Pulverised Coal Burners and High Output Burners

Coal is renowned for burning well, but in large clumps, the surface area for ignition is relatively low. Pulverised coal firing ensures complete combustion of coal, and at a rapid rate as well. The rate between the coal particles entering the furnace and ignition is almost instantaneous, and significantly increases the efficiency of your combustion processes.

First, coal is crushed and broken down into a powder, and the finer the powder, the more rapid the ignition. This powder is then dried and heated with an air heater for more effective burning. Then the pulverised coal is blown into the burner, spreading throughout it to increase the area of ignition inside the combustion chamber.

The efficient and rapid ignition of the coal is vital to the efficacy of the whole system. To assist in this, a series of high output burners are mounted in the wall of the combustor to fire downwards onto the fluidising sand bed. Once the temperature of the sand has reached the prescribed level, coal is introduced and the burners are kept active until the chamber’s temperature is high enough for the coal ignition to be self-sustaining. Depending on the type of fuel available, either gaseous or liquid fuel burners can be utilized for this start-up duty to provide a coal ignition source.