| Title |
A Study on Calcium Ion Reduction in Power Plant Water using High Voltage Impulse |
| Authors |
김태희(Kim, TaeHui) ; 장인성(Chang, In-Soung) ; 정재환(Jung, Jae-Hwan) ; 홍웅기(Hong, Woong ki) ; 이준호(Lee, June-Ho) |
| DOI |
https://doi.org/10.5370/KIEE.2017.66.3.545 |
| Keywords |
Calcium carbonate ; Scale ; High voltage impulse ; Softening |
| Abstract |
As an alternate technique for water softening, high voltage impulse (HVI) is introduced and verified if it can control the CaCO_3 scale formation in industrial water treatment. After HVI was applied to the artificial hard water containing 100pm5mg/L Ca^{2+} for 4 hours, the Ca^{2+} concentration and the electrical conductivity were measured. The concentration of Ca^{2+} was reduced from 94.5 to 86.3 mg/L (8.7% reduction) after 4 hour contact of HVI under 5 kV condition. The Ca^{2+} was decreased from 92 to 77.7 mg/L (15.6% reduction) at 8kV and from 90.1 to 75.4 mg/L (16.3% reduction) at 12 kV condition. Both of the contact time and the applied voltage were important parameters affecting the calcium ion reduction. With these results, it was verified that HVI technique could be potential candidate for control of CaCO_3 scale formation. |