L'entartrage par les eaux naturelles et l'action des appareils électriques « antitartre »

Lédion, J.; Leroy, P.; Labbé, Jérôme; Durand, G.; Duigou, Antoine Le

doi:10.1051/mattech/198068040139

Cited by 11 publications

(6 citation statements)

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“…Scale deposits by natural water in industrial plants and domestic equipment (especially for hot water) often lead to numerous technical and economic problems by blocking the flow of water in pipes or limiting the heat transfer in heat exchangers. [1][2][3][4] For scaling involved in cathodically protected metallic structures in seawater, where calcareous deposits made of a mixture of CaCO 3 and Mg(OH) 2 are observed, 5,6 scaling can be somewhat beneficial when it is sufficiently compact so that it prevents corrosion. For desalination of seawater it is rather detrimental, as it decreases the efficiency of the reverse osmosis membranes.…”

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“…Since the beginning of this century, some attempts have been made to evaluate the scaling rate in natural waters by using methods generally based on thermodynamics. However, as the scaling process largely depends on kinetic factors, thermodynamic considerations alone are not sufficient for predicting whether or not a water will form a scale 7 deposit and what its structure will be. Depending on the conditions, calcium carbonate can crystallize under three different crystal forms, calcite, vaterite, and aragonite.…”

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Influence of Water Composition and Substrate on Electrochemical Scaling

Jaouhari

Ben-Bachir²,

Guenbour³

et al. 2000

J. Electrochem. Soc.

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Scaling of gold, bronze, and stainless steel was investigated in synthetic fresh and seawater. It is shown that the calcium carbonate precipitation rate increased from stainless steel, to bronze and then to gold whatever the composition of the scaling water. The morphology of the deposited scale depended on the substrate and on its surface state. For fast scaling, as with 200 mg dm Ϫ3 Ca 2ϩ carbonically pure water, calcite was mainly deposited; for slower scaling vaterite was also observed. When foreign ions were added in the scaling water, aragonite appeared. In particular, for synthetic seawater, where magnesium ions are highly concentrated, aragonite is preferentially selected, so at the end of scaling aragonite covered the whole electrode surface. The kinetic parameters, which characterize a precipitation model, were extracted from impedance measurements through a fitting procedure. The morphology of the precipitated calcium carbonate was examined by means of a scanning electron microscope.

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confidence: 99%

Influence of Water Composition and Substrate on Electrochemical Scaling

Jaouhari

Ben-Bachir²,

Guenbour³

et al. 2000

J. Electrochem. Soc.

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“…However, reagent methods only slow down the process of scale formation inside the heat-exchange equipment (1-2 months), and do not solve the main problem of scale formation on the heating equipment elements during long-term operation. Non-reagent methods of scale prevention have been described by the authors of [13][14][15]. Non-reagent methods are used to make the heating system more efficient.…”

Section: Introductionmentioning

confidence: 99%

Thermal Protection Technology for Acoustic–Magnetic Device in a Geothermal Water Anti-Scaling System

Korzhakov

Oskin

2021

Energies

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This article presents the results of the design of acoustic–magnetic device thermal protection technology based on simulation. The acoustic–magnetic device (AMD) was installed in the heat supply system of a greenhouse complex with a geothermal heat source, developed and patented by the authors of this paper. Simulation was performed to investigate the possibility of maintaining the acoustic transmitter temperature of the acoustic–magnetic device in its operating range. The QuickField Student Edition v 6.4 simulation environment was used for this purpose. Based on the results of the simulation, the optimum thermal mode of the acoustic–magnetic device was developed and implemented. The optimum temporal operating mode of the acoustic–magnetic device is necessary for the optimization of the non-reagent treatment of geothermal water in a heat supply system of a greenhouse complex. It allows for a considerable reduction in the intensity of scale formation in the heat exchanger and equipment of a geothermal heating system. As demonstrated by the simulation thermal modes, the acoustic–magnetic device provides conditions for the work maintenance of the AMD acoustic transmitter at the resonance frequency, reduces the power expenses, and increases the efficiency of the acoustic influence on the scale formed in the heat supply system of a greenhouse complex. The results of the simulation were implemented in the greenhouse complex of JSC “Raduga.” The thermal protection technology was realized by installing two acoustic–magnetic devices and automation systems in the geothermal heating system a greenhouse complex.

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“…As known, these deposits have very serious consequences: reduction of the heat transfer effi ciency, clogging of the pipes, seizing of the stopping devices (taps, valves) as well as the health issues like the renal diseases and diseases dermatological. Several techniques are, therefore, developed to prevent scale formation by a physical [4][5][6][7][8][9] or a chemical [10,11] process. To assess the effi ciency of the water treatment, methods and techniques called "accelerated scaling methods" were developed.…”

Section: Introductionmentioning

confidence: 99%

Inhibition of CaCO₃scale formation in ground waters using mineral phosphates

Boulahlib-Bendaoud¹,

Ghizellaoui²,

Tlili³

2012

Desalination and Water Treatment

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A B S T R AC TThe present work examines the effect of two mineral inhibitors on the CaCO 3 precipitation in two Algerian ground waters. The main objective was to reduce the scaling power and then to prevent the fouling phenomenon met in the equipments supplied by these waters. It was shown that, for a large rang of temperature, Hamma water is more scale-forming water than the one of Negrine because its lower content in foreign ions to the calcocarbonic system, especially magnesium. Chronoamperometry tests show that the antiscale treatment with mineral phosphates is more effi cient for the Hamma than Negrine water. Tested inhibitors affect strongly the nucleation-growth kinetics in the case of Hamma water and only the scale compactness in Negrine water. This was attributed to the difference in the chemical composition of the studied waters. Besides, it was shown that polyphosphate is more effi cient as scaling inhibitor than the dihydrogenophosphate ions.

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L'entartrage par les eaux naturelles et l'action des appareils électriques « antitartre »

Cited by 11 publications

References 0 publications

Influence of Water Composition and Substrate on Electrochemical Scaling

Influence of Water Composition and Substrate on Electrochemical Scaling

Thermal Protection Technology for Acoustic–Magnetic Device in a Geothermal Water Anti-Scaling System

Inhibition of CaCO₃scale formation in ground waters using mineral phosphates

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L'entartrage par les eaux naturelles et l'action des appareils électriques « antitartre »

Cited by 11 publications

References 0 publications

Influence of Water Composition and Substrate on Electrochemical Scaling

Influence of Water Composition and Substrate on Electrochemical Scaling

Thermal Protection Technology for Acoustic–Magnetic Device in a Geothermal Water Anti-Scaling System

Inhibition of CaCO3scale formation in ground waters using mineral phosphates

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Product

Resources

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Inhibition of CaCO₃scale formation in ground waters using mineral phosphates