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Influence of combustion parameters on NOx production in an industrial boiler
 

Summary: Influence of combustion parameters on NOx production
in an industrial boiler
M.A. Habib a,*, M. Elshafei b
, M. Dajani b
a
Mechanical Engineering Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
b
Systems Engineering Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
Received 11 June 2006; received in revised form 28 December 2006; accepted 14 April 2007
Available online 24 June 2007
Abstract
NOx formation during the combustion process occurs mainly through the oxidation of nitrogen in the combustion air (thermal NOx)
and through oxidation of nitrogen with the fuel (prompt NOx). The present study aims to investigate numerically the problem of NOx
pollution using a model furnace of an industrial boiler utilizing fuel gas. The importance of this problem is mainly due to its relation to
the pollutants produced by large boiler furnaces used widely in thermal industrial plants. Governing conservation equations of mass,
momentum and energy, and equations representing the transport of species concentrations, turbulence, combustion and radiation mod-
eling in addition to NO modeling equations were solved together to present temperature and NO distribution inside the radiation and
convection sections of the boiler. The boiler under investigation is a 160 MW, water-tube boiler, gas fired with natural gas and having
two vertically aligned burners.
The simulation study provided the NO distribution in the combustion chamber and in the exhaust gas at various operating conditions

  

Source: Aldajani, Mansour A. - Department of Systems Engineering, King Fahd University of Petroleum and Minerals

 

Collections: Engineering