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1、富氧煤粉燃烧锅炉概念设计研究阎维平,米翠丽华北电力大学教育部/电站设备状态监测与控制0重点实验室,河北保定071003[摘要]以亚临界300MW机组锅炉为研究对象,构建了富氧燃烧锅炉原则性热力系统,并分别从炉膛辐射、对流受热面、尾部受热面、制粉系统及气体污染物的处理与回收等方面进行了富氧燃烧锅炉的概念设计。计算与分析表明,大约35%O2/65%CO2混合气氛下的富氧燃烧锅炉具有明显的优势,锅炉炉膛部分的辐射换热份额大大增加,炉膛辐射换热量较空气燃烧增加约15%;对流换热所占份额减少,相对于空气燃烧减少约19%;锅炉烟气侧的运行阻力大幅度减小;工质在炉膛内的辐射吸热将增加约42%,
2、更多的过热受热面移入炉膛上部,锅炉总的受热面数量低于空气燃烧锅炉;制粉系统磨煤电耗显著降低,磨煤效率提高;锅炉制造成本与运行费用有望较大幅度降低,可部分地弥补由于制氧而增加的成本。[关键词]富氧燃烧;锅炉;概念设计;CO2浓度;CO2捕集[中图分类号]TK224.1[文献标识码]A[文章编号]1002-3364(2011)02-0001-07[DOI编号]10.3969/j.issn.1002-3364.2011.02.001STUDYONCONCEPTUALDESIGNOFUTILITYBOILERBURNINGOXYGEN-ENRICHEDPULVERIZEDCOALYANW
3、eiping,MICuiliKeyLaboratoryofEquipmentss.MonitoringandControlunderEducationalMinistry,NorthChinaElectricPowerUniversity,Baoding071003,HebeiProvince,PRCAbstract::Takingboilerofsupercritical300MWunitastheobjectofstudy,aprinciplethermodynamicsystemforboilerwithoxygen-enrichedcombustionhasbeencon
4、structedandaconceptualdesignofsaidboilerbeingcarriedoutfromaspectsofradiationinthefurnace,heatingsurfaceofconvection,heatingsurfaceintailsection,systemofcoa-lpulverizing,removelandrecoveryofgaseouspollutantsetc..Calculationandanalysisshowthattheboilerwithoxygen-enrichedcombustionhasremarkable
5、surperiotyunderatmosphereofabout35%O2and65%CO2;theshareofradiationheattransferinfur-naceoftheboilerisgreatlyincreased,thequantityofradiationheattransferinthefurnaceincreasedabout15%thanthatofaircombustion;theshareofconvectionheattransferisdecreased,reducing19%ascomparedwithaircombustion;there
6、sistanceatfluegassideinoperationofboilerisgreatlydecreased,theradiationheatabsorptionbyworkingmediuminthefurnacewillincrease42%,moresuperheated基金项目:国家高技术研究发展计划(863计划)基金资助项目5增压流化床富氧燃煤发电新技术6(2009AA05Z310)作者简介:阎维平(1955-),男,汉族,北京人,博士,现为华北电力大学教授,博士生导师,从事高效低污染煤燃烧理论、新能源开发与利用、电站锅炉煤粉燃烧技术和锅炉安全经济运行的教学和研
7、究。1heatingsurfacewillmoveintoupperpartofthefurnace,thetotalareaofheatingsurfaceoftheboilerwilllessthanthatofboilerwithaircombustion;thespecificelectricenergyconsumptionincoa-lpu-lverizingsystemissubstantiallydecreased,enhancingtheefficiencyof
