CN-224226838-U - Recycling treatment system for copper-containing wastewater in copper foil production

Abstract

The utility model relates to a recycling treatment system for copper-containing wastewater in copper foil production, which comprises a pretreatment unit, a membrane separation unit, a nanofiltration unit, a concentrated water recycling unit and a cyclone electrolysis unit which are sequentially connected, wherein the membrane separation unit comprises a multistage permeable membrane device, the nanofiltration unit comprises a multistage nanofiltration membrane device, the copper-containing wastewater in copper foil production is pretreated by the pretreatment unit and then separated by the membrane separation unit to obtain copper-containing concentrated water, and then the copper-containing concentrated water is filtered by the nanofiltration unit and then electrolyzed by the cyclone electrolysis unit. The utility model realizes the efficient recovery of copper resources and the near zero emission of wastewater, and has good application prospect.

Inventors

• LI XIAOLIN
• GONG KAIKAI
• ZHANG LEI
• WANG PENG
• HU JIAN

Assignees

• 九江德福科技股份有限公司
• 九江琥珀新材料有限公司

Dates

Publication Date

20260512

Application Date

20250521

Claims (6)

1. 1. A recycling treatment system for copper-containing wastewater in copper foil production is characterized by comprising a pretreatment unit, a membrane separation unit, a nanofiltration unit, a concentrated water recycling unit and a cyclone electrolysis unit which are sequentially connected, wherein the membrane separation unit comprises a multistage permeable membrane device, the nanofiltration unit comprises a multistage nanofiltration membrane device, the copper-containing wastewater in copper foil production is pretreated by the pretreatment unit and then separated by the membrane separation unit to obtain copper-containing concentrated water, and then the copper-containing concentrated water is filtered by the nanofiltration unit and then electrolyzed by the cyclone electrolysis unit.
2. 2. The recycling system for copper-containing wastewater in copper foil production according to claim 1, wherein the pretreatment unit comprises a bag filter.
3. 3. The recycling system for copper-containing wastewater produced by copper foil production according to claim 1, wherein the multistage permeable membrane device adopts a coiled polyamide membrane, and the pressure resistance of a membrane shell is more than or equal to 3MPa.
4. 4. The recycling system for copper-containing wastewater produced by copper foil production according to claim 1, wherein the multistage nanofiltration membrane device adopts a DK8040F nanofiltration membrane with a molecular weight cut-off of 200-300Da.
5. 5. The recycling system for copper-containing wastewater produced by copper foil production according to claim 1, wherein the concentrated water recycling unit is provided with an intelligent diverter valve.
6. 6. The recycling system for copper-containing wastewater produced by copper foil production according to claim 1, wherein a spiral-flow electrolytic tank in the spiral-flow electrolytic unit adopts a coated titanium anode and a stainless steel cathode.

Description

Recycling treatment system for copper-containing wastewater in copper foil production Technical Field The utility model belongs to the technical field of industrial wastewater treatment, and particularly relates to a recycling treatment system for copper-containing wastewater in copper foil production. Background The conventional RO treatment concentrated water directly discharges to cause copper resource waste, and the requirement that copper is less than or equal to 0.5mg/L in the emission standard of industrial pollutants of copper, nickel and cobalt (GB 25467-2010) cannot be met, a single chemical precipitation method generates a large amount of copper-containing sludge (hazardous waste code: HW 22), the disposal cost is high, and the current efficiency is lower than 40% when the copper low-concentration wastewater (Cu 2+ <500 mg/L) is directly electrolyzed and extracted, so that the energy consumption is too high. Therefore, there is a need to develop a new treatment method for copper-containing wastewater. Disclosure of Invention The utility model aims to solve the technical problem of providing a recycling treatment system for copper-containing wastewater in copper foil production, which realizes efficient recovery of copper resources and near zero emission of wastewater. The utility model provides a recycling treatment system for copper-containing wastewater in copper foil production, which comprises a pretreatment unit, a membrane separation unit, a nanofiltration unit, a concentrated water recycling unit and a cyclone electrolysis unit which are sequentially connected, wherein the membrane separation unit comprises a multistage permeable membrane device, the nanofiltration unit comprises a multistage nanofiltration membrane device, the copper-containing wastewater in copper foil production is pretreated by the pretreatment unit and then separated by the membrane separation unit to obtain copper-containing concentrated water, and then the copper-containing concentrated water is filtered by the nanofiltration unit and then electrolyzed by the cyclone electrolysis unit. Preferably, the pretreatment unit comprises a bag filter. Preferably, the multistage permeable membrane device adopts a coiled polyamide membrane, and the pressure resistance of a membrane shell is more than or equal to 3MPa. Preferably, the multistage nanofiltration membrane device adopts a DK8040F nanofiltration membrane, and the molecular weight cut-off is 200-300Da. Preferably, the concentrated water recycling unit is provided with an intelligent diverter valve. Preferably, a spiral-flow electrolytic tank in the spiral-flow electrolytic unit adopts a coating titanium anode and a stainless steel cathode, and the spiral-flow electrolytic process parameters are that the pulse power supply frequency is 50-100Hz, the current density is 400-450A/m < 2 >, and the temperature is 30-35 ℃. Advantageous effects (1) The method is characterized in that the concentration of electrolytic water inlet copper is stabilized at 25-30g/L by the synergistic concentration of multistage RO and multistage nanofiltration, the RO is used for preferentially intercepting free Cu 2+, and the nanofiltration is used for concentrating complex copper (such as Cu-EDTA) in a targeted manner. (2) The film combination of the utility model improves the copper concentration of the electrolytic feed liquid by 4-6 times, and improves the current efficiency from 38% to 72%. (3) The concentrated water recycling unit reduces load fluctuation of the electrolysis unit based on the shunt control of copper concentration real-time feedback, and simultaneously realizes dynamic balance of copper ion concentration of the sewage tank (130-170 mg/L is maintained). (4) The utility model realizes the efficient recovery of copper resources and the near zero emission of wastewater, and has good application prospect. Drawings FIG. 1 is a schematic diagram of a recycling treatment system, wherein the recycling treatment system comprises a 1-pretreatment unit, a 2-membrane separation unit, a 3-nanofiltration unit, a 4-cyclone electrolysis unit and a 5-concentrated water recycling unit. FIG. 2 is a flow chart of the recycling treatment of copper-containing wastewater of the present utility model. Detailed Description The utility model will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present utility model and are not intended to limit the scope of the present utility model. Furthermore, it should be understood that various changes and modifications can be made by one skilled in the art after reading the teachings of the present utility model, and such equivalents are intended to fall within the scope of the utility model as defined in the appended claims. Example 1 As shown in FIG. 1, the embodiment provides a recycling treatment system for copper-containing wastewater in copper foil production, which comprises