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EM40B - VORTEX GRIT AND OIL REMOVAL SYSTEM

Application Grit and oil removal from municipal and industrial waste water.
Characteristics The system is made up of a separation cylinder, air diffusers and an air-lift.
Operation The water to be treated goes through the grit removal system with a tangential flow; the grit which sediments on the bottom is lifted by an air-lift. The oily substances which float due to the effect of the air blowing are evacuated by means of a valve, normally with a manual control.
Materials Compact equipment in hot dip galvanized carbon steel or stainless steel.
Installation In a concrete tank.
Tank diameter From 1000 to 5000 mm.
Separation Grit particles larger than 200 microns.
Advantages It is equipped with oil removal system.
Disadvantages Limited capacity of treatment

 

OPERATION DESCRIPTION

The water flows into the grit removal tank in a tangential way. The tangential flow helps the grit particles sedimentation on the tank bottom.
Normally the suspension remains in the tank more than 30 seconds.
The flotation of the organic substances is due to the air blowing.
The grit is lifted by an air-lift and is conveyed to a mechanical separator or to a simple draining and filtering bed.
The oils flow together outside the separation ring and are regularly removed by means of a manual blade or gate valve.
The grit removed is clean enough thanks to the separation of the organic substances due to the effect of the air blowing.

To avoid the arising of decomposition phenomena due to the inevitable presence of organic material, a certain number of washings by water are necessary before extracting the grit.

 

TECHNICAL DATA
1.1 Waste water delivery to the grit removal system :m³/h (*)
1.2 Useful diameter :mm.  
1.3 Water and sand flow rate in the air-lift :m³/h (*)
1.4 Air-lift size :DN.  
1.5 Air flow rate :Nm³/h  
(*) to be advised when asking for a quotation