An effective control method for CO2 capture system operation after photothermal assisted combustion

Abstract

The invention discloses an effective operation control method for a system for CO2 capture after photothermal assisted combustion. A limited object is a trough type system for CO2 capture after photothermal assisted chemisorption combustion with a molten salt energy storage function, an appropriate CO2 capture rate set value in a period of time in the future is estimated fully in accordance with current system energy storage, light intensity forecast and smoke volume forecast, a feedforward feedback control system is designed to implement smooth and fast tracking of the set value, the adaptation of the system for CO2 capture after photothermal assisted combustion to smoke and solar light intensity enhanced, and the operational regulation quality of the system is improved. The simulation results show that according to the method, the operation control of the system for CO2 capture after photothermal assisted combustion can be achieved well under the conditions that the light intensity and smoke flow change.

Description

Technical field

[0001] The invention relates to the technical field of thermal process control, in particular to an effective photothermal assisted combustion CO 2 Operation control method of capture system. Background technique

[0002] As the greenhouse effect and related climatic and ecological problems become increasingly severe, reducing CO emissions 2 It has become a key measure for the international community to deal with climate change. CO after combustion based on chemical adsorption 2 Capture technology directly separates CO from flue gas produced by fuel combustion 2 , Is a mature carbon capture technology that can be applied in the current chemical, power generation and other industries.

[0003] Limit CO after chemisorption combustion 2 The key problem of the large-scale application of capture technology is that the regeneration of chemical solvents during the operation of the decarbonization system requires a large amount of hot steam (such as extraction from the low-...

Examples

Embodiment Construction

[0025] Such as figure 1 As shown, the control method uses a trough photothermal assisted chemical adsorption with molten salt energy storage for CO after combustion 2 The capture system is the controlled object, select CO 2 Collection rate, reboiler temperature, superheated steam pressure, temperature, and molten salt temperature at the outlet of the trough solar collector are the system controlled quantities; select lean liquid flow, steam valve opening, saturated steam generator molten salt flow, superheat The molten salt flow rate of the collector and the molten salt flow rate of the collector are the system control quantities. First, based on the steady-state system model, considering the flue gas flow of thermal power plants, system energy storage, and illumination, determine the appropriate CO for system operation 2 The capture rate setting value and the feedforward control amount are combined with the feedback control system based on the PI loop to establish a phototherma...

Technical field

[0001] The invention relates to the technical field of thermal process control, in particular to an effective photothermal assisted combustion CO 2 Operation control method of capture system. Background technique

[0002] As the greenhouse effect and related climatic and ecological problems become increasingly severe, reducing CO emissions 2 It has become a key measure for the international community to deal with climate change. CO after combustion based on chemical adsorption 2 Capture technology directly separates CO from flue gas produced by fuel combustion 2 , Is a mature carbon capture technology that can be applied in the current chemical, power generation and other industries.

[0003] Limit CO after chemisorption combustion 2 The key problem of the large-scale application of capture technology is that the regeneration of chemical solvents during the operation of the decarbonization system requires a large amount of hot steam (such as extraction from the low-...

Examples

Embodiment Construction

[0025] Such as figure 1 As shown, the control method uses a trough photothermal assisted chemical adsorption with molten salt energy storage for CO after combustion 2 The capture system is the controlled object, select CO 2 Collection rate, reboiler temperature, superheated steam pressure, temperature, and molten salt temperature at the outlet of the trough solar collector are the system controlled quantities; select lean liquid flow, steam valve opening, saturated steam generator molten salt flow, superheat The molten salt flow rate of the collector and the molten salt flow rate of the collector are the system control quantities. First, based on the steady-state system model, considering the flue gas flow of thermal power plants, system energy storage, and illumination, determine the appropriate CO for system operation 2 The capture rate setting value and the feedforward control amount are combined with the feedback control system based on the PI loop to establish a phototherma...

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