湿法烟气脱硫喷淋塔的持液特性

在喷淋塔内部增设湍流装置是提高脱硫效率的有效途径之一，因此以自行设计的湍流装置的冷态喷淋塔为对象，考察了气速、喷淋量、液气比（L/G）、湍流装置水平和垂直间距对其持液特性的影响。实验结果表明，当湍流装置结构形式一定时，液体在塔内的停留时间随气速的增大而增大，随喷淋量、L/G的增大而减小；湍流层的持液量随气速、喷淋量、L/G的增大而增大；当气速、L/G一定时，液体在塔内的停留时间和持液量均随湍流装置水平和垂直间距的增大而减小。当气速、喷淋量、L/G、湍流装置水平和垂直间距分别为3.6 m·s-1、100 m3·h-1、10 L·m-3、X1、Y1时，液体的最大停留时间为24.58 s；而当气速、喷淋量、L/G、湍流装置水平和垂直间距分别为3.6 m·s-1、240 m3·h-1、25 L·m-3、X1、Y1时，湍流层的最大持液量为1.093 m3。对实验数据进行多元线性回归分析，得出该湍流式喷淋塔持液量的经验公式，其拟合优度与显著性良好，对工业应用具有一定的参考价值。

Liquid holdup characteristic of wet flue gas desulfurization spraying scrubber

Because adding a turbulence device to spraying scrubbers is one of the most effective ways to increase the desulfurization efficiency,the present experiment investigates a cold-condition spraying scrubber equipped with a self-designed turbulence device. The influence of various factors on the liquid holdup characteristics was studied,including airflow velocity,spraying volume,liquid-gas ratio (L/G),and the horizontal and vertical intervals of the turbulence device. According to the results,when the structure of the turbulence device is fixed,the retention time of liquid in the scrubber increases with the airflow velocity but decreases with increasing spraying volume and L/G. In addition,increasing the airflow velocity,spraying volume,and L/G increases the liquid holdup of the turbulence layers. In other words,when the airflow velocity and L/G are fixed,the retention time and the liquid holdup of the liquid decrease with increasing the horizontal and vertical interval of the turbulence device. When the airflow velocity,spraying volume,L/G,and horizontal and vertical interval of the turbulence device are 3.6 m·s-1,100 m3·h-1,10 L·m-3,and X1,Y1,respectively,the maximum retention time of the liquid is 24.58 s. Meanwhile,when the respective values are 3.6 m·s-1,240 m3·h-1,25 L·m-3,and X1,Y1,the maximum liquid holdup of the turbulence layers is 1.093 m3. After applying multivariate linear regression analysis,the empirical formula is obtained. Based on the usefulness of these results,we expect them to be of reference value for industrial applications.