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首页> 外文期刊>Thermal engineering >Development of Methods for the Decrease in Instability of Recycling Water of Conjugated Closed-Circuit Cooling System of HPP
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Development of Methods for the Decrease in Instability of Recycling Water of Conjugated Closed-Circuit Cooling System of HPP

机译：降低HPP共轭闭式冷却系统循环水不稳定性的方法开发

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摘要

On Russian HPPs, conjugated closed-circuit cooling systems, where purge water is used as initial for water-treatment facilities, are widespread. For this reason, it is impossible to use general methods for the stabilization treatment of recycling water in order to prevent scale formation in the units of a system, namely, turbine condensers and cooling towers. In this paper, the methods for the decrease in the instability of recycling water using the methods of chemical engineering, such as stabilization and synchronization of flows and organization of recycles, are suggested. The results of an industrial experiment on the implementation of stabilization treatment of recycling water by the organization of recycle are given. The experiment was carried out on Kazan CHPP-3. The flow scheme involved the recycle of chemically purified water (CPW) for the heat network make-up to the closed-circuit cooling system. The experiment was carried out at three stages with the gradual change of the consumption of the recycle, namely, 0, 50, and 100 t/h. According to the results of experiments, the reliable decrease in the rate of the sedimentation was recorded on the units of the system, namely, turbine condenser and chimney-type cooling tower. This is caused by two reasons. Firstly, this is periodic excessive concentration of recycling water due to the nonstationary character of inlet and outlet flows. Secondly, this is seasonal (particularly, in the summer period) exceeding of the evaporation coefficient. As a result of stabilization and synchronization of flows and organization of recycles, the quality of clarified and chemically purified water for the heat network make-up increases and the corrosion of iron- and copper-containing structural materials decreases. A natural decrease in temperature drop on the operating turbine condensers is mentioned.
机译：在俄罗斯的HPP上，广泛使用共轭闭路冷却系统，在该系统中，吹扫水最初用作水处理设施。因此，不可能使用一般的方法来稳定处理循环水，以防止在系统的各个单元（即涡轮冷凝器和冷却塔）中形成水垢。本文提出了使用化学工程方法减少循环水不稳定性的方法，例如流量的稳定和同步以及循环的组织。给出了通过循环组织实施循环水稳定化处理的工业实验结果。实验在喀山CHPP-3上进行。该流程涉及将化学纯净水（CPW）循环用于热网补充至闭路冷却系统。实验分三个阶段进行，循环消耗量逐渐变化，分别为0、50和100 t / h。根据实验结果，在该系统的单元，即涡轮冷凝器和烟囱式冷却塔上，记录了沉降速率的可靠降低。这是由于两个原因引起的。首先，由于入口和出口流量的不稳定特性，这是周期性的循环水浓度过高。第二，这是季节性（尤其是在夏季）超过蒸发系数的季节。由于流量的稳定和同步以及循环的组织，用于热网补给的纯净水和化学净化水的质量提高了，含铁和铜的结构材料的腐蚀降低了。提到了运行中的涡轮冷凝器的温度下降自然下降。

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