Process for treating liquid waste containing solid fine particles
US4415457A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 1981 |
| Grant date | Nov 15, 1983 |
| Priority date | — |
| Expiry date | Mar 12, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/919
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Backwash water containing radioactive cruds of a non-filter aid type filter of the primary cooling water system of an atomic power plant is treated by leading the backwash water directly, or supernatant obtained by removing coarse cruds by settling in advance, to a waste resin settling tank for backwash water containing waste ion exchange resin powder from filter-demineralizer of the condensation-purification system of the atomic power plant, mixing the backwash water or the supernatant with the backwash water from the filter-demineralizer in the tank, thereby allowing the cruds contained in the backwash water or the supernatant onto the waste ion exchange resin powder, and settling the crud-adsorbed waste ion exchange resin powder, thereby separating and removing the cruds from the backwash water from the non-filter aid type filter. Recycle of fine cruds can be eliminated with enhanced percent crud removal, and recycle time of backwash water can be shortened. Load on a concentrator can be reduced with reduced number of drums filled with radioactive waste.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.