A non-contact thin-film liquid removal system

Abstract

This invention discloses a non-contact thin-film liquid removal system. A suction nozzle cooperates with a traction roller for pulling the film to form a through-mold channel for the film to pass through. The suction nozzle has an air intake channel and an air exhaust channel. The air intake direction of the air intake channel points along the direction from the traction roller to the suction nozzle, and the air exhaust direction of the air exhaust channel points along the direction from the suction nozzle to the traction roller. A cyclone separator has a gas-liquid inlet, a gas outlet, and a liquid outlet. The gas-liquid inlet is connected to the air intake channel pipe, and the gas outlet is connected to the air exhaust channel pipe. A vacuum pump is installed on the pipe between the gas outlet and the air exhaust channel. The suction nozzle can remove liquid from the film surface, achieving the purpose of liquid removal. This invention uses a non-contact method to remove residual liquid from the film surface, resulting in excellent liquid removal efficiency. It also prevents the film from being scratched, maintains the integrity of the film surface, and stabilizes the appearance quality of the film.

Description

Technical Field

[0001] This invention relates to the field of thin film manufacturing, and more particularly to a non-contact thin film liquid removal system. Background Technology

[0002] In the preparation of thin film materials, they often need to be immersed in various baths for surface treatment or washing processes, followed by drying before being wound up. However, before drying the thin film material, the liquid remaining on the surface often cannot be effectively removed. If the film is dried directly without liquid removal treatment, the drying effect will be poor.

[0003] In related technologies, doctor rollers or doctor blades are often used to remove liquid from the film. However, regardless of whether a doctor roller or doctor blade is used, it comes into contact with the film surface, which can easily scratch the film surface during relative movement, affecting the film's appearance quality. Furthermore, the liquid removal effect of these methods is not ideal, and a significant amount of liquid residue may still remain on the film surface after removal. Summary of the Invention

[0004] To address the aforementioned technical problems, the present invention aims to provide a non-contact thin-film liquid removal system that removes residual liquid from the thin-film surface in a non-contact manner, achieving excellent liquid removal efficiency and preventing scratches on the thin-film surface during the liquid removal process, thus helping to maintain the integrity of the thin-film surface and stabilize the appearance quality of the thin film.

[0005] To achieve the above objectives, the present invention provides a non-contact thin-film liquid removal system, comprising:

[0006] A suction nozzle, which cooperates with a traction roller for pulling the film to form a die-through channel for the film to pass through. The suction nozzle has an air suction channel and an air exhaust channel. The air suction direction of the air suction channel is along the direction from the traction roller to the suction nozzle, and the air exhaust direction of the air exhaust channel is along the direction from the suction nozzle to the traction roller.

[0007] A cyclone separator has a gas-liquid inlet, a gas outlet, and a liquid outlet. The gas-liquid inlet is connected to the suction channel pipe, and the gas outlet is connected to the exhaust channel pipe. A vacuum pump is installed on the pipe between the gas outlet and the exhaust channel.

[0008] In some embodiments, the suction nozzle includes a suction nozzle body, the inner cavity of which forms the non-communicating suction channel and exhaust channel, and one end of the suction nozzle body has an arc surface that matches the shape of the traction roller, the arc surface cooperating with the outer peripheral surface of the traction roller to form the die-cutting channel.

[0009] In some embodiments, an air intake port and two exhaust ports are provided through the arc surface, extending along its length. The air intake port is located at the middle of one end of the liquid suction nozzle body and is connected to the air intake channel. The two exhaust ports are respectively located on both sides of the width direction of the air intake port and are connected to the exhaust channel.

[0010] In some embodiments, the suction nozzle body is cylindrical.

[0011] In some embodiments, the main body of the suction nozzle has a cone-shaped structure, the exhaust port has a narrow slit-shaped structure, the suction channel has a cone-shaped structure and penetrates the arc surface of the main body of the suction nozzle, and the cross-sectional area of ​​the suction channel in the vertical direction gradually decreases in the direction gradually away from the traction roller.

[0012] In some embodiments, the air intake channel is connected to the gas-liquid inlet of the cyclone separator via an air intake hose, and the exhaust channel is connected to an exhaust hose. The exhaust hose is fitted onto the outside of the air intake hose, and the end of the exhaust hose facing away from the main body of the suction nozzle is installed on a manifold connector. One end of the air intake hose passes through the manifold connector and is connected to the gas-liquid inlet of the cyclone separator. An exhaust extension pipe is also installed on the manifold connector. One end of the exhaust extension pipe is connected to a fitting on the cyclone separator and is connected to the exhaust hose via the manifold connector.

[0013] In some embodiments, the exhaust direction of the exhaust port is perpendicular to the exhaust direction of the intake channel.

[0014] In some embodiments, the inner surface of the cyclone separator housing is coated with a hydrophobic coating or material.

[0015] In some embodiments, the suction nozzle is connected to a drive mechanism and is driven by the drive mechanism to perform linear motion or oscillation, so as to bring the suction nozzle closer to or away from the traction roller.

[0016] In some embodiments, the number of suction nozzles is at least two, and they are respectively arranged on both sides of the membrane surface; the liquid outlet of the cyclone separator is connected to the washing tank pipe, and a filter is provided on the pipe between the cyclone separator and the washing tank.

[0017] Compared with the prior art, the non-contact thin-film liquid removal system provided by the present invention has the following advantages:

[0018] In this invention, after the vacuum pump is started, it can generate negative pressure in the cyclone separator. Under the influence of atmospheric pressure, the suction nozzle set close to the membrane surface generates suction on the membrane surface. Air and residual liquid on the membrane surface are forced to be transported to the gas-liquid inlet of the cyclone separator through the suction channel in the suction nozzle, thereby achieving the purpose of membrane liquid removal.

[0019] The suction nozzle is located on the outer side of the film surface and is positioned opposite to the traction roller, forming a through-drilling channel for the film to pass through. The depth of the through-drilling channel is greater than the thickness of the film, so that the film does not come into contact with the suction nozzle when passing through the through-drilling channel. This prevents the film surface from being scratched due to the relative movement between the film and the suction nozzle, helps to maintain the integrity of the film surface, and stabilizes the appearance quality of the film.

[0020] The cyclone separator separates tangentially entering liquid and air. The denser liquid exits from the liquid outlet at the bottom of the cyclone separator, while the less dense air exits from the top. The separated air flows back through a pipe to the exhaust channel of the suction nozzle, and the exhaust port sprays air onto the membrane surface. Because the exhaust air has a high exhaust pressure, it keeps the membrane in contact with the traction roller, preventing the membrane from being lifted by pressure. This helps stabilize the smoothness of the membrane movement and the effectiveness of the liquid removal process.

[0021] The membrane liquid removal system proposed in this invention can achieve non-contact liquid removal from the membrane, and there are no environmental problems caused by the emission of liquid-containing gas during the process. It will not affect the ambient air pressure at the site, making it an ideal membrane liquid removal device. Attached Figure Description

[0022] The preferred embodiments will now be described in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of the present invention.

[0023] Figure 1 This is a schematic diagram of the overall structure of a non-contact thin-film liquid removal system according to one embodiment of the present invention.

[0024] Figure 2 This is a schematic diagram of the cyclone separator in this invention.

[0025] Figure 3 This is a schematic diagram of the structure of the part containing the traction roller and the suction nozzle in this invention.

[0026] Figure 4 This is a schematic diagram of the structure of the part where the traction roller and the suction nozzle are located during the mold-making process in this invention.

[0027] Figures 5 to 7 This is a schematic diagram of the different liquid suction nozzles in this invention.

[0028] Figure 8 This is a schematic diagram of the pipe connection between the suction nozzle and the cyclone separator in one embodiment of the present invention.

[0029] Explanation of icon numbers:

[0030] 1. Washing tank; 2. Traction roller; 3. Suction nozzle; 3. Suction nozzle body; 31. Suction channel; 311. Suction port; 32. Exhaust channel; 321. Arc surface; 33. Suction hose; 34. Exhaust hose; 35. Pipe connector; 36. Exhaust extension pipe; 37. Cyclone separator; 4. Gas-liquid inlet; 41. Gas outlet; 42. Liquid outlet; 43. Vacuum pump; 5. Implementation

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0032] One embodiment of the present invention is a non-contact thin-film liquid removal system that uses negative pressure suction to remove residual liquid on the surface of a thin film, which is a continuous roll material.

[0033] Please refer to Figure 1 The non-contact liquid removal system proposed in this invention is used in conjunction with the traction roller 2 for pulling the film. The liquid removal system includes a cyclone separator 4 and a liquid suction device, wherein the liquid suction device is used to suck up the liquid on both sides of the film and send it into the cyclone separator 4, and the cyclone separator 4 is used to perform gas-liquid separation and realize the recovery of liquid.

[0034] The main features of a cyclone separator are its simple structure, high operational flexibility, and high efficiency. It is a novel, efficient, energy-saving, and economical separation device suitable for long-term operation. The working principle is based on the rotational motion caused by the tangential introduction of airflow and the density difference between the gas and liquid phases. By utilizing the centrifugal force generated by the high-speed rotation of the fluid in the cyclone separator, the liquid droplets are separated from the gas, thus achieving the purpose of gas-liquid separation.

[0035] Please refer to Figure 2 The cyclone separator 4 includes an upper separator section and a lower separator section. The upper separator section is generally cylindrical and has a gas-liquid inlet 41, a gas outlet 42, and a liquid outlet 43. The gas-liquid inlet 41 adopts a tangential air intake method and is positioned adjacent to the upper separator section. A pipe is provided on the upper separator section, extending into the upper part of the cyclone separator 4 and fluidly connected to the gas outlet 42 of the cyclone separator 4. The lower separator section is located below the upper separator section and is generally shaped as a truncated cone that narrows downwards. The truncated cone extends symmetrically around a longitudinal axis located at its center. The liquid outlet 43 is located at the bottom of the lower separator section.

[0036] After the liquid suction device draws in the liquid from the membrane surface, the mixture of liquid and air is introduced into the interior of the upper separation section in a tangential manner through the gas-liquid inlet 41 of the cyclone separator 4 in the form of a mist. After entering the cyclone separator 4, it flows downward through the conical lower separation section in a spiral path.

[0037] In this embodiment, the gas-liquid inlet 41 adopts a tangential air intake method, and the lower separator is configured in the shape of a truncated cone, which forces the liquid flow to rotate and form a spiral path. Due to the high centrifugal force generated in the spiral flow, the denser liquid will move to the outermost periphery of the cross-sectional area of ​​the lower separator shell and gradually move downward, eventually being discharged through the liquid outlet 43. The core of the lower separator retains air with a lower density. Since the vertical cross-sectional area of ​​the lower separator gradually decreases downward, the excess air in the lower separator is forced to move upward and exit the cyclone separator 4 after passing through the gas outlet 42.

[0038] Thus, the cyclone separator 4 performs gas-liquid separation on the tangentially entering liquid and air, causing the relatively denser liquid to be discharged from the liquid outlet 43 at the bottom of the cyclone separator 4, and the less dense air to be discharged from the top of the cyclone separator 4. Although Figure 1 and Figure 2 A vertically oriented cyclone separator 4 is shown, but those skilled in the art will understand that the cyclone separator 4 may be non-vertically oriented when space requirements do not permit vertical orientation.

[0039] It is understood that the diameters of the liquid outlet 43 and the gas outlet 42 are set such that the cyclone separator 4 has the expected liquid discharge rate and gas discharge rate. The diameter of the gas outlet 42 can be greater than, less than or equal to the diameter of the liquid outlet 43, and can be adaptively adjusted according to the site environment and usage requirements. This embodiment of the invention does not impose specific limitations.

[0040] In some embodiments, the inner surface of the cyclone separator 4 housing may also be coated with a hydrophobic coating or material, which can prevent or reduce liquid from sticking to the inner surface of the cyclone separator housing, allowing the liquid to move more smoothly toward the liquid outlet 43.

[0041] Please refer to it again. Figure 1 The liquid suction device includes a suction nozzle 3 and a vacuum pump 5. Figure 1 The liquid suction device shown includes two suction nozzles. It can be understood that during actual liquid removal, multiple staggered suction nozzles 3 can be arranged at intervals along the direction of film movement. The embodiments of the present invention do not impose a specific limitation on the number of suction nozzles 3.

[0042] Multiple suction nozzles 3 of the suction device are respectively disposed on the outer sides of two film surfaces, and the suction nozzles 3 are arranged opposite to the traction rollers 2 used to pull the film, forming a through-dip channel for the film to pass through. The through-dip channel allows the film to pass through, and its depth is greater than the thickness of the film, so that the film can pass through the through-dip channel without contacting the suction nozzles 3. This avoids the suction nozzles 3 scratching the film due to the relative movement between the film and the suction nozzles 3, thereby maintaining the integrity of the film surface.

[0043] Please combine Figure 1 , Figure 2 , Figures 5 to 7 In this invention, the suction nozzle 3 has a through-type suction channel 31 and exhaust channel 32, which are not interconnected. The suction channel 31 is connected to the gas-liquid inlet 41 of the cyclone separator 4 via a pipe, and the exhaust channel 32 is connected to the gas outlet 42 of the cyclone separator 4 via a pipe. The vacuum pump 5 is installed on the pipe between the exhaust channel 32 and the gas outlet 42. When the non-contact membrane liquid removal system is applied to membrane liquid removal, the liquid outlet 43 of the cyclone separator 4 is connected to the washing tank 1 via a pipe. The washing tank 1 contains liquid, and the aforementioned traction roller 2 and suction nozzle 3 are both located in the washing tank 1 and above the liquid level.

[0044] According to the non-contact thin-film liquid removal system proposed in this invention, after the vacuum pump 5 is started, the vacuum pump 5 draws air from the cyclone separator 4, generating negative pressure within the cyclone separator 4. Under the influence of atmospheric pressure, the suction nozzle 3, positioned close to the membrane surface, generates suction on the membrane surface. Air and residual liquid on the membrane surface enter the suction channel 31 within the suction nozzle 3 and are forcibly transported to the gas-liquid inlet 41 of the cyclone separator 4. The flow in the gas-liquid inlet 41 is perpendicular to the central axis of its conical shell and proceeds along a spiral path. Under the influence of centrifugal force, the denser liquid moves to the outer periphery of the lower separation section's conical shell and adheres to the inner surface of the conical shell. The less dense air flows to the central region of the conical shell, passes through the gas outlet 42, and flows towards the exhaust channel 32 of the suction nozzle 3, ultimately being sprayed onto the membrane surface through the exhaust channel 32. The suction nozzle 3 in this invention is constructed to not only draw in air but also expel air, thereby achieving a suction and exhaust cycle.

[0045] The liquid outlet 43 of the cyclone separator 4 is used to discharge liquid. After leaving the cyclone separator 4, the liquid flows back to the washing tank 1 through a pipeline to achieve liquid recycling. During the extraction process, particulate matter, such as incompletely melted polymer particles adhering to the membrane surface, may be introduced into the washing tank 1. After the membrane moves out of the liquid surface, these particles may still adhere to the membrane surface. When the suction nozzle draws air, these particles are introduced into the cyclone separator 4 and discharged from the liquid outlet 43 at the bottom of the cyclone separator 4. To prevent particulate matter from recirculating around the washing tank 1, a filter is installed downstream of the liquid outlet 43 of the cyclone separator 4. The filter separates the particulate matter. To ensure filtration performance, the filter can be cleaned or replaced periodically.

[0046] Figure 5 The image shows a first-shaped suction nozzle 3 in an embodiment of the present invention. The suction nozzle 3 includes a suction nozzle body 30, which is generally cylindrical. Its inner cavity is divided by a partition into a non-communicating suction channel 31 and an exhaust channel 32. One end of the suction nozzle body 30 has an arc surface 33 that matches the shape of the traction roller 2. This arc surface 33 cooperates with the outer peripheral surface of the traction roller 2 to form the mold-through channel. A suction port 311 and two exhaust ports 321 are provided through the arc surface 33 of the suction nozzle body 30. The suction port 311 is located in the middle of one end of the suction nozzle body 30 and communicates with the suction channel 31. The two exhaust ports 321 are respectively located on both sides of the suction port 311 and communicate with the exhaust channel 32.

[0047] Both the suction port 311 and the exhaust port 321 are narrow slits extending axially along the traction roller 2 used for pulling the film, that is, extending along the length direction of the suction nozzle body 30. The lengths of the suction port 311 and the exhaust port 321 are approximately equal to the width of the film. It can be understood that the slit shape described in this embodiment of the invention refers to an elongated hole with a relatively narrow width and a long shape. The other end of the suction nozzle body 30 is provided with a suction connector and an exhaust connector. The suction connector connects the suction channel 31 to the gas-liquid inlet 41 of the cyclone separator 4 through a pipe, and the exhaust connector connects the exhaust channel 32 to the gas outlet 42 on the cyclone separator 4 through a pipe.

[0048] In the use of the first-shaped suction nozzle 3, the vacuum pump 5 draws negative pressure on the cyclone separator 4. Under the action of the air pressure difference, the liquid and air on the film surface in the mold channel move toward the suction port 311. After passing through the suction channel 31, they enter the cyclone separator 4 through the pipe. After the gas-liquid separation is completed in the cyclone separator 4, the air is released from the top of the cyclone separator 4 and moves toward the exhaust channel 32 of the suction nozzle 3 through the pipe. After the air enters the exhaust channel 32, it is sprayed out from the exhaust port 321 of the exhaust channel 32 toward the film surface.

[0049] In this embodiment of the invention, the exhaust port 321 is slit-shaped, and the air ejected through the exhaust port 321 has a high exhaust pressure, which can keep the film in contact with the traction roller 2, prevent the film from being lifted due to pressure, help stabilize the film movement, and ensure the effectiveness of the liquid removal process.

[0050] Figure 6 The image shows a second-shaped suction nozzle 3 in an embodiment of the present invention. The difference between the suction nozzle 3 and the first-shaped suction nozzle 3 is that the exhaust port 321 has a narrower slit-like structure, the suction channel 31 has a cone-like structure, and it penetrates the arc surface 33 of the suction nozzle body 30. In the direction that gradually moves away from the traction roller 2, the cross-sectional area of ​​the vertical direction of the suction channel 31 gradually decreases.

[0051] See Figure 6 and Figure 8 The suction channel 31 is connected to the gas-liquid inlet 41 of the cyclone separator 4 via the suction hose 34. The exhaust channel 32 is connected to the exhaust hose 35, which is fitted onto the outside of the suction hose 34. The end of the exhaust hose 35 away from the main body 30 of the suction nozzle is installed on the pipe connector 36. One end of the suction hose 34 passes through the pipe connector 36 and is connected to the gas-liquid inlet 41 of the cyclone separator 4. An exhaust extension pipe 37 is also installed on the pipe connector 36. One end of the exhaust extension pipe 37 is connected to the fittings on the cyclone separator 4 and is connected to the exhaust hose 35 via the pipe connector 36.

[0052] In the use of the second-shaped suction nozzle 3, the suction channel 31 has a conical structure and penetrates the arc surface 33 of the suction nozzle body 30. The vertical cross-sectional area of ​​the suction channel 31 gradually decreases in the direction gradually moving away from the traction roller 2. This allows the suction nozzle 3 to have a larger suction range, effectively removing residual liquid from the film surface and ensuring thorough liquid removal. Furthermore, the conical design of the suction nozzle 3 provides a neat structural appearance while allowing the suction hose 34 to be housed within the exhaust hose 35, facilitating pipeline layout.

[0053] Figure 7 The illustration shows a third-shaped suction nozzle 3 in this embodiment of the invention. The difference between this third-shaped nozzle and the second-shaped suction nozzle 3 lies in the exhaust direction of the exhaust channel 32. In the second-shaped nozzle, the exhaust direction is parallel to the exhaust direction of the suction channel 31, while in the third-shaped nozzle, the exhaust direction is perpendicular to the exhaust direction of the exhaust channel 32. This ensures, on the one hand, that the air ejected through the exhaust port 321 has a high exhaust pressure, maintaining contact between the film and the traction roller 2 and preventing the film from being lifted due to pressure. On the other hand, it also allows the outwardly ejected gas to diffuse promptly towards the suction channel 31, facilitating exhaust circulation.

[0054] In this invention, a die-through channel is formed between the traction roller 2 and the suction nozzle 3, allowing the film to pass through. To ensure the suction effect of the suction nozzle 3, it needs to be sufficiently close to the film, meaning the depth of the die-through channel is slightly greater than the film thickness. Since the film thickness is relatively small, generally around 3-20 micrometers, if a malfunction occurs during film production, causing the film to break before passing through the die-through channel, to ensure production continuity, a traction component, such as a steel wire rope, needs to be fixed at the break point, allowing it to pass through the gap between the traction roller 2 and the suction nozzle 3. If the gap between the traction roller 2 and the suction nozzle 3 is too small, it creates difficulties for maintenance personnel during die-through, severely affecting the efficiency of die-through.

[0055] Based on this, in this embodiment of the invention, the suction nozzle 3 can move relative to the traction roller 2 to move closer to or further away from the traction roller 2, thereby adjusting the size of the gap formed between the suction nozzle 3 and the traction roller 2. During die-cutting, the gap formed between the traction roller 2 and the suction nozzle 3 is increased to facilitate die-cutting by maintenance personnel. After die-cutting, the gap formed between the traction roller 2 and the suction nozzle 3 is increased again to form a die-cutting channel with a depth slightly greater than the film thickness, so as to ensure the suction effect of the suction nozzle 3.

[0056] Figure 4 This is a structural diagram of the part where the traction roller and suction nozzle are located during mold threading. In this embodiment of the invention, the suction nozzle 3 is connected to the drive mechanism and is driven by the drive mechanism to perform linear motion or oscillation. The invention does not specifically limit the driving method of the drive mechanism; it only needs to be able to drive the suction nozzle 3 to move so that the distance between the suction nozzle 3 and the traction roller 2 is sufficient for on-site maintenance personnel to perform mold threading. When driving the suction nozzle 3 to perform linear motion, the drive mechanism can use a power device such as a cylinder or hydraulic cylinder; when driving the suction nozzle 3 to oscillate, the drive mechanism can use a power device such as an oscillating cylinder.

[0057] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A non-contact thin-film liquid removal system, characterized in that, A system for removing residual liquid from a thin film surface using negative pressure suction includes: a suction nozzle, which cooperates with a traction roller for pulling the film to form a film-passing channel; the suction nozzle has a suction channel and an exhaust channel; the suction direction of the suction channel is along the direction from the traction roller to the suction nozzle, and the exhaust direction of the exhaust channel is along the direction from the suction nozzle to the traction roller; and a cyclone separator, which has a gas-liquid inlet, a gas outlet, and a liquid outlet; the gas-liquid inlet is connected to the suction channel pipe, the gas outlet is connected to the exhaust channel pipe, and a vacuum pump is installed on the pipe between the gas outlet and the exhaust channel. The suction nozzle includes a suction nozzle body, the inner cavity of which forms an air intake channel and an air exhaust channel that are not interconnected. One end of the suction nozzle body has an arc surface that matches the shape of the traction roller, and the arc surface cooperates with the outer peripheral surface of the traction roller to form the film penetration channel. An air intake and two exhaust ports are provided through the arc surface, extending along its length. The air intake is located in the middle of one end of the liquid suction nozzle body and is connected to the air intake channel. The two exhaust ports are respectively located on both sides of the width direction of the air intake and are connected to the exhaust channel.

2. The non-contact thin-film liquid removal system according to claim 1, characterized in that: Both the air intake and exhaust ports are slit-shaped structures.

3. The non-contact thin-film liquid removal system according to claim 1, characterized in that: The main body of the suction nozzle has a cone-shaped structure, the exhaust port has a narrow slit-shaped structure, the air intake channel has a cone-shaped structure and penetrates the arc surface of the main body of the suction nozzle. The cross-sectional area of ​​the air intake channel in the vertical direction gradually decreases as it moves away from the traction roller.

4. The non-contact thin-film liquid removal system according to claim 2, characterized in that: The air intake channel is connected to the gas-liquid inlet of the cyclone separator via an air intake hose. The exhaust channel is connected to an exhaust hose, which is fitted over the outside of the air intake hose. The end of the exhaust hose facing away from the main body of the suction nozzle is installed on a manifold connector. One end of the air intake hose passes through the manifold connector and is connected to the gas-liquid inlet of the cyclone separator. An exhaust extension pipe is also installed on the manifold connector. One end of the exhaust extension pipe is connected to the fittings on the cyclone separator and is connected to the exhaust hose via the manifold connector.

5. The non-contact thin-film liquid removal system according to claim 3, characterized in that: The exhaust direction of the exhaust port is perpendicular to the exhaust direction of the intake channel.

6. The non-contact thin-film liquid removal system according to any one of claims 1 to 4, characterized in that: The inner surface of the cyclone separator shell is coated with a hydrophobic coating or material.

7. The non-contact thin-film liquid removal system according to claim 1, characterized in that: The suction nozzle is connected to the drive mechanism and is driven by the drive mechanism to perform linear motion or oscillation, so that the suction nozzle moves closer to or away from the traction roller.

8. The non-contact thin-film liquid removal system according to claim 1, characterized in that: The number of suction nozzles is at least two, and they are respectively arranged on both sides of the membrane surface of the membrane; the liquid outlet of the cyclone separator is connected to the washing tank pipe, and a filter is installed on the pipe between the cyclone separator and the washing tank.

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