气体分布器对浆态床环流反应器内流体流动特性影响的研究

基于一种浆态床环流反应器冷模试验装置,采用3种不同的气体分布器,考察了分布器结构对环流反应器流体力学特性的影响,为费托合成浆态床反应器及其内构件的设计和放大提供依据。试验结果表明:金属烧结板气体分布器的分布均匀性最好,但容易堵塞,不能满足长期稳定运行的要求。通过对不同开孔方向的两种双环管分布器进行比较,发现开孔向下时,总平均气含率高、气/液(浆)相界比表面积大,更适合应用于浆态床环流反应器。

INFLUENCES OF GAS DISTRIBUTORS ON HYDRODYNAMIC CHARACTERISTICS IN SLURRY LOOP REACTOR

In an airlift loop slurry reactor, three gas distributors were used to investigate the influences of the gas distributor structure on the hydrodynamics of the gas - slurry system. With the experimental data and equations, it is very useful to design and scale up the slurry re- actor. The experimental data showed that a more uniform distribution of bubbles can be obtained by the sintered plate distributor, comparing with the other two distributors. However, the sin- tered plate distributor tends to be clogged so it is unsuitable for a long period operation. In the sense of the a long period operation, the double - pipe ring gas distributor with the downward hole direction is more suitable for the slurry reactor with higher gas holdup and larger specific surface area.