CO_2减排机理及与燃煤电厂集成特性的研究

Study on Mechanism of CO_2 Capture Process and its Integration with Power Generation Systems

推导了CO2吸收工艺系统再生能耗计算公式,分析了吸收剂性质对再生能耗的影响,计算得到不同质量分数下吸收剂的再生能耗;提出几种基于槽式太阳能辅助燃煤发电技术的CO2减排集成方案,以N600-24.2/566/566型发电机组为例,以集成系统热耗率、发电标准煤耗率和热效率作为经济性指标,采用热平衡法对不同集成方案机组的热经济性指标进行了计算和比较.结果表明:在加入太阳能热量和机组主蒸汽质量流量不变的情况下,集成方案5在设计辐照强度下的热耗率和发电标准煤耗率均最低,是最经济的集成方案.

Calculation formulae for regeneration energy consumption of a CO2 capture system were derived, while the influence of absorbent property on the regeneration energy consumption analyzed, after which corresponding regeneration energy consumptions were calculated under different mass fractions of absorbent. Taking the N600 24. 2/566/566 power unit as an example, a number of CO2 capture schemes were proposed based on integrated modes of solar-coal hybrid power generation system, in which case relevant thermo-economic indexes were calculated and compared using heat balance method, such as the heat consumption rate, the power generation standard coal consumption and the thermal efficiency, etc. Results show that the scheme 5 with application of solar energy is found to be the most economical one for its low est heat consumption rate and lowest power generation standard coal consumption, under conditions of design radiation intensity and constant main steam mass flow.