The nozzle layout of the high efficient spray tower in OG (Oxygen Converter Gas Recovery) system of the primary dedusting for the converter has an important role on the cooling effect and operating reliability of the spraying system. The discrete phase model was used to simulate the nozzle layout of the high efficiency spray tower. The nozzle layouts of the inlet and main section of the high efficiency spray tower were discussed, and the influence of the nozzle direction and the number of spray layers on the air distribution and cooling effect in the atomizing field were also analyzed. The results showed that the spraying direction of the nozzle and the number of spray layers in the tower had great influence on the air distribution and cooling effect of the atomization field. When the inlet section of the spray tower adopted countercurrent injection, the velocity distribution of the outlet cross section was the most uniform and the cooling effect was the best. When the number of spray layers in the main section of the high efficiency spray tower was five, the flow field of the flue gas in the tower was relatively uniform, and the velocity in the center area was in the range of 2~4 m/s, which helped to increase the time of interaction between gas and droplets. With the increase of the number of spray layers, the temperature gradient in the tower also increased and the distributions of water vapor mass fraction and temperature correspond to each other, and then the average turbulent energy in the tower also gradually increased. Through the above research, the reasonable arrangement of nozzle in the high efficiency spray tower was obtained. The results can provide a theoretical basis for the optimization and improvement of the high efficiency spray tower in the new OG system.
Fuping QIAN Xiaoping HUANG Bowen CAO Yongjun XIA Jia HU Deming SHI Yunlong HAN
. Effect of nozzle layout in high efficient spray tower of new OG system of primary dedusting system for converter on spray characteristics[J]. The Chinese Journal of Process Engineering, 2019
, 19(3)
: 500
-509
.
DOI: 10.12034/j.issn.1009-606X.218255
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