A numerical simulation of PM adhesion characteristics in a fluidized bed type PM removal device by a finite volume Eulerian–Eulerian method

• A PM adhesion model considering PM deposition is introduced into the simulation code.
• PM adheres mainly to the bed particle in the high solid phase fraction region.
• PM is approximately uniformly collected on the entire bed particle phase.

Fluidized bed has been used in a PM removal device to remove PM2.5 effectively through the use of adhesion force, experimentally demonstrating the capability for effective PM2.5 removal. In the present work, numerical simulations of this device have been performed using the Eulerian–Eulerian method for the further development of this device. The results obtained by the Gidaspow drag force model and using the EMMS method are compared to the reference data to verify the drag force model, and it is shown that the EMMS method is better than the Gidaspow drag force model. The filtration mechanism of Clift et al. was incorporated in the simulation code to calculate the behavior of PM adhesion in the fluidized bed type PM removal device. However, the predicted results differ substantially from the experimental results. Therefore, a PM adhesion model that considers PM deposition has been incorporated in the simulation code, and numerical simulations have been conducted to analyze the behavior of PM adhesion in the fluidized bed type PM removal device. It was found that these numerical simulations represent the characteristics of PM adhesion in the fluidized bed type PM removal device with a high degree of accuracy. The predicted results show that PM adheres mainly to the surface of the bed particle at the high volume fraction of the bed particle phase and is approximately uniformly collected over the entire bed particle phase.

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