UTICA, NY —A new, compact Rotating Drum Screen from Munson Machinery removes solids from industrial and municipal waste streams, and recovers solid product from process streams, at rates from 200 to 930 gal/min (757 to 3,520 liter/min) depending on screen size, without blinding or clogging the screen, according to the company.
The stainless steel unit, Model 24-RDS-24, is comprised of a 24 in. (61 cm) diameter x 24 in. (61 cm) long rotating cylinder with durable 2 mm wedge-wire screening that allows liquid/solids separation at a rate of 870 gal/min (3,293 liter/min), a variable speed drive, head box, discharge chute and support structure, reducing floor space and headroom requirements compared with non-rotating equipment of equivalent capacity.
Solids-laden effluent discharges from the head box and overflows a weir, flooding the entire length of the variable speed, rotating wedge-wire drum screen. Solids deposited on the screen gravity-drain through slotted apertures to moisture levels in the 20 percent range before being removed by a doctor blade and discharged through a chute.
Liquid passing through the screen falls onto an internal baffle that concentrates the flow, forming a full-length water knife that impinges against the underside of the screen, dislodging any solids blinding the screen. An optional clean-out spray line removes exceptionally oily, greasy, fibrous or resinous matter trapped in screen apertures.
Powered by a ¾ HP (0.55 kW) wash-down duty motor, a variable-speed drive allows adjustment of drum rotation speed to achieve maximum dewatering effectiveness.
The wedge-wire screen of the cylinder is also available in apertures from .002 to .110 in. (50 micron to 2.75 mm).
The rotating drum is the only moving part, minimizing initial cost, operating cost and maintenance.
Models with drums 24 in. (61 cm) in diameter are offered in lengths of 36, 48, 50, and 72 in. (91, 122,127, and 183 cm). Models with drums 36 in. (91 cm) in diameter are offered in lengths of 96 and 120 in. (244 and 305 cm) and separate solids at rates from 800 to 4,650 gal/min (3028 to 17,600 liters/min).
Typical applications include: separation of various solids and sludges from municipal and industrial wastewater, food processes, pulp and paper production and rendering processes; removal of extruded pellets from cooling baths; and separation of debris from any variety of plant and equipment cleaning processes.
Munson's new 24 x 24 in. (61 x 161 cm) Rotating Drum Screen is self-cleaning, separating solids and sludges from waste streams at rates to 870 gal/min (3,293 liter/min) without clogging or blinding.
