Colecciones nacionales e internacionales de patentes

1. (WO2018025482) METHOD FOR OPERATING CEMENT KILN

Pub. No.:    WO/2018/025482    International Application No.:    PCT/JP2017/020179
Publication Date: Fri Feb 09 00:59:59 CET 2018 International Filing Date: Thu Jun 01 01:59:59 CEST 2017
IPC: C04B 7/44
F27B 7/36
F27D 17/00
Applicants: TAIHEIYO ENGINEERING CORPORATION
太平洋エンジニアリング株式会社
Inventors: SUZUKI Hideto
鈴木 英人
Title: METHOD FOR OPERATING CEMENT KILN
Abstract:
[Problem] To reduce the concentration of both SOx and NOx in combustion gas discharged from a cement kiln. [Solution] A method for operating a cement kiln 7, comprising adjusting the oxygen partial pressure in a kiln end 5 of the cement kiln 7 to 4 to 7% to suppress generation of SOx from cement starting material R3 and clinker inside the cement kiln 7, and blowing fuel F2 and combustion air A into the kiln end 5 through a denitration burner 6 to decompose NOx included in exhaust gas G1 of the cement kiln 7 that passes inside the kiln end 5. The fuel F2 and the combustion air A can be blown through a plurality of burners provided in the kiln end 5 of the cement kiln 7. The fuel F2 may include one or more selected from pulverized coal, heavy oil, natural gas, coal ash, and gasified combustible waste or combustible substance.