Large Volume Inorganic Chemicals - Ammonia ... - ammk-rks.net
Large Volume Inorganic Chemicals - Ammonia ... - ammk-rks.net Large Volume Inorganic Chemicals - Ammonia ... - ammk-rks.net
Chapter 6Achieved environmental benefitsHigher efficiency.Cross-media effectsThe following numbering refers to the numbering in Table 6.9.3) the downside of this process is the emission to air of about 2 – 5 % of the flotation chemicalsas organic carbon in the form of cracked products.Operational dataNo information provided.ApplicabilityThe following list refers to the numbering in Table 6.9.1) applicable for new and existing plants2) generally applicable3) generally applicable4) generally applicable.EconomicsThe following list refers to the numbering in Table 6.9.1) very high investment costs for existing plants2) relatively low investment costs3) high investment costs4) significant investment, high maintenance costs.Driving force for implementationProcess optimisation and increasing the plant capacity for a given kiln. Lower corrosion risksand more stable reaction.References to literature and example plants[22, CEFIC, 2000], Lanxess (fluorspar preheating), Arkema (kneading for one kiln),Derivados del Fluor SA (H 2 SO 4 preheating).268 Large Volume Inorganic Chemicals – Ammonia, Acids and Fertilisers
Chapter 66.4.2 Energy recovery from kiln heatingDescriptionThe kiln shell exit gas temperature goes up to about 400 °C, depending on the HF productionrate (expressed as tonne HF/m 2 of kiln shell surface area). Several heat recovery systemsremove the excess heat to reduce the gas temperature down to 200 / 250 °C. This recovered heatis either used to preheat reactant feeds, the combustion air, or by other fluids in the productionunit.Achieved environmental benefitsEnergy savings. The recovered energy for the whole installation is estimated to be around 20 %of the total energy used.Cross-media effectsNone believed likely.Operational dataNo information provided.ApplicabilityGenerally applicable for new installations.The installation of a recovery system for an existing plant might encounter technical limitationsin specific cases. When it is possible to install a recovery system, the associated cost andmodifications are usually disproportionate compared with the actual energy savings.EconomicsNo specific information provided.Driving force for implementationEnergy and cost savings.References to literature and example plants[22, CEFIC, 2000]Large Volume Inorganic Chemicals – Ammonia, Acids and Fertilisers 269
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Chapter 6Achieved environmental benefitsHigher efficiency.Cross-media effectsThe following numbering refers to the numbering in Table 6.9.3) the downside of this process is the emission to air of about 2 – 5 % of the flotation chemicalsas organic carbon in the form of cracked products.Operational dataNo information provided.ApplicabilityThe following list refers to the numbering in Table 6.9.1) applicable for new and existing plants2) generally applicable3) generally applicable4) generally applicable.EconomicsThe following list refers to the numbering in Table 6.9.1) very high investment costs for existing plants2) relatively low investment costs3) high investment costs4) significant investment, high maintenance costs.Driving force for implementationProcess optimisation and increasing the plant capacity for a given kiln. Lower corrosion risksand more stable reaction.References to literature and example plants[22, CEFIC, 2000], Lanxess (fluorspar preheating), Arkema (kneading for one kiln),Derivados del Fluor SA (H 2 SO 4 preheating).268 <strong>Large</strong> <strong>Volume</strong> <strong>Inorganic</strong> <strong>Chemicals</strong> – <strong>Ammonia</strong>, Acids and Fertilisers