Device for increasing liquid supply flow velocity of crude foil engine

Abstract

The invention relates to the technical field of electrolytic copper foil production, and discloses a device for increasing the liquid supply flow speed of a crude foil engine and a crude foil engine tank body, the crude foil engine tank body is formed by splicing a plurality of anode plates, a liquid feeding opening is fixedly connected to the bottom of the crude foil engine tank body, a flow increasing plate is fixedly connected to the top of the liquid feeding opening, and the flow increasing plate is fixedly connected to the top of the crude foil engine tank body. And a plurality of round holes are formed in the flow increasing plate. Preferably, the cross section of the flow increasing plate is of a U-shaped groove-shaped structure, and the flow increasing plate can be conveniently and stably clamped at the position of the liquid feeding opening through the U-shaped groove-shaped structure. Under the condition that the total liquid supply flow is not changed, the flow increasing plate is used for converting the electrolyte into the high-speed jet flow, and the mass transfer efficiency of a key electrolysis area is improved, so that the formation of poor copper spots under high current is effectively inhibited, meanwhile, copper nodules generated due to overlarge total flow are avoided, and the production cost is reduced on the premise that the product quality is guaranteed. And the production current and the productivity of the crude foil engine are obviously improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrolytic copper foil production, in particular to a device for increasing the liquid flow rate of a green foil machine. BACKGROUND

[0002] In the production process of electrolytic copper foil, the green foil machine is the core production equipment. A typical green foil machine includes a green foil machine tank body, an anode plate is arranged in the tank body, and a liquid inlet is arranged for electrolyte supply. The liquid inlet is usually located between the anode plates, and the lower part of the liquid inlet is connected with an adjusting valve and a liquid supply pipeline for conveying copper sulfate electrolyte to the electrolysis area.

[0003] In order to improve production efficiency, the industry generally adopts the method of increasing the production current of the green foil machine. However, in the prior art, when the production current is increased to a high level (for example, more than 35KA), the electrolyte update speed in the key electrolysis area between the cathode roller and the anode plate will be insufficient. The lag of this update speed causes the cathode surface to be unable to replenish copper ions in time, thereby forming irregular copper-deficient spot defects on the surface of the produced copper foil.

[0004] To improve the copper-deficient spot problem, a direct response method is to increase the total liquid supply flow rate of the liquid supply pipeline. Although increasing the total flow rate can alleviate the occurrence of copper-deficient spots to a certain extent, excessive liquid supply flow rate will disturb the overall flow field stability in the tank body, thereby causing a new technical problem, that is, irregular copper tumors on the surface of the copper foil. Therefore, the prior art is in a technical dilemma: increasing the production current to pursue high yield will cause copper-deficient spots, and increasing the total flow rate to solve the copper-deficient spot problem will cause irregular copper tumors. This technical constraint relationship seriously affects the further improvement of the quality of the copper foil product and the production capacity. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a device for increasing the liquid flow rate of a green foil machine, which solves the problem that the electrolyte update speed between the cathode roller and the anode plate is insufficient when the production current of the existing green foil machine is increased to improve the yield, resulting in copper-deficient spot defects on the surface of the copper foil; and the problem that directly increasing the total liquid supply flow rate will cause new quality problems of irregular copper tumors.

[0006] To achieve the above purpose, the present application realizes the technical scheme as follows: a device for increasing the liquid flow rate of a green foil machine, comprising a green foil machine tank body, the green foil machine tank body is composed of a plurality of anode plates, the bottom of the green foil machine tank body is fixedly connected with a liquid inlet, the top of the liquid inlet is fixedly connected with a flow increasing plate, and a plurality of circular holes are formed in the inside of the flow increasing plate.

[0007] Preferably, the cross section of the flow increasing plate is in a U-shaped groove structure, which facilitates the stable clamping of the flow increasing plate at the position of the liquid inlet.

[0008] Preferably, the flow booster plate is made of HTPVC material. This material has the characteristics of high temperature resistance and electrolyte corrosion resistance, which can ensure the structural stability and service life of the device in the working environment of the foil production machine.

[0009] Preferably, the flow booster plate has a length of 1385 mm, and its U-shaped groove structure has an outer edge width of 21 mm and an inner edge width of 19 mm. This size design matches the width of the liquid inlet, allowing the flow booster plate to be installed tightly.

[0010] Preferably, the plurality of circular holes are evenly distributed along the length of the flow booster plate. This distribution helps to form a uniform high-speed liquid flow over the entire length of the anode plate, thereby ensuring the quality consistency of the entire copper foil.

[0011] Preferably, the diameter of the circular holes is 6 mm, and the spacing between adjacent circular holes is 5 mm. This combination of hole diameter and spacing is an optimized configuration for improving flow velocity and ensuring flow uniformity while maintaining structural strength.

[0012] Preferably, the upper liquid inlet is internally fixedly connected with several adjusting valves.

[0013] Preferably, the flow booster plate is pressed and fixed to the liquid inlet by the anode plates on both sides, or the flow booster plate is spot-welded to the bottom of the anode plate at the liquid inlet. Both of these are reliable installation and fixing methods.

[0014] This invention provides a device for increasing the liquid supply flow rate of a foil-making machine. It has the following beneficial effects:

[0015] 1. This invention utilizes a flow booster plate with multiple circular holes installed at the upper liquid inlet of the foil-making machine tank. Under the condition of a constant total liquid supply flow, this converts the electrolyte flowing out of the upper liquid inlet into multiple high-speed jets. These high-speed jets enhance the liquid renewal and mass transfer efficiency in the area between the cathode roller and the anode plate, ensuring a sufficient supply of copper ions to the cathode surface under high production current, thereby suppressing the formation of copper-poor spots.

[0016] 2. This invention increases the local flow velocity through the throttling effect of the flow booster plate, rather than increasing the total liquid supply flow rate of the liquid supply pipeline. Therefore, while solving the problem of copper spot deficiency, it maintains the stability of the overall flow field in the foil forming machine tank, avoids turbulence caused by excessive total flow rate, and thus prevents the formation of irregular copper nodules, ensuring the surface quality of the copper foil.

[0017] 3. This invention effectively solves the quality defects of copper-poor spots and irregular copper nodules caused by high current density, enabling the foil-making machine to operate stably at higher production currents (from 35KA to 50KA) while ensuring product quality. The efficiency of electrolytic production is directly related to the production current; therefore, the increase in production current directly leads to an increase in the output of the foil-making process, thereby improving production capacity. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the foil-making machine tank of the present invention;

[0019] Figure 2 This is a schematic diagram of the liquid inlet of the present invention;

[0020] Figure 3 This is a schematic diagram of the flow booster plate of the present invention.

[0021] The components include: 1. foil production tank; 2. anode plate; 3. liquid inlet; 4. adjusting valve; 5. flow booster plate; and 6. round hole. Detailed Implementation

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] To better understand the present invention, the above content will be described in detail below with reference to specific embodiments.

[0024] Please see the appendix Figure 1 - Appendix Figure 3 This invention provides a device for increasing the liquid supply flow rate of a foil-making machine. The foil-making machine tank 1 contains multiple anode plates 2, each consisting of a front and rear section. Between the anode plates 2, an upper liquid inlet 3 for supplying electrolyte is formed. Multiple adjusting valves 4 are connected to the lower part of the upper liquid inlet 3. These valves regulate the liquid supply flow rate entering the tank. The core component of the device for increasing the liquid supply flow rate of the foil-making machine provided in this invention is a flow booster plate 5. The flow booster plate 5 is installed at the upper liquid inlet 3 and is used to increase the local velocity of the electrolyte flowing out of the upper liquid inlet 3 without changing the total liquid supply flow rate supplied by the adjusting valves 4. The flow booster plate 5 has multiple circular holes 6. The electrolyte, via the adjusting valves 4 and the upper liquid inlet 3, finally flows out through the multiple circular holes 6 on the flow booster plate 5 and is sprayed into the electrolysis area within the foil-making machine.

[0025] The flow booster plate 5 has a U-shaped trough structure in its cross-section. This structure allows the flow booster plate 5 to fit snugly against the structure of the liquid inlet 3 during installation, facilitating installation and positioning. The flow booster plate 5 is made of HTPVC (high-temperature resistant polyvinyl chloride) in one piece. This material was chosen because it possesses structural stability and corrosion resistance under the working temperature of the foil-making process and the chemical environment of copper sulfate electrolyte, ensuring the service life of the device. The detailed dimensions of the flow booster plate 5 are designed to fit the foil-making machine tank 1. Its plate thickness is 3mm, and its overall length is 1385mm to cover the entire length of the liquid inlet 3. The outer edge width of its U-shaped trough structure is set to 2... The inner edge width is set to 19mm, and the outer edge width of 21mm is matched with the original width (22mm) of the upper liquid port 3, so that a tight fit can be formed after installation. Multiple round holes 6 are opened on the flow booster plate 5. These round holes 6 are the final channels for the electrolyte to flow out from the upper liquid port 3. Multiple round holes 6 are evenly arranged along the length direction of the flow booster plate 5. This distribution method is intended to ensure that the high-speed flowing electrolyte can act evenly on the entire effective length of the anode plate 2, thereby ensuring the consistency of the entire copper foil in the production process. The diameter of each round hole 6 is 6mm, and the center distance or edge interval between any two adjacent round holes 6 is 5mm. In addition, in order to reduce the energy loss of electrolyte flowing through the circular holes 6 and ensure the smoothness of the jet, the opening edges of all the circular holes 6 are processed to achieve a smooth and residue-free process standard. The installation position of the booster plate 5 in the foil production tank 1 is clear. It is placed directly at the opening of the liquid inlet 3 and is pressed and fixed by the anode plates 2 on both sides. After the anode plates 2 are installed in place, their bottom structure can apply pressure to the outer edge of the booster plate 5, thereby stably fixing the booster plate 5 in the working position.

[0026] Working principle: During the operation of the foil-making machine, the electrolyte volume flow rate (e.g., 50m³ / h) delivered to the upper liquid port 3 via the liquid supply pipeline and adjusting valve 4 is... 3 / h) is a constant.

[0027] After the flow booster plate 5 is installed, the only channel for the electrolyte to flow out becomes multiple independent circular holes 6 opened on the flow booster plate 5. The total cross-sectional area of ​​all the circular holes 6 is much smaller than the cross-sectional area of ​​the original liquid outlet 3. Since the total volumetric flow rate remains constant, according to the relationship between the fluid flow rate, velocity and cross-sectional area in the pipe, when the liquid flows through the circular holes 6 with a significantly reduced total cross-sectional area, its outlet velocity will inevitably increase accordingly and substantially.

[0028] Thus, the original low-velocity liquid flow is transformed into multiple uniformly distributed, high-speed liquid jets. These high-speed jets directly impact and act on the region between the cathode roller and anode plate 2, which is the most critical part of the electrolytic reaction. This forced convection greatly enhances the mass transfer efficiency in this region, ensuring that when the foil-making machine operates at a high production current (e.g., 50KA), the rapidly consumed copper ions can be replenished from the bulk solution in a timely and high-rate manner, thereby maintaining a stable ion concentration near the cathode surface and effectively suppressing the formation of copper-deficient spot defects caused by localized copper deficiency.

[0029] Meanwhile, the technical solution of this invention reconstructs the local flow pattern at the upper liquid inlet 3 while maintaining the total liquid supply flow rate unchanged. Since the total amount of electrolyte entering the foil production machine tank 1 does not increase, the macroscopic flow field inside the tank will not be greatly disturbed, avoiding turbulence problems caused by excessive total flow rate, and therefore, irregular copper nodules will not be generated.

[0030] In summary, this invention, by altering the local fluid structure, achieves an increase in the electrolyte renewal rate in critical areas without increasing the total electrolyte supply. This synergistically solves the two major technical challenges of copper-poor spots and copper nodules under high-current production, making it possible to significantly increase the production current and capacity of the foil-making process while ensuring copper foil quality. In a specific experimental verification, after installing this device, the foil-making machine maintained a electrolyte flow rate of 50m³ / h. 3 At a rate of / h, the production current steadily increased from 35KA to 50KA. The produced copper foil was tested and found to have no copper-poor spots or irregular copper nodules on the surface, resulting in a nearly 40% increase in production capacity.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for increasing the liquid supply flow rate of a foil-making machine, characterized in that, It includes a foil production tank (1), which is composed of multiple anode plates (2) spliced ​​together. A liquid inlet (3) is fixedly connected to the bottom of the foil production tank (1), and a flow booster plate (5) is fixedly connected to the top of the liquid inlet (3). Several round holes (6) are opened inside the flow booster plate (5).

2. The device for increasing the liquid supply flow rate of a foil-making machine according to claim 1, characterized in that, The flow booster plate (5) has a U-shaped groove structure in cross section.

3. The device for increasing the liquid supply flow rate of a foil-making machine according to claim 1, characterized in that, The flow booster plate (5) is made of HTPVC material.

4. The device for increasing the liquid supply flow rate of a foil-making machine according to claim 1, characterized in that, The thickness of the flow booster plate (5) is 3mm.

5. The device for increasing the liquid supply flow rate of a foil-making machine according to claim 1, characterized in that, The length of the booster plate (5) is 1385mm, and the outer edge width of its U-shaped groove structure is 21mm, and the inner edge width is 19mm.

6. The device for increasing the liquid supply flow rate of a foil-making machine according to claim 1, characterized in that, The diameter of the circular hole (6) is 6 mm.

7. The device for increasing the liquid supply flow rate of a foil-making machine according to claim 1, characterized in that, The circular holes (6) are evenly distributed along the length of the flow booster plate (5), and the interval between adjacent circular holes (6) is 5 mm.

8. The device for increasing the liquid supply flow rate of a foil-making machine according to claim 1, characterized in that, The upper liquid inlet (3) is internally fixedly connected with several adjusting valves (4).

9. The device for increasing the liquid supply flow rate of a foil-making machine according to claim 1, characterized in that, The flow booster plate (5) is pressed and fixed to the top of the liquid inlet (3) by the anode plates (2) on both sides.

10. The device for increasing the liquid supply flow rate of a foil-making machine according to claim 1, characterized in that, The flow booster plate (5) is spot-welded to the bottom of the anode plate (2) and located at the top of the liquid inlet (3).

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