Hydrogen sulfide content issue in hydrorefining units
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The pipes and equipment in our unit’s hydrogenation refining facility are made of 0Cr18Ni9Ti material. Due to the lack of design documents from that time, it is not possible to determine the intended range for hydrogen sulfide levels in the system at that period. From a process perspective, levels between 500 and 10,000 ppm should be acceptable; however, from an equipment perspective, 10,000 ppm seems too high. The current control range is 500 to 2,000 ppm. I think this range is too narrow and difficult to control. I would like to ask the experts in process and equipment fields for their advice; I hope they can provide guidance regarding hydrogenation processes and equipment Thank you all
Generally, 300-800 is sufficient; indirect sulfur injection is easy to control
At present, the sulfur content is too high, and the water injection level in the system is still around 4000
It is appropriate to keep the hydrogen sulfide content in the circulating hydrogen within the range of 500–2000 PPM; the equipment should be able to withstand corrosion at this level, and the thickness of key parts of the piping system can also be measured periodically.
Is reaching 4000 ppm a significant impact on the equipment? Is it within the sequential range?
Keep the catalyst level as low as possible, catalyst one. 300~500 ppm is allowed.