Page 102 - ro membanes

4.3 OPEN INTAKES 85
FIGURE 4.10 Steel offshore intake tower.
one or more intake pipeline(s) or intake tunnels; an onshore intake chamber; trash racks; fine screens; source water intake pump station; electrical, instrumentation, and control equip- ment; and chemical feed equipment.
The inlet structure of offshore open intakes is usually a vertical concrete, copperenickel or steel well (vault) (Fig. 4.10) or wedge wire screen (Fig. 4.11) located 4e10 m (13e33 ft) above the floor of the water body and submerged between 4 and 20 m (13 and 66 ft) below the water surface, which is designed to reliably collect adequate amount of seawater that has a mini- mum content of debris and aquatic organisms.
FIGURE 4.11 Copperenickel intake wedge wire screen.