Modeling of heat gas flow through a moving packed bed

摘要

In this paper, high heat penetration into feed stream within horizontal pipe is described mathematically with a comprehensive gas flow and heat transfer model. Considering the complicated influence of varied factors on the gas flow and heat transfer, the transient distribution of gas velocity, the temperature field of gas and solid in the packed bed of particle are examined for different conditions. The results show that the thermal infection to the moving packed-bed particles by the seepage flow fluid is high only in the position near the gas entrance. The thermal penetration depth tends to increase with the seepage flow velocity. In the thermal penetration influence field, the porosity of solid bed has importance effects on the gas velocity and temperature field. The work results are useful in the conceptual design of the moving bed and grain feeder and protection of the feeder from thermal seepage of the high temperature fluid in the reactor.