Pre-processing Technology by Fine-crusher and Sub-critical Water for Cellulose Waste Ethanolization

本项目是从亚临界水处理细碎木材、新设计的细碎机的研制和细碎木材的定量评价三个方面开发森林木材废弃物的前处理技术，证实了亚临界水处理具有释放木质素的作用，木质素的分离率随处理温度和处理时间的增加而增加。然而，木质纤维素在释放木质素的条件下被水解成葡萄糖和羟甲基纤维素钠。在亚临界水处理过程中，木质素的释放不可避免地要发生纤维素的水解。考虑到这一问题，它表明纤维素链变得松散。对新设计的细碎机的粉碎性能进行了测试。三种不同扭矩…的布置对取料沿筛轴方向的分布有影响更多的刀子。通过改变布局来研究布局，并定义了产生平面分布的布局。回收的碎木的粒度分布接近预期。各转速下的加权平均直径在椭圆极筛上差异不大，在圆孔筛上随着转速的降低而减小。并与加权平均直径进行比较。这两个指标是相互独立的。分维可以用来描述形状的复杂程度。通过对同一筛子上具有不同花纹的两幅碎木图像的计算，证明了这一解释的正确性。在行驶条件下，这两个指标的作用不同。在细碎木材形状的复杂性和随机性对亚临界水的反应有直接影响方面，分维比加权平均直径更有用。细碎木材的分维受驱动条件和筛型的影响较大。利用这种方法，可以优化细碎木材的形状特性，以满足后续亚临界水处理工艺的要求。较少

This project is to develop pre-processing technology of forest and timber waste, which is derived from the fine-crushed wood treatment by sub-critical water, the development of newly designed fine-crusher and the quantitative evaluation of fine-crushed wood.It was confirmed that the treatment by sub-critical water has effect of the liberation of lignin and the resolution of lignin increases as the temperature and the time of the treatment increase. However, woody cellulose is hydrolyzed to glucose and HMF under the condition of liberation of lignin. Hydrolysis of cellulose is unavoidable for the lignin liberation by sub-critical water treatment. Upon considering the matter, it shows that the chain of cellulose becomes loose. It suggests any effect of accretionary wettableness of cellulose.Crushing performance of newly designed fine-crusher was tested. The distribution of withdrew material along the axial direction of sieve is influenced by the layout of three kinds of twisted is fail k … More nives. The distribution was investigated by changing the layout, and the layout producing flat distribution was defined. Particle size distributions of withdrawn crushed wood came near to expectations. The weighted average diameter for each rotational speed was not significantly different at the sieve of ellipse polar and decreased as the rotational speed decreased at the sieve of circular hole.The quantitative values for the random and complex contours of fine-crushed wood have been calculated from fractal dimension. These values were compared with the data of weighted average diameter. These two indexes were independent each other. Fractal dimension could describe the complexity of the shape. Appropriateness of this explanation was proved in the calculation about the two images of the crushed wood, which had the different patterns on the same sieve. On the driving condition, the two indexes acted differently. In the respect that the complexity and the randomness of the shape of the fine crushed wood have direct effect upon the reaction of sub-critical water, fractal dimension is more useful than weighted average diameter. The fractal dimension of the fine-crushed wood was greatly influenced by the driving condition and the sieve type. By using this method, it is possible to optimise the shape character of fine-crushed wood for the request from the following process by sub critical-water. Less