【摘要】 高炉煤气含大量粉尘,易在管道内三偏心蝶阀阀座密封面底部板结,影响阀板转动或损坏密封面,影响高炉生产并造成经济损失.为阻止粉尘在蝶阀阀座密封面底部板结,采用Pro/E设计了蝶阀区域的粉尘自动清除装置.基于ANSYS Workbench的FLUENT模块,选择标准k-ε模型和DPM模型,对不同阀板开度(15°,30°,45°,60°,75°和90°)时蝶阀区域粉尘沉降轨迹进行了仿真模拟,分析了除尘装置对粉尘沉降特性的影响规律.结果显示:阀板开度30°,45°,60°,75°和90°时,除尘装置均能使三偏心蝶阀阀座密封面底部粉尘板结质量显著降低;阀板开度90°时板结粉尘清除率可高达80.7%;而阀板开度15°时,除尘装置未体现明显除尘效果.更多还原

【Abstract】 Due that the blast furnace gas in the pipeline contains a large amount of dusts,the seat sealing bottom of tri-eccentric butterfly valve is easily deposited and hardened.By producing stuck or sealing surface damage of valve plate,the blast furnace product is impacted on economic loss.To stop the dust deposition,a specific automatic dust removal system is designed via Pro/ETM.Based on the FLUENTTM module of ANSYSTM Workbench,along with standard and DPM models,the simulations on dust deposition tracks in the butterfly valve region under different valve plate jaw openings,such as 15°,30°,45°,60°,75°and 90°,are conducted.Meanwhile,the influence mechanism of dust removal system on dust deposition properties is analyzed.Therefore,it is indicated that the dust removal system reduces the dust deposition on the seat sealing bottom of tri-eccentric butterfly valve,excluding the valve plate jaw opening of 15°,whereas a better efficacy can be obtained with a dust removal rate of 80.7% under the valve plate jaw opening of 90°.更多还原