High efficient application device of PAM flocculant in wet disassembly of waste lead-acid battery

Abstract

The utility model relates to the high -efficient application device of PAM flocculating agent in wet method disassembly of waste lead -acid battery, including mixed cylinder and flocculating agent adding unit, mixed cylinder is connected in series on circulating water pipeline, and circulating water tangential flow enters mixed cylinder bottom, and after spirally flowing along mixed cylinder upwards, tangential flow is discharged from mixed cylinder top, a plurality of flocculating agent adding unit is arranged in the interval of mixed cylinder top and bottom, and it is convenient to realize multi -point feeding, and each flocculating agent adding unit includes the medicine storage jar that contains polyacrylamide solution, the connecting pipe with metering pump, the spray gun that communicates mixed cylinder and the compressed gas pipe that communicates compressed gas source and the turbidimeter for monitoring mixed cylinder liquid concentration, and the medicine storage jar is communicated with the spray gun through the connecting pipe, and the compressed gas pipe is communicated with the spray gun. It is convenient to realize that polyacrylamide solution sprays in atomized form. The utility model promotes that polyacrylamide solution distributes more evenly in circulating water, and the flocculation effect is enhanced significantly, and improves solid -liquid separation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of wet dismantling technology for waste lead-acid batteries, and in particular to a device for the efficient application of PAM flocculant in the wet dismantling of waste lead-acid batteries. Background Technology

[0002] In the wet dismantling process of waste lead-acid batteries, the treatment of lead paste circulating water is crucial. The lead paste circulating water system plays a core role in cleaning, separation, anti-clogging, and resource recovery during wet dismantling. The lead paste circulating water flows into the lead paste sedimentation tank. The circulating water contains acid and flocculants, which further concentrate the lead paste in the sedimentation tank, achieving better solid-liquid separation.

[0003] When adding flocculants: the existing flocculant and circulating water mixing device is not designed reasonably, the mixing effect is poor, and the flocculant is added in a single way, mostly at one point, which cannot ensure uniform distribution in the circulating water. The flocculant and circulating water do not react sufficiently, which affects the flocculation effect. As a result, when it flows into the lead paste sedimentation tank for use, the solid-liquid separation is incomplete, the purity of the lead product obtained from dismantling is affected, and the subsequent processing cost is also increased. Summary of the Invention

[0004] To address the problem of poor mixing effect between existing flocculants and circulating water, this invention provides a highly efficient application device for PAM flocculants in the wet dismantling of waste lead-acid batteries. A mixing cylinder is connected in series on the circulating water pipeline. The circulating water flows in a spiral shape as it passes through the mixing cylinder. During this process, multiple points are added into the mixing cylinder to achieve uniform distribution of the flocculant in the circulating water. The flocculant solution is sprayed out in an atomized form, thereby ensuring that the flocculant and circulating water are fully contacted and mixed, improving the flocculation effect.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A high-efficiency application device for PAM flocculant in wet dismantling of waste lead-acid batteries is installed on a circulating water pipeline. It includes a mixing cylinder and a flocculant dosing unit. The mixing cylinder is connected in series on the circulating water pipeline to facilitate the flow of circulating water into the mixing cylinder. The circulating water flows tangentially into the bottom of the mixing cylinder, flows upward along the mixing cylinder in a spiral shape, and then flows tangentially out from the top of the mixing cylinder. The mixing drum is equipped with multiple flocculant dosing units spaced at intervals to facilitate multi-point feeding. Each flocculant dosing unit includes a storage tank containing polyacrylamide solution, a connecting pipe with a metering pump, a spray gun connected to the mixing drum, a compressed air pipe connected to a compressed air source, and a turbidimeter for monitoring the liquid concentration in the mixing drum. The storage tank is connected to the spray gun via the connecting pipe, and the compressed air pipe is connected to the spray gun. This facilitates the atomization of the polyacrylamide solution.

[0006] Furthermore, the mixing cylinder is a cylindrical body with open top and bottom. Flange covers are bolted to both ends of the mixing cylinder, and the interior can be cleaned after the flange covers are removed. The upper and lower ends of the mixing cylinder are respectively connected to an outlet pipe and an inlet pipe, which facilitates the flow of liquid out and into the mixing cylinder. Both the outlet pipe and the inlet pipe are tangent to the mixing cylinder.

[0007] Furthermore, the mixing cylinder is provided with guide vanes, which are spiral-shaped to promote the spiral flow of circulating water within the mixing cylinder.

[0008] Furthermore, the pitch of the guide vanes gradually increases from the bottom to the top of the mixing cylinder, thus achieving different flow rates for the circulating water.

[0009] Furthermore, the bottom end of the guide vane is attached to the bottom of the mixing cylinder, while the top end of the guide vane is spaced from the top of the mixing cylinder. The flow of circulating water gradually slows down, protecting the growth and maturation of the filaments.

[0010] Furthermore, the two adjacent flocculant dosing units are staggered, and the water interfaces of the storage tank, metering pump, and spray gun are connected sequentially via connecting pipes. A flow control valve is also installed on the connecting pipe between the metering pump and the spray gun to facilitate control of the pumped flow rate of the polyacrylamide solution.

[0011] Furthermore, the air interface of the spray gun is connected to the compressed air source through a compressed air pipe, and the spray gun is set on the side wall of the mixing cylinder, with the spray gun tangential to the mixing cylinder.

[0012] Furthermore, the turbidity meter is also installed inside the mixing cylinder above the spray gun.

[0013] The beneficial effects of this utility model through the above technical solution are: This utility model features a rational structural design. By incorporating guide vanes within the mixing drum, the circulating water rises in a spiral pattern. Simultaneously, multiple flocculant dosing units are spaced along the flow direction of the circulating water to achieve multi-point feeding. Each flocculant dosing unit adds polyacrylamide solution to the mixing drum in an atomized form, which better promotes thorough contact and mixing between the two, effectively improving the flocculation effect of the lead paste circulating water, increasing solid-liquid separation efficiency, and enhancing the quality of the lead products obtained from dismantling. Attached Figure Description

[0014] Figure 1 This is a front view of the mixing cylinder of the high-efficiency application device of PAM flocculant in the wet dismantling of waste lead-acid batteries according to this utility model.

[0015] Figure 2 This is a schematic diagram of the flocculant dosing unit of the efficient PAM flocculant application device in the wet dismantling of waste lead-acid batteries according to this utility model.

[0016] Figure 3 This is a front view of the mixing cylinder in Embodiment 2 of the efficient application device of PAM flocculant in the wet dismantling of waste lead-acid batteries according to this utility model.

[0017] The attached diagram is labeled as follows: 1 mixing cylinder, 101 flange cover, 2 flocculant dosing unit, 3 outlet pipe, 4 inlet pipe, 5 guide vane, 6 storage tank, 7 metering pump, 8 connecting pipe, 9 spray gun, 10 compressed air pipe, 11 turbidity meter, 12 flow control valve, 13 air pressure regulating valve. Detailed Implementation

[0018] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings: Example 1: like Figures 1-2 As shown, a high-efficiency PAM flocculant application device is installed on the circulating water pipeline during the wet dismantling of waste lead-acid batteries. During the wet dismantling process, circulating water flows along the pipeline, passing through the high-efficiency PAM flocculant application device, which uniformly adds PAM flocculant into the circulating water.

[0019] The high-efficiency application device for PAM flocculant includes a mixing cylinder 1 and a flocculant dosing unit 2. The mixing cylinder 1 is an open-top and closed cylindrical body. Flange covers 101 are bolted to both ends of the mixing cylinder 1, allowing it to be sealed. During equipment maintenance, the flange covers 101 can be removed to clean the interior of the mixing cylinder 1. During installation, the mixing cylinder 1 is connected in series with a circulating water pipeline, allowing circulating water to flow through it. The flow pattern is as follows: the circulating water flows tangentially into the bottom of the mixing cylinder 1, spirals upwards along the cylinder, and then flows tangentially out from the top of the mixing cylinder 1.

[0020] Specifically, the mixing cylinder 1 is connected to an outlet pipe 3 and an inlet pipe 4 at its upper and lower ends, respectively, and both the outlet pipe 3 and the inlet pipe 4 are tangential to the mixing cylinder 1. In this way, circulating water flows tangentially into the mixing cylinder 1 through the inlet pipe 4 and flows tangentially out of the mixing cylinder 1 through the outlet pipe 3. Simultaneously, a guide vane 5 is installed inside the mixing cylinder 1. The guide vane 5 is a helical vane, thus the guide vane 5 is helical, which promotes the spiral flow of circulating water within the mixing cylinder 1.

[0021] Three flocculant dosing units 2 are arranged at intervals on the upper and lower sides of the mixing cylinder 1. The three flocculant dosing units 2 are arranged along the axial direction of the mixing cylinder 1, and two adjacent flocculant dosing units 2 are staggered on both sides of the mixing cylinder 1.

[0022] In this embodiment, each flocculant dosing unit 2 includes a storage tank 6 containing polyacrylamide solution, a connecting pipe 8 with a metering pump 7, a spray gun 9 connected to a mixing cylinder 1, a compressed air pipe 10 connected to a compressed air source, and a turbidimeter 11 for monitoring the liquid concentration inside the mixing cylinder 1. The turbidimeter 11 is installed inside the mixing cylinder 1 above the spray gun 9, and is mounted on the side wall of the mixing cylinder 1, extending into the interior of the mixing cylinder 1.

[0023] During installation, the spray gun 9 is positioned on the side wall of the mixing cylinder 1, with its outlet extending into the mixing cylinder 1. The outlet of the spray gun 9 is tangential to the mixing cylinder 1, meaning the spray direction of the spray gun 9 is designed to be tangential to the spiral flow direction of the liquid inside the mixing cylinder 1. This allows the polyacrylamide solution to enter the circulating water in the same direction. The spray gun 9 used here is a spray gun with independent air and liquid channels. The structure and principle of the spray gun 9 are existing technology and will not be elaborated upon here.

[0024] The storage tank 6 is connected to the spray gun 9 via a connecting pipe 8. In other words, the storage tank 6, the metering pump 7, and the water inlet of the spray gun 9 are sequentially connected via the connecting pipe 8. The operation of the metering pump 7 delivers the polyacrylamide solution from the storage tank 6 to the spray gun 9 through the connecting pipe 8. A flow control valve 12 is also installed on the connecting pipe 8 between the metering pump 7 and the spray gun 9 to regulate the flow rate of the polyacrylamide solution; a higher flow rate results in a larger spray volume from the spray gun 9.

[0025] The compressed air pipe 10 is connected to the spray gun 9, that is, the air interface of the spray gun 9 and the compressed air source are connected through the compressed air pipe 10. The compressed air source is provided by an air compressor, which can provide stable and dry compressed air. An air pressure regulating valve 13 is also provided on the compressed air pipe 10 to control the air pressure, thereby controlling the atomization fineness of the spray gun 9.

[0026] When the flocculant dosing unit 2 is in use: compressed air enters the spray gun 9 through the compressed air pipe 10, and simultaneously, the polyacrylamide solution also enters the spray gun 9 via pumping. Inside the spray gun 9, the high-speed flowing air and the polyacrylamide solution impact and shear each other, breaking it into extremely fine droplets before spraying it into the mixing cylinder 1. The atomization method can increase the mixing effect and at the same time reduce the intensity of the reaction between the circulating water and the polyacrylamide solution.

[0027] The principle of this invention is as follows: During the circulation process, the circulating water enters tangentially from the bottom of the mixing cylinder 1, and under the action of the guide vanes 5, forms a spiral upward water flow, eventually flowing out tangentially from the top of the mixing cylinder 1. During this process, three flocculant dosing units 2 are activated, and then the polyacrylamide solution is injected through spray guns 9 positioned at different heights on the mixing cylinder 1. The polyacrylamide solution, in an atomized form, fully contacts and mixes with the spirally rising circulating water. This achieves multi-point feeding, ensures uniform feeding, and also improves the mixing effect between the polyacrylamide solution and the circulating water.

[0028] In this embodiment, a PLC controller is also provided, and a flow sensor is installed on the circulating water pipeline to monitor the circulating water flow in real time. The monitoring signal of the flow sensor is fed back to the PLC controller, and the PLC controller controls the opening of the flow control valve 12. When the circulating water flow increases, the PLC controller automatically increases the opening of the flow control valve 12 to increase the amount of polyacrylamide solution injected.

[0029] The monitoring signal from turbidity meter 11 is also fed back to the PLC controller. When high turbidity is detected in the circulating water, the flow rate of polyacrylamide solution in the flocculant dosing unit 2 near the bottom of mixing drum 1 is appropriately increased to ensure sufficient reaction with the polyacrylamide solution in the initial stage of circulating water. Simultaneously, turbidity data at different locations in the circulating water is monitored in real time using turbidity sensors. Based on this data, the PLC controller dynamically adjusts the amount of polyacrylamide solution added to each flocculant dosing unit 2. For example, in areas with high turbidity, the dosage at the corresponding dosing point is increased; in areas with low turbidity, the dosage is appropriately reduced, achieving precise and efficient dosing of polyacrylamide solution throughout the entire circulating water system.

[0030] This invention proposes a mixing cylinder 1 and a multi-point dosing method, which makes the polyacrylamide solution more evenly distributed in the circulating water, significantly enhances the flocculation effect, improves the solid-liquid separation efficiency, and results in higher purity of the lead product obtained from dismantling. Simultaneously, the use of a PLC controller allows for control of the polyacrylamide solution dosage, reducing manual intervention and improving the stability and reliability of the production process.

[0031] It should be noted that after the polyacrylamide solution and circulating water come into contact and mix in the mixing tank 1, filaments will be generated. The circulating water will carry these filaments to the lead paste sedimentation tank, where they will adsorb the flocs in the tank and accelerate the formation of sediment.

[0032] Example 2: This embodiment is basically the same as Embodiment 1, and the similarities will not be repeated. The differences are as follows: Figure 3As shown, in order to optimize the product structure, the pitch of the guide vane 5 gradually increases from the bottom to the top of the mixing cylinder 1, and the bottom end of the guide vane 5 is in contact with the bottom of the mixing cylinder 1, while the top end of the guide vane 5 is separated from the top of the mixing cylinder 1. That is, the guide vane 5 is not set within a certain height range of the top of the mixing cylinder 1, but the flocculant dosing unit 2 is also set within this height range.

[0033] As a result, the smaller pitch at the bottom of the guide vane 5 results in a slightly longer spiral channel, allowing the circulating water to remain in this area for a longer time. This allows for more shearing and mixing cycles, ensuring that the polyacrylamide solution and circulating water are fully and evenly dispersed and in contact, achieving rapid mixing and reaction, which is beneficial for the formation of filaments. During the liquid's ascent, as the pitch increases, the spiral channel becomes shorter and straighter, increasing the upward speed and residence time of the circulating water, reducing shearing and disturbance, and lessening damage to the filaments. The area at the top of the mixing cylinder 1 without the guide vane 5 no longer disturbs the liquid, promoting a smoother upward and outflow, which is more beneficial for the filaments.

[0034] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A high-efficiency application device for PAM flocculant in the wet dismantling of waste lead-acid batteries, installed on a circulating water pipeline, characterized in that... It includes a mixing cylinder (1) and a flocculant dosing unit (2). The mixing cylinder (1) is connected in series with a circulating water pipe. The circulating water flows tangentially into the bottom of the mixing cylinder (1), flows upward along the mixing cylinder (1) in a spiral shape, and then flows tangentially out from the top of the mixing cylinder (1). The mixing cylinder (1) is provided with multiple flocculant dosing units (2) at intervals on the top and bottom. Each flocculant dosing unit (2) includes a storage tank (6) containing polyacrylamide solution, a connecting pipe (8) with a metering pump (7), a spray gun (9) connected to the mixing cylinder (1), a compressed air pipe (10) connected to a compressed air source, and a turbidimeter (11) for monitoring the liquid concentration in the mixing cylinder (1). The storage tank (6) is connected to the spray gun (9) through the connecting pipe (8), and the compressed air pipe (10) is connected to the spray gun (9).

2. The high-efficiency application device for PAM flocculant in the wet dismantling of waste lead-acid batteries according to claim 1, characterized in that, The mixing cylinder (1) is a cylindrical body with open top and bottom. The upper and lower ends of the mixing cylinder (1) are bolted with flange covers (101). The upper and lower ends of the mixing cylinder (1) are respectively connected to the liquid outlet pipe (3) and the liquid inlet pipe (4). The liquid outlet pipe (3) and the liquid inlet pipe (4) are tangent to the mixing cylinder (1).

3. The high-efficiency application device for PAM flocculant in the wet dismantling of waste lead-acid batteries according to claim 1, characterized in that, The mixing cylinder (1) is provided with guide vanes (5), which are spiral in shape to promote the spiral flow of circulating water in the mixing cylinder (1).

4. The high-efficiency application device for PAM flocculant in the wet dismantling of waste lead-acid batteries according to claim 3, characterized in that, The pitch of the guide vane (5) gradually increases from the bottom to the top of the mixing cylinder (1).

5. The high-efficiency application device for PAM flocculant in the wet dismantling of waste lead-acid batteries according to claim 4, characterized in that, The bottom end of the guide vane (5) is attached to the bottom of the mixing cylinder (1), and the top end of the guide vane (5) is spaced from the top end of the mixing cylinder (1).

6. The high-efficiency application device for PAM flocculant in the wet dismantling of waste lead-acid batteries according to claim 1, characterized in that, The two adjacent flocculant dosing units (2) are staggered. The water interfaces of the storage tank (6), metering pump (7) and spray gun (9) are connected in sequence through connecting pipe (8). A flow control valve (12) is also provided on the connecting pipe (8) between metering pump (7) and spray gun (9).

7. The high-efficiency application device for PAM flocculant in the wet dismantling of waste lead-acid batteries according to claim 6, characterized in that, The air interface of the spray gun (9) is connected to the compressed air source through a compressed air pipe (10). The spray gun (9) is set on the side wall of the mixing cylinder (1) and is tangential to the mixing cylinder (1).

8. The high-efficiency application device for PAM flocculant in the wet dismantling of waste lead-acid batteries according to claim 6, characterized in that, The turbidity meter (11) is also installed in the mixing cylinder (1) above the spray gun (9).

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