【摘要】：為了研究直徑和高度均為16 m的大型沼氣池Qg單個(gè)側(cè)進(jìn)式攪拌器的攪拌效果,采用流體力學(xué)軟件Fluent,以多重參考系法、RNGκ-ε湍流模型及壓力-速度耦合SIMPLEC算法,對(duì)攪拌流場進(jìn)行三維數(shù)值模擬,并分析了不同的安裝角度、離底高度、攪拌轉(zhuǎn)速及攪拌槳葉直徑對(duì)攪拌功率、有效區(qū)百分比和防沉淀效果的影響。研究結(jié)果表明,當(dāng)攪拌轉(zhuǎn)速大于450 r/min和攪拌槳葉直徑大于750 mm時(shí),有效區(qū)百分比均達(dá)到最大值70%;當(dāng)水平夾角α為30°時(shí),攪拌效果達(dá)到最好;垂直夾角β偏向池底和離底高度小于8 m時(shí),有利于防止池底沉淀的產(chǎn)生。
[Abstract]:In order to study the agitation effect of a large biogas digester with a diameter and a height of 16 m, a single side-feed agitator (Qg) with a diameter and a height of 16 m, the hydrodynamic software Fluent, was used in the multi-reference system method, the RNG 魏-蔚 turbulence model and the pressure-velocity coupled SIMPLEC algorithm. Three-dimensional numerical simulation of stirred flow field was carried out, and the effects of different installation angles, bottom height, stirring speed and impeller blade diameter on stirring power, effective zone percentage and anti-sedimentation effect were analyzed. The results show that when the stirring speed is more than 450 r/min and the agitating blade diameter is more than 750 mm, the percentage of the effective zone reaches the maximum value 70, and when the horizontal angle 偽 is 30 擄, the stirring effect is the best. When the vertical angle 尾 is inclined to the bottom of the pool and the height from the bottom is less than 8 m, it is beneficial to prevent the sedimentation of the bottom of the pool.
【作者單位】： 廣西大學(xué)機(jī)械工程學(xué)院;
【基金】：廣西大學(xué)橫向課題(BB30100005)
【分類號(hào)】：TQ051.72;S216.4

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