活性炭多管外热式活化炉热工过程数值模拟

Numerical simulation of thermal process of activated carbon multi-tube external heat activation furnace

针对活性炭活化工序烧损严重的问题,提出了一种烟气与物料相互隔离的多管外热式活化炉方案。通过将物料颗粒等效为多孔介质A和流体B,克服了堆积物料与载气流体传热模拟的困难。建立了活化炉热工过程数值模型,运用仿真模拟手段预测了活化炉内的流场和温度场分布,验证了新方案的可行性。进一步运用正交试验方法结合仿真模型,对新方案进行了优化设计,获得了最优设计参数,优化结果较未优化前出口料温增加了13.7%。

Aiming at the serious burning loss of activated carbon activation process,a multi-tube external heating activation furnace scheme was proposed,in which flue gas and material were separated from each other.By comparing the equivalent material particles to porous media A and fluid B,the difficulty of stacking material and heat transfer simulation of carrier gas fluid was overcome.A numerical model of the thermal process of activation furnace was established.The distribution of flow field and temperature field in the activation furnace was predicted by means of simulation,and the feasibility of the new scheme was verified.Furthermore,the orthogonal test method and simulation model were used to optimize the design of the new scheme,and the optimal design parameters were obtained.The optimized results showed that the outlet temperature increased by 13.7%compared with that before optimization.