Abstract: A gas-particle two-phase model (IPSA model) is used to simulate gas-particle flows in a louver pulverized-coal concentrator, which is the key element of Horizontal bias combustion burners. The distribution of gas static pressure, gas-particle velocity and pulverized-coal concentration in the concentrator are simulated and presented. The gas-particle flow pattern in this equipment is given and the concentrating mechanism is analyzed. From the simulation, a belt-shape zone with high particle concentration is found near and over the louver blades, and a local high particle concentration zone connected with the belt is found at the center of the concentrator’s fuel-rich exit, which is the major characteristic of the louver concentrator and coincides with the phenomena observed in experiments. Other parameters are also calculated at different position of the concentrator distribution baffle, which generally agree with the experiment data. The trend of these parameters is correctly simulated.

Key words: Gas particle two-phase flow, Numerical simulation, Pulverized-coal bias combustion