| 基于热重法的生物质工业分析及其发热量测定 |
| |
| 引用本文： | 王 茹,田宜水,赵立欣,姚宗路,孟海波,侯书林.基于热重法的生物质工业分析及其发热量测定[J].农业工程学报,2014,30(5):169-177. |
| |
| 作者姓名： | 王 茹 田宜水 赵立欣 姚宗路 孟海波 侯书林 |
| |
| 作者单位： | 1. 农业部规划设计研究院，农业部农业废弃物能源化利用重点实验室，北京 100125; 2. 中国农业大学工学院，北京 100083;;1. 农业部规划设计研究院，农业部农业废弃物能源化利用重点实验室，北京 100125;;1. 农业部规划设计研究院，农业部农业废弃物能源化利用重点实验室，北京 100125;;1. 农业部规划设计研究院，农业部农业废弃物能源化利用重点实验室，北京 100125;;1. 农业部规划设计研究院，农业部农业废弃物能源化利用重点实验室，北京 100125;;2. 中国农业大学工学院，北京 100083; |
| |
| 基金项目： | 十二五国家科技计划课题（2012BAD30B0202） |
| |
| 摘 要： | 为了比较不同种类生物质的燃烧特性,丰富热重分析技术的应用方向,该文采用热重分析技术对农业剩余物、林业剩余物和工业加工废渣的代表性生物质进行了空气气氛下不同升温速率的燃烧特性试验研究。研究表明:3种类型生物质的燃烧过程均包括4个主要阶段:水分蒸发阶段、挥发分析出及燃烧阶段、固定碳燃烧阶段、燃尽阶段。该文提出1种确定样品工业分析值的方法,即热分析曲线法,并推荐应用20℃/min升温速率下的热分析曲线图来计算确定。同时还提出1种差热分析法,用以计算生物质样品发热量,分析发现,农业秸秆类剩余物适用于20℃/min的升温速率,木屑和甜高粱渣适用于5、10℃/min的升温速率。该文提出的计算工业分析值的热分析曲线法与计算发热量的差热分析法,为热重分析技术研究生物质的燃烧特性提供了新的应用方向,但2种新方法的建立,以及他们的有效性和适用性,仍需要大量试验数据的验证和进一步的试验研究。
|
| 关 键 词： | 燃烧 生物质 热重分析 差热分析 工业分析 发热量 |
| 收稿时间： | 2013/8/29 0:00:00 |
| 修稿时间： | 2014/1/24 0:00:00 |
Industrial analysis and determination of calorific value for biomass based on thermogravimetry |
| |
| Wang Ru,Tian Yishui,Zhao Lixin,Yao Zonglu,Meng Haibo and Hou shulin.Industrial analysis and determination of calorific value for biomass based on thermogravimetry[J].Transactions of the Chinese Society of Agricultural Engineering,2014,30(5):169-177. |
| |
| Authors: | Wang Ru Tian Yishui Zhao Lixin Yao Zonglu Meng Haibo and Hou shulin |
| |
| Institution: | 1. Key Laboratory of Energy Resource Utilization from Agricultural Residues, Ministry of Agriculture, Chinese Academy of Agricultural Engineering, Beijing 100125 China;;1. Key Laboratory of Energy Resource Utilization from Agricultural Residues, Ministry of Agriculture, Chinese Academy of Agricultural Engineering, Beijing 100125 China;;1. Key Laboratory of Energy Resource Utilization from Agricultural Residues, Ministry of Agriculture, Chinese Academy of Agricultural Engineering, Beijing 100125 China;;1. Key Laboratory of Energy Resource Utilization from Agricultural Residues, Ministry of Agriculture, Chinese Academy of Agricultural Engineering, Beijing 100125 China;;1. Key Laboratory of Energy Resource Utilization from Agricultural Residues, Ministry of Agriculture, Chinese Academy of Agricultural Engineering, Beijing 100125 China;;2. College of Engineering, China Agricultural University, Beijing 100083, China; |
| |
| Abstract: | Abstract: The global energy crisis arouses growing interest in the field of renewable energy all over the world. Biomass is a world-recognized environmentally friendly renewable energy because of its lower contents of N and S element and the approximate zero net emissions of CO2. How to make full use of biomass energy has been an important direction of studies in the field of renewable energy. Biomass combustion is one of the most important technologies for large-scale efficient and clean utilization of biomass energy. The existing study on biomass combustion characteristics in China mostly focus on a kind of biomass, and little on different kinds of biomass. Thermal analysis curves (TGA- DTG- DTA) are commonly used in combustion characteristic analysis and dynamic analysis, but not in biomass combustion analysis. Therefore, this study investigated the combustion characteristics of biomass--agricultural residues (wheat straw, cotton straw, and cornstalk), forestry residues (sawdust), and industrial waste residues (sweet sorghum slag) at different heating rates (5, 10, 20, and 30oC /min) in air by thermo gravimetric analysis technology. Results showed that all the biomass combustion included four main phases: water evaporation stage, devolatilization and combustion stage, fixed carbon combustion stage, and burnout stage. The comprehensive combustion characteristic index S was ordered in wheat straw (XMJ)> cotton stalk (MHJ)> sweet sorghum slag (GLZ)> cornstalk(YMJ)> sawdust (MX). The rise of heating rate could improve the combustion performance of biomass samples. Based on these results, a TGA-DTG-DTA method was proposed to determine the values of industrial analysis of samples. The weightlessness rate of A-B, B-C, and C-D was equal to moisture content, volatile content, fixed carbon content, respectively. The weightlessness rate of point D was the ash content of the sample. Thermal analysis curves under 20oC /min heating rate were recommended for industrial analysis. Meanwhile, a differential thermal analysis method was also proposed to determine calorific value of samples, which was the heat difference of peak area between RS (the heat discharged) and OP (the heat absorbed). The other heat-related curves could be obtained from TA-60WS data processing software built in the instrument. Overall, the best combustion performance could be obtained at the heating rate of 20oC/min for agricultural residues, 5oC /min for sawdust and 10oC /min for sorghum slag. The differential thermal analysis and thermal analysis curve expanded the application of thermogravimetric analysis technology in studies on biomass combustion characteristic. However, their effectiveness and applicability required further verification of more experiments and data. It hoped that this study would provide valuable information for maturing biomass combustion technology in China. |
| |
| Keywords: | combustion biomass thermogravimetric analysis differential thermal analysis industrial analysis calorific value |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《农业工程学报》浏览原始摘要信息 |
| 点击此处可从《农业工程学报》下载免费的PDF全文 |
|
