CONTROL OF COOLING WATER STABILITY WITH RESPECT TO CARBONATE DEPOSITS
DOI:
https://doi.org/10.20535/2218-93002722020209843Keywords:
cooling water, deposits, stability index, calcium carbonate, stability correctionAbstract
It is shown that according to the analysis of deposits on the condensers of 22 power plants the main component of deposits is calcium carbonate. Magnesite is practically not available in the deposits. Mg2+ ions in circulating water behave like chlorides being concentrated during evaporation. Note that the existing methods for determining the stability of cooling water (CW) provide only qualitative information about its stability. They rely on the use of total hardness and give incorrect stability values. The method for the quantitative determination of the degree of CW stability is suggested, which is based on measurements of the concentration of Ca2+ ions in the CW and in the feed water and on the determination of the degree of concentration of salts in the CW. Based on these parameters, the CW stability index is calculated in relation to CaCO3 formation. Having current values of the stability index, it is proposed to promptly develop and correct measures to achieve the required level of CW stability, for example, to determine the value of acidification or blowing of the circulating cooling system which is sufficient for achieving an expected degree of stability.References
Alekin O.A. Fundamentals of Hydrochemistry. Hydrometizdat. Leningrad. 1970.- 444P.(in Russian).
Andronov V.A. Main dependences characterizing salt (material)and water balances of circulating cooling systems of industrial enterprises// Public utilities of the cities. 2004. Ed. 60. P. 151–155 (in Russian).
Dyatlova N. M. Complexons and complexonates of metals. / N. M. Dyatlova, V. Ya. Tyomkina, K. I. Popov. M.: Chemistry, 1988 . 544P (in Russian).
Gayevskii V.R., Kochmarskii V.Z. Efficiency increase of circulated cooling systems by minimizing calcium carbonate deposits. (Rivne, 2018) 154P. [ISBN 9789663273839] (in Ukrainian).
Guidelines for predicting the chemical composition and scale-forming properties of cooling water for power plants: RD 34.37.307–87. - Offic. ed. - Moscow: SPO Soyuztekhenergo: USSR Ministry of Energy, 1989. – 40P. (Guiding document of the USSR Ministry of Energy) (in Russian).
Kochmarskii V.Z., Gayevskii V.R., Tyshko N.L. Calcium carbonate crystallization from hydrocarbonate solutions. Ukr. J. Phys. 2017. V. 62. No 5. P. 382-391. DOI 10.15407/ujpe62.05.0382
Kochmarskii V.Z., Kochmarskii O.V. Deposits in circulating systems of heat power plants. // Heat engineering. New challenges of the time. Bulletin of scientific papers. Editors: P. Omelianovskyi, V. Mysak. Lviv: Ukrainian technologies. 2009. P. 535-546 (in Ukrainian).
Kochmarskii V.Z., Pospelov D.N. The state of the problem of anti-flood water treatment in the USSR. - Kyiv: Knowledge. 1986. - P. 20 (in Russian).
Kucherenko D.I. Circulated water supply (Water cooling systems). Moscow: Strojizdat, 1980. – P. 169 (in Russian).
Pat. UA 114060. The method of determining stability index of circulated water in systems of technical water supply concerning the formation of solid CaCO3. Kochmarskii V.Z., Kochmarskii O.V. Bull. No 4 of 27.02.2017 (in Ukrainian).
Pat. UA 128018. The method of determining the dosage of the inhibitor necessary for the expected level of stability of the water circulating system and with regards to calcium carbonate. Kochmarskii V.Z., Kochmarskii O.V. Bull. No . No 16 of 27.08. 2018 (in Ukrainian).
Shabalin А.F. Circulated water supply of industrial enterprises. Moscow: Publ. House on constructions. 1972. – P. 296(in Russian).
State Building Code (SBC) V.2.5-74: 2013. External networks and facilities. Basic design points (in Ukrainian).
Downloads
Published
Issue
Section
License
Copyright (c) 2020 Volodymyr Kochmarskii
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
The ownership of copyright remains with the Authors.
Authors may use their own material in other publications provided that the Journal is acknowledged as the original place of publication and National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” as the Publisher.
Authors are reminded that it is their responsibility to comply with copyright laws. It is essential to ensure that no part of the text or illustrations have appeared or are due to appear in other publications, without prior permission from the copyright holder.
WPT articles are published under Creative Commons licence:- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under CC BY-NC 4.0 that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal. The use of the material for commercial purposes is not permitted.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work.
