Research on Descaling Characteristics and Simulation Calculation of a Coaxial High-Frequency Electronic Descaling Device
1
School of Energy and Power Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China
2
School of Computer Science, Central South University, 932 Lushan South Road, Changsha 410083, China
*
Author to whom correspondence should be addressed.
Academic Editor: Mika Sillanpää
Water 2021, 13(6), 789; https://doi.org/10.3390/w13060789
Received: 15 February 2021
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Revised: 9 March 2021
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Accepted: 11 March 2021
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Published: 14 March 2021
(This article belongs to the Section Wastewater Treatment and Reuse)
High-frequency electronic descaling devices are physical water treatment methods that use a high-frequency electromagnetic field to prevent and remove scale. The effectiveness of the method is verified by monitoring the growth of scale on the surface of heat exchange tubes. The microstructure of scale obtained from experiments is analyzed by scanning electron microscope (SEM), and the action characteristics of high-frequency electromagnetic fields on water are explored by observing the change of solution contact angle at different times. The experimental results show that the high-frequency electromagnetic field can slow down the scaling growth on the surface of heat exchange tubes by changing the morphology of scaling substances and the physicochemical properties of water. The cavity of the instrument is modeled and simulated by ANSYS Maxwell, and the three operating parameters, waveform, voltage and frequency, are changed respectively. The performance parameters of the cavity, such as magnetic field energy, electric field energy and magnetic flux, are calculated and compared, and then the more suitable operating parameters are selected to improve the performance of the instrument. The simulation results show that the high-frequency electromagnetic field generated by the anode rod in the axial position can be overlooked compared with the magnetic field energy. Square wave excitation produces greater magnetic field energy than using sine wave excitation, and as the voltage increases, the peak value of the magnetic field energy continues to rise and increases faster. With an increase in the frequency, the peak value of the magnetic field energy and magnetic flux peak will maintain a slight decrease over a certain frequency range. After this frequency range, the peak value of magnetic field energy and magnetic flux peak will decrease rapidly. This decrease is due to the relaxation caused by the change of the waveform direction. The influence of time and an increase in the frequency will significantly increase the influence of the relaxation time.
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Keywords:
descaling; electromagnetic fields; electromagnetic induction; frequency; voltage; waves
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MDPI and ACS Style
Zhao, Y.; Zhang, L.; Zhao, X.; Liu, J.; Gao, M. Research on Descaling Characteristics and Simulation Calculation of a Coaxial High-Frequency Electronic Descaling Device. Water 2021, 13, 789. https://doi.org/10.3390/w13060789
AMA Style
Zhao Y, Zhang L, Zhao X, Liu J, Gao M. Research on Descaling Characteristics and Simulation Calculation of a Coaxial High-Frequency Electronic Descaling Device. Water. 2021; 13(6):789. https://doi.org/10.3390/w13060789
Chicago/Turabian StyleZhao, Yan, Lixin Zhang, Xin Zhao, Jin Liu, and Ming Gao. 2021. "Research on Descaling Characteristics and Simulation Calculation of a Coaxial High-Frequency Electronic Descaling Device" Water 13, no. 6: 789. https://doi.org/10.3390/w13060789
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