Process for purifying the exhaust gas from plants for the production of cement clinker

摘要

A process and a plant are described for the purification of waste gases of plants for the production of cement clinker, the hot waste gases exiting a preheating zone in a multistage filter zone being initially freed from dust in a first filter stage and then purified in a further filter stage from NHx compounds, heavy metals and trace pollutants, SO2 and NOx. To achieve a particularly effective and economical purification, the waste gases of the preheating zone, prior to the first filter stage, are adjusted to a filter zone intake temperature such that in this first filter stage, in addition to the dust, at least part of the readily volatile polluting elements and polluting compounds are eliminated from the waste gases. …IMAGE…