CAJ | 학술논문

由于电力需求的波动，受上游碳捕集电厂负荷变化的影响，胺法脱碳系统本质上是一个动态系统。但绝大多数关于胺法脱碳系统的研究是基于稳态运行方式展开的，对碳捕集系统动态研究还处于起步阶段。文中基于一个典型的燃煤电厂胺法脱碳装置，应用Aspen Dynamics软件建立胺法脱碳系统动态模型。研究了带基本控制结构胺法脱碳系统在再沸器热功率、烟气流量及烟气组分阶跃变化时，吸收和再生过程的动态响应特性。结果表明，在阶跃扰动下，CO2脱除率发生阶跃变化。为了实现固定的 CO2脱除率，提出2种比例控制策略，根据烟气处理量及组分浓度变化，分别通过调节贫液流量及贫液CO2担载量来保持固定的CO2脱除率。动态分析表明，在烟气流量及组分阶跃变化时，2种控制策略下的胺法脱碳系统均可以实现固定的CO2脱除率。
유우전력수구적파동，수상유탄포집전엄부하변화적영향，알법탈탄계통본질상시일개동태계통。단절대다수관우알법탈탄계통적연구시기우은태운행방식전개적，대탄포집계통동태연구환처우기보계단。문중기우일개전형적연매전엄알법탈탄장치，응용Aspen Dynamics연건건립알법탈탄계통동태모형。연구료대기본공제결구알법탈탄계통재재비기열공솔、연기류량급연기조분계약변화시，흡수화재생과정적동태향응특성。결과표명，재계약우동하，CO2탈제솔발생계약변화。위료실현고정적 CO2탈제솔，제출2충비례공제책략，근거연기처리량급조분농도변화，분별통과조절빈액류량급빈액CO2담재량래보지고정적CO2탈제솔。동태분석표명，재연기류량급조분계약변화시，2충공제책략하적알법탈탄계통균가이실현고정적CO2탈제솔。
The amine-based CO2 capture system is an inherently dynamic system that is affected by the load variations in the up-stream power plant due to fluctuations in electricity demand. However, most of researches in this field are based on the steady state operation model, little dynamic data and analysis of the dynamic behavior of a CO2 capture system are available in open literatures. A dynamic model of amine-based CO2 capture system was developed with Aspen Dynamics software based on a typical coal fired power plant. Dynamic responses of the amine-based CO2 capture system with basic control structure were studied when step change in reboiler heat duty, flue gas flowrate and CO2 composition. The results show that the CO2 removal efficiency is influenced by the flue gas disturbances. The CO2 removal target is guaranteed by two proportional control strategies, and operating parameters can be adjusted according to the changes of the flowrate and CO2 composition in flue gas. Dynamic simulations show that the CO2 capture system can achieve removal targets with the proposed control strategies.