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Internally Fed Rotary Drum Screen is an internally fed screening
device with the flow being fed and distributed inside a screening
cylinder. It is widely used to separate settleable solids from
liquid in the municipal and industrial wastewater treatment plants.
Internally Fed Rotary Drum Screen can be designed to open type or
fully covered type according to the onsite working condition.
Two Types of Screens
Perforated Screens----provide a high capture rate of materials
bigger than the perforation size.
Wedge Wire Screens----minimize the risk of clogging and maximizes
permeability ratio with the V-shaped profile.
Working Principle
The rotary drum filter is mechanical filtration equipment,
including transmission device, overflow weir water distributor,
rinse water device and other significant components. The filter
drum is made of stainless steel wedge wire screen. The working
principle is that the treated water enters the overflow weir
distributor from the pipe mouth; after a short period of steady
flow, it evenly overflows from the water outlet and distributes the
filter drum that rotates in the opposite direction. The water flow
will generate a relative shearing motion with the inner wall of the
filter drum, with high water efficiency, in which the solid is
retained and separated, and tumbles by following the spiral guide
plate in the filter drum, and discharges from the other end of the
filter drum, and the wastewater filtered out from the filter drum
flows out from the side sink under the flow guiding of protection
cover from the right direction. The outside of the filter drum is
equipped with a flushing water pipe. It is sprayed with pressure
water (3Kg/m²) in a fan-shaped manner to flush and dredge the
filter mesh to ensure that it always keeps good filtering
capability.