Microwave drying <em>properties of Pinus</em> massoniana lumber

LIU Zhi-jun; LI Yan-jun; ZHANG Bi-guang; LIU Zhi

Volume 23 Issue 5

Feb. 2017

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LIU Zhi-jun, LI Yan-jun, ZHANG Bi-guang, LIU Zhi. Microwave drying properties of Pinus massoniana lumber[J]. Journal of Zhejiang A&F University, 2006, 23(5): 482-485.

Citation:

LIU Zhi-jun, LI Yan-jun, ZHANG Bi-guang, LIU Zhi. Microwave drying properties of Pinus massoniana lumber[J]. Journal of Zhejiang A&F University, 2006, 23(5): 482-485.

Microwave drying properties of Pinus massoniana lumber

1.
Faculty of Wood Science and Engineering , Hebei Agricultural University , Baoding 071000, Hebei , China;
2.
School of Material Science and Technology , Beijing Forestry University , Beijing 100083, China;
3.
School of Engineering , Zhejiang Forestry College , Lin'an 311300, Zhejiang , China

Funds:

国家自然科学基金资助项目(598760005)

Received Date: 2005-10-28
Rev Recd Date: 2006-01-17
Publish Date: 2006-10-20

Abstract

The variational regularity of drying rate , temperature and moisturedistribution with time during wood microwave drying was studied.The objective is to provide the theoretic accordance for microwave drying technology.The results show that the continuous microwave drying process can be divided into three stages :accelerating (speed-up) stage , constant-speed stage and speed-down stage .The constant-speed stage occupied the largest proportion .In the microwave drying process , temperature change process can be divided into coming-up stage ,isothermal stage , and late coming-up stage .The temperature inside of the lumber was even both in coming-up stage and isothermal stage , and in the latter coming-up stage , the wood temperature was increased , and so as the temperature difference .The original moisture content gradient was not raised but was averaged in the whole cross section , and the surface moisture content was increased .[ Ch , 6 fig .10 ref .
- forest engineering,
- Pinus massoniana,
- microwave drying,
- drying properties,
- moisture content gradient

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Microwave drying properties of Pinus massoniana lumber

1. Faculty of Wood Science and Engineering , Hebei Agricultural University , Baoding 071000, Hebei , China;

2. School of Material Science and Technology , Beijing Forestry University , Beijing 100083, China;

3. School of Engineering , Zhejiang Forestry College , Lin'an 311300, Zhejiang , China

Funds:

国家自然科学基金资助项目(598760005)

Received Date: 2005-10-28

Rev Recd Date: 2006-01-17

Publish Date: 2006-10-20

Key words:

Abstract: The variational regularity of drying rate , temperature and moisturedistribution with time during wood microwave drying was studied.The objective is to provide the theoretic accordance for microwave drying technology.The results show that the continuous microwave drying process can be divided into three stages :accelerating (speed-up) stage , constant-speed stage and speed-down stage .The constant-speed stage occupied the largest proportion .In the microwave drying process , temperature change process can be divided into coming-up stage ,isothermal stage , and late coming-up stage .The temperature inside of the lumber was even both in coming-up stage and isothermal stage , and in the latter coming-up stage , the wood temperature was increased , and so as the temperature difference .The original moisture content gradient was not raised but was averaged in the whole cross section , and the surface moisture content was increased .[ Ch , 6 fig .10 ref .

Microwave drying properties of Pinus massoniana lumber

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Proportional views

通讯作者: 陈斌, bchen63@163.com

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Microwave drying properties of Pinus massoniana lumber

1. Faculty of Wood Science and Engineering , Hebei Agricultural University , Baoding 071000, Hebei , China;

2. School of Material Science and Technology , Beijing Forestry University , Beijing 100083, China;

3. School of Engineering , Zhejiang Forestry College , Lin'an 311300, Zhejiang , China

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Microwave drying properties of Pinus massoniana lumber

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通讯作者: 陈斌, bchen63@163.com

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Microwave drying properties of Pinus massoniana lumber

1. Faculty of Wood Science and Engineering , Hebei Agricultural University , Baoding 071000, Hebei , China; 2. School of Material Science and Technology , Beijing Forestry University , Beijing 100083, China; 3. School of Engineering , Zhejiang Forestry College , Lin'an 311300, Zhejiang , China

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1. Faculty of Wood Science and Engineering , Hebei Agricultural University , Baoding 071000, Hebei , China;

2. School of Material Science and Technology , Beijing Forestry University , Beijing 100083, China;

3. School of Engineering , Zhejiang Forestry College , Lin'an 311300, Zhejiang , China