Method and apparatus for waste vitrification
US7120185B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 31, 1991 |
| Grant date | Oct 10, 2006 |
| Priority date | — |
| Expiry date | Oct 30, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S422/903
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A waste vitrification apparatus (10) having rotatable mixer impeller (16) functioning as a shaft electrode (60) and metallic vessel (14) functioning as a vessel electrode (62). A stream (12) of waste material and vitrifiable material are mixed and melted in the vessel (14) for vitrification. The waste vitrification method converts a feed stream (12) by mixing the feed stream into a glass melt (13) and melting glass batch of the feed stream (12) to form a foamy mass. The stream is dispersed by the impeller (16) to form a foam which is then densified in a settling zone (22), recovered through a spout (24) and solidified in storage containers. Means are provided to adjust the location of the mixing impeller (16) in the vessel (14) to change the depth of the settling zone (22). The impeller (16) is mounted on a drive shaft (18) having a recirculating coolant flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.