The combustion properties

emission characteristics and adaptability of a supercritical 600 MW unit CFB boiler firing different coals were studied. The test results show that

the main equipment and auxiliary system of the boiler has well adaptability to the coal type. When burning different kinds of coals

the boiler has relatively high combustion efficiency. The combustion efficiency reached the highest 97.94% when firing pure Shenhua coal and the lowest 94.76% when firing the pure design coal

it is within the range when firing blended coals. The boiler applies the dry desulfurization process

with the highest desulfurization efficiency of 98.2% and the minimum of 94.8%. Under all test conditions

the SO_2 emissions were lower than 300 mg/m~3

and the NOx emissions were lower than 200 mg/m~3

which meets the requirements of environmental emission limits at the present stage. The ignition test shows the ignition temperature of the design coal is 430 ℃

which is medium.