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Improving the Efficiency of Natural Raw Water Pretreatment at Thermal Power Stations

机译：提高火力发电厂天然原水的预处理效率

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AbstractIn the treatment of make-up water for thermal power stations (TPS) and heat networks, raw water from surface water bodies is used. It contains organic and mineral pollutants in the form of particulates or colloids. Coagulation and flocculation are reagent methods for removing these pollutants from water. Chemicals are used to assist in the formation of large structured flakes that are removed easily from water. The Kuibyshev water reservoir was selected as the object of investigation. Basic physical and chemical properties of the raw water are presented. The application of various coagulating agents, their mixtures in different proportions, and flocculating agents for clarifying the Volga water was examined. The required dose of a coagulant or flocculant was determined based on test coagulation of the treated water. Aluminum sulfate and iron (III) chloride were used a coagulant, and Praestol 2500 (nonionic) as a flocculant. A method of enhancement of coagulation and flocculation by injecting air into the treated water is examined. The results of experimental investigation of the effect of water treatment method on water quality indices, such as alkalinity, pH, iron content, suspended material content, and permanganate value, are presented. It is demonstrated that joint use of ironand aluminum containing coagulation agents brings the coagulation conditions closer to the optimum ones. Aeration does not affect the coagulation process. The methods for supplying air to a clarifier are proposed for practical implementation.
机译： 摘要 在处理火力发电厂（TPS）和热网的补充水时，地表水体中的原水为用过的。它包含颗粒或胶体形式的有机和矿物污染物。混凝和絮凝是从水中去除这些污染物的试剂方法。化学品可用于帮助形成易于从水中去除的大型结构性薄片。选择了库比雪夫水库作为调查对象。介绍了原水的基本物理和化学性质。为了澄清伏尔加河水，研究了各种凝结剂，其不同比例的混合物以及絮凝剂的应用。凝结剂或絮凝剂的所需剂量是根据处理后水的凝结试验确定的。硫酸铝和氯化铁（III）用作凝结剂，Praestol 2500（非离子）用作絮凝剂。研究了通过将空气注入处理过的水中来增强凝结和絮凝的方法。给出了水处理方法对碱度，pH，铁含量，悬浮物含量和高锰酸盐值等水质指标影响的实验研究结果。结果表明，联合使用含铁和铝的混凝剂可使混凝条件更接近最佳条件。曝气不影响凝结过程。提出了向澄清池供气的方法，以供实际实施。

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