AFBC Boilers: High Efficiency for Diverse Fuels & Power

About

AFBC Boiler

Atmospheric Fluidized Bed Combustion (AFBC) boilers offer one of the most effective solutions for process heat and power generation. Capable of burning a wide range of fuels with combustion efficiency exceeding 85%, AFBC boilers perform reliably regardless of ash content — making them ideal for industries seeking flexible, high-efficiency steam generation.

Advantages

High efficiency
Fast response to load variation/fluctuation
Low on operating cost
Simple operation and quick start up
High reliability
Flexible on versatile fuels
Maximum fuel & Auxiallary power saving
Fuel: Indian /Imported Coal, Lignite, Rice Husk
Fuel: Washery Rejects, Petcoke, Dolachar

Low-Maintenance Design Features

Water wall membrane design for maximum heat absorption and structural rigidity
Four-stage steam separation to ensure zero carryover
Optimum velocity and pitch in the economizer for extended tube life
Studded in-bed evaporator tubes immersed in the bed for efficient heat extraction
Welded and factory assembled PA and fuel nozzles.
High-efficiency fans that optimize power consumption and minimize noise levels

Hopper Bottom (Fluid Bed) Salient Features

Reduced furnace maintenance, as the combustor has no moving parts
Optimum combustion through uniform temperature distribution and fluid bed agitation
Higher efficiency due to low excess air requirements
Lower NOx and CO emissions.
Low SOx emission with limestone addition.
Low-temperature operation minimizes the biomass fuel ash agglomeration and fouling tendency.

Continuous slow draining of bedash aids:

Easy settling and disposal of large-sized particles, which hamper fluidization.
Maintaining alkali concentration below acceptable levels.
Avoiding accumulation of denser particles in bed in maintaining uniform bed density across the entire bed" under-bed / over-bed fuel feeding for proper fuel distribution.

AFBC is a versatile boiler offers simple operation and quick start up

Available in Bi-drum/ Single drum.
Suitable to generate saturated and super heated systems.
Suitable for cogeneration and captive power plants.
Underbed/ Overbed fuel feeding/ Bottom hopper design.
Low excess air requirement resulting in higher efficiency.
A secondary firing system is provided in the furnace to ensure optimal combustion resulting in minimum un-burnt fuel, reduced CO level in the flue gas, and improved efficiency.