Study on a New type of Gas–liquid Cyclone used in COIL

Abstract In order to separate the gas–liquid products from new ejector singlet oxygen generator (SOG) effectively, we designed a new type of gas–liquid cyclone. The classical Muschelknautz cyclone model method, the improved method and computational fluid dynamics (CFD) code's discrete phase model (DPM) and eddy diffusion concept (EDC) were used for the new type separator's calculation and simulation. The results show that: (1) Compared with classical Muschelnautz model, the improved Muschelknautz model can predict the cyclone's separation performance more accurately; (2) On the design conditions, the smaller droplets have more complex trajectories. For droplets larger than 3 μm, their separation efficiency is over 80% in the new separator; (3) The droplets' entrance locations affect the droplets' trajectories and separation efficiency, (4) The residence time which CFD predicts ranges from 1 to 50 ms and decreases with the droplets size increasing (5) The loss of O 2 ( 1 Δ) in the gas phase is less than 1% and it loses primarily on the gas–liquid contact reaction.