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J4  2011, Vol. 45 Issue (5): 878-884    DOI: 10.3785/j.issn.1008-973X.2011.05.017
能源工程     
液滴在高温气流中蒸发混合特性计算分析
王海涛,杨卫娟,周俊虎,王智化,刘建忠,岑可法
浙江大学 能源清洁利用国家重点实验室,浙江 杭州 310027
Calculation and analysis on evaporation and mixing characteristics
of droplets in high temperature flue
WANG Hai-tao, YANG Wei-juan, ZHOU Jun-hu, WANG Zhi-hua,
LIU Jian-zhong, CEN Ke-fa
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027 , China
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摘要:

针对选择性非催化还原(SNCR)过程中还原剂溶液在炉内的蒸发扩散问题,运用Fluent计算软件模拟液滴在高温气流中蒸发扩散过程.研究涉及到主要参数包括气流流速、气流温度、液滴喷射速度、液滴喷射量以及液滴雾化粒径因素,分析它们对液滴蒸发和扩散规律的影响.以液滴蒸发时间、距离﹑有效区域体积、投影面积为衡量指标,得到液滴蒸发规律.研究表明,气流温度、气流流速和液滴喷射速度的增大都可以加速液滴蒸发,其中气流温度的影响最大,液滴喷射速度次之,气流流速最小.液滴喷射量和液滴雾化粒径的增大都可以使蒸发时间延长.除气流流速外,其他4种变量增大都会使研究区域内混合状况变好.

Abstract:

Focusing on the evaporation and diffusion of reductant solution in the furnace in the selective non-catalytic reduction(SNCR) process,the evaporation and diffusion processes of the liquid droplets in high temperature were simulated by Fluent software. The main factors including flow velocity, flow temperature, droplets velocity, the injecting rate of liquid droplets flow rate and droplets size were concerned and their effects on droplets evaporation and diffusion were analyzed. Some results of evaporation were achieved by taking droplets' evaporation time and distance, volume and projected area of effective area as evaluating indicators. The results show that the increase of flue temperature, flue velocity and droplets velocity accelerates droplets' evaporation. Among them, flue temperature has the greatest impact on the evaporation, followed by droplets velocity, then flue velocity. The increase of the injecting rate of liquid droplets and droplets size prolongs the evaporation process. Except flue velocity, the increase of the other four variables enhances the mixing status in the researched range.

出版日期: 2011-11-24
:  X 511  
通讯作者: 杨卫娟,女,副教授,     E-mail: yangwj@zju.edu.cn
作者简介: 王海涛(1985-),男,山东德州人,硕士生,从事垃圾电站的SNCR研究.E-mail: htwang@zju.edu.cn
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引用本文:

王海涛,杨卫娟,周俊虎,王智化,刘建忠,岑可法. 液滴在高温气流中蒸发混合特性计算分析[J]. J4, 2011, 45(5): 878-884.

WANG Hai-tao, YANG Wei-juan, ZHOU Jun-hu, WANG Zhi-hua, LIU Jian-zhong,CEN Ke-fa. Calculation and analysis on evaporation and mixing characteristics
of droplets in high temperature flue. J4, 2011, 45(5): 878-884.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2011.05.017        https://www.zjujournals.com/eng/CN/Y2011/V45/I5/878


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