Processing mixed waste

Details Processing mixed waste Processing mixed waste

1991-07-22

1993-03-23

Silverman, Stanley S.

Liquid purification or separation

With heater or heat exchanger

Flow line connected in series with distinct separator

210182, 2101951, 210196, 210199, 210202, 210203, 210205, 210206, 210259, 210284, 210314, C02F 128, C02F 142

Patent

active

051961130

ABSTRACT:
Removing radioactive contaminants from liquid hazardous material such as oil, includes recirculating the material between a processing tank and a filter medium. The material is heated to increase viscosity during the circulation through the tank and filters. Chemicals including chelating agents are added to enhance the removal of the radioactive elements. Water is added to the processing tank or upstream, in a settling tank, to effect a water wash of the liquid hazardous material. A pre-filter stage upstream of the settling tank is followed by a mid-range filter stage in the recirculation loop with the main processing tank. A finishing filter stage is in the outlet from the main processing tank.

REFERENCES:
patent: 4681705 (1987-07-01), Robertson
patent: 4800024 (1989-01-01), Elfline
patent: 4853130 (1989-08-01), D'Angelo et al.
patent: 4855080 (1989-08-01), McConaghy et al.
patent: 4863637 (1989-09-01), Matsumoto et al.
patent: 4925597 (1990-05-01), Ganter
"Radioactive Decontamination of Waste Oil by Filtration, Centrifugation, and Chelation", Robertson et al., Nuclear and Chemical Waste Management, vol. 7, pp. 257-263 (1987).

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