东南大学学报（自然科学版）
東南大學學報（自然科學版）
동남대학학보（자연과학판）
JOURNAL OF SOUTHEAST UNIVERSITY
2014年
3期
591-597
,共7页
王恺%钟文琪%曹俊%王志飞%金保癉
王愷%鐘文琪%曹俊%王誌飛%金保癉
왕개%종문기%조준%왕지비%금보단
CaO转化率%初始HCl浓度%反应温度%颗粒粒径
CaO轉化率%初始HCl濃度%反應溫度%顆粒粒徑
CaO전화솔%초시HCl농도%반응온도%과립립경
CaO conversion rate%HCl initial concentration%reaction temperature%particle size
为在中高温下脱除垃圾焚烧烟气中的HCl，在不同初始HCl浓度（450～1500 mg/m3）、反应温度（300～700℃）以及吸附剂粒径（0．15～2 mm）条件下对CaO脱氯特性进行了试验，并采用扫描电子显微镜（SEM）和能谱仪（EDS）对反应过程中的CaO颗粒进行分析．试验结果表明：随初始HCl浓度的减小，CaO对HCl的吸附能力升高，当HCl浓度为750 mg/m3时CaO转化率最高（12．20％），浓度继续减小，CaO转化率不变；随着反应温度升高，CaO转化率呈现先上升后下降的趋势，并在400℃达到峰值；CaO对HCl的吸附能力随粒径的减小而增加，当粒径范围从1～2 mm减小到0．150～0．355 mm时，CaO转化率提高7．78％．由SEM和EDS可见，未反应的CaO表面疏松多孔，随着与HCl反应的进行，颗粒结构变得致密且表面逐渐被反应产物CaCl2所覆盖，当颗粒表面完全被产物层包裹时吸附剂失效．
為在中高溫下脫除垃圾焚燒煙氣中的HCl，在不同初始HCl濃度（450～1500 mg/m3）、反應溫度（300～700℃）以及吸附劑粒徑（0．15～2 mm）條件下對CaO脫氯特性進行瞭試驗，併採用掃描電子顯微鏡（SEM）和能譜儀（EDS）對反應過程中的CaO顆粒進行分析．試驗結果錶明：隨初始HCl濃度的減小，CaO對HCl的吸附能力升高，噹HCl濃度為750 mg/m3時CaO轉化率最高（12．20％），濃度繼續減小，CaO轉化率不變；隨著反應溫度升高，CaO轉化率呈現先上升後下降的趨勢，併在400℃達到峰值；CaO對HCl的吸附能力隨粒徑的減小而增加，噹粒徑範圍從1～2 mm減小到0．150～0．355 mm時，CaO轉化率提高7．78％．由SEM和EDS可見，未反應的CaO錶麵疏鬆多孔，隨著與HCl反應的進行，顆粒結構變得緻密且錶麵逐漸被反應產物CaCl2所覆蓋，噹顆粒錶麵完全被產物層包裹時吸附劑失效．
위재중고온하탈제랄급분소연기중적HCl，재불동초시HCl농도（450～1500 mg/m3）、반응온도（300～700℃）이급흡부제립경（0．15～2 mm）조건하대CaO탈록특성진행료시험，병채용소묘전자현미경（SEM）화능보의（EDS）대반응과정중적CaO과립진행분석．시험결과표명：수초시HCl농도적감소，CaO대HCl적흡부능력승고，당HCl농도위750 mg/m3시CaO전화솔최고（12．20％），농도계속감소，CaO전화솔불변；수착반응온도승고，CaO전화솔정현선상승후하강적추세，병재400℃체도봉치；CaO대HCl적흡부능력수립경적감소이증가，당립경범위종1～2 mm감소도0．150～0．355 mm시，CaO전화솔제고7．78％．유SEM화EDS가견，미반응적CaO표면소송다공，수착여HCl반응적진행，과립결구변득치밀차표면축점피반응산물CaCl2소복개，당과립표면완전피산물층포과시흡부제실효．
In order to remove HCl from waste incineration gas at moderate and high temperature,ex-periments of CaO dechlorination characteristics were carried out under different conditions,including HCl initial concentrations (450 to 1 500 mg/m3 ),reaction temperatures (300 to 700℃),and parti-cle sizes (0.15 to 2 mm),and CaO characteristics in the reaction process were analyzed by scanning electronic microscopy (SEM) and energy dispersive spectrometer (EDS ).Experimental results show that CaO dechlorination capability increases with the decrease of HCl initial concentration,and the CaO conversion rate achieves 12.20%at 750 mg/m3 of HCl concentration,while the conversion rate keeps unchanged with further decrease of HCl concentration.With the increase of the reaction temperature,the CaO conversion rate shows an increasing trend first and then a decreasing trend, and reaches the peak at 400 ℃.The CaO dechlorination capability increases with the reducing of particle size,and the CaO conversion rate improves about 7.78% when the particle size changes from the range of 1 to 2 mm to the range of 0.150 to 0.355 mm.It is shown from SEM and EDS that the surface of unreacted CaO is porous,then the particle structure clusters and is covered with CaCl2 when the reaction is carried out.The adsorbents lose their effectiveness while the particle sur-face is wrapped with reaction product.
