Seeking advice on the spontaneous combustion issue of ferrous sulfide
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During the shutdown for maintenance of the sulfur recovery unit, inadequate isolation of the fluid flow cell led to spontaneous combustion of ferrous sulfide near the observation port of the sulfur seal tank, resulting in smoke emission. The control room showed alarms from multiple hydrogen sulfide detectors – why? Is hydrogen sulfide produced during the combustion process, or can fixed hydrogen sulfide detectors on site detect sulfur dioxide? Please advise
When ferrous sulfide burns, SO2 is definitely released rather than H2S. However, H2S detectors are usually capable of detecting not only the concentration of H2S in the area but also that of SO2; therefore, what you’re referring to is definitely the latter case.
So for example, would 10 ppm of sulfur dioxide also be displayed as 10 ppm? Is the display accurate?
Reply to 3# kangjiannesta: You can consult the supplier for the specific details, but I think it should be the same.