摘要
为研究1139t/h四角切圆燃烧锅炉炉内气固两相流动问题,采用标准k-ε模型和DPM模型数值研究3种典型负荷下炉内流动特性及固体颗粒运动轨迹.研究结果表明:在不同负荷下四角射流均能形成稳定切圆,但炉内气流偏斜严重易引起水冷壁的结渣;100%负荷下在炉膛壁面产生漩涡,颗粒对水冷壁造成冲刷;炉内合适的煤粉粒径能够保证煤粉在炉内的停留时间.研究结果对锅炉的热态燃烧调整提供理论依据.
To study the flow characteristics in furnace of a 1139 t/h tangentially fired supercritical pressure boiler, this paper carried out numerical simulation under different load with standard k-ε model. The solid pulverized coal particle flow trajectory in the furnace was also numerically simulated with DPM model. The simulation results show that the jets of four comer burners can form a stable tangential under the different load. The flue gas deflects seriously in furnace that leads to slag of water wall. The eddy appears on the wall under 100% load, and the particles erode furnace wall. The particle residence time in furnace is related to the particle size. The results of the study provide theoretical basis for the adjustment of boiler combustion.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2015年第9期1070-1073,共4页
Journal of Liaoning Technical University (Natural Science)
关键词
四角切圆锅炉
典型负荷
炉内流场
固体颗粒
颗粒轨迹
停留时间
comer tangential boiler
typical load
flow field
solid particle
particle trajectory
residence time
作者简介
王为术（1972-），男，重庆开县人，博士，教授，主要从事多相传热与流动方面的研究．
