Issues with charging nitrogen during diaphragm pump startup
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This post was last edited by sunjl1981 on 2013-1-6 at 22:16. When starting up a diaphragm cell, after the liquid level has been adjusted, before increasing the current, in some facilities it is necessary to fill the hydrogen system with nitrogen first and ensure that the oxygen content in the nitrogen is within acceptable limits before increasing the current; in other facilities, the current is increased without filling it with nitrogen. Let’s discuss whether it is indeed necessary to fill the diaphragm cell with nitrogen when starting it up. # hcbbs
Electrolytic replenishment is equivalent to a displacement process; in my opinion, nitrogen displacement is not necessary
Our plant has experienced explosions in the hydrogen system during startup in the past; subsequently, a nitrogen filling procedure was added during start-up and shutdown. When the plant is shut down, the hydrogen system contains air, and nitrogen should be used to fill it as a replacement during startup.
It is certainly necessary to fill the hydrogen pipeline with nitrogen after shutting down the diaphragm electrolyzer. Our company carries out nitrogen purging after each shutdown, checks the oxygen content in the nitrogen before restarting the equipment, and only then supplies power – this is a matter of ensuring safe operation
For safety reasons, the hydrogen system should be purged with nitrogen. We didn’t have it before either. But there was an accident. It’s not added yet either.