秸秆沼气发酵工程反应罐内传热分析

发布时间：2018-08-22 13:00

【摘要】：文章针对国内外广泛关注的秸秆沼气工程,基于热力学原理,结合实验和理论,对秸秆发酵系统中罐内温度分布进行了分析。结果表明,由于秸秆的加入,会导致体系内部温度不均匀性加重,8 wt%秸秆体系的总传热系数相比于纯水体系降低了17%,其原因主要在与秸秆自身特性与换热温差;另外冷物料的直接进料会加剧罐内温度波动,进口物料的预热处理和搅拌是解决秸秆发酵过程传热速率与效率低的主要方法。
[Abstract]:In this paper, the temperature distribution in straw fermentation system is analyzed based on thermodynamics principle, experiment and theory, aiming at straw biogas engineering which is widely concerned at home and abroad. The results showed that the total heat transfer coefficient of 8 wt% straw system decreased by 17% compared with pure water system due to the addition of straw, which was mainly due to the characteristics of straw and the difference of heat transfer temperature. In addition, the direct feeding of cold materials will aggravate the temperature fluctuation in the tank. Preheating and stirring of imported materials are the main methods to solve the low heat transfer rate and efficiency of straw fermentation process.
【作者单位】：南京工业大学材料化学工程国家重点实验室;南京工业大学生物与制药工程学院;南京工业大学生物能源研究所;
【基金】：国家重点基础研究发展计划(2013CB733500-3/4) 江苏高校优势学科建设工程
【分类号】：S216.4;X712

【相似文献】