固定床反应器内气体预分布器研究

研究了直径1 000 mm,高3 000 mm的固定床冷模装置中气体预分布器对反应器内气流分布的影响。结果表明:气体分布器可改变床层内气流流形并使径向气流的速度分布趋于均匀;随着表观气速的增加,反应器内气流的不均匀程度增加;分布器的环隙高度在一定的范围可使反应器内气流的不均匀程度相对较好。应用计算流体力学软件CFX对固定床反应器内的流场进行模拟计算,并与大型冷模试验测试结果进行比较,模型计算值和冷模试验测量值吻合较好。     

轴向流固定床内流场的数值模拟与实验验证

The computational fluid dynamics model with porosity and drag coefficient was used to describe fluid flow in an axial flow fixed bed according to the characteristics of fluid flow in the fixed-bed of the reactor. The commercial computational fluid dynamics (CFD) code CFX was used to simulate the flow field in the axial flow fixed bed. The simulation predictions are in good agreement with experimental results of a large cold model. The influence of gas distributor on the flow field in the axial flow fixed bed was studied. A suitable gas distributor was used to attain less than 0.06 kPa radial pressure difference and less than 5.2% radial velocity difference in fixed bed.