A multi-stage electrolytic copper foil anti-oxidation solution preparation device

Abstract

The utility model discloses a multistage electrolytic copper foil anti -oxidation liquid preparation device, including filter, liquid storage tank and stirring tank, filter includes two stages, and the filtering accuracy of the filter of rear stage is greater than the former stage, the former stage includes main bag type filter and spare bag type filter, and the latter group includes main precision filter and spare precision filter, main precision filter is connected with main bag type filter and forms main filter channel, and spare precision filter connects spare bag type filter and forms spare filter channel, main bag type filter and spare bag type filter are connected with liquid storage tank, and main precision filter and spare precision filter are connected with plate heat exchanger, and the output liquid medicine is formed through plate heat exchanger. Such solved the problem of traditional liquid preparation system impurity control loss, temperature fluctuation and low reliability, can realize the preparation process of high -precision electrolytic copper foil production's anti -oxidation liquid, can improve the stability and reliability of preparation process, and then promote copper foil surface quality and production efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary production equipment for electrolytic copper foil, and in particular to an anti-oxidation solution preparation device for electrolytic copper foil. Background Technology

[0002] Antioxidant solution preparation equipment is used for the precise preparation, impurity filtration, temperature control, and stable delivery of antioxidant solutions during the electrolytic copper foil production process. In the industrial production of electrolytic copper foil, the quality of the antioxidant solution preparation directly determines the antioxidant performance of the copper foil after surface treatment. Existing solution preparation systems have the following problems:

[0003] 1. Lack of impurity control: Usually, it is a single-stage filtration with a filtration accuracy of 1μm. Particles ≥1μm in the solution can easily clog the downstream spraying system, resulting in defects such as scratches, padding, and spots on the copper foil surface.

[0004] 2. Lack of temperature control function: The anti-oxidation solution lacks temperature control during reaction and storage. Temperature fluctuations will affect the stability of the solution components and the uniformity of film formation.

[0005] 3. Insufficient reliability: The filter unit and power components have no backup configuration. In case of failure, the entire machine must be shut down for maintenance, which will cause production line interruption.

[0006] 4. Poor mixing uniformity: Traditional stirring and single-stage circulation methods are insufficient to achieve high-precision homogenization of the drug solution components, with concentration fluctuations exceeding ±5%;

[0007] 5. Limitations in corrosion resistance: Metal parts in contact with the liquid are easily corroded, resulting in high maintenance frequency and high costs. Summary of the Invention

[0008] This invention addresses the shortcomings of existing technologies by providing a multi-stage electrolytic copper foil anti-oxidation solution preparation device with a more rational structural design, multi-stage filtration function, precise temperature control, redundancy backup, and corrosion resistance.

[0009] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a multi-stage electrolytic copper foil anti-oxidation solution preparation device, comprising a filter, a storage tank, and a stirring tank. The storage tank and the stirring tank are connected by a pipeline, and the filter is connected to the storage tank by a pipeline. The storage tank and the stirring tank are provided with a circulation pipeline, which is connected to a main power system consisting of a main ball valve and a main circulation pump. The filter comprises two stages, with the filtration accuracy of the later stage filter being greater than that of the earlier stage filter. The earlier stage includes a main bag filter and a backup bag filter, and the later stage includes a main precision filter and a backup precision filter. The main precision filter and the main bag filter are connected to form a main filtration channel, and the backup precision filter is connected to the backup bag filter to form a backup filtration channel. The main bag filter and the backup bag filter are connected to the storage tank, and the main precision filter and the backup precision filter are connected to a plate heat exchanger, through which the solution is output.

[0010] Furthermore, the filtration accuracy of the main bag filter and the backup bag filter is 1μm, and the filtration accuracy of the main precision filter and the backup precision filter is 0.5μm; the housing of each filter is made of 316L stainless steel, and the inner wall of the housing is lined with polytetrafluoroethylene, and the filter uses a polypropylene meltblown felt filter element; the main filter channel and the backup filter channel are switched between main and backup through a three-way reversing valve.

[0011] Furthermore, the plate heat exchanger adopts a fully welded stainless steel frame structure, the heat exchange plates are made of TA2 titanium alloy, and the surface is coated with polytetrafluoroethylene. The heat exchange area is not less than 1 m². The plate heat exchanger has a temperature sensor and an electric regulating valve to monitor and adjust the liquid temperature to the set value ±1℃ in real time.

[0012] Furthermore, the inner wall of the storage tank is coated with a polytetrafluoroethylene anti-corrosion layer, and a drain port and a circulation return interface are provided at the bottom, while an inlet and a breather valve for the storage tank are provided at the top; the drain port is connected to a drain pipe for the storage tank, and the circulation return interface is connected to a return pipe.

[0013] Furthermore, the mixing tank is equipped with a double helical agitator, and a variable frequency speed-regulating agitator motor is installed at the top of the mixing tank. The speed range of the agitator motor is 100~400rpm. The double helical agitator is connected to the agitator motor. A liquid level sensor is installed at the top of the mixing tank, and an overflow pipe is connected to the upper part. A drain valve is installed at the bottom, and the drain valve is connected to the storage tank through the mixing tank drain pipe.

[0014] Furthermore, it also includes a backup power system consisting of a backup ball valve and a backup circulating pump. The backup power system is connected in parallel with the main power system and connected to the storage tank through a return pipeline. Both the main ball valve and the backup ball valve are PTFE-lined ball valves.

[0015] Furthermore, the inlet at the top of the storage tank is connected to a storage tank circulation pipe, which branches into two lines that are connected to the main circulation pump and the standby circulation pump, respectively; the main bag filter and the standby bag filter are connected in parallel to a delivery pipe, which is connected to the storage tank circulation pipe.

[0016] Furthermore, the storage tank circulation pipe is also connected to the mixing tank circulation pipe, which is connected to the mixing tank from the top.

[0017] Furthermore, the plate heat exchanger is connected to the machine platform conveying pipeline, which is equipped with a pressure sensor and an electromagnetic flow meter.

[0018] Furthermore, the plate heat exchanger is equipped with bypass pipes at its inlet and outlet.

[0019] This invention has the following advantages over existing liquid preparation devices:

[0020] 1. Multi-stage filtration ensures the cleanliness of the medicine solution: The bag filter with a filtration accuracy of 1μm and the precision filter with a filtration accuracy of 0.5μm are connected in series, and with the corrosion-resistant filter element material, particulate impurities in the medicine solution can be effectively removed, reducing the frequency of downstream nozzle clogging by 80% and the surface defect rate of copper foil by 65%.

[0021] It can achieve precise temperature control and improve the stability of the medicine solution: the plate heat exchanger can achieve ±1℃ temperature control, which avoids the decomposition or precipitation of medicine solution components due to temperature fluctuations, and ensures the uniformity and density of the anti-oxidation film, increasing the film qualification rate to over 99%.

[0022] The system's reliability is enhanced through redundancy: both the circulating pump set and the filter unit are equipped with backup configurations. Combined with the bypass design of the plate heat exchanger, the system's mean time between failures (MTBF) is ≥3000 hours, the frequency of downtime maintenance is reduced by 75%, and the continuity of production is significantly improved.

[0023] The combination of double-helix stirring and inter-tank circulation in the mixing tank controls concentration fluctuations within ±1.5%; key contact components are lined with perfluorinated materials, extending service life to four times that of traditional components and reducing maintenance costs by 50%.

[0024] By integrating multi-parameter sensors for temperature, pressure, and flow, it supports automatic temperature control, fault alarms, and seamless switching of backup modules, reducing manual intervention and improving operational efficiency by 40%. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model.

[0026] In the diagram, 1 is the machine conveying pipeline, 2 is the main precision filter, 3 is the main bag filter, 4 is the liquid storage tank drain pipeline, 5 is the liquid storage tank, 6 is the liquid storage tank breather valve, 7 is the mixing tank, 8 is the liquid level sensor, 9 is the mixing motor, 10 is the overflow pipeline, 11 is the drain valve, 12 is the mixing tank drain pipeline, 13 is the mixing tank circulation pipeline, 14 is the liquid storage tank circulation pipeline, 15 is the main ball valve, 16 is the main circulation pump, 17 is the conveying pipeline, 18 is the spare ball valve, 19 is the spare circulation pump, 20 is the spare bag filter, 21 is the spare precision filter, 22 is the bypass pipeline, 23 is the plate heat exchanger, and 24 is the return pipeline. Detailed Implementation

[0027] In this embodiment, refer to Figure 1 The multi-stage electrolytic copper foil anti-oxidation solution preparation device includes a filter, a storage tank 5, and a stirring tank 7. The storage tank 5 and the stirring tank 7 are connected by a pipeline, and the filter is connected to the storage tank 5 by a pipeline. The storage tank 5 and the stirring tank 7 are provided with a circulation pipeline, which is connected to a main power system consisting of a main ball valve 15 and a main circulation pump 16. The filter includes two stages, with the filtration accuracy of the later stage filter being greater than that of the earlier stage filter. The earlier stage includes a main bag filter 3 and a backup bag filter 20, and the later stage includes a main precision filter 2 and a backup precision filter 21. The main precision filter 2 and the main bag filter 3 are connected to form a main filtration channel, and the backup precision filter 21 is connected to the backup bag filter 20 to form a backup filtration channel. The main bag filter 3 and the backup bag filter 20 are connected to the storage tank 5, and the main precision filter 2 and the backup precision filter 21 are connected to a plate heat exchanger 23, through which the solution is output to the electrolysis process.

[0028] The main bag filter 3 and the standby bag filter 20 have a filtration accuracy of 1μm, while the main precision filter 2 and the standby precision filter 21 have a filtration accuracy of 0.5μm. Each filter housing is made of 316L stainless steel, with a polytetrafluoroethylene (PTFE) lining on the inner wall. The filters use polypropylene meltblown felt filter elements. The main and standby filtration channels are switched via a three-way reversing valve. When the differential pressure sensor in the main filtration channel detects a pressure drop ≥0.35MPa, the three-way reversing valve automatically switches to the standby filtration channel. The main filtration channel allows for online filter element replacement with a switching time ≤5 seconds, ensuring continuous filtration.

[0029] The plate heat exchanger 23 adopts a fully welded stainless steel frame structure, with heat exchange plates made of TA2 titanium alloy and coated with polytetrafluoroethylene. The heat exchange area is not less than 1 m². The plate heat exchanger 23 is equipped with a temperature sensor and an electric regulating valve to monitor and adjust the liquid temperature to the set value ±1℃ in real time. For example, after the uniformly mixed liquid is discharged through the main (backup) precision filter, it passes through the plate heat exchanger 23 for temperature adjustment (heating or cooling). The temperature control system automatically adjusts the flow rate of the heat medium / cooling medium according to the process requirements to ensure that the liquid temperature is stable at 30±1℃.

[0030] The inner wall of the storage tank 5 is coated with a polytetrafluoroethylene anti-corrosion layer. A drain port and a circulation return interface are located at the bottom, while an inlet and a breather valve 6 are located at the top. The drain port is connected to a drain pipe 4, and the circulation return interface is connected to a return pipe 24. The storage tank 5 has a capacity of 4 m³, sufficient to meet the simultaneous continuous production requirements of four foil-making machines.

[0031] The mixing tank 7 is equipped with a double helical stirring paddle, and a variable frequency speed-regulating stirring motor 9 is installed at the top of the mixing tank. The speed range of the stirring motor 9 is 100~400rpm. The double helical stirring paddle is connected to the stirring motor 9. A liquid level sensor 8 is installed at the top of the mixing tank 7, and an overflow pipe 10 is connected to the upper part. A drain valve 11 is installed at the bottom, and the drain valve 11 is connected to the storage tank 5 through the mixing tank drain pipe 12.

[0032] It also includes a backup power system consisting of a backup ball valve 18 and a backup circulating pump 19. The backup power system is connected in parallel with the main power system and connected to the storage tank 5 through a return pipe 24. Both the main ball valve 15 and the backup ball valve 18 are PTFE-lined ball valves. The rated flow rate of the main circulating pump 16 and the backup circulating pump 19 is 5 m³ / h, and the head is 30 m. In the event of a failure of the main circulating pump 16, the backup circulating pump 19 will automatically start via a pressure sensor, with a switching time of ≤3 seconds to avoid production line interruption.

[0033] The liquid inlet at the top of the storage tank 5 is connected to the storage tank circulation pipe 14. The storage tank circulation pipe 14 branches into two lines, which are connected to the main circulation pump 16 and the standby circulation pump 19 respectively. The main bag filter 3 and the standby bag filter 20 are connected in parallel to a conveying pipe 17, which is connected to the storage tank circulation pipe 14.

[0034] The storage tank circulation pipe 14 is also connected to the stirring tank circulation pipe 13, which is connected to the stirring tank 7 from the top.

[0035] Plate heat exchanger 23 is connected to machine platform conveying pipe 1 for outputting liquid to the electrolysis process. Machine platform conveying pipe 1 is equipped with pressure sensor and electromagnetic flow meter.

[0036] The plate heat exchanger 23 is equipped with bypass pipes 22 at its inlet and outlet. When the plate heat exchanger 23 needs maintenance, it can be switched to the bypass pipes 22 to ensure that the system does not shut down.

[0037] Working principle

[0038] 1. Solution preparation and initial mixing stage

[0039] According to the formula ratio, inject the drug solution of each component into the mixing tank 7, start the stirring motor 9 for premixing, and at the same time turn on the main circulation pump 16 to form an initial "stirring-circulation" loop between the mixing tank 7 and the storage tank 5. The mixing time is calculated according to the concentration of the drug solution (15~20 minutes).

[0040] Filtration and temperature control stages

[0041] The mixed medicine solution enters the main filtration channel to remove particulate impurities. Specifically, it passes through the main (backup) bag filter 3 to remove particulate impurities ≥1 μm, and then through the main (backup) precision filter 2 to remove fine particles ≥0.5 μm, with a filtration efficiency ≥99%. Then it flows into the plate heat exchanger 23 to achieve temperature control, ensuring that the temperature and concentration of the medicine solution are stable (temperature fluctuation ±1℃, concentration fluctuation ±1.5%).

[0042] Delivery and standby phase

[0043] After filtration and temperature control, the liquid medicine is transported to the electrolysis process through the machine's conveying pipeline 1. The pressure sensor provides real-time feedback and adjusts the pump speed to maintain a constant flow rate (4±0.5 m³ / h). When the main circulation pump 16 or the main filtration channel fails, the backup module automatically starts operating, and the control system issues a fault alarm, supporting online maintenance.

[0044] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A multi-stage electrolytic copper foil anti-oxidation solution preparation device, comprising a filter, a storage tank, and a stirring tank, wherein the storage tank and the stirring tank are connected by a pipeline, the filter and the storage tank are connected by a pipeline, and the storage tank and the stirring tank are provided with a circulation pipeline, the circulation pipeline being connected to a main power system consisting of a main ball valve and a main circulation pump, characterized in that: The filter comprises two stages, with the filtration accuracy of the later stage being greater than that of the earlier stage. The earlier stage includes a main bag filter and a backup bag filter, while the later stage includes a main precision filter and a backup precision filter. The main precision filter is connected to the main bag filter to form a main filtration channel, and the backup precision filter is connected to the backup bag filter to form a backup filtration channel. The main bag filter and the backup bag filter are connected to a storage tank, and the main precision filter and the backup precision filter are connected to a plate heat exchanger, through which the drug solution is output.

2. The multi-stage electrolytic copper foil anti-oxidation solution preparation device according to claim 1, characterized in that: The main bag filter and the backup bag filter have a filtration accuracy of 1μm, and the main precision filter and the backup precision filter have a filtration accuracy of 0.5μm. The housing of each filter is made of 316L stainless steel, and the inner wall of the housing is lined with polytetrafluoroethylene. The filter uses a polypropylene meltblown felt filter element. The main filter channel and the backup filter channel are switched between main and backup through a three-way reversing valve.

3. The multi-stage electrolytic copper foil anti-oxidation solution preparation device according to claim 1, characterized in that: The plate heat exchanger adopts a fully welded stainless steel frame structure, and the heat exchange plates are made of TA2 titanium alloy with a polytetrafluoroethylene coating on the surface. The heat exchange area is not less than 1 m². The plate heat exchanger is equipped with a temperature sensor and an electric regulating valve to monitor and adjust the liquid temperature to the set value ±1℃ in real time.

4. The multi-stage electrolytic copper foil anti-oxidation solution preparation device according to claim 1, characterized in that: The inner wall of the storage tank is coated with a polytetrafluoroethylene anti-corrosion layer. The bottom is equipped with a drain port and a circulation return interface, and the top is equipped with a liquid inlet and a breather valve for the storage tank. The drain port is connected to a liquid tank drain pipe, and the circulation return interface is connected to a return pipe.

5. The multi-stage electrolytic copper foil anti-oxidation solution preparation device according to claim 1, characterized in that: The mixing tank is equipped with a double helical agitator, and a variable frequency speed-regulating agitator motor is installed at the top of the mixing tank. The speed range of the agitator motor is 100~400rpm. The double helical agitator is connected to the agitator motor. A liquid level sensor is installed at the top of the mixing tank, and an overflow pipe is connected to the upper part. A drain valve is installed at the bottom, and the drain valve is connected to the storage tank through the mixing tank drain pipe.

6. The multi-stage electrolytic copper foil anti-oxidation solution preparation device according to claim 4, characterized in that: It also includes a backup power system consisting of a backup ball valve and a backup circulating pump. The backup power system is connected in parallel with the main power system and connected to the liquid storage tank through a return pipeline. Both the main ball valve and the backup ball valve are PTFE-lined ball valves.

7. The multi-stage electrolytic copper foil anti-oxidation solution preparation device according to claim 6, characterized in that: The liquid inlet at the top of the storage tank is connected to a storage tank circulation pipe, which branches into two lines that are connected to the main circulation pump and the standby circulation pump, respectively. The main bag filter and the standby bag filter are connected in parallel to a delivery pipe, which is connected to the storage tank circulation pipe.

8. The multi-stage electrolytic copper foil anti-oxidation solution preparation device according to claim 7, characterized in that: The storage tank circulation pipeline is also connected to the mixing tank circulation pipeline, which is connected to the mixing tank from the top.

9. The multi-stage electrolytic copper foil anti-oxidation solution preparation device according to claim 1, characterized in that: The plate heat exchanger is connected to the machine platform conveying pipeline, which is equipped with a pressure sensor and an electromagnetic flow meter.

10. The multi-stage electrolytic copper foil anti-oxidation solution preparation device according to claim 1, characterized in that: The plate heat exchanger has bypass pipes at its inlet and outlet.

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