In this work, the gas–solid flow and water vaporization process are simulated by the method of Euler–Eulerian two-fluid model in a three-dimensional spouted bed, which have a significant influence on the desulfurization efficiency. The results of simulation indicate that the change trends of the particle volume fraction are similar under superficial gas velocities of 0.7 and 0.8 m/s. The degree of particle pulsation is the highest at the bottom of the spout area, and the degree of gas pulsation is the highest at the junction of the annulus area and spout area. The temperatures of gas, liquid, and particles are also analyzed. The results demonstrate that in the spout area, the gas temperature is much higher than that of the liquid and particles, but the three phases are uniformly mixed and have similar temperatures in other areas. Moreover, water vaporization mainly occurs at the junction of the annulus area and the spout area, a small amount of liquid is vaporized at the center of the spout area, and basically no vaporization reaction occurs in the outer radius of the annulus area. With the increase in gas velocity, gas temperature, and liquid temperature and the decrease in gas humidity, water vaporization reaction is promoted.

中文翻译：

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烟气脱硫三维喷射床中水汽化过程的CFD分析

在这项工作中，采用欧拉-欧拉二流体模型在三维喷流床中模拟了气固两相流和水的汽化过程，这对脱硫效率有重要影响。模拟结果表明，在0.7和0.8 m / s的表观气速下，颗粒体积分数的变化趋势相似。在喷口区域的底部，颗粒脉动的程度最高，而在环空区域与喷口区域的连接处，气体的脉动程度最高。还分析了气体，液体和颗粒的温度。结果表明，在喷口区域，气体温度比液体和颗粒的温度高得多，但是三相均匀混合并且在其他区域具有相似的温度。此外，水的汽化主要发生在环空区与喷口区的交界处，少量的液体在喷口区的中心汽化，并且在环空区的外半径上基本上没有汽化反应发生。随着气体速度，气体温度和液体温度的增加以及气体湿度的降低，水汽化反应被促进。