过热蒸汽间歇干燥酒精糟研究  

Study on drying ethanol draff with intermittent superheated steam

作　　者：陈俊英[1] 马晓建[1] 白丽青[1] 王娟 

机构地区：[1]郑州大学化工与能源学院,河南郑州450001 [2]郑州凯乐生物能有限公司,河南郑州450001

出　　处：《化学工程》2010年第1期14-17,共4页Chemical Engineering(China)

基　　金：国家科技支撑计划课题"秸秆乙醇关键技术研究及产业化示范"(2007BAD66B04)

摘　　要：以高湿物料酒精糟为研究对象,进行了过热蒸汽间歇干燥实验研究。利用自行设计的间歇干燥实验台,酒精糟的初始含水质量分数为66.7%,研究了不同实验条件对干燥速率的影响。结果表明:随着干燥介质温度的升高,干燥速率明显加快;被烘物料质量越少,烘干时间越短;随着物料颗粒直径的减小,恒速段的干燥速率基本不变,而降速段的干燥速率明显增加;过热蒸汽质量流量越大,干燥速率越高。因此随着蒸汽过热度的升高、质量流量的增大,过热蒸汽干燥速率加快,干燥效率越高;随着进料质量的增加、颗粒直径的增大,过热蒸汽干燥速率却有所降低。Intermittent superheated steam drying of ethanol draft was studied with superheated steam drying compartment self-built in the laboratory. The original moisture mass fraction of ethanol grain was 66.7% in the test. The effects of different experimental conditions on drying rate were researched. The results show that when other conditions are the same, the drying rate increases obviously with the increasing of superheated steam temperature, and the drying time decreases as the mass of material drops. With the decreasing of the diameter, the drying rate keeps at the same level in the constant rate period, while the drying grain particles rate increases obviously in the falling rate period. The drying rate increases as the steam mass flow rate rises. So the experiment indicates that the drying rate increases with the increasing of superheated steam temperature and mass flow rate, but decreases with the increasing of grain feeding mass and particle diameter.

关 键 词：过热蒸汽干燥 酒精糟 干燥速率 

分 类 号：TQ028.63[化学工程]