How does a reverse osmosis membrane work?
Do you know what RO reverse osmosis membrane is? Some people may have heard of it, but they don't know what it is. Let me tell you. It is not a mysterious thing. It is mainly used in reverse osmosis equipment/reverse osmosis water treatment equipment. In fact, RO reverse osmosis membrane is the main material of reverse osmosis. Its production material is made of polymer material. Its surface is transparent or translucent, and its surface pore micro-diameter size is 0.5 ~ 10nm. between. RO reverse osmosis membrane has a wide range of applications and can be used in petrochemical, steel, electronics, medicine, food and beverage, etc. There are many types of raw water for RO reverse osmosis membranes, and their functions are different. So how does RO reverse osmosis membrane work? Today, Guangdong Volardda Water Purification Equipment Co., Ltd. will introduce to you the working principle of RO reverse osmosis membrane.
Introduction of reverse osmosis membrane
The principle of reverse osmosis film reverse osmosis technology is that under the action of higher than the osmotic pressure of the solution, these substances and water are separated according to the fact that other substances cannot pass through the semi-permeable membrane. The pore size of the reverse osmosis membrane is very small, so it can effectively remove dissolved salts, colloids, microorganisms, organic matter, etc. in water. The system has the advantages of good water quality, low energy consumption, no pollution, simple process and easy operation. The reverse osmosis membrane is the core element to realize reverse osmosis, and it is an artificial semipermeable membrane with certain characteristics made by simulating biological semipermeable membrane. Generally made of polymer materials. Such as cellulose acetate film, aromatic polyhydrazide film, aromatic polyamide film. The diameter of the surface pores is generally between 0.5 and 10 nm, and the permeability is related to the chemical structure of the membrane itself. Some polymer materials have good repellency to salt, but the permeation speed of water is not good. The chemical structure of some polymer materials has more hydrophilic groups, so the permeation speed of water is relatively fast. Therefore, a satisfactory reverse osmosis membrane should have an appropriate amount of permeation or salt rejection. At the same time, it can also protect reverse osmosis equipment and reverse osmosis water treatment equipment and prolong their life.
How RO reverse osmosis membrane works
A membrane that is selective for permeable substances is called a semipermeable membrane, and a membrane that can only permeate a solvent but cannot permeate a solute is generally called an ideal semipermeable membrane. When the same volume of dilute solution (such as fresh water) and concentrated solution (such as salt water) are placed on both sides of the semipermeable membrane, the solvent in the dilute solution will naturally pass through the semipermeable membrane and flow to the concentrated solution side spontaneously, This phenomenon is called penetration. When the osmosis reaches equilibrium, the liquid level on the concentrated solution side will be higher than that of the dilute solution by a certain height, that is, a pressure difference is formed, and this pressure difference is the osmotic pressure. The size of the osmotic pressure depends on the inherent properties of the solution, that is, it is related to the type, concentration and temperature of the concentrated solution and has nothing to do with the properties of the semipermeable membrane. If a pressure greater than the osmotic pressure is applied to the concentrated solution side, the flow direction of the solvent will be opposite to the original permeation direction, and it will begin to flow from the concentrated solution to the dilute solution side. This process is called reverse osmosis. Reverse osmosis is a reverse migration movement of osmosis. It is a separation method that separates solutes and solvents in solution by means of selective interception of semipermeable membranes under pressure driving. It has been widely used in various liquids. Purification and concentration, among which the most common application example is in the water treatment process, the use of reverse osmosis equipment and reverse osmosis water treatment technology to remove impurities such as inorganic ions, bacteria, viruses, organics and colloids in raw water, so as to obtain high-quality products. quality pure water.
The working principle of RO reverse osmosis membrane introduced to you today is so much. I believe that everyone has a certain understanding of the working principle of RO reverse osmosis membrane. In fact, there are many materials for RO reverse osmosis membrane, such as cellulose acetate, polymer Amides, composite membranes, etc., these materials are essential. RO reverse osmosis membrane has appeared for a long time, and now it is a kind of continuation and development. The maintenance of RO reverse osmosis membrane is also very important. If RO reverse osmosis membrane is maintained better, its service life will be longer. The above is the relevant information released by Guangdong Volardda Water Purification Equipment Co., Ltd. Welcome new and old customers to come to consult. 
