Author Archives: shengjie

1. Do not allow water with free chlorine to come in contact with the composite membrane element under any circumstances. If this contact occurs, it will cause the performance of the membrane element to deteriorate and its performance can no longer be restored. After the piping or equipment is sterilized, It should be ensured that […]

Reverse osmosis membrane and reverse osmosis equipment ① reverse osmosis membrane: 1) Structure: Is a semi-permeable membrane that allows only water molecules to pass through. The thickness of the membrane is generally 100 to 200 nanometers, and has an asymmetric cross-sectional structure. It mainly consists of three layers: a surface dense layer, a pore diameter […]

Equipment in use, in addition to the normal attenuation of performance, due to pollution caused by the attenuation of the performance of more serious equipment. The main pollution are mainly chemical scale, organic and colloidal pollution, microbial contamination. Different contaminants show different symptoms. Different membrane companies have proposed the symptoms of membrane fouling is also […]

With the water treatment equipment in the water treatment industry, a wide range of applications, reverse osmosis membranes are gradually being taken seriously. Reverse osmosis membrane cost is one of consumers most concerned about, good maintenance, help to extend the service life of reverse osmosis membranes. The new reverse osmosis membrane element is usually infiltrated […]

Recovery – refers to the percentage of feed water that is converted to water or permeate in a membrane system. According to the pre-treatment of water quality and water requirements. The recovery of the membrane system has been determined at design time Recovery = (produced water flow / feed water flow) × 100%

Water flux – refers to the reverse osmosis system of water production capacity, that is, per unit time through the film of water, usually tons / hour or gallons / day to represent. Salt penetration rate – in unit time, the unit area of the membrane through the salt, also known as salt penetration rate, […]

Desalination rate = (1 – water salinity / influent salinity) × 100% The desalination rate of the membrane element has been determined at the time of its manufacture. The desalination rate depends on the density of the ultra-thin desalting layer on the surface of the membrane element, and the desalting layer is denser and the […]

The composite film is mainly composed of the above two kinds of materials, it is a very thin dense layer and porous support layer composite. Porous support layer, also known as the base film, from the enhanced mechanical strength of the role; dense layer, also known as the epidermis, from the role of desalination, it […]

Polyamides include aliphatic polyamides and aromatic polyamides. 70 years of the 20th century, mainly the application of aliphatic polyamides, such as nylon-4, nylon-6 and nylon-66 film; currently the most used is aromatic polyamide film. The membrane materials are aromatic polyamides, aromatic polyamide-hydrazides and some nitrogen-containing aromatic polymers. Aromatic polyamide membrane to adapt to the pH […]

Cellulose acetate, also known as cellulose acetate or cellulose acetate. Often with cellulose containing cotton, wood and other raw materials, through esterification and hydrolysis reaction made of cellulose acetate, and then processed into reverse osmosis membrane.