SCALING LAW FOR POLLUTANT EMISSION FROM A COMBUSTION FURNACE

A scaling law for the emission of a pollutant from a combustion furnac e is proposed and its adequacy is examined experimentally. Factors aff ecting the emission of a pollutant were selected and the scale effect on these factors was determined. It was found that the flow pattern an d the micro and macro mixing times have to coincide in the scale-up to maintain a constant emission level. A scaling law for constant reside nce time was derived to keep the micro and macro mixing times constant . This scaling law was applied to a practical burner and a cube-root l aw was deduced. The adequacy of this scaling law was confirmed by NO(x ) emission data for three practical burners of different types.