Agitated Mixing Tank: the Cone-Bottom Light-Oil Agitator (Bell, 1923)

The refinery agitator for washing oil with acid, soda and water: a lead-lined riveted steel tank with a cone bottom, an air line that blows up through the charge to mix it, a spray header for wash water, and draw-offs at the tip of the cone for sludge and finished oil. Variable: capacity, 160 to 5,000 barrels. Bell's Fig. 87 is 1,000 barrels: 25 ft inside diameter, 25 ft shell, 7 ft 6 in cone, 32 ft 6 in overall. Source: H. S. Bell, American Petroleum Refining (1923), pp. 195-200. Unknown: plate thickness. Picture: Fig. 87 of the book.