Numerical and Experimental Study on the Particle Erosion and Gas-Particle Hydrodynamics in a Codirectional Swirling Spouted Bed

The experimental and simulative methods were used to study the hydrodynamic characteristics of gas–solid two-phase flow and particle erosion in a codirectional swirling spouted bed (CSSB). The four-zone flow of particles was found in the filling zone: separation zone, convergence zone, re-separation zone, and particle accumulation zone. The internal reinforced structure effectively strengthened the radial velocity of particles in the cylinder. In addition, the two serious erosion zones on the axial swirl vane were, respectively, in the convergence zone and particle accumulation zone, and the erosion heights were, respectively, roughly 0.045 m on the A-face and 0.076 m on the B-face. The erosion heights on the cylinder internal walls were basically 0.15 m with the increase of the inlet velocity. By comparing the axial swirling spouted bed, integrated multinozzle swirling spouted bed, and CSSB, it was found that CSSB had a better swirling effect and smaller intensity of particle erosion.