过热蒸汽预处理对落叶松方材高频/真空干燥质量的影响  

Effect of Superheated Steam Pretreatment on Drying Quality of Larch Square during Radio Frequency/Vacuum Drying

作　　者：高瑞清[1,2] 李晓玲[1,2] 构涛[1,2] 张立宾[1,2] 何清慧[1,2] 

机构地区：[1]中国林科院木材工业研究所 [2]国家林业局木材科学与技术重点实验室,北京100091

出　　处：《木材工业》2010年第3期38-40,47,共4页China Wood Industry

基　　金：中国林科院木材工业研究所基本科研业务费专项资金项目(CAFINT2007C09)

摘　　要：对落叶松髓心方材采用不同温度的过热蒸汽预处理,再利用前期试验得出的高频/真空干燥参数进行试验。结果表明,采用常压105℃过热蒸汽预处理31 h,高频/真空干燥后试材的表裂明显减少,且终含水率分布更加均匀;过热蒸汽预处理工艺使高频/真空干燥周期有所延长,但综合考虑干燥周期和干燥质量,认为此工艺具有可行性。Different temperatures of superheated steam were used to pre-treat boxed-heart larch lumber.A series of radio frequency vacuum drying tests were then conducted on the pretreated lumber.The results showed that the number and the total length of surface checks decreased considerably in the samples pretreated under 105 ℃ atmospheric superheated steam for 31 hours.We also observed that the final moisture content distribution was more uniform with the pretreatment.Based on the drying cycle and drying quality,we concluded that the superheated steam pretreatment was feasible for mills even though it required a longer drying cycle.

关 键 词：落叶松 高频真空干燥 髓心方材 过热蒸汽 预处理 

分 类 号：S782.31[农业科学—木材科学与技术]