Ultrafiltration is a kind of asymmetric half through the film, commonly used materials are cellulose acetate membrane (CA), polysulfone (PS), polypropylene film (Pan). Under a certain pressure, the water flow on the membrane surface, water and dissolved salts and other electrolytes such as small particles can permeate ultrafiltration membrane, while the protein, enzyme, bacteria, viruses, latex, a large amount of heat and other molecular particles and colloidal substances by ultrafiltration membrane barrier, so that part of the water particles are separated and concentration. Ultrafiltration membrane aperture 0.1-0.002 & micro; m, between reverse osmosis and microporous membrane.

Ultrafiltration device is based on the requirements of the production, using the corresponding molecular weight cut-off ultrafiltration membrane for process design. Ultrafiltration separation at room temperature, low pressure operation without phase change, the film is not easy to block, the operation is very convenient.

Super microporous membrane size between the 0.002-0.1 m, ultrafiltration membrane separation process is a membrane with pore size of sieve separation process, as the driving force to film on both sides of the pressure difference, by ultrafiltration membrane as the filter medium, namely under certain pressure, when the mixed solution flowing through the membrane, the surface of the large and small molecule solutes containing, solvent and solute molecules, such as inorganic salts will through the membrane. Solute molecules is due to volume is larger than the membrane pore size membrane interception, is recovered as concentrated liquid. Thus to achieve to the original fluid purification, separation and concentration of objective.

Liquid generally refers to the need to purify, separation or concentration of the solution, through the liquid to solution through the ultrafiltration membrane is the portion of the liquid filtering solute molecules, concentrated solution is the solution for separation out through the liquid and the remaining high concentration solution. In water purification project, dope is refers to the raw water inlet, through liquid namely for the purification of water, concentrated liquid is discharged waste water.

Ultra filtration membrane pore size

In the technology of membrane separation membrane pore size between the 0.002-0.1 m filtering membrane called for ultrafiltration membrane, and colloid volume were equal to or greater than 0.1um, latex is greater than or equal to 0.5um, Escherichia coli, Staphylococcus aureus, bacterial volume is more than or equal to 0.2um, suspended solids, particle volume is more than or equal to 5um, so that ultrafiltration can filter out bacteria solution, colloid, suspended solids, protein and other macromolecular substances.

The ultrafiltration device adopts the vertical cross flow filtration method, which can be used for cleaning or flushing:

High precision: to completely filter the bacteria in water, rust, colloid, organic matter and other substances, retention

The main indicators of trace elements beneficial to human health, such as microbial and turbidity of purified water, are superior to the sanitary standard of bottled drinking water.

] long life: because ultrafiltration machine with vertical cross filtration principle, automatic cleaning, blocking is not easy to dirty, so in normal use filter life for ordinary water purifier of 30 - 50 times.

It can meet the high flux: direct drinking, bathing, beauty, food, sanitation and other needs.

] low cost: due to high flux of the ultrafiltration machine, long service life, maintenance free, so tonne purification water treatment costs only one yuan or so, far less than other purifying devices