高炉煤气流速对蝶阀区域粉尘沉降特性影响

摘要：高炉煤气含有大量粉尘，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或损坏，影响高炉生产并造成严重经济损失。为获取管道内部高炉煤气流速对蝶阀区域粉尘沉降规律的影响机理，使用Pro/E建立了蝶阀及其区域流场的三维模型，基于ANSYS Workbench软件的FLUENT模块，采用标准k-ε湍流模型和DPM模型，对3种高炉煤气流速条件下的蝶阀区域粉尘运动轨迹进行了模拟分析。结果表明：流速为8 m/s工况下，粉尘沉积质量随阀板开度增大而呈现先降后升的趋势，而12 m/s和16 m/s工况下，粉尘沉积质量随阀板开度增大而降低；阀板开度15°工况下，粉尘沉积率随高炉煤气流速增大而升高，而45°和75°工况下，粉尘沉积率随高炉煤气流速增大而降低。研究结果可为高炉煤气管道蝶阀区域粉尘自动清除装置的研制提供理论参考。

关键词：计算机仿真；流场分析；高炉煤气流速；阀板开度；沉降特性；三偏心蝶阀

中图分类号：TP319；TF547.2文献标志码：A

WANG Lixin， WANG Bin， HUANG Fengshan.Influence of blast furnace gas flow speed on dust deposition characteristics in butterfly valve region[J].Journal of Hebei University of Science and Technology，2016，37（1）：58-64.Influence of blast furnace gas flow speed on dust deposition

characteristics in butterfly valve region

WANG Lixin， WANG Bin， HUANG Fengshan

（School of Mechanical Engineering， Hebei University of Science and Technology， Shijiazhuang， Hebei 050018， China）

Abstract：The blast furnace gas contains plenty of dust， which deposits easily on the bottom of seat sealing surface of the tri-eccentric butterfly valve in the pipeline， causing stuck and damage to the valve plate， thereby affects the production of the blast furnace and brings great economic loss. To derive the influence mechanism of effects of the blast furnace gas flow speed within the pipeline on the dust deposition laws in the butterfly valve region， a 3D model of the butterfly valve and its regional flow field is built with Pro/E software. Based on FLUENT module of ANSYS Workbench， along with standard k-ε turbulence model and DPM model， simulation analysis of moving trajectories of dust particles in butterfly valve region under 3 blast furnace gas flow speeds is conducted. Results show that the deposition mass of dust particles decreases firstly， then increases with the enlargement of valve plate opening angle under the blast furnace gas flow speed of 8 m/s， while decreases with the enlargement of valve plate opening under the blast furnace gas flow speeds of 12 m/s and 16 m/s. In the case of the valve plate opening angle of 15°， the deposition rate of dust particles increases with the growing of blast furnace gas flow speed， while decreases with the growing of blast furnace gas flow speed under the cases of valve plate opening angle of 45° and 75°. The research results provide a theoretical reference for the development of automatic dust removal system in the butterfly valve region of the blast furnace gas pipeline.