煤炭转化2017，Vol.40Issue(3)：70-75,6.
n(Na+)/n(Cl-)对烟气脱氯及脱硫废水零排放的影响
Effect of n(Na+)/n(Cl-) on Semi-dry Dechlorination in Coal-fired Flue Gas to Realize Zero Emission of FGD Waste Water
摘要
Abstract
Semi-dry dechlorination technology is put forward to attach most chlorine in coal-fired flue gas to fly ash by spraying in alkaline solution to realize the zero emission of desulfurization waste water.Simultaneously,drastically reduced FGD (flue gas desulfurization) waste water was used as the solvent of alkali,which could help to realize the target of zero emission of desulfurization waste water.Effects of n(Na+)/n(Cl) on reaction efficiencies of base material with HCl and SO2 were analyzed.It shows that the reaction efficiency of HCl is positively correlated with n(Na+)/n(Cl-).As n(Na+)/n(Cl-) continues increasing,there is a slower growth of HCl reaction efficiency.When n(Na+)/n(Cl) is 4.8,reaction efficiency of HCl increases beyond 70％.For a 660 MW unit,after semi-dry dechlorination,the amount of FGD waste water decreases significantly from 8.01 m3/h to 2.31 m3/h,and the decrease of flue gas temperature is only 2.49 ℃ when waste water is sprayed back as the solvent of alkali.The system of semi-dry dechlorination is simple and the cost is relatively low.There is no significantly negative effect on the comprehensive utilization of fly ash after semi-dry dechlorination.关键词
燃煤烟气/氯化氢/半干法脱氯/脱硫废水/零排放/n(Na+)/n(Cl-)Key words
coal-fired flue gas/hydrogen chloride/semi-dry dechlorination/FGD waste water/zero emission/n(Na+)/n(Cl-)分类
化学化工引用本文复制引用
刘畅,赵虹,滕卫明,耿梓文,邱坤赞,杨建国,袁伟中,陈锡炯..n(Na+)/n(Cl-)对烟气脱氯及脱硫废水零排放的影响[J].煤炭转化,2017,40(3):70-75,6.基金项目
浙江省自然科学基金资助项目(LY15E060002). （LY15E060002）
