摘要
为了研究污水污泥常压过热蒸汽干燥特性,研制了一套污泥常压过热蒸汽干燥试验装置,并对常压过热干燥装置主要部件的工作原理及特点进行了介绍。在研制的常压过热蒸汽干燥试验上进行了厚度分别为4,6,10 mm,干燥温度分别为160,220,280℃的干燥试验。试验结果表明:在过热干燥初期出现污泥含水率增大的现象,导致干燥时间增加;但过热蒸汽温度越高、污泥的厚度越薄,干燥至同样含水率所消耗的时间越短,干燥速度也越快。
Combining with the characteristics of sludge and the advantages of superheated steam drying used in high humidity or thermal insensitive material, a superheated steam drying experimental device was designed and fabricated. Main components and working principles of the experimental device were described in this paper. In order to study the drying characteristic of sludge in superheated steam drying, drying experiments were carried out at different superheated steam temperature of 160 ℃ , 220 ℃ and 280 ℃ , and different sludge sample thickness of 4, 6 and 10 mm, respectively. The results showed that the increasing of sludge moisture content in the beginning of the drying process caused a longer drying time. When the superheated steam temperature was higher and the thickness of sludge was thinner, the sludge drying rate was faster and shorter time was needed to dry the sludge to the equivalent moisture.
出处
《环境工程》
CAS
CSCD
北大核心
2015年第7期109-112,126,共5页
Environmental Engineering
基金
国家自然科学基金(51168038)
关键词
污泥
常压
过热蒸汽
干燥
sludge
normal pressure
superheated steam
drying
