氧化度对超重力场净化硝烟效率的影响  

Effect of oxidation ratio on removal efficiency of nitrogen oxides in high gravity field

作　　者：袁志国[1] 刘有智[1] 焦纬洲[1] 祁贵生[1] 

机构地区：[1]中北大学山西省超重力化工工程技术研究中心,山西太原030051

出　　处：《现代化工》2011年第7期79-82,共4页Modern Chemical Industry

基　　金：山西省科技攻关项目资助项目(20090321113);山西省青年科技研究基金资助项目(2007021012)

摘　　要：针对两级旋转填料床强化吸收NOx过程中存在第二级效率低的问题,在两级间设立氧化塔,考察硝烟中NOx的脱除率随氧化度、超重力因子、喷淋密度、气速的影响规律。实验结果表明:NOx浓度越高,达到较高氧化度的时间越短;NOx浓度较低时,氧化度达到50%的氧化时间比较短,但要达到90%则需要较长氧化时间;不同超重力因子、喷淋密度、气速等条件下其脱除率均随氧化度的增加而增加;在较高NOx浓度和氧化度下,脱除率高于常规吸收平衡值的5%。Considering low efficiency problem existed in a second stage NOx absorption enhancement process of the two-stage rotating packed bed（ RPB ） ,the effects of oxidation ratios ,high gravity factors, spraying density and gas velocity on removal efficiency were investigated. The results show that ： higher concentration NOx, shorter the time needed to achieve a higher degree of oxidation, the oxidation degree reaches 50% much quickly when NOx concentration is low, while 90% degree requires longer oxidation time, the removal efficiency increases with the increase of oxidation degrees under different high gravity factors, spray density, gas velocity and other conditions. Besides, at higher concentrations of NOx and oxidation degree ,the removal efficiency is higher than conventional absorption equilibrium value of 5%.

关 键 词：NOx 旋转填料床 吸收 超重力 

分 类 号：TB028[一般工业技术]