CO2 Separation Device Using Compression Heat Regeneration
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Solution Overview
Problem
Conventional separation methods for desired components from mixed gases require high energy for regeneration and have low absorption efficiency, leading to increased device size and energy consumption.
Innovation Solution
A separation method and device that compresses the starting material gas to generate compression heat, which is used to heat the absorption liquid in the regeneration process, improving absorption efficiency and reducing energy consumption by eliminating the need for additional heat sources and minimizing absorption liquid volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the absorption liquid is heated in the regeneration tower to release carbon dioxide, then carbon dioxide is separated from the absorption liquid, but a large amount of energy is consumed
Solution Approach 1:
The patent combines the compression process and regeneration process by using the compressed starting material gas to provide heat for regenerating the absorption liquid. The compression heat that would normally be wasted is now utilized to release carbon dioxide from the absorption liquid, merging two separate processes into one integrated system.
Solution Approach 2:
The patent converts the harmful effect of compression heat (which increases temperature and can cause unwanted side reactions) into a beneficial effect by using this heat to drive the regeneration process. The heat that would normally be considered waste or problematic is now the driving force for releasing carbon dioxide from the absorption liquid.
2Quantity of substance
If the liquid volume of the absorption liquid is increased to secure sufficient absorption amount, then absorption capacity is improved, but the size of the separation device increases
Solution Approach 1:
The patent changes the pressure parameter of the starting material gas by compressing it before absorption. This pressure increase enhances the driving force for mass transfer, allowing more carbon dioxide to be absorbed per unit volume of absorption liquid, thereby improving absorption capacity without increasing device size.
Solution Approach 2:
The patent performs compression of the starting material gas before the absorption process to pre-condition the gas with higher pressure. This preliminary action increases the concentration gradient and mass transfer rate during absorption, enabling more efficient use of the absorption liquid volume.
3Use of energy by stationary object
If the starting material gas is compressed to generate compression heat, then energy for regeneration is provided, but compression energy is required
Solution Approach 1:
The system uses the starting material gas itself to provide the energy needed for regeneration through compression. The compression of the starting material gas generates the heat required for the regeneration process, making the system self-sufficient for its energy needs without requiring external heat sources or additional energy input.
Solution Approach 2:
The starting material gas serves multiple functions: it is the feedstock for carbon dioxide separation, the medium for generating compression heat, and the heating source for regeneration. This multi-functionality eliminates the need for separate energy supply systems and reduces overall energy consumption.
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 method enhances absorption efficiency and reduces energy consumption by using compression heat to regenerate the absorption liquid, preventing the need for larger device sizes and minimizing sensible heat requirements.
Implementation Method 1
a compression process for compressing the starting material gas to generate compression heat in the starting material gas
Implementation Method 2
an absorption process for absorbing the desired component in the starting material gas into the absorption liquid by bringing the starting material gas and the absorption liquid into contact with each other
Implementation Method 3
a regeneration process for releasing the desired component from the absorption liquid to regenerate the absorption liquid by heating the absorption liquid having absorbed the desired component
Implementation Method 4
In the regeneration process, the absorption liquid is heated by supplying the starting material gas compressed in the compression process to the regeneration device and heat exchanging the starting material gas with the absorption liquid
Data Source
AI summary
A separation method including: an absorption process absorbing a desired component in a starting material gas into an absorption liquid by bringing the starting material gas and the absorption liquid into contact with each other inside an absorption unit; a regeneration process releasing the desired component from the absorption liquid and regenerating the absorption liquid by heating the absorption liquid, which absorbed the desired component in the absorption process, in a regeneration unit; a post-regeneration separation process separating the mixed fluid, which is the gas of the desired component released in the regeneration process and the regenerated absorption liquid, into the desired component gas and the absorption liquid; and a compression process compressing the starting material gas prior to the absorption process and the regeneration process.