【摘要】 针对碳捕集电厂的高能耗及CO₂的后续利用问题，设计了一种二次再热燃煤-捕碳-制甲醇一体化系统。以某1 000 MW超超临界二次再热机组为例，采用动态自适应粒子群优化算法对所提系统参数进行优化计算，分析了碳捕集率和光电制氢成本等因素对系统性能的影响。结果表明：当碳捕集率为90%时，一体化系统的热效率相比燃煤-捕碳机组提高了6.62%,CO₂排放强度降低了4.45 g/（kW·h）,净收益提高了33.42亿元；当碳捕集率在40%～90%内变化时，一体化系统的热效率能够稳定保持在49%以上；随着未来光电制氢成本的下降，一体化系统的净收益将显著提升。更多还原

【Abstract】 Aiming at high energy consumption and subsequent CO₂ utilization in power plants with carbon capture, an integration system of double-reheat coal-fired power unit with CO₂ capture and methanol production was designed. Taking a 1 000 MW double-reheat ultra-supercritical power generation unit as an example, the optimization of this proposed system was performed using dynamic adaptive particle swarm optimization algorithm. Then the influence of carbon capture rate and photoelectric hydrogen production cost on its performance was analyzed. Results show that at the carbon capture rate of 90%, the thermal efficiency and net benefit of this proposed system increase by 6.62% and 3.342 billion yuan, respectively, while the CO₂ emission intensity reduces by 4.45 g/（kW·h） compared with the coal-fired unit with CO₂ capture. The thermal efficiency of this integrated system can be maintained at above 49% when the carbon capture rate changes within the range of 40%～90%. As the cost of photovoltaic hydrogen production decreases, the net benefit of this integrated system will be significantly improved in the future.更多还原