摘要
卧式喷淋塔技术是北京科技大学环境中心开发的一种新型烟气脱硫系统工艺,在某些方面克服了立式喷淋塔的缺点,具有脱硫效率高、压力损失小、运行成本低、易检修等特点.但在实际工程中仍然需要进一步的改进.为了研究不同喷淋的布置格局对卧式喷淋塔的内部流场的影响,构建了卧式喷淋塔物理模型,采用Icem软件划分网格,利用Fluent软件数值模拟计算.模拟中选择k-ε湍流模型及随机轨道模型,数值模拟计算采用SIMPLE算法.模拟结果表明:双层喷淋设置时喷雾锥角为90°,上部喷淋高度为距顶部0.9 m,下部喷淋高度为距顶部2.4 m,喷淋层间距为1.5 m时,有效的减少脱硫塔压力损失,降低能耗,塔内吸收区烟气流动的速度均匀,增大了气液接触的频率.烟气的温度适宜于气液反应.总体上提高了烟气的脱硫效率,为实际工程的设计和应用提供指导.
Horizontal spray tower technology is a new flue gas desulfurization system technology that was developed at the University of Science and Technology Beijing,Center for the Environment,overcoming the shortcomings of the vertical spray tower with regard to high desulfurization efficiency,small pressure loss,low operation cost,and easy maintenance,among others.However,the actual project still requires further improvement.In order to study the influence of the layout pattern of different spray on the internal flow field of the horizontal spray tower,the physical model of the horizontal spray tower was built,the grid was divided by Icem software,the Fluent software was used to simulate the numerical simulation.K-epsilon turbulence and stochastic models were selected for numerical simulation.The simulation results,obtained by the SIMPLE algorithm,show that the double spray sets the spray cone angle at 90°,the upper spray height is at 0.9 m from the top,the lower part of the spraying height is at 2.4 m from the top layer,the spray distance is 1.5 m,the desulfurization tower effectively reduces the pressure loss and energy consumption,the absorption area of the flue gas flow rate is uniform,and the gas-liquid contact frequency increases.The gas temperature is suitable for a gas-liquid reaction.The overall increase in the efficiency of flue gas desulphurization provides guidance for the design of practical engineering applications.
出处
《工程科学学报》
EI
CSCD
北大核心
2018年第1期17-22,共6页
Chinese Journal of Engineering
基金
北京市科技计划首都蓝天行动资助项目(D15110004915003)
中央高校基本科研业务费专项资金资助项目(FRE--TP--15-051A1)
关键词
湿法脱硫
卧式喷淋塔
烧结烟气
数值模拟
Fluent软件
wet desulfurization
horizontal spray tower
sintering flue gas
numerical simulation
Fluent software