PURPOSE: To provide a good effect capable of restraining the generation of nitrogen oxides, by a method wherein thick combustion and thin combustion as well as fine divided combustion are carried out independently together with strong recirculating flow combustion.
CONSTITUTION: A front plate 2 having a diameter larger than the diameter of a gas tube is provided at the tip end of the gas tube 1. A plurality of sheets of rear plate in contact with an air tube are provided on the outer periphery of the gas tube on the slightly upstream side of the front plate 2. The rear plate is constituted of a plate having a size capable of forming a sufficient recirculation area on the downstream side of the same. Gas injection tubes communicating with the gas tube are provided at both ends of the rear plates. The gas injection tube is provided with gas holes 3 for injecting gas radially.
OGI KEIICHI
KAIYA KAZUO
