1、 Principle of microporous membrane filtration

Microporous membrane filtration technology is a method of separating specific substances through a sieving process using uniformly distributed pore sizes on microporous membranes (typically ranging from 0.1 micrometers to 10 micrometers). Under the action of static pressure difference, solvents, small molecular substances, etc. in the raw material liquid can pass through the microporous membrane, while larger solid particles, microorganisms, etc. are intercepted, thus achieving material separation. Micro porous membrane technology is based on the principle of sieving, which achieves the separation of particles of different sizes in the solution by precisely controlling the pore size of the membrane.

2、 Characteristics of microporous membrane

Small and uniform pore size: The pore size distribution of the microporous membrane is uniform, which can effectively remove small solid particles, microorganisms, etc. from the fluid.

Strong retention ability: Micro porous membranes have strong retention ability and can efficiently remove impurities from fluids.

High filtration accuracy: The pore size distribution of the microporous membrane is basically normally distributed, with high filtration accuracy and separation efficiency.

Good stability: The microporous membrane has excellent chemical stability and mechanical strength, and can maintain stable filtration performance in harsh environments.

Diverse materials: Microporous filter membranes are usually made of polymer materials such as polypropylene (PP), polytetrafluoroethylene (PTFE), polyether sulfone (PES), and nylon (PA), which have excellent chemical stability, mechanical strength, and temperature resistance.

3、 Application of microporous filter membrane

Micro porous membrane technology has a wide range of applications in fields such as water treatment, pharmaceuticals, and food processing.

Water treatment: used to remove suspended solids, colloids, bacteria and other impurities from water, and improve water quality.

Pharmaceutical: In the pharmaceutical industry, microporous membranes can be used for processes such as drug purification, concentration, and sterilization to ensure the purity and safety of drugs.

Food processing: In the field of food processing, microporous membranes can be used for processes such as juice clarification and alcohol filtration to remove suspended solids, microorganisms, and odor impurities from food.

4、 Operation precautions

Pre treatment: Before entering the microporous membrane filter, pre-treatment is usually required, such as sedimentation, flocculation, and coarse filtration, to remove most of the suspended solids and large particles, reduce the burden on the microporous membrane, and extend its service life.

Choose the appropriate pore size: Select the appropriate pore size according to the filtration requirements to ensure the effectiveness and efficiency of the filtration.

Operating pressure control: Appropriate operating pressure can improve filtration speed and efficiency, but excessive pressure may cause membrane damage or compaction, affecting filtration efficiency.

Regular cleaning: As filtration progresses, more and more particles will accumulate on the membrane surface, leading to a decrease in membrane permeability. At this point, it is necessary to stop and clean the surface of the membrane or replace the membrane.

Storage and maintenance: Microporous filter membranes are flammable, and attention should be paid to sealing, moisture prevention, and fire prevention during storage. After use, it should be stored in a suitable solution to prevent drying and contamination.

The microporous membrane filtration technology has been widely used in multiple fields due to its high efficiency, precision, and stable filtration performance. During use, attention should be paid to operational details and maintenance to ensure long-term stable operation and filtration efficiency.