What are the methanol cycles in the low-temperature methanol washing unit?
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For example, what are the processes like for pre-washing, main washing, and the methanol circulation in the H2S concentration circuit?
There is also refined methanol. H2S absorbs methanol. These are the main ones.
Reply to 2# aigo: What about the cooling methanol circulation loop?
There is no dedicated cooling circuit for methanol; the low temperature required for methanol is mainly obtained through the cooling capacity provided by the flashing process, as well as heat exchange with external cooling sources (such as ammonia-based refrigeration)