Nowadays, the water treatment industry is increasingly using ozone (O3) instead of chlorine to stop treating pure water. There are four main application scenarios:
Production of drinking water
Disinfection of water used in food production and pharmaceutical production
Disinfection of swimming pool water
Disinfection before being put into circulation after sewage treatment
Chlorination treatment has been widely used in history to stop disinfecting water. However, in addition to high costs, this process also poses significant risks to human health and safety in water transportation and chlorination system applications. Due to the release of chlorine into water, it can cause serious environmental pollution, and chlorine can also produce harmful byproducts, namely carcinogenic carbon chloride. Given the above reasons, ozone disinfection has been consistently introduced into the water treatment industry in recent years. Ozone and chlorination have the same water treatment effect, both being powerful oxidizing agents that can attack impurities in water (especially microbial media) and split them into harmless residues before filtering them out of the water system. The advantage of ozone is that after it acts on microorganisms, it will undergo fission into completely harmless oxygen atoms.
Ozone generator
The working principle of an ozone generator is very complex. Pure air or oxygen is discharged at a high voltage between the two electrodes of the reaction unit (ceramic or stainless steel), typically 12000 volts. High voltage causes reactions between oxygen atoms, forming stable ozone molecules. The characteristic of ozone molecules is that they can generate and emit the scent of high-voltage electric sparks, like lightning. A typical ozone generator must use compressed air from a standard regenerative dryer, which is input into the ozone generator from a set of reaction containers similar to a heat exchanger. Depending on the type of generator used, nitrogen is decomposed from the gas before or after ozone oxidation.
Why is humidity measurement crucial?
There are three necessary reasons for measuring humidity in the air or oxygen of this process:
Prevent arcing at the electrode of the generator
Prevent corrosion of system components due to the formation of nitrogen acids
Increase ozone oxidation efficiency
If there is a lot of moisture in the gas entering the generator, it will cause an arc to occur on the electrode, and in extreme cases, an event of electrode contact penetrating the cavity wall may occur. Electric arcs will damage the electrodes and the casing of the system, ultimately leading to system paralysis and expensive repairs. When ozone is present, the reaction of the arc will cause nitrogen and water to become nitrogen acids and other nitrogen compounds, causing corrosion of electrodes and system components, and once again causing the ozone generator to malfunction. The efficiency of an ozone generator is directly proportional to the moisture content in the input gas. If the moisture content increases from 50ppm to 5ppm (-50-70 ° C dew point), the efficiency of the generator can increase by 20%. The general technical specification rule is that the minimum dew point of the input air or oxygen is -50 ° C. However, if accurate dry control reduces it to a dew point of -70 ° C, the task efficiency and lifespan of the generator can be significantly improved and enhanced.

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