微气泡技术在鼓泡塔中的实验研究

Experimental study of microbubble technology in bubble column

将微气泡发生装置与传统鼓泡塔相结合,设计搭建了一套微气泡鼓泡塔实验装置,选取影响鼓泡塔返混虚拟级数的进水压力、进水流量、进气流量、高径比等主要因素,设计了混合正交实验,分别在微气泡与普通气泡两种不同进气方式下,开展了鼓泡塔内液相返混程度对比实验,并进一步采用碱吸收二氧化碳法进行了塔内气液两相反应过程的模拟实验研究。实验结果表明,各因素对微气泡鼓泡塔内液相返混影响程度依次为:进气流量>进水流量>进水压力>高径比;且与传统鼓泡塔相比,微气泡鼓泡塔能够有效改善塔内液相返混程度,并可一定程度上加速鼓泡塔中气液反应进程。

]Experimental setup for bubble colum n with microbubble was designed and built by combining the microbubble generator with the conventional bubble column. A mixed orthogonal experiment was designed according to the main factors on the virtual series of the backmixing,water inlet pressure,water inlet flow rate,gas inlet flow rate,ratio of height to diameter. By using two different gas inletting methods for microbubble and conventional bubble respectively,the comparative experiments for liquid backmixing degree in bubble column were carried out. To further investigate gas-liquid reaction process,a simulation experiment was carried out in alkaline absorption of carbon dioxide method. The experimental results showed that the degree of factors effecting on the liquid backmixing in the bubb ling column with microbubble was as followsgas inlet flow rate〉 water inlet flow rate〉 water inlet pressure〉ratio of height to diameter. Moreover,in comparison with the conventional bubble column,the bubble column with microbubble effectively improved the liquid backmixing,and accelerated the gas-liquid reaction process in the bubble column to a certain extent.