CFBC Boiler
Circulating Fluidized Bed Combustion (CFBC) boilers represent the
pinnacle of high-efficiency utility steam generation. Designed for large-scale operations,
CFBC technology utilizes high fluidizing velocities to entrain solids, separating them via
cyclones and returning them to the lower furnace. This provides excellent fuel mixing, high
carbon burnup, low emissions, and superb load responsiveness.
Key Features
- Excellent Turn Down Ratio: Smooth
turn down capability without requiring auxiliary fuel.
- Gravity Solid Recycle: Internal bed
material circulation by gravity and FD/PA fan air.
- High Separation Efficiency: High
solid collection efficiency via cyclone separator.
- Very Thin Refractory: Minimizes
thermal inertia and reduces maintenance.
- Ultimate Fuel Flexibility: Burns
lignite, coal, biomass, rejects, and petcoke.
- Low Emissions: Extremely low SOx
and NOx emission levels.
Advantages of CFBC Boiler
Low Auxiliary Power
Optimized aerodynamic fan selection ensures minimum auxiliary power consumption.
High Combustion
Long solids residence time ensures excellent carbon burnup and high thermal
efficiency.
Quick Startup
Reduced refractory mass allows faster start-up time and minimizes startup fuel
costs.
Higher Reliability
- Less erosion rate, resulting in reduced
maintenance costs.
- No soot blowers are required in the main bank.
- Lower gas velocity in the furnace prevents
wear.
- Designed to protect against superheater
erosion.
System Anatomy
1Primary Air
2Secondary Air
3Fuel,
Limestone, Make-up
4Refractory Lined Lower Furnace
5Furnace Membrane Walls
6Internal Heat Transfer Surfaces
7Separator (Cyclone)
8Downcomer / Return
9Integrated Bubbling Bed Exchanger
10Cross-over Duct
11Backpass with Heat Exchangers
12ESP
13Stack
