| 摘要:（摘要内容经过系统自动伪原创处理以避免复制，俄语论文范文，下载原文正常，内容请直接查看目录。） 本文以30mm出口俄罗斯落叶松为研究对象，剖析归纳综合了国际今朝枯燥该种木材涌现的成绩，研究了其枯燥特征和枯燥技巧。起首研究了落叶松在分歧温度下枯燥至分歧含水率时的材性变更，剖析了温度、含水率对材性及枯燥质量的作用；检测剖析了惯例枯燥进程中木材外部温度散布及含水率散布的变更纪律，商量了温度和含水率间的关系。进而根据上述研究成果，联合百度实验推定的枯燥基准和以往的落叶松枯燥技巧及临盆理论，停止了一系列包含升温工艺和降温工艺在内的惯例枯燥试验。经由过程对枯燥进程中木材的温度、含水率、应力、枯燥介质的温湿度等参数的剖析，联合枯燥进程中热、质传递纪律，总结出针对俄罗斯产落叶松较为公道的枯燥工艺，而且提出了进步枯燥质量和临盆效力的有用办法，为落叶松锯材枯燥工艺的制订供给实际根据和技巧包管。别的还摸索了微波、汽蒸预处置对落叶松材性及枯燥特征等作用，为开辟枯燥新技巧、新工艺积聚了技巧材料。实验成果注解落叶松在中高温区域枯燥时木材的某些力学性质呈下降趋向，而在低温区域其力学性质显著减弱；温度梯度可以增进木材外部水份的传递，但应经由过程采用恰当的工艺构成并保持较长时光的温度梯度来加速枯燥速度；恰当的含水率梯度也能加速枯燥速度；惯例枯燥试验中百度实验推定的枯燥基准较为合适30mm厚俄罗斯落产叶松锯材的枯燥，枯燥进程早期不宜采取较强的枯燥介质前提，俄语论文网站，中期处置的机会须要提早；降温枯燥工艺对俄罗斯产落叶松的枯燥临盆是可行的，但要选择适合的降温机会。微波预处置可以显著进步落叶松惯例枯燥速度，但招致木材超微结构产生变更和某些力学性质稍微下降；汽蒸处置改良了落叶松的传热传质机能，加速了枯燥速度，而对其抗弯强度和弹性模量则作用不明显。 Abstract: The 30mm exported to Russia larch as the research object, analyzes and concludes the results appeared in the current international, dry the wood, discussion of the the boring features and boring skills. First discussed the larch at different temperatures dry to different moisture content of material change, analysis of the temperature and moisture content on the influence of material and boring quality; test analysis of the boring practice process in wood external temperature distribution and water dispersal rates of change discipline, to discuss the relationship between temperature and moisture content. And according to the research results, combined with experimental Baidu presumption boring benchmark and previous Larch boring techniques and production, the theory, stop the series includes heating process and cooling process, practice boring test. Via the process of wood in the boring process of temperature, water content rate, analysis on the force, boring medium parameters such as temperature and humidity, combined boring process in heat and mass transfer discipline, summed up for the Russian Larch reasonable boring process, and put forward the progress dry matter weight and birth effect of effective measures, for the formulation boring technology of Larch sawn timber supply theoretical basis and techniques guarantee. Else tries to find the microwave steam, steam pretreatment of larch wood and boring characteristics influence, open up new boring techniques, new technology accumulation and technological materials. The experimental results in the high temperature region of Larch notes boring some mechanical properties of wood showed a downward trend, but decreased in the low temperature region and its mechanical properties; temperature gradient can enhance transfer outside wood moisture, but should through the use of appropriate technology and maintain a longer period of time the temperature gradient to accelerate the drying speed; proper moisture gradient the rate can also accelerate the drying speed; experimental test in the presumption of Baidu practice boring boring base is suitable 30mm thick Russian timber production fell Ye Song boring, boring boring process early should take strong medium premise, medium-term opportunities to advance disposal; cooling dry process is feasible to give birth to Russia larch wood boring, but to choose suitable for the cooling of the opportunity. Microwave pretreatment can be significant progress has been made in the practice of Larix drying speed, but incur wood ultrastructure produced change and certain mechanical properties decrease slightly; steam treatment improved the function of heat and mass transfer of the larch, accelerate the drying speed, and on its bending strength and elastic modulus influence is not obvious. 目录: |
