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Noardling Hubert - Travelling Band Screen
A Hubert travelling band screen is the `heart` of the `screening train`, often used used for (sea)water intakes as part of power plants and desalination plants, where big tidal differences can also play a role. It is more compact than a (vertical) drum screen, but it has still a high capacity. Quite common flow rates are 15.000 m3/h per screen, depending on customer requirements and the local situation at the intake. A travelling band screen is typically installed in water intake systems downstream from coarse bar screens. Woven mesh with a diameter of approx. 2-10 mm is used as relative fine filter medium.
Travelling band screens require only a small installation area due to the vertical construction. This type of screen is used in places where the construction area of the total cleaning installation is limited or where big differences occur between water levels.
The band water screen operates on a conveyor belt principle. The `conveyor belt` is composed of mesh panels that are mounted between two endless heavy-duty transport chains. The chains are driven by two sprockets. The debris trapped on the screens is removed by spray water jets and discharged through a flushed chute. The drive unit, flushing mechanism and debris hopper are located at deck level. The upper section above deck level is fitted with a metal or reinforced polyester composite cover.
- Large flow capacity
- No debris carry-over
- High screening efficiency (99%)
- Minimal construction space required
- Big differences between water levels
- High quality and reliable
- Long lifetime (30 years or more)
- Resistant to abrasive water
- (Sea)water lubricated bearing
- Width: up to 4 m
- Pit depth: up to 20 m
- Skid or embedded configuration
- Mesh: opening 2/ 10 mm
- lnstallation angle: 70/90°
- Materials: (coated) carbon steel, stainless steel, (super) Duplex