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

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