The fluidized reactor is widely used in a number of chemical processes due to its high gas-particle contacting efficiency and excellent performance on solid mixing. An improved numerical framework based on MP-P1C (multi-phase-particle-in-cell) method has been developed to simulate the processes of gas-solid flow and chemical reactions in a fluidized bed. Experiments have been carried out on a 3MW circulating fluidized bed with the height of 24.5m and cross-section of 1m~2. Simulations and experiments were carried out under different operation conditions. Distributions of temperature, volume fraction, mean diameter, velocity and pressure were calculated.The results show that the distribution of gas-solid properties had better accuracy compared with the traditional Eulerian-Eulerian approach. The temperature of feed coal point is the highest because of fast pyrolytic reaction and volatile combustion, then the temperature decreases with the decrease of oxygen concentration.With the injection of fresh air at the secondary air inlets, the temperature increase to a new level. The distributions of temperature and gas concentration along the furnace have achieved a good accuracy compared with experimental data indicating that this numerical framework is suitable for solving complex gas-solid flow and reactions in fluidized bed reactors.
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