When the ozone generator is used in water treatment projects and other occasions, there are many factors that may affect the efficiency and reliability of the generator, so the following issues must be paid attention to when designing the ozone generator application system:
⑴ The raw material gas of the generator must not contain hydrocarbons, corrosive gases and any other substances that can react in the oxygen/ozone/corona environment, thereby causing harm or damage to the safety of the equipment.
As we all know, the three elements of explosion are fuel, oxidizer and fire, and there are already two in the corona environment of ozone generator, namely oxidizer and fire. Therefore, it is necessary to prevent the inclusion of hydrocarbon fuel substances in the raw gas; if hydrocarbon substances are possible, a hydrocarbon analyzer must be installed to cut off the power when the hydrocarbon concentration is close to 25% of the lower explosive limit (LEl).
Fluorocarbons such as Teflon or coolant can decompose in the corona to form fluorine, which can corrode the glass dielectric material and accelerate the damage of the dielectric. The circulating cooling fluid surrounding the corona chamber may leak through the seal and enter the corona space. As a result, a lacquer or coating is formed on the surface of the dielectric body. When this happens, since this coating reduces the efficiency of ozone production, the dielectric must be cleaned regularly.
In addition, the raw material gas should also filter out particles of about 5μm to prevent small desiccant powder or other particles from entering the corona area of the generator. So as not to affect the corona efficiency.
⑵ The air supply pressure cannot be changed uncontrollably. Because the air pressure affects the corona power induction and the applied voltage across the dielectric, a wide range of pressure changes will make the generator operation unreliable. Exceeding the corona power range can cause the fuse or automatic breaker to be disconnected. Exceeding the applied voltage peak can also cause premature failure of the dielectric.
⑶ The ozone generator system must be designed to prevent a large amount of water from entering the generator.
The float valve used in the water-sealed air supply compressor or the condensate valve on the air dryer is blocked and jammed, which will cause the corona chamber of the generator to be filled with water. A large amount of water in the corona chamber can cause corona concentration, high current density and local dielectric heating, causing premature failure of the dielectric. Even if the detection device cuts off the corona power supply before the water enters the corona chamber, the impurities contained in the water will be deposited on the surface of the component, and these impurities must be removed before continuing to run. Operation failures or operating errors can force the treated water to flow from the ozone contact pool to the generator, which will at least cause the corona element to be polluted or the dielectric to be damaged. In addition, the system design and operating procedures must prevent flammable corrosive gases and water vapor returning from the ozone contact pool from entering the generator.
⑷ The quality of the cooling water should be good to prevent fouling, so as not to affect the heat dissipation effect of the generator.
The second pair of water-cooled generators said that in order to minimize the scaling of the heat transfer surface, the quality of the cooling water is very important. Fouling will reduce heat transfer efficiency, thereby reducing ozone production and increasing maintenance costs. Technically tap water is the preferred coolant. However, for the water consumption required by large industrial generators, using tap water is economically unattractive, except perhaps when the system is used in a water treatment plant. Contrary to the water quality of tap water, generally treated sewage is used as cooling water, and the effect is not very good, because it is easy to cause scaling. If high-quality water or other fluids are used in the sealed ten-pass cooling circuit, the last-stage heat exchanger is specially designed to minimize fouling; it is easy to clean, and the sewage effluent can also be used as the last-stage heat dissipation. For the best balance between water costs and equipment maintenance costs, cooling tower water or heat exchanger high-quality drinking water (no suspended solids, chloride <5mg/L) is mostly used in system design.
⑸ For air-cooled generators, the cooling air must be free of moisture, impurities, corrosiveness, aerosols, oily or conductive substances, and visible dust. Under normal circumstances, unless you are in an extremely dusty industrial atmosphere, most of the air does not need to be filtered.
