Patent ID: 8784097

Claim:
Apparatus for the production of clinker from raw meal, comprising a rotary kiln ( 8 ); (a) a multistage cyclone preheater ( 9 ) connected downstream of said rotary kiln ( 8 ) in relation to the direction of flow of the fumes ( 11 ) of a combustion taking place in said kiln ( 8 ); (b) an electrofilter ( 10 ) connected downstream of said preheater ( 9 ) in relation to said direction of flow of the combustion fumes ( 11 ); (c) characterised in that it comprises a first inlet ( 17 ) for the feeding of raw meal to said combustion fumes ( 11 ), said inlet ( 17 ) being placed downstream of said preheater ( 9 ) and upstream of said electrofilter ( 10 ) in relation to said direction of flow of the combustion fumes ( 11 ), and in that it comprises a second inlet ( 18 ) for the feeding of partially preheated raw meal ( 14 ) from said electrofilter ( 10 ) to said preheater ( 9 ) said apparatus further comprising apparatus for purifying the combustion fumes cleaned of dust exiting the electrofilter from further pollutants and/or apparatus for recovering their heat wherein the apparatus for purifying the combustion fumes cleaned of dust exiting the electrofilter comprise NOx lowering means and/or a sulphur lowering device.