Study on Combustion and Deposition Characteristics of Coal Particles in a Cyclone Burner

Combustion and deposition characteristics of coal particles in a cyclone burner were studied by numerical simulation and experiments. Results show that the burner can realize high-temperature combustion (above 1 700 K) at different loads, with high combustion efficiency and slag captured rate. Particles mainly deposit on the front wall, evenly distributed on both the upper and lower part. Smaller particles can follow well with the airflow, and are hard to deposit. Almost all the particles larger than 60 μm can deposit and burn on the front wall. To get uniform distribution of coal particles on inner wall of the burner, and prevent them from jamming in the low-temperature region, it is recommended to apply an appropriate excess air coefficient and a primary air ratio within 0.30-0.35.