锥盘旋流澄清器分离性能试验研究

Experimental study on separation performance of conical-disk cyclone clarifier

基于采用混凝沉淀法进行污水处理中比重轻、粒径小的颗粒难以除去,且混凝沉淀设备占地面积大、能耗高等原因,提出用锥盘旋流澄清器来处理污水,加入锥盘来增大沉降面积,加速絮体的沉降。通过对比试验探明加入锥盘可以有效提高旋流澄清器的分离性能,并通过性能试验研究其结构参数对分离性能的影响规律。结果表明:筒体高度、锥盘插入深度和锥盘盘间距对分离性能的影响较大;在筒体高度为600 mm,锥盘插入深度为400 mm,锥盘盘间距为20 mm,溢流口直径为40 mm的工况下,处理悬浮物含量约为450 mg/L,浊度约为125 NTU的煤泥水时,悬浮物去除率为93.7%,浊度去除率为70.2%。

In sewage treatment with coagulation and sedimentation method, it is difficuh for lighter and finer particles to get separated. What＇s more, the equipment occupies a large floor space and operates with a high energy consumption. It is, therefore, proposed to switch to the use of the conical-disk cyclone clarifier. Inside the clarifier, a number of cone-shaped discs are fitted for obtaining a larger settling area and a higher settling rate of flocs. As evidenced by comparative test, the addition Of the cone-shaped discs can effectively improve the separating performance of the clarifier. The law governing the effect on the performance of clarifier produced by variation of its structural parameters is investigated through performance test. Test result shows that the height of the cylindrical part and the insertion depth of and spacing between discs exert a significant bearing on the performance of the clarifier. With the use of the clarifier for treating coal slurry water having a content of suspended solids of 450 g/L, a turbidity of 125 NTU, a height of its cylindrical part of 600 mm, an insertion depth of disc of 400 mm, a spacing of 20 mm between discs and an overflow orifice diameter of 40 mm, up to 93 percent of solid particles can be separated out with a reduction of turbidity by 70.2%.