WO2024119361A1 - Dispositif d'élimination d'huile de roulage de feuille et procédé d'élimination d'huile de roulage - Google Patents

Dispositif d'élimination d'huile de roulage de feuille et procédé d'élimination d'huile de roulage Download PDF

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Publication number
WO2024119361A1
WO2024119361A1 PCT/CN2022/136834 CN2022136834W WO2024119361A1 WO 2024119361 A1 WO2024119361 A1 WO 2024119361A1 CN 2022136834 W CN2022136834 W CN 2022136834W WO 2024119361 A1 WO2024119361 A1 WO 2024119361A1
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Prior art keywords
foil
rolling
extraction
extraction tank
extractant
Prior art date
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PCT/CN2022/136834
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English (en)
Chinese (zh)
Inventor
刘科
李正林
王成豪
宋启超
季玉琴
李学法
张国平
Original Assignee
江阴纳力新材料科技有限公司
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Application filed by 江阴纳力新材料科技有限公司 filed Critical 江阴纳力新材料科技有限公司
Priority to PCT/CN2022/136834 priority Critical patent/WO2024119361A1/fr
Publication of WO2024119361A1 publication Critical patent/WO2024119361A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/40—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling foils which present special problems, e.g. because of thinness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure

Definitions

  • the present application relates to the technical field of foil material preparation, and in particular to a foil material rolling degreasing device and a foil material rolling degreasing method.
  • the foil In the production process of traditional aluminum foil, there are multiple rolling and thinning steps, and rolling oil must be added during the rolling process.
  • the main functions of rolling oil are lubrication, cooling, washing and oxidation prevention.
  • the foil has the following problems: 1. Rolling oil remains on the surface of the produced foil, resulting in reduced surface polarity and uneven dyne value; 2.
  • Foil coating causes missing coating and poor peeling.
  • conductive materials such as active materials are mainly coated on battery foil through coating technology. The residual rolling oil on the surface will cause problems such as missing coating and weakened peeling force; 3.
  • the surface wetting tension of the foil is directly related to the amount of oil attached to the foil surface.
  • the surface tension of completely degreased aluminum foil is above 72 dynes, the surface tension of aluminum foil after rough rolling is about 31 dynes, and the surface tension of aluminum foil after fine rolling is about 32 dynes. If the oil is not thoroughly removed, the foil product will have defects such as oil stickiness, blistering, lines, and oil spots; the above problems seriously affect the subsequent coating and use of the foil.
  • a foil rolling degreasing device comprising:
  • a foil rolling mill used for rolling foil
  • An extraction tank in which an extractant is injected, a liquid sealing structure is provided at the opening of the extraction tank, and the extraction tank extracts and removes oil from the foil output by the foil rolling machine;
  • a dryer the dryer being used to dry the foil outputted from the extraction tank;
  • a foil conveyor is used to convey the foil from the foil rolling machine, the extraction tank to the dryer.
  • a plurality of overflow plates are disposed in the extraction tank, and the heights of the overflow plates are sequentially increased along the moving direction of the foil, and the plurality of overflow plates divide the extraction tank into a plurality of extraction chambers.
  • the extraction tank is provided with an extractant outlet on the foil input side of the extraction tank; and the extraction tank is provided with an extractant inlet on the foil output side of the extraction tank.
  • the extractant enters from the extractant inlet, flows through each of the extraction chambers in sequence, and is discharged from the extractant outlet.
  • At least one circulating cooler is disposed in the extraction tank.
  • each of the extraction chambers is provided with a circulating cooler, and the circulating cooler is used to adjust the temperature of the extractant in the extraction chamber.
  • the liquid sealing structure includes a sealing plate covering the opening of the extraction tank, the sealing plate being provided with at least one exhaust port, and the sealing plate being provided with a liquid storage tank and a sealing cap at each exhaust port, the liquid storage tank being arranged around the circumference of the exhaust port; the sealing cap is covered at the exhaust port, and the edge of the sealing cap is immersed below the liquid level of the liquid storage tank.
  • the extraction tank is externally connected to a positive pressure gas source
  • the positive pressure gas source is connected to the space above the liquid surface of the extraction tank
  • the positive pressure gas source is used to maintain the gas pressure in the extraction tank greater than the ambient gas pressure
  • the foil conveyor includes an unwinding mechanism, a rewinding mechanism, a tension mechanism, and a plurality of conveying rollers.
  • the unwinding mechanism is arranged at the input side of the foil rolling machine, and the winding mechanism is arranged at the output side of the dryer.
  • the tension mechanism comprises at least one tension roller, and the tension roller is used to provide tension to the foil.
  • the tension mechanism includes a first tension roller, a second tension roller and a third tension roller, the first tension roller is arranged between the unwinding mechanism and the foil roll, the second tension roller is arranged between the foil roll and the extraction tank, and the third tension roller is arranged between the extraction tank and the dryer.
  • each of the extraction chambers is independently provided with a liquid drain port, and the liquid drain port is provided at the bottom of each of the extraction tanks.
  • the dryer includes a shell, and a plurality of air nozzles are disposed in the shell.
  • the air nozzles are sequentially arranged along the moving direction of the foil, and the blowing direction of the air nozzles is toward the foil.
  • the present application provides a rolling degreasing method for foil, wherein the rolling degreasing method adopts the above-mentioned foil rolling degreasing device, and the rolling degreasing method comprises the following steps:
  • the foil After the foil is rolled, it is sequentially extracted with an extractant and dried to remove the rolling oil on the surface of the foil.
  • countercurrent contact extraction is used during the extraction process, and the movement direction of the foil is opposite to the flow direction of the extractant.
  • the extractant comprises dichloromethane.
  • the extractant is cooled during the extraction process.
  • an inert atmosphere is used during the extraction process.
  • the inert atmosphere has a pressure greater than the ambient gas pressure.
  • the gas of the inert atmosphere includes nitrogen.
  • the drying temperature is about 60-100°C, for example, 60°C, 65°C, 70°C, 75°C, 80°C, 85°C, 90°C, 95°C or 100°C.
  • the present application extracts and dries the rolled foil to achieve continuous and efficient removal of rolling oil on the foil surface.
  • the temperature of the foil increases after rolling, and the surface rolling oil is effectively removed during contact with the extractant.
  • the liquid seal structure is used to reduce the volatilization of the extractant and the generation of condensed water, thereby preventing condensed water from dripping onto the foil surface and affecting the surface performance of the foil.
  • the oil content can be reduced to below 0.1%.
  • FIG1 is a schematic diagram of the structure of a foil rolling oil removal device provided in some embodiments of the present application.
  • FIG. 2 is a diagram showing the internal structure of an extraction tank provided in one embodiment of the present application.
  • FIG3 is a cross-sectional view of a liquid sealing structure provided in one embodiment of the present application at an exhaust port.
  • 100-foil rolling machine 200-extraction tank; 201-overflow plate; 202-circulating cooler; 203-extraction agent inlet; 204-extraction agent outlet; 205-positive pressure air source; 300-dryer; 301-air nozzle; 400-liquid sealing structure; 401-exhaust port; 402-liquid storage tank; 403-sealing cap; 500-unwinding mechanism; 600-winding mechanism; 700-transmission roller; 800-tension mechanism; 801-first tension roller; 802-second tension roller; 803-third tension roller.
  • first and second are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as “first” and “second” may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality” is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
  • an embodiment of the present application provides a foil rolling oil removal device, as shown in FIG1 , comprising:
  • a foil rolling machine 100 used for rolling foil
  • An extraction tank 200 wherein an extractant is injected into the extraction tank 200, and a liquid sealing structure 400 is provided at the opening of the extraction tank 200, and the extraction tank 200 extracts and removes oil from the foil output by the foil rolling machine 100;
  • a dryer 300 the dryer 300 is used to dry the foil output from the extraction tank 200;
  • the foil conveyor is used to convey the foil from the foil rolling mill 100 and the extraction tank 200 to the dryer 300.
  • an extraction tank 200 and a dryer 300 are used to extract and dry the rolled foil, respectively.
  • the foil is immersed in an extractant to extract and remove the rolling oil on the surface.
  • the foil enters the dryer 300 to volatilize and remove the extractant remaining on the surface, thereby effectively ensuring the cleanliness of the foil surface and reducing the surface residual oil rate of the foil to below 0.1%, thereby achieving continuous and efficient removal of the rolling oil on the foil surface.
  • the foil rolling mill 100 includes a working roll, a support roll and a plurality of oil spray nozzles, the support roll is fixedly arranged, the working roll is movable, the thickness of the foil after rolling is controlled by the spacing between the support roll and the working roll, and the oil spray nozzle is used to spray rolling oil on the foil entering between the working roll and the support roll, and the foil sprayed with rolling oil enters the rolling area between the working roll and the support roll to roll the foil.
  • rolling oil is used to lubricate and cool the foil, and the thickness of the foil after rolling is about 13 to 15 ⁇ m, for example, it can be 13.0 ⁇ m, 13.2 ⁇ m, 13.4 ⁇ m, 13.6 ⁇ m, 13.8 ⁇ m, 14.0 ⁇ m, 14.2 ⁇ m, 14.4 ⁇ m, 14.6 ⁇ m, 14.8 ⁇ m or 15.0 ⁇ m.
  • a plurality of overflow plates 201 are provided in the extraction tank 200, and the height of the overflow plates 201 increases sequentially along the movement direction of the foil, and the plurality of overflow plates 201 separate the extraction tank 200 to form a plurality of extraction chambers.
  • a plurality of overflow plates 201 are provided in the extraction tank 200, and the overflow direction of the extractant is opposite to the movement direction of the foil by the different heights of the overflow plates 201, so as to realize multi-stage countercurrent extraction of the foil and improve the contact effect between the foil surface and the extractant.
  • the foil reciprocates in a serpentine manner in the extraction tank 200, thereby increasing the contact time between the foil and the extractant and effectively removing the rolling oil on the surface of the foil.
  • the extraction tank 200 is provided with an extractant outlet 204 on the foil input side of the extraction tank 200; the extraction tank 200 is provided with an extractant inlet 203 on the foil output side of the extraction tank 200, and the extractant enters from the extractant inlet 203, flows through each of the extraction chambers in sequence, and is discharged from the extractant outlet 204.
  • the extractant is added through the extractant inlet 203 to maintain the extractant concentration in each extraction chamber, and provide overflow flow power.
  • the rolling oil floats on the surface of the extractant liquid surface, so that the liquid layer containing the rolling oil on the surface can be discharged by overflow, effectively ensuring the extraction effect of the extraction tank 200.
  • a concentration detector (not shown) may be further provided in the extraction tank 200 to detect the concentration of rolling oil or the concentration of extractant in the extraction tank 200, thereby regulating the liquid inlet speed of the extractant according to the concentration detection in the extraction tank 200, thereby ensuring the stability of the extractant concentration in the extraction tank 200 in real time.
  • the mixture of rolling oil and extractant discharged from the extractant outlet 204 is connected to a separation device (not shown).
  • the separation device can be a fractionator, which separates the rolling oil and the extractant by distillation to achieve recycling of the rolling oil and the extractant.
  • At least one circulating cooler 202 is provided in the extraction tank 200.
  • each of the extraction chambers is provided with a circulating cooler 202, and the circulating cooler 202 is used to adjust the temperature of the extractant in the extraction chamber.
  • the circulating cooler 202 includes a circulating pipeline connected to the extraction chamber in a circulation manner, and the circulation management is provided with a circulating pump and a cooler.
  • the cooler can be a heat pipe heat exchanger.
  • the circulating pump drives the extractant in the extraction chamber to circulate, realize the internal circulation flow of the extractant, and ensure the uniformity of the extractant in the extraction chamber.
  • the extractant contacts the cooler during the circulation process to cool down, reduce the temperature of the extractant, and then reduce the evaporation of the extractant and the evaporation of water vapor, and reduce the condensation of water vapor.
  • the liquid sealing structure 400 includes a sealing plate covering the opening of the extraction tank 200. As shown in FIG3 , the sealing plate is provided with at least one exhaust port 401. The sealing plate is provided with a liquid storage tank 402 and a sealing cap 403 at each exhaust port 401. The liquid storage tank 402 is arranged around the exhaust port 401. The sealing cap 403 covers the exhaust port 401, and the edge of the sealing cap 403 is immersed below the liquid level of the liquid storage tank 402.
  • the sealing cap 403 is fixed on the sealing plate or the wall of the liquid storage tank 402 by means of a bracket. After the sealing cap 403 is extended into the liquid storage tank 402, a U-shaped groove structure is formed. After liquid is added into the liquid storage tank 402, a liquid sealing layer is formed to achieve a sealing effect, that is, the sealing is isolated and sealed by the liquid sealing layer and the side wall of the sealing cap 403.
  • the extraction tank 200 is externally connected to a positive pressure gas source 205, and the positive pressure gas source 205 is connected to the space above the liquid surface of the extraction tank 200, and the positive pressure gas source 205 is used to maintain the gas pressure in the extraction tank 200 greater than the ambient gas pressure.
  • the positive pressure gas source 205 can be a nitrogen gas source.
  • the foil conveyor includes an unwinding mechanism 500 , a rewinding mechanism 600 , a tension mechanism 800 , and a plurality of conveying rollers 700 .
  • the unwinding mechanism 500 is arranged at the input side of the foil rolling mill 100, and the winding mechanism 600 is arranged at the output side of the dryer 300.
  • the unwinding mechanism 500 includes an unwinding roller and an unwinding drive motor, the unwinding drive motor is used to drive the unwinding roller to rotate, so as to output the foil material wound on the unwinding roller, and the unwinding roller can adopt an air expansion shaft, for example, the unwinding speed is about 10-150m/min;
  • the winding mechanism 600 includes a winding roller and a winding drive motor, and the winding drive motor is used to drive the winding roller to rotate, so as to wind the foil material on the winding roller for collection.
  • the tension mechanism 800 includes at least one tension roller, and the tension roller is used to provide foil tension.
  • the tension mechanism 800 includes a first tension roller 801, a second tension roller 802 and a third tension roller 803, wherein the first tension roller 801 is disposed between the unwinding mechanism 500 and the foil rolling device 100, the second tension roller 802 is disposed between the foil rolling device 100 and the extraction tank 200, and the third tension roller 803 is disposed between the extraction tank 200 and the dryer 300.
  • three tension rollers are provided to form four tension control sections, so that precise control can be achieved during foil transmission.
  • the foil rolling and oil removal device also includes a tension detector (not shown) and a tension regulator (not shown).
  • the tension detector detects the tension of each tension roller respectively, so that the position of the tension roller is adjusted by the tension regulator to increase the tension of the foil and avoid the problem of wrinkling of the foil.
  • the tension detection of the tension roller can be achieved by detecting the surface pressure of the tension roller.
  • the tension regulator can be composed of a PLC controller and a driver, that is, the driver is connected to the tension roller for moving the position of the tension roller.
  • the PLC controller is electrically connected to the driver and the tension detector independently, so as to adjust the foil tension in real time through automatic control.
  • each extraction chamber is independently provided with a drain port, and the drain port is provided at the bottom of each extraction tank 200.
  • each drain port is connected to a drain pipe. The present application provides a drain port in each extraction chamber, so that rapid drainage can be achieved during the cleaning process.
  • the dryer 300 includes a shell, and a plurality of air nozzles 301 are disposed in the shell.
  • the air nozzles 301 are sequentially arranged along the moving direction of the foil, and the blowing direction of the air nozzles 301 is toward the foil.
  • an embodiment of the present application provides a rolling degreasing method for foil, wherein the rolling degreasing method adopts the foil rolling degreasing device as described in the first aspect, and the rolling degreasing method comprises the following steps:
  • the foil After the foil is rolled, it is sequentially extracted with an extractant and dried to remove the rolling oil on the surface of the foil.
  • countercurrent contact extraction is used during the extraction process, and the movement direction of the foil is opposite to the flow direction of the extractant.
  • the present application improves the contact effect between the foil and the extractant and improves the rolling oil removal effect by countercurrent contact between the foil and the extractant.
  • the extractant includes dichloromethane.
  • dichloromethane used as the extractant, which has high solubility in rolling oil and can remove rolling oil on the surface and in the gaps of the foil.
  • dichloromethane has a low boiling point and is easy to be dried and removed, thereby not affecting the surface properties of the foil.
  • dichloromethane and rolling oil can be separated by fractionation to achieve recycling of rolling oil and dichloromethane.
  • the extractant is cooled during the extraction process.
  • an inert atmosphere is used during the extraction process.
  • the inert atmosphere has a pressure greater than the ambient gas pressure.
  • the inert atmosphere gas includes nitrogen.
  • the drying process is performed at a temperature of about 60-100°C.
  • the present application provides a rolling degreasing method for the above-mentioned foil, comprising the following steps:
  • the foil After the foil is rolled, it enters the extraction tank 200 and passes through multiple extraction chambers in sequence for multi-stage extraction.
  • the flow direction of the extractant is opposite to the movement direction of the foil.
  • the extractant adopts overflow flow.
  • the foil After extraction, the foil enters the dryer 300 to dry and remove the extractant remaining on the surface of the foil.
  • the mixed liquid flowing out of the extraction tank 200 is recovered and processed.
  • the thickness of the foil after rolling is 13 ⁇ m
  • the rolling oil is CL-1# aluminum foil rolling oil
  • the length of the foil immersed in the extractant is 20 m
  • the type of the foil is aluminum foil
  • the unwinding speed is 50 m/min.
  • the present embodiment provides a foil rolling and oil removal device, comprising a foil rolling machine 100, an extraction tank 200 and a dryer 300 arranged in sequence along the moving direction of the foil, a liquid sealing structure 400 is arranged at the opening of the extraction tank 200, the extraction agent of the extraction tank 200 is dichloromethane, and the drying temperature of the dryer 300 is 80°C.
  • the liquid sealing structure 400 includes a sealing plate covering the opening of the extraction tank 200, wherein the sealing plate is provided with two exhaust ports 401, and each of the exhaust ports 401 is provided with a liquid storage tank 402 surrounding the exhaust ports 401 and a sealing cap 403, and the edge of the sealing cap 403 is immersed below the liquid level of the liquid storage tank 402.
  • the foil rolling and oil removal device further comprises a foil conveyor, which is used to convey the foil, and the foil reciprocates in a serpentine shape in the extraction tank 200 .
  • the foil material conveyor includes an unwinding mechanism 500, a rewinding mechanism 600, a tension mechanism 800 and a plurality of conveying rollers 700; the unwinding mechanism 500 is arranged at the feeding side of the foil rolling device 100, and the rewinding mechanism 600 is arranged at the discharging side of the dryer 300.
  • the tension rollers include a first tension roller 801, a second tension roller 802 and a third tension roller 803, wherein the first tension roller 801 is arranged between the unwinding mechanism 500 and the foil rolling device 100, the second tension roller 802 is arranged between the foil rolling device 100 and the extraction tank 200, and the third tension roller 803 is arranged between the extraction tank 200 and the dryer 300.
  • This embodiment provides a foil rolling oil removal device. Compared with Embodiment 1, the difference lies in that three overflow plates 201 are arranged in the extraction tank 200. The height of the overflow plates 201 increases successively along the movement direction of the foil. The overflow plates 201 divide the extraction tank 200 into four extraction chambers.
  • the extraction tank 200 is provided with an extractant outlet 204 on the foil input side of the extraction tank 200, and is provided with an extractant inlet 203 on the foil output side of the extraction tank 200.
  • the extractant enters from the extractant inlet 203, flows through each extraction chamber in sequence, and is discharged from the extractant outlet 204.
  • This embodiment provides a foil rolling oil removal device. Compared with Example 2, the difference is that the extraction chamber is provided with a circulating cooler 202, and the circulating cooler 202 includes a circulating pipeline circulatedly connected to the extraction chamber.
  • the circulation management is provided with a circulating pump and a cooler, and the temperature of the cooler is 25°C.
  • This embodiment provides a foil rolling oil removal device. Compared with Embodiment 1, the difference lies in that a positive pressure gas source 205 is connected above the liquid surface in the extraction tank 200, the positive pressure gas source 205 is nitrogen, and the gas pressure in the extraction tank 200 is greater than the ambient gas pressure of 200Pa.
  • the present embodiment provides a foil rolling and oil removal device, comprising a foil rolling device 100, an extraction tank 200 and a dryer 300 which are sequentially arranged along the moving direction of the foil, wherein the extraction tank 200 is injected with dichloromethane.
  • a liquid sealing structure 400 is provided at the opening of the extraction tank 200, and the liquid sealing structure 400 includes a sealing plate covering the opening of the extraction tank 200, and the sealing plate is provided with two exhaust ports 401, and the exhaust ports 401 are each provided with a liquid storage tank 402 surrounding the exhaust ports 401 and a sealing cap 403, and the edge of the sealing cap 403 is immersed below the liquid level of the liquid storage tank 402.
  • the overflow plates 201 divide the extraction tank 200 into four extraction chambers, which are located on the foil input side of the extraction tank 200.
  • the extraction tank 200 is provided with an extractant outlet 204, which is located on the foil output side of the extraction tank 200.
  • the extraction tank 200 is provided with an extractant inlet 203.
  • the extractant enters from the extractant inlet 203 and flows through each extraction chamber in sequence, and is discharged from the extractant outlet 204.
  • the extraction chambers are all provided with circulating coolers 202, and the temperature of the circulating coolers 202 is 25°C.
  • the extraction chambers are all independently provided with drain ports, and the drain ports are all arranged at the bottom of the extraction tank 200.
  • a positive pressure gas source 205 is connected above the liquid level in the extraction tank 200, and the positive pressure gas source 205 is used to maintain the gas pressure in the extraction tank 200 greater than the ambient gas pressure of 200 Pa.
  • the dryer 300 includes a shell and 20 air nozzles 301 arranged in the shell, and the air nozzles 301 are arranged in sequence along the moving direction of the foil. The temperature of the dryer 300 is 80°C.
  • the foil rolling and oil removal device further includes a foil conveyor, which includes an unwinding mechanism 500, a rewinding mechanism 600, a tension mechanism 800 and a plurality of conveying rollers 700; the unwinding mechanism 500 is arranged at the feeding side of the foil rolling machine 100, and the rewinding mechanism 600 is arranged at the discharging side of the dryer 300.
  • the tension rollers include a first tension roller 801, a second tension roller 802 and a third tension roller 803, wherein the first tension roller 801 is arranged between the unwinding mechanism 500 and the foil rolling machine 100, the second tension roller 802 is arranged between the foil rolling machine 100 and the extraction tank 200, and the third tension roller 803 is arranged between the extraction tank 200 and the dryer 300.
  • This comparative example provides a foil rolling oil removal device, which is different from Example 1 in that the extraction tank 200 and the dryer 300 are replaced by a high-temperature steam purging device, the purging foil length is 1 m, and the temperature of the high-temperature steam is 110°C.
  • the surface residual oil rate of the foil after degreasing in the above embodiment and comparative example was tested, and the test results are shown in Table 1.
  • the detection method includes:
  • Example 1 The Surface residual oil rate Example 1 0.10% Example 2 0.07% Example 3 0.06% Example 4 0.08% Example 5 0.05% Comparative Example 1 4.00%
  • Example 2 It can be seen from Example 2 that in the present application, a plurality of overflow plates 201 are arranged in the extraction tank 200, and by means of the different heights of the overflow plates 201, the overflow direction of the extractant is opposite to the movement direction of the foil, thereby realizing multi-stage countercurrent extraction of the foil, improving the contact effect between the foil surface and the extractant, and after extraction, the rolling oil floats on the surface of the extractant liquid, so that the liquid layer containing the rolling oil on the surface can be discharged by overflow, thereby effectively ensuring the extraction effect of the extraction tank 200.
  • Example 3 It can be seen from Example 3 that the present application realizes internal circulation flow of the extractant by circulating and cooling the extractant, thereby ensuring the uniformity of the extractant in the extraction chamber, improving the turbulent flow of the extractant, and ensuring the contact disturbance between the extractant and the foil, thereby improving the extraction effect. Furthermore, the extractant is cooled by contact with the cooler during the circulation process, thereby lowering the temperature of the extractant, reducing the evaporation of the extractant and the evaporation of water vapor, and thus reducing the condensation of water vapor.
  • Example 4 it can be seen from Example 4 that in the present application, by introducing gas into the extraction tank 200, a slightly positive pressure state is formed in the extraction tank 200, which effectively prevents water vapor in the ambient gas from entering the extraction tank 200, reduces water vapor condensation, and reduces the volatilization of the extractant by means of slightly positive pressure.
  • the present application extracts and dries the rolled foil to achieve continuous and efficient removal of rolling oil on the foil surface.
  • the temperature of the foil increases after rolling, and after entering the extraction tank 200, it comes into contact with the extractant to effectively remove the surface rolling oil.
  • the liquid seal structure 400 is used to reduce the volatilization of the extractant and the generation of condensed water, thereby preventing condensed water from dripping onto the foil surface and affecting the surface performance of the foil.
  • the oil content can be reduced to below 0.1%.

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Abstract

L'invention concerne un dispositif d'élimination d'huile de roulage de feuille, comprenant un rouleau de feuille (100), un réservoir d'extraction (200) et un séchoir (300), qui sont agencés séquentiellement dans une direction de mouvement de feuille, le réservoir d'extraction étant conçu pour contenir un agent d'extraction ; une structure d'étanchéité aux liquides étant disposée au niveau d'une ouverture du réservoir d'extraction ; le rouleau de feuille étant conçu pour rouler une feuille ; et le séchoir étant conçu pour sécher la feuille. Le dispositif d'élimination d'huile de roulage de feuille comprend en outre un transporteur de feuille conçu pour transporter la feuille à partir du rouleau de feuille, à travers le réservoir d'extraction vers le séchoir. L'invention concerne également un procédé d'élimination d'huile de roulage utilisant le dispositif d'élimination d'huile de roulage de feuille. Le dispositif élimine l'huile de la feuille au moyen d'une extraction et le réservoir d'extraction est scellé au moyen de la structure d'étanchéité aux liquides, ce qui permet de réduire la volatilisation de l'agent d'extraction et de réduire l'impact de l'eau condensée sur les performances de surface de la feuille.
PCT/CN2022/136834 2022-12-06 2022-12-06 Dispositif d'élimination d'huile de roulage de feuille et procédé d'élimination d'huile de roulage WO2024119361A1 (fr)

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PCT/CN2022/136834 WO2024119361A1 (fr) 2022-12-06 2022-12-06 Dispositif d'élimination d'huile de roulage de feuille et procédé d'élimination d'huile de roulage

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PCT/CN2022/136834 WO2024119361A1 (fr) 2022-12-06 2022-12-06 Dispositif d'élimination d'huile de roulage de feuille et procédé d'élimination d'huile de roulage

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Citations (10)

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