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High-Temperature Drying Characteristics of Wood during Boiling-In-Oil Process

Lee, Hyoung Woo   (Inst. of Agri. Sci & Tech., College of Agriculture, Chonnam Nat'l Univ.  ); Choi, Nak Ju   (Inst. of Agri. Sci & Tech., College of Agriculture, Chonnam Nat'l Univ.  );
  • 초록

    Boiling-in-oil process was performed to investigate the high-temperature drying characteristics of 25, 50, and 70 mm-thick flat-sawn Douglas-fir lumber. Drying rates, moisture profiles and temperature profiles were monitored. Fully refined paraffin wax was used as drying agent and heated to $130^{\circ}C$ . Average drying rates of 25, 50, and 70 mm-thick specimen were 11.6, 6.7, 5.0%/h, respectively. The moisture content differences between cores and ends were 1~2% in 25 mm-thick and 200 mm-long sample and over 10% in 50 mm-thick and 600 mm-long sample.


  • 주제어

    wood drying .   boiling-in-oil process .   Douglas-fir (Pseudotsuga menziesii) .   high-temperature drying .   drying characteristics.  

  • 참고문헌 (7)

    1. McDonald, D. 1958. Method of drying and impregnating wood. U.S. Patent No. 2,860,070 
    2. McMillen, J. M. 1961. Special methods of seasoning wood: Boiling in oily liquids. USDA Forest Service Forest Products Laboratory Rep. 1665 
    3. Yoshida, T. 1993. Test of drying squared lumber in the kerosene liquid. Paper presentation of the Japan Wood Research Society, 211 
    4. Barksdale, B. E. Sr. 1949. Apparatus for drying lumber. U.S. Patent No. 2,464,429 
    5. Matsuoka, Y., S. Fujiwara, and Y. Kanagawa. 2001. Penetration properties of paraffin into sugi structural timbers in drying by high temperature liquid. Proceedings on the 7th International IUFRO Wood Drying Conference: 162-167 
    6. Cai, Y., K. Hayashi, and H. Liu. 2005. New monitoring concept of moisture content distribution in wood during high temperature drying. Proceedings on the 9th International IUFRO Wood Drying Conference: 172-177 
    7. Kang, W., H. W. Lee, and W. Y. Chung. 2005. Three-dimensional distribution and variation of moisture content of boxed-heart square timber of Pinus densiflora during drying. Journal of the Korean Wood Science and Technology 34(1): 7-14     

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