Enhancing the use of coals by gas reburning-sorbent injection [electronic resource] : Volume 3 -- Gas reburning-sorbent injection at Edwards Unit 1, Central Illinois Light Company. Final report.
Design work has been completed for a Gas Reburning-Sorbent Injection (GR-SI) system to reduce emissions of NO{sub x} and SO₂ from a wall fired unit at Central Illinois Light Companỳs Edwards Station Unit 1, located in Bartonville, Illinois. The goal of the project was to reduce emissions of NO{sub...
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| Format: | Government Document Electronic eBook |
| Language: | English |
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Pittsburgh, Pa.,; Morgantown, W.Va. : Oak Ridge, Tenn. :
National Energy Technology Laboratory (U.S.) ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
1996.
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| Summary: | Design work has been completed for a Gas Reburning-Sorbent Injection (GR-SI) system to reduce emissions of NO{sub x} and SO₂ from a wall fired unit at Central Illinois Light Companỳs Edwards Station Unit 1, located in Bartonville, Illinois. The goal of the project was to reduce emissions of NO{sub x} by 60%, from the as found baseline of 0.98 lb/MBtu and to reduce emissions of SO₂ by 50%. Since the unit currently fires a blend of high sulfur Illinois coal and low sulfur Kentucky coal to meet an SO₂ limit of 1.8 lb/MBtu, the goal at this site was amended to meeting this limit while increasing the fraction of high sulfur coal to 57% from the current 15% level. GR-SI requires injection of natural gas into the furnace at the level of the top burner row, creating a fuel-rich zone in which NO{sub x} formed in the coal zone is reduced to N₂. Recycled flue gas is used to increase the reburning fuel jet momentum, resulting in enhanced mixing. Recycled flue gas is also used to cool the top row of burners which would not be in service during GR operation. Dry hydrated lime sorbent is injected into the upper furnace to react with SO₂, forming solid CaSO₄ and CaSO₃, which are collected by the ESP. The system was designed to inject sorbent at a rate corresponding to a calcium (sorbent) to sulfur (coal) molar ratio of 2.0. The SI system design was optimized with respect to gas temperature, injection air flow rate, and sorbent dispersion. Sorbent injection air flow is equal to 3% of the combustion air. The design includes modifications of the ESP, sootblowing, and ash handling systems. |
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| Item Description: | Published through the Information Bridge: DOE Scientific and Technical Information. 03/01/1996. "DOE/PC/79796--T48-Vol.3" "DE96011868" ": Contract 5087-254-149" Energy and Environmental Research Corp., Irvine, CA (United States) Energy and Environmental Research Corp., Orville, OH (United States) USDOE, Washington, DC (United States);Gas Research Inst., Chicago, IL (United States);Illinois State Government, Springfield, IL (United States) |
| Physical Description: | 72 p. |