Development and industrial application of oil-reburning for NO{sub x} emission control in utility boilers

Technical Report · Mon Jan 01 04:00:00 EST 1996

OSTI ID:269418

De Michele, G; Pasini, S ^[1]; Tarli, R; Bertacchi, S ^[2]

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1. ENEL-DSR/CRT, Pisa (Italy)
2. ENEL-DPT/STE, Pisa (Italy); and others

ENEL is conducting a comprehensive modification program within its generating system, in order to comply with the new Italian air quality standards for fossil fuel-fired power plants, which set a limit for NO{sub x} of 200 mg/Nm{sup 3} corrected to 3% O{sub 2} for oil and gas and to 6% O{sub 2} for coal. Among all combustion modification technologies reburning has proven particularly attractive, since it has been demonstrated that it generally permits to satisfy the regulatory requirements in gas and oil fired units, thus avoiding the use of SCR. The ENEL generating system essentially employs tangentially fired (TF) and front/opposed wall fired boilers belonging, respectively, to the CEI and Babcock & Wilcox (B&W) technology, designed and constructed by Ansaldo and Franco Tosi (now bought by Ansaldo). In this framework ENEL has signed respectively with Ansaldo Energia and Combustion Engineering Inc. (CEI), and with Ansaldo Energia two separate agreements to apply Reburn Technology in oil and gas, tangentially-fired (TF) utility boilers, the first, and oil and gas wall-fired (WF) utility boilers, the second, both in Italy and abroad. This paper outlines the technical knowledge available for the design of reburn systems for a retrofit application and describes the main results obtained, after retrofit, at Torvaldaliga No. 2 power station, 320 MW{sub e} (TF), firing both oil and gas as reburn fuels, and at Cassano unit No. 1, 75 MW{sub e} (WF), firing gas as main and reburn fuels. Reference is also made to the development of the projects for the application of the technology at Monfalcone, 320 MW{sub e} (WF), in the oil over oil configuration, whose demonstration is planned for the Autumn of 1995, and at Porto Tolle unit No. 1, 660 MW{sub e} (TF), that is planned to start in January 1996.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (United States)
• OSTI ID: 269418
• Report Number(s): EPRI-TR--105978-V4; CONF-9505150--Vol.4
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
20 FOSSIL-FUELED POWER PLANTS
AIR POLLUTION CONTROL
BOILERS
COAL
COMBUSTION
DENITRIFICATION
FLUE GAS
FOSSIL-FUEL POWER PLANTS
FUEL OILS
NITROGEN OXIDES
POLLUTION CONTROL EQUIPMENT
RETROFITTING
TECHNOLOGY ASSESSMENT