Do you know how to classify ceramic membranes?

Ceramic membrane is mainly used in a wide range in the early 20th century. It is a membrane element made of inorganic ceramic materials. It has high separation efficiency, stable effect, good chemical stability, acid and alkali resistance, organic solvent resistance, bacterial resistance, high mechanical strength, good regeneration performance, simple separation process, low energy consumption and other performance advantages, and is widely used in food processing industry, bioengineering, petrochemical industry, metal smelting and other industries.

There are many kinds of ceramic membrane, which can be classified according to the pore size, membrane material and membrane configuration:

1. Classification by aperture

The pore size of inorganic ceramic membrane is generally at or below the micron level. According to the different filter pore size (or the size of intercepted molecular weight), inorganic ceramic membrane can be divided into microfiltration membrane, ultrafiltration membrane and nanofiltration membrane. At present, the inorganic ceramic membranes that have formed industrial scale applications are mainly microfiltration ceramic membranes and ultrafiltration ceramic membranes. The nanofiltration ceramic membranes with smaller pore size range and higher separation accuracy are still in the research stage of large-scale preparation technology in China.

2. Classification by material

The material of inorganic ceramic membranedetermines the physical and chemical properties of the membrane, and then determines the main performance indicators of the ceramic membrane, such as hydrophilicity, pollution resistance, high temperature resistance, acid and alkali resistance, and thermal stability. According to the different materials used to prepare inorganic ceramic membranes, they can be divided into alumina (Al2O3), zirconia (ZrO2), titanium oxide (TiO2) and silicon oxide (SiO2) ceramic membranes.

3. Classification by configuration

The configuration of inorganic ceramic membrane is related to its manufacturing process, which is usually divided into sheet membrane, plate membrane and tubular membrane. Among them, the multi-channel tubular membrane is suitable for large-scale industrial applications and has become the main variety of the enterprise market due to its advantages of larger film area per unit volume, high mechanical strength of the tube body and easy installation. A single (root) membrane tube is called a membrane element. The commercialized inorganic ceramic membrane element can be further divided into various configurations according to the different parameters such as the length of the tube, the number of channels, and the diameter of the tube diameter.