Preparation method of large-caliber columnar ceramic membrane support body and ceramic membrane product thereof

Abstract

The invention discloses a preparation method of a large-caliber columnar ceramic membrane support body. The preparation method comprises the following steps: taking a monomer formed by symmetrically and equally dividing a large-caliber columnar ceramic membrane along the axial direction as a support body unit, firstly preparing the support body unit by extrusion molding; and then splicing and combining to form a ceramic membrane structure with a columnar structure and gaps among the support body units as penetrating fluid channels. In addition, the invention further discloses a large-caliber columnar ceramic membrane product and a preparation method thereof. The large-caliber ceramic membrane is formed by dividing the large-caliber ceramic membrane into the small support body units, carrying out extrusion molding and then combining the small support body units so that the process difficulty of preparing the large-caliber ceramic membrane is reduced, and meanwhile, membrane defects arealso avoided. According to the ceramic membrane configuration adopted by the invention, not only is the process of processing the permeation channels in the later period of the ceramic membrane reduced, but also the permeation distance of the permeation liquid at the membrane surface of the middle pore channel of the large-diameter ceramic membrane is greatly reduced, and compared with the existing large-caliber ceramic membrane configuration, the permeation flux of the large-caliber ceramic membrane is effectively improved.

Description

technical field [0001] The invention relates to the technical field of membrane separation, in particular to a preparation method of a columnar ceramic membrane support body and a ceramic membrane product thereof. Background technique [0002] Inorganic ceramic membranes have the advantages of high temperature resistance, solvent resistance, acid and alkali corrosion resistance, high mechanical strength, easy cleaning and regeneration, and have unique technical advantages in chemical, food, pharmaceutical and other fields. At present, the configurations of ceramic membrane products are mainly single tubular, multi-channel tubular, honeycomb tubular and flat plate. Among them, multi-channel ceramic membranes have been widely used in industry due to their easy port sealing and less membrane fouling. However, the disadvantage of multi-channel ceramic membranes is that the membrane area per unit volume is relatively small, resulting in a high proportion of investment in membran...

AI Technical Summary

Problems solved by technology

For tubular ceramic membranes with a large diameter such as a diameter exceeding 40mm, only hydraulic extruders can be used to extrude intermittently, which is not conducive to product quality control

However, if screw extrusion is adopted, the diameter of the screw rod of the screw extruder must be doubled to ensure a certain screw compression ratio due to the large diameter of the extruded product. At present, there is no related extrusion equipment.

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