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I. High-Voltage Discharge Generator This type of ozone generator is a high-voltage corona electric field that uses a high-frequency current of a certain frequency to electrochemically react oxygen molecules in or around an electric field to produce ozone.
This kind of ozone generator has the advantages of mature technology, stable operation, long service life and large ozone output (up to 1Kg/h in a single machine). Therefore, it is widely used in related industries at home and abroad.
In the high-pressure discharge type ozone generator, it is divided into the following types:
1. According to the high-voltage frequency of the generator, there are three kinds of power frequency (50-60Hz), intermediate frequency (400-1000Hz) and high frequency (>1000Hz). Due to its large size and high power consumption, the power frequency generator has basically withdrawn from the market. The medium and high frequency generators have the advantages of small size, low power consumption, large ozone output, etc., and are commonly used products.
2. According to the gas raw materials used, there are two types of oxygen type and air type. The oxygen type is usually supplied by an oxygen cylinder or an oxygen generator. The air type usually uses clean and dry compressed air as a raw material. Since ozone is produced by oxygen, and the oxygen content in the air is only 21%, the concentration of ozone produced by the air generator is relatively low, and the oxygen purity of the bottle or oxygen generator is above 90%, so the oxygen type The generator has a higher ozone concentration.
3, according to the cooling method, there are water-cooled and air-cooled. When the ozone generator works, it will generate a lot of heat energy, and it needs to be cooled. Otherwise, the ozone will decompose due to high temperature. The water-cooled generator has good cooling effect, stable operation, no attenuation of ozone, and can work continuously for a long time, but the structure is complicated and the cost is slightly higher. The air-cooled cooling effect is not ideal and the ozone attenuation is obvious. High performance ozone generators with consistent overall performance are typically water cooled. Air-cooling is generally only used for low- and medium-range ozone generators with low ozone production. When selecting the generator, water-cooled type should be used as much as possible.
4. According to the dielectric material, there are several types of quartz tubes (one kind of glass), ceramic plates, ceramic tubes, glass tubes and enamel tubes. Ozone generators currently manufactured using various types of dielectric materials are available on the market, and their performances are different. The low cost of glass dielectrics is one of the early materials for artificially producing ozone, but the mechanical strength is poor. Ceramics and glass are similar but ceramics are not suitable for processing, especially in large ozone machines. Enamel is a new type of dielectric material. The medium and the electrode have high mechanical strength and high precision precision. They are widely used in large and medium-sized ozone generators, but the manufacturing cost is high. 5, according to the structure of the ozone generator, there are gap discharge type (DBD) and open type. The structure of the gap discharge type is that ozone generates ozone in the gap between the inner and outer electrode sections, and the ozone can be collected and used in a concentrated manner, such as for water treatment. The electrodes of the open generator are exposed to the air, and the generated ozone diffuses directly into the air. Because of the low ozone concentration, it is usually used for air sterilization in a small space or surface disinfection of some small items. A gap discharge generator can be used instead of an open generator. However, the gap discharge type ozone generator costs much higher than the open type.
2. Ultraviolet ozone generator This type of ozone generator irradiates oxygen molecules with ultraviolet rays of a specific wavelength (185 mm) to decompose oxygen molecules to generate ozone. Due to the large volume of the UV lamp, low ozone production and short service life, the generator is used in a narrow range and is commonly used on disinfection cupboards.
Third, the electrolytic generator This type of ozone generator usually produces ozone by electrolyzing pure water. The generator can produce high concentration of ozone water, has low manufacturing cost, and is simple to use and maintain. However, due to the shortcomings of ozone production, the short electrode life, and the difficulty in collecting ozone, the scope of use is limited. At present, such generators are only used on some specific small devices or in certain specific places, and there is no condition to replace the high-voltage discharge generator.
A brief analysis of the working principle of ozone generator
Divided according to the way of ozone generation, there are three main types of ozone generators: high pressure discharge type, ultraviolet radiation type, and electrolytic type.