Water treatment functional membrane automatic production all-in-one machine

Abstract

This invention relates to the field of thin film production equipment technology, and in particular discloses an automated integrated machine for producing water treatment functional membranes, comprising: a film supply roller for supplying base film, an immersion coating tank, a coating device, a reaction chamber, and a film receiving roller; the film supply roller is located near the outside of the immersion coating tank, and the outlet of the immersion coating tank is located near the coating device; a reaction plane is provided directly above the reaction chamber, and film inlets and outlets are respectively provided at both ends of the reaction chamber; the coating device is located at the top near the film inlet; a drying device is provided at the other end of the reaction chamber, and a liquid leveling device is provided at the top of the reaction plane; thus, the automated production of water treatment functional membranes is effectively realized, and the interfacial polymerization reaction of the coating is fully carried out, ensuring production quality.

Description

Technical Field

[0001] This invention relates to the field of thin film production equipment technology, and in particular to an automatic integrated machine for producing water treatment functional membranes. Background Technology

[0002] Water treatment membranes are a special type of filtration membrane that separates solid particles, dissolved substances, and suspended solids from water using physical or chemical methods, thereby purifying and reusing the water. Existing functional membrane materials are a new type of highly efficient separation material. Based on their structure and functional characteristics, they can be divided into various types, including but not limited to reverse osmosis membranes, nanofiltration membranes, ultrafiltration membranes, microfiltration membranes, and special functional membranes. Functional membrane materials are widely used in the field of water treatment, not only effectively removing pollutants from water and improving water quality, but also playing an important role in air pollution control, solid waste treatment, and ecological restoration, thereby enhancing the water treatment membrane's functionality in purifying water and recovering resources.

[0003] Interfacial polymerization for membrane fabrication is a method of preparing membranes by a polycondensation reaction occurring at the interface of two immiscible solutions containing two different monomers. Specifically, two highly reactive monomers are in immiscible solvents, such as an aqueous phase and an organic phase. When these two phases come into contact, a polymerization reaction occurs at the interface between the two monomers. The polymer obtained during the polymerization reaction is insoluble in the solvent and precipitates at the interface, forming a thin, dense layer on the porous support as a membrane structure. In the preparation process, the support is first immersed in an aqueous solution containing one active monomer to ensure full wetting. After draining the excess solution, it is then immersed in an organic phase containing another active monomer. The two monomers react with each other on the surface of the support to form a dense polymer skin, ultimately forming a composite membrane. This improves the permeability and selectivity of the treatment membrane. When coating existing interfacial polymer membranes manually, it is difficult to ensure uniform coating, and the low efficiency of manual coating makes it unsuitable for continuous production. Although using coating equipment can improve work efficiency, existing coating equipment mainly uses slit and scraping methods. The slit and scraping coating heads cannot ensure coating saturation, and because the organic phase coating solution has a certain viscosity, it is difficult to control the output of the coating head, which easily leads to uneven coating and is not suitable for producing water treatment functional membranes.

[0004] Referring to Chinese utility model patent publication number "CN214764580U" entitled "A Coating Apparatus for Preparing Composite Films by Interfacial Polymerization," this patent discloses "a coating apparatus for preparing composite films by interfacial polymerization, comprising, sequentially arranged from the starting end of the preparation apparatus, a bottom film unwinding shaft, a polyamine aqueous solution immersion coating device, a front air knife, a back extrusion roller, a closed space, an organic solvent collection tank, and a drying channel. Supporting guide rollers are provided between each device to support the composite film. The polysulfone porous supporting bottom film is passed through the polyamine aqueous solution immersion coating tank at a certain speed via the bottom film unwinding shaft, and then excess amine solution on the surface of the bottom film is removed by the front air knife and the back extrusion roller. It then travels to the closed space with the front side of the film facing upwards for the polymerization reaction. After the composite film exits the closed space, it travels around once to the upper drying oven, at which point the organic solvent collection tank arranged below..." The membrane is used to collect excess solution, leaving very little residual solution and solvent on the membrane surface. It then enters the drying channel, and finally proceeds to the clarification, coating, and dry membrane preparation stages until winding is completed. While this technology can produce polyamide composite reverse osmosis membranes using interfacial polymerization, the washing process damages the coating reaction surface, resulting in insufficient coating curing time. Furthermore, the equipment primarily uses slot coating, which cannot ensure saturation of the coating solution when applying viscous oil-phase solutions. This leads to incomplete reaction between the aqueous and oil phase solutions, affecting production quality. Therefore, this equipment is unsuitable for producing water treatment composite membranes due to its tendency to cause incomplete reactions, and thus unsuitable for continuous, automated production of water treatment functional membranes.

[0005] Therefore, how to automate the production of water treatment functional membranes is a technical problem that engineers need to solve. Summary of the Invention

[0006] The purpose of this invention is to provide an automated integrated machine for producing water treatment functional membranes, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An automated integrated machine for producing water treatment functional membranes, comprising:

[0009] Film supply rollers, immersion coating tanks, spray coating devices, reaction chambers, and film collection rollers are used to supply base film.

[0010] The film feeding roller is located outside the dip coating tank, and the outlet of the dip coating tank is close to the coating device. A reaction plane is provided directly above the reaction chamber. The two ends of the reaction chamber are respectively provided with a film inlet and a film outlet. The film receiving roller is located outside the film outlet. The two ends of the reaction plane are respectively aligned with the film inlet and the film outlet. The coating device is located at the top near the film inlet. A drying device is provided at the other end of the reaction chamber.

[0011] The coating device includes an overflow arc plate, which has an inlet arc groove and an outlet arc groove inside. Both ends of the inlet arc groove have openings for the coating liquid to enter. The outlet arc groove is adjacent to the inlet arc groove, and the horizontal height of the outlet arc groove is less than that of the inlet arc groove. The overflow arc plate is horizontally placed on top of the reaction plane.

[0012] A liquid leveling device is provided at the top of the reaction plane. The liquid leveling device is adjacent to the coating device. The liquid leveling device includes a liquid leveling roller and a support plate assembly. A lifting slide plate is movably provided on the outside of the support plate assembly. The end of the liquid leveling roller is rotatably mounted on the lifting slide plate. A drive mechanism is provided on the outside of the lifting slide plate. The power output end of the drive mechanism is connected to one end of the liquid leveling roller.

[0013] Preferably, the reaction chamber is provided with connecting vertical plates on both sides of its exterior, and each of the two connecting vertical plates is provided with an adjustment mechanism connected to the overflow arc plate on its opposite side. The adjustment mechanism is used to control the lifting height of the overflow arc plate.

[0014] Preferably, the film outlet end of the film supply roller is provided with a traction device, which includes a tension guide roller and a lifting guide roller. The lifting guide roller is movably located directly below the tension guide roller, and both ends of the lifting guide roller are connected to lifting cylinders. The power output end of the lifting cylinder is connected to both ends of the lifting guide roller, and the lifting cylinder is used to control the lifting height of the lifting guide roller.

[0015] Preferably, the dip coating tank is provided with a plurality of guide rollers, which are evenly arranged inside the dip coating tank, and the dip coating tank is provided with a scraper, the inclined surface of which faces the outside of one of the guide rollers.

[0016] Preferably, the air-drying device includes a solid-liquid air knife and a scraper protrusion. The solid-liquid air knife is located on top of the scraper protrusion, and the scraper protrusion is located directly below the reaction plane. The outward protrusion of the scraper protrusion is aligned with the air outlet of the solid-liquid air knife.

[0017] Preferably, the adjustment mechanism includes a lifting assembly and a sliding plate. The power output end of the lifting assembly is connected to the top of the connecting vertical plate. The sliding plate is movably mounted on the connecting vertical plate and is fixedly connected to the end of the overflow arc plate. The lifting assembly is used to control the lifting height of the sliding plate.

[0018] Preferably, the top of the reaction chamber is provided with a plurality of guide rollers, which are spaced apart along the membrane exit direction of the reaction chamber, and the top of each of the guide rollers is tangent to the bottom of the reaction plane.

[0019] Preferably, the bottom of the reaction chamber is inclined downwards, and the bottom of the reaction chamber is provided with a drain hole for recovering the coating liquid.

[0020] Preferably, the support plate assembly includes two opposing support plates, which are respectively located on the outer sides of the reaction chamber. An adjusting screw is rotatably mounted on the support plate, and the end of the adjusting screw is connected to the top of the lifting slide plate.

[0021] Preferably, each of the guide rollers has a bearing seat at both ends, and the bearing seats of two of the guide rollers are elastically connected and respectively located at both ends of the reaction chamber.

[0022] Compared with the prior art, the present invention provides an integrated automatic production machine for water treatment functional membranes, which has the following advantages: It is equipped with a film supply roller for supplying the base membrane, an immersion coating tank, a coating device, a reaction chamber, and a film receiving roller; the film supply roller is positioned near the outside of the immersion coating tank, and the outlet of the immersion coating tank is close to the coating device, allowing the base membrane to enter the immersion coating tank for thorough immersion in the aqueous solution. The base membrane, coated with the aqueous solution, can be placed at the bottom of the coating device through the outlet, where it undergoes overflow coating. A reaction plane for conveying the coating base membrane is provided directly above the reaction chamber, with a film inlet and a film outlet at each end of the reaction chamber, aligning the two ends of the reaction plane with the film inlet and outlet. A drying device is provided at the other end of the reaction chamber, placing the coating device at the top near the film inlet. In this process, when a base film containing an aqueous solution passes through the inlet of the coating device, it is coated with a liquid by the coating device. The coating device includes an overflow arc plate. An inlet arc groove and an outlet arc groove are set inside the overflow arc plate. Openings for the coating liquid to enter are set at both ends of the inlet arc groove. The outlet arc groove is adjacent to the inlet arc groove and the horizontal height of the outlet arc groove is less than that of the inlet arc groove. This allows the coating liquid on the inlet arc plate to overflow into the outlet arc groove. Since the overflow arc plate is horizontally placed at the top of the reaction plane, the coating liquid overflows from the outlet arc groove onto the surface of the base film containing the aqueous solution, saturating the surface of the base film with the aqueous solution with the coating liquid. The coating liquid then moves along the reaction plane to the drying device. During the transportation process, the interfacial polymerization reaction is fully carried out. Finally, the drying device dries and cures the fully reacted coating on the surface of the base film.

[0023] During the reaction process, a liquid leveling device is installed at the top of the reaction plane, adjacent to the coating device. The liquid leveling device includes a liquid leveling roller and a support plate assembly. A lifting slide plate is movably installed on the outside of the support plate assembly. A liquid leveling roller and a drive mechanism are installed outside the lifting slide plate, rotating the liquid leveling roller on the lifting slide plate. The power output end of the drive mechanism is connected to one end of the liquid leveling roller, thereby enabling the drive mechanism to drive the liquid leveling roller to rotate. The liquid leveling roller scrapes off excess saturated coating liquid after sufficient reaction on the reaction plane, preventing excessive coating and ensuring uniform coating. The overall structure effectively realizes the automated production of water treatment functional membranes, suitable for continuous production, improving work efficiency while ensuring sufficient reaction between the oil phase coating and the aqueous phase solution, ensuring uniform reaction coating, and ensuring the production quality of water treatment functional membranes. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 This is a schematic diagram of the overall internal structure of the present invention.

[0027] Figure 3 This is a schematic diagram of the coating device and the liquid homogenizing device in this invention.

[0028] Figure 4 This is a schematic diagram of the film supply roller and traction device in this invention.

[0029] Figure 5 This is a schematic diagram of the internal structure of the immersion coating tank in this invention.

[0030] Figure 6 This is a schematic diagram of the traction device from another perspective in this invention.

[0031] Figure 7 This is a schematic diagram of the overflow arc plate structure in this invention.

[0032] As indicated by the labels in the diagram: 1. Film feeding roller; 2. Dipping tank; 3. Coating device; 4. Reaction chamber; 5. Film receiving roller; 6. Liquid distribution device; 7. Drying device; 8. Adjusting mechanism; 9. Traction device; 21. Guide roller; 22. Scraper; 31. Overflow arc plate; 40. Reaction plane; 43. Connecting vertical plate; 44. Guide roller; 61. Liquid distribution roller; 63. Lifting slide plate; 64. Drive mechanism; 71. Solid-liquid air knife; 72. Scraper protrusion; 81. Lifting assembly; 82. Sliding plate; 91. Tensioning guide roller; 92. Lifting guide roller; 93. Lifting cylinder; 311. Inlet arc groove; 312. Outlet arc groove; 621. Support plate; 622. Adjusting screw. Detailed Implementation

[0033] Preferred embodiments of the present application will now be described in more detail with reference to the accompanying drawings. Although preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0034] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0035] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0036] In the description of this application, it should be understood that the terms "thickness," "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly including one or more of the feature.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0039] refer to Figures 1 to 7 An automated integrated machine for producing water treatment functional membranes, comprising:

[0040] The film supply roller 1, the dipping tank 2, the coating device 3, the reaction chamber 4, and the film take-up roller 5 are used for supplying base film.

[0041] The film feeding roller 1 is located outside the dip coating tank 2, and the outlet of the dip coating tank 2 is close to the coating device 3. A reaction plane 40 is provided directly above the reaction chamber 4. The two ends of the reaction chamber 4 are respectively provided with a film inlet and a film outlet. The film receiving roller 5 is located outside the film outlet. The two ends of the reaction plane 40 are respectively aligned with the film inlet and the film outlet. The coating device 3 is located at the top near the film inlet. A drying device 7 is provided at the other end of the reaction chamber 4.

[0042] The coating device 3 includes an overflow arc plate 31. The overflow arc plate 31 has an inlet arc groove 311 and an outlet arc groove 312 inside. Both ends of the inlet arc groove 311 are provided with openings for the coating liquid to enter. The outlet arc groove 312 is adjacent to the inlet arc groove 311, and the horizontal height of the outlet arc groove 312 is less than the horizontal height of the inlet arc groove 311. The overflow arc plate 31 is horizontally placed on the top of the reaction plane 40.

[0043] A liquid leveling device 6 is provided at the top of the reaction plane 40. The liquid leveling device 6 is adjacent to the coating device 3. The liquid leveling device 6 includes a liquid leveling roller 61 and a support plate assembly. A lifting slide plate 63 is movably provided on the outside of the support plate assembly. The end of the liquid leveling roller 61 is rotatably mounted on the lifting slide plate 63. A drive mechanism 64 is provided on the outside of the lifting slide plate 63. The power output end of the drive mechanism 64 is connected to one end of the liquid leveling roller 61.

[0044] Specifically, both sides of the reaction chamber 4 are provided with connecting vertical plates 43, and each of the two connecting vertical plates 43 is provided with an adjustment mechanism 8 connected to the overflow arc plate 31 on the opposite side. The adjustment mechanism 8 is used to control the lifting height of the overflow arc plate 31.

[0045] Specifically, the film-feeding roller 1 is provided with a traction device 9 at the film-exit end. The traction device 9 includes a tensioning guide roller 91 and a lifting guide roller 92. The lifting guide roller 92 is movably disposed directly below the tensioning guide roller 91, and both ends of the lifting guide roller 92 are connected to lifting cylinders 93. The power output end of the lifting cylinder 93 is connected to both ends of the lifting guide roller 92. The lifting cylinder 93 is used to control the lifting height of the lifting guide roller 92.

[0046] Specifically, the interior of the immersion coating tank 2 is provided with a plurality of guide rollers 21, which are evenly arranged inside the immersion coating tank 2. The interior of the immersion coating tank 2 is provided with a scraper 22, the inclined surface of which faces the outside of one of the guide rollers 21.

[0047] Specifically, the air drying device 7 includes a solid-liquid air knife 71 and a scraper 72. The solid-liquid air knife 71 is located on top of the scraper 72, and the scraper 72 is located directly below the reaction plane 40. The outward protrusion of the scraper 72 is aligned with the air outlet of the solid-liquid air knife 71.

[0048] Specifically, the adjustment mechanism 8 includes a lifting component 81 and a sliding plate 82. The power output end of the lifting component 81 is connected to the top of the connecting vertical plate 43. The sliding plate 82 is movably mounted on the connecting vertical plate 43 and is fixedly connected to the end of the overflow arc plate 31. The lifting component 81 is used to control the lifting height of the sliding plate 82.

[0049] Specifically, the top of the reaction chamber 4 is provided with a plurality of guide rollers 44, which are distributed at intervals along the membrane exit direction of the reaction chamber 4, and the top of each of the guide rollers 44 is tangent to the bottom of the reaction plane 40.

[0050] Specifically, the bottom of the reaction chamber 4 is inclined downwards, and the bottom of the reaction chamber 4 is provided with a drain hole for recovering the coating liquid.

[0051] Specifically, the support plate assembly includes two opposing support plates 621, which are respectively located on the outer sides of the reaction chamber 4. An adjusting screw 622 is rotatably mounted on each support plate 621, and the end of the adjusting screw 622 is connected to the top of the lifting slide plate 63.

[0052] Specifically, each of the guide rollers 44 has a bearing seat at both ends, and the bearing seats of two of the guide rollers 44 are elastically connected and respectively located at both ends of the reaction chamber 4.

[0053] Example 1: To automate the production of water treatment functional membranes using interfacial polymerization, and to ensure the saturation of the coating solution on the base membrane before the interfacial polymerization reaction to guarantee sufficient reaction, existing coating methods cannot ensure sufficient coating solution volume and reaction time, leading to incomplete interfacial polymerization and affecting product quality. In this example: a membrane supply roller 1 for supplying the base membrane, an immersion coating tank 2, a coating device 3, a reaction chamber 4, and a membrane receiving roller 5 are provided; the membrane supply roller 1 is positioned near the outside of the immersion coating tank 2, and the immersion coating tank 2... The discharge port is close to the coating device 3, allowing the base film to enter the immersion tank 2 for thorough immersion in the aqueous solution. The base film, coated with the aqueous solution, is positioned at the bottom of the coating device 3 via the discharge port, where it undergoes an overflow coating action. A reaction plane 40 for conveying the coating base film is provided directly above the reaction chamber 4. The reaction chamber 4 has a film inlet and a film outlet at both ends, aligning the two ends of the reaction plane 40 with the film inlet and outlet. A drying device 7 is provided at the other end of the reaction chamber 4, positioning the coating device 3 close to the film inlet. At the top of the inlet, when the base film containing the aqueous solution passes through the inlet opening of the coating device 3, it is coated by the coating device 3. The coating device 3 includes an overflow arc plate 31. An inlet arc groove 311 and an outlet arc groove 312 are provided inside the overflow arc plate 31. Both ends of the inlet arc groove 311 have openings for the coating liquid to enter, making the outlet arc groove 312 adjacent to the inlet arc groove 311. Since the horizontal height of the outlet arc groove 312 is less than the horizontal height of the inlet arc groove 311, the coating liquid overflows. The arc plate 31 is horizontally placed on top of the reaction plane 40, and the coating liquid overflows from the liquid outlet arc groove 312 onto the surface of the base film containing the aqueous solution, saturating the surface of the base film with the aqueous solution with the coating liquid. It then moves along the reaction plane 40 to the drying device 7, where the interfacial polymerization reaction is fully carried out during the conveying process. Finally, the drying device 7 dries and cures the fully reacted coating on the surface of the base film, and the film take-up roller 5 performs the winding action, completing the automated production of water treatment functional membranes. It is suitable for continuous production, improving production efficiency while ensuring production quality.

[0054] It should be noted that a liquid supply device can be installed outside the coating device 3. The liquid supply device supplies the coating liquid to the opening of the liquid inlet arc groove 311 through a pipeline. When the coating liquid in the liquid inlet arc groove 311 exceeds the plane height of the liquid inlet arc groove 311, the coating liquid will overflow into the interior of the liquid outlet arc groove 312 until the coating liquid exceeds the plane height of the liquid outlet arc groove 312 and overflows to coat the aqueous solution-based film on the reaction plane 40.

[0055] It should be noted that in this embodiment, an over-coating method is used to apply excess coating to the surface of the base film to ensure that the coating is saturated so that the organic phase coating can fully contact the aqueous phase to achieve a full reaction. When moving on the reaction plane 40, the reaction time is ensured so that the interfacial polymerization reaction can be fully carried out.

[0056] It should also be noted that by providing connecting vertical plates 43 on both sides of the reaction chamber 4, and providing adjusting mechanisms 8 connected to overflow arc plates 31 on the opposite side of the two connecting vertical plates 43, the lifting height of the overflow arc plates 31 can be controlled by adjusting the lifting height of the overflow arc plates 31. By controlling the lifting height of the overflow arc plates 31, the distance between the overflow arc plates 31 and the reaction chamber 4 can be adjusted, thereby adjusting the distance between the overflow arc plates 31 and the base film on the reaction plane 40. The amount of coating overflowing from the overflow arc plates 31 flows stably, and the closer the overflow arc plates 31 are to the reaction plane 40, the more coating is applied, and the farther the overflow arc plates 31 are from the reaction plane 40, the less coating is applied. This adjusting mechanism 8 can be used for overflow saturation coating of base films with different thicknesses.

[0057] In addition to the above description, it should be noted that the adjustment mechanism 8 includes a lifting component 81 and a sliding plate 82. The power output end of the lifting component 81 is connected to the top of the connecting vertical plate 43, so that the sliding plate 82 is movably mounted on the connecting vertical plate 43. The sliding plate 82 is also fixedly connected to the end of the overflow arc plate 31. Therefore, the lifting component 81 can be used to control the lifting height of the sliding plate 82. The lifting component 81 can be mainly a screw jack structure. The screw jack can accurately control and adjust the lifting or pushing height according to a certain program. It can be directly driven by an electric motor or other power, or it can be adjusted manually.

[0058] In Example 2, to automate the straight entry of the base film into the dipping tank 2, the base film is dipped in the dipping tank 2 with an aqueous solution to ensure sufficient wetting of the base film, so that the subsequent aqueous solution and saturated coating solution can fully react. In this example: a film supply roller 1 for supplying the base film and a dipping tank 2 are provided. The film supply roller 1 is positioned near the outside of the dipping tank 2. A traction device 9 is provided at the film exit end of the film supply roller 1. The traction device 9 includes a tension guide roller 91 and a lifting guide roller 92. The lifting guide roller 92 is movably positioned directly below the tension guide roller 91. Lifting cylinders 93 are connected to both ends of the lifting guide roller 92, so that the lifting cylinders 93... The power output end is connected to both ends of the lifting guide roller 92. The lifting height of the lifting guide roller 92 can be controlled by the lifting cylinder 93. When it is necessary to perform a base film tensioning action on the film outlet end of the film supply roller 1, the lifting cylinder 93 can drive the lifting guide roller 92 to descend, thereby increasing the distance between the lifting guide roller 92 and the tensioning guide roller 91. This achieves a straight traction effect before the base film enters the dipping tank 2 through the lifting guide roller 92 and the tensioning guide roller 91, ensuring that the base film can enter the dipping tank 2 straight. The base film is then soaked in the aqueous solution inside the dipping tank 2, allowing the surface of the base film to be fully wetted, so as to facilitate a full interfacial polymerization reaction with the coating liquid in the future.

[0059] In this embodiment, excess water needs to be removed from the surface of the base film containing water. Since the base film is immersed in the dipping tank 2, to prevent excessive moisture on the surface, excess moisture needs to be removed before the wetted base film enters the coating device 3. Furthermore, several guide rollers 21 are evenly arranged inside the dipping tank 2. A scraper 22 is also provided inside the dipping tank 2, with its inclined surface facing the outside of one of the guide rollers 21. The base film is guided into the traction device 9 by the guide rollers 21, maintaining tension within the dipping tank 2. This ensures the base film can fully contact the aqueous solution inside the dipping tank 2, allowing its surface to be fully wetted. Before exiting the coating device 3, the scraper 22 removes excess water from the base film surface, preventing dripping water as the wetted base film moves towards the coating device 3 and ensuring uniform water distribution on the base film surface.

[0060] In Example 3, to automate the scraping off of excess coating from the reaction coating and ensure uniform coating, a dip coating method is used to coat the base film surface containing an aqueous solution. This ensures that the organic phase coating and the aqueous solution fully polymerize and react on the base film surface. However, after the reaction, excess surface coating needs to be removed to ensure uniform coating. In this example, a film supply roller 1, an immersion tank 2, a dip coating device 3, a reaction chamber 4, and a film receiving roller 5 are provided. The film supply roller 1 is positioned near the outside of the immersion tank 2, and the outlet of the immersion tank 2 is near the dip coating device 3, allowing the base film to enter the immersion tank 2 for thorough immersion in the aqueous solution. The base film coated with the aqueous solution is then positioned at the bottom of the dip coating device 3 through the outlet, where it undergoes an overflow coating action. A reaction plane 40 for conveying the coating base film is provided directly above the reaction chamber 4, and the two ends of the reaction chamber 4 are... The reaction plane 40 is equipped with a film inlet and a film outlet, with the two ends of the reaction plane 40 aligned with the film inlet and the film outlet respectively. A drying device 7 is provided at the other end of the reaction chamber 4, and the coating device 3 is located at the top near the film inlet. During the reaction, a liquid leveling device 6 is provided at the top of the reaction plane 40, adjacent to the coating device 3. The liquid leveling device 6 includes a liquid leveling roller 61 and a support plate assembly. A lifting slide plate 63 is movably provided on the outside of the support plate assembly. The liquid leveling roller 61 and a drive mechanism 64 are provided on the outside of the lifting slide plate 63, so that the liquid leveling roller 61 is rotatably mounted on the lifting slide plate 63. The power output end of the drive mechanism 64 is also connected to one end of the liquid leveling roller 61, thereby enabling the drive mechanism 64 to drive the liquid leveling roller 61 to rotate. The liquid leveling roller 61 scrapes off the excess saturated coating liquid after the reaction on the reaction plane 40, preventing excessive coating and ensuring uniform coating.

[0061] It should be noted that by setting several guide rollers 44 on the top of the reaction chamber 4 and distributing them at intervals along the membrane exit direction of the reaction chamber 4, the top of each guide roller 44 is tangent to the bottom of the reaction plane 40. Thus, the guide rollers 44 can support the membrane and ensure that the bottom of the membrane is conveyed in a straight manner.

[0062] It should also be noted that when scraping off excess coating, excess coating liquid will fall into the interior of the reaction chamber 4. The excess coating liquid needs to be recycled. In this embodiment, the bottom of the reaction chamber 4 can be set to a downward tilt to facilitate the collection of excess liquid. Since the bottom of the reaction chamber 4 is provided with a drain hole for recycling coating liquid, the excess liquid can be discharged through the drain hole for centralized recycling.

[0063] It should be noted that the support plate assembly includes two opposing support plates 621, which are respectively located on the outer sides of the reaction chamber 4. An adjusting screw 622 is rotatably mounted on the support plate 621, and the end of the adjusting screw 622 is connected to the top of the lifting slide plate 63. By rotating the adjusting screw 622, the lifting height of the lifting slide plate 63 can be adjusted, thereby controlling the distance between the liquid uniform roller 61 and the reaction plane 40. By adjusting the height of the liquid uniform roller 61, the thickness of the base film interface polymerization reaction layer can be controlled, and the thickness of the surface coating can be controlled according to actual production needs.

[0064] Example 4: To achieve automated and rapid air-drying of the surface polymerization reaction layer of the base film after the interfacial polymerization reaction, since the interfacial polymerization reaction layer is still in an unsolidified state after the reaction on the base film surface, it is necessary to rapidly air-dry the interfacial polymerization reaction layer to facilitate subsequent winding. In this example: an air-drying device 7 is provided at the other end of the reaction chamber 4, and the coating device 3 is located at the top near the film inlet. When the base film containing the aqueous solution passes through the film inlet through the coating device 3, the coating device 3 applies liquid coating to it, saturating the surface of the base film containing the aqueous solution with the liquid coating, and moves it along the reaction plane 40 to approach the air-drying device 7, achieving full interfacial polymerization reaction during the conveying process. After the surface polymerization reaction, the coating on the base film surface is dried and cured by the air drying device 7. The air drying device 7 includes a solid-liquid air knife 71 and a scraper 72. The solid-liquid air knife 71 is placed on top of the scraper 72, and the scraper 72 is located directly below the reaction plane 40. The outer protrusion of the scraper 72 is aligned with the air outlet of the solid-liquid air knife 71. When the base film coated with paint on the reaction plane 40 passes the scraper 72, the scraper 72 can scrape off the excess paint at the bottom of the base film, ensuring the cleanliness of the bottom of the base film. The solid-liquid air knife 71 quickly dries and cures the paint on the surface of the base film after the reaction, so as to facilitate subsequent winding.

[0065] In addition to the above explanation, it should be noted that by setting several guide rollers 44 at the top of the reaction chamber 4, the guide rollers 44 are spaced apart along the membrane exit direction of the reaction chamber 4, and the top of the guide rollers 44 is tangent to the bottom of the reaction plane 40. Thus, the guide rollers 44 can support the bottom of the membrane on the reaction plane 40, and ensure that the membrane remains straight and reacts fully.

[0066] To further define the above description, each of the guide rollers 44 has a bearing seat at both ends. The bearing seats of two guide rollers 44 are elastically connected and respectively located at both ends of the reaction chamber 4. The elastic connection allows the two guide rollers 44 near the ends of the reaction chamber 4 to have a buffering effect. This prevents excessive water drop from the base film containing the aqueous solution before it enters the reaction plane 40 due to excessive force at the corners. It also ensures that when the coating film with the interface contact reaction exits the reaction plane 40, the surface coating will not crack due to excessive force at the corners, thus ensuring production quality.

[0067] The solution of this application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have different emphases; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to this application. Furthermore, it is understood that the steps in the method of this application embodiment can be adjusted, combined, and deleted according to actual needs, and the modules in the device of this application embodiment can be combined, divided, and deleted according to actual needs.

[0068] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A water treatment functional membrane automatic production all-in-one machine, characterized in that, include: Film supply rollers for supplying base film, dip coating tanks, spray coating devices, reaction chambers, and film take-up rollers for winding up; The film feeding roller is located outside the dip coating tank, and the outlet of the dip coating tank is close to the coating device. A reaction plane is provided directly above the reaction chamber. The two ends of the reaction chamber are respectively provided with a film inlet and a film outlet. The film receiving roller is located outside the film outlet. The two ends of the reaction plane are respectively aligned with the film inlet and the film outlet. The coating device is located at the top near the film inlet. A drying device is provided at the other end of the reaction chamber. The coating device includes an overflow arc plate, and the overflow arc plate is provided with an inlet arc groove and an outlet arc groove inside. Both ends of the inlet arc groove are provided with openings for the coating liquid to enter. The outlet arc groove is adjacent to the inlet arc groove, and the horizontal height of the outlet arc groove is less than the horizontal height of the inlet arc groove. The overflow arc plate is horizontally placed on the top of the reaction plane. A liquid leveling device is provided at the top of the reaction plane. The liquid leveling device is adjacent to the coating device. The liquid leveling device includes a liquid leveling roller and a support plate assembly. A lifting slide plate is movably provided on the outside of the support plate assembly. The end of the liquid leveling roller is rotatably mounted on the lifting slide plate. A drive mechanism is provided on the outside of the lifting slide plate. The power output end of the drive mechanism is connected to one end of the liquid leveling roller. Both sides of the reaction chamber are provided with connecting vertical plates, and each of the two connecting vertical plates is provided with an adjustment mechanism connected to the overflow arc plate on the opposite side. The adjustment mechanism is used to control the lifting height of the overflow arc plate. The dip coating tank is equipped with several guide rollers, which are evenly arranged inside the dip coating tank. The dip coating tank is also equipped with a scraper, and the inclined surface of the scraper faces the outside of one of the guide rollers. The air drying device includes a solid-liquid air knife and a scraper plate. The solid-liquid air knife is located on top of the scraper plate, and the scraper plate is located directly below the reaction plane. The outward protrusion of the scraper plate is aligned with the air outlet of the solid-liquid air knife. The film-feeding roller is equipped with a traction device at the film-exit end. The traction device includes a tensioning guide roller and a lifting guide roller. The lifting guide roller is movably located directly below the tensioning guide roller, and both ends of the lifting guide roller are connected to lifting cylinders. The power output end of the lifting cylinder is connected to both ends of the lifting guide roller, and the lifting cylinder is used to control the lifting height of the lifting guide roller. The adjustment mechanism includes a lifting assembly and a sliding plate. The power output end of the lifting assembly is connected to the top of the connecting vertical plate. The sliding plate is movably mounted on the connecting vertical plate and is fixedly connected to the end of the overflow arc plate. The lifting assembly is used to control the lifting height of the sliding plate. The top of the reaction chamber is provided with several guide rollers, which are spaced apart along the film outlet direction of the reaction chamber. The top of each guide roller is tangent to the bottom of the reaction plane. Each of the guide rollers has a bearing seat at both ends, and the bearing seats of two of the guide rollers are elastically connected and respectively located at both ends of the reaction chamber. The bottom of the reaction chamber is inclined downwards, and the bottom of the reaction chamber is provided with a drain hole for recovering the coating liquid; The support plate assembly includes two opposing support plates, which are respectively located on the outer sides of the reaction chamber. An adjusting screw is rotatably mounted on each support plate, and the end of the adjusting screw is connected to the top of the lifting slide plate.

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