M-GB - Peripheral Traction Bridges
From Production Machinery
Settling tanks, whose diameter is more than 5 meters and normally made in concrete, are provided with a peripheral traction bridge to recollect the settled sludge.
This bridge is made up of a strong , AISI 304 stainless steel framework of girders. It is pivoted on a bearing mounted on the central supporting column and is leant against the tank edge on a dragging trolley.
The dragging trolley is provided by a gear motor and rubber wheels leaning on the tank edge , which becomes the rolling track for the trolley itself.
The linear speed of the bridge on the track is around 1 m/min. On the bridge girder are anchored the steel deflection cylinder , the bottom scraper featuring a continuous , logarithmic curve – shaped profile and scrapers profiled in special rubber , as well as a skimming blade with a compensator tip to discharge the floating solids into the relevant scum box.
On the outer circumference of the tank are located the Thomson – profiled spillway rim to discharge the clarified waters and a fixed, scum stopping blade to hold back the floating substances.
The galvanized walking grate is fitted up with side parapets.