Characteristics of calcium carbonate fouling on heat transfer surfaces under the action of electric fields

被引：16

作者：

Xu, Zhiming ^{[1
]}

Chang, Hongliang ^{[1
]}

Wang, Bingbing ^{[1
]}

Wang, Jingtao ^{[1
]}

Zhao, Qi ^{[2
]}

机构：

[1] Northeast Elect Power Univ, Sch Energy & Power Engn, Jilin 132012, Jilin, Peoples R China

[2] Univ Dundee, Sch Sci & Engn, Dundee DD1 4HN, Scotland

来源：

JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | 2018年 / 32卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Fouling characteristics; Electric field; Anti-fouling; CaCO3; fouling; ELECTROMAGNETIC-FIELD; WATER-TREATMENT; SCALE FORMATION; MAGNETIC-FIELD; GROWTH-RATE; PRECIPITATION; EXCHANGER; TECHNOLOGY; MITIGATION; INHIBITORS;

D O I：

10.1007/s12206-018-0648-0

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The present study examined the effect of electric fields in calcium carbonate (CaCO3) scale formation on a heat transfer surface. The effects of electric fields ranging from 0 V to 4000 V on the fouling properties of CaCO3 were investigated. Results showed that the optimal electric voltage was approximately 500 V, at which the asymptotic value of fouling resistance and the deposited weight were minimal and corresponded to 52.8 % and 61.3 % reductions, respectively, compared with the results recorded at 0 V. At higher voltages of 3000 V or 4000 V, the asymptotic value of fouling resistance and the weight of fouling deposits increased relative to those obtained at 0 V. The scanning electron microscope images of the fouling deposits obtained at 0 V showed mainly aragonites with sharp and needle-like crystal structures. The structure of CaCO3 fouling changed from aragonites to spherical vaterites as the applied voltage was increased.

引用

页码：3445 / 3451

页数：7

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