Copper removal system for tin melting liquid

Abstract

The utility model discloses a system for removing copper from tin melting liquid. The system comprises a cooling device for treating the tin melting liquid, a filtering device for treating the tin melting liquid treated by the cooling device, and an electro-deposition device for performing electrochemical treatment on the tin melting liquid treated by the filtering device to remove copper. According to the copper removal system, elementary substance copper and ion copper in the tin melting liquid are removed through a physical method and an electrochemical method, the purity of the tin melting liquid can be guaranteed, the service life of the tin melting liquid is prolonged, the use cost of the tin melting liquid is reduced, and the follow-up sewage treatment difficulty is reduced; meanwhile, the uniformity and the quality stability of the tin melting process can be improved, the product quality is improved, and pollution diffusion caused by the fact that copper enters the follow-up process along with flowing of tin melting liquid is avoided; and elementary substance copper obtained through separation and electro-deposition of the tin melting liquid copper removal system can be recycled in a centralized mode, material waste is reduced, and meanwhile economic benefits can be generated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to photovoltaic copper plating technical field especially relates to a tin liquid copper removal system. BACKGROUND

[0002] In the preparation process of solar cell electrode, the copper electrode needs to be protected by chemical tin plating after the surface of the electrode plate is electroplated with copper. In the process of chemical tin plating, the divalent tin ions in the tin liquid tank react with copper, the divalent tin ions become tin deposition on the surface of copper, and the metal copper becomes copper ions into the tin liquid tank. The concentration of copper ions in the tank gradually rises with the production operation, thereby affecting the service life of the tin liquid and the deposition rate of tin plating, and further affecting the uniformity and quality stability of the tin plating process.

[0003] The utility model discloses a metal ion recovery filter processing device in the authorized announcement No. CN 204608157 U, discloses a kind of metal ion recovery filter processing device, including the cooling cylinder for containing liquid, cooling cylinder is provided with stirring cylinder, stirring cylinder is provided with the stirring device for scraping off the metal that precipitates and adheres to the stirring cylinder;Stirring cylinder or / and the bottom of cooling cylinder is connected with discharge pipe.The above-mentioned processing device can be used as online copper removal filter device, and copper ions in tin deposition medicine water are recovered and filtered, but the processing effect of the above-mentioned processing device is limited. UTILITY MODEL CONTENT

[0004] In view of the problems presented in the background art, the utility model provides a tin liquid copper removal system. The system can not only remove elemental copper in the tin liquid but also remove ionic copper in the tin liquid, thereby significantly prolonging the service life of the tin liquid.

[0005] The technical scheme for solving the above problems of the utility model is as follows:

[0006] A tin liquid copper removal system includes a cooling device for treating tin liquid, a filter device for treating tin liquid treated by the cooling device, and an electrodeposition device for electrochemically treating tin liquid treated by the filter device to remove copper.

[0007] Preferably, the cooling device is surrounded by a cooling assembly that cools the tin liquid by heat exchange.

[0008] Preferably, the cooling assembly includes a cooling coil and a heat exchanger connected to the cooling coil.

[0009] The cooling device cools and cools the tin liquid, so that the copper in the tin liquid is precipitated for subsequent treatment.

[0010] Preferably, the cooling device is provided with a stirrer for fully contacting the tin liquid with the cooling assembly.

[0011] Preferably, the stirrer comprises a stirring motor arranged outside the cooling device and a stirring shaft arranged inside the cooling device.

[0012] Preferably, the filtering device is provided with a filtering bag for filtering the tin liquid to remove copper and other impurities.

[0013] Preferably, the electrodeposition device is provided with an electrode assembly, the electrode assembly comprises titanium anode plates and titanium cathode plates arranged at intervals, and the titanium anode plates are electrified.

[0014] Preferably, the tin liquid copper removal system further comprises a temporary storage tank for temporarily storing the tin liquid, an inlet pipe for feeding the tin liquid is connected to an input end of the temporary storage tank, and an output end of the temporary storage tank is connected to an input end of the cooling device through a first conveying pipe.

[0015] Preferably, the inlet pipe comprises a plurality of branch pipes and a bus pipe for connecting the plurality of branch pipes at the input end, and an output end of the bus pipe is connected to the input end of the temporary storage tank.

[0016] Preferably, an output end of the electrodeposition device is connected to a conveying pump, the conveying pump is connected to an outlet pipe for conveying the tin liquid, and the tin liquid in the electrodeposition device is conveyed to the tin liquid tank through the conveying pump.

[0017] Preferably, the cooling device is connected to the filtering device through a second conveying pipe, and valves are arranged on the branch pipes, the first conveying pipe and the second conveying pipe.

[0018] Preferably, the valve is a pneumatic diaphragm valve, and emergency shutdown can be realized through the pneumatic diaphragm valve.

[0019] In summary, the utility model has the following beneficial effects:

[0020] 1. The utility model sets the cooling device, the filtering device and the electrodeposition device, removes the elemental copper and the ion copper in the tin liquid through physical methods and electrochemical methods, guarantees the purity of the tin liquid, prolongs the service life of the tin liquid, reduces the use cost of the tin liquid, and simultaneously can also reduce the difficulty of subsequent sewage treatment.

[0021] 2. After the copper ions are removed, the uniformity and the quality stability of the tin liquid process are improved, the product quality is improved, and pollution diffusion caused by copper flowing into subsequent processes with the tin liquid is avoided.

[0022] 3) The elemental copper obtained by separation and electrodeposition through the tin-removal copper system can be centrally recycled and reused, reducing material waste while generating economic benefits. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the copper removal system for tin melting solution disclosed in an embodiment of this utility model;

[0024] Figure 2 This is an enlarged view of the copper removal system for tin melting solution disclosed in an embodiment of this utility model;

[0025] Figure 3 This is a schematic diagram of the cooling device disclosed in an embodiment of the present utility model;

[0026] Figure 4 This is a schematic diagram of the electrodeposition apparatus disclosed in an embodiment of the present invention;

[0027] In the diagram: 100-tin melting tank, 1001-first tin melting tank, 1002-second tin melting tank, 11-first branch pipe, 12-second branch pipe, 13-manifold, 2-temporary storage tank, 31-first conveying pipe, 32-second conveying pipe, 4-cooling device, 41-cooling coil, 421-stirring motor, 422-stirring shaft, 5-filter device, 6-electrodeposition device, 61-titanium anode plate, 62-titanium cathode plate, 63-conductive plate, 7-transfer pump, 81-first outlet pipe, 82-second outlet pipe, 9-pneumatic diaphragm valve. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] A copper removal system using molten tin is connected to a molten tin bath 100 containing molten tin, such as... Figure 1 and Figure 2 As shown, the copper removal system includes a cooling device 4, a filtering device 5, and an electrodeposition device 6. The input end of the cooling device 4 is connected to the first conveying pipe 31, the output end of the cooling device 4 is connected to the input end of the filtering device 5 through the second conveying pipe 32, and the output end of the filtering device 5 is connected to the input end of the electrodeposition device 6. That is, the molten tin in the tin bath 100 passes through the cooling device 4 and the filtering device 5 in sequence before reaching the electrodeposition device 6.

[0030] Cooling device 4, such as Figure 3As shown, the cooling device 4 is provided with a cooling assembly, which includes a cooling coil 41 connected with a heat exchanger for cooling the tin solution and controlling the temperature of the tin solution to 10°C, so that the copper in the tin solution is crystallized and precipitated. To improve the cooling effect, a stirrer is arranged in the cooling device 4, which includes a stirring motor 421 arranged outside the cooling device 4 and a stirring shaft 422 arranged in the cooling device 4, and the tin solution is stirred so that the tin solution can uniformly and sufficiently contact the cooling coil 41, and the tin solution is rapidly cooled.

[0031] The cooled tin solution flows into the filtering device 5 through the second conveying pipe 32, and the filtering device 5 is provided with a filter bag for filtering the copper particles precipitated from the tin solution. The diameter of the copper particles is generally 1-5 μm, so the filter bag with a pore size smaller than the diameter of the copper particles is selected to ensure the filtering effect. In addition, the filter bag is detachably arranged in the filtering device 5, so that the filter bag can be replaced in time to prevent the copper particles in the filter bag from being deposited too much and affecting the filtering effect and the flow speed of the tin solution.

[0032] The electrodeposition device 6 is arranged below the filtering device 5, and the filtered tin solution flows into the electrodeposition device 6 to further remove the copper ions in the tin solution which have not been precipitated after the above treatment. The electrodeposition device 6 is provided with an electrode assembly, which includes a plurality of titanium anode plates 61 and titanium cathode plates 62 arranged at intervals, and the electrodeposition device 6 is provided with an electrically conductive plate 63 on the outside, the titanium anode plates 61 are electrified, the free copper ions in the tin solution can be deposited on the titanium cathode plates 62 in the form of metallic copper, and the tin solution does not react with titanium. In this embodiment, the number of titanium cathode plates 62 is 2, the number of titanium anode plates 61 is 3, and the titanium cathode plates 62 are arranged at intervals between the titanium anode plates 61. The arrangement of multiple plates can make the tin solution fully react with the electrode assembly and improve the electrolysis efficiency. In addition, the electrodeposition device 6 also has a storage function and can temporarily store the tin solution treated by removing copper.

[0033] The output end of the electrodeposition device 6 is also connected with a conveying pump 7, and the conveying pump 7 is communicated with a liquid outlet pipe, so that the tin solution treated in the electrodeposition device 6 can be conveyed back to the tin bath 100 through the conveying pump 7 and the liquid outlet pipe for repeated use.

[0034] In some embodiments, a temporary storage tank 2 is arranged between the tin bath 100 and the cooling device 4 for temporarily storing the tin solution to be treated. The tin bath 100 is communicated with the input end of the temporary storage tank 2 through a liquid inlet pipe, and the output end of the temporary storage tank 2 is communicated with the cooling device 4.

[0035] In some embodiments, the plurality of tinning tanks 100 can share a copper removal system for tin solution in parallel. For example, when there are two tinning tanks 100 in parallel, the inlet pipe includes a first branch pipe 11, a second branch pipe 12 and a converging pipe 13, wherein the first branch pipe 11 and the second branch pipe 12 are respectively connected to the first tinning tank 1001 and the second tinning tank 1002, and then the first branch pipe 11 and the second branch pipe 12 are jointly connected to the input end of the converging pipe 13, and the output end of the converging pipe 13 is in communication with the input end of the temporary storage tank 2.

[0036] The first branch pipe 11, the second branch pipe 12, the first conveying pipe 31 and the second conveying pipe 32 are respectively provided with a valve, and in the embodiment, the valve is a pneumatic diaphragm valve 9, and the pneumatic diaphragm valve 9 can be used for emergency shutdown.

[0037] When there are two tinning tanks 100 in parallel, the outlet pipe includes a first outlet pipe 81 and a second outlet pipe 82, the first outlet pipe 81 is in communication with the first tinning tank 1001, and is used for conveying the tin solution in the electrodeposition device 6 into the first tinning tank 1001; the second outlet pipe 82 is in communication with the second tinning tank 1002, and is used for conveying the tin solution in the electrodeposition device 6 into the second tinning tank 1002.

[0038] The working mode of the copper removal system for tin solution disclosed in the embodiment of the utility model is as follows:

[0039] The tin solution in the first tinning tank 1001 enters the temporary storage tank 2 through the first branch pipe 11 and the converging pipe 13, the tin solution in the second tinning tank 1002 enters the temporary storage tank 2 through the second branch pipe 12 and the converging pipe 13, the tin solution in the temporary storage tank 2 enters the cooling device 4 through the first conveying pipe 31, the cooling device 4 cools the tin solution to make copper crystallize and precipitate, the tin solution after cooling enters the filtering device 5 through the second conveying pipe 32, the filtering device 5 filters the copper particles precipitated due to cooling, the filtered tin solution enters the electrodeposition device 6, the electrodeposition device 6 electrolyzes the tin solution, and the residual copper ions in the tin solution are deposited on the titanium cathode plate 62 in the form of copper, at this time, the copper removal treatment of the tin solution is completed, and the treated tin solution can be temporarily stored in the electrodeposition device 6; when needed, the tin solution in the electrodeposition device 6 can return to the first tinning tank 1001 and the second tinning tank 1002 through the conveying pump 7, the first outlet pipe 81 and the second outlet pipe 82, and be reused.

[0040] Through the above treatment process, the elemental copper and ionic copper in the tin solution can be effectively removed, the service life of the tin solution is prolonged, the cost is reduced, and the uniformity and quality stability of the tinning process can be improved.

[0041] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A system for removing copper from a tin solution, characterized in that The cooling device (4) is used for treating the tin liquid, the filtering device (5) is used for treating the tin liquid treated by the cooling device (4), and the electrodeposition device (6) is used for electrochemically treating the tin liquid treated by the filtering device (5) to remove copper; The cooling device (4) is provided with a cooling assembly for cooling the tin liquid through heat exchange; The cooling assembly comprises a cooling coil (41) and a heat exchanger connected with the cooling coil (41); The filtering device (5) is provided with a filtering bag for filtering the tin liquid; The electrodeposition device (6) is provided with an electrode assembly, which comprises titanium anode plates (61) and titanium cathode plates (62) arranged at intervals, and the titanium anode plates (61) are electrified.

2. The system for removing copper from tin liquid according to claim 1, characterized in that, The cooling device (4) is provided with a stirrer for fully contacting the tin liquid with the cooling assembly.

3. The system for removing copper from a tin solution according to claim 1, wherein The tin liquid copper removal system further comprises a temporary storage tank (2) for temporarily storing the tin liquid, an input end of the temporary storage tank (2) is connected with an inlet pipe for the tin liquid, and an output end of the temporary storage tank (2) is connected with the cooling device (4) through a first conveying pipe (31).

4. The system for removing copper from tin liquid according to claim 3, characterized in that, The inlet pipe comprises a plurality of branch pipes and a bus pipe (13) connected with the plurality of branch pipes at the input end, and an output end of the bus pipe (13) is connected with the input end of the temporary storage tank (2).

5. The system for removing copper from a tin solution of claim 1, wherein, An output end of the electrodeposition device (6) is connected with a conveying pump (7), and the conveying pump (7) is connected with an outlet pipe for conveying the tin liquid.

6. The system for removing copper from a tin liquid according to claim 4, characterized in that, The cooling device (4) is connected with the filtering device (5) through a second conveying pipe (32), and valves are arranged on the branch pipes, the first conveying pipe (31) and the second conveying pipe (32).

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