Final Report: No{sub x} Emissions from By Product Fuel Combustion in Steel Making, September 15, 1996 - October 15, 1999
Exhaust gases from the primary operations in the steel making process are almost exclusively utilized as supplemental fuels within the steel plant. These by-product fuels include blast furnace gas (BFG) and coke oven gas (COG) which contain mixtures of H{sub 2}, CO, CH{sub 4} and trace amounts of some heavier hydrocarbons and the impurities NH{sub 3} and HCN. These fuels are burned alone or in combination with natural gas to fire the coke ovens, blast furnace stoves utility boilers and metal working furnaces. The utilization of these by-product fuels reduces the waste gas emissions at the steel mill and reduces the requirements for outside fuel sources. However, as with primary fuel sources, the combustion of these by-product fuel blends does produce hazardous pollutants, in particular nitrogen oxides, and because these are atypical fuel blends of varying composition, the pollutant formation is not well understood. The objective of this research was to develop an understanding of the mechanisms controlling NO{sub x} formation from the combustion of by-product fuels from the steel industry and investigate control and design options to minimize emissions. The minimization strategies investigated were constrained by limits on CO and hydrocarbon emissions, both of which increased under fuel-rich combustion scenarios that resulted in reduced NO{sub x} emissions. Also, the minimization strategies were constrained by the need for reasonable heat generation rates in the furnaces that employ these by-product fuels, so that product steel quality is not adversely affected.
- Research Organization:
- University of Utah, Salt Lake City, UT (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- FG03-96EE41263
- OSTI ID:
- 765806
- Resource Relation:
- Other Information: PBD: 28 Jan 1999
- Country of Publication:
- United States
- Language:
- English
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