几种消泡剂在乙烯废碱液脱硫过程中的消泡性能的研究

Study on the Defoaming Performance of Several Defoaming Agents in the Desulfurization Process Using Ethylene Waste Alkali Liquor

摘要: 乙烯废碱液作为脱硫剂的湿法烟气脱硫工艺，脱硫效率高，具有良好的经济效益和环境效益。吸收浆液发泡溢流是湿法烟气脱硫过程中较为常见的现象，它对脱硫系统的稳定运行非常不利。乙烯废碱液有一定的发泡趋势，其发泡高度受溶液温度和气流速度的影响。乙烯废碱液中加入消泡剂TEGO-106，消泡效果最好，泡沫高度从27 cm降到2.2 cm，消泡效率为92%。添加TEGO-106消泡剂的最佳浓度为25 ppm。

Abstract: The process of wet flue gas desulfurization in which ethylene waste alkali liquor was applied as the desulfurization absorbent was beneficial not only to environment but also to the economy for its high desulfurization efficiency. The absorber slurry foaming and overflowing was relatively common in wet flue gas desulfurization processes, which was adverse to the stable operation of the flue gas desulfurization systems. With the certain foaming tendency, the foam height of ethylene waste alkali liquor was affected by both the solution temperature and the gas velocity. Adding the defoaming agent TEGO-106, the defoaming effect was maximized; the foam height reduced from 27 cm to 2.2 cm and the defoaming efficiency reached 92 percent. The optimal concentration of TEGO-106 was 25 ppm.