Abstract
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.
Highlights
Use electronic anti-fouling (EAF) instead of highfrequency electronic descaling device description, which is mentioned in the introduction
Through the experimental study of high-frequency electronic descaling instrument, it is observed that the growth of dirt is effectively inhibited by a high-frequency electromagnetic field, and the micro morphology of dirt and the physical and chemical characteristics of water are studied
The magnetic field energy, electric field energy, magnetic induction intensity and magnetic flux are selected as the performance evaluation indexes
Summary
The mechanism of scale inhibition and descaling by high-frequency electromagnetic fields is still controversial [20,30], but its effectiveness is undoubtedly confirmed and many scholars have observed changes in the crystal morphology and changes in the physical and chemical properties of aqueous solutions in experiments [15]. The energy of the electromagnetic field provides the necessary energy for crystal nucleation and improves the water activity, while the higher magnetic induction intensity inhibits the crystal growth This type of electronic descaling device can be manufactured through the design of electronic circuits and the installation of electrical components. ANSYS Maxwell is used to model and simulate the cavity of a coaxial high-frequency electronic descaling device and to explore the influence of the operating parameters on the cavity performance. Through experimental research and simulation calculations, a more comprehensive analysis of the descaling characteristics of the high-frequency electromagnetic fields has been carried out
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