釜式泰勒流反应器流动特性与传质机理研究

通过设计一种气液混合射流的方案，在搅拌釜式反应器底部加装气体分布器，生成泰勒涡流。采用数值模拟和实验相结合的方法分析反应器内涡流流动特性及传质机理。结果表明：搅拌釜式反应器内泰勒涡流随旋转雷诺数变化的演变规律与常规泰勒反应器内涡流的演变规律类似；泰勒涡流的生成在搅拌釜式反应器原有的全混流流型中构建出局部的平推流区域，降低了返混；平推流区域随着旋转雷诺数的增加而扩大，在临界旋转雷诺数工况下可使反应器气相均布性提升28%，溶氧速率提升5倍左右，有效地改善了反应器内流动状况，强化了气液间的传质效率。研究结果为突破常规泰勒流反应器反应空间小的局限、扩大生产规模提供了理论研究依据，对釜式反应器的改装具有普适性，简便易行。

Flow characteristics and mass transfer performance of stirred tank Taylor reactor

Taylor vortexes were generated by installing a gas distributor at the bottom of a stirred tank reactor. The eddy current flow characteristics and mass transfer mechanism in the reactor were analyzed by numerical simulations and experiments. The results show that the evolution of Taylor vortex in stirred tank reactor with rotating Reynolds number is similar to that in a conventional Taylor reactor. Taylor vortexes generated in the stirred tank reactor create a partial horizontal push flow region in the original full mixed flow pattern, which reduces backmixing. The horizontal push flow area expands with the increase of rotating Reynolds number. Under the condition of critical rotating Reynolds number, the gas phase homogeneity of the reactor is increased by 28% and the dissolved oxygen rate is increased by about 5 times, which effectively improves the flow condition in the reactor and strengthens the mass transfer efficiency between gas and liquid. The research results provide a theoretical basis for breaking through the limitation of small reaction space of conventional Taylor flow reactor and expanding production scale, and the refit of kettle reactor is universal and easy to operate.