HT GAS BURNER WITH HIGH TURNDOWN RATIO PRINCIPLES AND ITS APPLICATIONS

An HT gas burner with very high turndown ratio was developed and utilized specially for low and moderate temperature furnaces. The burner was equipped with a combustion chamber of dual swirlers design. Therefore, an intensive recirculation zone was formed to stabilise its flame. A turndown ratio of its load could reached as high as 50: 1. The burner could also operated at very high efficiency of combustion. In order to get a longer life of the burner a combined cooling method had been employed to protect its flame tube successfully so that the highest wall temperature was no more than 850 K, well below the material's oxidising temperature.