28 resultados para RDF Reification

em Chinese Academy of Sciences Institutional Repositories Grid Portal


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垃圾衍生燃料 (Refuse-Derived Fuels-RDF)具有热值高、易燃烧的优点。RDF的一个潜在应用是与煤进行混烧,替代一部分锅炉燃烧用煤。由于RDF挥发份相当高,因此燃烧时的污染物排放不易控制。本文在非均匀布风流化床中进行了RDF与煤的混烧试验,测量了H_2O、CO、CO_2、NO、N_2O、HCl、SO_2等污染物质的排放特性。结果表明与单纯燃烧RDF相比,混烧时的CO生成量大大下降;SO2生成浓度较低,而HCl的生成量比单纯烧煤时明显增加。

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An internally circulating fluidized bed (ICFB) was applied to investigate the behavior of chlorine and sulfur during cofiring RDF and coal. The pollutant emissions in the flue gas were measured by Fourier transform infrared (FTIR) spectrometry (Gasmet DX-3000). In the tests, the concentrations of the species CO, CO2, HCl, and SO2 were measured online. Results indicated when cofiring RDF and char, due to the higher content of chlorine in RDF, the formation of HCl significantly increases. The concentration of SO2 is relatively low because alkaline metal in the fuel ash can absorb SO2. The concentration of CO emission during firing pure RDF is relatively higher and fluctuates sharply. With the CaO addition, the sulfur absorption by calcium quickly increases, and the desulfuration ratio is bigger than the dechlorination ratio. The chemical equilibrium method is applied to predict the behavior of chlorine. Results show that gaseous HCl emission increases with increasing RDF fraction, and gaseous KCl and NaCl formation might occur.

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An internally circulating fluidized bed (ICFB) was applied to investigate the behavior of chlorine and sulfur during cofiring RDF and coal. The pollutant emissions in the flue gas were measured by Fourier transform infrared (FTIR) spectrometry (Gasmet DX-3000). In the tests, the concentrations of the species CO, CO2, HCl, and SO2 were measured online. Results indicated when cofiring RDF and char, due to the higher content of chlorine in RDF, the formation of HCl significantly increases. The concentration Of SO2 is relatively low because alkaline metal in the fuel ash can absorb SO2. The concentration of CO emission during firing pure RDF is relatively higher and fluctuates sharply. With the CaO addition, the sulfur absorption by calcium quickly increases, and the desulfuration ratio is bigger than the dechlorination ratio. The chemical equilibrium method is applied to predict the behavior of chlorine. Results show that gaseous HCl emission increases with increasing RDF fraction, and gaseous KCl and NaCl formation might occur.

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随着越来越多的信息被表示为RDF格式,如何高效地对RDF信息进行分发和过滤成为一个重要的问题.在语义Web环境下的信息分发系统中,输入的RDF信息需要和大量的用户订阅条件进行匹配,而用户的订阅条件可以被表示为RDF图模式.根据RDF图的特点,并对其增加了一些约束.设计了一种新的RDF图模式匹配算法.实验结果表明,该算法的匹配效率远远高于传统的图模式匹配算法.

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综述垃圾衍生燃料( Refuse Derived Fuel, R D F)的性能、研究开发概况,介绍了日本几个有代表性的垃圾衍生燃料生产利用设备

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生活垃圾的能源化作为环保与能源交叉领域的新兴科学技术,已逐渐引起世界各国的重视,而焚烧是垃圾能源利用的最重要的手段之一。但由于垃圾直接焚烧存在二次污染、炉内腐蚀等问题,大大影响了垃圾能利用的成本。在此背景下,垃圾衍生燃料(RDF)作为垃圾能利用领域的新的生长点应运而生,并朝着大规模工业应用的方向发展。笔者就这一有发展潜力的能源替代物的技术特点、现状及研究进展作简略介绍。