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Control of scale formation using high voltage impulse

고전압 임펄스에 의한 스케일 제어

  • Received : 2014.12.02
  • Accepted : 2015.03.12
  • Published : 2015.03.31

Abstract

The aim of this study was to evaluate the feasibility of application of the high voltage impulse (HVI) technique to the control of scale formation by calcium carbonate, which is pointed out as an important issue in industrial water treatment. The HVI system consisted of the power supply, high voltage generator, capacitors, switch and impulse generator was designed and made in laboratory scale, which can make 17kV impulse. HVI was introduced to the reactor that was filled with synthetic water containing $Ca^{2+}$ion. The concentration of calcium ion decreased only 3.0% after 5 minutes of contact time. However, it decreased up to 13.7% after 60 minutes of HVI contact time. Temperature and pH increased but conductivity decreased due to precipitation of the calcium carbonate. Although the decrease in concentration of calcium ion was not sufficient, it was verified that the HVI technique could be applicable for the softening and desalting processes.

Keywords

Calcium carbonate;Desalting;High voltage impulse;Scale formation;Softening

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Acknowledgement

Supported by : 한국연구재단