基于MVR技术的单级双效蒸发浓缩系统性能分析
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2020-04-07 19:10:48
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第6卷第1期新能源进展Vol.6No.12018年2月ADVANCESINNEWANDRENEWABLEENERGYFeb.2018*收稿日期:2017-12-11修订日期:2018-02-01基金项目:广东省科技计划项目(2014B050505014,2013B091500088)†通信作者:黄冲,E-mail:huangchong@ms.giec.ac.cn文章编号:2095-560X(2018)01-0036-06基于MVR技术的单级双效蒸发浓缩系统性能分析*李帅旗1,2,3,王汉治1,2,3,黄冲1,2,3†,何世辉1,2,3,宋文吉1,2,3,冯自平1,2,3(1.中国科学院广州能源研究所,广州510640;2.中国科学院可再生能源重点实验室,广州510640;3.广东省新能源与可再生能源研究开发与应用重点实验室,广州510640)摘要:随着我国工业废水行业市场规模与平均处理成本的逐年上升,先进蒸发浓缩技术得到了广泛关注。本文在机械蒸汽压缩机升压能力不断提高的现状基础上,提出机械蒸汽再压缩(MVR)单级双效蒸发浓缩系统,研究物料浓度、蒸发温度、压比、换热温差等对系统热力性能的影响,并通过对比单级压缩机系统,获得单级双效MVR系统的性能分析曲线和节能优势。结果表明,单级双效MVR系统压缩机压比大于1.9时,系统能效系数(COP)可达25以上;在满足蒸汽温升的条件下,系统COP随压缩机压比、蒸发温度升高而降低,压比升高0.1,COP下降4.4%;第一效蒸发温度升高10℃,COP下降3.1%。关键词:单级双效;MVR;耗功;能效系数中图分类号:TK09文献标志码:Adoi:10.3969/j.issn.2095-560X.2018.01.006PerformanceAnalysisofSingle-StageandDouble-EffectEvaporativeConcentrationSystemBasedonMVRTechnologyLIShuai-qi1,2,3,WANGHan-zhi1,2,3,HUANGChong1,2,3,HEShi-hui1,2,3,SONGWen-ji1,2,3,FENGZi-ping1,2,3(1.GuangzhouInstituteofEnergyConversion,ChineseAcademyofSciences,Guangzhou510640,China;2.CASKeyLaboratoryofRenewableEnergy,Guangzhou510640,China;3.GuangdongProvincialKeyLaboratoryofNewandRenewableEnergyResearchandDevelopment,Guangzhou510640,China)Abstract:Theadvancedevaporativeandconcentrationtechnologyreceivesextensiveattentionduetotheincreaseofindustrialwastewatermarketsizeandtheaveragetreatmentcostinourcountrytheseyears.Consideringtheincreasingcapacityofcompressorpressureratio,asingle-stagedouble-effectmechanicalvaporrecompression(MVR)systemwasproposedinthispaper.Theinfluencesofmaterialconcentration,evaporationtemperature,compressionratio,temperaturedifferenceonthethermalperformanceofsingle-stageanddouble-effectMVRsystemwerestudiedindetail.Theperformanceanalysiscurveandenergy-savingadvantagesofsingle-stageanddouble-effectMVRsystemwereobtainedbycomparingwiththesinglestagesystem.TheresultsshowedthattheCOPofthesingle-stageanddouble-effectMVRsystemreached25whenthepressureratiowashigherthan1.9;theCOPdecreasedsignificantlywiththeincreaseofthepressureratioa
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