Electrolytic copper foil waste liquid copper recycling device

Abstract

The utility model discloses an electrolytic copper foil waste liquid copper recycling device which comprises a first-stage reverse osmosis mechanism, a second-stage reverse osmosis mechanism, a third-stage reverse osmosis mechanism, a third-stage reverse osmosis mechanism and a fourth-stage reverse osmosis mechanism, the second-stage reverse osmosis mechanism is used for separating the first-stage low-concentration liquid into pure water and concentrated water; the first-stage concentrated water reverse osmosis mechanism is used for separating the first-stage high-concentration liquid into a second-stage low-concentration liquid and a second-stage high-concentration liquid; the second-stage concentrated water reverse osmosis mechanism is used for separating the second-stage high-concentration liquid into a high-concentration copper ion solution and a second-stage low-concentration liquid. The device has the beneficial effects that multi-layer treatment and multi-stage filtration are realized, copper ions in the copper-containing waste liquid are extracted in a high-concentration and maximum-utilization manner through four procedures, the loss of the copper ions is reduced, and the production cost is reduced; after recycling, the burden of waste liquid treatment can be reduced, the cost is reduced, and meanwhile, the method is relatively environment-friendly.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology in electrolytic copper foil production, and specifically to a copper recycling device for waste liquid from electrolytic copper foil production. Background Technology

[0002] Electrolytic copper foil is a crucial material in the manufacture of copper-clad laminates (CCL), printed circuit boards (PCBs), and lithium-ion batteries. With the rapid development of the global economy and emerging industries such as electronics, communications, and electric vehicles, the electrolytic copper foil market has expanded rapidly. Consequently, electrolytic copper foil manufacturers have gradually increased their production capacity, leading to fierce market competition. In this context, high-quality, low-priced copper foil is more attractive to customers. Copper foil manufacturers must reduce production costs to stand out in the market; therefore, cost reduction and efficiency improvement in the electrolytic copper foil production process are particularly important. The general manufacturing process for electrolytic copper foil is raw material processing → copper dissolution → foil production → slitting. First, a large amount of copper sulfate electrolyte is formed in the copper dissolution process. Then, in the foil production process, copper ions are deposited on the cathode roller through high-current electrolysis of the copper sulfate solution to form copper foil. The waste liquid generated in the copper dissolution process contains a large amount of copper ions. Currently, this waste liquid is directly discharged after treatment, resulting in the underutilization of copper raw materials, causing losses and resource waste. Utility Model Content

[0003] The problem this invention aims to solve is that the direct discharge of copper smelting waste liquid leads to the underutilization of copper raw materials. To address this, an electrolytic copper foil waste liquid copper recycling device is provided.

[0004] The technical solution of this utility model is: a copper recycling device for electrolytic copper foil waste liquid, comprising: a primary reverse osmosis mechanism, which separates copper-containing wastewater into a primary low-concentration liquid and a primary high-concentration liquid; a secondary reverse osmosis mechanism, which separates the primary low-concentration liquid into pure water and concentrated water; a primary concentrated water reverse osmosis mechanism, which separates the primary high-concentration liquid into a secondary low-concentration liquid and a secondary high-concentration liquid; and a secondary concentrated water reverse osmosis mechanism, which separates the secondary high-concentration liquid into a high-concentration copper ion solution and a secondary low-concentration liquid.

[0005] The first-stage reverse osmosis mechanism described in the above scheme includes: a booster pump that pumps out copper-containing wastewater; a scale inhibitor preparation tank that adds scale inhibitor to the pumped copper-containing wastewater; an alkali addition reaction tank that adds alkali to the copper-containing wastewater passing through the scale inhibitor preparation tank; an activated carbon filter that filters the copper-containing wastewater passing through the alkali addition reaction tank; a first-stage high-pressure pump that provides high pressure to the copper-containing wastewater passing through the activated carbon filter; and a first-stage reverse osmosis membrane that separates the copper-containing wastewater passing through the first-stage high-pressure pump into a first-stage low-concentration liquid and a first-stage high-concentration liquid.

[0006] The improvement to the above solution is that a primary filter for fine filtration of copper-containing wastewater is connected between the activated carbon filter and the primary high-pressure pump.

[0007] The secondary reverse osmosis mechanism described in the above scheme includes: a primary reverse osmosis permeate tank for storing primary low-concentration liquid; a secondary low-concentration liquid filter for filtering the primary low-concentration liquid output from the primary reverse osmosis permeate tank after alkali treatment; a secondary high-pressure pump for providing high pressure to the primary low-concentration liquid passing through the secondary low-concentration filter; and a secondary reverse osmosis membrane for separating copper-containing wastewater from the secondary high-pressure pump into pure water and concentrated water.

[0008] The primary concentrate reverse osmosis mechanism described in the above scheme includes: a primary reverse osmosis concentrate tank for storing primary high-concentration liquid; a secondary high-concentration liquid filter for filtering the primary high-concentration liquid output from the primary reverse osmosis concentrate tank; a primary concentrate high-pressure pump for providing high pressure to the primary high-concentration liquid passing through the secondary high-concentration liquid filter; and a tertiary reverse osmosis membrane for separating the primary high-concentration liquid passing through the primary concentrate high-pressure pump into secondary low-concentration liquid and secondary high-concentration liquid.

[0009] The secondary concentrate reverse osmosis mechanism described in the above scheme includes: a secondary reverse osmosis concentrate tank for storing secondary high-concentration liquid; a tertiary high-concentration liquid filter for filtering the secondary high-concentration liquid output from the secondary reverse osmosis concentrate tank; a secondary concentrate high-pressure pump for providing high pressure to the secondary high-concentration liquid after passing through the tertiary high-concentration liquid filter; and a quaternary reverse osmosis membrane for separating the secondary high-concentration liquid after passing through the secondary concentrate high-pressure pump to obtain a solution containing high concentrations of copper ions.

[0010] The beneficial effects of this invention are multi-layer processing and multi-stage filtration. Through four processes, copper ions in copper-containing waste liquid are concentrated to maximize their utilization and extraction, reducing the loss of copper ions and lowering production costs. After recycling, the burden of waste liquid treatment can be reduced, costs can be lowered, and it is also more environmentally friendly. Attached Figure Description

[0011] Figure 1 This is a flowchart of the present invention;

[0012] Figure 2 This is a schematic diagram of the first-stage reverse osmosis mechanism of this utility model;

[0013] Figure 3 This is a schematic diagram of the two-stage reverse osmosis mechanism of this utility model;

[0014] Figure 4 This is a schematic diagram of the primary concentrate reverse osmosis mechanism of this utility model;

[0015] Figure 5 This is a schematic diagram of the secondary concentrate reverse osmosis mechanism of this utility model;

[0016] In the diagram, 1. Booster pump, 2. Antiscalant preparation tank, 3. Alkali addition reaction tank, 4. Activated carbon filter, 5. First-stage high-pressure pump, 6. First-stage reverse osmosis membrane, 7. First-stage filter, 8. First-stage reverse osmosis permeate tank, 9. Second-stage low-concentration liquid filter, 10. Second-stage high-pressure pump, 11. Second-stage reverse osmosis membrane, 12. First-stage reverse osmosis concentrate tank, 13. Second-stage high-concentration liquid filter, 14. First-stage concentrate high-pressure pump, 15. Third-stage reverse osmosis membrane, 16. Second-stage reverse osmosis concentrate tank, 17. Third-stage high-concentration liquid filter, 18. Second-stage concentrate high-pressure pump, 19. Fourth-stage reverse osmosis membrane. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] like Figure 1 As shown, a copper recycling device for electrolytic copper foil wastewater includes: a primary reverse osmosis unit for separating copper-containing wastewater into a primary low-concentration liquid and a primary high-concentration liquid; a secondary reverse osmosis unit for separating the primary low-concentration liquid into pure water and concentrated water; a primary concentrated water reverse osmosis unit for separating the primary high-concentration liquid into a secondary low-concentration liquid and a secondary high-concentration liquid; and a secondary concentrated water reverse osmosis unit for separating the secondary high-concentration liquid into a high-concentration copper ion solution and a secondary low-concentration liquid.

[0019] like Figure 2 As shown, the primary reverse osmosis unit includes: a booster pump 1, which pumps out copper-containing wastewater; a scale inhibitor preparation tank 2, which adds scale inhibitor to the pumped copper-containing wastewater; an alkali addition reaction tank 3, which adds alkali to the copper-containing wastewater passing through the scale inhibitor preparation tank; an activated carbon filter 4, which filters the copper-containing wastewater passing through the alkali addition reaction tank; a primary high-pressure pump 5, which provides high pressure to the copper-containing wastewater passing through the activated carbon filter; and a primary reverse osmosis membrane 6, which separates the copper-containing wastewater passing through the primary high-pressure pump into a primary low-concentration liquid and a primary high-concentration liquid.

[0020] As a preferred example, a primary filter 7 for fine filtration of copper-containing wastewater is connected between the activated carbon filter and the primary high-pressure pump.

[0021] Copper-containing wastewater is transported to a collection tank, then pumped by a booster pump 1 to a scale inhibitor preparation tank 2 and an alkali addition reaction tank 3 to remove impurity ions from the wastewater. The wastewater is then sent to an activated carbon filter 4 for coarse filtration, and then to a primary filter 7 for fine filtration. The filtered solution is then passed through a primary high-pressure pump 5 to provide higher pressure to the pretreated wastewater, which then passes through a primary reverse osmosis membrane 6, thereby separating the low-concentration solution from the high-concentration solution. The high-concentration solution is sent to the primary reverse osmosis concentrate tank, and the low-concentration solution is sent to the primary reverse osmosis permeate tank.

[0022] like Figure 3 As shown, the secondary reverse osmosis mechanism includes: a primary reverse osmosis permeate tank 8, which stores primary low-concentration liquid; a secondary low-concentration liquid filter 9, which filters the primary low-concentration liquid output from the primary reverse osmosis permeate tank after alkali treatment; a secondary high-pressure pump 10, which provides high pressure to the primary low-concentration liquid passing through the secondary low-concentration filter; and a secondary reverse osmosis membrane 11, which separates copper-containing wastewater from the secondary high-pressure pump into pure water and concentrated water.

[0023] The low-concentration solution in the primary reverse osmosis permeate tank is treated with alkali and then sent to the secondary low-concentration solution filter. After filtration, the solution is subjected to higher pressure by the secondary high-pressure pump so that it can pass through the secondary reverse osmosis membrane, further separating the pure water and the concentrated water. The pure water is sent to the intermediate water tank in the pure water zone, and the concentrated water is sent to the collection tank.

[0024] like Figure 4 As shown, the primary concentrate reverse osmosis mechanism includes: a primary reverse osmosis concentrate tank 12, which stores primary high-concentration liquid; a secondary high-concentration liquid filter 13, which filters the primary high-concentration liquid output from the primary reverse osmosis concentrate tank; a primary concentrate high-pressure pump 14, which provides high pressure to the primary high-concentration liquid after passing through the secondary high-concentration liquid filter; and a tertiary reverse osmosis membrane 15, which separates the primary high-concentration liquid after passing through the primary concentrate high-pressure pump into secondary low-concentration liquid and secondary high-concentration liquid.

[0025] The high-concentration solution from the first-stage reverse osmosis concentrate tank is then transported to the second-stage high-concentration solution filter for filtration. The solution is then subjected to higher pressure by the first-stage concentrate high-pressure pump and passed through the third-stage reverse osmosis membrane to obtain the second-stage high-concentration solution. The second-stage high-concentration solution is then transported to the second-stage reverse osmosis concentrate tank, while the low-concentration solution is returned to the first-stage reverse osmosis concentrate tank.

[0026] like Figure 5As shown, the secondary concentrate reverse osmosis mechanism includes: a secondary reverse osmosis concentrate tank 16, which stores the secondary high-concentration solution; a tertiary high-concentration solution filter 17, which filters the secondary high-concentration solution output from the secondary reverse osmosis concentrate tank; a secondary concentrate high-pressure pump 18, which provides high pressure to the secondary high-concentration solution after passing through the tertiary high-concentration solution filter; and a quaternary reverse osmosis membrane 19, which separates the secondary high-concentration solution after passing through the secondary concentrate high-pressure pump to obtain a solution containing high-concentration copper ions.

[0027] The high-concentration solution from the secondary reverse osmosis concentrate tank is transferred to the tertiary high-concentration solution filter for filtration. Then, a secondary high-pressure pump applies higher pressure to the solution, allowing it to pass through the quaternary reverse osmosis membrane, further yielding a solution containing a high concentration of copper ions. This high-concentration copper ion solution is transferred to the copper concentrate tank, while the low-concentration solution is returned to the primary reverse osmosis concentrate tank. Preferably, two secondary high-pressure pumps are used to provide higher pressure.

[0028] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A copper recycling device for electrolytic copper foil waste liquid, characterized in that: include: A primary reverse osmosis unit, wherein the primary reverse osmosis unit is used to separate copper-containing wastewater into a primary low-concentration liquid and a primary high-concentration liquid; The secondary reverse osmosis unit is used to separate the primary low-concentration liquid into pure water and concentrated water; the primary concentrated water reverse osmosis unit is used to separate the primary high-concentration liquid into secondary low-concentration liquid and secondary high-concentration liquid; the secondary concentrated water reverse osmosis unit is used to separate the secondary high-concentration liquid into high-concentration copper ion solution and secondary low-concentration liquid.

2. The copper recycling device for electrolytic copper foil waste liquid as described in claim 1, characterized in that: The primary reverse osmosis system includes: a booster pump (1) for pumping out copper-containing wastewater; a scale inhibitor preparation tank (2) for adding scale inhibitor to the pumped copper-containing wastewater; an alkali addition reaction tank (3) for adding alkali to the copper-containing wastewater passing through the scale inhibitor preparation tank; an activated carbon filter (4) for filtering the copper-containing wastewater passing through the alkali addition reaction tank; a primary high-pressure pump (5) for providing high pressure to the copper-containing wastewater passing through the activated carbon filter; and a primary reverse osmosis membrane (6) for separating the copper-containing wastewater passing through the primary high-pressure pump into a primary low-concentration liquid and a primary high-concentration liquid.

3. The copper recycling device for electrolytic copper foil waste liquid as described in claim 2, characterized in that: A primary filter (7) for fine filtration of copper-containing wastewater is connected between the activated carbon filter and the primary high-pressure pump.

4. The copper recycling device for electrolytic copper foil waste liquid as described in claim 1, characterized in that: The secondary reverse osmosis system includes: a primary reverse osmosis permeate tank (8) for storing primary low-concentration liquid; a secondary low-concentration liquid filter (9) for filtering the primary low-concentration liquid output from the primary reverse osmosis permeate tank after alkali treatment; a secondary high-pressure pump (10) for providing high pressure to the primary low-concentration liquid after passing through the secondary low-concentration filter; and a secondary reverse osmosis membrane (11) for separating copper-containing wastewater from the secondary high-pressure pump into pure water and concentrated water.

5. The copper recycling device for electrolytic copper foil waste liquid as described in claim 1, characterized in that: The primary concentrate reverse osmosis mechanism includes: a primary reverse osmosis concentrate tank (12) for storing primary high-concentration liquid; a secondary high-concentration liquid filter (13) for filtering the primary high-concentration liquid output from the primary reverse osmosis concentrate tank; a primary concentrate high-pressure pump (14) for providing high pressure to the primary high-concentration liquid after passing through the secondary high-concentration liquid filter; and a tertiary reverse osmosis membrane (15) for separating the primary high-concentration liquid after passing through the primary concentrate high-pressure pump into secondary low-concentration liquid and secondary high-concentration liquid.

6. The copper recycling device for electrolytic copper foil waste liquid as described in claim 1, characterized in that: The secondary concentrate reverse osmosis mechanism includes: a secondary reverse osmosis concentrate tank (16) for storing secondary high-concentration liquid; a tertiary high-concentration liquid filter (17) for filtering the secondary high-concentration liquid output from the secondary reverse osmosis concentrate tank; a secondary concentrate high-pressure pump (18) for providing high pressure to the secondary high-concentration liquid after passing through the tertiary high-concentration liquid filter; and a quaternary reverse osmosis membrane (19) for separating the secondary high-concentration liquid after passing through the secondary concentrate high-pressure pump to obtain a solution containing high-concentration copper ions.

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