# B & 

# W for Biomass Proven technologies to utilize biomass as a renewable energy source

### Renewable energy is becoming a necessary and beneficial component of a power producer’s overall mix of energy sources.

While various levels of the United States government continue to enact renewable portfolio standards and implement renewable energy certificates, it is advantageous to look at the various options available as renewable
energy sources.

One of those sources is biomass. Babcock & Wilcox Power Generation Group, Inc. (B & 

### W PGG) has been a trusted supplier of biomass combustion equipment for many years. Our extensive listof commercially demonstrated and industryaccepted products have stood the test of time in providing reliable steam generation for both process and electric power applications. While offering a highly available and readily dispatchable renewable energy source, the combustion of biomass also provides environmental benefits such as reduced emissions of nitrogen oxides (NO x ), sulfur oxides (SO x ), and mercury, when compared with other fossil fuels. Biomass is also a carbon dioxide (CO 2 

### )-neutral renewable
energy source. Stoker fired

Bubbling fluidized bed Circulating fluidized bed

# A wide variety of solutions for biomass combustion

B &

W PGG has demonstrated experience with a wide range of fuels and technolo

gies for burning biomass to produce steam for both utility and industrial customers. These include:

■ Bubbling fluidized-bed

(BFB) boilers

■ Circulating fluidized-bed

(CFB) boilers

■ Stoker-fired boilers

■ Black liquor recovery

boilers (process recovery)

B &

W PGG, including its joint ventures and licensees, has installed numerous unitsusing fluidized-bed technology. Additionally, our experience with traditionalstoker-fired, pulverized coalfired and recovery boilers is unmatched in the industry. Regardless of the combus

tion technology, or whether steam is needed to produce electricity or for combined heat and power applications, we have the expertise andproven experience to costeffectively utilize biomass as a renewable energy source. 

### Bubbling fluidized bed B &

W PGG’s BFB technol

ogy has been successfully applied to a wide range of wood, wood waste, sludges and residues. Design features include an open bottom design which is particularly well suited for biomass fuel applications that contain non-combusti

ble debris. The boilers can be designed as either bottom or top supported depend

ing on the desired size and capacity. Designed with the capability to tightly control bed temperature, a BFB offers greater combustion efficiency and reduced emissions. Our ability to successfully retrofit fossil fuel-fired power boilers and con

vert existing black liquor recovery boilers to fire solid fuel biomass using BFB technology has been repeatedly demonstrated. In short, B & W PGG’s com

mercial experience with a wide range of unit sizes and fuels makes the BFB boiler a viable option in many situations for efficient and dependable steam genera

tion from biomass. 

### Circulating fluidized bed B &

W PGG’s internal recircu

lation circulating fluidizedbed (IR-CFB) boiler offers economy, reliability and flexibility. One of the main advantages of our CFB technology is that it provides the owner flexibility in specifying a variety of fuels. It is particularly attractive when wanting to fire coal with a biomass fuel. Its compact arrangement makes it ideal for both repower

ing and new installations. A unique U-beam particle separator reduces the refractory required and operates at low flue gas velocities which result in

B & W PGG’s commercially demonstrated and industry-accepted biomass-fired boilers have provided reliable steam generation for both process and electric power applications for many years. ▲ The modular design of B & W PGG’s Towerpak ® boiler minimizes construction time and costs. ▲



### BFB features and benefits:

■ 

### fuel flexibility – wood, bark, tires,

sludges, residues

■ 

### open bottom bed for effective debris

removal

■ 

### low emissions

■ 

### suitable for new or retrofit applications

■ 

### low maintenance and high availability

■ 

### modular or bottom supported designs

reduce cost

# A wide variety of solutions for biomass combustion

significantly lower mainte

nance than competitors’ units. Additional benefits include operating flexibility and low emissions. 

### Stokers In addition to fluidized beds, water-cooled vibrating grate stoker-fired units may prove to be the technology of choice in certain applications, particularly for wood, agricultural crops and residues. B & W pgg leads the way with proven products such as the Stirling ® power boiler and Towerpak ® boiler. These units are custom designed to meet specific steam and fuel conditions, but the design is donewithin a framework of preengineered components to minimize engineering costs and delivery time. 

### CFB features and benefits:

■ 

### ideal for firing with coal, biomass, or a

combination of both

■ 

### low maintenance

■ 

### high availability

■ 

### compact size and arrangement is ideal

for repowering projects

■ 

### low emissions

Shop modularization of the BFB bottom hoppers and bubble cap air distribution system minimizes on-site construction time and costs. ▲ • Selective Non-Catalytic Reduction or Selective Catalytic Reduction

• Selective Non-Catalytic Reduction

or Selective Catalytic Reduction

• Wet Flue Gas Desulfurization • Selective Non-Catalytic Reduction

• Dry Flue Gas Desulfurization

(in certain applications) • Wood/Wood Waste or

• Wood/Wood Waste,

Sludge, Tires BFB

Stoker CFB

• Wood/Wood Waste

• Straw

• Stover

• Animal Waste

• Coal • Coal or

• Coal and Wood/Wood

Waste, Petroleum Coke, Tires Fuel Technology Matrix Fuel Boiler Environmental EquipmentB & W PGG’s BFB technology has been successfully applied to a wide range of biomass fuels. Either our CFB or stoker technology is recommended when wanting to fire coal with a biomass fuel.



## New or retrofit Depending on the application, it may be advantageous to consider installing new steam generating equipment or retrofitting existing equipment with modern combustion technology. B & W combines the engineering know-how and practical experience needed to completely analyze the available options and recommend the most cost-effective course of action. 

## Emissions control equipment Today’s environmental regulations mean a supplier should not only have the capability to provide the steam generating equipment, but also the environmental equipment necessary to meet mandated air quality standards. Core competencies include:

■ Engineering

■ Project management

■ Construction

■ Startup and commissioning

■ Training programs

■ Field engineering services

■ Replacement parts

■ Condition assessment

■ Engineered improvements From engineering, manufacturing and construction, to startup and field service, B & W PGG knows how to make it all work together for maximum operating efficiency and dependability. B &

W PGG’s line of environmental prod

ucts includes technologies for NO x , SO 2 and particulates:

■ Selective catalytic reduction

(SCR) systems

■ Electrostatic precipitators (ESP)

■ Fabric filter baghouses

■ Flue gas desulfurization

(FGD) systems 

## B & 

## W PGG puts it all together
When you work with B & W PGG, you’ll get the complete package. As a single-source supplier, our capabilities extend well beyond steam generating equipment supply.As utilities and industrial firms alike consider
future strategies to utilize renewable energy,

B & W PGG can provide viable options for the

combustion of biomass fuels. We have
commercially demonstrated technologies and experience with firing a wide variety of
biomass fuels. Contact us today to learn how
biomass can be a part of your power and
steam generation portfolio. Babcock & Wilcox Power Generation Group, Inc. is a subsidiary of The Babcock & Wilcox Company (B&W). Established in 1867, B&W is a world leader in providing steam generating and emissions control equipment, nuclear operations and components, and defense program management services. For more information, or a complete listing of our sales and service offices, call 1-800-BABCOCK (222-2625), send an e-mail to info@babcock.com, or access our Web site. www.babcock.com

Babcock & Wilcox Power Generation Group, Inc. 20 S. Van Buren Avenue Barberton, Ohio 44203 USA Phone: 330.753.4511 Fax: 330.860.1886
The information contained herein is provided for general information purposes only and is not intended nor to be construed as a warranty, an offer, or any representation of contractual or other legal responsibility. Stirling and Towerpak are registered trademarks of Babcock & Wilcox Power Generation Group, Inc. © 2008 Babcock & Wilcox Power Generation Group, Inc. All rights reserved.

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