电石渣基高效助燃脱硫剂制备及其应用研究

Preparation and Application of Carbide Slag-Based Combustion-Supporting Desulfurization Agents

采用电石渣复合生石灰及其他助燃组分制备干基脱硫剂,完全可适用于循环流化床的气力输送喷入系统。通过添加复合矿产尾渣催化助燃组分,可有效提高其炉内燃烧效率。试验表明:使用本研究的电石渣基高效助燃脱硫剂,Ca/S>2.5时,在循环流化床锅炉的炉内脱硫效率可达到90%以上,且煤炭燃烧效率提高3%以上。其所产生固硫灰按照30%掺量替代52.5号强度等级水泥熟料所配比胶凝材料,28 d抗压强度达到45.40MPa,且物理性能良好。

Using electric stone slag composite lime and other combustion fraction prepared from dry desulfurizing agent can be completely applied to circulating fluidized bed pneumatic conveying, and adding the compound mineral tailings catalytic combustion components is effective to improve combustion efficiency. Experimental results show that： by using the carbide slag base efficient desulfurizing agent in circulating fluidized bed boiler furnace, the desulfurization efficiency could exceed above 90% with the Ca/S ratio over 2.5, and coal combustion efficiency could improve more than 3%. When desulfurization ash substituted for 30% of 52.5 grade cement clinker, compressive strength of the cementitious material at 28d could reach to 45.40MPa, and had good physical property,