Scale formation in circulating systems of water use

Authors

  • Сергей Павлович Высоцкий Automobile and highway institute of “Donetsk National Technical University” Kirova str., 51 apt., Gorlovka, Ukraine, 84646, Ukraine https://orcid.org/0000-0003-1812-2703
  • Алексей Витальевич Варивода LTD “Interregional center for oil and gas technologies” Chernishevska srt., 13 apt., Kharkiv, 61057, Ukraine https://orcid.org/0000-0001-8974-3991

DOI:

https://doi.org/10.15587/1729-4061.2013.19483

Keywords:

circulating systems, crystallization, scale formation, surface-active substances, calcium carbonate, antiscale additives

Abstract

The main form of deposits in the circulating water systems is thecrystals of calcium carbonates and iron compounds. The crystals of calcium carbonate are formed as a result of transition of carbon dioxide to the gas phase.

The studies of the crystallization of calcium carbonate from water solutions of calcium hydrogen carbonate with and without the addition of corresponding salts were carried out. To confirm the influence of the surface-active substances (SAS) OP-7 and OP-10 on the crystallization processes, a series of experiments at different dosages of SAS were performed.

The increase in the heating temperature and solution concentration leads to the increase in the size of crystals, depositing on the glass plate. Small crystal formations are unstable and can be dissolved under the influence of fluctuations of hydrodynamic flows, as well as under the influence of physicochemical processes due to the shift of the calcium carbonate equilibrium under the influence of fluctuations of the concentration of carbon dioxide.

Anti-scale additives of hexametaphosphate and tripolyphosphate type reduce the intensity of scale formation and change the conditions of calcium carbonate crystallization. In all experiments when using hexametaphosphate with the concentration of

10 mg/dm3 and tripolyphosphate from 1 to 500 mg/dm3 as the additives, very small calcite crystals of 1-2 microns in size are formed. All other things being equal, the reduction in the concentration of tripolyphosphate to 0.5 mg/dm3 leads to the formation of crystals in the form of “needles” and “flowers” with the size of 100-160 microns.

Author Biographies

Сергей Павлович Высоцкий, Automobile and highway institute of “Donetsk National Technical University” Kirova str., 51 apt., Gorlovka, Ukraine, 84646

Doctor of engineering, Professor, Head of a department

The department of ecology and life safety activities

Алексей Витальевич Варивода, LTD “Interregional center for oil and gas technologies” Chernishevska srt., 13 apt., Kharkiv, 61057

Director

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Published

2013-12-17

How to Cite

Высоцкий, С. П., & Варивода, А. В. (2013). Scale formation in circulating systems of water use. Eastern-European Journal of Enterprise Technologies, 6(6(66), 57–61. https://doi.org/10.15587/1729-4061.2013.19483

Issue

Vol. 6 No. 6(66) (2013): Technology of organic and inorganic substanse

Section

Technology organic and inorganic substances

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Copyright (c) 2014 Сергей Павлович Высоцкий, Алексей Витальевич Варивода

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