Method for capping tubular ceramic membrane

Abstract

The invention discloses a method for capping a tubular ceramic membrane. The method comprises the following steps: adding a certain amount of membrane layer composition inorganic oxide powder into a Teflon dispersion liquid to fill holes in a Teflon coating layer, and adjusting the aperture size in the coating layer to be consistent with or smaller than the aperture size in a membrane layer, so that the sealing property of the coating layer is improved. According to the invention, firstly, the membrane layer composition inorganic oxide powder is dispersed in a Teflon solution; then the end part of a tubular ceramic membrane is coated with the Teflon solution by adopting a dip coating process; after baking and curing at low temperature, the Teflon coating layer with an average aperture sizeconsistent with the average aperture size of the membrane layer; and the membrane layer composition inorganic oxide powder is introduced into the Teflon coating layer, so that the sealing property ofthe coating layer is improved, interception efficiency of the end part is consistent with interception efficiency of the membrane layer, and overall interception efficiency of the tubular ceramic membrane is improved.

Description

technical field

[0001] The invention belongs to the technical field of ceramic membrane preparation, and in particular relates to a method for capping a tubular ceramic membrane. Background technique

[0002] Inorganic ceramic membrane has high temperature resistance, good chemical stability, acid resistance, alkali resistance, organic solvent resistance, high mechanical strength, reverse flushing, strong anti-microbial ability, narrow pore size distribution, large permeation, high membrane flux, and separation With the characteristics of high efficiency and long service life, it is widely used in chemical industry, metallurgy, food, medicine, environmental protection and other fields. The tubular ceramic membrane produced by the adsorption coating process is the mainstream product in the current market.

[0003] The end of the tubular ceramic membrane, because the coating liquid cannot be completely absorbed during the coating process, and the wet film layer at the end is ...