Low-NOx XCL-S Burner Mechanical Design FeaturesComponents Features

1 I-Jet oil gun Produces a finer oil spray, reduces particulate and opacity emissions,minimizes atomizer plugging

2 Linear actuator Easily adjusts the main air sliding damper position for light-off, full-load and out-of-service cooling

3 Core air damper Adjusts core air flow to the oil gun or gas spuds for optimizing combustion

4 Sliding air damper Adjusts the majority of secondary air flow to the outer air zone, independent of swirl, to balance air flow among burners during commissioning

5 Air measurement grid Ensures an accurate indication of relative air flow with a multi-point impact/suction device

6 Externally adjustable spin vanes Provide proper mixing of the secondary air and fuel (to the end of the flame) vane position is optimized and fixed during commissioning

7 Adjustable hemispherical gas spuds Can be rotated to optimize NOx reduction and are removable while the boiler is in service

8 Burner support system Supports the burner and allows for differential expansion

Each design feature incorporated in the low-NOx XCL-S Burnerhas been refined to allow maximum NOx reduction with optimum combustion efficiency.Optional Isolation Valves

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8

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B&Ws NOx Reduction SystemApproach Offers:n Flexible application of technologies

to meet specific NOx emission limitsn Comprehensive analysis of the

impact of a low-NOx retrofit on boiler capacity and performance

n Proven technological capabilities to modify boiler pressure parts,reconfigure heating surfaces, andoptimize material selection and auxiliary systems to maximize boiler performance

System Approach Reduces NOx Emissions

The Value of Proven ExperienceThe low-NOx XCL-S Burner system approach offers signifi-cant NOx reduction capabilities across the full range of wall-fired boiler configurations and combustion firing patterns.

B&Ws leadership in the field of low-NOx reduction technology began in 1962 with the first patented OFA portsystem design.That leadership continues with unparalleledexperience, proven equipment and innovative technology.Our systems are designed to be cost-effective, dependableand adaptable to the full range of fuels and boiler arrange-ments in new or retrofit applications. Count on B&W for all your NOx emission control technology needs. For 24-hour emergency assistance, call 1-800-354-4400.

% N

Ox R

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tion

100

75

50

25

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Up to 50%

Up to 70%

Up to 90+%

Low-NOx Oil/Gas XCL-S Burner Performance

Using plug-in low-NOxXCL-S Burners, flue gasrecirculation and astaged combustion system, NOx wasreduced by ninety percent on this 350 megawatt boiler.

Equipment Description

A Gas Recirculation FlueB FGR Fan, Motor and Turning GearC Connecting DuctworkD NOx Port Pressure Part PanelE Dual Zone Overfire Air (OFA) PortF FGR Crossover FlueG Low-NOx XCL-S BurnerH Controls and Instrumentation

(Not Shown)

Color Legend

Retrofit Equipment

n Flue Gas Recirculation (FGR)n Mixing Air Foilsn Overfire Air (OFA) Portsn Connecting Ductwork (FGR/Air Mixture)n Low-NOx Oil and Gas XCL-S Burnersn Open Windbox (Existing)

Separated for Clarity

Hot Secondary Air

Flue Gas fromBoiler Outlet

Flue Gas to HopperSteam Temperature Control

A XCL-S Burner onlyB XCL-S Burner with OFAC XCL-S Burner with OFA and FGR

B

F

A

C

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For more information, or a complete listing of our sales and service offices worldwide, call 1-800-BABCOCK (222-2625) in North America. Outside North America, call (330) 753-4511 or fax (330) 860-1886 (Barberton, Ohio, USA). Oraccess our Web site at http://www.babcock.com.

Canada:Cambridge, OntarioEdmonton, AlbertaHalifax (Dartmouth), Nova ScotiaMontreal, QuebecSaint John, New BrunswickVancouver (Richmond), British Columbia

Czech Republic: PragueEgypt: CairoEngland: London India: PuneIndonesia: JakartaMexico: Mexico CityPeoples Republic of China: BeijingPoland: WarsawRussia: MoscowTaiwan: TaipeiTurkey: AnkaraUnited States of America:

Akron (Wadsworth), OhioAtlanta, GeorgiaCharlotte, North CarolinaCherry Hill, New JerseyChicago (Downers Grove), IllinoisCincinnati, OhioDenver (Sheridan), ColoradoHouston, TexasKansas City, MissouriSan Francisco (Vacaville), California

Powering the World Through Teamwork and InnovationSM

The information contained herein is provided for general information purposes only and is not intended or to be construed as a warranty, anoffer, or any representation of contractual or other legal responsibility.

XCL-S is a trademark and Powering the World Through Teamwork andInnovation is a service mark of The Babcock and Wilcox Company.

The Babcock &Wilcox Company. All rights reserved.

E101-3156 5MD6I

NOx compliance in new or retrofit applications can be achieved with the low-NOx XCL-S Burner for oil and gas. It can be supplied as a stand-alone plug-in or as part of a complete NOx reduction system that includes overfire air and/or flue gas recirculation.

A typical low-NOx oil- and gas-fired XCL-S Burner.The linear actuator (at the top of the burner) moves the sliding air damper, which controlsthe majority of secondary air flow to the burner. The hemispherical gas spuds can be rotated to minimize NOx emissions or removed for inspection while the boiler is in service.

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