摘要
针对高炉煤气粉尘易沉积于管道三偏心蝶阀阀座密封面底部而造成阀板卡塞与损坏,影响高炉生产并造成严重经济损失,为抑制粉尘沉积,设计了粉尘自动清除装置,并对其除尘效果进行了模拟分析。基于ANSYS Workbench软件的FLUENT模块,采用标准湍流模型和DPM模型,模拟了除尘装置工作介质(N_2)的3种入口压力(0.25,0.30和0.35 MPa)对不同阀板开度(45°和90°)蝶阀区域粉尘沉降轨迹的影响,分析了入口压力对粉尘沉降特性的影响规律。结果表明:除阀板开度45°与入口压力0.25 MPa条件组合外,其余5种条件组合下除尘装置均能达到抑制粉尘沉积的效果。其中,阀板开度为45°、入口压力为0.30 MPa条件下以及阀板开度为90°、入口压力为0.25 MPa条件下的除尘效果较好。
Dust of blast furnace gas deposits easily on the bottom of seat sealing surface of the tri-eccentric butterfly valve,which causes serious stuck and damage of the valve plate,thereby affects blast furnace product and brings great economic loss.To reduce the dust deposition,a kind of automatic dust removal system is designed and its efficacy is simulated.Based on FLUENT module of ANSYS Workbench,as well as standard k-εturbulence model and DPM model,simulation analysis of the influence of 3inlet pressures(0.25,0.30,0.35)of working medium(N_2)in dust removal system and 2different valve plate jaw openings(45°,90°)on the dust deposition trajectory in butterfly valve region are conducted,and the influence mechanism of inlet pressure on the dust deposition is analyzed.The results show that the dust removal system can reduce the dust deposition under five combined conditions except under the condition of a valve plate jaw opening of 45°and an inlet pressure of 0.25 MPa.The dust removal system has much better effect under the following conditions:valve plate jaw opening of 45°and inlet pressure of 0.30 MPa,or valve plate jaw opening of 90°and inlet pressure of 0.25 MPa.
出处
《河北科技大学学报》
CAS
2016年第4期369-376,共8页
Journal of Hebei University of Science and Technology
基金
河北省高等学校科学技术研究青年基金(Q2012073)
关键词
计算机仿真
工作介质压力
阀板开度
粉尘沉降特性
三偏心蝶阀
computer simulation
working medium pressure
valve plate jaw opening
dust deposition characteristics
tri-eccentric butterfly valve
