Experimental study on temperature distribution of membrane water wall in an ultra-supercritical pressure once-through boiler burning zhundong coal

International Symposium on Resource Exploration and Environmental Science

地球科学;生态环境科学

He, Honghao^1 ; Li, Wenjun^1 ; Zeng, Jun^1 ; Xie, Guohong^1 ; Peng, Min^1 ; Duan, Xuenong^1

State Grid Hunan Electric Power Corporation Research Institute, Changsha, China^1

关键词: Membrane water wall;    Once-through boilers;    Super-critical pressures;    Temperature deviation;    Temperature uniformity;    Working fluid;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/64/1/012092/pdf
DOI  :  10.1088/1755-1315/64/1/012092

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Taking an ultra-supercritical pressure once-through boiler as an example, the temperature distribution of the lower membrane water wall is investigated experimentally, the conclusion reveals that increasing the proportion of Zhundong coal can effectively reduce the district heat load, which benefits the temperature uniformity in the lower membrane water wall. When the boiler being operated at middle load, the temperature deviation in lower membrane water wall increase simultaneously, one of the reasons is that the restriction orifice could not adjust the flow rate of working fluid as expected. By adjusting boiler performance, the temperature uniformity of lower membrane water wall can be improved to a certain degree.