Energy-saving copper dissolving tank device

Abstract

The utility model discloses an energy-saving copper dissolving tank device which comprises a copper dissolving tank, a dirty liquid tank, a clean liquid tank, a first pipeline, a second pipeline, a third pipeline, a first heat exchange unit and a second heat exchange unit, the first heat exchange unit is connected with the first pipeline and the second pipeline so as to achieve heat exchange between the first pipeline and the second pipeline. The second heat exchange unit is connected with the first pipeline and the third pipeline so as to achieve heat exchange between the first pipeline and the second pipeline. The liquid in the copper dissolving tank flows from the first heat exchange unit to the second heat exchange unit, the temperature is gradually reduced, redundant heat of the reacted solution is recycled for multiple times, the temperature of the liquid in the first pipeline is increased after the liquid passes through the second heat exchange unit and the first heat exchange unit, and the liquid entering the copper dissolving tank is preheated; the heat required for heating the liquid to the reaction temperature is reduced, and the energy consumption is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolytic copper foil production, in particular to an energy-saving copper dissolving tank device. Background Art

[0002] With the continuous development of science and technology, lithium-ion batteries are widely used in the field of new energy. This is because electrolytic copper foil has good conductivity, flexibility and corrosion resistance, good adhesion of functional coatings, and very mature manufacturing process technology. It has now become the preferred material for the negative electrode collector of lithium-ion batteries. The production process of electrolytic copper foil mainly involves dissolving copper to prepare electrolyte, and then pumping the electrolyte into the foil machine. The copper ions in the solution are electrolytically deposited on the cathode roller surface, and then rolled up after peeling, multiple water washing and drying, and anti-oxidation treatment.

[0003] The function of the copper dissolving tank is to dissolve the raw copper into copper sulfate solution. Dissolving copper requires a relatively high temperature, generally 60-70°C. In the prior art, a steam pipe is coiled around the copper dissolving tank, in which the steam flows continuously and exchanges temperature with the copper dissolving tank, thereby maintaining the tank temperature to ensure the efficiency of copper dissolving. The temperature of the liquid entering the copper dissolving tank is low, which will lower the tank temperature, which requires a large amount of steam to maintain the tank temperature. In addition, the temperature of the copper dissolving tank overflowing into the dirty liquid tank is very high, and a cooling plate is required to lower the temperature in order to meet the liquid temperature requirements of the foil machine, which requires a lot of energy consumption. Utility Model Content

[0004] The purpose of the utility model is to overcome the above technical deficiencies and provide an energy-saving copper dissolving tank device, which is used to solve the problem of huge energy consumption of the copper dissolving tank in the prior art.

[0005] In order to achieve the above technical objectives, the technical solution of the utility model is as follows: an energy-saving copper dissolving tank device, comprising a copper dissolving tank, a dirty liquid tank, a clean liquid tank, a first pipeline, a second pipeline, a third pipeline, a first heat exchange unit and a second heat exchange unit, wherein: the copper dissolving tank is connected to the first pipeline, the copper dissolving tank is connected to the dirty liquid tank by the second pipeline; the dirty liquid tank is connected to the clean liquid tank by the third pipeline,

[0006] The first heat exchange unit is connected to the first pipeline and the second pipeline respectively to achieve heat exchange between the first pipeline and the second pipeline; the second heat exchange unit is connected to the first pipeline and the third pipeline respectively to achieve heat exchange between the first pipeline and the second pipeline.

[0007] Preferably, the first heat exchange unit is located on the first pipeline between the second heat exchange unit and the copper melting tank.

[0008] Preferably, the energy-saving copper dissolving tank device further comprises a heater, and the heater is connected to the first pipeline.

[0009] Preferably, the heater is located on the first pipeline between the first heat exchange unit and the copper melting tank.

[0010] Preferably, the energy-saving copper dissolving tank device further comprises a filtering unit, and the filtering unit is connected to the third pipeline.

[0011] Preferably, the filter unit is a diatomaceous earth filter.

[0012] Preferably, the energy-saving copper dissolving tank device further comprises a sewage pump, and the sewage pump is connected to the second pipeline.

[0013] Preferably, the energy-saving copper dissolving tank device further comprises a clean liquid pump, and the clean liquid pump is connected to the third pipeline.

[0014] Preferably, the energy-saving copper dissolving tank device further comprises a temperature sensor, and the temperature sensor is arranged in the copper dissolving tank.

[0015] Preferably, the energy-saving copper dissolving tank device further comprises a foil raw machine, and the foil raw machine is connected to the clean liquid tank pipeline.

[0016] Compared with the prior art, the beneficial effects of the utility model include: the liquid in the copper dissolving tank flows from the first heat exchange unit to the second heat exchange unit, the temperature gradually decreases, the excess heat of the solution after the reaction is recovered multiple times, the temperature of the liquid in the first pipeline is increased through the second heat exchange unit and the first heat exchange unit, the liquid entering the copper dissolving tank is preheated, the heat required to heat the liquid to the reaction temperature is reduced, and energy consumption is greatly saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model provides an energy-saving copper dissolving tank device.

[0018] Figure numerals: 1-copper dissolving tank, 2-dirty liquid tank, 3-clean liquid tank, 4-first pipeline, 5-second pipeline, 6-third pipeline, 7-first heat exchange unit, 8-second heat exchange unit, 9-heater, 10-filter unit, 11-dirty liquid pump, 12-clean liquid pump, 13-temperature sensor, 14-foil production machine. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0020] See also Figure 1 The present embodiment provides an energy-saving copper dissolving tank device, which includes a copper dissolving tank 1, a dirty liquid tank 2, a clean liquid tank 3, a first pipeline 4, a second pipeline 5, a third pipeline 6, a first heat exchange unit 7 and a second heat exchange unit 8. The copper dissolving tank 1 is a reaction container for copper and sulfuric acid. The dirty liquid tank 2 is used to accommodate the solution flowing from the copper dissolving tank 1, and the clean liquid tank 3 is used to accommodate the solution flowing from the dirty liquid tank 2. The first pipeline 4 is used to pass the reaction liquid into the copper dissolving tank 1, the second pipeline 5 transports the liquid from the copper dissolving tank 1 to the dirty liquid tank 2, and the third pipeline 6 transports the liquid from the dirty liquid tank 2 to the clean liquid tank 3. The first heat exchange unit 7 realizes heat exchange between the first pipeline 4 and the second pipeline 5, and the second heat exchange unit 8 realizes heat exchange between the first pipeline 4 and the third pipeline 6.

[0021] The copper dissolving tank 1 is connected to the first pipe 4. Pure water is generally introduced into the first pipe 4 to dilute the concentrated sulfuric acid in the copper dissolving tank 1. Preferably, the first pipe 4 is connected to the bottom of the copper dissolving tank 1 so that water, concentrated sulfuric acid and copper are fully in contact. The copper dissolving tank 1 is connected to the dirty liquid tank 2 by a second pipe 5. Preferably, the second pipe 5 is connected to the top of the copper dissolving tank 1, and the copper sulfate solution enriched at the top of the copper dissolving tank 1 flows from the second pipe 5 to the dirty liquid tank 2. The dirty liquid tank 2 is connected to the clean liquid tank 3 by a third pipe 6, and the solution in the dirty liquid tank 2 enters the clean liquid tank 3 after filtering. Preferably, the energy-saving copper dissolving tank device also includes a clean liquid pump 12, which is connected to the third pipe 6. Preferably, the energy-saving copper dissolving tank device also includes a filtering unit 10, which is connected to the third pipe 6 to filter the solution in the third pipe 6. Further preferably, the filtering unit 10 is a diatomaceous earth filter, which has a high filtration rate, a long service life, low maintenance cost, environmental protection and energy saving, and is very suitable for filtering the copper sulfate solution in the dirty liquid tank 2. Preferably, the energy-saving copper dissolving tank device further comprises a waste liquid pump 11 , which is connected to the second pipeline 5 and is used to pump the liquid in the copper dissolving tank 1 into the waste liquid tank 2 .

[0022] The first heat exchange unit 7 is connected to the first pipe 4 and the second pipe 5 respectively to realize heat exchange between the first pipe 4 and the second pipe 5. The first heat exchange unit 7 can be a flat plate heat exchanger, a shell and tube heat exchanger, a spiral plate heat exchanger, a plate fin heat exchanger, a hot plate heat exchanger, etc. In this embodiment, the first heat exchange unit 7 is a shell and tube heat exchanger. Preferably, the position of the first heat exchange unit 7 on the first pipe 4 is between the second heat exchange unit 8 and the copper dissolving tank 1, so the liquid in the first pipe 4 enters the copper dissolving tank 1 through the second heat exchange unit 8 and the first heat exchange unit 7 in sequence. The temperature of the pure water entering the first pipe 4 is generally close to room temperature. The reaction temperature in the copper dissolving tank 1 is 60 to 70 degrees. The temperature will decrease when it flows from the second pipe 5 to the first heat exchange unit 7 and the dirty liquid tank 2, and then flows from the third pipe 6 to the second heat exchange unit 8 and the clean liquid tank 3, and the temperature is further reduced. Therefore, the temperature of the first heat exchange unit 7 is higher than that of the second heat exchange unit 8, and the temperature of the pure water in the first pipe 4 gradually increases when it flows from the second heat exchange unit 8 to the first heat exchange unit 7.

[0023] The second heat exchange unit 8 is connected to the first pipe 4 and the third pipe 6 respectively to achieve heat exchange between the first pipe 4 and the second pipe 5. The second heat exchange unit 8 can be a flat plate heat exchanger, a shell and tube heat exchanger, a spiral plate heat exchanger, a plate-fin heat exchanger, a hot plate heat exchanger, etc. In this embodiment, the second heat exchange unit 8 is a shell and tube heat exchanger.

[0024] Preferably, the energy-saving copper dissolving tank device further includes a heater 9, which is connected to the first pipe 4 and is used to heat the liquid in the first pipe 4. Further preferably, the position of the heater 9 on the first pipe 4 is located between the first heat exchange unit 7 and the copper dissolving tank 1, so that the heater 9 heats the liquid flowing into the copper dissolving tank 1 from the first heat exchange unit 7, so that its temperature is further increased. Further preferably, the energy-saving copper dissolving tank device further includes a temperature sensor 13, which is arranged in the copper dissolving tank 1 and is used to detect the temperature of the liquid in the copper dissolving tank 1. Generally, the temperature sensor 13 is arranged near the first pipe 4, and the power of the heater 9 is adjusted according to the temperature of the liquid in the copper dissolving tank 1, so that the temperature of the liquid in the copper dissolving tank 1 reaches a suitable reaction temperature.

[0025] Preferably, the energy-saving copper dissolving tank device further comprises a foil raw machine 14, which is connected to the clean liquid tank 3 by a pipeline so that the high-purity copper sulfate solution flowing in from the clean liquid tank 3 undergoes an electrochemical reaction to generate copper foil.

[0026] In summary, in the energy-saving copper dissolving tank device provided by the utility model, the liquid in the copper dissolving tank 1 flows from the first heat exchange unit 7 to the second heat exchange unit 8, and the temperature gradually decreases, and the excess heat of the solution after the reaction is recovered multiple times. The temperature of the liquid in the first pipeline 4 is increased by passing through the second heat exchange unit 8 and the first heat exchange unit 7, and the liquid entering the copper dissolving tank 1 is preheated, reducing the heat required to heat the liquid to the reaction temperature, thereby greatly saving energy consumption.

[0027] The above specific implementation methods of the utility model do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. An energy-saving copper dissolving tank device, characterized in that: It includes a copper dissolving tank, a dirty liquid tank, a clean liquid tank, a first pipeline, a second pipeline, a third pipeline, a first heat exchange unit and a second heat exchange unit, wherein: The copper dissolving tank is connected to the first pipeline, and the copper dissolving tank is connected to the waste liquid tank by the second pipeline; The dirty liquid tank and the clean liquid tank are connected by the third pipe. The first heat exchange unit is connected to the first pipeline and the second pipeline respectively to achieve heat exchange between the first pipeline and the second pipeline; The second heat exchange unit is connected to the first pipeline and the third pipeline respectively to achieve heat exchange between the first pipeline and the second pipeline.

2. The energy-saving copper dissolving tank device according to claim 1 is characterized in that: The first heat exchange unit is located on the first pipeline between the second heat exchange unit and the copper melting tank.

3. The energy-saving copper dissolving tank device according to claim 1 is characterized in that: The energy-saving copper dissolving tank device also includes a heater, and the heater is connected to the first pipeline.

4. The energy-saving copper dissolving tank device according to claim 3 is characterized in that: The heater is located on the first pipeline between the first heat exchange unit and the copper melting tank.

5. The energy-saving copper dissolving tank device according to claim 1 is characterized in that: The energy-saving copper dissolving tank device further comprises a filtering unit, and the filtering unit is connected to the third pipeline.

6. The energy-saving copper dissolving tank device according to claim 5 is characterized in that: The filter unit is a diatomaceous earth filter.

7. The energy-saving copper dissolving tank device according to claim 1 is characterized in that: The energy-saving copper dissolving tank device also includes a waste liquid pump, and the waste liquid pump is connected to the second pipeline.

8. The energy-saving copper dissolving tank device according to claim 1 is characterized in that: The energy-saving copper dissolving tank device also includes a clean liquid pump, and the clean liquid pump is connected to the third pipeline.

9. The energy-saving copper dissolving tank device according to claim 1 is characterized in that: The energy-saving copper dissolving tank device further comprises a temperature sensor, and the temperature sensor is arranged in the copper dissolving tank.

10. The energy-saving copper dissolving tank device according to claim 1 is characterized in that: The energy-saving copper dissolving tank device also includes a foil raw machine, and the foil raw machine is connected to the clean liquid tank pipeline.

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