Advanced overfire air system for NO.sub.x control
US5343820A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 18, 1993 |
| Grant date | Sep 6, 1994 |
| Priority date | — |
| Expiry date | Aug 18, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23C2201/101
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An advanced overfire air system for NO.sub.x control designed for use in a firing system of the type that is particularly suited for use in fossil fuel-fired furnaces and a method of operating such a furnace which embodies an advanced overfire air system. The advanced overfire air system for NO.sub.x control includes multi-elevations of overfire air compartments consisting of a plurality of close coupled overfire air compartments and a plurality of separated overfire air compartments. The close coupled overfire air compartments are supported at a first elevation in the furnace and the separated overfire air compartments are supported at a second elevation in the furnace so as to be spaced from but aligned with the close coupled overfire air compartments. Overfire air is supplied to both the close coupled overfire air compartments and the separated overfire air compartments such that there is a predetermined most favorable distribution of overfire air therebetween, such that the overfire air exiting from the separated overfire air compartments establishes a horizontal "spray" or "fan" distribution of overfire air over the plan area of the furnace, and such that the overfire air exit…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.