Reburning glass furnace for insuring adequate mixing of gases to reduce NO.sub.x emissions
US5795364A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 1995 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Nov 1, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/50
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A mixing method insures adequate mixing of gases in a glass furnace that employs a reburning process. Because of the mixing method, a novel glass furnace can be constructed that strikes an optimum balance between a reduction in nitrogen oxide (NO.sub.x) emissions and the cost of the reburn process, particularly, the number of requisite reburn and overfire air jets as well as reburn fuel. The glass furnace is constructed as follows. A combustion housing defines a primary zone for receiving combustible fuel, a reburn zone connected to the primary zone for receiving exhaust from the primary zone and reburn fuel to generate a first gas mixture. A burnout zone is connected to the reburn zone and receives the first gas mixture and overfire air to generate a second gas mixture. In accordance with the mixing method, one or more reburn jets provide reburn fuel to the reburn zone so that the fuel stoichiometric ratio observed at multiple locations in a first measurement plane of the first gas mixture residing substantially at an exit to the reburn zone is characterized by a first coefficient of variation (COV) that is about 0.4, and further, one or more overfire air jets provides air to the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.