GAO Zhenqiang1,2 , LIU Ruixiang 1, He Mengmeng 1,LIU Yongqi1, LUO Xianglei 1
(1．School of Transportation and Vehicle Engineering，Shandong University of Technology，Zibo，Shandong 255049；2 .School of Energy and Power Engineering，Xi’an Jiaotong University，Xi’an，Shaanxi 710049)
Abstract: Taking into account the effects of convection．conduction and radiation on the heat transfer in a thermaIflow reversal reactor for ventilation air methane oxidation，the energy balances for gas phase and solid phase were mathematical modeled．Researches on lhe heat transfer in the hodzontaI honeycomb ceramic oxidation bed during ventilation breakdown were carded out both experimentally and numerically，and the calculation results showed a good agreement with the experimental results．The results show that gas phase flows ve ry slowly in certain directions due to the stack effect and affects the heat transfer notably．The location of the high temperature zone moves downstream to the end of the ceramic oxidation bed。which is very dangerous for the downstream piping system．Heat transmission through insulation blanket along radial direction has no effect on the shift of the high temperature zone，but great effect on preventing the rising of the temperature of the downstream ceramic bed．Heat transmission through insulation blanket makes the most contribution to heat loss，convection takes the second place，and conduction and radiation along axial direction take the last place．
Key words: honeycomb ceramics；heat transfer；ventilation breakdown；ventilation air methane(VAM)