GN Solids Control finished a package of Oily soil leaching solid-liquid separation system. The separation package is sold to customer in the Middle East for the contaminated soil treatment. The system is designed to treat the oily sludge and oily soil.
Below are the major separation modules included in the contaminated Soil Washing and Separation system:
Module 1: The vacuum transfer unit. There is a solids and sludge vacuum pump used for transferring the waste material from waste pit. The vacuum pump is a 100% air driven device, there is no electrical components. Hence, there is an air compressor to feed air for the vacuum pump. And there is an air tank equipped after the air compressor and before feeding air for vacuum pump.
Module 2: The pre-mixing and washing unit. There is a tank with heating pipes. The vacuum pump transfer oily sludge or oily soil into the tank. Water will be feed into the tank to dilute the sludge and oily soil. After this stage, there will be oil, water and sand mixture.
As the viscosity and density of oil sludge is normally high. It is very difficult or nearly impossible for separation. There is a heating system used for together with the heating pipes for heating the oily sludge. The most suitable temperature is 70℃ ~ 80℃, which is the most suitable temperature to keep the activity of chemicals.
Module 3: Coarse shake separation unit. The coarse shale shaker is to pre-separate the big particles and sands from the oily sludge. As the solids contents are very high. The big opening PU screens are used in the shaker for longer service time.
Module 4: The decanter centrifuge separation unit. It is used for liquid and solids separation.
Module 5: The 3-phase separation unit for oil, water and solids separation. 3-phase centrifuge are used in the unit.
Module 6: Chemical dosing module. Chemicals are used nearly in all process. There is a skid mounted chemical dosing unit in the system to supply chemicals.