回收蒸煮處理纖維之性質與再利用

曾君傑

doi:10.6342/NTU201803454

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回收蒸煮處理纖維之性質與再利用

The Properties and Re-Utilization of Recycled Autoclaving Fiber

曾君傑 , Masters　　Advisor：林法勤　　

繁體中文 DOI： 10.6342/NTU201803454

垃圾蒸煮；焙燒；造粒；纖維板；活化能；基辛格法；大澤法； autoclaving ； torrefaction ； pelletization ； fiberboard ； activation energy ； Kissinger method ； Ozawa method

Abstract │ Reference (39) │ Altmetrics

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Nearly 40 % of organic fibers in urban waste in Taiwan, contains unrecoverable paper waste and garden waste. In this study, urban waste and waste straw were used as materials. Organic fibers were taken out by autoclaving, then made to fiberboards. On the other hand, the energy density was increased by torrefaction. Waste straw also enhances its energy density through autoclaving, and mixes the fermented straw with the organic fibers taken out from urban waste to make fiberboards. In addition, this study also uses the Kissinger method, Ozawa method and the Arrhenius equation to investigate the difference in activation energy after autoclaving of waste straw to understand the thermal stability of the product.
The torrefection is taken at temperatures of 250 to 290 °C, and maintaine the temperature for 60 to 90 minutes. The biomass can be regarded as raw coal after torrefection, and subsequent experiment with ultimate analysis, high heating value and thermogravimetric analysis. The pellets were manufactured by ring die pellet mill, and the fiberboards is made according to CNS11212 which is the method of preparation of handsheets for physical testing. The fiberboards were mixed with different proportions of urban waste and fermented straw, and the physical strength of them were detected.
The results showed that the cellulose content in the waste fiber is nearly 70 %, and the lignin content was below then 10 %. Such composition affected the pelletization, resulting in the pellet durability index did not meet the general needs. According to the results of elemental analysis, the carbon content increased while the hydrogen and oxygen content decreased after torrefection, and the properties of biomass were approached to coal, especially at 270 °C that remains 60 to 75 minutes, and the energy density was improved as well. Also it was the best condition for cost-saving. The activation energy was calculated by three methods, Kissinger method, Ozawa method and Arrhenius equation. The results of first two were almost the same, but the results of Arrhenius equation were significantly different. The mechanical properties like bending strength, screw holding capacity and tensile strength decreased as the amount of straw fibers increase, only internal bond strength shows the opposite way.

Reference ( 39 ) 〈TOP〉

王松永 (1993) 木材物理學。國立編譯館。816頁。
王彥棋 (2011) 應用蒸煮程序處理都市廢棄物及其生質物回收再利用之研究。國立臺灣大學環境工程學研究所，碩士論文。134頁。
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林怡秀 (2011) 以蒸煮程序處理生質廢棄物對其減積及再利用之影響。國立臺灣大學環境工程學研究所，碩士論文。168頁。
林裕仁 (2009) 生質能源利用新寵兒-木質顆粒。林業研究專訊 16(6)：17-19頁。

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