Up to 4,535 TPH
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Up to 620°C
Up to 286 kg/cm²(g) (Up to 280 bar)
Pulverised Fuel Supercritical and Ultra-Supercritical Boilers
High-efficiency, spiral wound furnace, variable pressure, once-through boiler system with rapid startup for safe and reliable steam generation of supercritical and ultra-supercritical parameters
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High-efficiency supercritical boilers with a proven spiral wound design ensure efficient heat transfer under variable loads, using finely pulverised coal for large-scale steam generation
The Spiral Wound Furnace (SWUP) boiler is engineered for uniform tube temperatures and optimised heat transfer across all zones. The robust design ensures exceptional operational flexibility with flexible operation modes for base and cyclic load, optimised reheater performance through a split back pass, and versatile opposed-wall firing across a broad variable pressure range. Enhanced with low NOx systems, rapid startup and high-performance pulverisers, this boiler maximises performance, reliability, and long-term operational efficiency.
Technical data
- Product capacity / performance range –
- Capacity range: Up to 4,535 TPH
- Pressure: Up to 258 kg/cm²(g)
- Temperature: Up to 620°C
- Fuel type or energy sources - Primarily coal (supports a wide range of global coal types), can also support other fuels in a blend based on custom design
- Compliance or standards followed – In accordance with IBR/ASME and B&W’s internationally recognised engineering, manufacturing and quality standards
- Design –
- Once-through boiler design
- Spiral wound furnace with multi-lead ribbed tubing
- Balanced draft and water-cooled design
- Horizontal and vertical convection passes
- Variable pressure operation
- Designed for dry/wet ash removal
- Flexibility or customisation options
The product can be customised based on customer needs or scale
Product features
Optimised performance and durability
Built for B&W Roll Wheel™ pulveriser systems with Auto-Spring™ classifier, static / rotating classifier, ensuring optimal fineness, capacity, and durability despite high wear on grinding elements
Comprehensive heat exchange surfaces
Features a water-cooled dry bottom furnace, superheater, reheater, economiser, and air preheater for maximum heat recovery
Flexible operation modes
Designed for base load, full variable pressure load cycling, and on/off cycling operations
Uniform heat transfer
Spiral furnace design ensures superior and uniform heat transfer, optimising variable pressure operation
Optimised reheater performance
Split back pass design with biasing dampers guarantees zero reheater spray for enhanced efficiency
Versatile opposed wall firing
Proven opposed wall firing effectively handles a wide range of coal grades
Broad variable pressure range
Capable of variable pressure operation
Robust heat exchanger design
Conservative design of superheater and reheater surfaces provides excellent operational flexibility
