ISSN 1000-3665 CN 11-2202/P
    张溪彧,董书宁,王锐,等. 含悬浮物矿井水微絮凝-多级过滤工艺研究[J]. 水文地质工程地质,2023,50(5): 222-230. DOI: 10.16030/j.cnki.issn.1000-3665.202208080
    引用本文: 张溪彧,董书宁,王锐,等. 含悬浮物矿井水微絮凝-多级过滤工艺研究[J]. 水文地质工程地质,2023,50(5): 222-230. DOI: 10.16030/j.cnki.issn.1000-3665.202208080
    ZHANG Xiyu, DONG Shuning, WANG Rui, et al. A study of the microflocculation-multistage filtration technology of mine water containing suspended solids[J]. Hydrogeology & Engineering Geology, 2023, 50(5): 222-230. DOI: 10.16030/j.cnki.issn.1000-3665.202208080
    Citation: ZHANG Xiyu, DONG Shuning, WANG Rui, et al. A study of the microflocculation-multistage filtration technology of mine water containing suspended solids[J]. Hydrogeology & Engineering Geology, 2023, 50(5): 222-230. DOI: 10.16030/j.cnki.issn.1000-3665.202208080

    含悬浮物矿井水微絮凝-多级过滤工艺研究

    A study of the microflocculation-multistage filtration technology of mine water containing suspended solids

    • 摘要: 针对含悬浮物矿井水处理过程中固液分离困难的问题,基于核晶凝聚诱导造粒理论,通过室内试验的研究方法,开展矿井水微絮凝-多级过滤工艺研究。首先,通过药剂投加与水利条件调节,诱导悬浮颗粒与絮凝剂形成共聚物,形成絮体沉降时间曲线,通过最优参数选取完成絮体造粒致密化;其次,选择石英砂、人造沸石、活性炭、风积沙 4 种过滤介质,考察不同介质类型及粒径对污染组分脱除效率的影响,分析固-液界面产生的物理作用及化学反应;最终,选取典型矿井开展现场试验,验证该工艺对于不同污染组分的脱除效果。结果表明:(1)在微絮凝阶段采用200 mg/L的 聚合氯化铝及200 mg/L的硅藻土联合投加的方式可以大幅度降低沉降时间;(2)在多级过滤阶段1~2 mm石英砂对于浊度去除率可达97.9%,而 4 种过滤介质中人造沸石对于无机离子脱除效果最优,对于 \rmSO_4^2 - 、 \rmHCO_3^- 、Na+去除率分别达到25.5%、44.1%、69.9%。通过研究成果形成的微絮凝-多级过滤工艺可以大幅度降低矿井水处理过程中的停留时间,提高固液分离效率,在此基础上选用天然硅藻土作为成核剂替代聚丙烯酰胺还能有效抑制丙烯酰胺单体的生成,可降低环境风险。该工艺对于含悬浮物矿井水处理具有良好推广应用价值。

       

      Abstract: In order to solve the problem of difficult solid-liquid separation in the treatment of mine water containing suspended solids, based on the theory of nuclear crystal coagulation induced granulation, the process of “micro flocculation multi stage filtration” of mine water is studied through laboratory experiments. First of all, through the adjustment of reagent dosage and water conservancy conditions, the suspended particles and flocculants are induced to form a copolymer to form a floc settling time curve, and the floc granulation and densification are completed through the selection of optimal parameters. Secondly, four filter media of quartz sand, artificial zeolite, active carbon and aeolian sand are selected to investigate the effects of different media types and particle sizes on the removal efficiency of pollutants, and the physical and chemical reactions generated at the solid-liquid interface are analyzed. Finally, field tests are carried out in typical mines to verify the removal effect of the process on different pollution components. The results show that (1) the sedimentation time can be greatly reduced by adding polyaluminum chloride of 200 mg/L and diatomite of 200 mg/L in the micro flocculation stage. (2) The turbidity removal rate of 1−2 mm quartz sand in the multi-stage filtration stage can reach 97.9%, while the artificial zeolite in the four filter media is the best for the removal of inorganic ions. The removal rates of \rmSO_4^2 - , \rmHCO_3^- and Na+ in the filtered water can reach 25.5%, 44.1% and 69.9%, respectively. The micro flocculation multi-stage filtration process formed through the research results can greatly reduce the residence time in the process of mine water treatment and improve the solid-liquid separation efficiency. On this basis, the selection of natural diatomite as nucleating agent instead of polyacrylamide can effectively inhibit the generation of acrylamide monomer and reduce environmental risks. In addition, the process has a certain removal effect on inorganic ions. It is good application value for the treatment of mine water containing suspended solids.

       

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