Moving‐bed solids flow in an inclined pipe leading into a fluidized bed: Part I. Gas leakage and pressure drop

Abstract

For moving-bed solids flow in an inclined pipe leading into a fluidized bed, the pressure drop across the pipe is a retarding force while the gas leakage rate alters the flow properties of the solids. The pressure drop has been related to the pipe exit pressure, which, in turn, can be calculated by integrating the solids bulk density over the bed depth. A correlation for the rate of gas leakage in terms of the geometric features and operating conditions of the system is developed. The correlation agrees with experimental data to within &25a/,. Part lI of this paper will deal with solids flow. Manhattan, Kansas 66506of the design and operating parameters of the system, namely, the transfer line length, particle size, fluidizing gas velocity, fluidized bed height, feed position, and free board pressure. CONCLUSIONS A N D SIGNIFICANCEThe pressure drop and the rate of gas leakage, which are two important factors influencing the solids flow, were studied in this paper. It was found that the pressure drop across the pipe is closely related to the pressure at the Present address inr Chen is COP Process Diviainn, DmTver C , Riverside, Address all ourrerpondence to U'nlnwender at Kansas State C'niv. 0 0 0 1 -1~4 1 -~0 -3 0 8 T -0 0~4 -~0~. 9 5 .