Destination of the hydrogenated refined light gas and the gas from the stripping tower top reflux drum
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Where is the low-pressure gas from hydrogenation refining in sister units, as well as the gas from the reflux tank at the top of the stripping tower, sent for treatment?
It should be for dry gas desulfurization!
Hydrorefining is used to remove sulfur from the light gas fractions; the vapor from the top of the stripping tower is sent to a reflux tank for light hydrocarbon recovery, or for sulfur removal
The low-pressure gas is vented until it reaches a dry state; the stripping gas is used until absorption reaches stability. The specific location depends on whether the pressure in the stripping process meets the requirement for a stable feed pressure – if not, it goes to the inlet of the compressor.
After desulfurization, the dry gas is combined with the dry gas stream and fed into the fuel gas network.
The hydrotreated light gas, after desulfurization in the recycle hydrogen desulfurization tower, enters the recycle hydrogen compressor as recycle gas； The gas from the stripping tower top reflux drum enters the flare system.
We go for catalytic dry gas desulfurization, while some manufacturers go to the inlet of the coking rich gas compressor
Under normal conditions, our device carries out decoking and desulfurization, becoming part of the raw material for hydrogen production.
We use low-temperature dry gas desulfurization here! The gas from the stripping tower top reflux drum is sent to light hydrocarbon recovery!
Used as a hydrogen production feedstock after decoking and desulfurization