RICH/LEAN COMBUSTION APPARATUS

摘要

PROBLEM TO BE SOLVED: To enable stable combustion while further suppressing the generation of NOx. SOLUTION: In a rich/lean combustion apparatus, a flat rich mixing part 3 which has a flame hole 7 for a rich mixed gas formed on one end side and a flat lean mixing part 4 which has a flame hole 10 for a lean mixed gas formed on one end side are arranged side by side alternately across the width thereof while the flame hole 10 for the lean mixed gas is provided with a flow straightening plate 13 for straightening the lean mixed gas delivered from the flame hole 10 for the lean mixed gas at an attitude along the direction orthogonal to that of the parallel arrangement of the mixing parts. The flame hole 10 for the lean mixed gas is provided with a vortex forming member U broader than the flow straightening plate to generate a vortex by the flow of the lean mixed gas.