过热蒸汽干燥乏汽余热利用技术  

EXHAUST GAS HEAT UTILIZATION TECHNOLOGY IN SUPERHEATED STEAM DRYING: A REVIEW

作　　者：温祥东 张绪坤[1] 邹加富 姚斌[1] 

机构地区：[1]南昌航空大学机电设备研究所,南昌330063

出　　处：《环境工程》2016年第1期145-149,共5页Environmental Engineering

基　　金：国家自然科学基金(51168038);江西省科技计划重大项目(2015ACG70012)

摘　　要：干燥是一个高能耗的操作过程,降低能耗是提高整个干燥系统能量利用效率的关键。文中阐述了过热蒸汽特性及干燥节能的本质与途径,指出过热蒸汽干燥成功实现节能的关键是如何经济地利用干燥过程产生的多余乏汽。并对传统热回收、多级干燥、机械蒸汽再压缩、自回热四种乏汽利用技术进行了分析比较,指出了各项技术的优缺点,最后对过热蒸汽干燥过程节能进行了总结。基于火用回收的自回热过热蒸汽干燥具有广阔的前景。Drying is a high energy-consuming operation,and reducing the energy consumption of drying process is the key factor to improve the energy utilization efficiency of the whole drying system. The characteristics of superheated steam and the essence and approaches of energy conservation in drying are described in this article,indicating that the significant point in energy saving of the superheated steam drying is economical usage of the excess exhaust gas. In addition,four kinds of exhaust gas using technologies,which include the conventional heat recovery,multistage drying,mechanical vapor recompression and self-heated recuperation,are analyzed and compared. In the end,the drying process energy saving of superheated steam is summarized. The superheated steam drying using self-heated recuperation technology based on exergy recuperation is a promising technology.

关 键 词：过热蒸汽 节能 热回收 自回热 

分 类 号：TB4[一般工业技术] TK115[动力工程及工程热物理—热能工程]