Zhundong-coal from Wucaiwan is highly inflammable and easily burnt out

which has excellent combustion properties.However

this kind of coal has the characteristic of serious slagging

because of the high content of sodium and calcium in the coal ash.Thus

taking No.2unit in Zhundong Wucaiwan Power Plant as the research object

this article numerically simulated the temperature field and pulverized coal particle flow characteristics in furnace of the opposed firing boiler equipped with swirling burners.The results show that

the swirl strength of the secondary air outside the rear-wall burner was too large

causing an over high flue gas temperature around water wall at the rear-wall.Due to the hot gas flow

the pulverized coal flowing from the D layer burners got close to the walls

thus the slagging on the rear-wall became serious

and the safe and economic operation of the boiler firing Zhundong coal was greatly affected.Therefore

during combustion of Zhundong coal

to ease the slagging

it is better to carry out load disturbance according to the actual situations

or co-fire the coals with low sodium content from the lower layer(layer A or B)mills.