Abstract：In order to study the stirring effects of a single side agitator in the large biogas digester with a diameter and height of 16 m, the fluid dynamics software Fluent was used to conduct the three-dimensional simulation of the stirred flow field with the multiple reference system, RNG κ-ε turbulence model and pressure velocity coupled SIMPLEC algorithm. The influence of different installation angles, bottom height, stirring speed and stirring diameter on the stirring power, the percentage of effective area and the anti-precipitation effects were analyzed. The results showed that when the stirring speed was greater than 450 r/min and the stirring diameter was more than 750 mm, the effective area percentage reached the maximum value of 70%. When the horizontal angle was 30 °, the stirring effect appeared to be the best. When the vertical angle was inclined to the bottom of the biogas digester and the height from the bottom was less than 8 m, it was conducive to prevent the precipitation on the bottom of the biogas digester.
Liang Jingfu,Huang Zhenfeng,Li Xinxin. Numerical Simulation of Side Inlet Mixing Flow Field in Large Scale Biogas Tank[J]. 化学反应工程与工艺, 2017, 33(1): 82-89.
