CO2 Capture System Controller Regulating Heat and Liquid Levels
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Solution Overview
Problem
Carbon dioxide capture systems face challenges in stably and continuously supplying a certain amount of carbon dioxide due to fluctuations in exhaust gas concentration and efficiency reductions caused by absorbing liquid deterioration.
Innovation Solution
A carbon dioxide capturing system that includes an absorber and regenerator with a controller regulating heat energy and liquid levels, using flowmeters and liquid level gauges to maintain consistent carbon dioxide flow rates and liquid levels, and adjusting operations to mitigate fluctuations and restore efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If carbon dioxide capturing system operates continuously, then carbon dioxide supply is maintained, but fluctuations in exhaust gas concentration and absorbing liquid deterioration cause unstable supply
Solution Approach 1:
The controller receives signals from flowmeters measuring carbon dioxide flow rate and from liquid level gauges measuring absorbing liquid levels, then adjusts the operations of the absorber and regenerator to maintain stable carbon dioxide supply while compensating for fluctuations in exhaust gas concentration and absorbing liquid deterioration
Solution Approach 2:
The system dynamically adjusts operational parameters including heat energy supply to the regenerator and liquid levels in the absorber and regenerator based on real-time measurements, allowing the system to adapt to changing conditions and maintain stable carbon dioxide capture despite varying exhaust gas composition and absorbing liquid performance
2Reliability
If absorbing liquid is used for carbon dioxide capture, then carbon dioxide can be absorbed from exhaust gas, but absorbing liquid deteriorates over time reducing system efficiency
Solution Approach 1:
The regenerator separates and recovers the absorbing liquid from the carbon dioxide stream, allowing the liquid to be reused in the absorber while the carbon dioxide is purified and supplied to the use destination, thereby extending the service life of the absorbing liquid and maintaining system efficiency over time
3Productivity
If heat energy is supplied to regenerator to separate carbon dioxide, then carbon dioxide can be recovered, but energy consumption increases
Solution Approach 1:
The regenerator continuously separates carbon dioxide from the absorbing liquid through heat energy supply, maintaining a steady state where carbon dioxide is constantly recovered and supplied to the use destination, ensuring continuous operation without interruption
Solution Approach 2:
The regenerator utilizes phase transition of water from liquid to vapor through heating, allowing carbon dioxide to be separated from the absorbing liquid solution, enabling efficient carbon dioxide recovery while managing energy consumption through controlled evaporation
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
The system stabilizes carbon dioxide capture by controlling heat energy and liquid levels, maintaining consistent flow rates and restoring efficiency despite fluctuations, ensuring reliable carbon dioxide supply.
Implementation Method 1
an absorber configured to absorb carbon dioxide from first gas into lean liquid
Implementation Method 2
a regenerator configured to separate third gas including the carbon dioxide from the rich liquid flowing from the absorber
Data Source
AI summary
In one embodiment, a carbon dioxide capturing system includes an absorber to absorb CO2 from first gas into lean liquid, and produce rich liquid that is the lean liquid absorbing the CO2 and second gas that is the first gas removing the CO2, and a regenerator to separate third gas including the CO2 from the rich liquid flowing from the absorber, and provide the lean liquid and the third gas. The system further includes a flowmeter to measure a flow rate of the third gas, a liquid level gauge to measure a liquid level of the lean liquid and/or the rich liquid, and a controller to regulate a quantity of heat energy supplied to the regenerator based on the flow rate of the third gas, and regulate a total amount of the lean liquid and the rich liquid in the system based on the liquid level.