Abstract: To achieve the cascade utilization of low-temperature waste heat from cement kilns and the carbon capture of flue gas, a novel flash-type waste heat power generation system integrated with carbon capture unit was proposed. The primary saturated flash steam of the waste heat power generation system was used as the heat source for the carbon capture unit. Then, the saturated water generated steam through the secondary flash, and the generated steam was sent to the steam turbine as supplementary steam to generate power. The Aspen Plus and Ebsilon software were used to simulate the carbon capture unit and the waste heat power generation system, respectively. The thermal integration of the system was optimized, and the technology of the carbon capture unit was further improved to reduce carbon capture energy consumption. Meanwhile, from perspectives of energy and exergy, the thermal performance variation of the system after integrated with the carbon capture unit was deeply analyzed. On this basis, the influence of carbon capture energy consumption on the performance of the novel system was further analyzed. Results show that the proposed system has a generating capacity of 7.452 MW, and captures about 110 000 tons of CO₂ annually. The carbon capture energy consumption rate decreases from 3.58 GJ/t to 3.08 GJ/t, and the cycle efficiency and net power generation efficiency can be increased by 0.51 and 0.9 percentage points, respectively.