韩平,蒋恩臣,李世博,王明峰,孙焱,吴宇健.热解挥发物分级冷凝初分生物油研究[J].农业机械学报,2016,47(11):207-212.
Han Ping,Jiang Enchen,Li Shibo,Wang Mingfeng,Sun Yan,Wu Yujian.First-fractional Bio-oil by Fractional Condensation of Pyrolysis Volatiles[J].Transactions of the Chinese Society for Agricultural Machinery,2016,47(11):207-212.
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热解挥发物分级冷凝初分生物油研究   [下载全文]
First-fractional Bio-oil by Fractional Condensation of Pyrolysis Volatiles   [Download Pdf][in English]
投稿时间:2016-01-01  
DOI:10.6041/j.issn.1000-1298.2016.11.028
中文关键词:  油茶果壳  初分生物油  热解  分级冷凝
基金项目:农业科技成果转化项目(2014GB2E000048)和广东省应用型科技研发专项(20150237)
作者单位
韩平 东北农业大学
佳木斯大学 
蒋恩臣 东北农业大学
华南农业大学 
李世博 华南农业大学 
王明峰 华南农业大学 
孙焱 华南农业大学 
吴宇健 华南农业大学 
中文摘要:设计了一种恒温分级冷凝装置,应用该装置对油茶果壳在500℃时的热解挥发物进行了分级冷凝试验,获得了165℃以上、165~120℃、120℃以下3个冷凝温度段下的分级生物油产物;分析了各组产物的热值、pH值、运动粘度后发现:前2级生物油产物的含水率得到了有效降低,高位热值均大于23MJ/kg,比常规方法所获生物油的热值增加约44%,但运动粘度较大;随着冷凝温度的降低,各组生物油运动粘度显著下降,pH值略有提升;通过热分析曲线并结合综合燃烧特性指数分析了生物油的燃烧特性,发现利用分级冷凝所获得的初分生物油在燃烧特性上出现了比较明显的区别,其中第2级生物油在各组样品中的燃烧性能最好。试验结果表明,所设计的分级冷凝装置基本实现了热解挥发物的在线初级分离,各级产物的特性有比较明显的区别,为生物油分级冷凝装置的设计提供了参考,为分级生物油的进一步应用奠定了基础。
Han Ping  Jiang Enchen  Li Shibo  Wang Mingfeng  Sun Yan  Wu Yujian
Northeast Agricultural University;Jiamusi University,Northeast Agricultural University;South China Agricultural University,South China Agricultural University,South China Agricultural University,South China Agricultural University and South China Agricultural University
Key Words:Camellia oleifera shell  first fractional bio oil  pyrolysis  fractional condensation
Abstract:Pyrolysis is an important way of biomass resources utilization. As a liquid product of biomass pyrolysis, bio oil has good application prospects in future energy market. However, the problems of low calorific value, high viscosity, high moisture content, high corrosiveness, and poor stability problem exist until now, which constrain further application of bio oil. At present, many scholars at home and abroad focus on staged utilization of bio oil, by different separation methods to yield the bio oils with diverse physical and chemical properties, and then by further purification to obtain the high quality of bio oil. Fractional condensation can realize real time primary separation of bio oil, which can facilitate further refinement, so the field has become research focus. In order to achieve the fractional condensation of bio oil,various condensation modes were studied in worldwide. Spray condensation were widely used to achieve the aim of rapid condensation because it can quickly reduce the temperature of pyrolysis gas. The tube condensation mainly depending on indirect heat transfer was used in large scale chemical production and its technology was mature, so tube condensation was applied to the research of fractional condensation. Based on the previous researches on fractional condensation unit, a fractional condensation unit using constant temperature condensation was designed, of which condensation levels and heat exchange area can be adjusted flexibly. By the independent design of multi level condensing unit and adopting camellia seed shells as pyrolysis materials, fractional condensation tests on the pyrolysis volatiles of camellia seed shells at 500℃ were carried out, and three fractional bio oil products under the condensation temperature levels of more than 165℃ and 165~120℃, below 120℃ were received. The physical and chemical characteristics of the products were analyzed, and the analysis results of the first two level fractional products at more than 165℃, 165~120℃ showed that moisture content effectively reduced and gross calorific value was more than 23MJ/kg on average, 44% more than the calorific value obtained by conventional condensation, but kinematic viscosity was not improved. With condensation temperature dropped, kinematic viscosity had significant reduction in each group of bio oil and pH value was slightly rose. Combining the thermal analysis curves with comprehensive combustion characteristic index to analyze combustion characteristics of bio oil, the results showed that bio oils of primary separation obtained by fractional condensation had obvious differences, and YY2 demonstrated the best combustion performance. In conclusion, real time primary separation of pyrolysis volatiles generally was achieved by dependently designed fractional condensation and the characteristics of each stage’s product were varied. The device designed can provide a reference for design of fractional condensation of pyrolysis volatiles and lay a theoretical foundation for the further application of fractional bio oil.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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