Issues with the discharge location of safety valves or relief systems for hydrogen or hydrogen-rich gases
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Issues related to the discharge location of safety valves or relief systems for hydrogen or hydrogen-rich gases. Conditions: 1. The entire facility does not have a flare system. 2. There are few hydrogen discharge points in the entire facility, fewer than five. 3. The volume of the containers is between 5–10 m³. Questions: 1. How should the emission system be designed to ensure the safe release of this hydrogen in the event of an accident? 2. Is it reasonable to use a water seal tank along with a flame arrester to direct the emissions to a high point in the atmosphere?
We have two approaches to handle this: 1. Normal operation, by entering the residual liquid system for washing; 2. In case of abnormal conditions, venting at a high point with a flame arrester
May I ask the original poster, has this problem been solved? I’m facing the same issue now; since there is no flare system in the plant, how should the hydrogen safety valves and emergency relief systems be handled? Seeking your advice
May I ask how the original poster handled it in the end?
We have encountered this situation as well; we are not sure whether to use direct high-point venting with a flame arrester or to add an additional water seal.
We have chosen to use high-point venting with a flame arrester. There is a continuous light flow of nitrogen purging in the vent line
Are there any specific requirements for the location of this nitrogen purge point? Thank you to the original poster for sharing this information.
What is the pressure of this nitrogen?
A flame arrester shall be installed on the exhaust pipe, and it should be placed at the pipe outlet. The outlet should be installed vertically. The outlet of the exhaust pipe should be more than 2 meters above the roof. The exhaust pipe must be grounded and located within the range of lightning protection. The exhaust pipe should have measures to prevent air backflow. For specific requirements, please refer to GB4692-2008 Safety Technical Regulations for the Use of Hydrogen