【摘要】：以Fluent中的歐拉三相流模型為基礎(chǔ),采用改進(jìn)的曳力模型對(duì)連續(xù)式三相氣升式內(nèi)環(huán)流生物反應(yīng)器進(jìn)行二維非穩(wěn)態(tài)數(shù)值模擬,模擬反應(yīng)器降流區(qū)時(shí)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(shí)苯酚在反應(yīng)器內(nèi)的擴(kuò)散過程.結(jié)果表明,模擬結(jié)果與實(shí)測(cè)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(shí)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(xué)土木工程學(xué)院;中國(guó)地質(zhì)工程集團(tuán)公司;
【基金】：國(guó)家水體污染控制與治理科技重大專項(xiàng)(編號(hào):2009ZX07423-004)
【分類號(hào)】：TQ052.5
，

本文編號(hào)：2370338