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1、第7卷第2期环境污染治理技术与设备Vol.7,No.22006年2月TechniquesandEquipmentforEnvironmentalPollutionControlFeb.2006粗媒体颗粒流化床半干法烟气脱硫11213张丽马鸿宾马志宇刘云义(1.沈阳化工学院化学工程学院,沈阳110142;2.建设部沈阳煤气热力研究设计院,沈阳110026)摘要开发了粗媒体颗粒流化床半干法烟气脱硫技术。在流化床内加入惰性粗媒体颗粒,改善脱硫剂与烟气的接触,延长脱硫剂在床内的停留时间,促进脱硫反应进行,提高脱硫效率和脱硫剂
2、利用率。以工业用石灰石为脱硫剂,实验研究了粗媒体颗粒的加入量及其他操作条件对此过程脱硫效率的影响。结果表明:随着粗媒体颗粒粒径减小及床内加入量增加,烟气脱硫效率提高;随着Ca/S增大、饱和接近度降低、空速及脱硫剂颗粒粒径减小,脱硫效率提高。当粗媒体颗粒的-1静止床高为122mm,饱和接近度为15～18℃、空速为2850h、钙硫比为1.0～1.1、脱硫剂粒径为64μm时,脱硫效率可达90%以上。关键词烟道气脱硫流化床二氧化硫中图分类号X70113文献标识码A文章编号100829241(2006)0220057205Fl
3、uegasdesulfurizationbyasemidryprocesswithcoarseparticlefluidizedbed1121ZhangLiMaHongbinMaZhiyuLiuYunyi(1.DepartmentofChemicalEngineering,ShenyangInstituteofChemicalTechnology,Shenyang110142;(2.ShenyangGasHeatResearchandDesignInstituteofConstructionMinistry,Shen
4、yang110026)AbstractAnewtypeoffluegasdesulfurizationtechnology,removalofSO2fromfluegasbyasemidryprocessincoarseparticlefluidizedbed(CPFB),wasdeveloped.Inthisprocesscoarseparticleswereaddedintoafluidizedbedinwhichthedesulfurizationabsorbentparticleswerepromotedto
5、contactwithfluegasbythecoarseparticles.Accordingly,thereactionbetweentheabsorbentandSO2wasimproved,andhighdesulfuriza2tionefficiencycanbeobtained.Intheexperiments,limestoneslurrywasusedasthedesulfurizationabsorbent.Theeffectsofthestaticheightofthecoarseparticle
6、sinthebedandotheroperationconditionsondesulfurizationefficiencywereinvestigated.Experimentalresultsshowedthat:desulfurizationefficiencyincreaseswiththein2creasingoftheheightofcoarseparticlesinthebed,themolarratioofCatoSandtheinletconcentrationofSO2increasing,an
7、dwiththedecreasingofthediameterofthecoarseparticles,thespacevelocityofsimulatedfluegasandtheapproachingsaturationtemperatureandthediameterofabsorbent.Basedontheobservation,whenthestaticheightofthecoarseparticlesinthebedis122mm,themolarratioofCatoSis1.0～1.1,thea
8、p2-1proachingtosaturationtemperatureis15～18℃,thespacevelocityoffluegasis2850h,andthediameterofabsorbentis64μm,desulfurizationefficiencyisover90%.Keywordsfluegas;desulfurizat
