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Title: Demonstration of sorbent injection technology on a tangentially coal-fired utility boiler (Yorktown Limb Demonstration)

Abstract

Limestone Injection Multistage Burner (LIMB) technology has been successfully demonstrated on a tangentially fired coal-burning utility boiler, Virginia Power`s 180 MWe Yorktown Unit No. 2. This document summarizes the activities conducted, and results achieved, under this EPA-sponsored demonstration program. LIMB combines furnace injection of a calcium-based sorbent for moderate reductions of sulfur dioxide with a low nitrogen oxide firing system for NO{sub x} emissions reduction. The process is attractive for retrofit of existing coal-burning utility boilers, since the capital equipment requirements and overall sulfur reduction costs per ton of SO{sub 2} removed are less than for most other options, such as wet flue gas desulfurization. Five sorbents were tested: commercial hydrated lime, with and without calcium lignosulfonate treatment, each from two suppliers, and finely pulverized limestone. The effects of LIMB operation on boiler, electrostatic precipitator (ESP), and ash handling system performance are also discussed. The most significant impact on boiler performance was the deposition rate of LIMB solids plus flyash on boiler convective surfaces during continuous operation, resulting in poorer boiler heat transfer performance and higher temperatures leaving the boiler. Continuous operation of the sootblowing system minimized this effect. The results of two ESP performance tests which were conducted duringmore » continuous LIMB operation are discussed and compared to results from similar testing conducted without LIMB operation. Ash conditioning and disposal during LIMB operation at Yorktown was significantly affected by the unreacted lime in the ash. These problems, as well as suggested precautions to avoid them, are discussed. Recommendations for LIMB commercialization, and an evaluation of the economics of the technology in comparison to a conventional flue gas desulfurization system, are discussed.« less

Authors:
; ;  [1]
  1. Combustion Engineering, Inc., Windsor, CT (United States); and others
Publication Date:
Research Org.:
Electric Power Research Inst., Palo Alto, CA (United States)
OSTI Identifier:
123441
Report Number(s):
EPRI-TR-105258-Vol.2; CONF-950332-Vol.2
TRN: 95:007572-0016
Resource Type:
Technical Report
Resource Relation:
Conference: 15. EPRI-EPA-DOE SO/sub 2/ control symposium, Miami Beach, FL (United States), 28-31 Mar 1995; Other Information: PBD: Jun 1995; Related Information: Is Part Of Proceedings: 1995 SO{sub 2} control symposium. Volume 2, Sessions 4a, 4b, 5a, 5b; PB: 350 p.
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 20 FOSSIL-FUELED POWER PLANTS; FOSSIL-FUEL POWER PLANTS; POLLUTION CONTROL EQUIPMENT; PERFORMANCE TESTING; FLUE GAS; DESULFURIZATION; SULFUR DIOXIDE; LIMESTONE; FLY ASH; ELECTROSTATIC PRECIPITATORS; BOILERS; NITROGEN OXIDES

Citation Formats

Clark, J P, Koucky, R W, and Gogineni, M R. Demonstration of sorbent injection technology on a tangentially coal-fired utility boiler (Yorktown Limb Demonstration). United States: N. p., 1995. Web.
Clark, J P, Koucky, R W, & Gogineni, M R. Demonstration of sorbent injection technology on a tangentially coal-fired utility boiler (Yorktown Limb Demonstration). United States.
Clark, J P, Koucky, R W, and Gogineni, M R. Thu . "Demonstration of sorbent injection technology on a tangentially coal-fired utility boiler (Yorktown Limb Demonstration)". United States.
@article{osti_123441,
title = {Demonstration of sorbent injection technology on a tangentially coal-fired utility boiler (Yorktown Limb Demonstration)},
author = {Clark, J P and Koucky, R W and Gogineni, M R},
abstractNote = {Limestone Injection Multistage Burner (LIMB) technology has been successfully demonstrated on a tangentially fired coal-burning utility boiler, Virginia Power`s 180 MWe Yorktown Unit No. 2. This document summarizes the activities conducted, and results achieved, under this EPA-sponsored demonstration program. LIMB combines furnace injection of a calcium-based sorbent for moderate reductions of sulfur dioxide with a low nitrogen oxide firing system for NO{sub x} emissions reduction. The process is attractive for retrofit of existing coal-burning utility boilers, since the capital equipment requirements and overall sulfur reduction costs per ton of SO{sub 2} removed are less than for most other options, such as wet flue gas desulfurization. Five sorbents were tested: commercial hydrated lime, with and without calcium lignosulfonate treatment, each from two suppliers, and finely pulverized limestone. The effects of LIMB operation on boiler, electrostatic precipitator (ESP), and ash handling system performance are also discussed. The most significant impact on boiler performance was the deposition rate of LIMB solids plus flyash on boiler convective surfaces during continuous operation, resulting in poorer boiler heat transfer performance and higher temperatures leaving the boiler. Continuous operation of the sootblowing system minimized this effect. The results of two ESP performance tests which were conducted during continuous LIMB operation are discussed and compared to results from similar testing conducted without LIMB operation. Ash conditioning and disposal during LIMB operation at Yorktown was significantly affected by the unreacted lime in the ash. These problems, as well as suggested precautions to avoid them, are discussed. Recommendations for LIMB commercialization, and an evaluation of the economics of the technology in comparison to a conventional flue gas desulfurization system, are discussed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {6}
}

Technical Report:
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