| Title |
Old Service Pipe Cleaning of Air - Pulse Wave and Cleaning Chemicals |
| Authors |
이현동(Hyun Dong Lee),배철호(Chul Ho Bae),박정훈(Jeong Hoon Park),신현준(Hyun Joon Shin),조정식(Chung Sik Cho) |
| Abstract |
It was estimated that cleaning effect in old service pipe by cleaning methods such as air pulse waves and cleaning solution (Disinfectants and Chemical cleaning solution) in the study. The results of cleaning experiments by air pulse waves showed that cleaning efficiency didn`t influenced by both increase of flow rate in pipe and hydraulic cross section and was about 0.8%. Cleaning experiments of batch system by cleaning solution alone also showed that hydraulic cross section was a little smaller in the same condition, the cleaning efficiency of cleaning solution in service pipe was more increased. And the cleaning efficiency of chemicals cleaning was a little higher than solution disinfectants (O₃, H₂O₂, MIOX). Hydraulic cross section by Carela-Bio-Plus of both chemical cleaning solutions was increased at 14%. The cleaning efficiency of Carela-Bio-Plus also was higher than any other cleaning solutions in loop system. Especially, cleaning efficiency of ozone was higher than Carela-Bio-Plus Forte, and the results showed that ozone was thought to depend on pH. In case of cleaning by air pulse waves with cleaning solutions together, hydraulic cross section of old service pipe was more increased from 0.08% to 2.8% than cleaning of cleaning solutions alone. Amount of scale in old service pipe also was decreased from 0.11g to 9.82g. And it was thought that cleaning efficiency by both ozone and chemical cleaning solutions usually was higher in strong acidic solution. Therefore neutralization treatment by alkaline solution should be required after pipe cleaning. Also those cleaning solution, especially their odors and gas, are known as lethal chemicals for humans. So the disposal of their odor and gas were thought to be very important for feasible application of pipe cleaning. |