Issues regarding the nitrogen seal safety valve for ammonia water

2017-04-19View Original

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I have a question for everyone: after nitrogen purging of the 20% ammonia storage tank, a breather valve and a safety valve are installed. Can the exhaust from the safety valve be discharged directly into the atmosphere? The codes for fire protection in the petrochemical industry state that the gas discharged from the safety valves of ammonia systems should be treated before being released. But when nitrogen is added, it creates a mixture of nitrogen and ammonia – how should this mixture be treated? A water seal? Additionally, for such a breathing valve, it is possible to use only valves that function in one direction to create a vacuum effect, or else set an opening pressure higher than that of the safety valve as an additional layer of protection; surely a breathing valve cannot serve as a water seal

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Issues regarding the nitrogen seal safety valve for ammonia water

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