摘要
罐式炉内石油焦下降运动行为对石油焦煅烧质量起着至关重要的作用。基于计算流体力学方法,建立了罐式炉排料过程的石油焦颗粒运动黏性流数学模型,并通过等比例缩小(1/15)的罐式炉冷态实验验证了模型的可靠性;利用该模型研究了罐式炉内石油焦下降运动行为。结果表明:随着排料运动的进行,示踪料层由直线型转变为"U"字型,石油焦在料罐区域基本符合活塞平推流运动特征,在冷却水套区域呈现漏斗流的特征;黏性流模型模拟结果与冷态物理实验结果比较吻合,表明黏性流模型可有效描述罐式煅烧炉内石油焦下降运动过程。
The discharging behavior of petroleum coke in vertical shaft calciner(VSC)plays an important role in the quality of calcined petroleum coke.Based on computational fluid dynamics,a viscous flow mathematical model for the discharging behavior of petroleum coke in the VSC was established,and the reliability of model was verified by 1/15-scale cold physical model experiment.Using this model,both the movement pattern and velocity field of petroleum coke particles in the pot were investigated.Results show that with the discharging movement,the trace of tracer particles changes from straight type to"U"type,petroleum coke flow in the pot zone basically accords with the plug flow,and it presents a funnel flow in the cooling jacket zone.Moreover,the simulation results show very good agreement with the experimental results,indicating that the viscous flow model can effectively describe the descending behavior of petroleum coke in VSC.
作者
黄金堤
李静
肖劲
李明周
严康
Huang Jin-di;Li Jing;Xiao Jin;Li Ming-zhou;Yan Kang(School of Energy and Mechanical Engineering,Jiangxi University of Science and Technology,Jiangxi Nanchang 330013,China;School of Metallurgy and Environment,Central South University,Hunan Changsha 410083,China;School of Metallurgical and Chemical Engineering,Jiangxi University of Science and Technology,Jiangxi Ganzhou 341000,China)
出处
《炭素技术》
CAS
北大核心
2018年第1期41-45,共5页
Carbon Techniques
基金
国家自然科学基金资助项目(51374253)
江西省教育厅科技研究项目(GJJ170527
GJJ170507)
关键词
石油焦
罐式炉
黏性流模型
冷态物理模型
Petroleum coke
vertical shaft calciner
viscous flow model
cold physical model
