Large Volume Inorganic Chemicals - Ammonia ... - ammk-rks.net

Chapter 22.4.22 Ammonia removal from purge and flash gases in a closed loopDescriptionAmmonia is removed from purge and flash gases by water scrubbing. Compression of lowpressure flash gases is achieved by a mechanical compressor or by an ejector, and is carried outin order to feed them to a water scrubbing system. The scrubbed gases are burnt in thereforming section. The obtained NH 3 solution is recycled to other processes or distilled torecover pure NH 3 .Achieved environmental benefitsReduced NO x emissions, reduced NH 3 emissions.Cross-media effectsAdditional energy consumption.Operational dataNo information provided.ApplicabilityThis integrated technique is primarily applicable in new and existing conventional steamreforming plants. It is unlikely to be applicable for very small flash gas streams, when the crossmediaeffect (energy consumption) outweighs the environmental benefit (reduced NO xemissions).EconomicsNo information provided.Driving force for implementationReduced NO x emissions, reduced NH 3 emissions.References to literature and example plants[1, EFMA, 2000, 3, European Commission, 1997]86 Large Volume Inorganic Chemicals – Ammonia, Acids and Fertilisers