Abstract: Carbon capture technology is an important technical means to solve CO₂ emissions in China's power industry. In order to guide the selection of absorbents, processes, and equipment for large-scale carbon capture devices in coal-fired power plants, and to understand the actual operation rules of chemical absorption carbon capture devices in coal-fired power plants, Relying on the 150,000-ton-per-year carbon capture device that has been built by Guoneng Jinjie, which adopts new energy-saving processes, novel absorbents, and optimized equipment, and has achieved long-term operation. Comprehensively considering key performance indicators such as amine concentration in the absorbent, the CO₂ load of the absorbent, pollutant emissions, capture rate, and regeneration heat consumption, a targeted test method is studied to evaluate the performance of mixed amine absorbents in industrial-scale carbon capture devices. The effectiveness of the main innovative energy-saving processes in the carbon capture device was analyzed. Based on operational data, the study comparatively evaluated three energy-saving processes: inter-stage cooling, rich solvent split, and lean solvent flash compression （MVR）. Further investigation was conducted into the relationship between pollutant emissions at the top of the absorber and the wash water temperature of the absorber. The results show that the gas-liquid ratio of the absorbent significantly affects the gas-liquid mass transfer process in the absorber, thereby substantially influencing regeneration heat consumption and process parameters. When the gas-to-liquid ratio is between 4 and 4.1, the carbon capture system achieves optimal regeneration heat consumption; the interstage cooling process can improve the absorption performance of the absorption tower, achieving optimal results at a cooling temperature of 40 ℃, where the regeneration heat consumption decreases by about 9.7%; The outlet temperature of the absorber should be controlled within 40-50 ℃ to maintain controllable pollutant emission levels; The rich liquid splitting effectively recovers system heat, reducing regeneration heat consumption by about 12% when the rich liquid splitting ratio is approximately 5%; the energy-saving effect of the MVR process is closely related to the pressure difference, and the overall regeneration energy consumption of this carbon capture facility can reach 2.35 GJ/tCO₂.