The OEM have been cleaning oil contaminated sand for many years. Their treatment plants deliver 120t+ per hour of oil contaminated sand. The technology has been greatly improved over the years, but the core principles remain the same:
- Use as little chemistry and heat as possible
- Use the OPS high pressure scrubber (AEV)
- Remove oil throughout the process
- Clean the sand
- Clean the fines
- Recombine to give a soil
How does the Pinch Valve assist with this application?
The Pinch Valve follows a sand cleaner holding material back at a static head of 10m, and releases clean, ambient sand from the base of an up-flow classifier which floats off oil and fines. The valve is installed vertically, in the normally closed position under an up-flow classifier. The operating pressure is 2.5bar.
The up-flow classifier is an effective device in solving the problems of gravitational methods of enrichment of quartz sands.