基于CFD数值模拟的炉排型垃圾焚烧炉防结渣结构优化  

Optimization of Deposition Prevention Structure of a Grate Type Municipal Solid Waste Incinerator Based on CFD Numerical Simulation

作　　者：朱燕群[1] 王俊杰 许岩韦 徐超群[1] 何勇[1] 王智化[1] ZHU Yanqun;WANG Junjie;XU Yanwei;XU Chaoqun;HE Yong;WANG Zhihua(State Key Laboratory of Clean Energy Utilization,Qingshanhu Energy Research Center,Zhejiang University,Hangzhou 310027,China;Three Gorges Group Sichuan Energy Investment Co.,Ltd.,Chengdu 610095,China;Everbright Envirotech(China)Limited,Nanjing 210007,China)

机构地区：[1]浙江大学青山湖能源研究基地,能源清洁利用国家重点实验室,杭州310027 [2]三峡集团四川能源投资有限公司,成都610095 [3]光大环境科技(中国)有限公司,南京210007

出　　处：《动力工程学报》2023年第4期483-490,共8页Journal of Chinese Society of Power Engineering

基　　金：中国高等教育学会2022年度高等教育科学研究规划课题(22WL0307);教育部产学合作协同育人资助项目(220606707011813);浙江省教育厅2022年省级课程思政教学研究项目(浙教办函【2022】51号)。

摘　　要：为解决垃圾焚烧炉后拱区域积灰结渣的问题,以某300 t/d炉排式垃圾焚烧炉为研究对象,制定了3种方案对炉型结构进行优化。采用数值模拟的方法对炉内燃烧过程进行热态模拟,采用高温转子黏度计测量渣样的黏温特性,进而分析垃圾焚烧炉的积灰结渣特性。基于灰颗粒沉积模型对比不同方案下飞灰颗粒与壁面的撞击、黏附行为。结果表明:方案C是最优的炉型结构;相比方案A,方案C炉内流场均匀性大幅提升,后拱区域温度过高的现象消失;飞灰颗粒与后拱壁面的碰撞频率最低,较方案A下降了6.88%;方案C下飞灰颗粒的黏附概率最低,在1425~1433 K温度范围内粒子黏附在壁面上的概率约为13.5%,这部分飞灰颗粒占比仅0.08%。To solve the problem of ash deposition in the rear arch area of the waste incinerator,three transformation cases for a 300 t/d grate waste incinerator were employed to optimize the furnace structure.Thermal simulation was carried out on the combustion process in the furnace,the viscosity-temperature characteristics of the ash deposition sample were measured by a high-temperature viscometer.Based on the ash particle deposition model,the impact and adhesion behavior of ash particles were quantitatively observed.Results show that case C is the optimal one.Compared with the original furnace,the uniformity of the flow field of case C is enhanced greatly,and the high-temperature phenomenon in the rear arch area is disappeared.Among the three cases,the collision frequency of ash particles within the back arch for case C is the lowest one,which was 6.88%lower than the original furnace.Furthermore,the adhesion ratio of ash particles is the lowest one under case C,and only 0.08%of the ash particles adhere to the wall with a probability of 13.5%at the temperature of 1425-1433 K.

关 键 词：垃圾焚烧炉 灰渣沉积 黏温特性 计算流体动力学 数值模拟 

分 类 号：TK16[动力工程及工程热物理—热能工程]