Carbon Capture Assembly Scheduling for Low-Load Thermal Power
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Solution Overview
Problem
Existing carbon capture technologies in thermal power generation systems result in unnecessary energy consumption, poor environmental protection, and economic inefficiencies due to the minimum technical output of thermal power sets during low load operations.
Innovation Solution
A carbon capture power generation system that shifts the energy consumption of a regeneration tower from thermal power generation at night to low load thermal power supply during the day, utilizing a carbon capture assembly with an absorption tower, regeneration tower, rich solution transfer tank, and lean solution transfer tank, and a control unit to manage the flow of carbon dioxide-rich and lean liquids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thermal power sets operate at minimum technical output (50% rated capacity) during low load operations to maintain grid stability, then power supply reliability is improved, but energy consumption increases and environmental protection deteriorates
Solution Approach 1:
The system performs carbon dioxide absorption during nighttime when thermal power sets operate at low load, storing the carbon dioxide-rich liquid in a storage tank. This preliminary action allows the system to accumulate carbon dioxide capture capacity in advance, so that during daytime high load operations, the thermal power sets can operate at full capacity without being constrained by carbon capture requirements, thereby maintaining power supply reliability while reducing overall energy consumption and emissions.
Solution Approach 2:
The system implements periodic carbon capture operations alternating between nighttime absorption mode and daytime desorption mode. During nighttime, the absorption tower operates to capture carbon dioxide; during daytime, the regeneration tower operates to release concentrated carbon dioxide. This periodic action allows thermal power sets to optimize their output according to daily load patterns, maintaining reliability during peak hours while improving energy efficiency during off-peak hours.
2Reliability
If thermal power sets operate at minimum technical output (50% rated capacity) during low load operations, then power supply reliability is improved, but economic efficiency deteriorates
Solution Approach 1:
The system performs carbon dioxide absorption during nighttime when thermal power sets operate at low load, storing the carbon dioxide-rich liquid in a storage tank. This preliminary action allows the system to accumulate carbon dioxide capture capacity in advance, so that during daytime high load operations, the thermal power sets can operate at full capacity without being constrained by carbon capture requirements, thereby maintaining power supply reliability while reducing overall energy consumption and emissions.
Solution Approach 2:
The system implements periodic carbon capture operations alternating between nighttime absorption mode and daytime desorption mode. During nighttime, the absorption tower operates to capture carbon dioxide; during daytime, the regeneration tower operates to release concentrated carbon dioxide. This periodic action allows thermal power sets to optimize their output according to daily load patterns, maintaining reliability during peak hours while improving energy efficiency during off-peak hours.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system reduces the minimum technical output of thermal power supply units, enhances environmental protection, and improves the economic efficiency of power grid operations by optimizing the use of power generated during low load operations.
Implementation Method 1
the flue gas generated by the thermal power supply unit is directly discharged to the absorption tower for absorbing carbon dioxide in the flue gas
Implementation Method 2
the carbon dioxide rich liquid stored in the rich solution transfer tank can be discharged to the regeneration tower via a third branch for high temperature desorption, thereby releasing carbon dioxide
Data Source
Figure 1
AI summary
Disclosed is a carbon capture power generation system. The carbon capture power generation system includes a thermal power supply unit, a photovoltaic power supply unit, a carbon capture assembly and a control unit, wherein the carbon capture assembly includes an absorption tower, a regeneration tower, a rich solution transfer tank and a lean solution transfer tank, an exhaust port of the thermal power supply unit is in communication with an air inlet of the absorption tower, a liquid outlet of the absorption tower is in communication with the rich solution transfer tank via a first branch, a liquid inlet of the absorption tower is in communication with the lean solution transfer tank via a second branch, a liquid inlet of the regeneration tower is in communication with the rich solution transfer tank via a third branch, a liquid outlet of the regeneration tower is in communication with the lean solution transfer tank via a fourth branch, the control unit can open the first branch and the second branch and close the third branch and the fourth branch when the thermal power supply unit supplies power to a power consumption side, and open the first branch, the second branch, the third branch and the fourth branch when the photovoltaic power supply unit supplies power to the power consumption side.