带钢表面粉尘控制新技术的流场仿真及优化  

Flow simulation and optimization on a new technic used to control dust from cold-rolled strip

作　　者：梅丹[1] 吴高明[2] 陈旺生[1] 杜健敏[2] 彭炜[2] 

机构地区：[1]武汉科技大学矿产资源高效利用与造块湖北重点实验室,武汉430081 [2]武汉钢铁(集团)公司,武汉430000

出　　处：《环境工程学报》2011年第1期171-174,共4页Chinese Journal of Environmental Engineering

基　　金：湖北省教育厅高校产学研合作资助项目(CXY2009A003)

摘　　要：冷轧生产过程中,带钢表面的氧化铁皮由于振动而在车间发生沿程脱落,车间扬尘污染问题严重,影响工人的身体健康和产品的质量。用于带钢氧化铁皮除尘的吹吸式尘源控制技术,利用喷嘴产生的高速射流将带钢上下表面松动的氧化铁皮粉尘清除,使粉尘在源头脱落,并随高速气流运动,经吸气罩排走。基于计算流体力学基本理论,应用CFX计算软件,选择剪切应力传输k-ω湍流模型对此装置进行流场计算,得到喷射气流与钢板传输形成的复合流场形态,以预测粉尘被卷吸和捕集的效果,并进一步优化喷嘴的安装角度。结果表明喷嘴角度为10°左右时,粉尘吹除效果最佳。The pollution of dust is severe,during cold-rolled strip process,as iron oxide scales falling off the cold-rolled strip all around,which affects worker＇s health and the quality of productions.A spurt and suction technique which is used to collect iron oxide scales that fell off the cold-rolled strip surface is invented.The incompact iron oxide scale is removed by high speed airflow spurted from the nozzle at the first time,then drawn by a suction cap.Base on CFD theory and shear stress transport（SST）k-ω mode,numerical simulation software CFX is used to study the compound fluid field formed by jet stream sprayed from the nozzle and strip transmitting air stream.Therefore,effect of dust cleared away and collected can be predicted.Furthermore the optimal nozzle degree can be found.The simulating results at different nozzle degrees shows that the optimal nozzle degree is about 10°.Under these conditions,the compound fluid field can control and collect dusts most effectively.

关 键 词：吹吸气流 SST紊流模型 喷嘴角度 数值模拟 

分 类 号：X513[环境科学与工程—环境工程]