Patent ID: 9079143
Filing Date: 2015-07-14
Classification: B01F,B02C,B08B,B09B,B60P,B65G,F23G

Abstract:
1. A method for removing substance including solid constituents from a refinery tank, the method comprising: inserting a mixing apparatus into an opening at a top of a refinery tank, wherein the mixing apparatus includes an agitator connected to an elongated and rigid agitator support; securing the agitator support to a connector located at a periphery of the opening in order to secure the agitator at a first depth in the refinery tank; mixing the substance in the refinery tank with the agitator; pumping the mixed substance from the refinery tank through the agitator support; suspending the mixing and pumping; un-securing the agitator support from the connector; lowering the agitator to a second depth deeper than the first depth; re-securing the agitator support to the connector; and resuming the pumping and mixing with the agitator at the second depth, wherein the agitator support includes a plurality of sections, and wherein lowering includes detaching adjacent sections from each other, forming a gap between the adjacent sections, and securing an additional section in the gap.