Title :
Cement kiln NOx control
Author :
McQueen, A.T. ; Bortz, S.J. ; Hatch, M.S. ; Buening, H.J. ; Shore, D.E. ; Leonard, R.L. ; Bouse, E.F.
Author_Institution :
Radian Corp., Irvine, CA, USA
Abstract :
Cement kilns represent an important source of NOx emissions. The results of a critical analysis of the state-of-the-art in cement kiln NOx control are presented. A survey of current and anticipated cement kiln NOx regulations, NOx formation mechanisms and common NOx control technologies (as applied to boilers) is presented. Cement kiln features relating to NO x control, such as combustion characteristics and temperature and residence time profiles, are outlined. A comparison is made of NO x control technologies applicable to cement kilns. These include combustion, modifications, low NOx burners, staged combustion, selective noncatalytic reduction, and selective catalytic reduction. The criteria for comparing these NOx control technologies include the principle of operation, technical feasibility, potential NOx reduction, relative cost, and the potential effects on clinker quality. Conclusions and future directions in cement kiln NOx control are discussed
Keywords :
air pollution detection and control; boilers; cement industry; combustion; legislation; nitrogen compounds; standards; NOx; air pollution control; boilers; burners; cement kilns; clinker quality; combustion; cost; critical analysis; formation mechanisms; law; regulations; residence time profiles; selective catalytic reduction; selective noncatalytic reduction; standards; state-of-the-art; survey; temperature; Kilns;
Conference_Titel :
Cement Industry Technical Conference, 1993. Record of Conference Papers., 35th IEEE
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-0960-X
DOI :
10.1109/CITCON.1993.296981
