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首页> 外文期刊>Thermal engineering >A Review of the Research Results into the Technologies of Solid-Fuel Combustion in a Circulating Fluidized Bed Conducted Abroad and in Russia
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A Review of the Research Results into the Technologies of Solid-Fuel Combustion in a Circulating Fluidized Bed Conducted Abroad and in Russia

机译：在国外和俄罗斯进行循环流化床中的固体燃料燃烧技术研究结果述评

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The article provides an analysis of the current status and the development of the circulating fluidized bed (CFB) combustion technology. The main distinguishing features of the CFB combustion technology and the stages of its development worldwide are provided. The advantages and disadvantages of the CFB technology compared with traditional flame combustion are outlined. Examples of the largest power-generating units equipped with CFB boilers are provided. The latest studies of the specific features of the CFB boiler designs have been analyzed to increase the steam parameters and assure the highest efficiency of the power units equipped with material CFB boilers. The basic trends in the research into the hydrodynamics, separation, composition of the bed, etc. are considered. It is shown that the capturing efficiency of solid particles is the decisive factor in increasing their consumption and retention of fine calcinated particles in the circulating material. The high concentration in the disengaging space of the combustor results in an increase in the heat-transfer coefficient and ensures a uniform temperature distribution in the combustor, the required degree of reaction of limestone particles with SO_(2)for the most efficient binding of sulfur, and more complete combustion of the fuel (the highest possible residence time of the fuel particles in the combustor). Studies of Chinese researchers, their practical developments, and the introduction of energy-saving technology with a low volume of particles in the bed are analyzed. The results of the latest studies on the minimization of emissions of both conventional hazardous substances, such as nitrogen and sulfur oxides and other pollutants, including greenhouse gases, are provided. The problems that arise during the combustion of several kinds of fuel, including biomass, are investigated. Results of studying the processes of bed agglomeration, fouling of the heat-transfer surfaces, and corrosion of CFB boiler superheaters are presented.
机译：本文提供了对循环流化床（CFB）燃烧技术的当前状态和开发的分析。提供了CFB燃烧技术的主要区别特征及其发展的阶段。概述了CFB技术的优点和缺点与传统的火焰燃烧相比。提供了配备有CFB锅炉的最大发电单元的示例。已经分析了对CFB锅炉设计的特定特征的最新研究，以增加蒸汽参数，并确保配备有材料CFB锅炉的动力装置的最高效率。考虑了研究流体动力学，分离，床的组成等研究的基本趋势。结果表明，固体颗粒的捕获效率是增加它们在循环材料中消耗和保留细钙颗粒的决定性因素。燃烧器的脱离空间中的高浓度导致热转印系数的增加，并确保燃烧器中的均匀温度分布，石灰石颗粒具有所需的硫磺颗粒的所需反应，以获得硫的最有效的结合并且更完全燃烧燃料（燃烧器中的燃料颗粒的最高停留时间）。分析了中国研究人员的研究，其实践发展和床上颗粒体积低颗粒的节能技术。提供了最新研究关于常规有害物质排放的最小化，例如氮和硫氧化物等污染物，包括温室气体。研究了在包括生物质的几种燃料燃烧过程中出现的问题。研究了研究床块，传热表面污染的过程，CFB锅炉过热器的腐蚀的结果。

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