B&W BFB Boiler

Bubbling Fluidized-Bed Boilers

Bubbling Fluidized-Bed (BFB) Boilers

B&W’s BFB boilers are designed to allow a wide range of fuels to be burned, separately or in combination. The ability to utilize various fuel sources and types provides owners with the flexibility to take advantage of opportunity fuels and control fuel costs.

B&W’s advantage

B&W’s BFB boiler is designed with reliability in mind. Several features combine to provide low maintenance costs, high availability and long-term reliability:

  • An open bottom design permits easy removal of oversized or foreign material.
  • A water-cooled, gas-tight lower furnace eliminates the potential for gas leaks caused from refractory damage.
  • Bottom-supported hoppers remove load from the boiler, reduce capital requirements, and reduce potential mechanical stresses between water-cooled and non-cooled components.

BFB Top Supported Boiler

B&W Top-Supported BFB Boiler

B&W Bubbling Fluidized-Bed Boilers

B&W Bottom-Supported BFB Boiler

Incorporated in our design are these features to reduce maintenance costs:

  • No wear parts
  • No moving parts
  • No water-cooled screws or beams
  • No cinder re-injection system
  • Long-lasting bubble caps



  • Bottom-supported: Up to 225,000 lb/h (28.4 kg/s)
  • Top-supported: From 225,000 to 1,000,000 lb/h (28.4 to 126 kg/s)

Steam pressure: To 2600 psig (17.9 MPa)

Steam temperature: To 1000F (538C)

New Build

B&W Projects New Build
We consistently demonstrate the ability to successfully execute innovative solutions for our customers, from new equipment to large, complex full-scope engineering and construction projects.

Upgrades / Retrofits

Upgrades and Retrofits by B&W
Modifying, improving and maintaining existing equipment are vital considerations for the long-term viability and profitability of all operations.

Parts / Services

Babcock & Wilcox Parts and Service Support
An extensive network of worldwide regional service centers, field service engineers and technical support personnel are available to provide the customized service and aftermarket solutions for your requirements.

University of Missouri

Project / Case Feature Items

University of Missouri
Missouri, USA

B&W designed, engineered and supplied a biomass-fueled bubbling fluidized bed (BFB) boiler to replace the University of Missouri’s existing coal-fired boiler, and to provide the university campus with electricity and steam for heating and other uses. Designed to burn chipped hardwoods and various local opportunity fuels near the university campus, the boiler will produce lower sulfur dioxide emissions and less ash than a typical coal-fired boiler.

Snowflake White Mountain Power – Arizona, USA

Decommissioned boiler converted to biomass-burning BFB to meet renewable goals and tight schedule

B&W’s Open-Bottom Bubbling Fluidized-Bed Technology

Mill – Oregon, USA

Open-bottom BFB technology designed for biomass firing improves capacity and emissions control

From Black Liquor to Sludge: Converting a Recovery Boiler to a Bubbling Fluid Bed

Paper Mill – USA

Conversion of recovery boiler to BFB an economic and environmental solution to extend plant’s asset life