Treatment of exhaust gases from cement clinker production

(22) 08.04.2016

(43) 28.09.2017

(57) A method for the treatment of exhaust gases from the production of cement clinker in a rotary kiln, in which raw materials are ground in a mill to form raw meal, raw meal is preheated in a counterflow configuration in a preheater with exhaust gas from the rotary kiln and is optionally pre-calcinated, preheated and possibly pre-calcinated raw meal is supplied to the rotary kiln and is burned in the rotary kiln to form cement, the exhaust gas from the rotary kiln is, before entering the preheater, denitrogenized by way of selective non-catalytic nitrogen oxide reduction with a reagent which provides ammonia, and wherein, according to the invention, the exhaust gas from the preheater is subjected to gas conditioning and catalytic oxidation of ammonia. The object is furthermore achieved by way of a device for gas conditioning and catalytic oxidation, which device is arranged between preheater and mill.

(71) HeidelbergCement AG