CO2 Capture Absorption Tower Acid Component Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The accumulation of acid components like nitrogen oxide and sulfur oxide in the absorbing liquid of carbon dioxide separation and capture apparatuses reduces the absorption rate of carbon dioxide, leading to decreased efficiency in carbon dioxide capture from combustion exhaust gases.
Innovation Solution
Incorporating an inlet and outlet concentration meter system to measure acid component concentrations, a supplementary absorbing liquid supply unit to add fresh liquid, and a controller to regulate the supplementary liquid based on measured concentrations, thereby minimizing acid component accumulation in the absorbing liquid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the absorption tower continuously operates to capture carbon dioxide from exhaust gas, then carbon dioxide capture efficiency is improved, but acid components accumulate in the absorbing liquid causing absorption rate to decrease
Solution Approach 1:
The system uses concentration meters to continuously monitor acid component levels in the absorbing liquid and provides feedback to the controller. Based on this feedback, the controller automatically adjusts the supplementary absorbing liquid supply to maintain optimal absorption conditions, resolving the contradiction between continuous operation and absorption efficiency
Solution Approach 2:
The system changes the composition parameter of the absorbing liquid by adding supplementary absorbing liquid when acid component concentration reaches a predetermined level. This parameter change restores the absorption rate without interrupting continuous carbon dioxide capture operations
2Device complexity
If no supplementary absorbing liquid is supplied, then device complexity is reduced, but acid component accumulation causes deterioration of absorbing liquid performance
Solution Approach 1:
The system performs self-service by automatically monitoring its own absorbing liquid quality through concentration meters and adding supplementary absorbing liquid when needed. This self-monitoring and self-correction mechanism maintains performance without requiring complex external intervention systems
Solution Approach 2:
The concentration meters provide continuous feedback on acid component levels, enabling the controller to automatically adjust supplementary liquid supply. This feedback loop maintains absorbing liquid performance with minimal additional device complexity
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 setup effectively decreases the accumulation of acid components, maintaining the absorption rate and efficiency of carbon dioxide capture, preventing the deterioration of the absorbing liquid and ensuring consistent performance.
Implementation Method 1
an absorption tower configured to cause an absorbing liquid to absorb a carbon dioxide gas contained in a process gas
Implementation Method 2
a regeneration tower configured to cause the absorbing liquid from the absorption tower to release the carbon dioxide gas
Implementation Method 3
a heat exchanger, installed between the absorption tower and the regeneration tower, is configured to cause thermal exchange between the rich liquid to be supplied to the regeneration tower from the absorption tower and the lean liquid to be supplied to the absorption tower from the regeneration tower
Data Source
AI summary
A carbon dioxide separation and capture apparatus includes an absorption tower configured to cause an absorbing liquid to absorb a carbon dioxide gas contained in a process gas and a regeneration tower configured to cause the absorbing liquid from the absorption tower to release the carbon dioxide gas. The carbon dioxide separation and capture apparatus further includes an inlet concentration meter configured to measure concentration of an acid component in the process gas supplied to the absorption tower and an outlet concentration meter configured to measure concentration of the acid component in the process gas discharged from the absorption tower. Also included in the carbon dioxide separation and capture apparatus are a supplementary absorbing liquid supply mechanism configured to supply a supplementary absorbing liquid to the main unit and a controller configured to control an amount of the supplementary absorbing liquid supplied to the main unit by the supplementary absorbing liquid supply mechanism based on the concentrations of the acid component measured at the inlet concentration meter and the outlet concentration meter.