Position: Home > Articles > 3-D Static Simulation of the Effect of Upward Flow Velocity on Separation Efficiency of Three-phase Separator in UASB Reactor
Transactions of the Chinese Society for Agricultural Machinery
2012,43
(1)
101-107
上升流速对三相分离器分离效果影响的三维稳态模拟
作 者：
郝飞麟;沈明卫
单 位：
浙江大学生物系统工程与食品科学学院;浙江树人大学生物与环境工程学院
关键词：
厌氧发应器;三相分离器;上升流速;多相流;三维模拟;计算流体力学
摘 要：
以Eulerian多相流模型为理论框架,利用计算流体力学(CFD)技术对厌氧反应三相分离器中USAB反应器在不同设计流速下的固、液、气三相三维流场以及分离效率进行模拟分析,模拟中采用的5种设计上升流速分别为:0.50、0.75、1.00、1.25、1.50 m/h。模拟结果表明:设计上升流速对反应器内部流动的影响明显,实际的液相平均流速约为设计上升流速的3倍左右,气相的平均流速比液相的高约10%;固相平均速度比设计上升流速低,约为其1/2弱,固相的最大垂直上向流速与设计上升流速完全一致。低的设计上升流速下的固、气分离率略高于高的上升流速情况,分离率差别小于2%。实际工程试验表明,理论模拟值与实测值相对误差在8%以内。
译 名：
3-D Static Simulation of the Effect of Upward Flow Velocity on Separation Efficiency of Three-phase Separator in UASB Reactor
作 者：
Hao Feilin1 Shen Mingwei2 (1.College of Biology and Environmental Engineering,Zhejiang Shuren University,Hangzhou 310015,China 2.College of Biosystems Engineering and Food Science,Zhejiang University,Hangzhou 310058,China)
关键词：
UASB,Three-phase separator,Upward flow velocity,Multi-phase flow,3-D simulation,CFD
摘 要：
With the aim to evaluate the appropriate upward flow velocity in UASB reactor,the separation efficiency of solid,liquid,gas in three-phase separator(TS) of USAB reactor was simulated via CFD technology based on Eulerian multi-phase model.Five upward flow velocities(UFV) as 0.50,0.75,1.00,1.25,1.50 m/h were adopted in simulation for a typical UASB reactor.The result showed that the UFV had an obvious effect on the flow pattern inside the TS,the average velocity of liquid in the whole UASB reactor was around 3 times of the designed UFV,the average velocity of gas was 10% higher than that of the liquid,the average velocity of solid was lower and about half of the designed UFV,and the maximal solid UFV was in the same level with the UFV.The separation efficiency of solid and gas was higher in low UFV than that in the higher situation,while the difference was less than 2%.Site experiment showed a good agreement between the simulated data and measured one with a relative error within 8%.
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