聚硅氯化铁的制备及性能研究
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摘要
在各种水处理方法中,絮凝法是应用最广、成本最低、最常用的处理方法。而高效絮凝剂的研制是絮凝法的核心问题,本文是研制一种聚硅酸金属盐絮凝剂—聚硅氯化铁(英文缩写为PSFC)。以水玻璃和FeCl_3为主要原料来制备PSFC,制备方法是:用水玻璃在酸性条件下制备聚硅酸,然后在没有熟化的聚硅酸中加入FeCl_3溶液,使聚硅酸和FeCl_3反应制备得到PSFC。在PSFC的制备过程中,考察反应时间、反应时溶液的pH值、SiO_2浓度、Fe~(3+)浓度、反应温度各因素对PSFC絮凝性能的影响,得到PSFC的最佳配方和制备工艺条件。在最佳配方和制备工艺条件下制备得到PSFC,通过与现已工业化的无机高分子絮凝剂聚合氯化铝(PAC)、聚合氯化铁(PFC)絮凝效果的对比试验和处理现场采集的油田泥浆废水的效果,说明PSFC具有良好的絮凝性能,具有良好的工业应用前景。本文还探讨了PSFC的絮凝作用机理和适宜的使用工艺条件。
In the various measures of wastewater treatment, flocculation method is one of the way that has the most wide appliance and the lowest cost and is in common use. But the key of flocculation method is to study high efficiency flocculating agent. The aim of this paper is to prepare a kind of poly- silicic
    acid metal salt flocculating agent--polysilicon ferric chloride (PSFC). The
    paper adopt soluble glass and FeCl3 to develop PSFC .The method to prepare PSFC is to employ soluble glass to prepare poly-silicic acid in the acidity condition. then add solution of FeCl3 into poly-silicic acid that isn't cured aged and make poly-silicic acid and FeCb react to prepare PSFC. In the process of preparing PSFC, the paper reviews factors that influence the PSFC's flocculating performance, such as the reaction time, the pH value of the solution, the concentration of SiO2 the concentration of Fe3+ the reaction temperature. The best directions for producing chemicals or metallurgical products and the preparation technological condition are found. The result of the test that balances the PSFC prepared by the best directions for producing chemicals or metallurgical products and the preparation technological condition and industrialized abio-macromolecule flocculating agent's flocculating effect, such as poly aluminium chloride, poly ferric chloride and the effect of treating oil field slurry waste wa
    ter suggest that PSFC has excellent flocculating performance and has a good application prospect. The paper also discuss the flocculating function mechanism of PSFC and the feasible applied technological condition.
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