NaOH液相吸收同时脱硫脱硝的研究  

Experimental study on simultaneous desulfurization and denitrification by NaOH liquid phase absorption

作　　者：陈启项 徐燕[2] 林孝鑫 侯培[3] 吴祖良[3] 

机构地区：[1]杭州职业技术学院,浙江杭州310018 [2]华东理工大学资源与环境工程学院,上海200237 [3]浙江工商大学环境科学与工程学院,浙江杭州310018

出　　处：《能源工程》2016年第5期55-59,共5页Energy Engineering

基　　金：浙江省重大科技项目(2012C03003-2);浙江省大学生科技创新项目(2015R408030);浙江工商大学创新创业项目(cx20153014)

摘　　要：利用鼓泡吸收装置研究NaOH液相吸收同时脱硫脱硝过程,重点分析了SO_2和NO_2在吸收过程中的相互影响机制,得出了以下结论:在NaOH液相吸收同时脱硫脱硝过程中,NaOH能够高效吸收SO_2,而且吸收后生成的Na2SO_3和Na HSO_3能够促进NO_2的脱除,从而取得较高的NO_2脱除率。但是随着反应的进行,NO_2脱除率总体上呈现先增加后减少再增加的趋势;随着NO_2初始浓度的增加,SO_2脱除率基本上维持100%不变;而SO_2初始浓度的增加能够促进NO_2脱除,当SO_2浓度从400 m L/m^3增加到1000 m L/m^3时,NO_2最终稳定时的脱除率从28%增加到了60%,表明SO_2的加入对NO_2脱除具有协同效应。Simultaneous desulfurization and denitrification were studied in a lab-scale bubbling reactor with NaOH as the absorbent,especially the interaction mechanism between NO2 and SO2in the absorption process. The results indicated that NaOH could react with SO2 perfectly. Their reaction products,Na2SO3 and Na HSO3,could promote the removal of NO2,which resulted in a higher NO2 removal rate. However,NO2 removal rate showed a trend of first increasing,and then decreasing,and finally increasing. With the increase of the initial concentration of NO2,the SO2 removal rate remained unchanged at 100%. The increase of SO2 initial concentration had a positive effect on NO2 removal.When the initial concentration of SO2 increased from 400 m L/m3 to 1000 m L/m^3,the removal rate of NO2 increased from 28% to 60%,which indicated that the addition of SO2 had a synergistic effect on the removal of NO2.

关 键 词：NAOH 液相吸收 SO2 NO2 协同效应 

分 类 号：X511[环境科学与工程—环境工程]