Patent ID: 9345993
Filing Date: 2016-05-24
CPC Classification: B01D,C02F,E02B,E02F,E03B,Y02W

Claim Text:
1. A cleaning apparatus which prevents clogging by removing clogging substances which accumulate or are trapped in a surface layer of sand filtration layer which is utilized to perform osmotic intake of seawater, the cleaning apparatus comprising: a submersible self-propelled motorized driving device configured to move across the surface of the sand filtration layer by drive wheels, a cover frame which encloses an entire cleaning apparatus; a seawater current agitation device which is front located in a forward direction of movement of the cleaning apparatus and is enclosed within the cover frame, configured to agitate only a surface layer portion of the sand filtration layer at a desired depth as the cleaning apparatus advance forward by suctioning and blowing same surrounding seawater to stir currents upward the clogging substances trapped in the sand filtration layer together with the filtration sand of only the surface layer portion to form a turbid water mixture which is collected in a turbid water intake pit, wherein the turbid water intake pit is enclosed within the cover frame and is located behind the seawater current agitation device, and a seawater suction and discharge device which is rear located at the cleaning apparatus behind the turbid water intake pit and is also within the cover frame, configured to utilize a differential settling rates between the clogging substances and the filtration sand to selectively suction and pump out most of the clogging substances in the turbid water mixture in the turbid water intake pit, and afterwards, pump and discharge the clogging substances to the seawater outside of the cover frame.