AUSBRINGUNG VON SCHWEBSTOFFABSÄTZEN AUS ÖLTANKS

摘要

In a process to remove impurities from crude oil, the oil is stored in a large-volume tank with an inverted asymmetric base cone whose deepest point is off-center. Sediment and other heavy substances e.g. water are removed from the deepest point by a helical worm extractor and shut-off valve. The asymmetric conical structure is a permanent modification fabricated in acid-resistant concrete joined to the tank wall by a sheet steel skirt. Oil extracted is returned to the tank.