CLOSE-TO-STREAMLINE NUMERICAL SIMULATION OF GAS-SOLID FLOW IN HIGH CONCENTRATION ESP GAS INLET HOOD
The close-to-streamline numerical simulation method was adopted to geometrically 1∶1 simulate large-scale high concentration ESP gas inlet hood and its complicated internal structures such as dedusting angle iron and two perforated gas distribution plates with up to ten thousands holes.The realizable k-e model and stochastic particle track model were used for gas-solid flow simulation.The numerical results showed the gas velocity, particle concentration and flow resistance distributions of the gas inlet hood.The comparison between simulation and field measurements showed good agreement.It demonstrated that the close-to-streamline numerical simulation method could accurately simulate the gas-solid flow in the high concentration ESP gas inlet hood in detail.As to the simulated gas inlet hood, the results illustrated that the velocity distribution in the exit was low at the center and high at the surrounding areas.Dedusting efficiency was about 27.6% and flow resistance was up to 766 Pa.