论文部分内容阅读
以硫酸铝为混凝剂,采用智能光散射分析仪(IPDA)对絮体破碎与再絮凝过程进行连续在线监测,考察了pH值和硫酸铝投量对絮体形成及破碎后再絮凝的影响。结果表明:当电性中和作用占主导时(硫酸铝投量为0.12 mmol/L,以Al计),絮体破碎后能继续再絮凝,高岭土-铝体系中产生的絮体恢复因子高达117%,高岭土-腐殖酸-铝体系中产生的絮体恢复因子高达110%;当网捕卷扫作用占主导时(硫酸铝投量≥0.2 mmol/L),絮体破碎后不能完全恢复,恢复效果不如电性中和作用下的;腐殖酸的存在明显影响絮体形成和破碎后再絮凝过程的絮凝指数。
Using aluminum sulfate as coagulant, continuous and on-line monitoring of flocculation and re-flocculation was carried out by using intelligent light scattering analyzer (IPDA). The effects of pH value and aluminum sulfate dosage on floc formation and crushing and flocculation were investigated. . The results showed that the flocculation could continue to flocculate after the flocculation was broken when the electric neutralization dominated (aluminum sulfate dosage was 0.12 mmol / L, calculated as Al), and the floc recovery factor in the kaolin-aluminum system was as high as 117 %, The floc recovering factor in the kaolin-humic acid-aluminum system was as high as 110%. When the sweeping effect of net catch was predominant (aluminum sulfate dosage≥0.2 mmol / L) The recovery is not as good as that under the neutralization of electricity. The presence of humic acid obviously affects the flocculation index of the flocculation after floc formation and crushing.