大花序桉干燥特性与干燥工艺研究  

Drying Characteristics and Drying Process of Eucalyptus cloeziana Wood

作　　者：周桥芳[1] 胡传双[1] 涂登云[1] 骆家升 徐美姿 ZHOU Qiao-fang;HU Chuan-shuang;TU Deng-yun;LUO Jia-sheng;XU Mei-zi(South China Agricultural University,Guangzhou Guangdong 510640,China)

机构地区：[1]华南农业大学,广东广州510640

出　　处：《林业机械与木工设备》2018年第1期41-44,51,共5页Forestry Machinery & Woodworking Equipment

基　　金：广西科学研究与技术开发项目"年产5 000 m3家具用桉木指接板开发与应用"(桂科转15247001-22);广东省高等学校优秀青年教师培养计划项目"纳米纤维素增强交叉层积材(CLT)制备关键技术及应用示范"(Yq2013029);华南农业大学大学生科技创新项目(201710564308)

摘　　要：通过百度试验法研究了25年生大花序桉木材的干燥特性,制定其干燥基准,进行干燥工艺优化试验。结果表明:大花序桉初期开裂等级为4级,内裂等级为2级,截面变形等级为2级,干燥速度等级为5级,属中等难干材;采用百度试验法制定的干燥工艺,40 mm厚大花序桉从初含水率48.89%降至9.45%,干燥周期为26天,干燥均匀度较好,厚度上含水率偏差为3.22%,除纵裂外,其他可见干燥缺陷指标均达到国家标准GB/T 6491-2012《锯材干燥质量》规定的一级要求。The drying characteristics of 25-year-old Eucalyptus cloeziana wood are analyzed by using a 100℃ test method,its drying schedule is devleoped,and a drying technology experiment is conducted,with the results showing that initial crack level of Eucalyptus cloeziana wood is Level 4,internal crack level is Level 2,the section deformation level is Level 2 and the drying speed level is Level 5,with its drying difficulty considered as medium; using the drying process developed based on the 100℃ test method,the initial moisture content of 40 mm-thick Eucalyptus cloeziana wood decreased from 48. 89% to 9. 45%,with a drying cycle of 6 days,drying uniformity being good,moisture content deviation in terms of thickness being 3. 22%; except for longitudinal cracks,other visible drying defect indicators reached the requirements of Class 1 of the national standard GB/T 6491-2012 Sawn Timber Drying Quality.

关 键 词：大花序桉 干燥工艺 百度试验法 干燥特性 

分 类 号：S782.31[农业科学—木材科学与技术]