Analysis And Experimental Research On Electromagnetic Scale Inhibition Mechanism Of Calcium Magnesium Ion Solution Based On Molecular Dynamics

In industrial and domestic water,a large number of scale-forming particles accumulate in the container and react to reach a supersaturated state to form scale.Scale affects industrial production efficiency and causes economic losses to a certain extent,and may cause equipment explosion and cause dangerous accidents in serious cases.How to prevent scales reasonably and effectively has become a worldwide research problem.Electromagnetic anti-scaling technology has the advantages of strong operability,low cost,and thorough anti-scaling,which stands out from various anti-scaling methods.In this paper,relying on electromagnetic scale inhibition technology,molecular dynamics simulation of a single CaCl₂supersaturated solution system is carried out.Studies have shown that electromagnetic field treatment can effectively increase the collision efficiency and collision range of fouling ions,it can weaken the stability of the hydrogen bond network between water molecules and increase the rate of formation and aggregation of calcium carbonate crystals.Weaken the stability of the hydrogen bond network between water molecules and increase the rate of formation and aggregation of calcium carbonate crystals.At the same time,perform molecular dynamics simulation analysis on complex solutions containing calcium and magnesium ions,The simulation shows that impurity magnesium ions reduce the self-diffusion coefficient of calcium ions and water molecules,increase the viscosity of the simulated solution,and reduce the proportion of water molecules that form hydrogen bonds and the average number of hydrogen bonds.Moreover,a static and dynamic experimental platform is built to study the mechanism of electromagnetic scale inhibition from a macro level and partially verify the results of molecular dynamics simulation.From the static comparison experiment,it can be concluded that the electromagnetic field can effectively increase the growth rate and precipitation diameter of calcium carbonate crystals,and effectively increase the dissolution rate and dissolution amount of calcium carbonate.From the static comparison experiment,it can be concluded that the electromagnetic field can effectively increase the growth rate and precipitation diameter of calcium carbonate crystals,and effectively increase the dissolution rate and dissolution amount of calcium carbonate.The dynamic experiment explores the influence of different output frequencies on the electromagnetic scale inhibition effect by measuring the conductivity,pH value,average particle size and distribution of the sampled solution.The experimental results show that the output frequency of the best power supply in the selected range is 7kHz,at this time,the conductivity has dropped by369μS/cm,the pH has dropped by 0.42,and the scale inhibition rate has reached a maximum of 69.1%.The electromagnetic scale inhibition characteristics of the complex solution system containing calcium and magnesium ions and the influence of impurity magnesium ions on the formation of calcium carbonate crystals were experimentally studied.It was found that impurity magnesium ions slowed the collision reaction rate of calcium ions and carbonate ions,inhibited the precipitation and growth of calcium carbonate crystals,and at the same time changed the hydration state of the crystal surface and prevented the small crystal particles in the solution system from agglomerating into large crystal particles.,To a certain extent,has a negative impact on the electromagnetic anti-scaling effect.