Fuel tank cleaning method

Details Fuel tank cleaning method Fuel tank cleaning method

2011-06-14

2011-06-14

Barr, Michael (Department: 1711)

Cleaning and liquid contact with solids

Processes

Hollow work, internal surface treatment

C134S022100, C134S022180, C137S015040, C137S590000

Reexamination Certificate

active

07959741

ABSTRACT:
A method for cleaning the interior surfaces of a fuel storage tank. The first step of the method is to extract a material sample from the bottom of the fuel tank to determine how thoroughly the tank must be cleaned. The clean fuel is then removed from the tank and is stored in a holding tank. Loose and liquid contaminants are then vacuumed out of the tank. Next, a self-propelled spray nozzle, a sprayer tube, and a rotating spray nozzle, each of which is connected to a pressurized water supply line, are successively lowered into the fuel tank and are used to scour the various interior surfaces of the tank with pressurized water while wash water and loosened contaminants are simultaneously vacuumed out of the tank. The interior of the tank is then dried, and the clean fuel stored in the holding tank is pumped back into the fuel tank.

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