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作 者:冯浩 王杰 隋春杰 陈伟[1] 张斌[1] FENG Hao;WANG Jie;SUI Chunjie;CHEN Wei;ZHANG Bin(College of Electromechanical Engineering,Qingdao University of Science and Technology,Qingdao 266061,China)
机构地区:[1]青岛科技大学机电工程学院,山东青岛266061
出 处:《山东科学》2024年第4期75-83,共9页Shandong Science
基 金:山东省重点研发计划项目(2019GHY112002)。
摘 要:浸没燃烧蒸发技术是以高温烟气为热源与液体直接接触蒸发的换热技术,但现有研究中缺少浸没燃烧蒸发过程的热态模拟研究和蒸发器内分布盘倾角对蒸发效果的影响。基于欧拉法对分布盘型浸没燃烧蒸发器的结构参数进行热态数值模拟研究。通过气液两相流研究获得了蒸发器内部烟气分布,并探究了不同分布盘倾角对蒸发量和压力波动的影响。数值模拟结果显示,分布盘倾角影响烟气在液体中的分布效果,增加分布盘角度可以减小浸没管入口压力波动,从而提高燃烧器内背压稳定性,减小分布盘角度,增强气液间换热效果,从而提高蒸发效率。Submerged combustion evaporation technology is a heat exchange technology that uses high-temperature flue gas as the heat source to evaporate the liquid in direct contact with it.However,existing research lacks thermal state simulations of the immersed combustion evaporation process and investigations on the impact of the inclination angle of the distribution disc inside the evaporator on the evaporation.In this study,we conducted a thermal state numerical simulation on the structural parameters of the distributed disc-type submerged combustion evaporator using the Euler method.Herein,the flue gas distribution inside the evaporator was obtained by studying the gas-liquid two-phase flow.Additionally,the impact of different distribution disc inclination angles on the evaporation amount and pressure fluctuation was explored.The numerical simulation results indicate that the angle of the distribution disc affects the distribution of flue gas in the liquid.Moreover,the pressure fluctuation at the inlet of the submerged tube can be reduced by increasing the distribution disc’s angle,thereby increasing backpressure stability in the burner.Conversely,the heat exchange effect between gas and liquid can be enhanced by decreasing the distribution disc’s angle,thereby enhancing evaporation efficiency.
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