Discussion on the requirements for nitrogen content in the purified gas resulting from liquid nitrogen washing
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As the title suggests, what is the impact of different nitrogen contents in the purified gas at the outlet of the low-temperature methanol washing unit on the liquid nitrogen washing unit? For example, the content can reach up to 40%
It depends on the nitrogen content in your design for purifying gas with liquid nitrogen; if it’s too high, CO cannot be removed through liquid nitrogen purification
It is relatively high, accounting for about 20% of the total content in the purified gas.
A high nitrogen content can affect the heat balance of the cold box, resulting in an upward shift in the amount of cooling capacity； Furthermore, due to the issue of cold capacity, it leads to a higher consumption of washing nitrogen, and there is a tendency for CO levels to exceed the specified limits