Abstract: The effect of the upper air intake mode of a resin decomposition reactor in China Institute for Radiation Protection (CIRP) was investigated through numerical simulation method. It was found with this kind of simulation that there are some problems such as low air utilization rate, heat loss caused by air flow, and temperature decrease in resin decomposition reaction zone. The air intake mode of the equipment was improved through the numerical simulation method with a lower air intake mode which resulted in better air utilization rate and more uniform air distribution. However, in this case, the weakening effect of air on the temperature in reaction zone was also more obvious. In addition, as the diameter of the air inlet of the device decreases and the number of air inlets increases, the air distribution uniformity of the resin reaction zone can be significantly improved, and increasing the heating power of the device has a significant effect on increasing the temperature of reaction zone.

Key words: intake mode, numerical simulation, optimization design