Electrocatalytic dissolving equipment for waste solar panel

Abstract

The utility model belongs to the technical field of solid waste treatment, and particularly relates to waste solar panel electrocatalytic dissolution equipment. The utility model provides waste solar panel electro-catalysis dissolving equipment. The device comprises an anion solution storage tank and is characterized in that the lower end of a first connecting pipeline is arranged at the lower part in the anion solution storage tank, the upper end of the first connecting pipeline is connected with an inlet of a first pump, an outlet of the first pump is connected with the upper end of a second connecting pipeline, and the lower end of the second connecting pipeline is arranged at the lower part in an electro-catalysis dissolving tank; an upper inlet of the electro-catalysis dissolving tank is connected with an outlet of the acetonitrile aqueous solution storage tank through a second pump, a lower outlet of the electro-catalysis dissolving tank is connected with an inlet of the metal ion recovery device through a third pump, and a liquid outlet of the metal ion recovery device is connected with an inlet of the solvent recovery device through a fourth pump.

Description

Technical Field

[0001] This utility model belongs to the field of solid waste treatment technology, and in particular relates to an electrocatalytic dissolution device for waste solar panels. Background Technology

[0002] The first batch of photovoltaic power generation equipment in my country has reached the end of its service life and is beginning to be scrapped. The disposal of these waste solar panels has become an urgent issue. Currently, the recycling and processing of waste solar panels is in its initial stages, with high processing costs and serious pollution. In response to the national call for solid waste recycling and green development, this utility model addresses this problem by providing a device for recycling and processing rare and precious metals from waste solar panels. Utility Model Content

[0003] This invention addresses the aforementioned problems by providing an electrocatalytic dissolution device for waste solar panels.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: the present invention includes an anion solution storage tank, characterized in that the lower end of the first connecting pipe is placed in the lower part of the anion solution storage tank, the upper end of the first connecting pipe is connected to the inlet of the first pump, the outlet of the first pump is connected to the upper end of the second connecting pipe, the lower end of the second connecting pipe is placed in the lower part of the electrocatalytic dissolution tank, the upper inlet of the electrocatalytic dissolution tank is connected to the outlet of the acetonitrile aqueous solution storage tank through the second pump, the lower outlet of the electrocatalytic dissolution tank is connected to the inlet of the metal ion recovery device through the third pump, and the outlet of the metal ion recovery device is connected to the inlet of the solvent recovery device through the fourth pump.

[0005] As a preferred embodiment, a valve is provided at the lower outlet of the electrocatalytic dissolution tank of this invention.

[0006] As another preferred option, the valve described in this utility model is a carbon steel valve.

[0007] As another preferred embodiment, the first and second connecting pipes of this invention are made of PVC pipes.

[0008] As another preferred embodiment, the electrocatalytic dissolution tank of this invention is provided with a catalyst reaction electrode plate, a counter electrode plate, a pH sensor, a temperature sensor, and a heater; the catalyst reaction electrode plate and the counter electrode plate are connected to the power output port of the power supply equipment; the detection signal output ports of the pH sensor and the temperature sensor are connected to the detection signal input port of the monitoring controller; and the control signal output port of the monitoring controller is connected to the control signal input port of the power supply equipment, the control signal input port of the heater, the control signal input port of the first pump, the control signal input port of the second pump, the control signal input port of the third pump, and the control signal input port of the fourth pump, respectively.

[0009] As another preferred embodiment, the catalyst reaction electrode plate of this invention is a Pb / SnO2 electrode plate, and the counter electrode plate is a graphite electrode plate.

[0010] As another preferred embodiment, the anion solution storage tank of this invention is a stainless steel sealed storage tank.

[0011] As another preferred embodiment, the catalyst reaction electrode plate and counter electrode plate of this invention are multiple and are alternately and parallelly arranged on the electrode plate support.

[0012] As another preferred embodiment, the electrode plate support of this utility model adopts an alloy shell, and a positive electrode wire and a negative electrode wire are arranged inside the alloy shell. The positive electrode wire is connected to the catalyst reaction electrode plate, and the negative electrode wire is connected to the counter electrode plate.

[0013] As another preferred embodiment, the electrode plate support of this utility model includes two rows of support rods, which pass through the perforations on both sides of the upper end of the catalyst reaction electrode plate and the counter electrode plate. The two rows of support rods are provided with overlapping frames at both ends, and the lower end of the overlapping frame is connected to the upper end of the electrocatalytic dissolution tank. The overlapping frame is provided with a wiring terminal.

[0014] Secondly, the metal ion recovery device described in this utility model adopts a stainless steel centrifugal solid-liquid separator.

[0015] In addition, the solvent recovery device described in this utility model uses a waste liquid collector.

[0016] The beneficial effects of this utility model.

[0017] In use, the waste solar panel is placed in an electrocatalytic dissolution tank. An anionic solution and an acetonitrile aqueous solution are injected into the tank via a first and a second pump. The electrocatalytic dissolution tank performs an electrocatalytic dissolution reaction on the solar panel, precipitating precious metals from it. These precious metals are then recovered using a metal ion recovery device, and the reaction solvent is recovered using a solvent recovery device.

[0018] This invention recovers economically valuable byproducts through a metal ion recovery device and a solvent recovery device, thereby indirectly reducing recovery costs.

[0019] This invention utilizes an electrocatalytic dissolution tank to catalytically dissolve waste solar panels, preventing them from being directly discarded and causing environmental pollution. Simultaneously, a solvent recovery device recovers the solvent, ensuring no pollution is generated during the process. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The scope of protection of the present invention is not limited to the following description.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] In the diagram, 1 is the anion solution storage tank, 2 is the first connecting pipe, 3 is the first pump, 4 is the second connecting pipe, 5 is the electrocatalytic dissolution tank, 6 is the temperature sensor connection line, 7 is the pH sensor connection line, 8 is the monitoring controller, 9 is the power supply equipment, 10 is the catalyst reaction electrode plate, 11 is the counter electrode plate, 12 is the valve, 13 is the second pump, 14 is the solvent recovery device, 15 is the acetonitrile aqueous solution storage tank, 16 is the metal ion recovery device, and 17 is the third pump. Detailed Implementation

[0023] As shown in the figure, this utility model includes an anion solution storage tank 1, the lower end of the first connecting pipe 2 is placed in the lower part of the anion solution storage tank 1, the upper end of the first connecting pipe 2 is connected to the inlet of the first pump 3, the outlet of the first pump 3 is connected to the upper end of the second connecting pipe 4, the lower end of the second connecting pipe 4 is placed in the lower part of the electrocatalytic dissolution tank 5, the upper inlet of the electrocatalytic dissolution tank 5 is connected to the outlet of the acetonitrile aqueous solution storage tank 15 through the second pump 13, the lower outlet of the electrocatalytic dissolution tank 5 is connected to the inlet of the metal ion recovery device 16 through the third pump 17, and the outlet of the metal ion recovery device 16 is connected to the inlet of the solvent recovery device 14 through the fourth pump.

[0024] The first connecting pipe 2 and the second connecting pipe 4 are made of PVC pipes. PVC is a synthetic plastic that does not participate in the reaction and has good corrosion resistance.

[0025] A valve 12 is installed at the lower outlet of the electrocatalytic dissolution tank 5.

[0026] The valve 12 is made of carbon steel and has good corrosion resistance.

[0027] The acetonitrile aqueous solution stored in storage tank 15 is inexpensive and easy to store; the treatment process does not generate strong acids or alkalis, and there are no subsequent treatment costs.

[0028] The electrocatalytic dissolution tank 5 is equipped with a catalyst reaction electrode plate 10, a counter electrode plate 11, a pH sensor, a temperature sensor, and a heater. The catalyst reaction electrode plate 10 and the counter electrode plate 11 are connected to the power output port of the power supply device 9. The detection signal output ports of the pH sensor and the temperature sensor are connected to the detection signal input port of the monitoring controller 8. The control signal output port of the monitoring controller 8 is connected to the control signal input port of the power supply device 9, the control signal input port of the heater, the control signal input port of the first pump, the control signal input port of the second pump, the control signal input port of the third pump, and the control signal input port of the fourth pump, respectively.

[0029] The monitoring controller 8 controls the operating status of the power supply equipment 9, heater, and first to fourth pumps based on the detection signals input from the pH and temperature sensors and the operator's instructions, thus efficiently and accurately completing the reaction process. The display of the monitoring controller 8 can show the pH value and temperature in real time.

[0030] The catalytic reaction within the electrocatalytic dissolution tank 5 requires controlled temperature and pH. Temperature is controlled by manipulating the heater; pH is controlled by manipulating the first pump to control the amount of anion exchange solution added. Subsequent processes are completed by controlling the second to fourth pumps. The electrode plates are controlled by manipulating the power supply equipment 9.

[0031] The catalyst reaction electrode plate 10 and the counter electrode plate 11 are multiple and are alternately and parallelly arranged on the electrode plate support to improve reaction efficiency.

[0032] The electrode plate support adopts an alloy shell, and a positive electrode wire and a negative electrode wire are arranged inside the alloy shell. The positive electrode wire is connected to the catalyst reaction electrode plate 10, and the negative electrode wire is connected to the counter electrode plate 11.

[0033] The electrode plate support includes two rows of support rods 20, which pass through perforations on both sides of the upper end of the catalyst reaction electrode plate 10 and the counter electrode plate 11. Overlapping frames 19 are provided at both ends of the two rows of support rods 20. The lower end of the overlapping frame 19 connects to the upper end of the electrocatalytic dissolution tank 5, and a wiring terminal 18 is provided on the overlapping frame 19. The perforations can be insulated, and the wiring terminal 18 is connected to the power output port of the power supply equipment 9 via a wire.

[0034] The catalyst reaction electrode plate 10 is a Pb / SnO2 electrode plate, and the counter electrode plate 11 is a graphite electrode plate. The use of a Pb / SnO2 electrode plate in the catalyst reaction electrode plate 10 ensures stability while accelerating water oxidation kinetics and increasing free radical production.

[0035] The Pb / SnO2 electrode plate can be fabricated using the method described in the paper "Electrochemical degradation of methylene blue by Pb modified porous SnO2 anode" published in Chemosphere.

[0036] The anion solution storage tank 1 is a stainless steel sealed tank. A stainless steel sealed tank can be found at the following website: https: / / www.diankejixie.com / ?list_18 / 208.html.

[0037] The metal ion recovery device 16 employs a stainless steel centrifugal solid-liquid separator. The metal complex produced by the reaction is a fine particulate solid, which is separated from the liquid by the solid-liquid separator. A stainless steel centrifugal solid-liquid separator can be used at the following website: https: / / b2b.baidu.com / land? url=http%3A%2F%2Fwww.912688.com%2Fsupply%2F363465660.html&query=%E9%87%91%E5%B1%9E%E7%BB%9C%E5%90%88%E7%89%A9%E4%B8% 8E%E6%BA%B6%E6%B6%B2%E7%A6%BB%E5%BF%83%E5%88%86%E7%A6%BB%E8%A3%85%E7%BD%AE&lattr=&xzhid=37557300&pi=b2b.s.main.8..124 0588462791321&category=%E6%9C%BA%E6%A2%B0%E8%AE%BE%E5%A4%87%3B%E8%BF%87%E6%BB%A4%E8%AE%BE%E5%A4%87%3B%E8%BF%87%E6%BB% A4%E5%99%A8&fid=67174400%2C1739277200206&iid=769f14f42f72e3705eeaa0bf22bef1e9&miniId=8469&jid=2705101463&prod_type=0.

[0038] The solvent recovery device 14 employs a waste liquid collector. A waste liquid collector from the following URL can be used: https: / / b2b.baidu.com / land?url=https%3A%2F%2Fb2bwork.baidu.com%2Fland%3Flid%3D1708427339414046322&query=%E5%AE%BD%E5%AE%9D%E4%B9%99%E8%85%88%E5%9B%9E%E6%94%B6%E6%9C%BA&lattr=ot&xzhid=1358697&from=b2b_stra ight&pi=baidu.b2b_straight.prod.3&category=%E6%9C%BA%E6%A2%B0%E8%AE%BE%E5%A4%87%3B%E5%88%86%E7%A6%BB%E8%AE%BE%E5%A4% 87%3B%E8%92%B8%E9%A6%8F%E8%AE%BE%E5%A4%87&iid=610c347c4373bb3e3bacb8bc5e490434&miniId=8469&jid=13659242&prod_type=0.

[0039] Acetonitrile aqueous solution is injected into the electrocatalytic dissolution tank 5 through the second pump 13, and the reaction is carried out by controlling the appropriate temperature and pH value.

[0040] This invention involves immersing a solar panel in an acetonitrile aqueous solution for reaction, followed by the injection of an anionic solution for further reaction, causing precious metals (such as silver) to precipitate from the solar panel. This is an existing hydrometallurgical technology.

[0041] The fine particulate metal complexes generated in the electrocatalytic dissolution tank 5 float in the liquid and are promptly introduced into the metal ion recovery device 16 via the third pump 17 to prevent the metal complexes from precipitating due to prolonged standing.

[0042] Anionic solutions can be halide ion and ammonium chloride ion solutions, which promote the reaction during the dissolution process. Ammonium chloride solution can also be used as anionic solution.

[0043] The working process of this utility model will be described below with reference to the accompanying drawings.

[0044] After simple crushing, the solar panel is placed into the electrocatalytic dissolution tank 5. The second pump 13 is started to inject the acetonitrile aqueous solution from the acetonitrile aqueous solution storage tank 15 into the electrocatalytic dissolution tank 5, immersing the solar panel to form an acetonitrile electrolyte.

[0045] Power supply device 9 is turned on, activating catalyst reaction electrode plate 10 and counter electrode plate 11. Acetonitrile molecules are reduced near catalyst reaction electrode plate 10 (positive electrode), generating alkyl radicals. Water molecules (acetonitrile aqueous solution is a mixture of acetonitrile and water) are cleaved at counter electrode plate 11 (negative electrode), generating hydroxyl radicals. The hydroxyl radicals then react with alkyl radicals to generate cyano radicals.

[0046] The first pump 3 is started, allowing the anion solution in the anion solution storage tank 1 to enter the electrocatalytic dissolution tank 5, promoting the reaction of cyano radicals with noble metal ions on the solar panel to generate metal complexes.

[0047] After the reaction is complete, open valve 12 and start the third pump 17 to allow the mixed solution containing the metal complex to enter the metal ion recovery device 16, separating the metal complex from the solution.

[0048] Start the fourth pump to allow the separated solution to enter the solvent recovery unit 14 to recover the acetonitrile solution (the solution at this point is pure acetonitrile). Collect the remaining metal complexes in the metal ion recovery unit 16, which can then be used in metallurgical engineering as needed.

[0049] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of this utility model.

Claims

1. A device for electro-catalytic dissolution of waste solar panels, comprising a tank for storage of an anionic solution, characterized in that The lower end of the first connecting pipe is arranged in the lower part of the anion solution storage tank, the upper end of the first connecting pipe is connected with the inlet of the first pump, the outlet of the first pump is connected with the upper end of the second connecting pipe, the lower end of the second connecting pipe is arranged in the lower part of the electro-catalytic dissolving tank, the upper inlet of the electro-catalytic dissolving tank is connected with the outlet of the acetonitrile aqueous solution storage tank through the second pump, the lower outlet of the electro-catalytic dissolving tank is connected with the inlet of the metal ion recovery device through the third pump, and the outlet of the metal ion recovery device is connected with the inlet of the solvent recovery device through the fourth pump.

2. The electro-catalytic dissolution apparatus for waste solar panels of claim 1, wherein A valve is arranged at the lower outlet of the electro-catalytic dissolving tank.

3. The electro-catalytic dissolution apparatus for waste solar panels of claim 1, wherein The electro-catalytic dissolving tank is provided with a catalyst reaction electrode plate, a counter electrode plate, a pH sensor, a temperature sensor and a heater; the catalyst reaction electrode plate and the counter electrode plate are connected with the power output port of the power supply device; the detection signal output port of the pH sensor and the temperature sensor is connected with the detection signal input port of the monitoring controller, and the control signal output port of the monitoring controller is connected with the control signal input port of the power supply device, the control signal input port of the heater, the control signal input port of the first pump, the control signal input port of the second pump, the control signal input port of the third pump and the control signal input port of the fourth pump respectively.

4. The electro-catalytic dissolution apparatus for waste solar panels of claim 3, wherein The catalyst reaction electrode plate adopts a Pb / SnO2 electrode plate, and the counter electrode plate adopts a graphite electrode plate.

5. The electro-catalytic dissolution apparatus for waste solar panels of claim 1, wherein The anion solution storage tank adopts a stainless steel sealed storage tank.

6. The electro-catalytic dissolution apparatus for waste solar panels of claim 3, wherein The catalyst reaction electrode plate and the counter electrode plate are multiple and are arranged alternately and in parallel on the electrode plate support.

7. The electrocatalytic dissolution apparatus of waste solar panels according to claim 6, characterized in that The electrode plate support adopts an alloy shell, and the alloy shell is provided with a positive electrode lead and a negative electrode lead, the positive electrode lead is connected with the catalyst reaction electrode plate, and the negative electrode lead is connected with the counter electrode plate.

8. The electrocatalytic dissolution apparatus for waste solar panels of claim 6, wherein The electrode plate support includes two rows of support rods, the two rows of support rods pass through the perforations on the two sides of the upper ends of the catalyst reaction electrode plate and the counter electrode plate, the two ends of the two rows of support rods are provided with overlapping frames, the lower ends of the overlapping frames are connected with the upper end of the electro-catalytic dissolving tank, and the overlapping frames are provided with terminal heads.

9. The electro-catalytic dissolution apparatus for waste solar panels of claim 1, wherein The metal ion recovery device adopts a stainless steel centrifugal solid-liquid separator.

10. The electro-catalytic dissolution apparatus for waste solar panels of claim 1, wherein The solvent recovery device adopts a waste liquid collector.

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