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Expertise : Machines > Pre-treatment >
Screening
Return to the pre-treatment
Pre-treatment
- Screening
- Sieving
- Screw conveyors
- Compactors
- Sand washer Mechanical bar screen - DCV series
The
DCV bar screen is a mechanical fully automatic screen used for liquid /
solid seperation in the pre-treatment stage of wastewater treatment
plants pumping station...
Application and operation of the mechanical bar screen :
- Automatic operation,
- During start-up, the rake comes down by deviating from the plan of scraping,
- The rake slides on the external porfiles of the frame till reaching the point of fall,
- In the point of fall, the rake closes in the low point of the grid, in the contact of this one,
- By going back up, the rake pulls the waste accumulated along the grid,
- In the high point, the ejecting device evacuates the waste automatically.
Inclined bar screen - DCI series
The
DCI bar screen is a mechanical fully automatic screen used for liquid /
solid separation in the pre-treatment stage of wastewater treatment
plants, pumping station...
Application and operation of the inclined bar screen :
The
inclined bar screen starts and stops automatically according to the
water level difference betwee upstream and downstream by means of level
sensor or by timer lock.
The DCI bar screen includes a screen frame,
a bar rack (grid), a bar dead plate, a series of chain driven rakes and
a drive unit. All bearings and critical parts are above liquid level at
all times to facilitate lubrification and improve machine life. The
humber of rakes depends on the screen lengt and type of effluent.
Screening
Fine screens are used to separate solids from urban or industrial
wastewater.
Application and operation of the fine screen :
ROTOSCREEN and MONOSCREEN (fine screens - manufactures
by MEVA) are constructed as an alternating assembly of fixed
and moving blades- comparable with an escalator.
With each rotation, the action of the moving blade, elevates
the screened product to the next step. This function is repeated,
" step by step " until the product reaches the discharge
point at the top of the screen.
The operation is cyclic and is usually regulated by variations
in upstream water levels caused by progressive " blinding
" of the screen face.
The degree of screening can be from 1 to 6 mm.
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