Abstract:
Based on the principle of two-color method, the mixed oil slurry of fluid catalytic cracing slurry and diesel fuel are used as fuel, where fluid catalytic cracing slurry mass concentration is 0, 10%, 30%, respectively. The non-premixed flame temperature field and soot concentration field of different oil slurry are constructed at molar ratio of oxygen to carbon of 0.8, 0.9, 1.0, 1.1, 1.2, respectively. From the hypothesis based on the fact that the nozzle flame section is circular, the percentage of soot volume per unit of flame volume is obtained. Studies have shown that the flame can be divided into flame core(oxygen-rich combustion zone), inner flame (oxygen-poor combustion zone), outer flame. The flame core and outer flame have a higher temperature and the temperature of the inner flame is lower. The soot is more in the inner and outer flame and is the most in the inner flame. In the transition from the flame core to the inner flame, the temperature decreases and the soot concentration rises. In the transition zone from the inner flame to the outer flame, the oxygen concentration increases, the temperature rises, and the soot concentration decreases. The more the catalytic slurry content in the slurry, the more soot is produced when the slurry contains the same ratio of oxygen to carbon. When the oxygen-carbon ratio of the slurry is increased, the flame temperature rises and the soot concentration decreases.