The gas?liquid two-phase coupled flow of the atomization field in the nozzle of the high efficiency spray tower of new oxygen converter gas recovery (OG) system of primary dedusting system for converter was simulated by using the discrete phase model. The influences of the spray angle, the atomizer pressure, the atomizer mass flow rate and the horizontal distance between two nozzles on Sauter mean diameter (SMD) and the evaporation efficiency of the atomization field were analyzed. The results showed that with the increase of the spray angle, the coverage of the droplet in the atomization field was wider, the droplet residence time was longer, the evaporation efficiency of the droplets increased, and the SMD of the atomization field decreased. When the injection angle was greater than 60o, the SMD decreased slowly. With the spray pressure increased, the evaporation efficiency of the droplets increased, and the atomization field SMD decreased. When the pressure was greater than 1.0 MPa, the influence of the spray pressure on SMD was small. With the increase of jet mass flow rate, the evaporation efficiency of the droplets decreased, and the SMD of the atomization field increased. When the flow rate was less than 0.15 kg/s, the SMD had not much increase. The larger the horizontal distance between two nozzles, the wider the droplet distribution, but the horizontal distance had less impact on the atomization field SMD. Under certain conditions, when the nozzle distance was about 800 mm, the cross-sectional velocity distribution was more uniform.
Xiaoping HUANG Fuping QIAN Laiyong WANG Yongjun XIA Jia HU Deming SHI Yunlong HAN
. Simulation of Atomization Characteristics in High Efficient Spray Tower Nozzle of New OG System of Primary Dedusting System for Converter[J]. The Chinese Journal of Process Engineering, 2018
, 18(3)
: 461
-468
.
DOI: 10.12034/j.issn.1009-606X.217299
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