Removal of heavy hydrocarbons in LNG process
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What are the appropriate temperature and pressure for pre-cooling the cold box to remove heavy hydrocarbons? I hope someone knowledgeable can provide some guidance.
You haven’t even specified which method to use, so how can I answer you? The removal of heavy hydrocarbons can be done in the purification unit or after the material enters the cryogenic tank; there are dry and wet methods for the former, while there are many established processes for the latter
It is a mixed refrigerant cooling system; the cold box consists of a pre-cooling section and a deep cooling section. The feed gas is pipeline gas from CNPC, with a pre-cooling temperature of -65 degrees. Why does the temperature difference between the product exiting the cold box and the refrigerant side gradually increase? Is it because the pre-cooling temperature is not sufficient? Thank you for the advice!
Is the temperature difference increasing? That means it’s blocked, right?