Rotary Drum Screen
An innovative, rotary drum type fine bar screen for sewage and effluent treatment plants.
APPLICATION
Is the most advanced fine rotary drum screen now available in India. Screens are highly recommended as primary screening equipment in municipal sewage treatment plant and effluent treatment plants of various industries like Food processing, Rayon and textiles, Paper and pulp, Pharmaceuticals, Tanneries, Slaughter houses and so on.
WORKING
Is installed at an inclination of 35° with the horizontal in to the channel of treatment plant. The wastewater flows in to the open end of the wedge wire drum. While the filtered wastewater comes out from the sides of the drum passing though the wedge wire, the solids of the size more than the bar spacing are retained on the surface of the drum itself.
Owing to the blockage by the retained solids, the water level increases on the upstream of the screen. When the water level reaches to the pre-determined level, by virtue of the signal transmitted to the drive, the raking arm mounted on the drive shaft starts rotating. The comb mounted on the raking arm sweeps the drum and deposits the solids on to the collection trough at the center of the drum. The high-pressure water jet assists the deposition.
From the trough the solids are conveyed to the washing and compaction zone where high-pressure water jet washes the solids and removes the soluble component. The water used for washing containing soluble components is sent back to the wastewater stream though the pipe.
The washed solids free of faces are dewatered by squeezing in the compaction zone before the solids are finally discharged in the container or on to the belt conveyor from the discharge point.
SLOT WIDTH :
Slot width range from 1 to 6 mm.
MATERIAL OF CONSTRUCTION :
To prevent from corrosion and to provide longer life fine screens are completely made from stainless steel AISI 304 grade as standard. Other grades of stainless steels are available up on request.
ADVANTAGES :
- Rugged mechanical construction - Very long life.
- Compact design-Low space requirement.
- Inclined at 35 Deg- Increased operational efficiency.
- Completely made of stainless steel- Very long life.
- Higher capture rate - Ability to handle diverse waste.
- Self cleaning- No entrapment of solids.
- Minimum moving parts-Lower wear and tear, minimum maintenance, Long life.
- Simple installation and operation.
- Factory assembled and movement tested- Faster erection.
- Usage of V- wedge wire- Efficient removal of waste, low head loss.
- In built washing and compaction-Very hygienic and reduced weight of waste.