| A new mist eliminator is raised by comparing the characteristics of traditional demisters in the paper. The article introduces the characteristics of new mist eliminator, analyses the air flow of demister and droplet force. A three-dimensional model is draw with CAD software in light of the actual conditions and analog design of swirl plate. The model is put into the CFX software for numerical simulation of the internal flow field, to get information of its internal flow, fluid velocity, pressure distribution and trajectory map of particle. According to the simulation results, maximum tangential velocity appears near wall. By comparing the analysis result, its performance of mist eliminator can be easily and quickly forecast. The basis is provided for improved design of structural parameters and operation parameters.The results of simulations in two cases of passive freestyle impeller and static impeller, reveal that droplets distribution in the tangential velocity, and droplets volume fraction are superior to traditional swirl plate of static impeller. Thus, new mist eliminator is obviously better than traditional swirl plate in mist removing efficiency. This explains that it is easy to get internal flow field information by CFX simulation of the gas-liquid two-phase flow in the demisters. Therefore, the method of CFX simulation is more convenient and intuitionistic to comparative analysis.The simulation result is basically consistent with theoretical analysis to show that characteristics of flow in demister by CFX software simulation is correct. And Reynolds stress model and the particle trajectory model used to simulate both are feasible and able to handle two-phase flow problems in demisters. The demister separation characteristics determined by the numerical results can be used for a reasonable reference of mist eliminator design.
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