Outer-layer coating tubular microfiltration membrane as well as preparation method and assembly thereof

Abstract

The invention discloses an outer-layer coating tubular microfiltration membrane. The outer coating tubular microfiltration membrane comprises a macromolecular microporous filter tube, wherein one endof the macromolecular microporous filter tube is sealed, and only the outer layer and micropores of the macromolecular microporous filter tube are coated with tubular microfiltration membranes adopting an anchored structure. The outer-layer coating tubular microfiltration membrane has the advantages of high strength, long service life, high filling density and the like. An assembly of the outer-layer coating tubular microfiltration membrane is operated in external pressure type and dead-end filtration manners, the proportion of concentrated water to produced water can be adjusted, backwashingand aeration can be conducted periodically, the chemical cleaning cycle of the membrane assembly can be prolonged, and the energy consumption and the wastewater treatment cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of separation membranes, in particular to an outer coating membrane tubular microfiltration membrane, a preparation method and components thereof. Background technique [0002] With the development of membrane technology, more and more membrane separation technologies are applied in the water treatment industry, and the membrane is generally realized in the form of membrane modules in the process of application. A device that is assembled in a basic unit device in some form and then separated from the components of the mixture under the action of an external driving force. According to the shape of the membrane, the membrane can be divided into flat membrane, hollow fiber membrane, roll membrane, tubular membrane, etc. In terms of filtration accuracy, it can be divided into microfiltration membrane, ultrafiltration membrane, nanofiltration membrane and RO membrane . The tubular microfiltration membranes wi...

AI Technical Summary

Problems solved by technology

The tubular microfiltration membranes with polymer microporous products such as PE as the supporting framework are all prepared by the method of inner coating, that is, the inner surface of the tubular microfiltration membrane is a dense layer, and the internal pressure cross-flow filtration method is often used during use. , can be used to treat wastewater with high solid content, but when used to treat wastewater with low solid content, high organic matter, and high bacteria, the flux is low, energy consumption is high, and wastewater treatment costs are high

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