I have a question about purification and recycling; please help!
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I would like to ask the experts here: what are the main functions of the cold drum, desulfurization, ammonia washing, and salt recovery units in the purification and recycling process? It would be great if you could provide a detailed explanation. Thank you!
1. Cold drum: Initial cooling and transportation of gas. 2. Desulfurization: Removal of hydrogen sulfide from the gas to achieve purification. At the same time, the desulfurization liquid is regenerated through a regeneration unit for reuse. 3. Ammonia washing: This process is used to remove ammonia from gas, but due to environmental regulations, it is increasingly less utilized. 4. Salt extraction: By-products in the desulfurization process are generated, and to ensure the proper operation of the system, it is necessary to extract these salts.