Method of cleaning contaminated soil

Details Method of cleaning contaminated soil Method of cleaning contaminated soil

1986-03-25

1987-03-10

Favors, Edward G.

Furnaces

Process

Incinerating refuse

110236, 110245, 241DIG10, F23G 500

Patent

active

046483322

ABSTRACT:
A method of cleaning contaminated soil which achieves very low levels of residual impurities and does not produce contaminated residues is characterized by the steps of, (a) feeding the contaminated soil to a combustion space (6) of a fluidized bed furnace (4) having, at the underside of said combustion space, a structure (5) for air distribution, (b) forming a fluidized bed of the contaminated soil above said air distribution structure (5) in the combustion space by means of combustion air delivered under elevated pressure via the air distribution structure, and (c) mainly or completely burning the impurities from the soil in the combustion space (6), to provide cleaned soil. Preferably the air distribution structure (5) comprises a generally horizontal grid (7) of pipes having air distribution nozzles with gaps between the pipes, coarse soil particles passing through said gaps into a collection space (13) from the combustion space.

REFERENCES:
patent: 4429642 (1984-02-01), Deve
patent: 4487372 (1984-12-01), Deve
patent: 4491277 (1985-01-01), Baur et al.
patent: 4493636 (1985-01-01), Haldipur et al.
patent: 4569696 (1986-02-01), Sandstrom et al.

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