Seek help regarding explosion prevention in ozone generation rooms
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I need help. According to the latest standards for outdoor water supply design, GB50013-2018, is it still necessary to have explosion-proof measures in ozone generation rooms? The 2006 version of these standards is no longer in use, and the new standards do not require explosion-proof equipment in such rooms. Are there any other areas where explosion-proof measures are required?
This post was last edited by waggoner on 2020-7-6 at 14:32. Only an oxidizing agent: oxygen. I found a post from last year for reference: Does the ozone generator room qualify as a facility with explosion hazards?
Code for Design of Electrical Installations in Explosive Atmospheres GB 50058-2014 3.1.1 Electrical installation design in explosive gas environments is required when one of the following explosive gas mixture environments exists or may exist during production, processing, handling, transportation, or storage: 1 Under atmospheric conditions, combustible gases mix with air to form explosive gas mixtures； 2 Vapors or mists of flammable liquids with a flash point equal to or below the ambient temperature, when mixed with air, form explosive gas mixtures ； 3 When the operating temperature of the material is higher than the flash point of the flammable liquid, and there is a possibility of leakage of such liquid, its vapors or mist mix with air to form an explosive gas mixture.
Thank you! This is the basis for determining the design of electrical equipment in explosive gas environments. But what about only oxidizing gases, such as oxygen, including ozone? How should we consider a situation with an oxygen-rich environment?
Regarding the small bar, my understanding is that if there are no flammable gases, then it’s not necessary to draw explosion zones. Possible explosions could be things like physical explosions of the container, but this has nothing to do with electrical explosion protection.
90% oxygen purity – what do you think, ozone generator? Requirements for intake air purity
Explosions are only possible at ozone concentrations as high as 225–300 g/m3 (15–20%, w/w). Scientific literature has long discussed this, and it has also been recognized in recent Japanese standards. Therefore, at concentrations below 200 g/m3, there is no explosion risk when using ozone in generators and related equipment, nor is it necessary to design or manufacture them in accordance with explosion-proof standards.