With a 405 m2 annular sinter cooler as research objects

the two-dimensional steady-state numerical model of annular sinter cooler was established on the basis of the porous media and local non-equilibrium thermodynamics theory. The moving speed along with the moving direction of sinter trolley was defined into the numerical model with the help of user-defined functions in COMSOL. The main factors influencing the sinter waste heat recovery and influence laws were analyzed. The enthalpy exergy of outlet cooling air of annular sinter cooler was taken as the evaluation index of parameter optimization

and the suitable operating parameters combination of first and second stages in annular sinter cooler were obtained through the method of orthogonal experiment. The results show that when the other operating parameters are constant

the enthalpy exergy of outlet cooling air first increases and then decreases with the increase of inlet air velocity. The suitable operating parameters are as follows. The standard flow of inlet cooling air is 8.3×105 m3·h-1. The height of sinter bed layer is 1.6 m and the temperature of inlet cooling air is 424 K. Under this condition

the exergy of outlet heat carrier increases by 11.09% than existing working condition.