The effects of colloidal SiO2 and inhibitor on the solid deposit formation in geothermal water of low hardness

Stankovic, J Novica; Randjelovic, Marjan; Purenović, Milovan M.

doi:10.2298/hemind100716058s

Cited by 2 publications

(2 citation statements)

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“…From a chemical point of view, the synergy and presence of certain impurities in dissolved and colloid state have been clarified. This research will not consider the hydrochemical parameters of balance disruption of calcium and magnesium bicarbonates, 3 namely the changes which lead to the formation of the carbonate anion CO 2 firstly and later the carbonates of calcium and magnesium (CaCO 3 and MgCO 3 ) and the appearance of the solid deposit formation phenomenon -limescale, but it will analyse the effect of parameters on solid deposit formation -limescale.…”

Section: Introductionmentioning

confidence: 99%

Modelling of hydrochemical and hydromechanical parameters’ synergism in the process of solid deposit creation in geothermal and other hard waters

Milićević¹,

Anđelković

Mitić

et al. 2018

JSCS

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This paper presents the experimental research results, regarding the effect of hydromechanical parameters and based on the relative reduction of the starting hardness of geothermal water of Sijarinska Banja and Niška Banja as well as the water from the Medijana spring in Niš. The measurements were conducted on a laboratory pilot plant/ facility with glass pipes of diameter 2, 4, 6, 8 and 10 mm and with water flow controlled by a digital peristaltic pump with a flow interval from 2 to 5000 ml min-1. The effect of the hydrodynamic parameters on the change of input hardness of geothermal and other hard waters and the process of solid deposit creation were modelled by an empirical model based on simple linear regression analysis, multiple linear regression model and the neural network. The high accuracy of all applied models unequivocally proves that a synergism of hydrochemical and hydrodynamic parameters exists in the process of creation of solid deposit-limescale, thanks to which the starting hypothesis is confirmed.

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Section: Introductionmentioning

confidence: 99%

Modelling of hydrochemical and hydromechanical parameters’ synergism in the process of solid deposit creation in geothermal and other hard waters

Milićević¹,

Anđelković

Mitić

et al. 2018

JSCS

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“…This object of this study is not to analyse the hydrochemical parameters of de-balancing of calcium and magnesium bicarbonates (the ABC of the solid deposit formation [14]), i.e., the changes that first lead to the creation of carbonate anion CO 3 2and then to the creation of calcium and magnesium carbonates (CaCO 3 and MgCO 3 ); rather, it focuses on analysing the influence of a hydromechanical parameter (flow velocity) on the formation of solid deposits, and decrease of the initial water hardness.…”

mentioning

confidence: 99%

Synergy of hydromechanical and hydrochemical parameters in formation of solid deposits in geothermal and other waters

Andjelkovic

Purenović

Randjelovic

et al. 2014

CI&CEQ

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Article Highlights• The efficiency of the solid deposits formation in the turbulent and laminar flow conditions of water is examined • The critical flow velocity is lower in the geothermal waters, and higher in drinking water • For different waters of approximately the same hardness, different critical flow velocities were obtained • There is a significant impact of colloidal state on the formation of microdisperse system • Mineralized waters contain colloidal matter and therefore have lower values of the critical flow velocity Abstract This paper deals with synchronised influences of hydromechanical and hydrochemical parameters on the formation of solid deposits in geothermal and other waters, which compose complex heterogeneous and micro-heterogeneous liquid-solid systems. The constituents of these waters in ionic, colloidal and micro-heterogeneous suspended liquid-solid states are responsible for the creation of carbonates, sulphates and other solid matters. In these processes, one cannot eliminate the influence of hydromechanical parameters with flow velocity and water flow criteria (laminar or turbulent flow) as vital factors. Experiments were conducted on the laboratory pilot installation with glass pipes of 2, 4, 6, 8 and 10 mm in diameter, respectively, and the flow was monitored by using a digital peristaltic pump with the flow rate of 2 ml/min to 5000 ml/min. The paper studies the impact of the linear flow velocity on the relative decrease of the initial water hardness in geothermal waters of Sijarinska Banja spa, Niška Banja spa and the estuary water of Medijana, Niš. From the obtained dependences, according to the linear regression model, for each diameter, critical values for linear velocities were determined, as an important parameter for the understanding of the synergism of the hydromechanical and hydrochemical parameters were determined.Keywords: microturbulence, microdispersion systems, water hardness, critical linear velocity, solid deposits.Geothermal, underground and other waters of high mineralization and high hardness comprise very complex composite heterogeneous systems playing a vital role in the energy efficiency, especially in dis-Correspondence: M.M. Purenović,

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The effects of colloidal SiO2 and inhibitor on the solid deposit formation in geothermal water of low hardness

Cited by 2 publications

References 12 publications

Modelling of hydrochemical and hydromechanical parameters’ synergism in the process of solid deposit creation in geothermal and other hard waters

Modelling of hydrochemical and hydromechanical parameters’ synergism in the process of solid deposit creation in geothermal and other hard waters

Synergy of hydromechanical and hydrochemical parameters in formation of solid deposits in geothermal and other waters

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