Test and numerical simulation of gas-solid flow in a moving-bed radial flow reactor
The gas-solid flow in a pilot-scale moving-bed radial reactor is studied by cold model test.The Eulerian two-fluid model of Fluent software is used to simulate the flow field characteristics of different flow patterns and scallop structures,and the pressure and velocity distribution of the reactor are analyzed.The results show that the error between the simulated value and the test value of the pressure difference between the scallop and the center pipe is less than 5%,and the pressure difference of the centripetal Z-shape configuration is slightly higher than that of the centripetal Π-shape.With the increase of gas velocity,the axial distribution of gas becomes worse,and the centripetal Π-shape gives better axial distribution than the centripetal Z-shape.The gas velocity between the D-shape scallops in the catalyst bed is lower than that at other positions,and the pressure distribution along the circumferential direction is uneven.In the range of simulated gas inlet velocity,the circumferential relative non-uniformity of the D-shape scallop is greater than 12%,while the saddle-shape scallop is below 5%.With the increase of gas velocity,the circumferential gas distribution effect of the saddle-shape scallop is better than that of the D-shape scallop.
moving-bed radial flow reactorgas-sold flowscallopcold model testEulerian two-fluid model
NETL
NSTL
万方数据
