Reverse osmosis scale inhibitor is a chemical agent used in reverse osmosis (RO) systems to prevent and reduce scale accumulation and blockage on the surface of RO membranes. The principle can be explained as follows:
Dispersion effect: The dispersant PAA in reverse osmosis scale inhibitors can interact with inorganic salts, organic matter, and particulate matter dissolved in water. Dispersants can disperse these substances evenly through the action of surfactants, avoiding their deposition on the RO film.
Stabilization effect: The stabilizer in reverse osmosis scale inhibitors can form complexes or coordination compounds with inorganic salts in water. These complexes can stably exist in water, preventing their deposition on the surface of the RO membrane. Stabilizing agents can also change the solubility of substances, making them more difficult to deposit and crystallize.
Decomposition effect: The decomposition agent in reverse osmosis scale inhibitors can decompose and dissolve some scale deposits in water. For example, acidic cleaning agents can dissolve common hard scale such as calcium magnesium sulfate.
Buffering effect: The buffering agent in reverse osmosis scale inhibitors can adjust the pH value of water and maintain it within a suitable range. Appropriate pH conditions can reduce fouling and corrosion on the membrane surface.
In summary, reverse osmosis scale inhibitors prevent and reduce the deposition and crystallization of inorganic salts, organic matter, and particulate matter on the surface of the RO membrane through dispersion, stabilization, decomposition, and buffering, thereby reducing membrane blockage and improving the efficiency and lifespan of the RO system.