Monolithic Refractory Installation in CFB Boilers

A CFB (Circulating Fluidized Bed) Boiler is a combustion system that uses a fluidized bed process with bed material. The bed material is driven by high-pressure air from the FD Fan through nozzles, while coal is injected via the coal feeder into the furnace.

The mixture circulates from the furnace to the cyclone, and part of it returns to the furnace through the sealpot, forming a fluidized bed with an operating temperature of 850 – 1050 °C.

Functions of refractory lining in CFB Boilers:

• Protecting tubes from abrasion
• Heat storage
• Retaining combustion heat

Required refractory specifications:

• High abrasion resistance
• Temperature resistance 850 – 1050 °C
• Resistance to thermal shock
• Resistance to chemical infiltration