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J ourna l o f Chemi cal In dust ry an d E ngi neer in g, 1998, 49:28-38

不同入口结构下行床内气固流动及混合行为的CFD-DEM模拟

化工学报, no. 06 (2007): 61-68

Cited by: 5|Views10
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Abstract

采用计算流体力学和离散单元模型(CFD-DEM)耦合一种简单的气固催化反应模型,对具有不同入口结构的二维下行床内的气粒流动和混合行为进行全床数值模拟。模拟得到了不同入口结构下行床内的多尺度气固运动状态、全床的颗粒含率、速度及反应生成物浓度分布,以及气体和颗粒在下行床内的停留时间分布,发现入口结构对反应器内的流动、混合和气固接触效率起着关键性的作用,入口气体和颗粒的不均匀分布将导致下行床内气体停留时间的宽分布以及气固接触效果的恶劣。

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ENCFD-DEM simulation of flow and mixing behavior in downers with different entrance structures
Introduction
  • Foundati on it em :su pport ed by th e N at ional N atu ral S cience. Foundati on of Chin a ( 20306012) , t he Fou ndation for th e Au t hor of.
  • Foundati on of Chin a ( 20306012) , t he Fou ndation for th e Au t hor of
  • CF D-DEM 耦合方 法[ 10] 结合 简单气固 催化反应 模
Highlights
  • Foundati on it em :su pport ed by th e N at ional N atu ral S cience
  • J ourna l o f Chemi cal In dust ry an d E ngi neer in g ( Chi na) ( 化工学报), 1998, 49 ( 1)
  • Q ian Zhen ( 钱 震), Zhan g M in ghui ( 张 明 辉), Y u Hao ( 余 皓), W ei Fei ( 魏 飞), J in Yong ( 金 涌 ) .Dow ner en t rance st ruct ure based on st rong t urbul ence dis persi on
Results
  • 对于模拟流化床这样的复杂气固流态化系统, 采用 离散单元方法 ( DEM ) 和计算流体力学
  • Den sit y/ kg · m -3 coeff icient of rest it ut ion
  • 0.00001 simu lation param et er numb er of parti cles about 53000
  • 5 ×10 -5 t otal simu lation t ime/ s gas i nlet veloci ty/ m · s -1
  • -1 ( 为组分 B, 气速为 1 m · s ) 通过设置在中央的
  • Entr ance structures in ca ses 1, 2 and 3
  • Flow structure below do wner entr ance of th ree cases ( H =0 — 0.6 m)
  • J ourna l o f Chemi cal In dust ry an d E ngi neer in g ( Chi na) ( 化工学报) , 1998, 49 ( 1) :28-38
  • Q ian Zhen ( 钱 震) , Zhan g M in ghui ( 张 明 辉) , Y u Hao ( 余 皓) , W ei Fei ( 魏 飞) , J in Yong ( 金 涌 ) .Dow ner en t rance st ruct ure based on st rong t urbul ence dis persi on.
Conclusion
  • Jour nal o f Chemica l Indu str y and E ngi neer ing ( Chi na )
  • John st on P M , de Las a H I, Zhu J X.A xial f low s t ruct ure ui , u j ——— 气体速度, m · s -1 in t he en t rance regi on of a dow ner flui di zed b ed :eff ect s of x i , x j ——— 坐标, m t he dis t rib ut or desi gn.
  • Chemica l Eng ineeri ng S cience, 1999, 54 :2161-2173 α——— 组分的体积分数
Tables
  • Table1: Parameters used in simulation
Download tables as Excel
Study subjects and analysis
cases: 3
图 8 t =2.5 s 时 3 种 工况下组分 B 的体积分数分布. Co ntours of v olume fr action of species B of three cases a t simulatio n time t =2.5s. 的范围内, 生成物浓度差达到最大值 。 在 H =2 m

Reference
  • Engi neer in g ( China) ( 化工学报), 2007, 58 ( 1):44-53
    Google ScholarFindings
  • f luidiz ed bed. Pow d er Techno log y, 1994, 81:25-30
    Google ScholarLocate open access versionFindings
  • N umer ica l Heat Tr ans f er, 1984, 7:147-163
    Google ScholarFindings
  • Eng ineeri ng, 1995, 73:662-677 dow ner. Jour na l
    Google ScholarFindings
  • Washi ngt on D C:H emi sphere, 1980 dow nf low circu lat ing f luidized b ed ( dow ner ) reactors —a
    Google ScholarLocate open access versionFindings
  • Engi neering Fou ndation, 1989:25-32 of lateral and axial solids in a cocurrent down flow ci rculat ing
    Google ScholarFindings
  • Cundall P A, S t rack O D L.A di screte nu merical model f or granular as semb lies.Geot echn ique, 1979, 29:47-65
    Google ScholarLocate open access versionFindings
  • Science, 1999, 54:2123-2130 ( 汪展文), Yu Zhiqing ( 俞芷青).Fluidizat ion Engineeri ng
    Google ScholarFindings
  • Universit y Press, 2001 ou tlet conf igu rat ions of gas-solids cocurrent downf low react ors. The Chinese J ourna l o f Pr ocess Eng ineerin g ( 过
    Google ScholarLocate open access versionFindings
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