Guangyuan Environmental Protection (Guangyuan Instrument Factory) Ozone Generators: Applications in Various Fields
Release date:
2024-01-30
PEM The electrolytic ozone generator uses pure water as its feedstock and employs a solid-state noble-metal polymer as the electrolyte, combined with a cation-exchange membrane. It produces ozone via low-voltage electrolysis without requiring any auxiliary materials or additives. The resulting ozone concentration can reach as high as 20% (by weight, equivalent to 250–280 mg/L). The byproduct of this ozone generation process is oxygen, with no secondary pollution whatsoever. In contrast, conventional high-voltage corona discharge ozone generators use air or oxygen as feedstock and require multiple pre-treatment steps. They rely on a high-frequency, high-voltage electric field of around 3,600 V to produce ozone; the maximum ozone concentration they can achieve is no more than 10%. Moreover, the byproducts of their ozone generation include nitrogen, oxygen, nitrogen oxides, and other impurities. Among these, nitrogen oxides are non-degradable, toxic, and carcinogenic substances.
The emergence of third-generation ozone technology—the PEM low-pressure electrolysis ozone generation technology—has greatly expanded the application fields of ozone. This technology overcomes the various drawbacks of the traditional high-voltage corona method. The core electrode of the generator is non-consumable, resulting in low operating costs and producing ozone concentrations more than six times higher than those generated by the conventional high-voltage corona method. In particular, the ozone produced contains no harmful substances such as nitrogen oxides and causes no secondary pollution whatsoever, making it a truly low-carbon, energy-saving, and environmentally friendly product. Consequently, its application scope is even broader, and it represents an inevitable trend in the development of ozone production technology.
Currently, the two main ozone-generation technologies in use are the corona discharge method and the electrolysis method.
High-voltage corona method (high-voltage discharge method): This method uses air as its raw material and maintains a certain discharge gap between two parallel high-voltage electrodes separated by a dielectric medium. When a high voltage is applied across the electrodes, the heat generated excites oxygen molecules in the air, enabling them to gain energy and collide with each other, thereby forming ozone. The corona method produces ozone using air as a gas source. Since air contains more than 78% nitrogen, under high-voltage conditions, nitrogen reacts with oxygen to form a new compound—nitrogen dioxide. Nitrogen dioxide is internationally recognized as a toxic substance and is one of the factors contributing to the development of cancer. Moreover, the technology used in the high-voltage corona method also limits the possibility of producing high-concentration ozone; typically, the weight-based concentration of ozone produced by this method ranges from 1% to 3%. Low-pressure electrolysis method (low-pressure hydrolysis method): This method uses water as its raw material and employs solid-state noble-metal polymers as the electrolyte. By performing low-voltage electrolysis on water (H2O), oxygen is separated to produce ozone. The resulting ozone has a weight-based concentration as high as 18% to 20%, and the accompanying gas is pure oxygen—with no harmful substances whatsoever.
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