In order to alleviate the impact of coal combustion on the environment, a scheme of biomass gasification in coal-fired ultra-supercritical power plant is proposed and simulated with Aspen plus. Simulation results show that the energy and exergy efficiencies of the coupled system have an increasing-decreasing tendency with the increase of the air/biomass ratio, reaching the maximum value when the air/biomass ratio is 1.6. The energy and exergy efficiencies of the coupled system decrease continuously with the increase of the excess air ratio. The coupled system has the highest energy and exergy efficiencies of 46.89% and 43.13%, which are 2.70% and 1.81% higher than those of an ultra-supercritical coal-fired system, respectively. Meanwhile, the coupled system has low CO₂, SO₂, and NO_x emissions and thus many advantages in terms of environmental performance.

为减轻燃煤对环境的影响，提出燃煤超超临界电厂生物质气化方案，并采用Aspen plus进行模拟。仿真结果表明，耦合系统的能量效率和火用效率随着空气/生物质比的增加呈递增减小的趋势，在空气/生物质比为1.6时达到最大值。耦合系统的能量和火用效率随着过量空气比的增加而不断降低。耦合系统的能源效率和火用效率最高，分别为 46.89% 和 43.13%，分别比超超临界燃煤系统高 2.70% 和 1.81%。同时，耦合系统具有低CO ₂、SO ₂和NO_x排放，因此在环境性能方面具有许多优势。