What are the current refining processes and how do they compare?
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What are the current refining processes and how do they compare? If it is new, what process is better? Our factory uses copper washing. Is there any good modification plan?
The refining process includes (1) liquid nitrogen washing； (2) Methanation ； (3) Copper washing, etc. Method (1) has high investment and requires an air separation device, but the purification degree is very good. Method (2) has low investment, but depends on the content of CO and CO2 in the process gas, which is generally less than 0.7% and is not suitable if the content is high. ； Method (3) has high energy consumption and heavy pollution, and has been eliminated abroad. If the newly installed unit has an air separation unit, it is best to choose liquid nitrogen washing; if not, choose methanation. Of course, if the CO and CO2 content of the process gas is too high, you can choose a double-methane process such as a non-isobaric alcohol alkylation process. For system transformation, the double-methane process is optimized and selected, such as Guochang Company's non-isobaric alcohol alkylation technology, Annol's alcohol alkylation technology, etc.
Which ones are you talking about? Methanol is now mainly produced in three towers!