Obtained a utility model patent with patent number ZL 2017 2 1572304.0.

Basic Principles

Due to the hydrophilicity of the membrane surface, it preferentially adsorbs water molecules while repelling salt molecules. Therefore, a pure water layer consisting of two water molecules is formed in the outer layer of the membrane. When pressure is applied, the molecules in the pure water layer continuously flow through the reverse osmosis membrane through capillaries. Controlling the pore size of the epidermal layer is very important, as it affects the desalination effect and permeability. Generally, when it is twice the thickness of the pure water layer, it is called the critical pore size of the membrane, which can achieve ideal desalination and permeability effects.

Technical advantage

(1) High filtering level; Adopting a roll type reverse osmosis membrane, the membrane separation particle size is generally less than 1nm;

(2) High interception rate; Intercept most organic pollutants, monovalent salts, divalent salts, etc;

(3) High organic matter retention rate; The reverse osmosis membrane has a retention rate of over 99% for organic pollutants;

(4) High yield; The yield of treating nanofiltration clear solution is as high as 80%; After the hardness of the influent decreases, the yield can be further increased to 82% -90%;

(5) The operating pressure is relatively low, with an average working pressure of 20-50 bar;

(6) Modular integrated device with high degree of automation.

Applicable fields

Suitable for solid-liquid separation of wastewater, intercepting impurities with molecular weights ranging from 200 to 500 daltons.