基于热经济学的富氧燃烧CO2捕获过程先进控制结构及其性能优化研究

富氧燃烧是最具应用前景的CO2捕获技术之一，系统优化与运行控制是降低能耗成本和促进商业推广的关键。然而，传统控制方法侧重于能耗或成本单一目标及单一控制层级优化，对基于多个控制层级耦合、能耗成本双重目标的控制优化机制尚不清晰。因此，本项目拟运用兼顾热力学与经济成本的热经济学理论优化运行控制，揭示热经济学与过程控制之间的关联，构建多层级耦合协同控制优化机制。结合动态模拟、先进控制及热经济学等，推导新型热经济学控制匹配判据，提出通用的动态热经济学方法，自上而下多层级优化控制目标、变量、匹配、动作、轨迹及性能，建立基于热经济学与模型预测控制相耦合的先进控制结构，获取不同运行工况下的动态特性，分析控制干预、策略及内部组成对运行能耗与成本形成的影响规律，从而实现富氧燃烧CO2捕获过程高效低成本运行控制。本项目的成功实施有望为富氧燃烧CO2捕获过程的优化设计、可靠运行和商业化应用提供理论依据和技术支撑。

Oxy-fuel combustion is considered as one of the best applicable and promising CO2 capture technologies, and the system optimization and operation control become the key points for reducing the energy-cost and promoting the commercial application for this technology. However, traditional control methods focus on the single target of energy consumption or economic cost and the optimization of single control hierarchy, while lack the clear understanding of a control optimization method based on the coupled multiple control hierarchies and energy-cost dual objectives. Therefore, the proposed project aims to employ the theory of thermoeconomics characterized with both thermodynamics and economic cost for optimizing the operation control, to uncover the correlation between thermoeconomics and process control, and to construct multi-level coupling collaborative control optimization mechanism. By the combination of dynamic simulation, advanced control and thermoeconomics, novel thermoeconomic-based control pairing criteria is theoretical derived, a new dynamic thermoeconomic method is developed, the control objective, variable, pairing, moves and reference trajectory are optimized in a way of multi-level and top-down, advanced control structure based on the integration of thermoeconomics and model predictive control is established, the dynamic behaviors during different operating conditions are identified, the impact laws of energy consumption from operation and cost formation caused by control intervention, strategy and inherent components are analyzed, and then the high energy efficiency and low economic cost operation control will be achieved for oxy-fuel combustion process with CO2 capture. The successful implementation of this project will offer the theoretical basis and technical support to achieve optimal design, reliable operation and commercial application for oxy-fuel combustion process with CO2 capture.