Compact rotating drum filter

GRSIS

CATEGORIA PRESE D'ACQUA
TIPOLOGIA FILTRI

WHEN TO USE IT

The GRSIS is a small rotating drum filter which is particularly suitable for the filtration of small flow rates (some hundreds of m3/h) of wastewater to be purified, sea, lake or river water, destined for industrial processes, potabilization, irrigation or production processes in general.

HOW IT IS MADE

The machine has an external shape of a parallelepiped completely closed and compact and it is essentially composed of: a closed sturdy structure steel sheet which acts as a container for the whole components; a horizontal cylinder stiffened by means of steel profiles arranged in a radial pattern, suitable for to have a large free cylindrical surface which is at the same time very robust and able to withstand heavy loads such as rotation in water and the thrusts of the hydraulic flow; a series of filtering panels bolted to the above structure and easily removable, each panel consists of a frame and a filtering panel in square mesh or perforated sheet; a fixed shaft supporting the entire structure; two sturdy supports mounted on the sides of the drum and equipped with special self-lubricating bushings for continuous operation even in water, suitably sized to support the drum during rotation with respect to the fixed shaft; a gearmotor with cylindrical gears for the rotation of the drum by means of a pinion which meshes with the rack; a counter-current washing bar of the filtering surface, from the inside to the outside, complete with high pressure nozzles; a hopper for collecting the removed material and washing water; a sealing system composed of gaskets mounted between the rotating drum and a fixed part constituted by the container wall. Protection against overloads is guaranteed by standard dynamometric devices or, on request, by electronic absorption limiters. The simplicity of its design and the fully automatic cleaning allow this unit to always guarantee high performance and reliability over time.

HOW IT WORKS

The water flow enters in an axial direction with respect to the drum through a flanged connection; the flow of water to be filtered crosses the cylindrical surface, made up of filtering panels, from the outside to the inside. The water recombines after filtration and continues its motion along the axis of the drum to exit from the container through a flanged connection. The screened material held on the outside of the filter is pushed into a hopper by the washing water which sprays from the inside to the outside of the drum and flows out also by means of a flanged connection. The machine is also a provided with a filter on the washing water pipe, an overflow flanged connection, a bottom discharge and an electrical control panel.