电厂设备抽油机冷却系统动力油的诊断

S. Zaitsev, V. Тikhenko
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摘要

本文介绍了对核电站设备冷却剂循环系统抽油机“Tp-30”能源油诊断方法进行改进的结果。在研究该油的物理化学和热物理性质时,发现:“酸值”、“含水量”、“机械杂质含量”、“添加剂“离子醇”含量、“闪点”、“运动粘度”等指标均符合既定标准。测定本油样品中添加剂“离子醇”浓度时:采用添加添加剂“离子醇”的方法;所得计算公式中,不采用“汽轮油-添加剂“离子醇”-液体萃取剂”体系中添加剂“离子醇”的分布系数,简化了该添加剂在汽轮油中含量的研究。用气相色谱法和K. Fischer试剂库仑滴定法测定的矿物油的含水量超过用热萃取法测定的矿物油的含水量。在研究萃取温度对添加剂“离子醇”的影响时(测定其在给定油中的含量时),气相色谱法发现:在15 ~ 75 0С温度范围内,分布系数Ki对温度t的依赖关系可表示为:lnKi = А/(t+273) - B;建议在温度为(20±2)°С或温度为(65±10)°С的条件下从该油中提取Ionol添加剂。在研究萃取剂的化学性质对该油中“离子醇”添加剂萃取能力的影响时,发现:乙醇、异丙醇、乙腈可作为“离子醇”添加剂的萃取剂,而“乙腈-水”混合物不能作为“离子醇”添加剂的萃取剂。所得结果可用于改进带压水堆的核电站二回路设备冷却剂循环系统抽油机矿物油“Tp-30”的诊断方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
DIAGNOSIS OF POWER OIL IN PUMPING UNITS COOLING SYSTEMS OF POWER PLANT EQUIPMENT
The article presents the results of improving the methods for diagnosing the energy oil “Tp-30” of the pumping unit of the NPP equipment coolant circulation system. When studying the physicochemical and thermophysical properties of this oil, it was found that: the indicators “acid number”, “water content”, “content of mechanical impurities”, “content of the additive “Ionol”, “flash point”, “kinematic viscosity” correspond to the established standards. When determining the concentration of the additive “Ionol” in the sample of this oil: the method of adding the additive “Ionol” is used; in the obtained calculation formula, the values of the distribution coefficient for the additive “Ionol” in the system “turbine oil – additive “Ionol” – liquid extractant” are not used, which simplifies the study of the content of this additive in turbine oil. The water content in mineral turbine oil, determined by gas chromatography and coulometric titration with K. Fischer’s reagent, exceeds the water content in this oil, determined by thermal extraction. When studying the effect of liquid extraction temperature on additives “Ionol” (when determining its content in a given oil), it was found by gas chromatography that: the dependence of the distribution coefficients Ki on temperature t in the temperature range 15–75 0С can be expressed by the equation lnKi = А/(t+273) – B ; It is recommended to extract the Ionol additive from this oil at a temperature of (20 ± 2) °С or at a temperature of (65 ± 10) °С. When studying the effect of the chemical nature of the extractant on the ability to extract the “Ionol” additive from this oil, it was found that: ethanol, isopropanol, acetonitrile can be used as extractants of the “Ionol” additive, and the mixture “acetonitrile – water” cannot be recommended as such extractant. The results obtained can be used to improve the method of diagnosing mineral turbine oil “Tp-30” of the pumping unit of the coolant circulation system of the equipment of the second circuit of NPP with a pressurized water power reactor.
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