顆粒粉塵在水平管道內(nèi)運(yùn)移的三維數(shù)值模擬
發(fā)布時(shí)間：2018-10-09 13:22
【摘要】：礦山粉塵治理需通過選擇合理的除塵方法,才能達(dá)到較好的降塵效果;目前,帶有長(zhǎng)管道的機(jī)械通風(fēng)除塵措施是礦山粉塵治理的有效措施之一。隨著粉塵在管道內(nèi)長(zhǎng)時(shí)間排出,管道內(nèi)勢(shì)必會(huì)產(chǎn)生沉積現(xiàn)象。應(yīng)用計(jì)算流體力學(xué)軟件FLUENT 6.3.26對(duì)不同粒徑的二氧化硅粉塵顆粒在水平通風(fēng)管道內(nèi)的沉積規(guī)律進(jìn)行模擬計(jì)算,其中通風(fēng)管道管徑D=500mm,長(zhǎng)度l=20 m,送風(fēng)速度v=12 m·s~(-1)。模擬結(jié)果表明:微顆粒(100μm)在管道內(nèi)停留時(shí)間較短,最長(zhǎng)時(shí)間為3.91 s,受湍流影響較大,沉降現(xiàn)象不明顯,運(yùn)移規(guī)律呈無序狀;粗顆粒(5~10 mm)在管道內(nèi)停留時(shí)間相比微顆粒粉塵,停留時(shí)間較短,最長(zhǎng)時(shí)間為1.71 s,受湍流影響較小,沉降現(xiàn)象明顯,運(yùn)移規(guī)律呈波浪狀循環(huán)上升降落,波峰高度隨管程增大而逐漸降低。
[Abstract]:In order to achieve better dust control effect, mine dust treatment needs to select reasonable dust removal methods. At present, mechanical ventilation and dust removal with long ducts is one of the effective measures for mine dust control. As the dust is discharged in the pipeline for a long time, the deposition is bound to occur in the pipeline. The deposition law of silica dust particles with different diameters in horizontal ventilation ducts was simulated by computational fluid dynamics software FLUENT 6.3.26, in which the diameter of ventilation ducts was 500mm, the length of ventilation ducts was 20 mm, and the velocity of air supply was 12 m s ~ (-1). The simulation results show that the residence time of microparticles (100 渭 m) in the pipeline is shorter, the longest time is 3.91 s, the effect of turbulence is greater, the sedimentation phenomenon is not obvious, and the migration law is disordered, and the residence time of coarse particles (510 mm) in the pipeline is higher than that of micro-particle dust. The residence time is short, the longest time is 1.71 s, the effect of turbulence is less, the phenomenon of settlement is obvious, the migration law is wave cycle rising and falling, and the height of wave peak decreases gradually with the increase of pipe length.
【作者單位】： 江西理工大學(xué)資源與環(huán)境工程學(xué)院;江西省礦業(yè)工程重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(50964003)
【分類號(hào)】：TD714
本文編號(hào)：2259490
[Abstract]:In order to achieve better dust control effect, mine dust treatment needs to select reasonable dust removal methods. At present, mechanical ventilation and dust removal with long ducts is one of the effective measures for mine dust control. As the dust is discharged in the pipeline for a long time, the deposition is bound to occur in the pipeline. The deposition law of silica dust particles with different diameters in horizontal ventilation ducts was simulated by computational fluid dynamics software FLUENT 6.3.26, in which the diameter of ventilation ducts was 500mm, the length of ventilation ducts was 20 mm, and the velocity of air supply was 12 m s ~ (-1). The simulation results show that the residence time of microparticles (100 渭 m) in the pipeline is shorter, the longest time is 3.91 s, the effect of turbulence is greater, the sedimentation phenomenon is not obvious, and the migration law is disordered, and the residence time of coarse particles (510 mm) in the pipeline is higher than that of micro-particle dust. The residence time is short, the longest time is 1.71 s, the effect of turbulence is less, the phenomenon of settlement is obvious, the migration law is wave cycle rising and falling, and the height of wave peak decreases gradually with the increase of pipe length.
【作者單位】： 江西理工大學(xué)資源與環(huán)境工程學(xué)院;江西省礦業(yè)工程重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(50964003)
【分類號(hào)】：TD714
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1 葉堅(jiān);夏建新;Malczewska Beata;;水平管道水力輸送粗粒物料的阻力損失研究[J];金屬礦山;2011年07期
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