Reciprocating scraper blade for moving sludge in settling basin in water purification plant, has lower surface forming a friction reducing wedge shaped compartment

摘要

The lower surface of the blade (20) forms a wedge-shaped compartment between the blade and bottom of the basin, generating a lifting force during the return movement of the blade in a fluid medium. The blade has a triangular cross-section presenting a vertical transporting surface, a downwardly facing surface and an upwardly facing surface.