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

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

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Chapter7ParameterLevelmg/Nm 3Phosphate rock digestion, sand washing, NO x as NO 2 100 – 425CNTH filtration Fluoride as HF 0.3 – 5Removalefficiency in %NH 35 – 30 xNeutralisation, granulation, drying, coating,coolingFluoride as HF1 – 5 xxDust 10 – 25 >80HCl 4 – 23x the lower part of the range is achieved with nitric acid as the scrubbing medium, the upper part of the range isachieved with other acids as the scrubbing medium. Depending on the actual NPK grade produced (e.g. DAP),even by applying multistage scrubbing, higher emission levels might be expectedxx in the case of DAP production with multistage scrubbing with H 3 PO 4 , levels of up to 10 mg/Nm 3might be expectedTable 7.14: Emission levels to air associated with the application of BAT<strong>Large</strong> <strong>Volume</strong> <strong>Inorganic</strong> <strong>Chemicals</strong> – <strong>Ammonia</strong>, Acids and Fertilisers 321

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