超声波和汽蒸预处理对桉木干燥速率的影响
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摘要
对巨尾桉木材分别进行超声波、汽蒸预处理,分析预处理前后桉木干燥速率的变化。结果表明,超声波和汽蒸预处理均可加快桉木的干燥速率,且随超声波频率的增加和汽蒸处理温度的升高而明显提高;两种预处理方式中,汽蒸预处理对桉木干燥速率和干燥质量的改善效果更明显。
Eucalyptus wood samples were treated by ultrasonic and steaming, respectively. The drying rate of the wood samples, before and after pretreatment, were compared and analyzed. The results showed that both ultrasonic and steam pretreatment could be used to speed up drying rate, which were significantly improved by increasing the ultrasonic frequency and/or raising the steaming temperature. Effect of steaming pretreatment on the drying rate and drying quality for the Eucalyptus wood samples was better than that of ultrasonic pretreatment.
Eucalyptus wood samples were treated by ultrasonic and steaming, respectively. The drying rate of the wood samples, before and after pretreatment, were compared and analyzed. The results showed that both ultrasonic and steam pretreatment could be used to speed up drying rate, which were significantly improved by increasing the ultrasonic frequency and/or raising the steaming temperature. Effect of steaming pretreatment on the drying rate and drying quality for the Eucalyptus wood samples was better than that of ultrasonic pretreatment.
引文
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[2]邱墅,王振宇,何正斌,等.超声波预处理对杨木试件干燥特性的影响[J].东北林业大学学报,2016,44(2):35-38.
[3]He Z,Fei Y,Peng Y,et al.Ultrasound-assisted vacuum drying of wood:effects on drying time and product quality[J].Bioresources,2013,8(1):855-863.
[4]He Z,Fei Y,Yi S,et al.Effect of ultrasound pretreatment on vacuum drying of chinese catalpa wood[J].Drying Technology,2012,30(15):1750-1755.
[5]杨飞,何正斌,赵阳,等.超声波一真空协同干燥自由水迁移速率[J].东北林业大学学报,2012,40(12):103-107.
[6]何正斌,郭月红,伊松林,等.木材超声波-真空协同干燥的动力学研究[J].北京林业大学学报,2012,34(2):133-136.
[7]杨国强.巨尾桉汽蒸工艺的研究与优化[D].北京:北京林业大学,2016.
[8]Simal S,Benedito J,Sánchez E S,et al.Use of ultrasound to increase mass transportrates during osmotic dehydration[J].Journal of Food Engineering,1998,36(3):323-336.
[9]赵之平,陈澄华.超声传质过程机理[J].化工设计,1997(6):33-38.
[10]魏思文,苗平,王晓敏.汽蒸预处理对速生杨干燥速度的影响[J].林产工业,2011,38(4):23-25.
[11]王晓敏.两种常用速生阔叶材的渗透性及其改善的研究[D].南京:南京林业大学,2010.
[12]郑丽霞.水热预处理对巨尾桉板材性能的影响[D].福州:福建农林大学,2008.
[13]张琳,顾汉泉,高仁孝.辐射对纤维素结晶度的影响[J].火炸药学报,2002,25(1):76-77.