Reaction kettle for recycling waste positive plates of lithium iron phosphate batteries

Abstract

The utility model relates to the technical field of lithium iron phosphate waste positive electrode material recycling, in particular to a lithium iron phosphate battery waste positive electrode plate recycling reaction kettle which comprises a reaction kettle body, a stirring mechanism is installed on the top of the reaction kettle body, and a feeding pipe is installed on the inclined face of the top of a box body of the reaction kettle body. The reaction kettle comprises a reaction kettle body, three supporting columns are installed on the edge of the bottom of the reaction kettle body at equal intervals, a discharging pipe is installed in the center of the bottom of the reaction kettle body, and a plurality of through holes are formed in a flange plate at the bottom of the discharging pipe at equal intervals. The filter cartridge is mounted at the bottom of the reaction kettle, and soluble substances such as metaaluminate in a solution can be filtered in the filter cartridge by the filter screen when the reaction kettle is discharged, so that impurities are filtered in a filtering manner when the reaction kettle is discharged, the purity of the discharged solution is higher, impurity treatment is not required, and the recovery efficiency of the lithium iron phosphate positive plate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of recycling waste lithium iron phosphate positive electrode materials, in particular to a reaction kettle for recycling waste positive electrode sheets of lithium iron phosphate batteries. Background Art

[0002] In the recycling process of potassium iron phosphate battery positive plates, the reactor is an important equipment. The reactor can provide suitable reaction conditions, such as temperature, pressure and stirring speed, to ensure the smooth progress of the chemical reaction. In the process of recycling by wet method, it is necessary to dissolve aluminum foil in the reactor by alkali dissolution to obtain waste lithium iron phosphate. In the process of dissolving aluminum foil by alkali dissolution, aluminum foil will generate soluble substances such as aluminate after dissolving in the alkaline solution. These substances may be mixed with other impurities or precipitates and need to be filtered. However, the traditional reactor does not have a filtering function and needs to be filtered after all materials are unloaded, which is inefficient.

[0003] In summary, the utility model solves the existing problems by designing a reactor for recycling waste positive electrode sheets of lithium iron phosphate batteries. Utility Model Content

[0004] The utility model aims to provide a reaction kettle for recycling waste positive electrode sheets of lithium iron phosphate batteries to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A reactor for recycling waste positive plates of lithium iron phosphate batteries comprises a reactor, wherein a stirring mechanism is installed on the top of the reactor, a feeding pipe is installed on the inclined surface of the top of the reactor box, three supporting columns are installed at equal intervals at the bottom edge of the reactor, a feeding pipe is installed at the bottom center of the reactor, a plurality of through holes are opened at equal intervals on the bottom flange of the feeding pipe, a manual valve is installed on one side of the outer ring surface of the feeding pipe, a filter cartridge is installed at the bottom of the feeding pipe, a plurality of threaded holes are opened at equal intervals on the top flange of the filter cartridge, a glass window is embedded on the outer ring surface of the filter cartridge, a sleeve ring is installed at the bottom of the filter cartridge, a filter screen is clamped on the inner side wall of the filter cartridge, and a discharge pipe is connected to the outer ring surface of the sleeve ring.

[0007] As a preferred solution of the utility model, the stirring mechanism includes a motor, a support frame, a rotating shaft, a bearing, a mechanical seal and a stirring rod, and the stirring rod is located inside the reaction kettle box.

[0008] As a preferred solution of the utility model, the top of the feed pipe is connected to the interior of the reactor, and the feed pipe and the reactor are welded. The flange on the feed pipe is threadedly connected to the flange threaded hole on the top of the filter cartridge by bolts passing through the through hole.

[0009] As a preferred solution of the present invention, the glass window is tempered glass, and the filter screen inside the filter cartridge can be observed from the outer side of the glass window.

[0010] As a preferred solution of the utility model, the filter screen is fixedly installed on the bottom of the inner wall of the filter cartridge, and the bottom of the filter screen is located on the inner side of the sleeve ring.

[0011] As a preferred solution of the utility model, one end of the discharge pipe is sleeved on the sleeve ring, and the discharge pipe is locked between the clamp and the outer ring surface of the sleeve ring, and the interior of the discharge pipe is connected to the interior of the sleeve ring.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. In the utility model, a reactor for recycling waste positive plates of lithium iron phosphate batteries is designed, and a filter cartridge is installed at the bottom of the reactor. When the reactor is discharged, soluble substances such as aluminate in the solution will be filtered by the filter net in the filter cartridge, so that impurities can be filtered out during discharge, so that the discharged solution has higher purity, and no impurity treatment is required, thereby improving the recovery efficiency of lithium iron phosphate positive plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the reactor of the utility model;

[0016] Figure 3 It is a schematic diagram of the enlarged structure of the filter cartridge and filter screen of the utility model.

[0017] In the figure: 1. Reactor; 2. Stirring mechanism; 3. Feeding pipe; 4. Support column; 5. Discharging pipe; 501. Through hole; 6. Manual valve; 7. Filter cartridge; 701. Threaded hole; 8. Glass window; 9. Socket ring; 10. Filter screen; 11. Discharging pipe. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0020] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0022] For examples, see Figure 1-3 , the utility model provides a technical solution:

[0023] A reactor for recycling waste positive plates of lithium iron phosphate batteries comprises a reactor 1, wherein a stirring mechanism 2 is installed on the top of the reactor 1, a feeding pipe 3 is installed on the inclined surface of the top of the box body of the reactor 1, three supporting columns 4 are installed at equal intervals at the bottom edge of the reactor 1, a feeding pipe 5 is installed at the bottom center of the reactor 1, a flange plate at the bottom of the feeding pipe 5 is provided with a plurality of through holes 501 at equal intervals, a manual valve 6 is installed on one side of the outer ring surface of the feeding pipe 5, a filter cartridge 7 is installed at the bottom of the feeding pipe 5, a plurality of threaded holes 701 are opened at equal intervals on the top flange plate of the filter cartridge 7, a glass window 8 is embedded on the outer ring surface of the filter cartridge 7, a sleeve ring 9 is installed at the bottom of the filter cartridge 7, a filter screen 10 is clamped on the inner side wall of the filter cartridge 7, and a discharge pipe 11 is connected to the outer ring surface of the sleeve ring 9.

[0024] For example, please refer to Figure 1 , Figure 2 and Figure 3 The top of the feed pipe 5 is connected to the interior of the reactor 1, and there is a welding structure between the feed pipe 5 and the reactor 1. The flange on the feed pipe 5 is threadedly connected to the flange threaded hole 701 on the top of the filter cartridge 7 by bolts passing through the through hole 501. The flanges on the feed pipe 5 and the filter cartridge 7 have the same size, and the feed pipe 5 and the filter cartridge 7 are sealed and connected through the flange.

[0025] For example, please refer to Figure 1 , Figure 2 and Figure 3 The glass window 8 is tempered glass, and the glass window 8 can observe the filter screen 10 inside the filter cartridge 7 from its outer side. The filter screen 10 is fixedly installed at the bottom of the inner wall of the filter cartridge 7, and the bottom of the filter screen 10 is located on the inner side of the sleeve ring 9. The inner side of the sleeve ring 9 is the same as the inner side of the filter cartridge 7, and the interior of the filter cartridge 7 is communicated with the interior of the feed pipe 5. One end of the discharge pipe 11 is sleeved on the sleeve ring 9, and the discharge pipe 11 is locked between the clamp and the outer ring surface of the sleeve ring 9, and the interior of the discharge pipe 11 is communicated with the interior of the sleeve ring 9.

[0026] The working process of the utility model: a reactor for recycling waste positive plates of lithium iron phosphate batteries designed by the present invention is used. When the aluminum foil in the lithium iron phosphate positive plate is dissolved by the alkaline dissolution method, the waste lithium iron phosphate positive plate material and the sodium hydroxide solution are first poured into the reactor 1 according to a suitable ratio. The high temperature and stirring of the reactor 1 allow the lithium iron phosphate positive plate and the sodium hydroxide to fully react, so that the lithium iron phosphate is decomposed to release valuable elements. However, the dissolution of the aluminum foil in the alkaline solution will produce soluble substances such as aluminate. When the valve is manually opened to discharge the material through the discharge pipe 5, the solution will enter the interior of the filter cylinder 7 through the discharge pipe 5. At this time, the solution will be filtered by the filter mesh 10 inside the filter cylinder 7 and then discharged through the discharge pipe 11, while the soluble substances such as aluminate in the solution are filtered on the filter mesh 10, so that the impurities are filtered out by filtering during the discharge, so that the discharged solution has a higher purity, and no impurity treatment is required, thereby improving the recovery efficiency of the lithium iron phosphate positive plate.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reactor for recycling waste positive electrode sheets of lithium iron phosphate batteries, comprising a reactor (1), characterized in that: The top of the reactor (1) is provided with a stirring mechanism (2); a feeding pipe (3) is provided on the inclined surface of the top of the housing of the reactor (1); three supporting columns (4) are provided at equal intervals on the bottom edge of the reactor (1); a feeding pipe (5) is provided at the center of the bottom of the reactor (1); a plurality of through holes (501) are provided at equal intervals on the bottom flange of the feeding pipe (5); a manual valve (6) is provided on one side of the outer ring surface of the feeding pipe (5); a filter cartridge (7) is provided at the bottom of the feeding pipe (5); a plurality of threaded holes (701) are provided at equal intervals on the top flange of the filter cartridge (7); a glass window (8) is embedded on the outer ring surface of the filter cartridge (7); a sleeve ring (9) is provided at the bottom of the filter cartridge (7); a filter screen (10) is clamped on the inner side wall of the filter cartridge (7); and a discharge pipe (11) is connected to the outer ring surface of the sleeve ring (9).

2. A reactor for recycling waste positive electrode sheets of lithium iron phosphate batteries according to claim 1, characterized in that: The stirring mechanism (2) comprises a motor, a support frame, a rotating shaft, a bearing, a mechanical seal and a stirring rod, and the stirring rod is located inside the box of the reaction kettle (1).

3. A reactor for recycling waste positive electrode sheets of lithium iron phosphate batteries according to claim 1, characterized in that: The top of the feed pipe (5) is connected to the interior of the reactor (1), and the feed pipe (5) and the reactor (1) are welded together. The flange on the feed pipe (5) is threadedly connected to the flange threaded hole (701) at the top of the filter cartridge (7) through bolts passing through the through hole (501).

4. A reactor for recycling waste positive electrode sheets of lithium iron phosphate batteries according to claim 1, characterized in that: The glass window (8) is tempered glass, and the filter screen (10) inside the filter cartridge (7) can be observed from the outer side of the glass window (8).

5. The reactor for recycling waste positive electrode sheets of lithium iron phosphate batteries according to claim 1, characterized in that: The filter screen (10) is fixedly mounted on the bottom of the inner wall of the filter cartridge (7), and the bottom of the filter screen (10) is located on the inner side of the sleeve ring (9).

6. The reactor for recycling waste positive electrode sheets of lithium iron phosphate batteries according to claim 1, characterized in that: One end of the discharge pipe (11) is sleeved on the sleeve ring (9), and the discharge pipe (11) is locked between the outer ring surface of the sleeve ring (9) through a clamp, and the interior of the discharge pipe (11) is communicated with the interior of the sleeve ring (9).

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