Reverse osmosis scale inhibitor is a chemical substance used in the field of water treatment to prevent the formation of scale on the surface of reverse osmosis membranes and maintain their efficient operation. Its function and principle are as follows:
1. Prevent scaling: Reverse osmosis scale inhibitors can prevent the crystallization and deposition of inorganic salts and organic substances in water on the surface of the reverse osmosis membrane, thereby preventing the formation of scaling. These inorganic salts and organic substances include calcium, magnesium, silicates, iron, aluminum, organic compounds, etc.
2. Dispersion and separation: Reverse osmosis scale inhibitors can disperse and separate the formed scale, preventing it from further deposition on the reverse osmosis membrane. By dispersing and separating, the impact of scaling on the flux and desalination rate of the reverse osmosis membrane can be reduced.
3. Cleaning protection: Reverse osmosis scale inhibitors can also clean and protect the surface of reverse osmosis membranes, preventing the attachment and accumulation of pollutants and organic substances. It can remove dirt on the surface of the membrane, maintain its clean state, and ensure efficient operation of the membrane.
The principle of reverse osmosis scale inhibitors includes the following aspects:
1. Coordination effect: The active components in reverse osmosis scale inhibitors have affinity and can form coordination compounds with inorganic salts and organic substances in water, thereby preventing their crystallization and deposition.
2. Dispersion effect: Surfactants in reverse osmosis scale inhibitors can change the surface properties of particles in water, making them hydrophilic or hydrophobic, thereby dispersing particles and preventing their deposition.
3. Ion Exchange interaction: The ion exchange resin in the reverse osmosis scale inhibitor can exchange with cations or anions in the water, so as to reduce the concentration of inorganic salts in the water and prevent their crystallization and deposition.
In a word, RO scale inhibitor can prevent the formation of inorganic salts and organic substances in water from scaling on the surface of RO membrane and protect the cleaning and efficient operation of the membrane through coordination, dispersion, ion Exchange interaction and other mechanisms.