Advantages of CFBC boiler Over AFBC boiler

1. CFBC boiler have High processing temperature due to high gas velocity through the system

2. Combustion temperature can be constantly maintained around 870 deg c. which result in minimal
    NOX formation

3.better turndown ratio in CFBC boiler compared to AFBC boiler

4. higher combustion Efficiency in CFBC boiler compared to AFBC boiler

5. combustion air supplied in CFBC boiler at a pressure of 1000-1500 MMWC where else in AFBC        boiler itis supplied at 2000-3500 MMWC

Boiler turn Down ratio & Combustion Efficiency in boilers

Boiler Turn down ratio in boiler means the ratio of Boiler capacity at Maximum Firing with fuel to Boiler capacity with Minimum Firing with Fuel before shutdown.

The Normal Turn around ratio will be 4:1

If the turnaround ratio is high on/ off cycle will be less and high energy savings can be obtained.

Combustion Efficiency:

Combustion Efficiency means how effectively the heat content in the fuel is converted to useful heat. If the combustion efficiency increases boiler efficiency increases