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Minimum Fluidization Velocity Experimental Research Based on Biomass Internal Circulation Fluidized Bed

机译：基于生物质内循环流化床的最小流化速度实验研究

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摘要

Based on cold experiment device of biomass internal circulation fluidized bed, different sizes of silica sand and bed material heights experiments were done under normal temperature and pressure respectively, influences of particle sizes and heights of the bed material on minimum fluidization velocity were analyzed from the relationship diagram between differential pressure and air velocity. The results show that minimum fluidization velocity increases as particle diameters increases; and it is independent from bed material height. A thorough literature survey on the calculation correlations of minimum fluidization velocity was conducted, which revealed that the relative errors between values predicted by the calculation correlations and the experimental values were huge. The calculation method of minimum fluidization velocity was given based on modified Ergun equation and minimum fluidization voidage estimation calculation, the predicted values of the method are in good agreement with the experimental values, the relative error is less than 10%, and it provides a reliable reference basis for internal circulation fluidized bed structure optimization, amplification design and operation. Here, we also discussed few related patents.
机译：在生物质内循环流化床冷实验装置的基础上，分别在常温常压下进行了不同尺寸的硅砂和床料高度实验，从关系式分析了床料粒径和高度对最小流化速度的影响。压差和空气速度之间的关系图。结果表明，最小流化速度随粒径的增加而增加。它与床料高度无关。对最小流化速度的计算相关性进行了详尽的文献调查，结果表明，由计算相关性预测的值与实验值之间的相对误差很大。根据修正的Ergun方程和最小流化空隙率估算计算结果，给出了最小流化速度的计算方法，该方法的预测值与实验值吻合较好，相对误差小于10％，提供了可靠的依据。内循环流化床结构优化，放大设计和运行的参考依据。在这里，我们还讨论了一些相关专利。

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