旋流诱导界面(SII)反应器流动优化与泥/水分离性能研究

Investigation of sludge-water separation characteristics and flow optimization on Spiral Induced Interface(SII) reactor

提出了一种新型诱导界面反应器(SII),通过优化反应器内的旋流流动,有效降低了活性污泥颗粒与水相的分离因子,改善了污泥床反应器内的泥/水两相接触状况,提升了反应器的污水处理负荷。构建了基于旋流修正的湍流模型和随机轨道模型,结合相应的计算流体力学(CFD)方法,模拟并预测了反应器内流体强烈湍动以及由此引发的颗粒涡流扩散。改进后的SII反应器实现了三维结构的循环流动以及污泥颗粒在装置内的自沉降,促进了颗粒与水相的充分接触。

With spiral flow optimization, the new SII reactor could efficiently reduce sludge granule loss under high load conditions. It also showed that contact condition between suspending granular bed and water phase was well controlled and the reactor performance was significantly improved. The stochastic tracking model and realized turbulent model （based on CFD method）were used to describe and predict the intensified turbulence flow and random granular eddy. Research shows that the SII reactor formed three-dimensional internal circulation. Activated sludge deposited in this internal circulation in the reactor, and it contacted well with water phase.