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林业科学 ›› 2012, Vol. 48 ›› Issue (9): 127-131.doi: 10.11707/j.1001-7488.20120920

• 论文 • 上一篇    下一篇

人工林落叶松髓心方材的高频真空干燥

李晓玲1, 高瑞清1, 构涛1, 张立宾1, 陈章景2   

  1. 1. 中国林业科学研究院木材工业研究所 北京 100091;2. 弗吉尼亚理工大学木材科学与林产品系 费吉尼亚 24060
  • 收稿日期:2011-11-02 修回日期:2012-05-23 出版日期:2012-09-25 发布日期:2012-09-25
  • 通讯作者: 高瑞清

Radio Frequency/Vacuum Drying for Boxed-Heart Square Timber of Plantation Larch

Li Xiaoling1, Gao Ruiqing1, Gou Tao1, Zhang Libin1, Chen Zhangjing2   

  1. 1. Research Institute of Wood Industry, CAF Beijing 100091;2. Dept. of Wood Science and Forest Products, Virginia Tech Blacksburg, VA 24060
  • Received:2011-11-02 Revised:2012-05-23 Online:2012-09-25 Published:2012-09-25

摘要:

对截面尺寸为100 mm×100 mm 的人工林落叶松髓心方材进行系列高频真空干燥试验,分析研究不同高频真空干燥条件下干燥质量和干燥速度的变化规律,获得合理的高频真空干燥工艺基准;为了进一步减少试材表裂,干燥前对试材进行切口和过热蒸汽预处理。结果表明: 沿试材长度方向的中心位置切口和过热蒸汽预处理都能有效减少试材表裂,提高干燥质量。

关键词: 高频真空干燥, 人工林落叶松, 髓心方材, 切口处理, 过热蒸汽处理

Abstract:

A series of radio frequency/vacuum (RF/V) drying tests were conducted on boxed-heart square timber of plantation larch with cross section of 100 mm×100 mm. Drying processes under various RF/V conditions were analyzed in terms of drying quality and drying rate. Kerfing and superheated-steam pretreatment were introduced during the process in order to minimize the surface checks. High drying quality has been achieved with optimizing the drying conditions. The run-through kerf and superheated-steam pretreatment at the temperature of 105 ℃ could significantly reduce the surface check occurred during the drying.

Key words: radio frequency/vacuum (RF/V) drying, plantation larch, boxed-heart square timber, kerf pretreatment, superheated-steam pretreatment

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