改进隔板絮凝池的数值模拟和实验

Numerical simulation and experiments on improved baffled flocculation tank

通过在廊道中增加了V型穿孔挡板,对传统往复式隔板絮凝池进行了改进,利用数值模拟和实验方法,探讨了改进絮凝池中流态、湍动能(κ)、耗散率(ε)分布情况以及这些参数对絮凝效果的影响。对多种方案进行了优化计算和实验,结果表明,在隔板絮凝池第1个廊道进口1/3和2/3处设置2个120°多孔V型挡板在各种方案中絮凝效果最好,能有效地增加水体紊动,提高絮凝效果,增设V型穿孔挡板后可以适当减少隔板絮凝池长度。

The traditional reciprocating baffled flocculation was modified by adding a V-shaped perforated baffle in the reaction corridor to improve the flocculation. Numerical simulation and experimental test were used to study the flow field, turbulent kinetic energy （κ） and dissipation rate （ε） on the flocculation. A variety of configurations were optimised by the numrieal simulation and experiment tests. The results indicated that the optimum floecu｜ation occurs when the 120° V-shaped porous baffle are installed in the location of 1/3 and 2/3 of the first corridor,which effectively increase the turbulence of water body. The lenth of baffled floceulation tank may be reduced by the instalhion V-shaped perforated baffles,