| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cleaning apparatus suitable for removing clogging substances trapped on a surface layer of a sand filtration layer. <P>SOLUTION: The cleaning apparatus 11 includes drive wheels 12 as a movement means for moving over the surface of the sand filtration layer. A pump 13 and a jet nozzle 14 are provided as a stirring means for stirring the necessary depth of the surface layer of the sand filtration layer and stirring up the clogging substances along with filter sand into the seawater inside a turbid water suction pit 20. A perforated suspended water suction tube 15, a pump 16, an ejector 17 and a dilute suspended water discharging tube 18 are provided as a suction and discharge means for sucking the turbid water stirred up into the seawater inside the turbid water suction pit 20 by the stirring means and discharging the turbid water to outside of the turbid water suction pit 20. The cleaning apparatus prevents clogging by timely cleaning of the sand filtration layer and can maintain high seawater infiltration rates. Since the turbid water containing the clogging substances, which is stirred up into the turbid water suction pit 20, is sucked and discharged to outside of the system, effects on the surrounding environment are also reduced. <P>COPYRIGHT: (C)2013,JPO&INPIT |
