50 mm厚进口辐射松锯材高效干燥工艺
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摘要
在对企业50mm厚进口辐射松锯材干燥生产调研的基础上,检测和分析干燥速率、干燥周期和锯材干燥质量的相互关系,制定常规干燥优化工艺和高温干燥工艺。结果显示:以满足国家标准干燥锯材质量二级材的要求为前提,常规工艺干燥周期可由10.75d优化至6.20d,高温干燥周期仅需3.69d,干燥效率大幅提高。推荐使用优化的高效干燥工艺,有条件的企业可采用高温干燥工艺,进一步提高干燥效率。
Based on technical investigation and analysis of drying practices in a few lumber drying companies, an optimized conventional drying schedule and a high temperature drying schedule were developed for 50 mm thick imported radiata pine lumber to improve drying quality and efficiency.The results showed that drying time was significantly shortened by using the optimized conventional schedules, and quality of the kiln dried lumber met the 2~(nd) grade requirements of China national standard GB/T 6491. The drying time was shortened from 10.75 days with conventional drying schedules to 6.20 days with the optimized conventional drying schedule, and was further decreased to 3.69 days with a high temperature drying schedule, resulting in significantly improved drying efficiency. The high temperature drying schedule was recommended for high temperature drying kilns so as to further improve drying efficiency.
Based on technical investigation and analysis of drying practices in a few lumber drying companies, an optimized conventional drying schedule and a high temperature drying schedule were developed for 50 mm thick imported radiata pine lumber to improve drying quality and efficiency.The results showed that drying time was significantly shortened by using the optimized conventional schedules, and quality of the kiln dried lumber met the 2~(nd) grade requirements of China national standard GB/T 6491. The drying time was shortened from 10.75 days with conventional drying schedules to 6.20 days with the optimized conventional drying schedule, and was further decreased to 3.69 days with a high temperature drying schedule, resulting in significantly improved drying efficiency. The high temperature drying schedule was recommended for high temperature drying kilns so as to further improve drying efficiency.
引文
[1]周永东.进口桃花心木和辐射松木材性质及加工技术研究[J].木材工业,2019, 33(1):1-4.
[2]高鑫,周凡,付宗营,等.进口辐射松原木初加工利用现状与发展建议[J].木材工业,2019, 33(1):5-7, 16.
[3]李瑞芝.新西兰辐射松的干燥和防腐处理[J].山东林业科技,1994(1):45-47.
[4] HAQUE M N, SARGENT R. Standard and superheated steam schedules for radiate pine single-board drying:model prediction and actual measurements[J]. Drying Technology, 2008, 26(2):186-191.
[5] PANG S S. External heat transfer in moist air and superheated steam for softwood drying[J]. Chinese Journal of Chemical Engineering, 2004,6(6):762-766.
[6] PAKOWSKI Z, ADAMSKI R. On prediction of the drying rate in superheated steam drying process[J]. Drying Technology, 2011, 29(13):1492-1498.
[7]涂登云,江宁,李睿,等.辐射松板材加速干燥工艺对材性的影响[J].林产工业,2004, 31(2):35-37.
[8]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.
[9] WATERSON G C. Australian timber seasoning manual(3~(rd)Edition)[M]. Australian Furnishing Research and Development Institute, 1997:167-176.
[10]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(Supp):18-21.
[11]周永东,姜笑梅,刘君良.干燥方法对毛白杨木材力学性质的影响[J].木材工业,2009, 23(3):13-15.
[12]高利祥,周永东,高瑞清,等.柳杉锯材高温干燥初步研究[J].木材工业,2014, 28(5):16-19.
[13]张璧光,高建民,伊松林,等.实用木材干燥技术[M].北京:化学工业出版社,2005:110-111.
[2]高鑫,周凡,付宗营,等.进口辐射松原木初加工利用现状与发展建议[J].木材工业,2019, 33(1):5-7, 16.
[3]李瑞芝.新西兰辐射松的干燥和防腐处理[J].山东林业科技,1994(1):45-47.
[4] HAQUE M N, SARGENT R. Standard and superheated steam schedules for radiate pine single-board drying:model prediction and actual measurements[J]. Drying Technology, 2008, 26(2):186-191.
[5] PANG S S. External heat transfer in moist air and superheated steam for softwood drying[J]. Chinese Journal of Chemical Engineering, 2004,6(6):762-766.
[6] PAKOWSKI Z, ADAMSKI R. On prediction of the drying rate in superheated steam drying process[J]. Drying Technology, 2011, 29(13):1492-1498.
[7]涂登云,江宁,李睿,等.辐射松板材加速干燥工艺对材性的影响[J].林产工业,2004, 31(2):35-37.
[8]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.
[9] WATERSON G C. Australian timber seasoning manual(3~(rd)Edition)[M]. Australian Furnishing Research and Development Institute, 1997:167-176.
[10]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(Supp):18-21.
[11]周永东,姜笑梅,刘君良.干燥方法对毛白杨木材力学性质的影响[J].木材工业,2009, 23(3):13-15.
[12]高利祥,周永东,高瑞清,等.柳杉锯材高温干燥初步研究[J].木材工业,2014, 28(5):16-19.
[13]张璧光,高建民,伊松林,等.实用木材干燥技术[M].北京:化学工业出版社,2005:110-111.