【摘要】 基于在线钠表的测量原理,分析了水样pH值、流速、温度和液接电位等因素对发电厂水汽系统中在线钠表测量准确性的影响,并对每一类影响因素产生的误差进行了计算分析,最后提出了相应的解决方法。研究结果表明,当控制水样pH值大于10.5、流速小于4 L/h、温度在(25±1)℃之间时,使用双液接界参比电极或固体参比电极并保证水路系统无憋压,可大幅提高在线钠表的测量准确性。更多还原

【Abstract】 Based on the measuring principle of online sodium meter,the influences of various factors,including pH of the water sample,flow velocity,temperature and liquid junction potential on the measurement accuracy of online sodium meter for steam-water system in power plant are analyzed.The error caused by each type of the influence factor is calculated and analyzed,and corresponding solution is proposed.The research indicates that controlling the pH of sample water >10.5,flow velocity <4 L/h,temperature between(25±l)℃,using double junction reference electrodes or solid reference electrodes,and keeping waterway system without pressureout will greatly enhance the measurement accuracy of online sodium meter.更多还原