When ozone generators are applied in water treatment projects and other places, there are many factors that can affect the efficiency and reliability of the generators. Therefore, when designing the application system of ozone generators, the following issues must be noted:
⑴ The raw material gas of the generator should not contain hydrocarbons, corrosive gases, or any other substances that can react in an oxygen/ozone/corona environment, thereby causing harm or damage to equipment safety.
As is well known, the three elements of an explosion are fuel, oxidizer, and spark, and two of them already exist in the corona environment of an ozone generator, namely oxidizer and spark. Therefore, it is necessary to avoid the presence of hydrocarbon fuel substances in the raw material gas; If there are hydrocarbon substances present, a hydrocarbon analyzer must be installed to cut off the power when the hydrocarbon concentration approaches 25% of the lower explosive limit (LEl).
Fluorocarbons, such as Teflon or coolant, can decompose into fluorine during corona discharge, which can corrode glass dielectric materials and slow down dielectric damage. The circulating cooling fluid surrounding the corona chamber can leak through the seal and enter the corona space, resulting in the formation of a layer of paint or coating on the surface of the dielectric material. When this situation occurs, the dielectric must be cleaned regularly due to the reduced efficiency of ozone production caused by this coating.
In addition, the raw gas should also be filtered out of particles around 5 μ m to prevent small dry agent powders or other particles from entering the corona zone of the generator. To avoid affecting the corona efficiency.
⑵ The gas supply pressure cannot be changed uncontrollably. Due to the influence of air pressure on the induction of corona power and the voltage applied across the dielectric, large-scale pressure changes can cause the generator to operate unstably. Exceeding the corona power range can cause the fuse or automatic circuit breaker to disconnect. Exceeding the peak value of the applied voltage can also cause premature failure of the dielectric material.
When designing an ozone generator system, it must be possible to prevent a small amount of water from entering the generator.
The float valve used for water sealed gas supply compressors or the condensate valve on air dryers that is blocked or stuck can cause water to flood the corona chamber of the generator. A small amount of water entering the corona chamber can cause corona concentration, high current density, and partial heating of the dielectric, resulting in premature failure of the dielectric. Even if the detection device cuts off the corona power supply before the water enters the corona chamber, impurities contained in the water will still deposit on the surface of the component, and these impurities must be removed before continuous operation. Operational failures or errors can force the effluent from the ozone contact tank to flow into the generator, at least causing contamination of corona components or damage to the dielectric material. 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 avoid scaling, so as not to affect the heat dissipation effect of the generator.
The water quality of the cooling water is crucial for minimizing scaling on the heat transfer surface of two pairs of water-cooled generators. Scaling can reduce heat transfer efficiency, thereby increasing ozone production and 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 for the situation where the generator system is used in water treatment plants. Contrary to the quality of tap water, generally treated wastewater used as cooling water is not very effective because it is prone to scaling. If high-quality water or other fluids are used in a sealed ten stage cooling circuit, and the final stage heat exchanger is specifically designed to minimize scaling; And it is easy to clean, and the sewage effluent can also be used as the final stage heat dissipation. In order to achieve the best balance between water and equipment maintenance costs, cooling tower water or high-quality drinking water from heat exchangers (free of suspended solids and 5mg/L chloride) is rarely used in system design.
For air-cooled generators, the cooling air must be free of moisture, impurities, corrosiveness, aerosols, oil or conductive substances, and visible dust.
Under normal circumstances, unless in an extremely dusty industrial atmosphere, the air generally does not require filtration and disposal.

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