MULTI RACK SCREEN

Mechanical Multi Rake Bar Screen is a mechanically cleaned screen suitable for inlet works of treatment plants, pumping stations and inlet water structures. The screen captures solid materials which otherwise would be harmful to the following process and to the downstream equipment.

Operation:

Thus the operation can be adjusted to the incoming flow. A level sensor is installed in the channel in front of the screen. The screen starts when a pre-set water level is reached and operates until the water level is below the pre-set value. The cycle is repeated when the level is reached again. In operation, sewage flows though the inclined screen, approaching from the upstream side and after passing through the screen, departing on the downstream side. The screen is periodically raked by a mechanized comb system which is actuated either by level switches mounted in the channel upstream of the screen or by time clock. A doctor blade at the top of the comb travel removes the screenings collected by the moving combs. The moving combs are suspended between two endless side chains, which are driven through a head shaft, and sprockets. The gear motor and moving comb system is protected from damage caused by jamming by a torque overload coupling with a micro switch. The screenings removed from the doctor blade drop onto a skid plate, which transports the screening down to a container, belt conveyor or sluice pipe.

Benefits:

Fine to coarse screen with low head loss
Removal of extremely high screenings loads
Low height above operating level
Frame-mounted bar rack for exact rake engagement and reliable cleaning
Mechanical overload-prevention and automatic reversion
Independently replaceable rake bars and blade sections
Typical applications:

Slaughterhouses
Sewage treatment
Rendering plants
Food Industries
Dairies
Dye works
Pulp and paper industries
Oil factories
Technical specification:-

Discharge height 1.5 to over 10m
Installation angle 70° - 75° - 80°
Screen channel width 400-3000mm
Screen opening 5-50mm
Rake speed 4-8m/min