Wisconsin Public Service
Wausau, Wisconsin

Plant Owner
Wisconsin Public Service

Plant Name
Weston Unit 4

Location
Near Wausau, Wisconsin

B&W Scope

• Supercritical coal-fired boiler with air quality control system
• Construction by Babcock & Wilcox Construction Co., Inc. (BWCC)
• Startup and commissioning advisory services
• Training

Boiler Specifications  

• Boiler type: Pulverized coalfired Spiral Wound Universal Pressure (SWUP™)-type supercritical boiler
• Design fuel: Low sulfur Powder River Basin coal
• Capacity: 530 MW net
• Steam flow: 3,641,000 lb/h (458 kg/s)
• Superheater outlet pressure: 3775 psig (26 MPa)
• SH/RH outlet temperature: 1085/1085 F (585/585 C)

The Weston 4 supercritical boiler utilizes spiral furnace tube technology that provides flexible and reliable operation.

Weston site aerial view during construction.

• DRB-4Z^® low NOx burners and overfire air
• Selective catalytic reduction (SCR) NOx removal system
• Dry flue gas desulfurization (FGD) system
• Pulse jet fabric filter particulate collector
• Powdered activated carbon injection system for mercury removal

Other Equipment Supplied by B&W

• B&W Roll Wheel^® pulverizers, Series 89
• Hydrojet^® and sootblower boiler cleaning system by B&W.
• Powerclean™ intelligent sootblowing system

Contract Order: 2004

Commercial Operation 2008