Particulate‐laden‐SO2 scrubbing in a tapered bubble column
Particulate‐laden‐SO2 scrubbing in a tapered bubble column
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锥形鼓泡塔中含有颗粒物的 SO2 洗涤
DOI：
10.1002/ep.10307
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发表时间：
2009
影响因子：
2.8
通讯作者：
M. N. Biswas
中科院分区：
文献类型：
--
作者：
A. Bandyopadhyay;M. N. Biswas
本文报道了一种锥形鼓泡塔的性能，该塔在类似的流体动力学条件下比现有系统产生更高的分数气含率和最少的功耗，用于颗粒负载的SO2洗涤。首先，静态批研究进行了分析SO2去除在不同的初始颗粒浓度。结果表明，颗粒的存在下提高了SO2去除效率约14-27%，这是由促进吸附传质阐明。在随后的实验中分析了该系统的性能，该实验在连续模式下使用水和稀NaOH对载有颗粒的SO2进行洗涤。结果表明，由于柱几何形状的改变，SO2的去除效率提高到约25%/（W/m3），并且由于在所研究的变量范围内存在颗粒（飞灰），SO2的去除效率提高到约16.7%/（W/m3）。对颗粒物和碱洗对脱硫效果的影响进行了定量分析和比较。从实验结果中确定了SO2和颗粒物单独或组合的最大去除效率（≥ 100%）的操作制度。经验和半经验关联式分别用于预测锥形塔在水和稀NaOH中的洗涤性能。实验值与预测值吻合良好。介绍了锥形鼓泡塔对颗粒物和SO2单独或联合洗涤的优越性。© 2008美国化学工程师协会环境规划，2009
The performance of a tapered bubble column that generates higher fractional gas hold up with least power consumption than existing systems under similar hydrodynamic conditions is reported in this article for particulate‐laden‐SO2 scrubbing. Firstly, quiescent batch studies were carried out to analyze SO2 removal at various initial particle concentrations. Results revealed that presence of particles improved the SO2 removal efficiency to about 14–27% that was elucidated by the facilitated adsorptive mass transport. The performance of the system was analyzed in subsequent experimentation operating it under continuous mode for particulate‐laden‐SO2 scrubbing using water and dilute NaOH. Results indicated that the removal efficiency of SO2 was improved to about 25%/(W/m3) due to change in the column geometry and to about 16.7%/(W/m3) due to presence of particles (fly‐ash) within the range of variables studied. The enhancement of removal of SO2 due to presence of particulate matter and that due to alkali scrubbing were quantified and compared. Operating regimes of maximum removal efficiencies (∼100%) of SO2 and particulates either alone or in combination were determined from experimental results. Empirical and semi‐empirical correlations were developed for predicting the scrubbing performances of the tapered column in water and dilute NaOH, respectively. Experimental values fitted excellently well with the predicted values. The superiority of the tapered bubble column over a conventional bubble column for scrubbing of particulates and SO2 either alone or in combination was described. © 2008 American Institute of Chemical Engineers Environ Prog, 2009