Determination of Pressure Drop Correlation for Air Flow through Packed Bed of Sinter Particles in Terms of Euler Number

Abstract

In order to clearly understand the air flow resistance characteristics in vertical tanks for sinter waste heat recovery in the steel industry, experimental research on the air flow pressure drop (FPD) performance in a sinter bed layer (BL) was conducted. Based on a self-made experimental device, the measurement values of air FPD for different experimental conditions were determined firstly, and then the concept of Euler number (Eu) in heat exchangers was introduced into the study of air FPD in BL; the change rules of Eu under different particle diameters were analyzed. Finally, the air FPD correlation in sinter BL was obtained and described in the form of Eu, and the error analysis of obtained air FPD correlation was performed. The results show that, the air FPD increases as a second power relationship with the increase in air superficial velocity when the particle diameter is constant. The decrease amplitude of Eu gradually dwindles when increasing the Reynolds number (Re), and the decrease in the Eu shows a reciprocal relationship with the Re. As the bed geometry factor increases, the FPD coefficient, A, decreases as an exponential relationship, while the FPD coefficient, B, increases as a first power relationship. The obtained air FPD correlation in the form of Eu in the experiment is well compatible with the measurement values, and the mean deviation of obtained correlation is 4.67%, showing good originality.

A Study of a Two-Phase Heat Transfer Mechanism in a Vertical Sintering Cooling Furnace

“…The basic law of gas-solid heat transfer process in vertical tank of sinter waste heat recovery was studied in combination with experiment and numerical simulation [8]. The air pressure drop performance in the sinter bed was studied experimentally, and the correlation of air FPD in the sinter BL was described in the form of Eu [9]. TIAN et al [10] established a numerical calculation model of threedimensional flow and heat transfer in the ring cooler, optimized and analysed the operating parameters of the ring cooler, and established a model with the exergic heat recovery as an objective function [11].…”