| 燃煤电厂脱硫废水在烟道中的蒸发及流动特性数值模拟 |
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| 引用本文： | 彭歌亮,谈智玲,左蓓萌,陈全喜,付江涛,杨彬,杨仲卿.燃煤电厂脱硫废水在烟道中的蒸发及流动特性数值模拟[J].重庆大学学报(自然科学版),2018,41(11):59-65. |
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| 作者姓名： | 彭歌亮 谈智玲 左蓓萌 陈全喜 付江涛 杨彬 杨仲卿 |
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| 作者单位： | 湖北华电襄阳发电有限公司, 湖北 襄阳 441000,湖北华电襄阳发电有限公司, 湖北 襄阳 441000,重庆大学 能源与动力工程学院, 重庆 400044,武汉天和技术股份有限公司, 武汉 430077,武汉天和技术股份有限公司, 武汉 430077,重庆大学 能源与动力工程学院, 重庆 400044,重庆大学 能源与动力工程学院, 重庆 400044 |
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| 基金项目： | 国家自然科学基金资助项目（51574185）。 |
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| 摘 要： | 利用燃煤电厂尾部烟道的烟气余热来实现脱硫废水的喷雾蒸发是实现其零排放的有效途径，以国内某燃煤电厂330 MW火力机组的烟道为研究对象，利用DPM模型对雾化液滴群在高温烟道内的蒸发及流动特性进行了研究，考察了不同雾化嘴角情况下液滴碰壁情况、不同负荷下液滴的蒸发情况，研究结果表明：在50%、75%、100%烟气负荷工况下，烟气温度越高、烟气速度越快，雾化液滴群完全蒸发所需时间越少，液滴最大蒸发时间在2.85~3.36 s之间。在单烟道结构的最佳喷嘴雾化锥角为65°情况下，越靠近烟道内侧，涡的尺寸越大，越有利于促进喷嘴区的局部液滴群不断向其他区域扩散。
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| 关 键 词： | 脱硫废水 喷雾蒸发 雾化锥角 数值模拟 |
| 收稿时间： | 2018/6/28 0:00:00 |
Numerical smulation of evaporation and flow characteristics of gas FGD wastewater from a coal-fired power plant |
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| PENG Geliang,TAN Zhiling,ZUO Beimeng,CHEN Quanxi,FU Jiangtao,YANG Bin and YANG Zhongqing.Numerical smulation of evaporation and flow characteristics of gas FGD wastewater from a coal-fired power plant[J].Journal of Chongqing University(Natural Science Edition),2018,41(11):59-65. |
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| Authors: | PENG Geliang TAN Zhiling ZUO Beimeng CHEN Quanxi FU Jiangtao YANG Bin and YANG Zhongqing |
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| Affiliation: | Hubei Huadian Xiangyang Power Generation Co., Ltd., Xiangyang 441004, Hubei, P. R. China,Hubei Huadian Xiangyang Power Generation Co., Ltd., Xiangyang 441004, Hubei, P. R. China,College of Energy and Power Engineering, Chongqing University, Chongqing 400044, P. R. China,Wuhan Tianhe Technology Co., Ltd., Wuhan 430077, P. R. China,Wuhan Tianhe Technology Co., Ltd., Wuhan 430077, P. R. China,College of Energy and Power Engineering, Chongqing University, Chongqing 400044, P. R. China and College of Energy and Power Engineering, Chongqing University, Chongqing 400044, P. R. China |
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| Abstract: | It is an feasible way to realize the zero liquid discharge(ZLD) by using the waste heat from the flue gas of the coal-fired power plant to evaporate the spray of the FGD wastewater. In this paper, the evaporation and flow characteristics of atomized droplets in a high temperature flue of a 330 MW coal-fired power plant were studied by numerical simulation, and the droplet impinging condition at different atomizing mouth angles and the evaporation of droplets under different loads were investigated. The results show that in 50%,75% and 100% boiler load, the higher the temperature and the faster the speed of the flue gas, the less the time it takes for the complete evaporation of the droplets, and the maximum life time of droplet is between 2.85~3.36s. When the optimum atomization cone angle of a single flue structure is 65°, the size of vortex is inversely proportional to the distance between sprayer and the flue wall, which is conducive to the continuous diffusion of the local droplets from the nozzle region to other regions. |
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| Keywords: | FGD wastewater spray dryer evaporation spray cone angle numerical simulation |
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