本文主要研究内容
作者贾真（2019）在《物源性过热蒸汽联合余热回收节能干燥系统设计与试验》一文中研究指出：针对现有过热蒸汽干燥装备存在的设备系统复杂、需另设过热蒸汽发生装置、尾气难以高效回收利用及降速干燥阶段产品品质变差等问题,本文研究设计了一套以物料作为蒸汽发生源的过热蒸汽联合余热回收节能干燥系统。该系统主要由物源性过热蒸汽干燥系统和余热回收节能干燥系统组成,其中物源性过热蒸汽干燥系统是以物料自身作为蒸汽源,即物料在高温环境中,自身水分受热蒸发形成蒸汽,随着干燥的进行,干燥室内原有介质(热空气)介质最终转变为过热蒸汽并作为干燥介质,去除物料中剩余水分;物源性过热蒸汽干燥阶段排出的尾气进入余热回收节能干燥系统的紧凑型换热器中,尾气余热冷凝释放热量,并通过换热器向外传递热量,因此在余热回收节能干燥系统中,紧凑型换热器作为―热源‖,干燥物料,实现了潜热的回收利用。在物源性过热蒸汽联合余热回收节能干燥系统基础上,以海带为原料,研究了海带干燥特性,并借助数学手段对海带内水分迁移及热量传递过程进行数值模拟和分析;并以干燥能耗和产品品质为指标,对热风干燥与物源性过热蒸汽联合余热回收节能干燥系统进行对比分析,以评价物源性过热蒸汽联合余热回收节能干燥系统的应用价值。本论文研究开展的主要内容和结论如下:1、设计了一套物源性过热蒸汽联合余热回收节能干燥系统。详细介绍和分析了干燥系统的设计思路、整体结构和工作原理,并对系统中加热器、风机、导流板、换热器等配件进行选型设计;与现有的过热蒸汽干燥设备相比,该系统无需另设过热蒸汽发生装置,操作简单、安全,且实现了物源性过热蒸汽干燥室尾气潜热的高效回收利用,具有很好的应用和推广价值。2、研究设计紧凑型换热器设计并对其传热性能和干燥理论进行分析计算。运用流体力学分析软件Fluent对换热管内部温度场、速度场、冷凝水体积分布进行仿真模拟。为了提高紧凑型换热器回收余热的利用率,对不同干燥方式的热量传递和质量扩散以及热量利用率进行理论分析和计算,以确定最优干燥方案。3、研究了海带热力学特性参数。分析温度、水分含量对海带热导率、热扩散系数及比热容的影响,并建立了海带各项热力学特性与温度、水分含量的预测模型,为海带在过热蒸汽干燥过程内部传热传质规律的研究,奠定基础。4、对海带干燥特性及干燥动力学的研究。通过薄层干燥实验,研究海带在物源性过热蒸汽干燥室内干燥时,海带的干燥特性,结果表明随着干燥温度的升高,海带干燥速度越快,耗时越短;获得海带的水分有效扩散系数与温度变化关系式;海带干燥过程所需活化能为26.19kJ/mol。利用8种常用薄层干燥数学模型对海带干燥曲线进行非线性拟合,结果表明Midilli and Kucuk模型能够较好地描述海带在物源性过热蒸汽干燥室内干燥时,海带水分比随时间的变化规律。5、理论分析了海带在物源性过热蒸汽干燥室内干燥时,干燥室内介质变化过程。根据介质转变过程,将海带在物源性过热蒸汽干燥过程分为两个阶段,为了研究海带在干燥室内的干燥机理,分阶段建立了海带一维传热传质数学模型,并采用有限差分法及Matlab软件编程,求解传热传质和边界条件的控制方程,同时将模型计算结果与试验所获数据进行比较,结果表明,所建数学模型可真实反映海带在过热蒸汽干燥室内干燥过程水分迁移和能量传递规律。6、通过试验与理论计算,对比分析物源性过热蒸汽联合余热回收节能干燥系统与热风干燥对海带物理品质和干燥能耗的影响。在色泽、收缩性和复水性方面,物源性过热蒸汽联合余热回收节能干燥系统均优于热风干燥;在能量消耗方面,干燥相同质量的海带,物源性过热蒸汽联合余热回收节能干燥系统的总能耗比热风干燥节省44.29%,而在理论上,可节省55.79%的能量。
Abstract
zhen dui xian you guo re zheng qi gan zao zhuang bei cun zai de she bei ji tong fu za 、xu ling she guo re zheng qi fa sheng zhuang zhi 、wei qi nan yi gao xiao hui shou li yong ji jiang su gan zao jie duan chan pin pin zhi bian cha deng wen ti ,ben wen yan jiu she ji le yi tao yi wu liao zuo wei zheng qi fa sheng yuan de guo re zheng qi lian ge yu re hui shou jie neng gan zao ji tong 。gai ji tong zhu yao you wu yuan xing guo re zheng qi gan zao ji tong he yu re hui shou jie neng gan zao ji tong zu cheng ,ji zhong wu yuan xing guo re zheng qi gan zao ji tong shi yi wu liao zi shen zuo wei zheng qi yuan ,ji wu liao zai gao wen huan jing zhong ,zi shen shui fen shou re zheng fa xing cheng zheng qi ,sui zhao gan zao de jin hang ,gan zao shi nei yuan you jie zhi (re kong qi )jie zhi zui zhong zhuai bian wei guo re zheng qi bing zuo wei gan zao jie zhi ,qu chu wu liao zhong sheng yu shui fen ;wu yuan xing guo re zheng qi gan zao jie duan pai chu de wei qi jin ru yu re hui shou jie neng gan zao ji tong de jin cou xing huan re qi zhong ,wei qi yu re leng ning shi fang re liang ,bing tong guo huan re qi xiang wai chuan di re liang ,yin ci zai yu re hui shou jie neng gan zao ji tong zhong ,jin cou xing huan re qi zuo wei ―re yuan ‖,gan zao wu liao ,shi xian le qian re de hui shou li yong 。zai wu yuan xing guo re zheng qi lian ge yu re hui shou jie neng gan zao ji tong ji chu shang ,yi hai dai wei yuan liao ,yan jiu le hai dai gan zao te xing ,bing jie zhu shu xue shou duan dui hai dai nei shui fen qian yi ji re liang chuan di guo cheng jin hang shu zhi mo ni he fen xi ;bing yi gan zao neng hao he chan pin pin zhi wei zhi biao ,dui re feng gan zao yu wu yuan xing guo re zheng qi lian ge yu re hui shou jie neng gan zao ji tong jin hang dui bi fen xi ,yi ping jia wu yuan xing guo re zheng qi lian ge yu re hui shou jie neng gan zao ji tong de ying yong jia zhi 。ben lun wen yan jiu kai zhan de zhu yao nei rong he jie lun ru xia :1、she ji le yi tao wu yuan xing guo re zheng qi lian ge yu re hui shou jie neng gan zao ji tong 。xiang xi jie shao he fen xi le gan zao ji tong de she ji sai lu 、zheng ti jie gou he gong zuo yuan li ,bing dui ji tong zhong jia re qi 、feng ji 、dao liu ban 、huan re qi deng pei jian jin hang shua xing she ji ;yu xian you de guo re zheng qi gan zao she bei xiang bi ,gai ji tong mo xu ling she guo re zheng qi fa sheng zhuang zhi ,cao zuo jian chan 、an quan ,ju shi xian le wu yuan xing guo re zheng qi gan zao shi wei qi qian re de gao xiao hui shou li yong ,ju you hen hao de ying yong he tui an jia zhi 。2、yan jiu she ji jin cou xing huan re qi she ji bing dui ji chuan re xing neng he gan zao li lun jin hang fen xi ji suan 。yun yong liu ti li xue fen xi ruan jian Fluentdui huan re guan nei bu wen du chang 、su du chang 、leng ning shui ti ji fen bu jin hang fang zhen mo ni 。wei le di gao jin cou xing huan re qi hui shou yu re de li yong lv ,dui bu tong gan zao fang shi de re liang chuan di he zhi liang kuo san yi ji re liang li yong lv jin hang li lun fen xi he ji suan ,yi que ding zui you gan zao fang an 。3、yan jiu le hai dai re li xue te xing can shu 。fen xi wen du 、shui fen han liang dui hai dai re dao lv 、re kuo san ji shu ji bi re rong de ying xiang ,bing jian li le hai dai ge xiang re li xue te xing yu wen du 、shui fen han liang de yu ce mo xing ,wei hai dai zai guo re zheng qi gan zao guo cheng nei bu chuan re chuan zhi gui lv de yan jiu ,dian ding ji chu 。4、dui hai dai gan zao te xing ji gan zao dong li xue de yan jiu 。tong guo bao ceng gan zao shi yan ,yan jiu hai dai zai wu yuan xing guo re zheng qi gan zao shi nei gan zao shi ,hai dai de gan zao te xing ,jie guo biao ming sui zhao gan zao wen du de sheng gao ,hai dai gan zao su du yue kuai ,hao shi yue duan ;huo de hai dai de shui fen you xiao kuo san ji shu yu wen du bian hua guan ji shi ;hai dai gan zao guo cheng suo xu huo hua neng wei 26.19kJ/mol。li yong 8chong chang yong bao ceng gan zao shu xue mo xing dui hai dai gan zao qu xian jin hang fei xian xing ni ge ,jie guo biao ming Midilli and Kucukmo xing neng gou jiao hao de miao shu hai dai zai wu yuan xing guo re zheng qi gan zao shi nei gan zao shi ,hai dai shui fen bi sui shi jian de bian hua gui lv 。5、li lun fen xi le hai dai zai wu yuan xing guo re zheng qi gan zao shi nei gan zao shi ,gan zao shi nei jie zhi bian hua guo cheng 。gen ju jie zhi zhuai bian guo cheng ,jiang hai dai zai wu yuan xing guo re zheng qi gan zao guo cheng fen wei liang ge jie duan ,wei le yan jiu hai dai zai gan zao shi nei de gan zao ji li ,fen jie duan jian li le hai dai yi wei chuan re chuan zhi shu xue mo xing ,bing cai yong you xian cha fen fa ji Matlabruan jian bian cheng ,qiu jie chuan re chuan zhi he bian jie tiao jian de kong zhi fang cheng ,tong shi jiang mo xing ji suan jie guo yu shi yan suo huo shu ju jin hang bi jiao ,jie guo biao ming ,suo jian shu xue mo xing ke zhen shi fan ying hai dai zai guo re zheng qi gan zao shi nei gan zao guo cheng shui fen qian yi he neng liang chuan di gui lv 。6、tong guo shi yan yu li lun ji suan ,dui bi fen xi wu yuan xing guo re zheng qi lian ge yu re hui shou jie neng gan zao ji tong yu re feng gan zao dui hai dai wu li pin zhi he gan zao neng hao de ying xiang 。zai se ze 、shou su xing he fu shui xing fang mian ,wu yuan xing guo re zheng qi lian ge yu re hui shou jie neng gan zao ji tong jun you yu re feng gan zao ;zai neng liang xiao hao fang mian ,gan zao xiang tong zhi liang de hai dai ,wu yuan xing guo re zheng qi lian ge yu re hui shou jie neng gan zao ji tong de zong neng hao bi re feng gan zao jie sheng 44.29%,er zai li lun shang ,ke jie sheng 55.79%de neng liang 。
论文参考文献
论文详细介绍
论文作者分别是来自福建农林大学的贾真，发表于刊物福建农林大学2019-08-30论文，是一篇关于过热蒸汽干燥论文,海带论文,余热回收利用论文,传热传质论文,数学模拟论文,节能论文,福建农林大学2019-08-30论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自福建农林大学2019-08-30论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：过热蒸汽干燥论文; 海带论文; 余热回收利用论文; 传热传质论文; 数学模拟论文; 节能论文; 福建农林大学2019-08-30论文;