US 4,424,081 AGranted

Reconditioning soils contaminated by crude oils or other refined petroleum products

OwnerMarcel L. Giguereinventor

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Abstract

A method for reconditioning soils contaminated with crude oils or other refined petroleum products. The system comprises a mixer input device for mixing and heating the soils with a liquid and providing a heated blended slurry. A sparger kiln agitates the slurry to break down its component parts into a fine particle slurry. A first clarifier washes the fine particle slurry to effect a first separation of oil particles from the slurry. A network of flotation cell units further wash and agitate the fine particle slurry from the clarifier to effect a second separation of oil particles from the fine particle slurry. A reagent is added to the flotation cells to effect the oil separation. An aeration clarifier further separates the oil particles from the liquid mixture elected from the flotation cell units. A collecting system is provided to recover the oil particles separated from the first clarifier and the aeration clarifier.

Claims7

Dependent claims

A method of reconditioning soils contaminated with crude oils or other refined petroleum products to separate constituent parts of said soils, said method comprising the steps of,

(i) mixing and heating said soils with a liquid to provide a heated blended slurry at an input stage,
(ii) conveying said blended slurry to a sparger kiln of a further stage for further agitating and heating said blended slurry to provide a fine particle slurry,
(iii) further conveying said fine particle slurry to another stage for washing said fine particle slurry to effect a first separation of oil particles from said slurry,
(iv) further conveying said slurry to a further stage for further washing said slurry in flotation cell units to effect a second separation of oil particles from said fine particle slurry,
(v) collecting said liquid mixture with said oil particles,
(vi) further conveying said mixture to a still further stage for subjecting said collected liquid mixture to an aeration clarifier action for separating said oil particles from said mixture,
(vii) collecting said oil particles recovered in steps (iii) and (vi), and
(viii) collecting said mixture which has been substantially decontaminated from said oil and other contaminated materials for safe disposal thereof.

5 more elements

Dependencies are inferred from the claim text.