Operation
1. Boiler filling
The boiler is filled to the specific
level after the type of solvent
treated is adjusted (degree of
volatility and dirt).
2. Start of the distillation process
The oil is heated to the suitable temperature required to distil the solvent that has
been previously adjusted.
The vapours are extracted with a vacuum pump and transferred through an
air/water heat exchanger, where the recovered solvent condenses and is then
transferred to the clean solvent tank. The boiler is filled with unclean solvent while
the content of solvent in the boiler is distilled, maintaining the same levels inside the
boiler, as required to achieve the maximum exchange surface.
3. Depletion and unloading
The PLC calculates the total volume of solvent treated to achieve the optimal waste
levels. When this volume is reached, the system continues to distil the solvent, but it
does not continue feeding additional unclean solvent to the boiler.
Once the optimum volume of waste is reached, the system stops, the vacuum is
opened and the waste is unloaded into the waste tank.
The operation is supervised by the PLC at all times, controlling the levels and
temperatures.
