Simulation on spray evaporation processes in Multi-spout bed by modified impinging wall method
CHEN Guo-qing1, GAO Ji-hui1, MENG Qing-xin2, GAO Jian-min1, QIN Yu-kun1
1.Combustion Engineering Research Institute,Harbin Institute of Technology,Harbin 150001,China;2.Wuzhou Engineering Design and Research Institute,Beijing 100053,China
Abstract:
Basing on some researchers’ experimental results,the droplet impinging wall model was modified,and We Number and K Number were adopted to determine the mode of droplet impinging wall.The simulation results indicated that the mode of impinging droplet is sticking on the wall in Muti-spout bed.The droplet impinging wall model modified can describe the droplet impinging wall phenomenon accurately in the multistage spouted fluidized flue gas desulfurization reactor.Basing on the study above,the distributions of temperature and relative humidity in the reactor were attained.In atomization region,the distribution of temperature exhibits "M" shape.The relative humidity exhibits"W"shape.The mass concentration of droplet reduces along axis of the reactor.Due to the multi-spouted configuration,droplet concentration increases obviously in the intersection region between the 1st and 2nd stage reaction region.The evaporating intensity reaches its peak value in the area of 200 mm away from the sprayer,and droplets are completely evaporated at 1500 mm.
Key words: impinging wall evaporation characteristics temperature and humidity spray drying
DOI：10.11916/j.issn.1005-9113.2011.01.006
Clc Number:X701.3
Fund:
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Simulation on spray evaporation processes in Multi-spout bed by modified impinging wall method
本站小编 哈尔滨工业大学/2019-10-23
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