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AMMONIA SALTS REWORKING DESIGN Converting your ammonia-salt-waste into a value-added product. Stamicarbon B.V. Mercator 3 - 6135 KW Sittard, The Netherlands. P.O. Box 53 - 6160 AB Geleen, The Netherlands. Tel. +31 46 4237000 Fax. +31 46 4237001 [email protected] www.stamicarbon.com 15-11-16 10:20 STAMI_Ammonia_Salts_leaflet_WEB - NOV 2016 PAGE 1/3 AMMONIA SALTS REWORKING DESIGN The challenge Acidic scrubbing is needed to efficiently reduce ammonia to low levels. Sulfuric acid (H2SO4) and Nitric acid (HNO3) are the most commonly used acids for this purpose that leads to the formation of ammonium sulfate or ammonium nitrate salts. Our Solution Stamicarbon can offer its customers tailor-made schemes for reprocessing both ammonium sulfate (AS) as well as ammonium nitrate (AN) salts generated during acidic scrubbing processes. Based on the type of acid applied, the configuration of the scrubbing system, and how the salt leaves the plant, different options for reworking are possible. Ammonium sulfate can be reworked within the finishing section to a product containing traces of sulfur, or extra solid ammonium sulfate can be added (from an external source) to produce sulfurenriched urea. Ammonium nitrate can be reworked if it can be fed to a urea ammonium nitrate (UAN) or ammonium nitrate (AN) plant. With optimal integration between these plants, no waste streams need be generated. How it works Ammonium sulfate (AS) and ammonium nitrate (AN) generated in an acidic scrubber can be handled in such a way that there are no waste streams to dispose of. The different reworking possibilities are based on: • The type of acid used: sulfuric or nitric acid. • The type of scrubbing system used: dust scrubbing can be combined with the acidic scrubbing, in which case the end solution contains water, the ammonium salt, and urea or kept separate, in which case the solution from the acid scrubber contains only water and the ammonia salt. • The phase in which the salt leaves the plant: liquid or solid (combined with or separated from the main urea product). Benefits: • Environmentally friendly by offering a green solution • Efficient and effective • Waste is valorized Poss Recycling Ammonium Sulfate Why To convert ammonium sulfate salt waste-streams, generated by scrubbing, into a higher value sulfur- enriched urea fertilizer. How By concentrating the produced ammonium sulfate urea solution and shaping this concentrated melt into a sulfur containing urea product. In so doing producing liquid urea ammonium sulfate (UAS) to be recycled in order to have the salt leaving the plant in a solid form. Urea Melt PlantUrea Pl Urea Pl Nitric Acid Nitri Plant Pl Recycling Ammonium Nitrate Nitri Pl Why To reduce ammonia emissions from the finishing section by making use of existing nitric acid feedstock and integrating it with existing liquid UAN fertilizer production. Urea Urea Melt Pl PlantUrea How Through acidic scrubbing of the off-gases of the finishing and the UAN gases with nitric acid. The produced ammonium-nitrate solution is routed to the UAN section and accordingly used for the production of liquid UAN fertilizer. Pl Your benefits when working with Stamicarbon: • In all the solutions that we propose, the waste streams are completely reworked within the battery limits of your plant • Recycling your ammonia salts is tailor-made process, requiring in-depth know-how of the entire integrated process scheme, thereby benefiting on Stamicarbon’s long-lasting experience and solid reputation • Providing proven technology in grassroot and existing plants Contact Stamicarbon for finding the best solution to recycle your ammonia salts STAMI_Ammonia_Salts_leaflet_WEB.indd 6 STAMI_Ammonia_Salts_leaflet_WEB - NOV 2016 PAGE 2/3 Possible recycling routes and ammonium nitrate dic scrubber can be at there are no waste Recycle evaporation Recycle section Recycling Ammonium Sulfate evaporation Recycle section evaporation section Why To convert ammonium sulfate salt waste-streams, generated by scrubbing, into a higher value sulfur- enriched urea fertilizer. possibilities are ulfuric or nitric acid. system used: dust ined with the acidic se the end solution monium salt, and n which case the scrubber contains monia salt. e salt leaves the plant: ed with or separated oduct). ly by offering How By concentrating the produced ammonium sulfate urea solution and shaping this concentrated melt into a sulfur containing urea product. In so doing producing liquid urea ammonium sulfate (UAS) to be recycled in order to have the salt leaving the plant in a solid form. Recycling Ammonium Nitrate Why To reduce ammonia emissions from the finishing section by making use of existing nitric acid feedstock and integrating it with existing liquid UAN fertilizer production. How Through acidic scrubbing of the off-gases of the finishing and the UAN gases with nitric acid. The produced ammonium-nitrate solution is routed to the UAN section and accordingly used for the production of liquid UAN fertilizer. Urea Melt PlantUrea Melt Granulation Granulation Plant Nitric Acid Nitric Acid Plant Plant AN/UAN AN/UAN PlantPlant Plant Urea Melt Plant Nitric Acid Plant Scrubbing System Scrubbing System Scrubbing System Plant Granulation Plant AN/UAN Plant Scrubbing Scrubbing System System Scrubbing Urea Melt Urea Melt Plant Melt PlantUrea Plant Granulation Granulation Plant Granulation Plant Plant System Urea (melt or solid) streams Your benefits when working with Stamicarbon: • In all the solutions that we propose, the waste streams are completely reworked within the battery limits of your plant • Recycling your ammonia salts is tailor-made process, requiring in-depth know-how of the entire integrated process scheme, thereby benefiting on Stamicarbon’s long-lasting experience and solid reputation • Providing proven technology in grassroot and existing plants Contact Stamicarbon for finding the best solution to recycle your ammonia salts Urea (melt or solid) streams Urea (melt or solid) streams Condensate Condensate Condensate Acid streams Acid streams Acid streams Off gas / exhaust air streams Off/ exhaust gas / exhaust air streams Off gas air streams Salt solutions Salt solutions Salt solutions 15-11-16 10:20 STAMI_Ammonia_Salts_leaflet_WEB - NOV 2016 PAGE 3/3
