An extensive experimental campaign aimed to study the influence of temperature on the fluidization behavior of solid materials in the presence of interparticle forces (IPFs) were conducted in a 20 cm I.D.pilot scale fluidized bed reactor.Coarse silica sand particles (dp=830 μm, pp=2650 kg/m3) were used as the bed material.Varying degree of IPFs was introduced into the otherwise fresh bed material by combustion of bituminous coal or alkali and/or alkali earth metals laden coal.In the temperature range targeted by the study (700-1000°C), impurities in the coal and alkali and/or alkali earth metals can form low melting point eutectics on the silica sand surface yielding particle cohesiveness (IPFs).Propane was then used to maintain the bed temperature and the bed hydrodynamic characteristics were monitored using high frequency (400 Hz) pressure signals.Analysis of acquired pressure signals showed that the presence of 1PFs at high temperature could drastically change the flow dynamics of gas-solid fluidized bed.It confirms that the sole consideration of variations of gas phase properties in prediction of bed hydrodynamics at high temperatures for the purpose of design and operation could introduce considerable errors.
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机译：一种广泛的实验活动，旨在研究温度对颗粒力（IPF）存在于固体物质（IPF）的流化行为的影响，在20cm Idpilot规模流化床反应器中进行。硅胶砂颗粒（DP =830μm， PP = 2650 kg / m3）用作床材料。通过沥青煤或碱和/或碱土金属升起的煤炭燃烧，将IPF的程度引入其他新床材料中。在研究中瞄准的温度范围内（700-1000℃），在煤和碱金属和/或碱土金属的杂质可形成在二氧化硅砂表面得到粒子内聚性低熔点共晶（IPF问题）.Propane然后用来保持床层温度和床使用高频（400Hz）压力信号监测流体动力学特性。获取的压力信号分析显示，在高温下存在1PF可能会大大改变G的流动动态尽可能固体流化床。在为设计和操作目的的高温下，唯一考虑在高温下预测床流体动力学预测的变化可能会引入相当大的误差。
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