Energy-saving system for novel formation foil production process

Abstract

The application discloses a novel energy-saving system for production of formed foil, which is used for power distribution and formation treatment of strip-shaped aluminum foil and comprises a rack, a power distribution conveying roller rotatably installed on the rack, a water boiling tank and a formation tank arranged on the inner side of the rack, a water spraying tank arranged between the power distribution conveying roller and the water boiling tank on the inner side of the rack and located obliquely above the power distribution conveying roller. In the application, high-purity water for formation is used as cooling water, so that the strip-shaped aluminum foil does not need to be additionally provided with cooling water, thereby reducing the consumption of cooling water. The high-purity water for formation is used as cooling water, so that the cooling water is heated while the inclined section of the strip-shaped aluminum foil to be cooled after being heated by direct current is cooled, the heated cooling water is directly introduced into the water boiling tank and mixed with high-purity water for hydrating film, the temperature of the high-purity water for hydrating film is increased, and the electric heating energy consumption of the water boiling tank for the high-purity water for hydrating film is reduced.

Description

Technical Field

[0001] This invention relates to aluminum foil formation technology, specifically to a novel energy-saving system for aluminum foil production processes. Background Technology

[0002] Chemically formed aluminum foil is aluminum foil produced through a chemical forming process. An insulating aluminum oxide film can be formed on the aluminum foil. The existing chemically formed aluminum foil processing process is as follows: foil generation → electric roller → boiling in water → first formation → second formation → third formation → fourth formation → fifth formation → sixth formation... However, the technical problems are: the cooling water consumption is large, reaching 500L / h, and when the aluminum foil passes through the electric conveyor roller, sparking phenomena that are not conducive to safe production are likely to occur. The aluminum foil is also prone to wrinkling and bending during the processing, which reduces its strength. Summary of the Invention

[0003] The purpose of this invention is to provide a novel energy-saving system for the production process of electrolytic foil, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A novel energy-saving system for forming aluminum foil production process is used for the electrostatic formation treatment of strip aluminum foil. It includes a frame with an electrostatic conveyor roller rotatably mounted on it. A boiling tank and a formation tank are located inside the frame. A water spray tank is positioned between the electrostatic conveyor roller and the boiling tank, diagonally above the electrostatic conveyor roller. A first limiting roller is installed inside the boiling tank, which circulates and accumulates high-purity water for hydration film formation. A second limiting roller is installed inside the formation tank. A water supply pipe penetrates the top of the outer wall of the formation tank, which circulates and accumulates high-purity water for formation. The water spray tank... A water inlet pipe is provided through the end face of the water tank, a vent hole is provided through the top of the water tank, and multiple water spray pipes are evenly provided through the bottom of the water tank. A connecting pipe is provided through the bottom of the outer wall of the formation tank. The outlet end of the connecting pipe is connected to the water inlet pipe. A flow meter and a water pump are installed on the connecting pipe. The system also includes a DC power supply. The positive terminal of the DC power supply is connected to the power distribution conveyor roller. The power distribution conveyor roller is grounded. The negative terminal of the DC power supply is connected to two negative potential discharge plates. The two negative potential discharge plates are located inside the formation tank. A first guide roller, a second guide roller, a third guide roller, and a fourth guide roller are installed on the frame.

[0006] As a further embodiment of the present invention: the power distribution conveyor roller is located between the first guide roller and the water spray tank, the second guide roller and the third guide roller are located between the boiling tank and the formation tank, the formation tank is located between the third guide roller and the fourth guide roller, and the second guide roller is located between the boiling tank and the third guide roller.

[0007] As a further aspect of the present invention: the power distribution conveying roller sequentially contacts and passes around the first guide roller, the power distribution conveying roller, the first limiting roller, the second guide roller, the third guide roller, the second limiting roller, and the fourth guide roller.

[0008] As a further aspect of the present invention: the strip aluminum foil passes through high-purity water for hydration film, the strip aluminum foil passes through high-purity water for formation, and the strip aluminum foil passes between the two negative potential discharge electrode plates.

[0009] As a further aspect of the present invention, the power distribution conveyor roller is made of pure silver.

[0010] As a further aspect of the present invention: the included angle α of the arc surface formed by the contact between the strip aluminum foil and the power distribution conveyor roller is less than 180°.

[0011] As a further aspect of the present invention: the portion of the strip aluminum foil located between the power distribution conveyor roller and the water boiling tank that detaches from the power distribution conveyor roller and does not enter the high-purity water for the hydration film is a tilted section to be cooled, and the backward tilt angle β of the tilted section to be cooled with respect to the horizontal plane is less than 90°.

[0012] As a further embodiment of the present invention: the water spray pipe is located directly above the top of the inclined section to be cooled.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. In this invention, by using high-purity water for chemical formation as cooling water, it is possible to eliminate the need for additional cooling water to be provided for the strip aluminum foil, thereby reducing the consumption of cooling water. Furthermore, using high-purity water for chemical formation as cooling water can simultaneously cool the inclined section of the strip aluminum foil that has been heated by DC electricity, while raising the temperature of the cooling water. After the heated cooling water is directly introduced into the boiling tank and mixed with the high-purity water for hydration membrane, the temperature of the high-purity water for hydration membrane can be increased, thereby reducing the electric heating energy consumption of the high-purity water for hydration membrane in the boiling tank, achieving the purpose of energy saving and emission reduction.

[0015] 2. In this invention, the relatively constant air pressure inside the water spray tank can maintain a relatively constant flow rate of high-temperature cooling water flowing out of the water spray pipe, thereby achieving the technical objective of uniformly spraying water to cool the inclined section of the strip aluminum foil and further suppressing the wrinkling of the strip aluminum foil.

[0016] 3. The silver-made power distribution conveyor roller has a lower electrical resistance. Even when the conductive area between the strip aluminum foil and the power distribution conveyor roller is small, the silver-made power distribution conveyor roller can still significantly reduce the current density at the contact point between the strip aluminum foil and the power distribution conveyor roller, thereby reducing the electrothermal temperature of the strip aluminum foil, thus avoiding arcing and improving the safety of production operations. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the energy-saving system for a new type of electrolytic foil production process.

[0018] Figure 2 This is a schematic diagram of the water spray tank in an energy-saving system for a novel electrolytic foil production process.

[0019] Figure 3 This diagram shows the positional relationship between the water spray tank and the power distribution conveyor roller in an energy-saving system for a novel electrolytic foil production process.

[0020] The components include: frame 1, power distribution conveyor roller 2, boiling tank 3, first limiting roller 4, high-purity water for hydration film 5, formation tank 6, high-purity water for formation 7, second limiting roller 8, negative potential discharge electrode plate 9, water supply pipe 10, water spray tank 11, water inlet pipe 12, vent hole 13, water spray pipe 14, connecting pipe 15, flow meter 16, water pump 17, first guide roller 18, second guide roller 19, third guide roller 20, fourth guide roller 21, strip aluminum foil 22, inclined section to be cooled 23, and water collection tank 24. Detailed Implementation

[0021] The technical solutions of 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.

[0022] Please see Figures 1-3In this embodiment of the invention, a novel energy-saving system for forming aluminum foil production process is used to perform electro-forming treatment on strip aluminum foil 22. It includes a frame 1, on which an electro-conveying roller 2 is rotatably mounted. A boiling tank 3 and a forming tank 6 are arranged inside the frame 1. An electric heating device is installed inside the boiling tank 3. A water spray tank 11 is located inside the frame 1, between the electro-conveying roller 2 and the boiling tank 3, and is positioned diagonally above the electro-conveying roller 2. A first limiting roller 4 is installed inside the boiling tank 3, and high-purity water 5 for hydration film is circulated and stored inside the boiling tank 3. A second limiting roller 8 is installed inside the forming tank 6. A water supply pipe 10 is inserted through the top of the outer wall of the forming tank 6, and high-purity water 7 for forming is circulated and stored inside the forming tank 6. A water inlet pipe 12 is inserted through the end face of the water spray tank 11, and a vent hole 1 is opened through the top of the water spray tank 11. 3. Multiple water spraying pipes 14 are evenly distributed through the bottom of the water spraying tank 11. A connecting pipe 15 is distributed through the bottom of the outer wall of the formation tank 6. The outlet end of the connecting pipe 15 is connected to the inlet pipe 12. A flow meter 16 and a water pump 17 are installed on the connecting pipe 15. The system also includes a DC power supply. The positive terminal of the DC power supply is connected to the power distribution conveyor roller 2. The power distribution conveyor roller 2 is grounded. The negative terminal of the DC power supply is connected to two negative potential discharge plates 9. The two negative potential discharge plates 9 are located inside the formation tank 6. A first guide roller 18, a second guide roller 19, a third guide roller 20, and a fourth guide roller 21 are installed on the frame 1. A water collection tank 24 is provided on the inner side of the frame 1. The water collection tank 24 is located below the water boiling tank 3 and the formation tank 6. A supporting grid is provided at the top opening of the water collection tank 24. The bottom of the water boiling tank 3 and the formation tank 6 are fixedly connected to the supporting grid.

[0023] The power distribution conveyor roller 2 is located between the first guide roller 18 and the water spray tank 11. The second guide roller 19 and the third guide roller 20 are located between the boiling tank 3 and the formation tank 6. The formation tank 6 is located between the third guide roller 20 and the fourth guide roller 21. The second guide roller 19 is located between the boiling tank 3 and the third guide roller 20. The installation height of the second guide roller 19, the third guide roller 20, and the fourth guide roller 21 on the frame 1 is greater than the top opening height of the boiling tank 3 and the formation tank 6.

[0024] The power distribution conveyor roller 2 sequentially contacts and passes over the first guide roller 18, the power distribution conveyor roller 2, the first limiting roller 4, the second guide roller 19, the third guide roller 20, the second limiting roller 8, and the fourth guide roller 21.

[0025] The strip aluminum foil 22 passes through the high-purity water 5 for hydration film, the strip aluminum foil 22 passes through the high-purity water 7 for formation, and the strip aluminum foil 22 passes between the two negative potential discharge electrode plates 9.

[0026] The power distribution conveyor roller 2 is made of pure silver.

[0027] Because silver has lower electrical resistance, the silver-made power distribution roller 2 can still significantly reduce the current density at the contact area between the strip aluminum foil 22 and the power distribution roller 2, even when the conductive area between them is small, thereby reducing the electrothermal temperature of the strip aluminum foil 22.

[0028] The included angle α of the arc surface formed by the contact between the strip aluminum foil 22 and the power distribution conveyor roller 2 is less than 180°.

[0029] The portion of the strip aluminum foil 22 located between the power distribution conveyor roller 2 and the water boiling tank 3 that detaches from the power distribution conveyor roller 2 and does not enter the high-purity water 5 for the hydration film is the inclined section 23 to be cooled, and the backward tilt angle β of the inclined section 23 to be cooled with respect to the horizontal plane is <90°.

[0030] The water spray pipe 14 is located directly above the top of the inclined section 23 to be cooled.

[0031] The working principle of this invention is:

[0032] During operation, when the hydration membrane is heated to a suitable temperature of 94°C or higher with high-purity water 5, the hydration membrane required for electrolysis in the formation tank 6 is formed on the surface of the strip aluminum foil 22, which is slowly passed through the boiling water tank 3 and immersed in the high-purity water 5. The hydration membrane fully covers the strip aluminum foil 22. When the strip aluminum foil 22 slowly passes through the formation tank 6, through the principle of electrochemical process, the high-purity water 7 for formation in the formation tank 6 undergoes an oxidation-reduction reaction with the strip aluminum foil 22. The strip aluminum foil 22 and the high-purity water 7 for formation are electrolyzed into aluminum oxide and hydrogen. The insulating film formed by aluminum oxide is densely and uniformly fixedly covered on the surface of the high-purity water 7 for formation, thus completing the electrochemical formation process.

[0033] In this invention, when the strip aluminum foil 22 moves, the water pump 17 continuously delivers the high-purity water 7 for formation, which is at a temperature of about 55°C and accumulated in the formation tank 6, to the water spray tank 11 through the connecting pipe 15 (the high-purity water 7 for formation is quite pure and can be used as the high-purity water 5 for hydration film). The high-temperature cooling water (derived from the high-purity water 7 for formation) entering the water spray tank 11 has a temperature of 55-60°C and flows out from the water spray pipes 14 evenly distributed at the bottom of the water spray tank 11 under the action of gravity, forming a cooling water flow. The cooling water flows onto the inclined section 23 to be cooled. Most of the cooling water continues to flow downward from the top of the inclined section 23 to the high-purity water 5 for hydration film accumulated in the boiling tank 3 under the action of gravity. A very small portion of the cooling water that fails to flow into the boiling tank 3 is collected by the water collection tank 24 outside the boiling tank 3. During the process of the cooling water flowing downward on the inclined section 23 to be cooled, Because silver has lower resistance, the silver-made power distribution roller 2 can still significantly reduce the current density at the contact area between the strip aluminum foil 22 and the power distribution roller 2, even when the conductive area of ​​the strip aluminum foil 22 and the power distribution roller 2 is small. This reduces the electrothermal temperature of the strip aluminum foil 22. The temperature of the strip aluminum foil 22 loaded with DC current is significantly higher than the temperature of the cooling water flowing from the water outlet onto the strip aluminum foil 22. Therefore, the cooling water flows downward and comes into full contact with the inclined section 23 to be cooled, resulting in heat exchange. The cooling water is heated by the inclined section 23 to be cooled, and its temperature rises accordingly. It then flows into the boiling tank 3 and mixes with the high-purity water 5 for the hydration film. The temperature of the high-purity water 5 for the hydration film in the boiling tank 3 is then controlled at around 94°C or above. In this way, there is no need to heat or cool the cooling water at 55°C-60°C.

[0034] High-purity water 7 used for chemical formation at a temperature of approximately 55-60℃ is used as high-temperature cooling water to replace the room-temperature cooling water provided separately to the inclined section 23 to be cooled in the traditional technology. It is used to cool the inclined section 23 of the strip aluminum foil 22 to be cooled (Note: the temperature of the strip aluminum foil 22 heated by DC is much higher than 60℃). It makes full use of the heat of the inclined section 23 of the strip aluminum foil 22 to be cooled, which is heated by DC, to directly heat the high-temperature cooling water with a phase temperature that is relatively higher than that of the room-temperature cooling water, which can significantly reduce water consumption.

[0035] The inclined section 23 to be cooled is kept cooled by cooling water at a temperature of 55℃-60℃, which can further effectively pre-energize and cool the strip aluminum foil 22 to suppress wrinkles or bends of the strip aluminum foil 22 when cooled by cooling water, maintain the uniformity of the surface flatness of the strip aluminum foil 22, and at the same time fully recover the excess heat energy of the strip aluminum foil 22 to heat the high-temperature cooling water 5 flowing into the hydration film, reduce the temperature difference between the cooling water and the hydration film high-purity water 5 of the boiling tank 3, and reduce the electric heating energy consumption of the boiling tank 3 for the hydration film high-purity water 5.

[0036] Since the vent 13 at the top of the water tank 11 allows the water tank 11 to be connected to the atmosphere, the air pressure inside the water tank 11 is equal to the atmospheric pressure. Because the atmospheric pressure remains relatively constant, the air pressure inside the water tank 11 is also relatively constant. The flow rate of the high-purity water 7 pumped to the water tank 11 by the water pump 17 is adjusted so that the liquid level in the water tank 11 is above the outlet of the water inlet pipe 12.

[0037] When the air pressure inside the water tank 11 remains relatively constant, the greater the flow rate of the water pump 17, the higher the liquid level inside the water tank 11, and the greater the flow rate of the high-temperature cooling water flowing out of the water pipe 14; the smaller the flow rate of the water pump 17, the lower the liquid level, and the smaller the water flow rate of the water pipe 14.

[0038] The flow meter 16 is used to measure and display the current flow rate of the high-purity water 7 used in the formation process through the water pump and connecting pipe 15 in real time. The relatively constant air pressure in the water spray tank 11 can keep the flow rate of the high-temperature cooling water flowing out of the water spray pipe 14 relatively constant, thereby achieving the technical purpose of uniformly spraying water to cool the inclined section 23 of the strip aluminum foil 22 and further suppressing the wrinkling of the strip aluminum foil 22.

[0039] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A novel energy-saving system for forming aluminum foil production process, used for the electrical distribution forming treatment of strip aluminum foil (22), comprising a frame (1), characterized in that: A power distribution conveyor roller (2) is rotatably mounted on the frame (1). A boiling tank (3) and a formation tank (6) are arranged on the inner side of the frame (1). A water spraying tank (11) is arranged on the inner side of the frame (1) between the power distribution conveyor roller (2) and the boiling tank (3). The water spraying tank (11) is located diagonally above the power distribution conveyor roller (2). A first limiting roller (4) is arranged inside the boiling tank (3). High-purity water (5) for hydration membrane is circulated and stored inside the boiling tank (3). A second limiting roller (8) is arranged inside the formation tank (6). A water supply pipe (10) is provided through the top of the outer wall of the formation tank (6). High-purity water (7) for formation is circulated and stored inside the formation tank (6). A water inlet pipe (12) is provided through the end face of the water spraying tank (11). The top of the 1) is provided with a ventilation hole (13), and the bottom of the water tank (11) is provided with multiple water pipes (14) evenly. The bottom of the outer wall of the formation tank (6) is provided with a connecting pipe (15). The outlet end of the connecting pipe (15) is connected to the inlet pipe (12). A flow meter (16) and a water pump (17) are installed on the connecting pipe (15). The system also includes a DC power supply. The positive terminal of the DC power supply is connected to the power distribution conveyor roller (2). The power distribution conveyor roller (2) is grounded. The negative terminal of the DC power supply is connected to two negative potential discharge plates (9). The two negative potential discharge plates (9) are located in the formation tank (6). The frame (1) is equipped with a first guide roller (18), a second guide roller (19), a third guide roller (20), and a fourth guide roller (21).

2. The energy-saving system for the novel electrolytic foil production process according to claim 1, characterized in that: The power distribution transmission roller (2) is located between the first guide roller (18) and the water spray tank (11), the second guide roller (19) and the third guide roller (20) are located between the boiling tank (3) and the formation tank (6), the formation tank (6) is located between the third guide roller (20) and the fourth guide roller (21), and the second guide roller (19) is located between the boiling tank (3) and the third guide roller (20).

3. The energy-saving system for the novel electrolytic foil production process according to claim 2, characterized in that: The power distribution conveyor roller (2) sequentially contacts and passes over the first guide roller (18), the power distribution conveyor roller (2), the first limiting roller (4), the second guide roller (19), the third guide roller (20), the second limiting roller (8), and the fourth guide roller (21).

4. The energy-saving system for the novel electrolytic foil production process according to claim 3, characterized in that: The strip aluminum foil (22) passes through the high-purity water (5) for hydration film, the strip aluminum foil (22) passes through the high-purity water (7) for formation, and the strip aluminum foil (22) passes between the two negative potential discharge electrode plates (9).

5. The energy-saving system for the novel electrolytic foil production process according to claim 1, characterized in that: The power distribution conveyor roller (2) is made of pure silver.

6. The energy-saving system for the novel electrolytic foil production process according to claim 1, characterized in that: The included angle α of the arc surface formed by the contact between the strip aluminum foil (22) and the power distribution conveyor roller (2) is less than 180°.

7. The energy-saving system for the novel electrolytic foil production process according to claim 1, characterized in that: The portion of the strip aluminum foil (22) located between the power distribution conveyor roller (2) and the water boiling tank (3) that is detached from the power distribution conveyor roller (2) and does not enter the high-purity water (5) for the hydration film is the inclined section (23) to be cooled, and the backward tilt angle β of the inclined section (23) to be cooled with respect to the horizontal plane is <90°.

8. The energy-saving system for the novel electrolytic foil production process according to claim 7, characterized in that: The water spray pipe (14) is located directly above the top of the inclined section (23) to be cooled.

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