By taking a 150 000 tons/year carbon dioxide capture system in a power plant as the research object

a comprehensive analysis was conducted for its water usage

water consumption and water balance. Moreover

the water balance of the carbon capture system was experimentally studied and compared under different loads. The experimental results show that

the main problem in the current capture system's water balance is that the outlet temperature at the top of the absorption tower is higher than the inlet flue gas temperature. Under high-load conditions

the reaction heat inside the absorption tower is relatively large

resulting in an excessively high exhaust steam temperature and a significant increase in system water consumption. After the outlet temperature of the absorption tower was reduced from 54 ℃ to 43 ℃

the system water consumption reduced by approximately 86.7%

demonstrating remarkable energy-saving effects. In light of this

combined with the actual operation situation

suggestions are put forward to further improve the temperature field of the absorption tower and reduce the outlet temperature of the absorption tower by adjusting the circulating water volume and enhancing the heat transfer efficiency of the lean solution cooler and the tail gas scrubber. The experimental results can provide guidance for efficient and economical operation of carbon capture systems.