摘要
蒸发器的换热性能对机械蒸汽再压缩(MVR)系统投资及运行均有着重要影响。MVR蒸发器的管内传热与压降性能在基于三维变形管和直圆管的情况下存在明显差异。建立了考虑盐水浓度修正的三维变形管MVR蒸发器性能准则关联式,设计一套用于纤维素生产末端废水零排放项目的新型蒸发器。应用实践表明,相对于传统直圆管的MVR蒸发器,基于三维变形管的新型MVR蒸发器节材节能效果显著,其在节省29%换热面积的情形下仍能完全满足工程实际需要。在现场调研期间MVR系统处理每吨废水的压缩机耗电量在18.81~23.78 kW∙h之间,体现出新型蒸发器高能效的技术特性,极具应用推广价值。
The heat transfer performance of an evaporator significantly impacts on the investment and operation of a mechanical vapor recompression(MVR)system.The in-tube heat transfer and pressure drop performances of MVR evaporators differ significantly between those based on three-dimensional deformed tubes and straight circular tubes.The performance criterion correlation equation of the MVR evaporator with a 3D deformed tube considering the brine concentration correction was established,and a set of new evaporator was designed for the zero wastewater discharge project at the end of cellulose production.Application practice shows that,compared with the traditional straight circular tube MVR evaporator,the new MVR evaporator based on a three-dimensional deformed tube has significant material and energy saving benefits,which can still fully meet the actual needs of the project with a saving of 29%of the heat exchange area.During the on-site investigation,the power consumption of the compressor of the MVR system per ton of wastewater treated was between 18.81 and 23.78 kW∙h,which reflected the high energy-efficiency technical characteristics of the new evaporator,and was of great value for application and promotion.
作者
涂爱民
陈二雄
黄炫杰
朱冬生
刘世杰
TU Aimin;CHEN Erxiong;HUANG Xuanjie;ZHU Dongsheng;LIU Shijie(Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China;CAS Key Laboratory of Renewable Energy,Guangzhou 510640,China;Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development,Guangzhou 510640,China;Guangzhou Schin-Tech Industrial Co.Ltd.,Guangzhou 510320,China)
出处
《新能源进展》
CSCD
北大核心
2024年第1期57-64,共8页
Advances in New and Renewable Energy
基金
国家重点研发计划“可再生能源技术”专项项目(2022YFB4202002)
广州市重点研发计划农业和社会发展科技专题项目(202206010124)。
关键词
MVR蒸发器
三维变形管
强化传热
废水零排放
纤维素生产
MVR evaporator
three-dimensional deformed tube
heat transfer enhancement
zero discharge of wastewater
cellulose production
