Treatment process for flue gases from a steam generation plant having a plurality of boiler units and a slag tap fired furnace assigned to each boiler unit

摘要

Treatment process for flue gases from a steam generation plant having a plurality of boiler units and a slag tap fired furnace assigned to each boiler unit having a slag trapping grid arranged at the molten ash chamber outlet, using a three-stage treatment of the flue gases, a) in the form of an addition of additive to bind SOx, b) in the form of a solids precipitation to separate the solids from the flue gases and c) in the form of thermal exploitation of the heat energy contained in the solids, the flue gas purification by means of boiler-side addition of additives in a multiplicity of the boilers being combined with the external flue gas purification downstream of the boiler units without boiler-side addition of additives, and recycling of the precipitated solids being carried out in the combustion chambers of the boiler units without boiler-side addition of additives. IMAGE