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Shenzhen Hongsen Environmental Protection Technology Co., Ltd
ultrafiltration membrane
NegotiableUpdate on 01/16
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Overview
Ultrafiltration membrane is a microporous filtration membrane with consistent pore size specifications and a rated pore size range of 0.001-0.02 microns. By applying appropriate pressure on one side of the membrane, solute molecules smaller than the pore size can be screened out to separate particles with a molecular weight greater than 500 daltons and a particle size greater than 2-20 nanometers. Ultrafiltration membrane is one of the earliest developed polymer separation membranes, and ultrafiltration devices were industrialized in the 1960s. ...
Product Details
The industrial application of ultrafiltration membranes is very extensive and has become one of the new chemical unit operations. Used for separation, concentration, purification of biological products, pharmaceutical products, and food industry; It is also used as a terminal treatment device in blood treatment, wastewater treatment, and ultrapure water preparation. In China, ultrafiltration membranes have been successfully used for the concentration and purification of traditional Chinese medicine. With the advancement of technology, the filtering function of ultrafiltration membranes will inevitably be improved and strengthened, and their contribution to human society will become increasingly significant.
product structure
The structure of ultrafiltration membranes can be classified as symmetrical or asymmetrical. The former is isotropic, without a cortex, and the pores in all directions are the same, belonging to deep filtration; The latter has a relatively dense surface layer and a bottom layer mainly composed of finger like structures, with a surface layer thickness of 0.1 microns or less and ordered micropores, and a bottom layer thickness of 200-250 microns, belonging to surface filtration. The ultrafiltration membrane used in industry is generally an asymmetric membrane. The membrane materials of ultrafiltration membranes mainly include cellulose and its derivatives, polycarbonate, polyvinyl chloride, polyvinylidene fluoride, polysulfone, polyacrylonitrile, polyamide, polysulfone amide, sulfonated polysulfone, cross-linked polyvinyl alcohol, modified acrylic polymer, and so on.
Filtering principle
The ultrafiltration membrane screening process is driven by the pressure difference on both sides of the membrane, using the ultrafiltration membrane as the filtering medium. Under a certain pressure, when the original liquid flows through the membrane surface, the many small pores densely distributed on the ultrafiltration membrane surface only allow water and small molecular substances to pass through, becoming the permeate. The substances in the original liquid with a volume larger than the micropores on the membrane surface are intercepted on the inlet side of the membrane, becoming the concentrate, thus achieving the purpose of purifying, separating, and concentrating the original liquid. There are about 6 billion 0.01 micron micropores on the wall of each meter long ultrafiltration membrane, which only allow water molecules, beneficial minerals, and trace elements in water to pass through. The volume of smaller bacteria is above 0.02 microns, so bacteria and much larger colloids, rust, suspended solids, sediment, and large organic matter can be intercepted by the ultrafiltration membrane, thus achieving the purification process.
The calculation formula is:
Within S=π dL × n
S outside=π DL × n
Among them, S represents the total inner surface area of the membrane fibers, and d represents the inner diameter of the ultrafiltration membrane fibers;
S represents the total surface area of the membrane fibers, and D represents the outer diameter of the ultrafiltration membrane fibers;
L is the length of the ultrafiltration membrane fibers;
N is the number of ultrafiltration membrane fibers.
Internal and external pressure hollow fiber ultrafiltration membranes
How much does ultrafiltration membrane costa?
You can directly dialFree inquiry hotline：400-9969-506
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