Device for composite electrodeposition of lead dioxide

Abstract

The utility model relates to a device for composite electrodeposition of lead dioxide, and belongs to the technical field of electrodeposition. The device comprises an electrolysis device unit, a low tank unit and a high tank unit, the electrolysis device unit comprises an electrolytic tank, a first isolating membrane is vertically arranged in the electrolytic tank, an electrolysis area and a lead nitrate plating solution circulating area are arranged on the two sides of the first isolating membrane respectively, a pneumatic stirring device is arranged at the bottom end of the first isolating membrane, and a bottom plate of the electrolysis area of the electrolytic tank is an inclined plate; two conductive copper bars are arranged at the top end of the electrolytic bath, the two conductive copper bars are externally connected with the positive electrode and the negative electrode of a rectifier respectively, an anode plate and a cathode plate are alternately inserted in an electrolysis area of the electrolytic bath, and two conductive heads on conductive beams at the top ends of the anode plate and the cathode plate are electrically connected with the rectifier through the two conductive copper bars respectively; the electrolytic bath lead nitrate plating solution circulating area is communicated with the lower tank unit, and the lower tank unit is communicated with the elevated tank unit through a circulating magnetic pump. The device enables the capacity and quality of composite electrodeposition lead dioxide to be stable and reliable, and is convenient to operate.

Description

Technical Field

[0001] The utility model relates to a device for composite electrodeposition of lead dioxide, belonging to the technical field of electrodeposition. Background Art

[0002] Currently, cast lead-(0.5-1%) silver alloys are widely used as inert anodes for nonferrous metal electrowinning due to their low cost and easy availability. However, the corrosiveness of the solution can strongly affect the lead alloy, leading to dissolution and inclusion of Pb impurities in the cathode product. Furthermore, the naturally formed oxide film is brittle and easily flaked, seriously impacting recycling production. Other electrodes, such as platinum electrodes, are too expensive, and graphite-based electrodes have poor corrosion resistance. These electrodes no longer meet the modern industrial demands for low consumption, high output, low investment, high returns, and environmentally friendly, pollution-free production. Therefore, the search for a new anode material with low cost, excellent corrosion resistance, strong catalytic activity, and environmental friendliness is urgent. Lead dioxide electrodes, due to their advantages such as high oxygen evolution overpotential, good corrosion resistance, good stability, strong oxidizing ability, good conductivity, and low cost, have important applications in electrochemical fields such as lead-acid batteries, electrochemical synthesis, and wastewater treatment of organic pollutants. Lead dioxide electrodes prepared by electrodeposition play an important role in new anode materials. Therefore, it is necessary to design a device for composite electrodeposition of lead dioxide with a high degree of automation to solve the problem of industrial production of electrodeposition. Utility Model Content

[0003] The utility model provides a device for composite electrodeposition of lead dioxide, which can save production manpower during the process of electrodeposition of lead dioxide and realize semi-automatic production of composite electrodeposition of lead dioxide.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A composite electrodeposition lead dioxide device comprises an electrolysis device unit, a low-level tank unit and a high-level tank unit.

[0006] The electrolysis device unit includes an electrolytic cell 1, which is filled with a conventional lead nitrate composite plating solution. A first isolation membrane 4 is vertically arranged in the electrolytic cell 1, and the two sides of the first isolation membrane 4 are respectively an electrolysis zone and a lead nitrate plating solution circulation zone. The bottom end of the first isolation membrane 4 is provided with a pneumatic stirring device 6, the bottom plate of the electrolysis zone of the electrolytic cell 1 is an inclined plate 5, and the upper and lower ends of the inclined plate 5 are respectively A end and B end, and the A end of the inclined plate 5 is located at the bottom end of the first isolation membrane 4. Two conductive copper bars 7 are provided at the top of the electrolytic cell 1, and the two conductive copper bars 7 are respectively fixedly arranged along the parallel two side walls and the two conductive copper bars 7 are respectively externally connected to the positive and negative poles of the rectifier 8. Anode plates 2 and cathode plates 3 are alternately inserted in the electrolysis zone of the electrolytic cell 1, and the anode plates 2 and cathode plates 3 are parallel to the first isolation membrane 4. The two conductive heads on the top conductive beams of the anode plates 2 and the cathode plates 3 are respectively electrically connected to the rectifier 8 through the two conductive copper bars 7;

[0007] Solid particles in the lead nitrate composite plating solution in the electrolysis zone of the electrolytic cell 1 cannot pass through the first isolation membrane 4 and are retained in the electrolysis zone. The liquid enters the lead nitrate composite plating solution circulation zone through the first isolation membrane 4. The solid particles in the lead nitrate composite plating solution in the electrolysis zone settle under the action of gravity. Since the bottom plate of the electrolysis zone of the electrolytic cell 1 is an inclined plate 5, the solid particles spontaneously gather at the bottom end of the first isolation membrane 4. Under the gas injection and stirring conditions of the pneumatic stirring device 6, the solid particles move upward and are dispersed in the lead nitrate composite plating solution, thereby achieving a circulating motion of the solid particles. At the same time, the kinetic energy of the moving solid particles increases, making them more susceptible to electrodeposition.

[0008] The lead nitrate plating solution circulation area of the electrolytic cell 1 is connected to the low-level tank unit, and the low-level tank unit is connected to the high-level tank unit through a circulating magnetic pump 13.

[0009] An acid mist exhaust device 9 is fixedly provided on the top of the electrolytic cell 1 to remove the acid mist generated by electrodeposition in a timely manner.

[0010] The top of the first isolation membrane 4 is a semipermeable membrane, and the bottom of the first isolation membrane 4 is an isolation plate; the semipermeable membrane is used to isolate solid particles and allow the plating solution to penetrate through; the isolation plate directly isolates the electrolysis area and the lead nitrate plating solution circulation area.

[0011] The height of the semipermeable membrane accounts for 1 / 4 to 1 / 2 of the total height of the first isolation membrane 4 , and the height of the isolation plate accounts for 1 / 2 to 3 / 4 of the total height of the first isolation membrane 4 .

[0012] The low-level tank unit includes a first low-level tank and a second low-level tank that are connected. A sieve plate 11 is vertically arranged in the first low-level tank, and the two sides of the sieve plate 11 are respectively the first cavity and the second cavity. The sieve plate 11 is used to further isolate the particles in the plating solution in the first cavity of the first low-level tank to achieve purification of the plating solution; the bottom of the first cavity of the first low-level tank and the bottom of the second low-level tank are both provided with a pneumatic stirring device 6 to stir the plating solutions of the first low-level tank and the second low-level tank to achieve temperature balance. The lead nitrate plating solution circulation area of the electrolytic cell 1 is connected to the first cavity of the first low-level tank through a first infusion pipe, and a first solenoid valve is provided on the first infusion pipe. The second low-level tank is connected to the second low-level tank through a second infusion pipe, and a second solenoid valve is provided on the second infusion pipe. The second low-level tank is connected to the high-level tank unit through a third infusion pipe, and a magnetic pump 13 is provided on the third infusion pipe.

[0013] Preferably, the side walls of the first low-level tank and the second low-level tank are both provided with heaters, the heaters are externally connected to a temperature control device 10, and the temperature control device 10 cooperates with the heaters to achieve temperature control of the plating solution in the first low-level tank and the second low-level tank.

[0014] The inlet end of the third liquid delivery pipe is provided with a filter device 12 to further isolate the solid particles remaining in the plating solution in the second low-level tank, thereby further purifying the plating solution.

[0015] The high-level tank unit is arranged on the bracket 16, and the high-level tank unit is provided with a liquid level controller 14. The discharge port of the high-level tank unit is connected to the electrolysis area of the electrolytic cell 1 through the fourth infusion pipe; when the liquid level controller 14 of the high-level tank unit reaches the preset limit value, the magnetic pump 13 stops running.

[0016] The fourth liquid delivery pipe is provided with a third electromagnetic valve 15 for regulating the rate of inflow of the plating solution.

[0017] The pneumatic stirring device, the first solenoid valve, the second solenoid valve, the third solenoid valve 15 and the magnetic pump 13 are all connected to an external controller.

[0018] The liquid level controller 14 is connected to an external controller.

[0019] The temperature control device 10 is externally connected to a controller.

[0020] Beneficial effects of the utility model:

[0021] (1) A pneumatic stirring device is provided at the bottom of the electrolytic cell of the utility model to realize the circulation movement of solid particles;

[0022] (2) The utility model can realize the industrialization of semi-automatic production of composite electrodeposited lead dioxide, is simple to operate, has a relatively large production volume, and produces a uniform deposition amount of composite electrodeposited lead dioxide with stable performance. The utility model can also be used for the semi-automatic production of other types of metal or alloy particle electrodeposition;

[0023] (3) The utility model can promptly remove the acid mist generated by electrodeposition by providing an acid mist exhaust device;

[0024] (4) The device of the utility model has a high utilization rate of lead dioxide deposition and reduces concentration polarization, which can increase the current efficiency from 80% to 90%. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the structure of the device for composite electrodeposition of lead dioxide;

[0026] Figure 2 Schematic diagram of the electrolysis unit structure;

[0027] Figure 3 It is a schematic diagram of the low-level tank unit structure;

[0028] Figure 4 This is a schematic diagram of the high-level tank unit structure;

[0029] In the figure, 1-electrolytic cell, 2-anode plate, 3-cathode plate, 4-first isolation membrane, 5-inclined plate, 6-pneumatic stirring device, 7-conductive copper busbar, 8-rectifier, 9-acid mist exhaust device, 10-temperature control device, 11-sieve plate, 12-filtering device, 13-magnetic pump, 14-liquid level controller, 15-third solenoid valve. DETAILED DESCRIPTION

[0030] Below, the technical solutions of the present invention will be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments of the present invention. It should be understood that the present invention is not limited to the example embodiments described here. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention, rather than all of them, are shown in the accompanying drawings.

[0031] Example 1: A device for composite electrodeposition of lead dioxide (see Figures 1-2 ), including an electrolysis unit, a low-level tank unit and an upper-level tank unit,

[0032] The electrolysis device unit includes an electrolytic cell 1, which is filled with a conventional lead nitrate composite plating solution. A first isolation membrane 4 is vertically arranged in the electrolytic cell 1, and the two sides of the first isolation membrane 4 are respectively an electrolysis zone and a lead nitrate plating solution circulation zone. The bottom end of the first isolation membrane 4 is provided with a pneumatic stirring device 6, the bottom plate of the electrolysis zone of the electrolytic cell 1 is an inclined plate 5, and the upper and lower ends of the inclined plate 5 are respectively A end and B end, and the A end of the inclined plate 5 is located at the bottom end of the first isolation membrane 4. Two conductive copper bars 7 are provided at the top of the electrolytic cell 1, and the two conductive copper bars 7 are respectively fixedly arranged along the parallel two side walls and the two conductive copper bars 7 are respectively externally connected to the positive and negative poles of the rectifier 8. Anode plates 2 and cathode plates 3 are alternately inserted in the electrolysis zone of the electrolytic cell 1, and the anode plates 2 and cathode plates 3 are parallel to the first isolation membrane 4. The two conductive heads on the top conductive beams of the anode plates 2 and the cathode plates 3 are respectively electrically connected to the rectifier 8 through the two conductive copper bars 7;

[0033] Solid particles in the lead nitrate composite plating solution in the electrolysis zone of the electrolytic cell 1 cannot pass through the first isolation membrane 4 and are retained in the electrolysis zone. The liquid enters the lead nitrate composite plating solution circulation zone through the first isolation membrane 4. The solid particles in the lead nitrate composite plating solution in the electrolysis zone settle under the action of gravity. Since the bottom plate of the electrolysis zone of the electrolytic cell 1 is an inclined plate 5, the solid particles spontaneously gather at the bottom end of the first isolation membrane 4. Under the gas injection and stirring conditions of the pneumatic stirring device 6, the solid particles move upward and are dispersed in the lead nitrate composite plating solution, thereby achieving a circulating motion of the solid particles. At the same time, the kinetic energy of the moving solid particles increases, making them more susceptible to electrodeposition.

[0034] The lead nitrate plating solution circulation area of the electrolytic cell 1 is connected to the low-level tank unit, and the low-level tank unit is connected to the high-level tank unit through a circulating magnetic pump 13;

[0035] An acid mist exhaust device 9 is fixedly provided at the top of the electrolytic cell 1 to remove the acid mist generated by electrodeposition in a timely manner;

[0036] The top of the first isolation membrane 4 is a semipermeable membrane, and the bottom of the first isolation membrane 4 is an isolation plate; the semipermeable membrane is used to isolate solid particles and allow the plating solution to penetrate through; the isolation plate directly isolates the electrolysis area and the lead nitrate plating solution circulation area; preferably, the height of the semipermeable membrane accounts for 1 / 4 to 1 / 2 of the total height of the first isolation membrane 4, and the height of the isolation plate accounts for 1 / 2 to 3 / 4 of the total height of the first isolation membrane 4.

[0037] Example 2: The apparatus for composite electrodeposition of lead dioxide in this example is substantially the same as that in Example 1, except that:

[0038] like Figure 3As shown, the low-level tank unit includes a first low-level tank and a second low-level tank that are connected. A sieve plate 11 is vertically arranged in the first low-level tank. The two sides of the sieve plate 11 are respectively the first cavity and the second cavity. The sieve plate 11 is used to further isolate the particles in the plating solution in the first cavity of the first low-level tank to purify the plating solution; the bottom of the first cavity of the first low-level tank and the bottom of the second low-level tank are both provided with a pneumatic stirring device 6 to stir the plating solutions of the first low-level tank and the second low-level tank to achieve temperature balance. The lead nitrate plating solution circulation area of the electrolytic cell 1 is connected to the first cavity of the first low-level tank through the first infusion pipe, and the electrolytic cell 1 is supplied with the lead nitrate plating solution through the first infusion pipe. The plating liquid in the lead nitrate plating liquid circulation zone is diverted into the first cavity of the first low-level tank. The first infusion pipe is provided with a first solenoid valve, and the flow rate of the plating liquid in the first infusion pipe is controlled by the first solenoid valve. The second low-level tank is connected to the second low-level tank through a second infusion pipe. The second infusion pipe is provided with a second solenoid valve, and the flow rate of the plating liquid in the second infusion pipe is controlled by the second solenoid valve to match the flow rate of the plating liquid flowing from the first infusion pipe into the first low-level tank. The second low-level tank is connected to the high-level tank unit through a third infusion pipe. The third infusion pipe is provided with a magnetic pump 13, and the plating liquid purified from the second low-level tank is pumped into the high-level tank unit through the magnetic pump 13;

[0039] The side walls of the first low-level tank and the second low-level tank are both provided with heaters, and the heaters are externally connected to a temperature control device 10, and the temperature control device 10 cooperates with the heaters to achieve temperature control of the plating solution in the first low-level tank and the second low-level tank;

[0040] The inlet end of the third liquid delivery pipe is provided with a filter device 12 to further isolate the solid particles remaining in the plating solution in the second low-level tank, thereby further purifying the plating solution.

[0041] Example 3: The apparatus for composite electrodeposition of lead dioxide in this example is substantially the same as that in Example 2, except that:

[0042] like Figure 4 As shown, the header tank unit is arranged on a bracket 16, and the header tank unit is provided with a liquid level controller 14. The discharge port of the header tank unit is connected to the electrolysis zone of the electrolytic cell 1 through a fourth liquid delivery pipe; when the liquid level controller 14 of the header tank unit reaches a preset limit value, the magnetic pump 13 stops running;

[0043] The fourth liquid delivery pipe is provided with a third solenoid valve 15 for regulating the rate of inflow of the plating solution;

[0044] The pneumatic stirring device, the first solenoid valve, the second solenoid valve, the third solenoid valve 15 and the magnetic pump 13 are all connected to an external controller; the liquid level controller 14 is connected to an external controller; the temperature control device 10 is connected to an external controller;

[0045] The gas stirring of the pneumatic stirring device is controlled by the controller, the liquid level of the high-level tank unit is monitored in real time according to the liquid level controller 14, and the opening and closing of the first solenoid valve, the second solenoid valve, the third solenoid valve 15 and the magnetic pump 13 and the flow rate of the plating solution are controlled. The temperature of the plating solution in the first low-level tank and the second low-level tank is adjusted in real time by the temperature control device 10 to realize automated control of production.

[0046] The specific embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A device for composite electrodeposition of lead dioxide, characterized in that: It includes electrolysis unit, low-level tank unit and high-level tank unit. The electrolysis device unit comprises an electrolytic cell (1), a first isolation membrane (4) is vertically arranged in the electrolytic cell (1), the two sides of the first isolation membrane (4) are an electrolysis zone and a lead nitrate plating solution circulation zone respectively, a pneumatic stirring device (6) is arranged at the bottom end of the first isolation membrane (4), the bottom plate of the electrolysis zone of the electrolytic cell (1) is an inclined plate (5), the upper and lower ends of the inclined plate (5) are respectively A end and B end, the A end of the inclined plate (5) is located at the bottom end of the first isolation membrane (4), and the top end of the electrolytic cell (1) is provided with two pneumatic stirring devices (6). Conductive copper bars (7), two conductive copper bars (7) are fixedly arranged along two parallel side walls and the two conductive copper bars (7) are respectively externally connected to the positive and negative electrodes of the rectifier (8); anode plates (2) and cathode plates (3) are alternately inserted in the electrolysis area of the electrolytic cell (1); the anode plates (2) and cathode plates (3) are parallel to the first isolation membrane (4); two conductive heads on the top conductive beams of the anode plates (2) and the cathode plates (3) are respectively electrically connected to the rectifier (8) through the two conductive copper bars (7); The lead nitrate plating solution circulation area of the electrolytic cell (1) is connected to the low-level cell unit, and the low-level cell unit is connected to the high-level cell unit via a circulating magnetic pump (13).

2. The device for composite electrodeposition of lead dioxide according to claim 1, characterized in that: An acid mist exhaust device (9) is fixedly provided on the top of the electrolytic cell (1).

3. The device for composite electrodeposition of lead dioxide according to claim 1, characterized in that: The top of the first isolation membrane (4) is a semipermeable membrane, and the bottom of the first isolation membrane (4) is an isolation plate.

4. The device for composite electrodeposition of lead dioxide according to claim 3, characterized in that: The height of the semipermeable membrane accounts for 1 / 4 to 1 / 2 of the total height of the first isolation membrane (4), and the height of the isolation plate accounts for 1 / 2 to 3 / 4 of the total height of the first isolation membrane (4).

5. The device for composite electrodeposition of lead dioxide according to claim 1, characterized in that: The low-level tank unit includes a first low-level tank and a second low-level tank that are connected. A sieve plate (11) is vertically arranged in the first low-level tank. The two sides of the sieve plate (11) are respectively a first cavity and a second cavity. The bottom of the first cavity of the first low-level tank and the bottom of the second low-level tank are both provided with a pneumatic stirring device (6). The lead nitrate plating solution circulation area of the electrolytic tank (1) is connected to the first cavity of the first low-level tank through a first infusion pipe. A first solenoid valve is provided on the first infusion pipe. The second low-level tank is connected to the second low-level tank through a second infusion pipe. A second solenoid valve is provided on the second infusion pipe. The second low-level tank is connected to the high-level tank unit through a third infusion pipe. A magnetic pump (13) is provided on the third infusion pipe.

6. The device for composite electrodeposition of lead dioxide according to claim 5, characterized in that: The side walls of the first low-level tank and the second low-level tank are both provided with heaters, and the heaters are externally connected to a temperature control device (10).

7. The device for composite electrodeposition of lead dioxide according to claim 5, characterized in that: The inlet end of the third infusion tube is provided with a filtering device (12).

8. The device for composite electrodeposition of lead dioxide according to claim 5, characterized in that: The high-level tank unit is arranged on a bracket (16), and is provided with a liquid level controller (14). The discharge port of the high-level tank unit is connected to the electrolysis zone of the electrolytic tank (1) through a fourth liquid delivery pipe.

9. The device for composite electrodeposition of lead dioxide according to claim 8, characterized in that: The fourth infusion tube is provided with a third electromagnetic valve (15).

10. The device for composite electrodeposition of lead dioxide according to claim 9, characterized in that: The first solenoid valve, the second solenoid valve, the third solenoid valve (15) and the magnetic pump (13) are all connected to an external controller.

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