针对水泥分解炉脱硝系统氨逃逸问题，提出了利用湿法脱硫系统实现水泥工业烟气氨排放达标的方法。通过在水泥窑尾脱硫系统进行试验，研究了湿法脱硫系统对气态NH₃的脱除特性。结果表明，湿法脱硫系统浆液吸收作用能有效脱除烟气中的气态氨。液气比、脱硫浆液pH及浆液中氨氮浓度对尾气中氨逃逸影响较大。增大液气比有利于提高氨脱除效率，在液气比由4.3 L/m³提高到7.0 L/m³时，氨脱除效率由86.0%提高到92.5%；当浆液pH由5.8升高至6.4时，氨脱除效率由94%降低至67%；氨氮浓度由4.03×10³ mg/L升高至4.06×10³ mg/L时，氨脱除效率由91.9%降低至86.0%。

Aiming at the problem that ammonia escapes from the denitration system of cement decomposing furnace, a method is proposed to control the escaped ammonia by using a wet desulfurization system, making the ammonia emission in flue gas of cement industry reach China's national standard.Through performing experiments on the desulfurization system for flue gas of cement kiln, the removal characteristics of gaseous ammonia by wet desulfurization system are studied.The results show that the slurry absorption of wet desulfurization system can effectively remove gaseous ammonia from flue gas.The liquid-to-gas ratio, the pH value of the desulfurization slurry and the concentration of ammoniacal nitrogen in the slurry have a greater impact on the escape of ammonia in the flue gas.A higher liquid-to-gas ratio is beneficial to improve the removal efficiency of ammonia.The removal efficiency of ammonia increases from 86% to 92.5% when the liquid-to-gas ratio increases from 4.3 L·m^-3 to 7.0 L·m^-3;the removal efficiency drops from 94% to 67% when the pH of slurry increases from 5.8 to 6.4;it drops from 91.9% to 86% when the concentration of ammoniacal nitrogen increases from 4 030 mg·L^-1 to 4 060 mg·L^-1.

刘定平(1965-),男,博士,副教授,研究方向为能源清洁转化与系统优化,liudingping@123.com