Author: filter manufacturer Technical Support: Guangzhou filter water purification filter Equipment Co., Ltd. R & D

What is a filter?

Membrane is also called a separation membrane. Some people can roughly classify the filter according to its pore size and separation efficiency (from maximum pore size to minimum pore diameter):

Gas Separation Membrane

Dialysis filter (Dialysis/Hemodialysis Membrane)

Reverse Osmosis Membrane

Ultrafiltration Membrane

Microporous Membrane

The application of the global filter membrane began with the desalination project in the 1960s. At present, in addition to large-scale application in seawater, brackish water desalination and pure water, ultrapure water production, due to the high efficiency and environmental protection of filtration, separation, adsorption, diffusion, etc., it is now widely used. Medical technology, chemical engineering, beverage processing, semiconductor electronic processing, water purification, biochemical testing, etc., have become one of the most important high-tech in the field of filtration separation and inspection analysis in biochemical science. In general, filter users use different types of filters depending on their application (filter separation or inspection analysis). For example, the concentration of small molecules usually uses NF or RO filters, while for macromolecules, UF or MF filters are used. Due to their different characteristics and performance, each filter plays an indispensable role in today's diverse scientific and industrial applications.

What is a microporous membrane?

The microporous membrane is structurally analyzed and is a very thin membrane with a porous sponge-like structure. A typical pore size range is from 0.1 micron to 10 microns. Nowadays, the manufacturers of microporous membranes classify them according to their morphological differences:

Flat Sheet Membrane

Hollow Fiber Membrane

Tubular Membrane

Among the above, the "flat thin paper filter" can be further subdivided into "Unsupported flat paper filter" and "supported flat paper filter". If both of them require the required technology, the production of "unsupported flat paper filter" is more sophisticated and complicated than the production of "supported flat paper filter".

Microfiltration is a screening process and is a precision filtration. Microporous precision filtration refers to filtration technology that filters out particles from 0.1 μm to 10 μm. In general, the filtration mechanism is divided into two types: surface type and deep type. Microfiltration is a screening process and is a precision filtration. The filtration mechanism of the MF membrane manufactured by the advanced technology is surface type filtration. Due to the fixed filter aperture, the accuracy and reliability of the filtration are ensured. The deep filtration is divided into a non-fixed irregular aperture and a fixed irregular aperture. The former, such as a chemical fiber winding type filter, is generally only used as a relatively coarse pre-filtration.

Aperture

use

3.0-10.0μm: Security filtering before RO desalination

0.6-0.8μm: high-dose injection, particle filtration in large infusion, beer, beverage filtration, oil-based photoresist, spray solvent, etc.

0.45μm: high-purity water terminal filtration in the electronics industry, filtration of MOS reagents

0.2μm: sterilization filtration of liquid medicine, biological agents and heat sensitive fluids, ultra-pure water terminal filtration in the electronics industry, clarification filtration of low-grade wine

Microporous filtration operation with or without flow (Deadend and crossflow (Crossflow). The former is applied to dilute (solid content) feedstock and smaller scale applications. Filter membranes are made of filter cartridges, mostly disposable. Crossflow operation is also called tangent Flow operation is not very sensitive to changes in suspended particle size and concentration. It is suitable for large-scale applications. The filter modules of such operations need to be periodically cleaned and regenerated frequently.)

Microporous membranes are used in a wide variety of applications. Microporous membranes in many MF applications are often disposable and have a short life. Air filtration microwell assemblies can last up to several months, while filter batch liquid components can last as short as a few hours.

The above information is provided by the filter research and development department of Guangzhou Filter Source Water Purification Equipment Co., Ltd. The domestic production address of Guangzhou filter source filter is located in Mingbotang Industrial Park, Dukou Road, Xinjian Town, Panyu District, Guangzhou. Contact: Mr. Tao Anjian. Welcome customers to visit our factory!