Tail gas components of melamine and purification issues
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The main components of triamine exhaust gases are ammonia and carbon dioxide; what other substances are present in these exhaust gases? How can it be removed? Could there be urea, isocyanic acid, melamine, or things like that?
Reply to 2# menglin2157: How should it be handled if it’s a one-step process? What are the main components of exhaust gas? Can it be listed?
The two-step treatment method generally involves washing in a tower to produce ammonium carbamate for export, or to produce carbonamide as a by-product. I would like to know how, after two-step exhaust gas treatment, the ammonium carbamate solution can be further processed for the co-production of urea; a 100,000-ton capacity urea production plant using a full-circulation aqueous solution system can be used to produce urea separately.
Reply to 5# menglin2157: Expert, may I ask how insoluble substances are filtered out from exhaust gases? What are the insoluble substances? Thank you
Reply to 7# menglin2157: What other filters are there besides the ceramic filter? I heard that catalysts are used; I don’t know what kind. Do experts have any information on this?
Reply to 9# menglin2157: Regarding the purification of triamine exhaust gases, I was wrong; it seems that a catalyst is not used for this purpose. It requires steam, electricity, and natural gas, with low investment costs. I don’t know what process to use. Remove impurities from the exhaust gases. Is there any information on this?