Equipment for recycling nickel in waste nickel-metal hydride battery

Abstract

The utility model relates to the technical field of nickel recovery, in particular to equipment for recovering and circulating nickel in a waste nickel-metal hydride battery, which comprises a nickel-metal hydride battery cathode-anode material dissolving tank, the middle part in the nickel-metal hydride battery cathode-anode material dissolving tank is downwards communicated with an acid-alkali waste liquid neutralizing and collecting tank with a cone-like structure, a group of washing mechanisms are arranged above the middle part in the acid-alkali waste liquid neutralizing and collecting tank, and an acid leaching tank and an alkali leaching tank are symmetrically arranged at the top of the nickel-metal hydride battery cathode-anode material dissolving tank positioned on two sides of the washing mechanisms; a clamping assembly used for clamping the nickel-metal hydride battery cathode-anode material is installed at the bottom of the conveying plate through a connecting block, the clamping assembly automatically fixes the nickel-metal hydride battery cathode-anode material, and the nickel-metal hydride battery cathode-anode material is placed among the acid leaching tank, the washing mechanism and the alkaline leaching tank to be transferred through movement of the conveying plate. The nickel-metal hydride battery cathode-anode material is automatically moved and dissolved, and meanwhile, the acid-alkali waste liquid is used for automatic neutralization, so that the difficulty of subsequent waste liquid treatment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of nickel recovery, in particular to a nickel recovery and circulation device in waste nickel-hydrogen batteries. Background Art

[0002] The recovery and circulation of used nickel-metal hydride batteries is a key link, mainly to extract valuable metals such as nickel from these batteries to reduce the demand for new resources and reduce environmental pollution. The nickel recovery process usually includes the following steps: collection and pretreatment, chemical treatment, metal extraction, refining and reuse, and waste liquid treatment; recycling used nickel-metal hydride batteries not only helps to recycle resources, but also reduces the burden on the environment. In the above-mentioned processing links, chemical treatment generally involves chemical treatment of the anode and cathode materials of the battery, usually involving acid leaching or alkaline leaching. The purpose of this step is to dissolve nickel and other important metals from the electrode materials. The order of acid leaching and alkaline leaching needs to be determined according to the specific situation. Generally, the following steps are adopted: acid leaching, cleaning, alkaline leaching, cleaning or alkaline leaching, cleaning, acid leaching, cleaning; regardless of the above methods, the anode and cathode materials need to be cleaned during processing;

[0003] However, the existing treatment equipment mostly adopts separate flushing for cleaning after acid leaching and alkali leaching, and the generated alkaline waste liquid or acid waste liquid is in a separated state, resulting in the need for additional processes to treat the acid and alkali waste liquid, thereby increasing the cost of recycling;

[0004] Therefore, in view of the above-mentioned problems, the present technical solution proposes a nickel recovery and recycling device for waste nickel-hydrogen batteries. Utility Model Content

[0005] The utility model aims to provide a nickel recovery and circulation device for waste nickel-hydrogen batteries to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a nickel recovery and circulation device for waste nickel-hydrogen batteries, comprising a nickel-hydrogen battery cathode-anode material dissolution tank, an acid-base waste liquid neutralization collection tank, an acid leaching tank, and an alkali leaching tank; the nickel-hydrogen battery cathode-anode material dissolution tank is configured as a disc-shaped structure, the middle part of the nickel-hydrogen battery cathode-anode material dissolution tank is downwardly connected to the acid-base waste liquid neutralization collection tank with a cone-like structure, and a group of flushing mechanisms are arranged above the middle part of the acid-base waste liquid neutralization collection tank for cleaning the nickel-hydrogen battery cathode-anode material after acid leaching or alkali leaching, and the waste water generated by flushing directly falls into the acid-base waste liquid neutralization collection tank for storage, and when the acidic and alkaline waste liquids are simultaneously input into the acid-base waste liquid neutralization collection tank, the acid-base deviation is used for neutralization, thereby reducing the pollution and corrosiveness of the waste liquid, that is, reducing the subsequent Due to the difficulty of wastewater treatment, the top of the nickel-hydrogen battery cathode and anode material dissolution pool located on both sides of the flushing mechanism is symmetrically installed with an acid immersion tank and an alkaline immersion tank. The acid immersion tank soaks the nickel-hydrogen battery cathode and anode materials in acid washing liquid to remove oxides, rust or other pollutants on the metal surface. The alkaline immersion tank is used to remove grease, dirt or organic matter on the metal surface. A group of conveying plates are arranged directly above the acid immersion tank, the flushing mechanism and the alkaline immersion tank. A clamping assembly for clamping the nickel-hydrogen battery cathode and anode materials is installed at the bottom of the conveying plate through a connecting block. The clamping assembly automatically fixes the nickel-hydrogen battery cathode and anode materials, and then the nickel-hydrogen battery cathode and anode materials are transferred between the acid immersion tank, the flushing mechanism and the alkaline immersion tank under the moving conveyance of the conveying plate, and the nickel-hydrogen battery cathode and anode materials are automatically moved and dissolved.

[0007] Compared with the prior art, the utility model has the following beneficial effects: by arranging a spray row between the acid leaching tank and the alkaline leaching tank to automatically rinse the cathode-anode materials of the nickel-hydrogen battery, and then transferring the waste liquid to the acid-base waste liquid neutralization collection tank for automatic neutralization, the pollution degree of the waste liquid is reduced, which is beneficial to the subsequent treatment;

[0008] By setting a conveying plate, cooperating with a tightening mechanism box and a clamping component, it is convenient to automatically control the mobile dissolution treatment of the cathode and anode materials of the nickel-hydrogen battery, and fully improve the speed and efficiency of the treatment of the cathode and anode materials of the nickel-hydrogen battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 The figure is a three-dimensional structural diagram of a nickel recovery and recycling device for waste nickel-hydrogen batteries.

[0010] Figure 2 The diagram is a top view of the structure of a nickel recovery and recycling device for waste nickel-hydrogen batteries.

[0011] Figure 3 The present invention is a schematic diagram of the main structure of a nickel recovery and recycling device for waste nickel-hydrogen batteries.

[0012] Figure 4 The figure is a side view structural schematic diagram of a nickel recovery and recycling device for waste nickel-hydrogen batteries.

[0013] Figure 5 for Figure 4 A is a schematic diagram of the enlarged structure of the middle part;

[0014] Wherein: nickel-hydrogen battery cathode-anode material dissolution tank 10, acid-base waste liquid neutralization collection tank 11, conveying plate 12, connecting block 13, flushing liquid tank 14, fixing block 15, flushing liquid transmission ring pipe 16, flushing liquid delivery pipe 17, control valve 18, spray row 19, flushing hole 20, acid immersion tank 21, alkali immersion tank 22, rotating bottom plate 23, servo motor 24, output shaft 25, electric telescopic rod 26, tightening mechanism box 27, servo motor 28, lead screw 29, nut 30, clamping mesh plate 31. DETAILED DESCRIPTION

[0015] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0016] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0018] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0019] See also Figure 1-Figure 4 A nickel recovery and circulation device for waste nickel-hydrogen batteries comprises a nickel-hydrogen battery cathode-anode material dissolution tank 10, an acid-base waste liquid neutralization collection tank 11, an acid leaching tank 21, and an alkali leaching tank 22; the nickel-hydrogen battery cathode-anode material dissolution tank 10 is set as a disc-shaped structure, and the middle part of the nickel-hydrogen battery cathode-anode material dissolution tank 10 is downwardly connected to the acid-base waste liquid neutralization collection tank 11 with a cone-like structure, and a group of flushing mechanisms are arranged above the middle part of the acid-base waste liquid neutralization collection tank 11, which is used to clean the nickel-hydrogen battery cathode-anode material after acid leaching or alkali leaching, and the waste water generated by flushing directly falls into the acid-base waste liquid neutralization collection tank 11 for storage. When the acidic and alkaline waste liquids are simultaneously input into the acid-base waste liquid neutralization collection tank 11, the acid-base deviation is used for neutralization, thereby reducing the pollution and corrosiveness of the waste liquid, that is, reducing the difficulty of subsequent waste water treatment, and the flushing mechanism is located at the bottom of the flushing mechanism. Acid immersion tanks 21 and alkaline immersion tanks 22 are symmetrically installed on the top of the nickel-hydrogen battery cathode-anode material dissolution tanks 10 on both sides. The acid immersion tanks 21 soak the nickel-hydrogen battery cathode-anode materials in acid washing liquid to remove oxides, rust or other pollutants on the metal surface. The alkaline immersion tanks 22 are used to remove grease, dirt or organic matter on the metal surface. A group of conveying plates 12 are arranged directly above the acid immersion tanks 21, the flushing mechanism and the alkaline immersion tanks 22. A clamping assembly for clamping the nickel-hydrogen battery cathode-anode materials is installed at the bottom of the conveying plates 12 through the connecting blocks 13. The clamping assembly automatically fixes the nickel-hydrogen battery cathode-anode materials, and then the nickel-hydrogen battery cathode-anode materials are transferred between the acid immersion tanks 21, the flushing mechanism and the alkaline immersion tanks 22 under the moving conveyance of the conveying plates 12, and the nickel-hydrogen battery cathode-anode materials are automatically moved and dissolved.

[0020] In the embodiment of the present invention, commonly used alkaline liquids include sodium hydroxide (potassium hydroxide), ammonia water, etc.; acid immersion solutions include sulfuric acid, hydrochloric acid or nitric acid, etc.; wherein, the acid immersion tank 21 and the alkaline immersion tank 22 are placed on both sides of the flushing mechanism. Specifically, according to the requirements for immersion when the cathode and anode materials of the nickel-hydrogen battery are dissolved, a single acid (alkaline) immersion or both immersions can be performed, and the specific selection depends on the actual situation.

[0021] In one embodiment of the present invention, see Figure 5 A rotating bottom plate 23 is rotatably arranged at the bottom of the acid immersion tank 21 and the alkaline immersion tank 22. The rotation of the rotating bottom plate 23 drives the immersion liquid placed in the acid immersion tank 21 and the alkaline immersion tank 22 to flow, so as to fully contact and react the cathode and anode materials of the nickel-hydrogen battery in the immersion state. An output shaft 25 is connected to the middle of the bottom of the rotating bottom plate 23. The bottom end of the output shaft 25 is connected to a servo motor 24 fixed to the bottom of the acid immersion tank 21 or the alkaline immersion tank 22. The servo motor 24 is started to drive the output shaft 25 to control the rotation of the rotating bottom plate 23.

[0022] At the same time, a circle of equally spaced paddles is provided at the bottom of the rotating bottom plate 23, and the rotation of the rotating bottom plate 23 drives the paddles to drive the liquid to flow; a circle of sealing rings is provided between the circumferential side walls of the rotating bottom plate 23 and the inner walls of the acid immersion tank 21 and the alkali immersion tank 22, which is used to prevent the liquid on the upper side of the rotating bottom plate 23 from leaking to the lower side of the rotating bottom plate 23 and not affecting the normal rotation of the rotating bottom plate 23.

[0023] As a preferred embodiment of the present invention, the flushing mechanism includes a flushing liquid transmission loop pipe 16 of a circular structure arranged in the acid-base waste liquid and just above the collection tank 11, the flushing liquid transmission loop pipe 16 is connected to support rods at multiple locations on the inner side of the nickel-hydrogen battery cathode-anode material dissolution tank 10, and the ends of the support rods are connected to fixed blocks 15 fixed on the nickel-hydrogen battery cathode-anode material dissolution tank 10. A flushing liquid tank 14 is installed on the upper side of the nickel-hydrogen battery cathode-anode material dissolution tank 10 located between two groups of fixed blocks 15. The flushing liquid tank 14 is connected to the flushing liquid transmission loop pipe 16 through a connecting pipe, that is, under the transmission of the connecting pipe, the flushing liquid in the flushing liquid tank 14 is The flushing liquid in the flushing liquid tank 14 is transferred to the flushing liquid transfer ring tube 16, and at the same time, the inner wall of the flushing liquid transfer ring tube 16 is connected to a flushing liquid delivery pipe 17 in the direction toward the center of the flushing liquid transfer ring tube 16, and the end of the flushing liquid delivery pipe 17 is connected to a spray row 19 with an arc structure, and flushing holes 20 are evenly opened on the inside of the spray row 19. Under the transmission of the flushing liquid delivery pipe 17, the flushing liquid in the flushing liquid tank 14 is transferred to the spray row 19, and then the cathode-anode material of the nickel-hydrogen battery transferred to the middle position of the spray row 19 is flushed through the flushing holes 20. The waste liquid generated by the flushing falls into the acid-base waste liquid neutralization collection tank 11 under the action of gravity for storage and automatic treatment;

[0024] Specifically, a control valve 18 is provided on the flushing liquid delivery pipe 17, which is used to control the flushing liquid in the flushing liquid delivery ring pipe 16 to transfer to the flushing liquid delivery pipe 17, and a pump body is provided in the connecting pipe, which is used to drive the flushing liquid in the flushing liquid tank 14 to be pumped into the flushing liquid delivery ring pipe 16;

[0025] A moving channel is provided between adjacent spray rows 19 for transferring the cathode and anode materials of the nickel-hydrogen battery in the acid leaching tank 21 and the alkaline leaching tank 22 on both sides to the middle of the spray row 19 for flushing operation under the movement of the conveying plate 12 .

[0026] As a preferred embodiment of the present invention, refer to Figure 5The clamping assembly includes an electric telescopic rod 26 fixed at the bottom of the connecting block 13, and a tightening mechanism box 27 is installed at the output end of the electric telescopic rod 26. A tightening mechanism is arranged inside the tightening mechanism box 27. A slideway is provided on the lower side wall of the tightening mechanism box 27. The lower part of the tightening mechanism moves laterally along the slideway to automatically clamp or release the cathode and anode materials of the nickel-hydrogen battery, so that the materials can be transferred between the acid immersion tank 21, the flushing mechanism, and the alkaline immersion tank 22 in coordination with the lifting and lowering of the tightening mechanism box 27 and the movement of the conveying plate 12;

[0027] The tightening mechanism includes a servo motor 28 rotatably arranged inside the tightening mechanism box 27 on the upper side of the slide. One end of the lead screw 29 is connected to the servo motor 28, and the other end is rotatably connected to the inner wall of the tightening mechanism box 27. Two sets of nuts 30 are threadedly connected on both sides of the lead screw 29. The nuts 30 and the lead screw 29 adopt opposite tooth-slot threaded connection structures, that is, when the lead screw 29 rotates, it simultaneously drives the nuts 30 on both sides to move in opposite directions. The nuts 30 are provided with a guide device for limiting their rotation. A clamping mesh plate 31 is installed at the bottom of the nut 30 through the slide. The relative movement of the clamping mesh plates 31 on both sides is utilized to clamp and fix the cathode and anode materials of the nickel-hydrogen battery placed in the middle, thereby achieving the purpose of automatic fixation.

[0028] The working principle of the utility model is: in the idle position of the device, all the driving parts mentioned above, which refer to the power elements, electrical components and the adapted power supply, are connected through wires, and the electrical connection between the electrical components is completed in a sequential working order. The detailed connection means are well-known technologies in the art. The following mainly introduces the working principle and process, and does not explain the electrical control. When in use, the cathode and anode materials of the nickel-hydrogen battery after disassembling the waste nickel-hydrogen battery are selected according to their specific conditions. Acid immersion or alkaline immersion or only a single immersion treatment is selected. After determining the specific operation sequence, the cathode and anode materials of the nickel-hydrogen battery are clamped and fixed by the clamping mesh plate 31, and then on the conveying plate 12 Under the movement, the tightening mechanism box 27 is placed in the acid immersion tank 21 (alkaline immersion tank 22) for soaking and cleaning. Then, after the cleaning is completed, it is transferred to the spray row 19 under the movement of the conveying plate 12, and is rinsed using the flushing hole 20 on the spray row 19. After rinsing, according to the subsequent cleaning requirements, whether to use the alkaline immersion tank 22 (acid immersion tank 21) for soaking, if necessary, it is moved therein, and then after soaking, it is transferred to the spray row 19 for flushing again until the cleaning reaction of the cathode and anode materials of the nickel-hydrogen battery is completed, and then the waste liquid generated by the flushing in the spray row 19 is placed in the acid-base waste liquid neutralization and collection tank 11 for automatic neutralization, and then stored for subsequent output.

[0029] The above describes in detail the preferred implementation of this patent, but this patent is not limited to the above implementation. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A nickel recovery and recycling device for waste nickel-hydrogen batteries, characterized in that: The invention comprises a nickel-hydrogen battery cathode-anode material dissolution tank (10), an acid-base waste liquid neutralization collection tank (11), an acid leaching tank (21), and an alkaline leaching tank (22); the nickel-hydrogen battery cathode-anode material dissolution tank (10) is arranged as a disc-shaped structure; the middle part of the nickel-hydrogen battery cathode-anode material dissolution tank (10) is downwardly connected to the acid-base waste liquid neutralization collection tank (11) of a cone-shaped structure; a group of flushing mechanisms are arranged above the middle part of the acid-base waste liquid neutralization collection tank (11); the top of the nickel-hydrogen battery cathode-anode material dissolution tank (10) is symmetrically provided with an acid leaching tank (21) and an alkaline leaching tank (22) located on both sides of the flushing mechanism; a group of conveying plates (12) are arranged at a position directly above the acid leaching tank (21), the flushing mechanism, and the alkaline leaching tank (22); and a clamping assembly for clamping the nickel-hydrogen battery cathode-anode material is installed at the bottom of the conveying plate (12) through a connecting block (13).

2. The nickel recovery and recycling equipment for waste nickel-hydrogen batteries according to claim 1, characterized in that: A rotating bottom plate (23) is rotatably arranged at the bottom of the acid leaching tank (21) or the alkali leaching tank (22); an output shaft (25) is connected to the middle of the bottom of the rotating bottom plate (23); and a servo motor (24) fixed to the bottom of the acid leaching tank (21) or the alkali leaching tank (22) is connected to the bottom end of the output shaft (25).

3. The nickel recovery and recycling equipment for waste nickel-hydrogen batteries according to claim 2, characterized in that: The flushing mechanism comprises a flushing liquid transmission ring pipe (16) of a circular structure arranged in the acid-base waste liquid and just above the collection tank (11); the flushing liquid transmission ring pipe (16) is connected to support rods at multiple locations on the inner side of the nickel-hydrogen battery cathode-anode material dissolution tank (10); the ends of the support rods are connected to fixed blocks (15) fixed to the nickel-hydrogen battery cathode-anode material dissolution tank (10); a flushing liquid tank (14) is installed on the upper side of the nickel-hydrogen battery cathode-anode material dissolution tank (10) between two groups of fixed blocks (15); the flushing liquid tank (14) is connected to the flushing liquid transmission ring pipe (16) through a connecting pipe; the inner side wall of the flushing liquid transmission ring pipe (16) is connected to a flushing liquid delivery pipe (17) in a direction toward the center of the flushing liquid transmission ring pipe (16); the end of the flushing liquid delivery pipe (17) is connected to a spray row (19) of an arc structure; and flushing holes (20) are evenly arranged on the inner side of the spray row (19).

4. The nickel recovery and recycling equipment for waste nickel-hydrogen batteries according to claim 3, characterized in that: A moving channel is provided between adjacent spray rows (19).

5. The nickel recovery and recycling equipment for waste nickel-hydrogen batteries according to claim 4, characterized in that: The clamping assembly comprises an electric telescopic rod (26) fixed at the bottom of the connecting block (13); a tightening mechanism box (27) is installed at the output end of the electric telescopic rod (26); a tightening mechanism is arranged inside the tightening mechanism box (27); a slideway is provided on the lower side wall of the tightening mechanism box (27); and the lower part of the tightening mechanism moves laterally along the slideway.

6. The nickel recovery and recycling equipment for waste nickel-hydrogen batteries according to claim 5, characterized in that: The tightening mechanism comprises a servo motor (28) rotatably arranged inside a tightening mechanism box (27) on the upper side of a slideway, one end of a lead screw (29) is connected to the servo motor (28), and the other end is rotatably connected to the inner wall of the tightening mechanism box (27), two groups of nuts (30) are threadedly connected on both sides of the lead screw (29), and an opposite tooth groove thread connection structure is adopted between the nut (30) and the lead screw (29), a guide device for limiting its rotation is arranged on the nut (30), and a clamping mesh plate (31) is installed at the bottom of the nut (30) through the slideway.

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