公开(公告)号：US10914522B2

公开(公告)日：2021-02-09

申请号：US15758191

申请日：2016-08-30

申请人： HOLCIM TECHNOLOGY LTD

发明人： Irwin Gafner

IPC分类号： F27B7/20 ,  C04B7/36 ,  F27B7/36 ,  F27D17/00 ,  F23K3/02 ,  F23L7/00 ,  F27B7/00 ,  F23C9/00 ,  F23D99/00

摘要： In a method for reducing the NOx emissions of a rotary kiln of a clinker production plant, fuel supplied through a burner of the rotary kiln is burned along with primary air fed through the burner, wherein the primary air has a lower oxygen content and the primary air has an oxygen content reduced relative to that of the ambient air and a temperature increased relative to that of the ambient air, and the primary air is obtained by mixing ambient air with exhaust gas from the rotary kiln or from a heat exchanger connected to the rotary kiln and used for preheating raw meal. The primary air is further obtained by mixing with hot air, in particular waste air from a clinker cooler.