Numerical Simulation on Resistance of the Combined Regenerative Oxidation Bed

Thermal reverse flow reactor is effective for the oxidation of coal mine ventilation air methane. The resistance of the regenerative oxidation bed in this device is numerically investigated using porous medium model by fluent software in this paper. The pressure loss in the square honeycomb ceramic oxidation bed is larger than that in hexagonal honeycomb ceramic oxidation bed, but the outlet temperature is lower. Then a combined oxidation bed which consisted of square and hexagonal honeycomb ceramic is proposed, in which the hexagonal honeycomb ceramic is filled in the central of the combined bed, and the square honeycomb ceramic is filled in the two sides. The resistance loss and outlet temperature for seven kinds of combined beds are calculated. The results indicate that the suitable length of hexagonal ceramics in the combined oxidation bed is ranged from 1m to 1.4m.