Patent ID: 9371252
Filing Date: 2016-06-21
CPC Classification: C04B,F27B,F27D,Y02P

Claim Text:
1. An apparatus for producing cement clinker comprising: a. a first preheater for preheating raw cement meal, and a second preheater for preheating raw cement meal, b. a calciner in the form of a fluidized bed reactor, said calciner precalcining the preheated raw cement meal, said calciner having means for delivering fuel, means for delivering combustion air having an oxygen content of at least 75 mol % and means for delivering preheated raw cement meal, said calciner having a calciner exhaust gas duct connected to said second preheater and delivering exhaust gases of the calciner to the second preheater, said second preheater connected to a CO2 preparation device and delivering the exhaust gases of the calciner to the CO2 preparation device, and c. a kiln burning precalcined raw cement meal, said kiln having a kiln exhaust gas duct connected to said first preheater and bypassing said calciner to deliver the kiln exhaust gases occurring in the kiln into the first preheater to directly contact the contents of the first preheater characterised in that said calciner has means for removing precalcined raw cement meal, said means for removing precalcined raw cement meal being arranged below an expansion point of said fluidised bed reactor and being connected to said kiln, characterised in that said calciner has a porous or perforated inflow base to which is connected said means for delivering combustion air.