Enhancing the use of coals by gas reburning-sorbent injection [electronic resource]
The objective of this project is to evaluate and demonstrate a cost effective emission control technology for acid rain precursors, oxides of nitrogen (NO[sub x]) and sulfur (SO[sub x])on two coal fired utility boilers in Illinois. The units selected are representative of pre-NSPS design practices:...
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Online Access |
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| Corporate Authors: | , |
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. : Oak Ridge, Tenn. :
United States. Dept. of Defense ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
1993.
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| Subjects: |
| Summary: | The objective of this project is to evaluate and demonstrate a cost effective emission control technology for acid rain precursors, oxides of nitrogen (NO[sub x]) and sulfur (SO[sub x])on two coal fired utility boilers in Illinois. The units selected are representative of pre-NSPS design practices: tangential and cyclone fired. The specific objectives are to demonstrate reductions of 60 percent in NO[sub x] and 50 percent in SO[sub x] emissions, by a combination of two developed technologies, gas reburning (GR) and sorbent injection (SI). With GR, about 80--85 percent of the coal fuel is fired in the primary combustion zone. The balance of the fuel is added downstream as natural gas to create a slightly fuel rich environment in which NO[sub x]is converted to N[sub 2]. The combustion process is completed by overfire air addition. SO[sub x] emissions are reduced by injecting dry sorbents (usually calcium based) into the upper furnace. The sorbents trap SO[sub x] as solid sulfates that are collected in the particulate control device. This project is conducted in three phases at each site: (1) Design and Permitting, (2) Construction and Startup, and (3) Operation, Data Collection, Reporting and Disposition. Technology transfer to industry is accomplished through the formation of an industry panel. Phase I of the project commenced on June 5, 1987. Phases I and II have been completed and Phase III is now in progress at both sites. In phase AIII at Hennepin - Testing, Data Collection, Reporting and Disposition - Gas Reburning runs were made that indicate as high as 77% reduction in NO[sub 2] emission using about 18% gas. Gas Reburning - Sorbent Injection test results indicated as high as 62% reduction in SO[sub 2]. These results are- significantly higher than the project emission reduction goals of 60% NO[sub 2] and 50% S0[sub 2] and provide a wide safety margin for maintaining the 60% and 50% emission reductions during long term routine testing. |
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| Item Description: | Published through the Information Bridge: DOE Scientific and Technical Information. 04/15/1993. "doe/pc/79796-t32" "DE93013066" STOFIL. Illinois State Government, Springfield, IL (United States) |
| Physical Description: | Pages: (15 p) : digital, PDF file. |