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高压静电水处理器腔内电场分布分析与阻垢效果研究

DOI: 10.13334/j.0258-8013.pcsee.2014.35.006, PP. 6296-6303

Keywords: 水处理,电场强度,双介质,方解石,文石

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Abstract:

利用自制的“高压静电水处理器”对电厂循环冷却水进行了动态模拟阻垢研究,从理论与实验的角度,分析了高压静电水处理器腔内电场分布。研究表明,离子棒高压静电场为双介质非均匀径向稳恒高压静电场,静电场中PTFE介质层构成离子棒绝缘层,水介质层构成循环冷却水与电场进行能量交换的空间;应用拉普拉斯方程对水介质空间电场分布分析表明,循环水空间的电场能量密度在10-32~10-30J/mol数量级,远未达到水分子团簇氢键破裂的能量级别,因此离子棒提供的电场能量只起到促使水分子团簇向氢键断开的方向变化,而未提供水分子团簇氢键断开的全部能量;高压静电场的阻垢作用关键是使水中成垢离子的结晶形态发生变化,电场能量使热平衡体系中的自由能ΔG增加,导致文石晶核形成的几率增大,文石晶体呈粉末状,易随水流冲走而减少了在换热表面的沉积,从而抑制方解石型水垢生长。

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