Preparation device of composite separation membrane

Abstract

The invention relates to a preparation device of a composite separation membrane. The preparation device comprises two material winding and unwinding frames, a reaction frame, two solution tanks, a liquid level control roller group, two thin film drying boxes and a post-treatment water tank, wherein the two winding and unwinding frames are respectively arranged at the front end and the back end of the device, the solution tanks and the liquid level control roller group are mounted in the reaction frame, the two solution tanks are respectively arranged on the two sides of the liquid level control roller group, and the two thin film drying boxes are respectively arranged on the two sides of the post-treatment water tank; and the composite separation membrane sequentially connects the first material winding and unwinding frame, the reaction frame, the first solution tank, the liquid level control roller group, the second solution tank, the first thin film drying box, the post-treatment water tank, the second thin film drying box and the second material winding and unwinding frame through a transition guide roller. The device provided by the invention has the characteristics of compact structure, capability of precisely controlling the content of a solution adsorbed in a support body and relatively high drying efficiency, and the obtained composite separation membrane has good physical properties.

Description

technical field [0001] The invention relates to a preparation device for a composite separation membrane, in particular to a device for preparing a composite separation membrane by using an interface polymerization method. Background technique [0002] Membrane technology is a new type of separation technology, which has developed rapidly in recent decades and has been widely used in water treatment, chemical industry, biology, medicine, food and other fields. The interfacial polymerization method prepares composite membranes by using two highly reactive monomers to undergo polymerization reactions at the interface of two mutually incompatible solvents, thereby forming a very thin dense layer on the porous support. [0003] Utilizing interfacial polymerization is the main membrane preparation method. The specific process is to immerse the support body (usually a microfiltration or ultrafiltration membrane) in a solution A containing an active monomer a, discharge the excess ...

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Problems solved by technology

This structure has the following problems: 1. Since there is no liquid volume control structure, the A solution is naturally cast and distributed. Due to the surface tension of the liquid, the solution content of the A solution on the surface of the substrate cannot be guaranteed to be uniform, and the chemical reaction of different amounts of the solution causes desalination. The desalination layer is unstable; 2. The desalination layer is relatively fragile at the initial stage of reaction, and the transition roller in the film drying oven is easy to damage its surface, and the slow drying speed affects production efficiency; 3. The independent post-treatment water tank makes annealing and tempering process structures scattered, not compact

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