Каталог

СТАНЦИИ, ОБОРУДОВАНИЕ И МЕХАНИЗМЫ ДЛЯ ОБРАБОТКИ ВОДЫ

PDRA

The degritting and degreasing suction bridge for rectangular basin is used on medium and large size wastewater treatment plants. The bridge consists of a mobile steel girder in standard section with walkway surface in galvanized grating, a couple of lateral trolleys in cold bent metal sheet suitably stiffened, a sand removal system, a couple of gear motors fitted on in correspondence of the bridge center line (one for the transmission of the bridge translation motion and the other one for the surface scraper movement), suitable weirs, elements for collection and overflow of the oily and surface-active substances, electric control panel, festoon power supply line. The sand extraction system, which provides for the sediment suction is directly driven by the bridge and can be with air-lift or with submersible pump type, as appropriate. In the first case the standard equipment comprises the air supply system with blower, valve, piping, solenoid valves and accessories while as far as the second type the electric pump complete with any items required for the operation will be supplied. The sand collection tank can be provided with a diffuser system for the aeration which facilitates the removal of the oily material and carries out a pre-aeration of the sewage.
The bridge, during the going stroke of its alternate motion, collects and removes any oily floating material by means of a surface scraper, while during the return, sucks the sands collected on the tank bottom. The protection against overloads is guaranteed by the use of electronic load limiting devices.
The standard construction is in carbon steel protected by hot dip galvanization. On request it is possible the production with metal parts in stainless steel or the protection with epoxy painting.

Strenghts

• SAND EXTRACTION SYSTEM OF SUCTION TYPE WITH AIR-LIFT OR SUBMERSIBLE PUMP.
• WHOLE SYSTEM DRIVEN BY THE BRIDGE.
• HIGH RESISTANT TRAVELING BRIDGE.
• MINIMUM POWER CONSUMPTION.
• POSSIBILITY OF SEWAGE PRE-AERATION.