The influence of coal quality decline upon flame temperature level in the furnace of coal-firing utility boiler

upon flame temperature level in outlet region of the burners

as well as upon furnce-incoming coal quantity

air quantity

and pulverized coal and air flow at outlet of the burners

and upon combustion stability in the furnace has been analysed.For these

measures of divided allocation of the ignition belt at the side backing to fire in tangential firing boiler and adopting PCSB burners of pulverized coal etc.have been taken.The said measures have very remarkable effectiveness for boilers burning nonflammable coal sort with low volatile content.