To solve problem of uncertain change of boiler operation parameters when blending coal with great difference in coal quality

by taking a 660 MW W-flame boiler as the research object

the acceptance condition of 100% heat consumption rate as the boiler load condition

the influence of blending Jinzhushan anthracite(anthracite)in different proportions with Yima bituminous coal(bituminous coal

the current coal) on boiler operation parameters is studied. Via numerical simulation

the changes of boiler effective heat utilization

flue gas velocity and temperature

and NO_x

SO_x and CO formation when the two coals are mixed with different proportions are obtained. The results show that

when the boiler runs at high load

the mixed combustion ratio of 65% anthracite and 35% bituminous coal can prolong the service life of the boiler and reduce the probability of corrosion on heating surface of the furnace

but it does not promote the ignition and stable combustion of pulverized coal. The blending ratio of 50% anthracite +50% bituminous coal can meet the rated efficiency of the boiler and significantly reduce the power generation cost

but the corrosion of the furnace heating surface will be more serious.