Abstract: Reasonable selection of electromagnetic frequency is one of the necessary conditions for the best result of electromagnetic anti-scaling. This research designed a set of static electromagnetic experiment with electrical conductivity method, based on the analysis of the present and commonly used anti-scaling performance evaluations. Titration experiment was conducted according to the conductivity titration method. The characteristics of varying conductivity with time in the titration process under the given experimental conditions were compared. The effects of different frequency electromagnetic fields on the scale inhibition performance were investigated. The results showed that conductivity changed over time under the different electromagnetic frequencies. The regression model and the optimum frequency of electromagnetic anti-scaling were obtained. The method developed in this research is stable and repeatable and could effectively meet the needs of the accurate and rapid evaluation of electromagnetic anti-scaling performance.

Key words: electromagnetic frequencies, scale performance, evaluation method, conductivity

摘要： 变频电磁法进行抑垢处理，具有应用方便、投资小、无污染等优点，是一种极具发展前景的应用技术。合理选择电磁频率，是达到电磁抑垢最佳效果的必要条件之一。本文在分析了当前常用抑垢性能评价方法的基础上，根据电导滴定法，设计了电导率法的静态电磁实验装置，在给定实验条件下进行了滴定实验，并对实验过程中电导率随时间变化的特征进行了对比分析，研究了不同频率的电磁场对抑垢性能的影响。给出了不同电磁频率下电导率随时间变化的实验结果及回归模型，确定了电磁抑垢最佳频率值。该方法具有比较好的稳定性、重复性，能更好地满足众多行业用户对电磁抑垢性能评定的需求。

关键词: 电磁频率, 抑垢性能, 评定方法, 电导率