Scraping assembly having angularly offset scraper blades for removing solids from an imperforate bowl centrifuge

A centrifugal separator system for separating the solids component of a feed material at a high speed, comprising:

• a bowl having an interior wall surface and being rotatable about a vertically disposed longitudinal axis, said bowl being adapted to receive said feed material, said interior wall surface being adapted to collect said separated solids component;
• and
• a support shaft having a longitudinal axis, said support shaft supporting at least two longitudinally spaced scraper blades, said scraper blades being adapted to contact and remove said collected solids component of said feed material from said interior wall surface so that said solids component may freely drop longitudinally through said bowl and into a collection area;
• said support shaft being pivotable about an axis laterally spaced from said longitudinal axis of said support shaft between a stowed position wherein said scraper blades are positioned remote from said interior wall and an operational position wherein said scraper blades are in contact with said collected solids component located against said wall surface;
• said scraper blades being angularly offset with respect to each other so any of said solids component removed by an upper blade of at least two of said blades may freely drop along said longitudinal axis without interference with a lower of said two blades.