Nanofiltration membrane filament production device and process

Abstract

The invention provides a nanofilration membrane filament production device and process. The nanofilration membrane filament production device comprises a horizontal workbench, a base, membrane castingsolution conveying pump, a hydraulic regulating valve, a membrane casting solution container, a membrane casting solution conveying pipe, membrane casting solution spraying cavities, base plates, a membrane casting solution assisting cavity, a membrane casting solution assisting pipe, an assisting regulating valve and an assisting pump and is characterized in that the membrane casting solution spraying cavities are symmetrically arranged on two sides of the base, the membrane casting solution assisting cavity is arranged on the base and located at a middle position between the membrane casting solution spraying cavities on two sides, the membrane casting solution spraying cavities on two sides are parallel with the membrane casting solution assisting cavity, the base plates are arranged between the membrane casting solution spraying cavities and the membrane casting solution assisting cavity in a stacked manner, and a gap of a certain thickness is formed between every two base plate through a thickness adjusting device. The nanofilration membrane filament production device has the advantages that a membrane casting solution reaction chambers are formed by the base plates with stacking gaps of standard thickness, the produced nanofiltration membranes are extremely high in flatness, the problems such as pitted surfaces and pits are avoided, the thickness of the nanofiltration membranes can be accurately measured through the thickness adjusting device, and nanofiltration membrane thickness uniformity is guaranteed.

Description

technical field [0001] This patent relates to the technical field of nanofiltration membrane preparation, in particular to a nanofiltration membrane filament preparation device and production process with adjustable thickness. Background technique [0002] With the rapid development of science and technology, consumers' requirements for quality of life are constantly improving, especially in the field of daily life. The quality and safety of drinking water are more and more concerned by consumers. There are various water purification equipment on the market. Into thousands of households, and nanofiltration membrane filter element plays a vital role in filtering water quality, the production quality of nanofiltration membrane directly affects the removal of organic matter, pigments and some dissolved salts in water, and nanofiltration membrane The flatness and thickness of the nanofiltration membrane directly affect the water treatment effect of the nanofiltration membrane. T...

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Problems solved by technology

[0003] In the prior art, the patent with the publication number CN201930900U discloses a coating device for manufacturing a uniform nano-film in a large area. The device sprays the coating through the coating outlet on the coating container, and the coating is sprayed on the surface of the glass on the conveyor belt. , a coating layer is formed on the upper surface of the glass, and the uniformity of the coating layer is related to the flow rate of the jet fluid and the speed of the conveyor belt, and the thickness of the coating layer cannot be measured in real time, the fluid flow rate is too large or the speed of the conveyor belt is too small , it is easy to cause the thickness of the coating layer to be too large, on the contrary, it is easy to cause the thickness of the coating layer to be too small, and it is impossible to produce a film with a specific thickness as required. Pimples and pits affect the flatness of the film

[0004] In the prior art, the patent with publication number CN206746918U discloses a thin film preparation device, which can be used for the preparation of reverse osmosis membrane or nanofiltration membrane. The adjustment mechanism controls the thickness of the film, and the film thickness is adjusted through two sets of air knife components. The thickness adjustment mechanism is a film thickness adjustment roller, which is a cylindrical structure. When the film thickness adjustment roller contacts the film, the cylindrical film thickness adjustment After the film is extruded by the roller, the upper surface of the extruded film will produce a continuous arc along the direction of travel, which is not a regular plane shape, that is, the film after the film thickness adjustment mechanism is not a uniform plane. In addition, the air knife When the component is correcting the thickness of the film, the air knife is at a certain angle with the film, which is easy to scrape the film away from the substrate and cause certain damage to the film

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