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Sandvirodrip

Sand classifier

Envirotrap sand classifiers fulfill the function of sand separation coming from the sand trap of pretreatment of sewage treatment plants.
The settled sand, still wet, are pumped back or air-lifted to be transferred by piping to the settling tank of the Envirotrap sand classifier.
The tank volumes of each model are sized for predefined maximum flow rates. This is done in order to respect the residence times and the decantation speeds, guaranteeing the separation of more than 90% of the particles greater than 200 microns.
1
4
2
3
4
Layouts
1

Effluent inlet

2

Effluent outlet

3

Drain

4

Sand discharge point

Specificities
  • 90% particles separation efficiency
  • Over 200
  • Easy installation
  • Small footprint/closed unit
  • Easy maintenance
  • Low maintenance costs
  • Reliability and durability
Settling

The connection to the tank is by flange.

A siphoid partition inscribes the course to be carried out by the effluent in order to match, with respect to the volume of the tank, the hydraulic decanting rules. An internal overflow collects treated water and directs it to the outlet  flange.

Sand extraction

The extraction of the sand is carried out by a shaftless screw made of special hardened steel. The screw lays on bars spaced apart. Beyond the guiding effect that these bars performed, they also ensure the drainage of the water during sand lifting in the emerged area of the screw. The sands thus drained can be discharged into a container.

Performances
Flow rate (m3/h)
ModelERS 15ERS 30ERS 50ERS 75ERS 100
Sand capture rate: 90% > 200 microns15305075100
Material

Construction in stainless steel 304L or 316L

Screw in special steel high resistance

Dimensions
Overall dimensions in mm
ModelsERS 15ERS 30ERS 50ERS 75ERS 100
Length38004500500055006500
Width12501800200023002400
Height20002200240026003000

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