type stirring paddle is of a rectangular structure, and the second high-efficiency spiral stirring paddle is arranged inside the rectangular structure; the lower half of the anchor-type stirring paddle is of an arc structure, which is adapted to the shape of the bottom of the stirring tank body; the driving motor drives the stirring shaft to drive the first high-efficiency spiral stirring paddle, the second high-efficiency spiral stirring paddle and the anchor-type stirring paddle to rotate synchronously at a high speed.

[0006] Preferably, a number of rows of tapered openings are welded on the blades of the first high-efficiency spiral stirring paddle, the second high-efficiency spiral stirring paddle and the anchor-type stirring paddle, and the tapered openings are used to enhance the shearing force of the blades and reduce the bubbles generated when stirring the slurry.

[0007] Preferably, the welding angle between the tapered opening and the blade surface of the paddle is 30° to 150°.

[0008] Preferably, when the welding angle between the tapered opening and the blade surface of the paddle is 85°, the paddle obtains the best shearing force.

[0009] Preferably, the blades of the first high-efficiency spiral stirring paddle and the second high-efficiency spiral stirring paddle are wide and twisted arc-shaped blades at the front end, which are used to improve the shearing force.

[0010] The beneficial effects of the present utility model are as follows: 1) The stirring and dispersion of the slurry are realized by driving the synchronous rotation of the stirring shaft, the first high-efficiency spiral stirring paddle, the second high-efficiency spiral stirring paddle and the anchor-type stirring paddle by the driving motor. By the combined use of the above three stirring paddles, the contact area between the slurry and the stirring blades is greatly increased, the stirring efficiency of the slurry is improved, and the stirring time is greatly reduced; 2) The combined blades of the second high-efficiency spiral stirring paddle and the anchor-type stirring paddle effectively avoid the problem that the bottom material cannot be stirred, and the intermediate combined spiral blades effectively solve the problem that the shearing force of the anchor-type stirring paddle is weak, and enhance the stirring efficiency of the stirrer. 3) By performing fish-scale welding of tapered openings on the stirring blades and adjusting the welding angle, the shearing force of the stirring tank can be further improved, and at the same time, the generation of slurry bubbles during stirring is reduced. Description of the Drawings

[0011] The accompanying drawings described herein are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model.

[0012] Figure 1A It is a three-dimensional structural schematic diagram of the high-efficiency stirrer of the present utility model;

[0013] Figure 1B It is a top-view structural schematic diagram of the high-efficiency stirrer of the present utility model;

[0014] Figure 1C It is a sectional structural schematic diagram taken along the A-A plane in Figure 1B ;

[0015] Figure 1D It is a plane structural schematic diagram in accordance with Figure 1C ;

[0016] Figure 2A It is a plane structural schematic diagram of the paddle blade;

[0017] Figure 2B It is a side structural schematic diagram of the paddle blade;

[0018] Figure 2C It is an end-face angle structural schematic diagram of the paddle blade;

[0019] Figure 2D It is a three-dimensional structural schematic diagram of the paddle blade. Specific embodiments

[0020] In order to more clearly explain the overall concept of the present application, the following will be described in detail by way of examples in conjunction with the drawings of the specification.

[0021] As Figure 1A shown, the high-efficiency stirrer 100 of the present utility model for sodium iron phosphate is a tank structure, including a top cover plate 1 and a stirring tank body 2. The stirring tank body 2 is the main body of the high-efficiency stirrer 100; a vacuum valve 3 and a feed port 5 are provided on the top cover plate 1.

[0022] As Figure 1B shown, a hole 17 is left in the middle of the top cover plate 1 for the upper end of the stirring shaft to extend out and connect to a driving motor (the driving motor is implicitly disclosed and not shown).

[0023] As Figure 1CAs shown in the figure, a stirring shaft 5 is longitudinally installed at the central position inside the stirring tank body 2. One end of the stirring shaft 5 extending out of the top cover plate 1 is provided with a driving motor quick interface 12 for connecting a driving motor. The stirring shaft 5 is provided with a first high-efficiency spiral stirring paddle 6 in the upper middle part inside the stirring tank body 2, a second high-efficiency spiral stirring paddle 8 and an anchor-shaped stirring paddle 7 in the lower part. A discharge port 9 is arranged at the bottom of the stirring tank body 2. Four gravity sensors 11 are arranged outside the bottom of the stirring tank body 2 for real-time mass detection. At the same time, the connection between the stirring tank body 2 and the top cover plate 1 is fixed by a clamp. The vacuum valve 3 is attached with a pressure gauge to record the internal pressure of the stirring tank body 2 and is connected to a sensor to record the pressure, which is synchronized to the computer terminal. The discharge port 9 and the vacuum valve 3 are both designed with electric ball valves to control the flow of the fluid.

[0024] As Figure 1D shown, the upper half of the anchor-shaped stirring paddle 7 is a rectangular structure 21, and the second high-efficiency spiral stirring paddle 8 is arranged inside the rectangular structure 21; the lower half of the anchor-shaped stirring paddle 7 is an arc-shaped structure 22, which is adapted to the shape of the bottom of the stirring tank body 2; the driving motor drives the stirring shaft 5 to drive the first high-efficiency spiral stirring paddle 6, the second high-efficiency spiral stirring paddle 8 and the anchor-shaped stirring paddle 7 to rotate synchronously and at high speed inside the stirring tank body 2. A number of rows of conical openings are welded on the blades of the first high-efficiency spiral stirring paddle 6, the second high-efficiency spiral stirring paddle and the anchor-shaped stirring paddle. The conical openings are used to enhance the shearing force of the blades and reduce the bubbles generated when stirring the slurry.

[0025] As Figure 2A 、 2B shown, it is the plane structure of the blade 13 of the first high-efficiency spiral stirring paddle 6 and the second high-efficiency spiral stirring paddle 8. The left side is the end, and the right side is the root close to the stirring shaft 5. It can be seen that the blade 13 is a blade structure with a wide end. At the same time, a number of conical openings 14 in a fish scale shape are welded at the end of the blade 13. After welding the conical openings 14, the bubbles of the slurry can be effectively reduced and the shearing force of the blade 13 can be improved.

[0026] As Figure 2C 、 2D shown, the blade 13 is a twisted arc-shaped blade structure. The welding angle of the conical opening 14 and the stirring blade 13 can be set differently. The welding angle is the included angle between the plane of the welding joint of the conical opening 14 and the blade 13 facing the end. Different included angles can obtain stirring paddles with different shearing forces; the welding angle is 30° - 150°. When the welding angle is set at 30°, the stirring efficiency of the stirring tank is poor, but the bubbles in the slurry are the least. When the welding angle is 150°, the stirring efficiency of the stirring tank is the best, but the phenomenon of bubbles in the slurry is more serious, which is not conducive to the stirring and preparation of the slurry. When the welding angle is 85°, the shearing force of the stirring paddle is the best.

[0027] The above examples are only embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the scope of the claims of the present utility model.

Claims

1. A high-efficiency agitator used for composite sodium iron phosphate slurry, characterized in that: include: A top cover plate (1) and a stirring tank body (2); The top cover plate (1) is provided with a vacuum valve (3) and a feed port (4); the bottom of the stirring tank body (2) is provided with a discharge port (9); A stirring shaft (5) is also longitudinally installed at the central position inside the stirring tank body (2); one end of the stirring shaft (5) extending out of the top cover plate (1) is provided with a drive motor quick interface (12) for connecting the drive motor; The stirring shaft (5) is provided with a first high-efficiency spiral stirring paddle (6) at the upper part, and a second high-efficiency spiral stirring paddle (8) and an anchor stirring paddle (7) at the lower part; The upper half of the anchor-type stirring paddle (7) is a rectangular structure, and the second high-efficiency spiral stirring paddle (8) is arranged in the rectangular structure; the lower half of the anchor-type stirring paddle (7) is an arc-shaped structure, which is adapted to the bottom shape of the stirring tank body (2); The driving motor drives the stirring shaft (5) to drive the first high-efficiency spiral stirring paddle (6), the second high-efficiency spiral stirring paddle (8) and the anchor stirring paddle (7) to rotate synchronously at high speed; A plurality of rows of conical openings (14) are welded on the blades (13) of the first high-efficiency spiral stirring paddle (6), the second high-efficiency spiral stirring paddle (8) and the anchor stirring paddle (7), and the conical openings (14) are used to enhance the shear force of the blades (13) and reduce bubbles generated when stirring the slurry.

2. The high-efficiency agitator according to claim 1, characterized in that: The welding angle between the conical opening (14) and the blade surface of the blade (13) is 30° to 150°.

3. The high-efficiency agitator according to claim 2, characterized in that: When the welding angle between the conical opening (14) and the blade surface of the blade (13) is 85°, the blade (13) obtains an optimal shear force.

4. The high-efficiency agitator according to claim 1, characterized in that: The blades (13) of the first high-efficiency spiral stirring impeller (6) and the second high-efficiency spiral stirring impeller (8) are twisted arc-shaped blades with wide front ends, which are used to increase shear force.

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