Effect of fouling resistance in heat exchanger and the crystal form of CaCO3 in hard circulating cooling water with electrostatic field and alternating current electric field

The effect of high voltage electrostatic field and high voltage alternating current electric field on the heat exchanger surface fouling under the conditions of hard water was investigated. The Ca2+ concentration in two water conditions was 12 mmol/L. The Mg2+ concentration was 10 mmol/L and 12 mmol...

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Autores principales:	Jing Xu, Ju-Dong Zhao, Yun Jia, Ting Li, Shuai-Bing Yang, Zhi-Hao Zhang
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	calcium carbonate fouling resistance high voltage alternating electric field high voltage electrostatic field magnesium ion Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/52ee9d159ffa415d996fcde6dabba219
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spelling	oai:doaj.org-article:52ee9d159ffa415d996fcde6dabba2192021-11-06T11:24:10ZEffect of fouling resistance in heat exchanger and the crystal form of CaCO3 in hard circulating cooling water with electrostatic field and alternating current electric field0273-12231996-973210.2166/wst.2021.344https://doaj.org/article/52ee9d159ffa415d996fcde6dabba2192021-10-01T00:00:00Zhttp://wst.iwaponline.com/content/84/7/1608https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732The effect of high voltage electrostatic field and high voltage alternating current electric field on the heat exchanger surface fouling under the conditions of hard water was investigated. The Ca2+ concentration in two water conditions was 12 mmol/L. The Mg2+ concentration was 10 mmol/L and 12 mmol/L respectively. The concentration changed with the Mg2+ concentration. X-ray diffraction and scanning electron microscope results confirmed that the main crystal phases of the scale samples consisted of calcite and aragonite. The high voltage electrostatic treatment can promote scale growth under both water quality conditions. However, the high voltage alternating current electric field treatment shows a good scale inhibition effect under both water quality conditions, and the scale inhibition effect is best when both Ca2+ and Mg2+ concentrations are 12 mmol/L, and the average scale inhibition rate reaches 47.58%. When the calcite content of the scale sample is significantly higher than that of aragonite, Mg2+ affects the growth and solubility of crystals. Conversely, the high voltage alternating current electric field treatment can effectively extend the fouling induction period of the adherent scale on the heat exchanger surface, which is favorable for heat exchanger fouling. HIGHLIGHTS The scale inhibition experiments with different electric fields and Mg2+ concentrations were designed.; Different electric fields have different treatment effects.; The FIP can be used to evaluate the scale inhibition effect.; The HVAC electric field treatment can enhance the inhibition effect of Mg2+ on crystal growth.; After the HVAC electric field treatment, the calcite content in the scale sample increases.;Jing XuJu-Dong ZhaoYun JiaTing LiShuai-Bing YangZhi-Hao ZhangIWA Publishingarticlecalcium carbonatefouling resistancehigh voltage alternating electric fieldhigh voltage electrostatic fieldmagnesium ionEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 7, Pp 1608-1622 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	calcium carbonate fouling resistance high voltage alternating electric field high voltage electrostatic field magnesium ion Environmental technology. Sanitary engineering TD1-1066
spellingShingle	calcium carbonate fouling resistance high voltage alternating electric field high voltage electrostatic field magnesium ion Environmental technology. Sanitary engineering TD1-1066 Jing Xu Ju-Dong Zhao Yun Jia Ting Li Shuai-Bing Yang Zhi-Hao Zhang Effect of fouling resistance in heat exchanger and the crystal form of CaCO3 in hard circulating cooling water with electrostatic field and alternating current electric field
description	The effect of high voltage electrostatic field and high voltage alternating current electric field on the heat exchanger surface fouling under the conditions of hard water was investigated. The Ca2+ concentration in two water conditions was 12 mmol/L. The Mg2+ concentration was 10 mmol/L and 12 mmol/L respectively. The concentration changed with the Mg2+ concentration. X-ray diffraction and scanning electron microscope results confirmed that the main crystal phases of the scale samples consisted of calcite and aragonite. The high voltage electrostatic treatment can promote scale growth under both water quality conditions. However, the high voltage alternating current electric field treatment shows a good scale inhibition effect under both water quality conditions, and the scale inhibition effect is best when both Ca2+ and Mg2+ concentrations are 12 mmol/L, and the average scale inhibition rate reaches 47.58%. When the calcite content of the scale sample is significantly higher than that of aragonite, Mg2+ affects the growth and solubility of crystals. Conversely, the high voltage alternating current electric field treatment can effectively extend the fouling induction period of the adherent scale on the heat exchanger surface, which is favorable for heat exchanger fouling. HIGHLIGHTS The scale inhibition experiments with different electric fields and Mg2+ concentrations were designed.; Different electric fields have different treatment effects.; The FIP can be used to evaluate the scale inhibition effect.; The HVAC electric field treatment can enhance the inhibition effect of Mg2+ on crystal growth.; After the HVAC electric field treatment, the calcite content in the scale sample increases.;
format	article
author	Jing Xu Ju-Dong Zhao Yun Jia Ting Li Shuai-Bing Yang Zhi-Hao Zhang
author_facet	Jing Xu Ju-Dong Zhao Yun Jia Ting Li Shuai-Bing Yang Zhi-Hao Zhang
author_sort	Jing Xu
title	Effect of fouling resistance in heat exchanger and the crystal form of CaCO3 in hard circulating cooling water with electrostatic field and alternating current electric field
title_short	Effect of fouling resistance in heat exchanger and the crystal form of CaCO3 in hard circulating cooling water with electrostatic field and alternating current electric field
title_full	Effect of fouling resistance in heat exchanger and the crystal form of CaCO3 in hard circulating cooling water with electrostatic field and alternating current electric field
title_fullStr	Effect of fouling resistance in heat exchanger and the crystal form of CaCO3 in hard circulating cooling water with electrostatic field and alternating current electric field
title_full_unstemmed	Effect of fouling resistance in heat exchanger and the crystal form of CaCO3 in hard circulating cooling water with electrostatic field and alternating current electric field
title_sort	effect of fouling resistance in heat exchanger and the crystal form of caco3 in hard circulating cooling water with electrostatic field and alternating current electric field
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/52ee9d159ffa415d996fcde6dabba219
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Effect of fouling resistance in heat exchanger and the crystal form of CaCO3 in hard circulating cooling water with electrostatic field and alternating current electric field

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