湿法烟气脱硫系统采用电石渣为脱硫剂的试验研究

Experimental Study on the Usage of Carbide Slag as Desulfurization Agent for Wet Flue Gas Desulfurization System

用电石渣替代石灰石作为脱硫剂,可变废为宝。某电厂600 MW机组脱硫系统原采用石灰石为脱硫剂,以该电厂为研究对象,进行了改用电石渣作脱硫剂的试验研究,分析采用电石渣做脱硫剂后不同pH值对脱硫效率及石膏品质的影响,并对比了电石渣与石灰石作为脱硫剂时的经济性。试验结果表明,将电石渣用作脱硫剂,脱硫效果良好,并可大幅度降低脱硫成本;副产物石膏水分有所增加,需加强脱硫剂的预处理和石膏脱水系统的优化设计。

Using carbide slag to replace limestone as desulfurization agent is a new technology turning wastes into treasures. Take the example of the 600-MW unit of a power plant, where limestone was previously utilized as desulphurization agent. The experimental study on the usage of carbide slag as desulfurization agent is carried out. The effects of different pH values on the desulfurization efficiency and the gypsum quality are analyzed respectively, and the economic performance of carbide slag and limestone as desulfurization agent are compared as well. The study results show that the performance of carbide slag as a desulfurization agent is satisfactory with the corresponding cost greatly reduced. However, the water contents may rise in the byproduct gypsum, which makes it necessary to enhance the pretreatment of the desulfurization agent and optimize the design of gypsum dewatering system.