Radiant Boiler
Subcritical Radiant Boilers

Subcritical Radiant (RB) Boilers

Our extensive worldwide experience in designing, manufacturing, installing and servicing more than 700 RB boilers gives our customers the reliability and dependability they demand.  B&W's RB boiler incorporates natural circulation which takes advantage of the density difference between water in the downcomers and the steam/water mixture in the furnace tubes. With natural circulation, no pumps are required, so auxiliary power requirements are reduced and availability is improved.  B&W's RB boiler is typically designed with a parallel back-end that allows gas biasing reheat steam temperature control.

Benefits include:

  • No attemperating spray requirements
  • Reliable control of reheat temperature separate from the combustion process (as compared to tilting burners); this in turn:
    • eliminates interaction with combustion system optimization for NOx control
    • eliminates the effect on furnace slagging characteristics
    • avoids the need for maintenance of burner tilt mechanisms

Our surface arrangement design provides benefits for added reliability and availability, including:

  • High temperature supports outside of the flue gas stream
  • Minimal motion between the boiler roof penetrations
  • Pendant section spacing appropriately matched for the gas temperature and coal slagging characteristics
Our vast design and operating experience gives us the unique capability to accommodate many worldwide coals and blends while meeting required steam conditions without sacrificing reliability or availability.

Steam Drum Design

Steam Drum

B&W’s steam drums are designed with two-stage separation to provide the most effective steam-water separation for reduced turbine maintenance and improved circulation.

 Radiant Boiler Product Specifications

 Radiant Boilers for Reliable Subcritical Steam Applications

 Features Benefits 
Natural circulation, including internally ribbed tubes and advanced steam drum internals
  • Prevents departure from nucleate boiling (DNB) and reduces furnace tube failures
  • High steam purity for reduced turbine maintenance
  • Reduced auxiliary power consumption and pump maintenance
  • Improved overall boiler reliability
Large furnace arch
  • Conforms gas flow and eliminates gas bypassing at furnace exit for improved heat transfer
  • Reduces peak temperatures and slagging potential in the superheater sections to improve availability and reliability
Wall firing
  • Even distribution of heat release across unit width
  • More uniform flow and gas temperature at furnace exit for reduced erosion and slagging
High-temperature header design
  • Minimizes maintenance due to ligament or weld cracking
Gas-tight construction
  • No penthouse seal blower reduces power requirements and maintenance
Gas biasing steam temperature  control
  • Reliable control of reheat steam temperature
  • Improved plant heat rate for less fuel consumption, lower operating cost and lower aggregate emissions
Accommodates a wide range of coals
  • Provides flexibility in fuel choices
B&W Roll Wheel™ pulverizers
  • Reliable service for optimum steam generator performance and availability
  • No loss of capacity with wear of the grinding elements
Low NOx burners
  • Proven performance in reducing combustion NOx while maintaining low CO                                                                                                                                      

New Build

Babcock & Wilcox (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.

Dry Fork Station

Project / Case Feature Item

Dry Fork Station
Wyoming, USA

The 400 MW Dry Fork Station features a RB Carolina-type pulverized coal fired boiler and B&W AireJet® low NOx burner technology.

B&W Hawthorn Unit 5 Project

Hawthorn Station – Missouri, USA

Design, supply, erection and commissioning of a complete replacement boiler on an accelerated 22-month schedule

B&W Tanjung Jati B Units 1 and 2 Project

Tanjung Jati B – Indonesia

Consortium supplies complete boiler island for two coal-fired units, from ship unloaders to the stack

B&W Newmont Mining TS Power Plant Project

Newmont Mining – Nevada, USA

Coal-fired boiler and air quality control system provides reliable, low-emissions electricity to operations throughout northern Nevada