Method of dredging via freezing and removing sediment

Details Method of dredging via freezing and removing sediment Method of dredging via freezing and removing sediment

1994-12-15

1997-06-10

Popovics, Robert J.

Excavating

Processes

37307, 37210, 37747, 37774, 210747, 210774, 405130, 405303, 62260, 165 45, E02F 100

Patent

active

056364571

ABSTRACT:
A freezing cell having one or more freezing tines may be used to remove contaminated sediment from the beds of water bodies. The freezing tines are to be immersed into the sediment. Refrigerant is supplied to the tines by a refrigeration unit during the freezing cycle to solidify the surrounding sediment into a block held by the cell. The block of frozen sediment is lifted from the water body. The block is released from the freezing cell by heating the tines. The block is then transported for treatment. The freezing cell may be returned for reuse in sediment removal. The freezing cell may be configured to permit close placement of the cell to other like cells used in the extraction process. A method of freezing marine sediment into blocks is used to recover contaminants from water bodies.

REFERENCES:
patent: 1704577 (1929-03-01), Pomykala
patent: 3614874 (1971-10-01), Martindale et al.
"Great Lakes Clean Up Fund, Sediment Removal Program" by Environment Canada, dated Jun. 1994.
"Cleanup Fund, Contaminated Sediment Removal Program" by Environment Canada .

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