40 mm厚杉木锯材高温干燥工艺研究

周永东; 高鑫; 周凡; 付宗营; 江京辉; 翁翔

doi:10.12326/j.2096-9694.2020063

研究报告 | 浏览量 : 0 下载量: 18 CSCD: 0

PDF
导出
分享
收藏
专辑

40 mm厚杉木锯材高温干燥工艺研究
High-Temperature Drying Technology for 40 mm-Thickness Chinese Fir Lumber
1.中国林业科学研究院木材工业研究所，北京 100091
2021年35卷第2期页码：54-58
DOI： 10.12326/j.2096-9694.2020063

扫描看全文

周永东,高鑫,周凡等.40 mm厚杉木锯材高温干燥工艺研究[J].木材科学与技术,2021,35(02):54-58.

ZHOU Yong-dong,GAO Xin,ZHOU Fan,et al.High-Temperature Drying Technology for 40 mm-Thickness Chinese Fir Lumber[J].Chinese Journal of Wood Science and Technology,2021,35(02):54-58.
周永东,高鑫,周凡等.40 mm厚杉木锯材高温干燥工艺研究[J].木材科学与技术,2021,35(02):54-58. DOI： 10.12326/j.2096-9694.2020063.

ZHOU Yong-dong,GAO Xin,ZHOU Fan,et al.High-Temperature Drying Technology for 40 mm-Thickness Chinese Fir Lumber[J].Chinese Journal of Wood Science and Technology,2021,35(02):54-58. DOI： 10.12326/j.2096-9694.2020063.

摘要

对40 mm厚杉木锯材制定两个高温干燥工艺并进行试验研究，检测和分析干燥周期、干燥速率、锯材干燥质量等指标。干燥工艺I采用高温湿空气进行干燥；干燥工艺II在干燥前期高含水率阶段采用过热蒸汽条件，干燥后期低含水率阶段采用高温湿空气进行干燥。结果显示：两个干燥工艺在各阶段的干燥速率差异明显，干燥前期工艺II的干燥速率为1.30%/h，较工艺I低约37.2%；但干燥后期工艺II的干燥速率为1.89%/h，较工艺I高约70.27%。干燥工艺II可以有效避免锯材内裂的发生，干燥质量满足GB/T 6491—2012《锯材干燥质量》二级材的指标要求，干燥效率提高。

Abstract

40 mm-thickness Chinese fir lumber was dried with two schedules of high-temperature drying (HTD) technology respectively. The medium of drying schedules was distinct: Schedule I applied high-temperature humid air in all drying processes, while schedule II applied the superheated steam (SHS) as the drying medium in the early drying stage when the moisture content (MC) of wood was high, then high-temperature humid air in the later stage when MC decreased. The drying duration, the drying rate, and the drying quality of two types of HTD schedules were measured and analyzed. The results showed that the drying rate was different at the various stages of the two drying schedules; that of Schedule II in the early stage of drying was 1.30%/h, which was 37.2% lower than Schedule I; and that of Schedule II in the latter stage of drying was 1.89%/h, being 70.27% higher than Schedule I. Under the conditions of schedule II, internal checks were effectively avoided. The drying quality of 40 mm-thickness Chinese fir lumber by Schedule II met the requirements of the 2,nd, grade in the national standard GB/T 6491—2012 ",Lumber Drying Quality,".

关键词

杉木锯材高温干燥过热蒸汽

Keywords

Chinese Firtimberhigh-temperature dryingsuperheated steam

references

国家林业和草原局. 中国森林资源报告(2014—2018)[M].北京: 中国林业出版社, 2019: 28-29.

蒋佳荔, 吕建雄. 干燥处理杉木木材的干缩湿胀性质[J].中南林业科技大学学报, 2012, 32(6): 152-157.

JIANG J L, LYU J X. Shrinkage-swelling properties of dried Chinese fir woods[J].Journal of Central South University of Forestry & Technology, 2012, 32(6): 152-157.

鲍咏泽, 周永东. 柳杉锯材过热蒸汽干燥与常规干燥的比较[J].林业科学, 2017, 53(1): 88-93.

BAO Y Z, ZHOU Y D. Comparation between superheated steam drying and conventional drying of Chinese cedar lumber[J].Scientia Silvae Sinicae, 2017, 53(1): 88-93.

侯俊峰, 鲍永泽, 周永东. 过热蒸汽预处理对50mm厚杨木锯材常规干燥的影响[J].林业科学, 2018, 54(2): 131-136.

HOU, J F, BAO Y Z, ZHOU Y D. Effects of superheated steam pretreatment on conventional drying of 50 mm-thickness Poplar lumber[J].Scientia Silvae Sinicae, 2018, 54(2): 131-136.

鲍咏泽, 周永东. 过热蒸汽干燥对50 mm厚柳杉锯材质量及微观构造的影响[J].东北林业大学学报, 2016, 44(4): 66-68, 73.

BAO Y Z, ZHOU Y D. Effect of superheated steam drying of 50-mm-thickness Chinese Cedar lumber on wood quality and micro-structure[J].Journal of Northeast Forestry University, 2016, 44(4): 66-68, 73.

彭毅卿．汽蒸预处理对杨木性质及真空干燥速率的影响[D].北京: 北京林业大学, 2013．

姬宁, 杨守禄, 黄安香, 等. 杉木木材干燥技术研究概述[J].贵州林业科技, 2018, 46(4): 51-57.

JI N, YANG S L, HUANG A X, et al. Overviewon research of the drying technology of Chinese fir[J].Guizhou Forestry Science and Technology, 2018, 46(4): 51-57.

周永东, 李晓玲. 人工林杉木高温干燥与常规干燥的比较研究[J].北京林业大学学报, 2005, 27(S1): 18-21.

ZHOU Y D, LI X L. Comparison of high-temperature drying and conventional drying of Chinese fir lumber[J].Journal of Beijing Forestry University, 2005, 27(S1): 18-21.

涂登云, 顾炼百, 杜国兴. 高温水供热干燥速生杉木方材[J].木材工业, 2001, 15(5): 31-32, 34.

TU D Y, GU L B, DU G X. Drying method for Chinese Fir lumber with high temperature hot-water[J].China Wood Industry, 2001, 15(5): 31-32, 34.

涂登云, 刘彬, 顾炼百. 辐射松板材降温干燥工艺的研究[J].华南农业大学学报, 2009, 30(4): 102-104.

TU D Y, LIU B, GU L B. Study on technology of lowering temperature drying of Pinus radiata doard[J].Journal of South China Agricultural University, 2009, 30(4): 102-104.

Vansteenkiste D, Stevens M, Acker J. High temperature drying of fresh sawn poplar wood in an experimental convective dryer[J].Holz Als Roh- Und Werkstoff, 1997, 55(5): 307-314.

李大纲, 顾炼百. 木材高温干燥过程中的弹性应变[J].木材工业, 2000, 14(2): 15-17.

LI D G, GU L B. Elasticity strain of wood in high temperature drying[J].China Wood Industry, 2000, 14(2): 15-17.

鲍甫成, 赵有科, 吕建雄. 杉木和马尾松木材渗透性与微细结构的关系研究[J].北京林业大学学报, 2003, 25(1): 1-5.

BAO G C, ZHAO Y K, LYU J X. Relationship between permeability and fine structure of common Chinese fir and masson pine wood[J].Journal of Beijing Forestry University, 2003, 25(1): 1-5.

文章被引用时，请邮件提醒。

提交