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基于HTAC技术的蓄热式高温空气发生器实验研究
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摘要
高温空气燃烧(High Temperature Air Combustion,简称HTAC)技术是20世纪90年代国际燃烧领域诞生的一项全新型燃烧技术,具有高效节能和低污染排放的双重优越性,对于缓解能源危机、改善环境质量、燃料的有效应用具有重要意义,在欧美、日本等发达国家得到了高度重视和大力推广。
     本文阐述了HTAC技术的产生和发展历程、基本原理及其在国内外的最新发展状况;介绍了基于HTAC技术的生物质高温空气燃气化系统及其关键部件—以HTAC为核心的蓄热式高温空气发生器的工作原理和关键技术。
     本课题由国家高技术研究发展计划专项经费资助,中南大学能源与动力工程学院“生物质高温空气气化技术研究”课题组与株洲工业炉公司合作开发了国内第一台高频切换蓄热式高温空气发生器实验装置。以丙烷气体为燃料,在低(约800℃左右)、中(约1000℃左右)、高(约1150℃左右)三个温度段,选取不同的换向周期,开展了一系列实验研究:分析空气预热温度、排烟温度、炉温、切换周期之间的变化关系;总结蜂窝型陶瓷蓄热体的基本换热规律;计算了蜂窝陶瓷蓄热体的综合传热系数和温度效率,证明其换热系数比之一般同类工质换热器显著提高,其温度效率高达80-88%,而换热装置的
    
    中南大学硕十学位论文
    摘要
    体积大大缩小;研究空气预热温度、切换周期对烟气中NO、排放的影
    响;综合考虑各种因素的影响,确定系统的切换时间在40一605之间较
    为合理;测定了系统的热平衡和热效率,测算表明当预热高温空气达
    到IO000C左右时,系统的热效率可达85.4%;评价了实验装置的运行
    效果,同时指出了存在的不足之处,提出了改进意见,为今后的研究
    [作打下一了基础。
    最后列举了作者认为应进一步开展的研究工作。
High Temperature Air Combustion (HTAC)is a newly developed technology in the field of fuel combustion since 1990's with unique advantages of significant energy saving and low pollution emission. Results from experimental investigation and industrial application show that this new combustion technology will open a new period for engineers and scientists to relieve energy crisis, to control pollutant emission generated from combustion and to improve effective usage of various fuels. The great attention has been paid on it in many developed countries such as Japa^ the United States and the Europe.
    The generation and fundamental principal of HTAC technology are illustrated as well as its development circumstances. The gasification system from biomass using high temperature air based on HTAC technology is introduced; and the working principal and key technologies of one of its core components -Regenerative High Temperature Air Generator are described.
    Co-operating with Zhuzhou Industrial Furnace Manufacturing Company, college of energy and power engineering of Central South University developed the first set of High-cycle Regenerative High Temperature Air Generator inside our country. A series of combustion experiments are carried out with propane as fuel under the conditions of different furnace temperature and switching period. The curves between temperature of heated air , exhaust gas , combustion area and switching period are obtained; The heat exchange rules of the honeycomb regenerator are analyzed and summarized; Both of the synthetic heat exchange coefficient and temperature efficient of the regenerator are calculated; The influences of the temperature of heated air and switching time are researched on nitrogen oxide emission; The optimum switching time of the generator is choosed in terms of all sorts of influential factors; The thermal balance of the system is measured and the calculation results indicate the thermal efficient achieves 85.4% whe
    n the temperature of generated air comes to about 1000 C. The running effects of the system are evaluated; the existing shorts are pointed out and the corresponding suggestions are offered.
    In the end, a series of proposals on further research work are put forward.
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