人工林柚木间伐材过热蒸汽干燥工艺研究  

Study on Intermediate Cutting Plantation Teak Super-heated Steam Drying Technology

作　　者：向瑶 允帅 刘文金[1] 孙德林[1] 郝晓峰[1] XIANG Yao;YUN Shuai;LIU Wen-jin;SUN De-lin;HAO Xiao-feng(College of Material Science and Engineering,Central South University of Forestry and Technology,Changsha 410004,Hunan,P.R.China)

机构地区：[1]中南林业科技大学材料科学与工程学院,湖南长沙410004

出　　处：《林产工业》2022年第5期8-12,40,共6页China Forest Products Industry

基　　金：“十三五”国家重点研发计划课题“珍贵树种木材家具制造技术集成与示范研究(2017 YFD0601104)”;国家自然科学基金青年项目(31700486);湖南省教育厅优秀青年项目(16B280);湖南省自然科学基金青年项目(2016JJ3185)。

摘　　要：为获得高效节能的柚木干燥工艺,以人工林柚木间伐材为研究对象,系统研究了不同过热蒸汽温度(110、120、130、140℃)对柚木锯材干燥过程中的传热、传质速率及干燥质量的影响规律,获得柚木过热蒸汽干燥预热恒湿应力释放、慢速升温恒速干燥及减速升温减速干燥三个不同阶段的临界干燥温度,分别为110、130℃和120℃。研发了分段梯度控温的柚木过热蒸汽干燥工艺,并进行工厂中试研究。结果表明:使用过热蒸汽干燥能有效提高人工林柚木间伐材的干燥质量,缩短生产周期并降低生产成本。In order to obtain an efficient and energy-saving drying method for intermediate cutting plantation teak wood,taking teak as the research object,the influence on different superheated steam temperatures(110,120,130,140℃)on heat mass transfer rate and dry quality of teak sawn timber were systematically studied.The critical drying temperatures of three different drying stages of teak,moisture preheating stress release stage,slow heating and constant speed drying and slow heating,and deceleration drying were 110,130℃,and 120℃,respectively.A segmented gradient temperature controlled super-heated steam drying process for teak was developed and carry out pilot plant research.The pilot test results showed that the use of superheated steam drying can effectively improve the drying quality of plantation teak,shorten the production cycle time,and reduce the costs of production.

关 键 词：柚木 间伐材 过热蒸汽干燥 传热与传质 中试研究 

分 类 号：TS65[轻工技术与工程]