Process and apparatus for reducing heavy metal toxicity in fly ash from solid waste incineration
US4977837A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1990 |
| Grant date | Dec 18, 1990 |
| Priority date | — |
| Expiry date | Feb 27, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/50
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A process and apparatus for the vitrification of fly ash produced from an incineration system for solid waste materials, including the combining of fly ash extracted from the pollution control device in the incineration system with fusible material, particularly glass, and preferably recycled glass extracted from the solid waste material before it is incinerated, and subsequently melting the combined glass and fly ash in a vitrification furnace in order to vitrify the fly ash and its toxic contaminants, including lead, mercury, cadmium and other heavy metals, to produce an inert vitrified ash product. The flue gas from the vitrification furnace is returned to the flue gas stream from the incinerator for introduction into the pollution control device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.