洁净煤技术
潔淨煤技術
길정매기술
CLEAN COAL TECHNOLOGY
2015年
2期
20-24
,共5页
湿式相变%凝聚%微细颗粒物%除尘
濕式相變%凝聚%微細顆粒物%除塵
습식상변%응취%미세과립물%제진
wet phase change%agglomeration%fine particle%dust removal
为实现微细颗粒物的有效脱除，采用Mastersizer 2000激光粒度仪和低压撞击器对颗粒物进行粒径分析，研究湿式相变冷凝除尘系统对颗粒物的凝聚、脱除性能；通过数值模拟定性考察颗粒物的凝聚作用，预测湿式相变冷凝除尘技术的除尘效果。结果表明，湿式相变冷凝除尘装置入口颗粒物为峰值2.5μm的单峰分布，中间颗粒物为峰值2和30μm的双峰分布，且大颗粒所占比例高于小颗粒，说明存在显著的颗粒物凝并过程。湿式相变冷凝除尘系统对P M10以下的微细颗粒物有较好的脱除效果，各粒级颗粒物的脱除效率均大于70%，0.1~1μm颗粒物脱除效率在85%以上，明显优于传统除尘设备，表明凝并机制使系统对颗粒物有良好的适应性。流场模拟结果显示管排的存在对流场有明显扰动，可促进微细颗粒物的凝并。
為實現微細顆粒物的有效脫除，採用Mastersizer 2000激光粒度儀和低壓撞擊器對顆粒物進行粒徑分析，研究濕式相變冷凝除塵繫統對顆粒物的凝聚、脫除性能；通過數值模擬定性攷察顆粒物的凝聚作用，預測濕式相變冷凝除塵技術的除塵效果。結果錶明，濕式相變冷凝除塵裝置入口顆粒物為峰值2.5μm的單峰分佈，中間顆粒物為峰值2和30μm的雙峰分佈，且大顆粒所佔比例高于小顆粒，說明存在顯著的顆粒物凝併過程。濕式相變冷凝除塵繫統對P M10以下的微細顆粒物有較好的脫除效果，各粒級顆粒物的脫除效率均大于70%，0.1~1μm顆粒物脫除效率在85%以上，明顯優于傳統除塵設備，錶明凝併機製使繫統對顆粒物有良好的適應性。流場模擬結果顯示管排的存在對流場有明顯擾動，可促進微細顆粒物的凝併。
위실현미세과립물적유효탈제，채용Mastersizer 2000격광립도의화저압당격기대과립물진행립경분석，연구습식상변냉응제진계통대과립물적응취、탈제성능；통과수치모의정성고찰과립물적응취작용，예측습식상변냉응제진기술적제진효과。결과표명，습식상변냉응제진장치입구과립물위봉치2.5μm적단봉분포，중간과립물위봉치2화30μm적쌍봉분포，차대과립소점비례고우소과립，설명존재현저적과립물응병과정。습식상변냉응제진계통대P M10이하적미세과립물유교호적탈제효과，각립급과립물적탈제효솔균대우70%，0.1~1μm과립물탈제효솔재85%이상，명현우우전통제진설비，표명응병궤제사계통대과립물유량호적괄응성。류장모의결과현시관배적존재대류장유명현우동，가촉진미세과립물적응병。
In order to remove fine particle effectively,the particle size was analyzed through Mastersizer 2000 and low pressure impactor. The effects of wet phase transition condensate dust removal system on fine particle agglomeration and removal efficiency were investigated using numerical simulation method. The fine particle at the inlet of system was collected. The structure chart showed that there was only one crest and the crest value was 2. 5μm. There were two crests and the crest value was 2,30μm when the sample was collected in the middle of system which indicated that the process existed significant agglomeration. The system worked better for the particle whose size was below 10 μm. For each size fraction,the removal efficiency was above 70%,even above 85% for 0. 1 to 1 μm particle. The wet phase transition condensate dust removal system was much better than traditional dust removal system. The tube rows accelerated the aggregation of fine particles.
