As a high-energy consumption industry,the waste heat recovery efficiency of the sintering process in the iron and steel industry is low,which has become a key problem that needs to be solved urgently. In view of the energy waste caused by unreasonable parameter design of the domestic annular cooler waste heat power generation system,In this paper, the thermodynamic model of the double-pressure waste heat power generation system and the porous dielectric fluid-solid coupling heat transfer model of the cooling process of sinter are constructed,and the influence of key parameters such as cooling wind speed,material layer height and steam pressure on the power generation and power supply of tons of ore is systematically analyzed. The results show that there is an optimal value range (1. 6 ~ 2. 0 m/ s) for cooling wind speed, which can maximize the power supply per ton of ore,the ore temperature is increased from 450 ℃ to 700 ℃,and the wind speed corresponding to the optimal power supply per ton of ore is also increased from 1. 6 m/ s to 1. 9 m/ s. Appropriately increasing the height of the material layer can significantly enhance the efficiency of waste heat recovery,and the increase in power generation exceeds the additional energy consumption caused by the operation of the fan. When the material layer is increased to 2. 0 m,the power generation per ton can be increased from 14. 38 kW·h/ t at 1. 0 m to 19. 31 kW·h/ t (under the basic condition of 600 ℃ mine temperature) . Under the operating conditions corresponding to a mineral temperature of 600 ℃,it is recommended to select a high-pressure steam pressure of 1. 5 MPa to 2. 0 MPa (gauge pressure) and a low-pressure steam pressure of 0. 5 MPa to 0. 8 MPa (gauge pressure). The combined optimization of these two parameters helps further enhance the economic efficiency of the system. At 600 ℃ sinter temperature,the maximum tonnage power generation is increased from 22. 63 kW·h/ t corresponding to 1. 6 MPa(g) for high-pressure steam and 0. 5 MPa(g) for low-pressure steam to 23. 73 kW·h/ t corresponding to 4. 0 MPa(g) for high-pressure steam and 1. 2 MPa(g) for low-pressure steam. The maximum tonnage of ore power supply is increased from 17. 41 kW·h/ t corresponding to 1. 6 MPa (g) for high-pressure steam and 0. 6 MPa (g) for low-pressure steam to 18. 54 kW·h/ t corresponding to 4. 0 MPa(g) for high-pressure steam and 1. 3 MPa(g) for low-pressure steam. The results can provide a theoretical basis for the parameter design and engineering application of the waste heat power generation system of the annular cooler,and have important guiding significance for improving the energy utilization efficiency of the iron and steel industry.