Research On Key Technologies Of Scale Inhibition For Alternating Electromagnetic And Ultrasonic

Scale problem is an inevitable problem with domestic and industrial water use,continued deposition of scale would block pipes,corrode metals and reduce heat exchange efficiency.In severe cases,it can cause major safety accidents such as explosions,causing casualties and huge economic losses.In recent years,alternating electromagnetic fields and ultrasonic physical water treatment methods have been widely used to alleviate scale problems due to their characteristics such as good anti-scaling effect,no equipment destructive and non-polluting.So far,there are still many doubts about the scale inhibition effect and mechanism of alternating electromagnetic field and ultrasonic,which makes the scale inhibition effect of the two in actual anti-scaling applications not stable enough.The purpose of this paper is to investigate the scale inhibition effect of alternating electromagnetic field and ultrasonic in the presence of magnesium ions and scale inhibitor,on the basis of improving the alternating electromagnetic field and ultrasonic scale inhibition efficiency.Provide important theoretical and practical guidance for the application and development of physical scale inhibition technologies.This paper focuses on the research of alternating electromagnetic fields and ultrasonic scale inhibition technologies.Aiming at the problem that the synergistic scale inhibition mechanism of alternating electromagnetic fields and ultrasonic is still unclear.Synergistic scale inhibition experiments were carried out,for analyzing the changes of pH and conductivity of Ca?HCO₃?₂ solutions under the synergistic action of alternating electromagnetic field and ultrasonic.Analyzed the effect and mechanism of synergistic effect on the formation and growth of scale crystals based on these experiments.Combined with particle size distribution of suspended CaCO₃ particles,turbidity change in hard water solutions and scanning electron microscopy?SEM?results of CaCO₃ crystal.Studied and discussed the changes and mechanisms of scale crystal formation and growth process under the synergistic action of these two physical methodsIn view of the phenomenon that impurity Mg²⁺ions can significantly affect the formation and crystallization of CaCO₃.Studied the mechanism of the effect of impurity Mg²⁺ions on the scale inhibition effect of alternating electromagnetic field and ultrasonic.The nucleation and growth process of CaCO₃ crystals were analyzed by observing the changes of pH,conductivity,turbidity and particle size distribution of hard water solutions under different magnesium ion concentrations.The crystal phase and microscopic morphology of the precipitated crystals were observed by XRD and SEM,and therefore proposed an effective new scale inhibition scheme.We introduced the alternating electromagnetic fields and ultrasonic during the use of scale inhibitors,in order to explore the effect of alternating electromagnetic field and ultrasonic on the scale inhibition effect of scale inhibitor and its mechanism.The scale inhibition efficiencies were characterized by measuring pH and Ca²⁺concentrations of hard water solutions,the crystal phase and microscopic morphologies of precipitated CaCO₃crystals were analyzed by means of XRD and SEM.It provided theoretical basis and technical supports for the improvement of scale inhibition efficiency by physical methods.