| 摘要 |
A freezing cell (250) having one or more freezing tines may be used to remove contaminated sediment from the beds of water bodies. The freezing tines (245) are to be immersed into the sediment. Refrigerant (Rf) is supplied to the tines (245) by a refrigeration unit during the freezing cycle to solidify the surrounding sediment into a block (230) held by the cell (250). The block (230) of frozen sediment is lifted from the water body. The block (230) is released from the freezing cell by heating the tines (245). The block (230) is then transported for treatment. The freezing cell (250) may be returned for reuse in sediment removal. The freezing cell (250) may be configured to permit close placement of the cell (250) 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. |
