Electrolytic manganese dioxide waste liquid recovery device

Abstract

The invention discloses an electrolytic manganese dioxide waste liquid recovery device, which comprises: a reaction tank, which comprises a tank body, a pH adjusting structure, an inflation structure, a heating plate and a liquid discharge structure; the PH adjusting structure comprises a PH sensor, a PH adjusting box and a first controller; the PH adjusting box comprises a box body, a switch valve and a floating ring; the inflation structure comprises an inflation pump, an inflation pipe and an inflation ball, the inflation ball is of a hollow ball body structure, and a plurality of air outlet holes are formed in the side wall of the inflation ball; the inflator pump is connected to the side wall of the pool body; one end of the inflating tube is connected with the inflating pump, and the other end is connected with the inflating ball; the heating plate is connected to the lower part of the pool body; the first end of the water pumping pipe is connected to the bottom of the pool body, and the second end of the water pumping pipe is connected to the water suction pump; the recycling pool is connected to a water outlet of the water suction pump through a recycling pipe. The electrolytic manganese dioxide waste liquid recovery device is simple in structure, and the equipment cost is lower than that of cooperation of various traditional equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of battery material recovery, and more specifically, to a device for recovering electrolytic manganese dioxide waste liquid. Background Art

[0002] As a key inorganic chemical raw material, electrolytic manganese dioxide occupies a pivotal position in the field of battery manufacturing, especially in the production of alkaline batteries, zinc-manganese batteries and some lithium-ion batteries, it is an indispensable positive electrode active material. With the popularization of electronic devices around the world, the booming new energy vehicle industry and the continuous growth of energy storage demand, the market demand for electrolytic manganese dioxide has shown a steady upward trend, making the large-scale production of electrolytic manganese dioxide an important sector in the chemical industry.

[0003] In the production process of electrolytic manganese dioxide, in order to meet the stringent requirements of downstream applications such as high-performance batteries for product purity, it is usually necessary to perform multiple fine washing operations on the initially prepared manganese dioxide. This process aims to remove various impurities mixed on the surface and pores of manganese dioxide particles, such as residual electrolyte components, unreacted raw material impurities, and fine particle pollutants introduced during the production process. However, each washing step will inevitably cause a certain proportion of manganese dioxide material loss. Since these lost manganese dioxide are dispersed in the washing waste liquid in the form of tiny particles or dissolved states, if there is a lack of effective recovery measures, they will be directly discharged with the waste liquid.

[0004] The existing method of recycling electrolytic manganese dioxide waste liquid is mainly to add a large amount of chemical agents, and then go through chemical reactions and then go through steps such as impurity removal, extraction, precipitation, etc. to obtain lithium compounds for recycling. However, such a recycling method not only requires the coordination of various devices, but also has low recycling efficiency and high recycling costs.

[0005] Therefore, there is an urgent need for an electrolytic manganese dioxide waste liquid recovery device that can improve the recovery efficiency of electrolytic manganese dioxide waste liquid and reduce the recovery cost. Summary of the invention

[0006] The present invention provides an electrolytic manganese dioxide waste liquid recovery device, which is particularly suitable for the recovery and utilization of electrolytic manganese dioxide production waste liquid, can efficiently recover and utilize manganese ions in the waste liquid, and promote the development of the new energy field.

[0007] In order to achieve these purposes and other advantages according to the present invention, a device for recovering electrolytic manganese dioxide waste liquid is provided, comprising: a reaction tank and a recovery tank.

[0008] The reaction tank comprises a tank body, a pH regulating structure, an inflation structure, a heating plate and a drainage structure.

[0009] The cell body has space for accommodating a pH adjustment structure, an inflation structure, a heating plate and waste liquid.

[0010] The pH adjustment structure includes a pH sensor, a pH adjustment box and a first controller; the pH adjustment box includes a box body, a switch valve and a floating ring; the box body is a space for accommodating acidic powder and alkaline powder, and the box body is divided into an acidic powder room and an alkaline powder room by a partition, and the bottoms of the acidic powder room and the alkaline powder room are respectively provided with openings, and the two openings are respectively connected to the switch valve; the floating ring is connected to the outer side wall of the box body; the pH sensor is connected to the outer wall of the pool body and the probe of the pH sensor is connected to the outer side wall of the bottom of the box body; the first controller is respectively connected to the pH sensor and the switch valve.

[0011] The inflatable structure includes an inflatable pump, an inflatable tube and an inflatable ball. The inflatable ball is a hollow spherical structure, and a plurality of air outlet holes are opened on the side wall of the inflatable ball. The inflatable pump is connected to the side wall of the pool body. One end of the inflatable tube is connected to the inflatable pump, and the other end is connected to the inflatable ball.

[0012] A heating plate is connected to the lower part of the cell body.

[0013] The drainage structure comprises a water pump and a water pump pipe, wherein a first end of the water pump pipe is connected to the bottom of the pool body, and a second end of the water pump pipe is connected to the water pump.

[0014] The recovery tank has a space for accommodating the recovery liquid, and the recovery tank is connected to the water outlet of the water pump through a recovery pipe.

[0015] In the above scheme, the electrolytic manganese dioxide waste liquid recovery device of the present invention receives the manganese dioxide waste liquid through the cell body, and then adjusts the pH value of the manganese dioxide waste liquid through the pH adjustment structure, and simultaneously aerates the manganese dioxide waste liquid to promote the efficient reaction of manganese dioxide, and recovers the manganese dioxide in the manganese dioxide waste liquid.

[0016] Secondly, the electrolytic manganese dioxide waste liquid recovery device of the present invention can also realize the recycling of water bodies and reduce the waste of water resources after treating the manganese dioxide waste liquid.

[0017] In addition, the electrolytic manganese dioxide waste liquid recovery device of the present invention has a simple structure and the equipment cost is lower than that of the traditional combination of multiple equipments.

[0018] Preferably, the side wall of the pH regulating box protrudes from the bottom surface, and the switch valve is at least 8 cm away from the bottom end of the side wall.

[0019] In the above scheme, the switch valve is located at a certain distance from the bottom of the side wall. When in use, the pH adjustment box floats on the liquid surface of the manganese dioxide waste liquid, and acidic powder or alkaline powder is added according to the pH of the manganese dioxide waste liquid. At this time, since the switch valve is at a certain distance from the liquid surface, it is possible to avoid the waste liquid entering the acidic powder room and the alkaline powder room through the switch valve when the acidic powder and the alkaline powder are added, thereby avoiding the waste of acidic powder and alkaline powder.

[0020] Preferably, the bottom of the inflatable ball is provided with supporting feet.

[0021] In the above scheme, supporting feet are provided at the bottom of the inflatable ball to facilitate placing the inflatable ball at the bottom of the pool body, and a certain distance is maintained between the bottom surface of the inflatable ball and the bottom surface of the pool body, so that the inflation holes can have a certain distance from the inner wall to ensure that the gas is discharged smoothly into the pool body.

[0022] Preferably, the inner wall of the pool body is provided with a heat-insulating layer.

[0023] In the above scheme, the heat loss is reduced by providing a thermal insulation layer.

[0024] Preferably, the drainage structure also includes a filter tube, which includes a tube body and a filter plate, wherein the first end of the tube body is connected to the bottom of the pool body, and the second end of the tube body is connected to the pumping pipe; the filter plate is connected to the middle of the tube body.

[0025] In the above scheme, a filter tube is provided to filter the manganese dioxide after the reaction, so that the manganese dioxide and the liquid are separated and recycled, thereby improving the utilization rate of the manganese dioxide waste liquid.

[0026] Preferably, it further comprises a temperature sensor and a second controller, wherein the temperature sensor is connected to the inner wall of the pool body, and the second controller is connected to the temperature sensor and the heating plate respectively.

[0027] In the above scheme, a temperature sensor is provided to monitor the temperature of the manganese dioxide waste liquid in the cell in real time, so that the heating plate is turned on or off according to the actual problem to ensure that the reaction process is in a suitable temperature condition.

[0028] Preferably, two arc-shaped clamping strips are provided at the bottom of the pool body, a space for accommodating the filter tube is provided between the two clamping strips, and the filter tube can only move along the two ends of the clamping strips.

[0029] In the above scheme, a clamping strip is provided to clamp the filter tube, so that the position of the filter tube can be limited. At the same time, since the filter tube and the pumping pipe are connected, the position of the pumping pipe can also be limited to a certain extent, thereby avoiding the pumping pipe and the filter tube from shaking due to the force of the pump during the drainage process, which affects the drainage efficiency.

[0030] The present invention has at least the following beneficial effects: First, the electrolytic manganese dioxide waste liquid recovery device of the present invention receives the manganese dioxide waste liquid through the cell body, adjusts the pH value of the manganese dioxide waste liquid through the pH adjustment structure, and simultaneously aerates the manganese dioxide waste liquid to promote the efficient reaction of manganese dioxide, thereby recovering the manganese dioxide in the manganese dioxide waste liquid.

[0031] Secondly, the electrolytic manganese dioxide waste liquid recovery device of the present invention can also realize the recycling of water bodies and reduce the waste of water resources after treating the manganese dioxide waste liquid.

[0032] Third, the electrolytic manganese dioxide waste liquid recovery device of the present invention has a simple structure and lower equipment cost than the traditional combination of multiple equipment.

[0033] Fourth, the position of the switch valve in the electrolytic manganese dioxide waste liquid recovery device of the present invention is a certain distance away from the bottom of the side wall. When in use, the pH adjustment box floats on the liquid surface of the manganese dioxide waste liquid, and acidic powder or alkaline powder is added according to the pH value of the manganese dioxide waste liquid. At this time, since the switch valve is a certain distance away from the liquid surface, it is possible to avoid the waste liquid entering the acidic powder room and the alkaline powder room through the switch valve when the acidic powder and the alkaline powder are added, thereby avoiding the waste of acidic powder and alkaline powder.

[0034] Fifth, in the electrolytic manganese dioxide waste liquid recovery device of the present invention, supporting feet are provided at the bottom of the inflatable ball to facilitate placing the inflatable ball at the bottom of the pool body, and a certain distance is maintained between the bottom surface of the inflatable ball and the bottom surface of the pool body, so that the inflation holes can have a certain distance from the inner wall to ensure that the gas is discharged smoothly into the pool body.

[0035] Sixth, in the electrolytic manganese dioxide waste liquid recovery device of the present invention, a filter tube is provided to filter the manganese dioxide after the reaction, so that the manganese dioxide and the liquid are separated for recycling, thereby improving the utilization rate of the manganese dioxide waste liquid.

[0036] Seventh, in the electrolytic manganese dioxide waste liquid recovery device of the present invention, a temperature sensor is provided to monitor the temperature of the manganese dioxide waste liquid in the cell body in real time, so as to turn on or off the heating plate according to actual problems to ensure that the reaction process can be maintained at a suitable temperature condition.

[0037] Eighth, in the electrolytic manganese dioxide waste liquid recovery device of the present invention, a clamping strip is provided to clamp the filter tube, so that the position of the filter tube can be limited. At the same time, since the filter tube is connected to the water pumping pipe, the position of the water pumping pipe can also be limited to a certain extent, thereby avoiding the water pumping pipe and the filter tube from shaking due to the force of the water pump during the drainage process, thereby affecting the drainage efficiency.

[0038] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic diagram of the structure of the electrolytic manganese dioxide waste liquid recovery device of the present invention; Figure 2 It is a structural schematic diagram of a pH regulating box in the electrolytic manganese dioxide waste liquid recovery device of the present invention; Figure 3 Another structural schematic diagram of the electrolytic manganese dioxide waste liquid recovery device of the present invention; Figure 4 It is a schematic structural diagram of a filter tube in the electrolytic manganese dioxide waste liquid recovery device of the present invention; Figure 5 The present invention is a schematic structural diagram of the connection between the clamping strip and the filter tube in the electrolytic manganese dioxide waste liquid recovery device.

[0040] In the figure, the pool body 1, the PH adjustment structure 2, the PH sensor 21, the PH adjustment box 22, the box body 221, the switch valve 222, the floating ring 223, the inflation structure 3, the inflation pump 31, the inflation tube 32, the inflation ball 33, the support foot 331, the heating plate 4, the drainage structure 5, the water pump 51, the water pump 52, the recovery pool 6, the filter tube 7, the tube body 71, the filter plate 72, and the clamping strip 8. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below with reference to examples so that those skilled in the art can implement the invention with reference to the description.

[0042] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0043] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial channels unless otherwise specified.

[0044] <Example> Figure 1~Figure 2An implementation form of the present invention is shown, an electrolytic manganese dioxide waste liquid recovery device, comprising: a reaction tank and a recovery tank.

[0045] The reaction tank comprises a tank body 1, a pH adjustment structure 2, an inflation structure 3, a heating plate 4 and a drainage structure 5.

[0046] The cell body 1 has a space for accommodating a pH adjustment structure 2, an inflation structure 3, a heating plate 4 and waste liquid.

[0047] The pH adjustment structure 2 includes a pH sensor 21, a pH adjustment box 22 and a first controller; the pH adjustment box 22 includes a box body 221, a switch valve 222 and a floating ring 223; the box body 221 is a space for accommodating acidic powder and alkaline powder, and the box body 221 is divided into an acidic powder room and an alkaline powder room by a partition, and the bottoms of the acidic powder room and the alkaline powder room are respectively provided with openings, and the two openings are respectively connected to the switch valve 222; the floating ring 223 is connected to the outer side wall of the box body 221; the pH sensor 21 is connected to the outer wall of the pool body 1 and the probe of the pH sensor 21 is connected to the outer side wall of the bottom of the box body 221; the first controller is respectively connected to the pH sensor 21 and the switch valve 222.

[0048] The inflatable structure 3 includes an air pump 31, an air tube 32 and an inflatable ball 33. The inflatable ball 33 is a hollow spherical structure, and a plurality of air outlet holes are opened on the side wall of the inflatable ball 33. The air pump 31 is connected to the side wall of the pool body 1. One end of the air tube 32 is connected to the air pump 31, and the other end is connected to the inflatable ball 33.

[0049] A heating plate 4 is connected to the lower part of the tank body 1 .

[0050] The drainage structure 5 includes a water pump 51 and a water pumping pipe 52 . The first end of the water pumping pipe 52 is connected to the bottom of the pool body 1 , and the second end is connected to the water pump 51 .

[0051] The recovery tank 6 has a space for accommodating the recovery liquid, and the recovery tank 6 is connected to the water outlet of the water pump 51 through a recovery pipe.

[0052] The solution of this embodiment is specifically, before use, the initial temperature of the heating plate is set to 50~60℃, and the preset value of the pH sensor is 3.5~5.5; when in use, the waste liquid generated in the production process of electrolytic manganese dioxide is slowly injected into the tank body 1 of the reaction tank through a special waste liquid conveying pipeline, and the injection speed is controlled at 15~25 liters / minute; at the same time, the air pump is started, and the air flow rate of the air pump is controlled to be controlled at 0.5~1 cubic meter / hour to generate enough tiny bubbles, so that the waste liquid can obtain a better mixing effect when it flows into the reaction tank without causing violent agitation.

[0053] As the waste liquid is injected, the PH sensor monitors the PH value of the waste liquid in real time and transmits the data to the first controller. When the detected PH value is lower than the lower limit, the first controller immediately sends a command to open the switch valve at the bottom of the alkaline powder room. Under the action of gravity, the alkaline powder slowly falls into the waste liquid through the opening. The floating ring drives the box body to rise as the liquid level rises, ensuring that the powder is always added at the appropriate liquid level; at the same time, the first controller intelligently controls the opening and closing degree of the switch valve according to the rate of change and degree of deviation of the PH value, and accurately adjusts the amount of alkaline powder added to gradually return the PH value to the set range. When the detected PH value is higher than the upper limit, the first controller controls the switch valve between the acidic powders to open, and the acidic powder is added to the waste liquid until the PH value is adjusted to meet the standard. When the detected PH value deviates from the preset value and the PH is adjusted, the airflow rate of the air pump is adjusted to 1 ~ 2 cubic meters / hour.

[0054] After the pH value of the waste liquid stabilizes within the preset range, the heating plate 4 is started, and the waste liquid temperature is raised to the target reaction temperature at a rate of 0.5-1°C per minute according to the preset heating program, and the heating time is maintained at 1-2 hours. During the process of starting the heating reaction, the air flow rate of the inflation pump is adjusted to 1-3 cubic meters / hour.

[0055] After a predetermined heating reaction time, the air pump, heating plate and pH adjustment structure are turned off, and the water pump is started to extract the waste liquid after the reaction through the water pump pipe at a flow rate of 30-45 liters / minute, and transported to the recovery pool through the recovery pipe. In the recovery pool, the waste liquid is further allowed to settle. The relatively clear recovery liquid on the upper layer can be treated for a second time according to subsequent needs or directly used in other related process links. The solid impurities precipitated at the bottom are cleaned regularly and discharged through a special slag discharge port to ensure the effective volume of the recovery pool and the quality of the recovery liquid, so as to achieve efficient recovery and preliminary purification of electrolytic manganese dioxide waste liquid.

[0056] Furthermore, the side wall of the pH regulating box protrudes from the bottom surface, and the switch valve is at least 8 cm away from the bottom end of the side wall.

[0057] In the scheme of this embodiment, the switch valve is located at a certain distance from the bottom of the side wall. When in use, the pH adjustment box floats on the liquid surface of the manganese dioxide waste liquid, and acidic powder or alkaline powder is added according to the pH value of the manganese dioxide waste liquid. At this time, since the switch valve is at a certain distance from the liquid surface, it is possible to avoid the waste liquid entering the acidic powder room and the alkaline powder room through the switch valve when the acidic powder and the alkaline powder are added, thereby avoiding the waste liquid from entering the acidic powder room and the alkaline powder room through the switch valve, thereby avoiding the waste of acidic powder and alkaline powder.

[0058] Further, such as Figure 3 As shown, a supporting foot 331 is provided at the bottom of the inflatable ball 33 .

[0059] The solution of this embodiment is to provide support feet at the bottom of the inflatable ball to facilitate placing the inflatable ball at the bottom of the pool body, and to maintain a certain distance between the bottom surface of the inflatable ball and the bottom surface of the pool body, so that the inflation holes can have a certain distance from the inner wall to ensure that the gas is discharged smoothly into the pool body.

[0060] Furthermore, the inner wall of the cell body 1 is provided with a heat-insulating layer.

[0061] The solution of this embodiment reduces heat loss by providing a thermal insulation layer.

[0062] Further, such as Figure 4 As shown, the drainage structure 5 also includes a filter tube 7, which includes a tube body 71 and a filter plate 72. The first end of the tube body 71 is connected to the bottom of the pool body 1, and the second end of the tube body 71 is connected to the pumping pipe 52; the filter plate 72 is connected to the middle of the tube body 71.

[0063] The solution of this embodiment is to set a filter tube to filter the manganese dioxide after the reaction, so that the manganese dioxide and the liquid are separated for recycling, thereby improving the utilization rate of the manganese dioxide waste liquid.

[0064] Furthermore, it also includes a temperature sensor and a second controller. The temperature sensor is connected to the inner wall of the pool body 1, and the second controller is connected to the temperature sensor and the heating plate 4 respectively.

[0065] The solution of this embodiment is to set a temperature sensor to monitor the temperature of the manganese dioxide waste liquid in the cell in real time, so as to turn on or off the heating plate according to actual problems to ensure that the reaction process can be maintained at a suitable temperature condition.

[0066] Further, such as Figure 5 As shown, two arc-shaped clamping strips 8 are provided at the bottom of the pool body 1 , and there is a space between the two clamping strips 8 to accommodate the filter tube 7 , and the filter tube 7 can only move along the two ends of the clamping strips 8 .

[0067] The solution of this embodiment is to provide a clamping strip to clamp the filter tube, so that the position of the filter tube can be limited. At the same time, since the filter tube and the pumping pipe are connected, the position of the pumping pipe can also be limited to a certain extent, thereby avoiding the pumping pipe and the filter tube from shaking due to the force of the pump during the drainage process, which affects the drainage efficiency.

[0068] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the details shown and described herein.

Claims

1. An electrolytic manganese dioxide waste liquid recovery device, characterized in that: include: A reaction tank, comprising a tank body, a pH adjustment structure, an aeration structure, a heating plate and a drainage structure; The cell body has a space for accommodating a pH adjustment structure, an inflation structure, a heating plate and waste liquid; The pH regulating structure includes a pH sensor, a pH regulating box and a first controller; the pH regulating box includes a box body, a switch valve and a floating ring; the box body is a space for accommodating acidic powder and alkaline powder, and the box body is divided into an acidic powder room and an alkaline powder room by a partition, and the bottoms of the acidic powder room and the alkaline powder room are respectively provided with openings, and the two openings are respectively connected to the switch valve; the floating ring is connected to the outer side wall of the box body; the pH sensor is connected to the outer wall of the pool body and the probe of the pH sensor is connected to the outer side wall of the bottom of the box body; the first controller is respectively connected to the pH sensor and the switch valve; The inflatable structure includes an inflatable pump, an inflatable tube and an inflatable ball. The inflatable ball is a hollow spherical structure, and a plurality of air outlet holes are opened on the side wall of the inflatable ball. The inflatable pump is connected to the side wall of the pool body. One end of the inflatable tube is connected to the inflatable pump, and the other end is connected to the inflatable ball. A heating plate connected to the lower part of the cell body; The drainage structure comprises a water pump and a water pump pipe, wherein a first end of the water pump pipe is connected to the bottom of the pool body, and a second end of the water pump pipe is connected to the water pump; The recovery tank has a space for accommodating the recovery liquid, and the recovery tank is connected to the water outlet of the water pump through a recovery pipe.

2. The electrolytic manganese dioxide waste liquid recovery device according to claim 1, characterized in that: The side wall of the pH regulating box protrudes from the bottom surface, and the switch valve is at least 8 cm away from the bottom end of the side wall.

3. The electrolytic manganese dioxide waste liquid recovery device according to claim 1, characterized in that: The bottom of the inflatable ball is provided with supporting feet.

4. The electrolytic manganese dioxide waste liquid recovery device according to claim 1, characterized in that: The inner wall of the pool body is provided with a heat-insulating layer.

5. The electrolytic manganese dioxide waste liquid recovery device according to claim 1, characterized in that: The drainage structure also includes a filter tube, which includes a tube body and a filter plate. The first end of the tube body is connected to the bottom of the pool body, and the second end of the tube body is connected to the pumping pipe; the filter plate is connected to the middle of the tube body.

6. Also includes a temperature sensor and a second controller, wherein the temperature sensor is connected to the inner wall of the pool body, and the second controller is connected to the temperature sensor and the heating plate respectively.

7. The electrolytic manganese dioxide waste liquid recovery device according to claim 5, characterized in that: Two arc-shaped clamping strips are arranged at the bottom of the pool body, and a space for accommodating the filter tube is provided between the two clamping strips, and the filter tube can only move along the two ends of the clamping strips.

Images