Items Chemical ClO2 generator Electrolysis ClO2 generator Principle Chemical reaction produce high purity of ClO2 Electrolyze Sodium chloride and water produce ClO2, Cl2 mixed disinfectant Reaction equation 5NaClO2+4HCl=4ClO2+ 5NaCl+2H2O NaCl+H2O=NaOH+ClO2+H2↑or 2NaClO2+2H2O=2NaOH+2ClO2+H2↑ Cost of investment Raw material Sodium chlorite, HCl (Hydrochloric acid) Sodium chloride, or sodium chlorite Generator components Chemicals storage tank, metering pumps Reactor Dosing device Electric control apparatus Electrolytic cell DC supply Sodium chlorite dissolving and storage tank Wearing parts Long life√ Short life for electrodes and often need maintenance and replacement. Electrode is easy to be damaged and maintenance cost is high. Advantages & disadvantages Raw materials Expensive Cheap and easy to get in the market.√ but contain more impurities which will cause large byproducts, low current efficient Structure Simple in structure√ Complexity in structure Convenience Easy in installation, operation and maintenance√ Complexity in installation, operation and maintenance Volume Occupy a smaller area. Occupy a larger area and easy to erode to operation room Security Safe and reliable√ Electrode discharge will cause electrolytic cell burst Consumption Low power consumption High power consumption, high salt consumption Capacity High almost the same as chlorine gas, and lower than chlorine dioxide Application Apply to small, medium, large-scale use of occasion Apply to small-scale use of occasion
