Study on Wood Drying Properties under Vacuum-floating Pressure

编号 zgly0000338993

文献类型 期刊论文

文献题名 Study on Wood Drying Properties under Vacuum-floating Pressure

学科分类 220.5540;木材学

作者 ZHANGBiguang  YISonghn  CHANGJianmin  LIXianjun 

作者单位 MaterialScienceandTechnologySchoolofBeijingForestryUniversity  Beijing100083  P.R.China 

母体文献 中国林业科技: 英文版 

年卷期 2004,3(4)

页码 65-71

年份 2004 

分类号 S781.71  S791.24 

关键词 松树  木材干燥  预热特性  真空悬浮压力  干燥速率  干燥条件 

文摘内容 Using Masson pine as specimens, when drying mediums are overheated steam and hot-air respectively, preheating characteristics of wood under vacuum-floating pressure drying are discussed by measurement of internal temperature field and variation of moisture content during period of preheating. The relationship between drying medium conditions and drying rate of wood reveals that, firstly, compared with process of air-drying, time needed to be preheated under vacuum-floating decreased dramatically, meanwhile,the magnitude of condensation on the surface is relatively larger. Secondly, drying rate of wood under vacuum-floating pressure increases coupled with temperature of medium, reduction of absolute pressure,and raise of fluctuation rate of pressure. The sequence of factors contribution to drying rate is listed as following: temperature of medium (t) > fluctuation rate of pressure (f)> absolute pressure (p)。