生物质燃料储存时自加热过程的研究

论文总字数：27332字

摘 要

本课题旨在通过研究生物质燃料存储时由于内部生物化学氧化反应导致自加热及其对生物质燃料本身燃料特性的影响，对预防生物质燃料存储时发生火灾和布置消防设施及提高生物质燃料储存的经济性有重要意义。论文以稻草和锯末作为原材料研究生物质燃料储存时的自加热过程及其特性行。将特定尺寸、不同含水率的原材料放入设置有热电偶的敞口容器中进行实验，通过监测其内部温度的变化，研究它们的自加热过程和特性。实验结果显示在一定条件下对生物质燃料样品进行储存，稻草样品会发生显著地自加热现象，随着反应的发生，样品内部温度逐渐上升直至峰值后缓慢降低至室温。水分含量的增加对稻草的自加热有促进作用，水分含量越高稻草自加热现象越明显。明显的自加热改变燃料的工业分析组成，导致一定程度的干物质损失而在同样的反应条件下，锯末的自加热反应却非常微弱，很难看到明显的温度上升现象，这说明生物质自身的种类特性对其自加热反应也有明显影响。

关键词：生物质燃料；储存；自加热；含水率

ABSTRACT

It is significant to study the characteristics of self-heating and its effect on the fuel properties of solid biomass fuels due to the internal biological reactions during fuel storage. It is very important to prevent biomass materials from the spontaneous combustion and deploy the fire-fighting facilities and improve the economical efficiency of full storage systems. The present work investigates the self-heating process and its characteristics during the storage of biomass fuels by using rice straw and sawdust as raw materials. Raw materials with a specific size and moisture content were placed in open containers equipped with thermocouples. Their self-heating processes and characteristics were studied by monitoring the changes in their internal temperatures. The experimental results show that, stored under certain conditions, the temperatures within the straw samples gradually increased from the initial temperature to the peaks and then slowly decreased to temperature near the ambience. Increasing the initial moisture content promotes the self-heating of the straw. The straw with a higher moisture content was observed to present more apparent self-heating. Strong self-heating changes the proximate composition of the fuel and leads to considerable dry matter loss. Under the same conditions, Under the same conditions, the self-heating of the sawdust is very weak. It is difficult to see the apparent temperature rises. This shows that the type of biomass fuel also has a significant effect on the self-heating.

KEY WORDS: biomass fuels; storage; self-heating; moisture content

目 录

摘要 Ⅰ

ABSTRACT Ⅱ

第一章 绪论 1

1.1背景 1

1.1.1基本概念 1

1.1.2生物质燃料自加热的影响因素 2

1.2研究方法 4

1.2.1热重分析法（TGA法） 4

1.2.2差示扫描量热法（ DSC法）^{【10，12】} 4

1.2.3交叉点法 5

1.2.4特征温度法 5

1.2.5氧吸附法 5

1.2.6方法总结 6

1.3课题的提出和论文的主要研究内容 6

1.3.1 课题的提出 6

1.3.2 研究内容 7

1.4 本章小结 7

第二章 基于绝热杜瓦瓶的生物质燃料自加热实验方法 9

2.1 引言 9

2.2 实验过程 9

2.2.1 实验装置 9

2.2.2 生物质原样预处理及实验样品制备 11

2.3实验方法和内容 12

2.4实验步骤 13

2.5本章小结 13

第三章 生物质燃料自加热过程特性 14

3.1 稻草自加热过程实验结果 14

3.2 水分含量对自加热过程及其特性影响的分析 21

3.3 锯末自加热过程实验结果 23

3.4 稻草与锯末自加热过程特性的比较 26

3.5 本章小结 27

第四章 全文总结及展望 29

4.1 全文总结 29

4.1.1 自加热实验 29

4.2自加热实验的改进与展望 30

4.2.1 分析热值 30

4.2.2 分析气体 31

4.2.3 分析菌种 31

4.2.4 分析初始温升 32

致谢 33

参考文献 34

第一章 绪论

1.1背景

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