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投稿时间：2022-01-26
投稿时间：2022-01-26
中文摘要: 基于欧拉-拉格朗日方法对煤气化辐射废锅内高温气固两相流动传热传质特性进行了三维数值计算,水冷壁上的灰渣沉积过程采用熔渣沉积反弹模型描述。结果表明:灰渣沉积主要发生在辐射废锅的中下部,射流区流速和温度在距离底部5.5 m处迅速衰减,灰渣厚度和导热热阻在此处迅速增加,对流辐射复合换热系数和传热系数在此处迅速下降;随着入口温度的升高,壁面沉积厚度和导热热阻逐渐升高,对流辐射复合换热系数和传热系数由于温差的影响也逐渐升高;随着操作压力的升高,壁面沉积厚度和导热热阻逐渐下降,对流辐射复合换热系数和传热系数逐渐升高。
Abstract:Based on Euler-Lagrange method,the heat and mass transfer characteristics of high temperature gas-solid two-phase flow in the radiant syngas cooler of coal gasification radiation are numerically calculated in this paper.The slag deposition on water wall surface is described by slag deposition rebound model.The results show that the ash deposition mainly occurs in the middle and lower part of the radiant syngas cooler (RSC),the velocity and temperature of the jet zone decay rapidly at 5.5 m from the bottom,the thickness of ash and thermal-conduction resistance increase rapidly,and the compound heat transfer coefficient of convective radiation and overall heat transfer coefficient decrease rapidly here.With the increase of inlet temperature,the thickness of wall deposition and thermal-conduction resistance increase,and the compound heat transfer coefficient of convective radiation and overall heat transfer coefficient gradually increase due to the influence of temperature difference.With the increase of operating pressure,the thickness of wall deposition and thermal-conduction resistance decrease gradually,while the compound heat transfer coefficient of convective radiation and overall heat transfer coefficient increase gradually.
keywords: radiant syngas cooler ash deposition thermal-conduction resistance heat transfer coefficient overall heat transfer coefficient
文章编号：20224007 中图分类号：TK115 文献标志码：
基金项目:国家重点研发计划(2017YFB0602602);山西省基础研究计划(202102386)。
| 作者 | 单位 | |
| 方英蔓 | 太原理工大学 电气与动力工程学院 | |
| 张嘉杰 | 太原理工大学 电气与动力工程学院 | zhangjiajie@tyut.edu.cn |
| 张建胜 | 清华大学 山西清洁能源研究院 | |
| 马素霞 | 太原理工大学 电气与动力工程学院 |
引用文本：
方英蔓,张嘉杰,张建胜,等.煤气化辐射废锅内高温气固两相流动传热传质数值研究[J].上海电力大学学报,2022,38(4):352-360.
FANG Yingman,ZHANG Jiajie,ZHANG Jiansheng,et al.Numerical Study on Heat and Mass Transfer Characteristics of High Temperature Gas-solid Two-phase Flow Inradiant Syngas Cooler of Coal Gasification[J].Journal of Shanghai University of Electric Power,2022,38(4):352-360.
方英蔓,张嘉杰,张建胜,等.煤气化辐射废锅内高温气固两相流动传热传质数值研究[J].上海电力大学学报,2022,38(4):352-360.
FANG Yingman,ZHANG Jiajie,ZHANG Jiansheng,et al.Numerical Study on Heat and Mass Transfer Characteristics of High Temperature Gas-solid Two-phase Flow Inradiant Syngas Cooler of Coal Gasification[J].Journal of Shanghai University of Electric Power,2022,38(4):352-360.