Degassing Basin Floating Separation Oxygen Removal
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Solution Overview
Problem
Existing CO2 recovery technologies face issues with re-trapping of air bubbles due to swirling flows in liquid cyclones, which hinders effective degassing of oxygen from rich solutions in CO2 absorbers.
Innovation Solution
A CO2 recovery device and method incorporating a degassing basin with a retaining section for floating separation of oxygen from rich solutions, a partition wall for gravity-driven separation, and optional features like a degassing tower for further degassing under decompressed conditions and a heat exchange unit to enhance degassing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a liquid cyclone is used to remove air bubbles from the absorbent, then degassing of oxygen can be performed, but re-trapping of air bubbles occurs due to swirling flow
Solution Approach 1:
The invention extracts and removes the harmful swirling flow from the degassing system by replacing the liquid cyclone with a degassing basin that uses gentle floating separation. This eliminates the re-trapping mechanism while maintaining effective oxygen removal from the rich solution.
Solution Approach 2:
The invention introduces a degassing basin as an intermediary device between the CO2 absorber and absorbent regenerator. This mediator uses floating separation technology to remove air bubbles without creating swirling flows, thus preventing re-trapping while achieving reliable degassing.
2Productivity
If counterflow contact is used between CO2-containing gas and absorbent, then CO2 absorption efficiency is improved, but air bubbles become trapped in the absorbent
Solution Approach 1:
The invention applies preliminary action by removing air bubbles from the rich solution before it enters the absorbent regenerator. The degassing basin performs floating separation to eliminate trapped air bubbles in advance, preventing them from interfering with the regenerator operation and ensuring high-purity CO2 recovery.
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 solution reliably removes air bubbles and reduces oxygen concentration in the CO2 gas recovered, preventing re-trapping and improving the overall efficiency of CO2 recovery.
Implementation Method 1
the degassing basin includes a retaining section configured to remove oxygen in the rich solution
Implementation Method 2
a partition wall that allows the rich solution, from which oxygen is removed in the retaining section, to fall along a wall surface
Implementation Method 3
a degassing tower that is provided on a downstream side of the degassing basin, and further degasses the rich solution, from which oxygen is removed in the retaining section, in a decompressed state
Implementation Method 4
a heat exchange unit that is provided on an upstream side of the degassing basin, and heats the rich solution
Data Source
AI summary
CO2 absorber includes a CO2 absorbing section in which a CO2-containing flue gas and a CO2 absorbent are brought into contact with each other to remove CO2, and an aqueous cleaning section in which a decarbonated flue gas and rinsing water are brought into contact with each other to remove an accompanying substance. A lean solution is re-used in the absorber. The CO2 recovery device includes a degassing basin which is interposed in a rich solution supply line that supplies the rich solution from the CO2 absorber to the absorbent regenerator, and which includes a retaining section configured to remove oxygen in the rich solution.