资源描述:
《双效气液并流工艺中海水脱硫特性的模拟研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、分类号:密级:UDC:编号:河北工业大学硕士学位论文双效气液并流工艺中海水脱硫特性的模拟研究论文作者:孙双双学生类别:全日制学科门类:工学学科专业:化工过程机械指导教师:张少峰职称:教授资助基金项目:河北省科技计划项目(14273105D)DissertationSubmittedtoHebeiUniversityofTechnologyforTheMasterDegreeofChemicalProcessEquipmentSIMULATIONONDESULFURIZATIONCHARACTERISTICSBYSEAWATERINDOUBLE-EFFECTANDGAS-
2、LIQUIDCOCURRENTFLOWPROCESSbySunShuangshuangSupervisor:Prof.ZhangShaofengMay2015ThisworksupportedbytheScienceandTechnologyPlanProjectsofHebeiProvince.No.14273105D.摘要海水脱硫技术是一种新型湿法脱硫技术,利用海水的弱碱性来吸收SO2,在沿海电厂有着广阔的应用前景。本文利用AspenPlus流程模拟软件,自主建立并流模型,提出并流模型建立方法,并用实验验证了模型的准确性。以单效并流工艺为基础,对河北工业大学发明的新
3、型双效并流海水脱硫工艺进行模拟研究,考察了操作参数对系统脱硫效果的影响,以及排出液pH值的变化规律,考察的参数包括:海水温度,海水碱度,海水量,烟气温度,烟气浓度,烟气量,液气比;并与相同工况下的单效工艺进行了对比分析。结果表明:系统的脱硫效率随着烟气温度、海水温度、烟气浓度、烟气量的升高而降低,随着海水碱度、液气比、海水量的增加而增大;液气比对排出液pH值的影响较显著,排出液pH值随着液气比的增加而增大。工艺参数对单效工艺和双效工艺影响规律基本相同,但是在相同的工况下,双效工艺的效率始终高于单效工艺的脱硫效率,且排出液pH值始终低于单效工艺;双效工艺脱硫效率明显提高,
4、符合双效工艺的设计特点,以期对双效工艺的进一步开发和研究,提供理论依据。关键字:海水脱硫双效气液并流脱硫效率AspenPlusIABSTRACTSeawaterfluegasdesulfurizationtechnologyisanewtypeofwetdesulphurizationtechnologywhichuseweakalkalineofnaturalseawaterabsorbSO2influegas,andhasabroadprospectofapplicationincoastalpowerplants.Inthispaper,usingAspenPlu
5、sprocesssimulationsoftwaretobuildcocurrentflowmodelindependently,themethodstobuildcocurrentflowmodelwasputforward,andtheaccuracyofthemodelwasverifiedbyexperiments.Basedontheprocessofthesingle-effectandgas-liquidcocurrentflow,theprocessofdouble-effectandcocurrentflowresearchedbyhebeiunive
6、rsityoftechnologyweresimulated.TheinfluenceofsomeparametersondesulfurizationefficiencyandpHofthedischargeliquidwerestudied,theparametersinclude:seawatertemperature,seawateralkalinity,seawaterquantity,fluegastemperature,fluegasconcentration,fluegasflow,liquid-gasratio;andcomparedwithsingl
7、e-effectprocessinthesameoperatingparameters.Resultsshowthat:thedesulfurizedefficiencyincrease,asthefluegastemperaturereduce,asseawatertemperaturereduce,asfluegasconcentrationreduce,asfluegasflowreduce,asseawaterquantityincrease,asliquid-gasratioincrease,asseawaterquantity