【摘要】：以Fluent中的歐拉三相流模型為基礎(chǔ),采用改進的曳力模型對連續(xù)式三相氣升式內(nèi)環(huán)流生物反應器進行二維非穩(wěn)態(tài)數(shù)值模擬,模擬反應器降流區(qū)時均液體循環(huán)速度和最大液體循環(huán)速度,不同曝氣量和石英砂含量下的氣含率及曝氣量10.2 L/min、石英砂含量2 L時苯酚在反應器內(nèi)的擴散過程.結(jié)果表明,模擬結(jié)果與實測值吻合較好.用該模型模擬固相密度為1200,1500,1 800,2 220 kg/m~3、固相顆粒粒徑為0.3,0.6,0.9 mm條件下降流區(qū)的時均液體循環(huán)速度,較小的密度和粒徑有助于提高液體循環(huán)速度.
[Abstract]:Based on the Euler three-phase flow model in Fluent, an improved drag model is used to simulate the two-dimensional unsteady state of the continuous three-phase airlift internal circulation bioreactor. The average liquid circulation velocity and maximum liquid circulation velocity, the gas holdup and aeration rate of 10.2 L / min at different aeration rate and quartz sand content, and the diffusion process of phenol in the reactor with 2 L quartz sand content were simulated. The results show that the simulation results are in good agreement with the measured values. The model was used to simulate the time-averaged liquid circulation velocity in the descending flow region with solid density of 1 200 ~ 1 500 ~ 1 800 ~ 2 220 kg/m~3, and the particle size of 0. 3 ~ 0. 6 ~ 0. 9 mm. A small density and particle size are helpful to increase the liquid circulation velocity.
【作者單位】： 湖南大學土木工程學院;中國地質(zhì)工程集團公司;
【基金】：國家水體污染控制與治理科技重大專項(編號:2009ZX07423-004)
【分類號】：TQ052.5
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本文編號：2370338