Patent · US Active

Floating filter media filtration system with backwash

US10407317B2 · kind B2 · utility

4Cited by
2References
8Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJan 18, 2012
Grant dateSep 10, 2019
Priority date—
Expiry dateOct 10, 2032

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC02F2201/005
  • WIPO fieldChemical engineering
  • WIPO sectorChemistry

Abstract

The filtration system of the present invention comprises first and second filtration tanks. The first filtration tank has a first floating filter media layer, a first upper screen with a first aperture ratio, a first inlet, a first backwash water supply source, and a first backwash water outlet means. The second filtration tank has a second floating filter media layer, a second upper screen with a second aperture ratio, a second inlet, an inflow blocking mechanism capable of blocking inflow of water to be treated through the second inlet, a second backwash water supply source, and a second backwash water outlet means. The first aperture ratio is smaller than the second aperture ratio.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.