The ozone generator generates ozone in the gap between the inner and outer electrodes, and the ozone can be collected and output at a higher concentration, such as for water treatment. The electrode of the open generator is exposed in the air, and the generated ozone is directly diffused into the air. Because of the low ozone concentration, it is generally only used for air sterilization in a small space or surface sterilization of some small items. The gap discharge generator can be used instead of the open generator. However, the cost of the gap discharge type ozone generator is much higher than that of the open type.
According to the gas materials used, there are two types: oxygen type and air type. The oxygen type is usually supplied with oxygen from an oxygen cylinder or an oxygen generator. Air type usually uses clean and dry compressed air as raw material. Because ozone is generated by oxygen, and the oxygen content in the air is only 21%, the concentration of ozone generated by air-type generators is relatively low, and the oxygen purity of bottled or oxygen generators is above 90%, so oxygen-type The ozone concentration of the generator is relatively high.
Previously, the bleaching and dyeing wastewater treatment process was biochemical treatment + coagulation deposition+ sewage treatment facilities for decolorizing agents to treat many grey fabric pretreatment and dyeing wastewater produced and discharged from the bleaching and dyeing workshop. The above technical route was jointly issued by the State Environmental Protection Administration of my country and the National Development and Reform Commission in 2001 to guide the wastewater treatment of my country's printing and dyeing industry. However, the wastewater has high COD value, large chroma, and organic matter that is difficult to degrade and some dyes are difficult to remove. , Often can not meet the emission specifications COD≤100mg/L, chromaticity≤40 (times) requirements.
The working principle of the ozone generator is distinguished by the way of ozone generation. The current ozone generator mainly has three types: high-voltage discharge type, ultraviolet irradiation type, and electrolysis type.
High-voltage discharge generator This type of ozone generator uses a high-voltage current of a certain frequency to produce a high-voltage corona electric field, which makes the oxygen molecules in or around the electric field electrochemically react to produce ozone. This kind of ozone generator has the advantages of mature skills, stable work, long service life, and large ozone output (single machine can reach 1Kg/h), so it is widely used in related occupations at home and abroad. The high-voltage discharge ozone generator is divided into the following types:
According to the generator's high-voltage electric frequency, there are three types: power frequency (50-60Hz), intermediate frequency (400-1000Hz) and high frequency (GG amp;gt;1000Hz). Power frequency generators have basically withdrawn from the market due to their large size and high-end power consumption. The medium and high frequency generators have the advantages of small size, low power consumption, and large ozone output, and are very commonly used products now.