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

Chapter 66.4.8 Abatement of dust emissions from drying, transfer and storageDescriptionIn the production of HF, the main sources for dust emissions are:• CaF 2 dust emission, from fluorspar drying (directly heated dryers), transfer (pneumaticconveying) and storage• CaSO 4 dust emission, from anhydrite treatment• CaO and/or Ca(OH) 2 dust emission from transfer and storage.The abatement techniques include cyclones, filters and wet scrubbers.Achieved environmental benefitsReduction of dust emissions.The BAT associated emission levels given in [11, European Commission, 2003] are presentedin Table 6.13.Emission levelRemoval rateTechnique mg/Nm 3 %Fabric filter 2 – 10 99 – 99.9Dry or wet cyclone 20 – 99Wet scrubber 50 – 99Table 6.13: Selected abatement techniques and corresponding achievable dust emission levels[11, European Commission, 2003]Cross-media effectsWet scrubbing creates an additional waste water stream.Operational dataNo specific information provided, see also [11, European Commission, 2003].ApplicabilityGenerally applicable.EconomicsNo information provided.Large Volume Inorganic Chemicals – Ammonia, Acids and Fertilisers 277