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Forney Plug-n-Play Heat for SCR Reheat Applications
Forney has made low-load SCR boiler applications simple with the introduc-
tion of perimeter-fired burners. Forney perimeter-fired burners inject high
velocity air at any temperature, anywhere you need it in an SCR duct. This
allows you to eliminate the cost of expensive economizer bypass ducts and
diverting dampers. Perimeter firing eliminates the engineering and pressure
part modifications necessary with split economizer designs. With Forney
burners, the solution is simple -- Plug-n-Play Heat.
The burners are located on the outside of the SCR ductwork, firing
across the width of the duct. There is no equipment in the duct, and
the burners are continuously purged when out of service, so fouling,
plugging, flyash erosion, and other maintenance hassles are minimized.
The high velocity discharge of the burners ensures adequate penetra-
tion of heat across the duct. With Plug-n-Play Heat, no internal flow
correction devices are required. This reduces pressure drop on the
system, and eliminates another maintenance worry.
Equipment and installation costs associated with Plug-n-Play Heat
are lower than those associated with economizer gas-side bypass-
especially on units where existing structural steel makes locating new
ductwork difficult. Forney perimeter-fired burners are lightweight and
in most cases they can be supported by the SCR ductwork. Natural gas
consumption is relatively low, and some of the heat added upstream of
the SCR reactor can be recovered by the air preheater.
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CUSTOMIZED SOLUTION -
offering external, in-duct, or
perimeter-fired SCR reheater
systems. Our engineers will
custom design and integrate the
system appropriate for your plant.
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REDUCED INSTALLATION AND
CAPITAL COST - Forney Plug-n-
Play burners cost less than
economizer bypass ducts with their
associated dampers, actuators, and
expansion joints. Installation is
easier because of the burners' small
size and light weight-especially in
crowded SCR retrofit applications.
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CFD MODELING - Forney
engineering can perform CFD
modeling of heat distribution to
assure efficient SCR operation at all
boiler loads.
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EXPERIENCE - Forney
technologies are proven in SCR and
other firing applications around the
world.
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SERVICE - Forney service
engineers provide start-up
expertise and periodic maintenance
capabilities to ensure your
equipment operates reliably.
BURNERS
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Burner Specifications
Heat Input 5 mmbtu/hr
10 mmbtu/hr
Exit Temperature 600-1500 deg. F 600-1500 deg. F
Exit Velocity up to 800 ft/sec up to 800 ft/sec
Fuel Consumption Natural Gas Natural Gas
(per MMBTU) 17scfm 17scfm
Air Consumption (per burner) 670 scfm @1psig 670 scfm @1psig
Excess Air 400-800% 400-800%
Ignition Source Direct HESI Direct HESI
Flame Detector Forney IDD-UV Forney IDD-UV
Burner Throat Diam. 8" 11"
Burner Outside Diam. 24" 28"
Burner Management A-B, GE, Modicon A-B, GE, Modicon
Enclosure Ratings NEMA 4, 7 NEMA 4, 7
Flame Length 20" 24"
Other Forney SCR Products
Forney has developed a wide variety of products for the utility and industrial SCR market including:
·
DDiilluuttiioonn AAiirr HHeeaatteerrss aanndd AAmmmmoonniiaa SSkkiiddss
- Forney has supplied dilution air heaters for many large
utility boiler SCR and SNCR retrofits. Built to utility specifications, Forney dilution air heaters are
installed for vaporizing both ammonia and urea.
·
CCEEMMSS
- In addition to 40CFR Part 60 and Part 70 CEM systems, Forney recently introduced the
CEMplicity system specifically for SCR control applications. CEMplicity combines high-quality chemiluminescent NOx analyzers and paramagnetic O2 analyzers to provide a very high availability analyzer system for SCR ammonia injection control.
Accessories
Forney is a leading supplier of burner accessories for the utility burner market. Thousands of Forney
igniters, scanners, and oil guns are installed in utility boilers every year. These same components are
incorporated into Forney’s burners for utility burner performance and reliability. Available accessories
include:
·
IIggnniitteerrss
- Natural gas fired, No. 2 oil fired, or direct spark ignition
Class 1, 2 or Class 3 applications
High tension (6000 V) or High Energy ignition (12 joules per spark, 3 sparks per second)
·
SSccaannnneerrss
- Full line of flame scanners for every application.
·
FFuueell TTrraaiinnss
- Pneumatic or motorized valves, NEMA 12, NEMA 4, or explosion-proof enclosures.
·
BBuurrnneerr MMaannaaggeemmeenntt SSyysstteemmss --
Fireye E-110, Fireye Nexus, or PLC-based. Forney combustion con-
trol systems based on single-point positioning, parallel positioning, or fully metered control strategies.
·
DDiilluuttiioonn AAiirr HHeeaatteerr --
Grid style burner with duct work for ammonia vaporization in ammonia injec-
tion grid. Complete with fuel skid and Burner Management System (BMS).
·
FFaannss --
Skid mounted or ship loose fans to supply combustion air for grid register, high velocity,
and/or dilution air heater systems. Fans will be sized based upon required heat input.
·
DDiilluuttiioonn AAiirr BBlloowweerr SSkkiidd --
Forney also supplies skid mounted blower assemblies which supply air to
the dilution air burner system. Blowers are sized to ensure the air flow meets the requirements for
Forney Corporation
3405 Wiley Post Road
Carrollton, TX 75006 USA
Tel: 972.458.6100
Fax: 972.458.6650
www.forneycorp.com
Perimeter Burners
BURNERS
TECHNICAL BULLETIN
PUBLICATION
#404002-14 REV 6/03
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