Summary
Carbon capture and storage adopted by power plants has been extensively studied in recent years. However, little attention has been paid to carbon capture and storage for steel plants. After considering the differences between steel and power plants, a carbon capture system of reheating furnace flue gas is designed, based on the sensible heat of continuous casting slabs. As a result, a significant amount of waste heat resource from rolling mills can be effectively reused. By using Aspen Plus to optimize parameters of the capture system, such as regeneration pressure and reflux ratio, the regeneration energy consumption is obtained and the result is verified by comparing the data with that of other research. Under the constraint condition of 90% CO2 capture rate, simulation results show that the purity of CO2 obtained is 98.4%, and the annual CO2 capture capacity is about 70 000 tons. Finally, main parameters of continuous casting slabs and the heat recovery boiler are calculated. The heat load of the steam supplied for the reboiler is 8.5 MW, indicating that this steam generation method matches the carbon capture system.