At present, in terms of types of water disinfection, there are chlorine, sodium hypochlorite, bleaching powder, chlorine dioxide, trichloroisocyanuric acid, hydrogen peroxide, ozone and other agents and methods. In addition, there are iodine water, high-priced oxidized water, ultraviolet disinfection and other means. .
Among all disinfectants, although chlorine is the most economical, it has hidden dangers in transportation, storage, and use, and it is difficult to accurately control the dosage;
Compared with other disinfectants, sodium hypochlorite solution has great advantages. It is clear and transparent and soluble in water. It solves the technical difficulties of gas disinfectants such as chlorine, chlorine dioxide, and ozone that are difficult to dissolve in water and difficult to accurately add. It eliminates the problem of liquid chlorine, chlorine dioxide, ozone, etc. There are often hidden dangers such as leakage, leakage, poisoning, etc. during disinfection. Side reactants harmful to health and the environment are not produced during disinfection, and there are no many sediments caused by the use of bleaching powder. Because of these properties, sodium hypochlorite has been widely used in the disinfection and epidemic prevention of tap water, reclaimed water, industrial circulating water, swimming pool water, hospital sewage and other water bodies. However, since sodium hypochlorite solution is not easy to store for a long time and is inconvenient to transport, sodium hypochlorite is mostly prepared and used on-site in the form of electrolyzed brine.