Experimental investigation of NOX reduction using a hybrid fuel lean reburning system

Abstract

The main goal of this study is to examine the use of a hybrid -fuel lean reburning system with air staging for NOx reduction. The experimental variables include the reburn fuel fraction, sizes of rebum- fuelinjection nozzles, oxygen enrichment ratio, and location of reburn- fuel- injection. The effect of the flow field induced by air- staging combustion on NOx reduction is considered, and then, the NOx reduction rate is compared with only fuel lean reburning system. On the basis of the effectiveness of each De-NOx process, the advantage of using the hybrid reburning system with air staging is determined and discussed.