Matters needing attention in operation of ozone generator
Release time: July 29, 2019 09:45:05
Ozone generator There are many factors that affect the efficiency and reliability of ozone generator when it is used in water treatment engineering. Therefore, the following problems must be paid attention to when designing the application system of ozone generator: (1) the raw gas of the generator shall not contain hydrocarbons, corrosive gases and any other substances that can react in the oxygen / ozone / corona environment, thus causing damage or damage to the safety of the equipment. It is well known that the three elements of explosion are fuel, oxidant and flame, while there are two elements in corona environment of ozone generator, namely oxidant and flame. Therefore, it is necessary to prevent the feed gas from containing hydrocarbon fuel materials; if hydrocarbons may exist, a hydrocarbon analyzer must be installed to cut off the power supply when the hydrocarbon concentration is close to 25% of the lower explosion limit (LEL). Fluorocarbons, such as polytetrafluoroethylene or coolant, can decompose into fluorine in corona, which can corrode glass dielectric materials and accelerate dielectric damage. The circulating cooling fluid around the outside of the corona chamber may leak through the seal and enter the corona space, thus forming a coating and coating on the dielectric surface. When this happens, the dielectric must be cleaned regularly because the coating reduces the efficiency of ozone production. In addition, the feed gas should also be filtered out of about 5 micron particles to prevent small desiccant powder or other particles from entering the corona area of the generator. In order to avoid affecting corona efficiency. (2) Supply pressure cannot be changed uncontrollably. Due to the influence of pressure on corona power induction and voltage applied at both ends of the medium, the generator will be unreliable due to the large range of pressure variation. In the corona power range, fuse or automatic open circuit The device can be disconnected. The applied voltage will also cause premature failure. (3) The ozone generator system must be designed to prevent large amounts of water from entering the generator. The blockage and blockage of floating valve or condensate valve of air dryer of water seal compressor will lead to flushing of corona chamber of generator. A large amount of water in the corona chamber will lead to corona concentration, high current density and local dielectric heating, leading to premature dielectric failure. Even if the detector cuts off the corona power supply before the water enters the corona chamber, impurities in the water will deposit on the surface of the components, and these impurities must be removed before they can continue to work. Operation failure or wrong operation may force the treated wastewater to flow from the ozone contact cell to the generator, causing at least corona component pollution or dielectric damage. In addition, the system design and operating procedures must prevent flammable corrosive gases and steam returning from the ozone contact cell from entering the generator. (4) the quality of cooling water is good to prevent scaling, so as not to affect the cooling effect of the generator. In order to minimize the fouling on the heat transfer surface, the quality of cooling water is very important. Fouling will reduce heat transfer efficiency, thus reducing ozone production and increasing maintenance costs. Technically, tap water is preferred The alternative coolant, however, is economically unattractive for the water consumption required by large industrial generators, except perhaps in the case of generating systems used in water treatment plants. Contrary to the quality of tap water, the effect of treated sewage as cooling water is not very good, because it is easy to cause scaling. If high-quality water or other fluids are used in the sealed ten times cooling circuit, the final stage heat exchanger will It is specially designed to minimize scaling, and is easy to clean, and the effluent can also be used as the last stage heat dissipation. For the best balance between the heat exchanger and the cooling tower, no maintenance charge is required for the cooling water system. (5) For air cooled generators, the cooling air must be free of moisture, impurities, corrosivity, aerosols, oily or conductive materials, and visible dust. Under normal circumstances, unless in an extremely dusty industrial atmosphere, the air is mostly not filtered.
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