Copper acid recovery device in electrolytic copper foil system

Abstract

The utility model discloses a copper acid recovery device in an electrolytic copper foil system, which comprises an acid mist recovery tank, and a liquid tank is arranged at the lower part in the acid mist recovery tank; the spraying assembly is mounted at the upper position in the acid mist recovery tank; the liquid pumping assembly is mounted between the liquid tank and the spraying pipe; the input pipeline is mounted on one side of the acid mist recovery tank; according to the acid mist recycling device, through mutual cooperation of the liquid pumping assembly, the spraying assembly and the liquid outlet assembly, part of copper acid in the acid mist can be condensed on copper sulfate water which is continuously sprayed downwards and falls back into the liquid tank, and after a copper sulfate solution in the liquid tank reaches the liquid outlet level, the copper sulfate solution in the acid mist can be recycled. When the acid mist is absorbed, the acid mist overflows into a copper dissolving system, equivalently, pretreatment is performed before the acid mist is absorbed, part of copper acid in the acid mist is removed and recycled, in the subsequent acid mist treatment process, the use amount of caustic soda flakes for neutralization reaction and the waste liquid treatment cost can be reduced, and energy conservation and emission reduction are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolytic copper foil equipment, in particular to a copper acid recovery device in an electrolytic copper foil system. Background Art

[0002] During the production process of electrolytic copper foil, a large amount of high-temperature acid mist will be generated, and a special acid mist absorption device must be used to absorb the acid mist to prevent it from corroding equipment or polluting the environment.

[0003] In the prior art, after the acid mist is transported to the acid mist absorption tower, it will be neutralized by alkali liquid spraying. The qualified gas with neutral reaction is discharged outward, and the remaining liquid containing copper ions and acid-base ions is treated through a special wastewater treatment process and can only be discharged after reaching the standard. In the actual production process, in order to meet the requirements of up-to-standard discharge of waste gas and wastewater, a very high operating cost is required, and a large amount of energy is wasted in the middle. It is necessary to improve the process of acid mist treatment. Summary of the Utility Model

[0004] To solve the above problems, the utility model proposes a copper acid recovery device in an electrolytic copper foil system.

[0005] The technical solution adopted by the utility model is as follows: a copper acid recovery device in an electrolytic copper foil system, wherein an acid mist absorption device for absorbing and neutralizing acid mist is provided in the electrolytic copper foil system, and the acid mist is generated from a copper foil production line. The copper acid recovery device includes: an acid mist recovery tank, and a liquid tank for containing copper sulfate solution is arranged below the interior of the acid mist recovery tank;

[0006] A spraying assembly is installed at a position close to the upper part inside the acid mist recovery tank, and includes a spraying pipe and a plurality of nozzles installed on the spraying pipe. The spraying direction of the nozzles is downward;

[0007] A liquid pumping assembly is installed between the liquid tank and the spraying pipe for pumping the copper sulfate solution in the liquid tank into the spraying pipe; an input pipeline is installed on one side of the acid mist recovery tank for introducing the acid mist into the acid mist recovery tank, and the entry position of the acid mist is above the liquid tank;

[0008] An output pipeline is installed between the acid mist recovery tank and the acid mist absorption device for guiding the acid mist rising to the uppermost part inside the acid mist recovery tank to the acid mist absorption device.

[0009] The following also provides several optional ways, but they are not additional limitations to the above overall solution, but only further supplements or optimizations. Without technical or logical contradictions, each optional way can be combined with the above overall solution alone, or multiple optional ways can be combined with each other.

[0010] Preferably, the liquid pumping assembly includes a liquid pumping pipe and a circulation pump installed on the liquid pumping pipe.

[0011] Preferably, the liquid pumping pipe includes a first pipeline disposed between the liquid tank and the circulation pump, and a second pipeline disposed between the circulation pump and the spray pipe. A first regulating valve is provided on the first pipeline, and a second regulating valve is provided on the second pipeline.

[0012] Preferably, the liquid tank has an outlet liquid level, and the copper acid recovery device further includes:

[0013] A liquid outlet assembly, installed on one side of the outlet liquid level, for overflowing the copper sulfate solution rising to the outlet liquid level into the copper dissolving system.

[0014] Preferably, the liquid outlet assembly includes a liquid outlet pipe, and a third regulating valve is provided on the liquid outlet pipe.

[0015] More preferably, the nozzle is a spiral nozzle, and a plurality of the spiral nozzles are uniformly arranged at intervals along the extending direction of the spray pipe.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] Before the acid mist enters the acid mist absorption device, the acid mist is pretreated by the acid mist recovery device. After the acid mist enters the acid mist recovery tank, the nozzles in the spray assembly continuously spray a low-concentration copper sulfate solution (extracted from the liquid tank by the liquid pumping assembly) downward. After the downwardly sprayed low-concentration copper sulfate solution contacts the acid mist, it will attach and condense a part of the copper sulfate in the acid mist and fall back into the liquid tank. As the spray assembly continuously sprays and rinses the acid mist, the concentration and liquid level of the copper sulfate solution in the liquid tank will continuously increase. When it reaches the outlet liquid level, it will overflow into the copper dissolving system, which is equivalent to removing a part of the copper sulfate in the acid mist and recycling this part of the copper sulfate into the copper dissolving system. In addition, since the copper acid content in the acid mist is reduced, during the subsequent treatment of the acid mist by the acid mist absorption device, the consumption of flake caustic soda for the neutralization reaction and the waste liquid treatment cost will both be reduced, which is beneficial to energy conservation and emission reduction and has strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0019] Figure 1This is a schematic assembly plan view of a copper acid recovery device and an acid mist absorption device in an embodiment of the present application.

[0020] In the drawings, the labels are: 1 - acid mist recovery tank, 11 - liquid tank, 2 - input pipeline, 3 - liquid extraction pipe, 31 - first regulating valve, 32 - second regulating valve, 4 - circulation pump, 5 - spray assembly, 51 - spray pipe, 52 - spiral nozzle, 6 - copper sulfate solution, 7 - liquid outlet pipe, 71 - third regulating valve, 8 - output pipeline, 9 - acid mist absorption device.

[0021] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0024] In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0025] Specific implementation plan: Refer to Figure 1 , the present utility model is a copper acid recovery device in an electrolytic copper foil system. An acid mist absorption device 9 for absorbing and neutralizing acid mist is provided in the electrolytic copper foil system. The acid mist is generated from the copper foil production line. The copper acid recovery device includes:

[0026] An acid mist recovery tank 1, and a liquid tank 11 for containing copper sulfate solution 6 is provided below the interior of the acid mist recovery tank 1;

[0027] The spraying assembly 5 is installed at the upper position inside the acid mist recovery tank 1 and includes a spray pipe 51 and a number of nozzles installed on the spray pipe 51. The spraying direction of the nozzles is downward.

[0028] The liquid pumping assembly is installed between the liquid tank 11 and the spray pipe 51 and is used to pump the copper sulfate solution 6 located in the liquid tank 11 into the spray pipe 51. The input pipeline 2 is installed on one side of the acid mist recovery tank 1 and is used to introduce acid mist into the acid mist recovery tank 1. Moreover, the entry position of the acid mist is above the liquid tank 11.

[0029] The output pipeline 8 is installed between the acid mist recovery tank 1 and the acid mist absorption device 9 and is used to convey the acid mist rising to the uppermost part inside the acid mist recovery tank 1 to the acid mist absorption device 9.

[0030] As a preferred implementation manner of this embodiment, the liquid pumping assembly includes a liquid pumping pipe 3 and a circulating pump 4 installed on the liquid pumping pipe 3.

[0031] In this embodiment, the liquid pumping pipe 3 includes a first pipeline arranged between the liquid tank 11 and the circulating pump 4 and a second pipeline arranged between the circulating pump 4 and the spray pipe 51. A first regulating valve 31 is provided on the first pipeline, and a second regulating valve 32 is provided on the second pipeline.

[0032] When it is necessary to start the spraying function of the spraying assembly 5, the circulating pump 4 needs to be started. After the circulating pump 4 is started, the copper sulfate solution 6 in the liquid tank 11 can be continuously sucked into the liquid pumping pipe 3.

[0033] Here, the first regulating valve 31 is used to regulate the flow rate of the copper sulfate solution 6 passing through the first pipeline, and the second regulating valve 32 is used to regulate the flow rate of the copper sulfate solution 6 passing through the second pipeline, so as to flexibly control the flow rate of the copper sulfate solution 6 entering the spray pipe 51.

[0034] In addition, in this embodiment, the liquid tank 11 has an outlet liquid level, and the copper acid recovery device further includes:

[0035] The liquid discharging assembly is installed on one side of the outlet liquid level and is used to overflow the copper sulfate solution 6 rising to the outlet liquid level into the copper dissolving system.

[0036] In this embodiment, the liquid discharging assembly includes a liquid discharging pipe 7, and a third regulating valve 71 is provided on the liquid discharging pipe 7.

[0037] Here, the third regulating valve 71 is used to regulate the flow rate of the copper sulfate solution 6 passing through the liquid discharging pipe 7, so as to control the flow rate of the copper sulfate solution 6 replenished and refluxed into the copper dissolving system. When the entry amount of the acid mist increases, it is necessary to increase the spraying amount of the nozzles to more comprehensively contact the acid mist. Therefore, at this time, the increasing speed of the liquid level of the copper sulfate solution 6 in the liquid tank 11 will also increase, and at this time, it is necessary to increase the opening degree of the third regulating valve 71.

[0038] More specifically, the nozzle is a spiral nozzle 52, and a plurality of spiral nozzles 52 are evenly spaced from each other along the extension direction of the spray pipe 51.

[0039] Here, the setting of the spiral nozzle 52 can achieve the decentralized spraying of the copper sulfate solution 6, so that all the acid mist entering the acid mist recovery tank 1 can come into contact with the copper sulfate solution 6 sprayed from the spiral nozzle 52. Since the temperature of the acid mist is relatively high, when the acid mist comes into contact with the copper sulfate solution 6, some of the copper sulfate in it will condense on the falling copper sulfate water droplets due to cooling and continue to drip into the liquid tank 11.

[0040] For easy understanding, please refer to Figure 1 , and the specific application principle of the copper acid recovery device will be described below:

[0041] After the acid mist enters the acid mist recovery tank 1, the circulation pump 4 needs to be started, and the opening degrees of the first regulating valve 31, the second regulating valve 32, and the third regulating valve 71 are adjusted according to the flow rate of the acid mist. The circulation pump 4 operates to draw the low-concentration copper sulfate solution 6 in the liquid tank 11 into the spray pipe 51 through the liquid extraction pipe 3. At this time, the multiple spiral nozzles 52 installed on the spray pipe 51 will continuously spray the low-concentration copper sulfate solution 6 downward. When the downwardly sprayed low-concentration copper sulfate water droplets come into contact with the acid mist, they will attach and condense some of the copper sulfate in the acid mist. As the spray assembly 5 continuously sprays and flushes the acid mist, the concentration and liquid level of the copper sulfate solution 6 in the liquid tank 11 will continuously increase. When it reaches the out liquid level, it will overflow into the copper dissolution system through the liquid outlet pipe 7. On the one hand, part of the copper sulfate in the acid mist is removed, reducing the copper acid content in the acid mist. On the other hand, it is equivalent to recycling the reduced copper acid in the acid mist into the copper dissolution system, which is beneficial to the recycling of resources. In addition, since the copper acid content in the acid mist is reduced, during the subsequent treatment of the acid mist by the acid mist absorption device 9 (acid mist absorption tower), the usage amount of flake caustic soda for the neutralization reaction and the waste liquid treatment cost will both be reduced, which is beneficial to energy conservation and emission reduction.

[0042] Note that in this embodiment, the acid mist absorption device 9 is an acid mist absorption tower, and the acid mist absorption tower belongs to the prior art and will not be elaborated here. The added copper acid recovery device in this embodiment is equivalent to performing a pretreatment on the acid mist before it is absorbed by the acid mist absorption tower, removing some of the copper acid in the acid mist, and recycling and utilizing this part of the metal copper and acid.

[0043] The copper acid recovery device in an electrolytic copper foil system of the present invention as described above is only the preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A copper acid recovery device in an electrolytic copper foil system, wherein an acid mist absorption device for absorbing and neutralizing acid mist is provided in the electrolytic copper foil system, and the acid mist is generated from a copper foil production line, and is characterized in that, The copper acid recovery device includes: An acid mist recovery tank, with a liquid tank for containing copper sulfate solution provided below the interior of the acid mist recovery tank; A spray assembly, installed at an upper position inside the acid mist recovery tank, and including a spray pipe and a number of nozzles installed on the spray pipe, with the spray direction of the nozzles facing downwards; A liquid pumping assembly, installed between the liquid tank and the spray pipe, for pumping the copper sulfate solution in the liquid tank into the spray pipe; An input pipeline, installed on one side of the acid mist recovery tank, for introducing the acid mist into the acid mist recovery tank, and the entry position of the acid mist is above the liquid tank; An output pipeline, installed between the acid mist recovery tank and the acid mist absorption device, for guiding the acid mist rising to the uppermost part inside the acid mist recovery tank to the acid mist absorption device.

2. The copper acid recovery device in an electrolytic copper foil system according to claim 1, wherein The liquid pumping assembly includes a liquid pumping pipe and a circulation pump installed on the liquid pumping pipe.

3. The copper acid recovery device in an electrolytic copper foil system according to claim 2, characterized in that, The liquid pumping pipe includes a first pipeline between the liquid tank and the circulation pump, and a second pipeline between the circulation pump and the spray pipe. A first regulating valve is provided on the first pipeline, and a second regulating valve is provided on the second pipeline.

4. The copper acid recovery device in an electrolytic copper foil system according to claim 2, characterized in that, The liquid tank has an outlet liquid level, and the copper acid recovery device further includes: An outlet liquid assembly, installed on one side of the outlet liquid level, for overflowing the copper sulfate solution rising to the outlet liquid level into the copper melting system.

5. The copper acid recovery device in an electrolytic copper foil system according to claim 4, wherein The outlet liquid assembly includes an outlet liquid pipe, and a third regulating valve is provided on the outlet liquid pipe.

6. The copper acid recovery device in an electrolytic copper foil system according to any one of claims 1-5, characterized in that, The nozzles are spiral nozzles, and a number of the spiral nozzles are evenly spaced from each other along the extension direction of the spray pipe.

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