射流携带床反应器液体停留时间分布及模拟

对射流携带床液体停留时间分布进行了研究，考察了液体流量、气体流量和气体动量对液体停留时间分布的影响。结果表明，增加液体流量使停留时间分布密度曲线变得高而窄，且平均停留时间变短；气体流量增大使得停留时间出峰略有提前，气体流量大于4L/min时，继续增大气体流量对液体停留时间分布影响较小；当液体流量小于60L/h时，气体动量对液体停留时间的影响较明显，主要表现气体动量越大液体平均停留时间越长。基于实验结果分析及实验中观测的现象，将射流携带床内液体流动结构分为中心区和壁面区进行研究，建立了描述射流携带床内液体停留时间分布的数学模型，模型模拟结果和实验数据吻合良好。

Liquid residence time distribution in an entrained flow reactor

Liquid residence time distribution in an entrained flow bed was studied. The effect of liquid flux, gas flux and gas momentum on the liquid residence time distribution was investigated. As the liquid flux increase, the curve of the liquid residence time distribution becomes higher and narrower and the mean residence time becomes shorter. The liquid residence time distribution moves forward when the gas flux increases, but the effect recedes when the gas flux is over 4L/min. The gas momentum has a great effect on the liquid residence time distribution when the liquid flux is smaller than 60L/h, and the larger the gas momentum, the longer the mean residence time . The liquid flow pattern was studied in both center section and wall section based on the experimental value analysis and the phenomenon in the experiment. The mathematic model is established to simulate the liquid residence time distribution in the entrained bed, and the simulating value is fitted well with the experimental value.