Why are there acid-base differences in reverse osmosis scale inhibitors? When some friends first came into contact with reverse osmosis scale inhibitors, they didn't quite understand why there were acid and alkali. Because both acidic reverse osmosis scale inhibitor and alkaline reverse osmosis scale inhibitor have the same function. They are dissolved in water and adsorbed on the microcrystals of inorganic salts to increase the repulsion between particles, hinder their aggregation and make them in a good dispersion state, so as to prevent or reduce the formation of scale. So why is there such a distinction? Xiaobian was a little confused when he first came into contact with this water treatment agent. Let's give you a brief introduction.
Before introducing this acid-base reverse osmosis scale inhibitor, we first need to understand the necessary knowledge of reverse osmosis scale inhibitor. The reverse osmosis device adopts reverse osmosis scale inhibitor to protect the reverse osmosis membrane and prolong the service life of the reverse osmosis membrane. However, due to the different raw materials used before the production of reverse osmosis scale inhibitor, in recent years, the reverse osmosis scale inhibitor on the market is generally divided into acid reverse osmosis scale inhibitor and alkaline scale inhibitor according to pH value.
At present, the reverse osmosis scale inhibitors in domestic and foreign markets are mainly acidic, among which alkaline scale inhibitors are generally one product. The difference between the two lies in the different types of raw water applied. Acid is generally used for groundwater, tap water, well water, etc; Alkaline is generally used for surface water, seawater desalination, river water, lake water, etc.
However, the raw water used by many customers has the tendency of calcium carbonate scaling, so the pH value of the inlet water of the reverse osmosis equipment should be adjusted to be acidic to control the water of bicarbonate ions to resolve and cause calcium carbonate precipitation. Therefore, many reverse osmosis equipment systems often need to add acid to adjust the scaling of the control system, which is also the reason why the acidic reverse osmosis scale inhibitor is widely used. If alkaline scale inhibitor is used at this time, it will be conducive to the reaction generation of calcium carbonate and make the scaling of the equipment more serious.
In addition, if the microbial content in surface water is small, it is not necessary to use alkaline scale inhibitor; Alkaline scale inhibitor is recommended when the microbial content is high, because alkaline scale inhibitor has bactericidal and bacteriostatic effect. In addition, dirt is also divided into acidic and alkaline, among which alkaline dirt is more. The use of acidic scale inhibitor can not only remove dirt by using the principle of neutralization reaction, but also adjust pH value. On the contrary, alkaline scale inhibitor can remove acidic dirt.
Of course, the above can not fully explain the acid-base division of reverse osmosis scale inhibitor. The fundamental reason is that the corresponding acid-base materials in the device must require the corresponding acid-base degree to produce chemical reaction.
