主要结构参数对污泥淤砂分离器分离效能的影响

Effect of main structure parameters on separation performance of grit separation module

为了实现污泥淤砂分离器的结构优化,重点探讨了污泥淤砂分离器主要结构参数(底流口直径du与溢流口直径do)对污泥淤砂分离器分离效能的影响。试验结果表明:随着溢流口直径的减小或底流口直径的增加,底流污泥ρ(MLVSS)/ρ(MLSS)逐渐增加,有机质富集率FVSS、淤砂富集率FISS逐渐减小,分离效率η逐渐增加。富集除砂所需要的溢流口、底流口直径与获得较高分离效率所需溢流、底流口直径是不一致的。在实际运行时应选择适合的溢流口、底流口直径,在优先保证富集排砂的前提下,提高分离器分离效率。

In order to achieve the goal of the structure optimization of the grit separation mod- ule, this paper studied the impacts of important structure parameters （overflow outlet diameter and underflow outlet diameter） on the separation efficiency of the grit separation module. The results showed that with the decrement of the overflow outlet diameter or the increment of the underflow outlet diameter, the underflow sludge＇s p（MLVSS）/p（MLSS） gradually increased and the Fvss ,FIss gradually decreased but the separation efficiency （η） gradually increased. This indicated that the di- ameters for overflow outlet diameter and underflow outlet for the enrichment degrit were different from those for high separation efficiency. The suitable diameters of overflow outlet and underflow outlet were selected to achieve simultaneously enrichment degrit and high separation efficiency in practical operation.