On restraining the backmixing of particles across baffles, baffles with more layers, with lesser vane gap and with lesser inclination angle of vane will be better.

• 较小的叶片间距将有助于破碎气泡，也有助于抑制颗粒轴向的返混；较小的叶片倾角将有助于抑制颗粒轴向的返混，但对气泡破碎的影响不大。