凡思軍 吳 磊 劉忠英 姚 劍 馬繼飛 李玉蘭 侯惠奇 謝雷東 陳 堃(中國科學(xué)院上海應(yīng)用物理研究所 嘉定園區(qū) 上海 201800)
?
超聲波增濕撞擊流泡沫捕捉塔處理含鈹廢氣研究
凡思軍吳磊劉忠英姚劍馬繼飛李玉蘭侯惠奇謝雷東陳堃
(中國科學(xué)院上海應(yīng)用物理研究所嘉定園區(qū)上海201800)
摘要采用超聲波霧化除塵技術(shù),研制了最大處理風(fēng)量為300m3·h-1的超聲波增濕撞擊流泡沫捕捉塔含鈹廢氣處理樣機,按照國家標(biāo)準(zhǔn)方法對超聲波增濕撞擊流泡沫塔的進、出氣口進行采樣,使用電感耦合等離子譜儀對其除鈹性能的影響因素進行了研究。結(jié)果表明,霧化加濕量的增加有利于除鈹效率的提高,但同時也使凈化后氣體的絕對濕度增加;超聲波加濕器安裝在距離塔體3m以上方能最大限度地提高除鈹效率;當(dāng)顆粒物粒徑在0.4μm以上時,除鈹效率較高,而在0.4μm以上時,除鈹效率顯著降低;除鈹效率隨進氣口初始鈹濃度而增加;氣體流速的增加有利于提高除鈹效率,但氣體流速過高將導(dǎo)致凈化后氣體絕對濕度顯著增加,最佳氣體流速為12m·s-1。當(dāng)氣體流速為12m·s-1時,最佳塔內(nèi)水位為40cm。研究結(jié)果為超聲波增濕撞擊流泡沫捕捉塔在釷基熔鹽堆(ThoriumMoltenSaltReactor,TMSR)核能系統(tǒng)項目含鈹廢氣上的應(yīng)用提供了實驗依據(jù)。
關(guān)鍵詞超聲波增濕,泡沫捕捉,除鈹效率,絕對濕度,粒徑
Purification of Be-containing offgas by ultrasonic atomization-impinging stream foam tower
FANSijunWULeiLIUZhongyingYAOJianMAJifeiLIYulan HOUHuiqiXIELeidongCHENKun
(Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China)
Abstract Background:LiF-BeF2isusedascoolantsforThoriumMoltenSaltReactor(TMSR).Theoffgasfrom TMSRcontainingberylliumwhichisharmfultobothhumanhealthandtheenvironmentmustbepurifiedbefore beingdischarged. Purpose:Anewtypewetduster-ultrasonicatomization-impingingstreamfoamtower was developed.Methods:Theberylliumremovalpropertieswereinvestigatedbysamplingaccordingtonationalstandards. Theincreaseofatomizationamountishelpfulforimprovingberylliumremovalefficiency.Results:Inorderto controltheabsolutehumidityoffgasafterpurification,theoptimalatomizationamountissetat80mL·min-1.The ultrasonichumidifiershouldbeinstalled3mawayfromthefoamtower. Particleswithdiameterbiggerthan0.4μm canberemovedeffectively.Theberylliumremovalefficiencyofoffgasincreaseswiththeinitialberyllium concentrationandtheoffgasvelocitywhichisoptimizedat12m·s-1.Theoptimalwaterlevelinthetoweris40cm whentheoffgasvelocityis12m·s-1.Conclusion:Theresultsindicatethatultrasonicatomization-impingingstream foamtowerissuitableforpurifyingoffgascontainingberylliuminTMSR.
Key words Ultrasonicatomization,F(xiàn)oamcapture,Berylliumremovalefficiency,Absolutehumidity,Particlesize
中國科學(xué)院戰(zhàn)略先導(dǎo)專項(No.XDA02020400)資助
第一作者:凡思軍,男,1976年出生,2012年于中國科學(xué)院上海光學(xué)精密與機械研究所獲博士學(xué)位
SupportedbytheStrategicPriorityResearchProgramoftheChineseAcademyofSciences(No.XDA02020400)
Firstauthor:FANSijun,male,bornin1976,graduatedfromShanghaiInstituteofOpticsandFineMechanics,ChineseAcademyofScienceswitha doctor’sdegreein2012
釷基熔鹽堆(ThoriumMoltenSaltReactor,TMSR)核能系統(tǒng)項目是中國科學(xué)院先導(dǎo)科技專項之一,其戰(zhàn)略目標(biāo)是研發(fā)第四代裂變反應(yīng)堆核能系統(tǒng)(TMSR核能系統(tǒng))[1-4]。……