Experimental research on Shenhua coal blending combustion in a 1 000 MW tower type boiler unit
ZHANG Jian
LI Xingzhi
Abstract：In order to study adaptability of Shenhua coal blending combustion in tower type boiler,the blending ratio of Shenhua coal was gradually raised by inner blended combustion and outer blended combustion.The security,economy and environmental protection of the tower type boiler were evaluated.The results showed that,with the increase of the blending ratio of Shenhua coal,the carbon content of ash decreased,the boiler efficiency increased.When the outer blending ratio of shenhua coal was less than 75％ and the inner blended ratio less than 60％,the water and steam parameters is normal,no boiler slagging phenomenon,the boiler had good adaptability to the coal.When the outer blending ratio was higher than 75％ and the inner blended ratio reached 60％,the local slagging appeared on the furnace waterwall,the boiler efficiency was higher than the outer blended combustion under the same coal proportion.Once the Shenhua coal was combusted for a long time,more attention should be payed to the primary superheater area and the burner area to prevent slagging.
Keywords：Shenhua coalslaggingboiler efficiencyouter blended combustioninner blended combustiontower type boiler
Publication Date：2017-01-01