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

Chapter7Achieved environmental benefitsWith the combined treatment, a considerable amount of waste water from the scrubbing ofexhaust gases from neutralisation/evaporation and the spherodisers is avoided and the ANsolution can be recycled to the process.Table 7.12 shows the achieved emission levels for the combined treatment ofneutralisation/evaporation and spherodiser exhaust vapours/gases.Raw gas Emission level Efficiency Referencemg/Nm 3 Nm 3 /hour mg/Nm 3 kg/hour %Dust 150 11.1 – 26.6 6.7 82NH 3 200About2500007.4 – 11.2 1.9 96NO x 25.34 – 22.4 5.6 12HF 0.2 – 1.7 0.4AMI, Linz(nitrophosphateroute)Dust 20 6.8NH 3About3400000 – 10 0 – 3.4HF1.4 0.5BASF,Ludwigshafen(mixed acid routewith HNO 3 )Table 7.12: Achieved average emission levels and efficiencies for combined scrubbing[9, Austrian UBA, 2002, 78, German UBA, 2001][154, TWG on LVIC-AAF, 2006]: in the case of DAP production with multistage scrubbingwith H 3 PO 4 , HF levels of up to 10 mg/Nm 3 might be expected.Cross-media effectsEnergy consumption.Operational dataNo specific information provided.ApplicabilityOnly applicable for AN-based NPK production.Economics[9, Austrian UBA, 2002] lists the following costs:• investment: EUR 5600000• maintenance (4 % of investment) EUR 225000 per year.Large Volume Inorganic Chemicals – Ammonia, Acids and Fertilisers 315