Direct contact raining bed counterflow cullet preheater and method for using
US4875919A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 1988 |
| Grant date | Oct 24, 1989 |
| Priority date | — |
| Expiry date | Apr 13, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/57
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An improved method and apparatus for preheating cullet used as feedstock for a glass furnace. A direct contact raining bed is described through which cullet is fed by gravity flow, with furnace flue gases as combustion products of a separately-fired heater passed in counterflow to heat the cullet by direct contact. The preheater includes deflectors to retard passage and increase the path length of cullet flowing through the raining bed, and the deflector plates are mounted at specific declination angles and have their geometric parameters selected to optimize cullet residence time. Glass furnace systems are described which include the raining bed cullet preheater in series and parallel flow relationships with a glass batch preheater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.