垃圾焚烧旋转喷雾干燥净化模型研究  

Flue Gas Purification Model of a Waste Incinerator with Rotating Spray

作　　者：贾振南 李春曦[1] 尹水娥[3] 叶学民[1] JIA Zhennan1,2 , LI Chunxi1, YIN Shui＇e3, YE Xuemin1(1. MOE＇s Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, North China Electric Power University, Baoding 071003, Hebei Province, China; 2. Fengfan Co. , Ltd. , Baoding 071057, Hebei Province, China; 3. China Urban Construction Design Research Institute, Beijing 100120, Chin)

机构地区：[1]华北电力大学电站设备状态监测与控制教育部重点实验室,河北保定071003 [2]风帆有限责任公司,河北保定071057 [3]中国城市建设研究院,北京100120

出　　处：《动力工程学报》2018年第6期484-492,共9页Journal of Chinese Society of Power Engineering

基　　金："十二五"国家科技支撑计划资助项目(2014BAC12B00)

摘　　要：以垃圾焚烧厂脱酸塔为模拟对象,建立了脱酸塔气固液之间的传质模型及化学反应模型,对旋转产生的喷雾建立了浆滴模型以分析其蒸发和传质过程,通过对已有实验模型与脱酸塔实际运行结果进行对比,验证了所建化学反应模型和浆滴模型的准确性,模拟了某垃圾焚烧厂脱酸塔的内流特征,得到其压力、温度、速度和酸性气体质量分数等参数的分布及脱除率。结果表明:脱酸塔中轴线上部是脱酸反应主要发生部位;由于烟气回流区的作用,部分没有蒸发完全的浆滴被吹向脱酸塔壁面,容易造成脱酸塔壁面的结渣和腐蚀,导致脱酸塔壁面所受的热应力增大,不利于脱酸塔长期稳定运行;浆滴进入脱酸塔5s内完全蒸发。A gas-solid-liquid mass transfer model,a chemical reaction model and a slurry droplet model were set up for the deacidification tower with rotating spray in a waste incineration plant to analyze the evaporation and mass transfer processes.The accuracy and reliability of above models were verified by comparing the experimental results with actual operating data.Based on simulation of the internal dynamics in deacidification tower of a certain waste incineration plant,the deacidification efficiency as well as the distributions of pressure,temperature,velocity and acid gas concentration were obtained.Results show that the deacidification reaction mainly occurs in the upper part of central axis in the deacidification tower;some of the droplets that have not evaporated completely are blown to the tower wall due to the influence of flue gas recirculation,leading to the possible risk of slagging and corrosion as well as the increment of thermal stress of tower wall,which is not conducive to the long-term stable operation of the deacidification tower;the slurry droplets evaporate completely in 5 seconds after entering the deacidification tower.

关 键 词：垃圾焚烧 脱酸塔 烟气脱酸 反应动力学模型 数值模拟 

分 类 号：TK01[动力工程及工程热物理]