Why is NOx used in the on-site alarm devices of the WSA process?
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In the WSA sulfuric acid production process, how are the on-site alarms used for nitrogen oxides? Why aren’t there alarms set up for hydrogen sulfide and sulfur dioxide?
Didn’t understand what you meant? Are you saying that the on-site alarm device only monitors nitrogen oxides and not hydrogen sulfide? Typically, only hydrogen sulfide alarms are installed at the WSA site.
Just use hydrogen sulfide and combustible gas alarms
Yes, that’s right; I still don’t understand it. We only have nitrogen oxide alarms on site
What is the purpose of installing nitrogen oxide alarms? A hydrogen sulfide alarm should be installed.