Separation membrane carrier and application thereof

Abstract

The invention provides a separation membrane carrier and application thereof. The separation membrane carrier is of a pipe-shaped body; the radial section of the pipe-shaped body is of a sealed polygon shape meeting plane embedding requirements; the outer surface of the pipe-shaped carrier is used for attaching a separation layer. In the application of the separation membrane carrier, the carriermeeting the plane embedding requirements is utilized; when membrane pipe arrangement is carried out in a membrane assembly, the space can be utilized to the greatest extent; a supporting ridge is combined so that the thickness of the carrier can be greatly reduced and the flux and the selectivity are improved; a structure design that the outer surface of a film pipe of the carrier is coated with the separation layer is adopted so that a membrane pipe sleeve is omitted and extremely great convenience is provided for production and maintenance.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, and relates to a separation membrane used for fluid separation. Background technique [0002] The present invention relates to the technical field of separations employing separation elements commonly referred to as membranes. These membranes are generally made of inorganic materials and comprise a porous support and at least one separation layer, the properties and morphology of which are designed to separate molecules or particles contained in the fluid medium to be treated. Membrane separation separates a liquid containing molecules and / or particles into two fractions: a filtrate fraction, which contains molecules or particles that have passed through the filter membrane and thus through the support and the separation layer; and a retentate fraction, which Contains molecules or particles retained by the filter. [0003] Conventionally, a composite separation membrane is defined a...

AI Technical Summary

Problems solved by technology

However, in order to ensure sufficient mechanical strength, the wall thickness of the general separation membrane carrier is usually thicker than 2 mm, which will lead to significant carrier layer transmission resistance, resulting in a decrease in the flux of the separation membrane

In addition, the commonly used supports with circular interfaces cannot achieve a close planar arrangement, so the filling area per unit volume of the final membrane module will be reduced.

[0005] Multi-channel support is also a form of support traditionally used. In order to increase the surface area per unit volume, the separation layer is generally grown on the inner surface of the multi-channel, which will increase the difficulty of coating the separation layer. In addition, this type of separation When the membrane is used, the shell side is the permeate side. For separation systems (such as pervaporation and steam permeation) with a vacuum on the permeate side, a large shell side volume needs to be reserved, which will reduce the packing density of the components.

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