The viscosity of adiponitrile waste liquid is as high 1000 cp. It challenging to spray and atomize the normally. Based on coaxial three-channel pneumatic atomizer, a two-stage supersonic steam atomizer proposed in this paper, atomization process simulated by Fluent software. Compared with traditional simulation method, Volume-of-Fluid Discrete-Phase-Model (VOF-DPM) bi-directional coupling model...