Flat sheet membrane permeability testing assembly

Abstract

The invention discloses a flat sheet membrane permeability testing assembly which comprises an upper end cover, a lower end cover, a distributor, a membrane and a supporting plate. The distributor is arranged in a cavity formed by the upper end cover and the lower end cover; a feeding cavity is formed by the distributor and the upper end cover; a material permeation cavity is formed by the distributor and the lower end cover; a residual material permeation passage is formed on the distributor; a feeding passage is formed on the upper end cover; the feeding passage is connected with the feeding cavity; a material permeation passage is formed on the lower end cover; the material permeation passage is connected with the material permeation cavity; the membrane is positioned below the distributor; the supporting plate is arranged below the membrane. The membrane assembly disclosed by the invention is simple in structure and compact in design; raw material gas is uniformly dispersed in a membrane separation cavity by utilizing the distributor, and thus, not only are effective distribution of the raw material on the surface of the membrane and separation efficiency of the membrane improved, but also a short circuit phenomenon that in the operating process of the membrane assembly, the raw material gas is not in sufficient contact with the membrane and directly enters the residual material permeation passage is avoided, and meanwhile, a concentration polarization phenomenon on the surface of the membrane also can be inhibited.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, and relates to an experimental device for filtering and separating raw material gas, in particular to a flat membrane gas permeability testing component with reasonable structure, simple and high efficiency. Background technique [0002] Membrane gas separation is a new technology that has developed rapidly in recent years. Depending on the permeability and selectivity of different polymer membrane materials to different types of gas molecules, a certain gas can be selectively separated from the mixed gas. At present, gas membrane separation technology mainly includes oxygen-enriched membrane technology, recovery of light hydrocarbons in refineries and oilfields, hydrogen and nitrogen extraction by membrane method, and VOCs emission control and recovery. Applications. [0003] At present, there are very few membrane modules to evaluate the gas separation performance of flat-panel me...

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Problems solved by technology

[0004] The technical problem to be solved in the present invention is to overcome problems such as concentration polarization and "short circuit" in the application of the flat membrane permeability test assembly in the prior art, and to provide a novel flat membrane permeability test assembly. The distributor forms a circular feed gas channel to regulate the direction of the raw material in the membrane module, which not only effectively suppresses the concentration polarization phenomenon that occurs during the membrane test process, but also avoids the occurrence of insufficient contact of the feed gas with the membrane. The "short circuit" phenomenon in which the flakes directly enter the retentate channel

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