Heat absorption space features of mine ventilation air methaneoxidized bed affected to bed heat absorption

Based on the efficiency of the mathematical model verified with the experiment and the heat absorption from the mine ventilation air oxidized bed, a numerical study method was applied to study the heat absorption space features(honeycomb ceramic filling rate and honeycomb ceramic hole opening rate) of the mine ventilation air methane oxidized bed affected to the heat absorption. The calculation results showed that when the honeycomb ceramic filling rate of the heat absorption space increased, on one hand, the bed physical velocity of the oxidized bed would be increased, the gas flow rate around the external wall of the heat exchanger would be increased and the convection heat transfer of the heat exchanger would be enhanced. On the other hand, the gas flow of the heat exchanger directly to the convection heat exchanger was reduced, the heat absorption of the heat exchanger was weakened, the honeycomb ceramic filling rate of the heat absorption space would increase the contradiction dual characters of the heat absorption, which would make the heat absorption rate of the heat exchanger firstly increased and then decreased. When the filling rate was 0.49, there would be the maximum existed in the heat absorption rate of the internal heat exchanger within the oxidized bed. The hole opening rate of the filling honeycomb ceramics in the heat absorption space reduced would cause a mismatch of the resistance between the heat exchanger area and the honeycomb ceramic filling area within the heat absorption space, the gas would be priority to select the area of the heat exchanger with a small resistance and would enhance the heat absorption of the heat exchanger. But the resistance difference of the heat exchanger too high would affect the distribution uniformity of the downstream bed gas in the heat absorption are and the hole opening rate of the filling honeycomb ceramic in the heat absorption space would be 0.64 as selected.