Mixed-Particle Solid Amine Carbon Capture With Dual Desorption
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Solution Overview
Problem
Existing carbon capture systems face inefficiencies due to the need for separate desorption equipment for solid amine materials with different particle sizes, leading to low work efficiency and limited processing capacity, especially in fluidized bed equipment.
Innovation Solution
A carbon capture system with an adsorption assembly, separation unit, first desorption unit, fine powder recovery assembly, and second desorption unit, utilizing a combination of bubbling and vacuum desorption methods to handle solid amine materials with mixed particle sizes, including an air separation and sorting unit to recover fine powders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If solid amine particles are discharged and screened to separate different particle sizes, then different desorption equipment can be used for each particle size, but work efficiency decreases due to multiple processing steps
Solution Approach 1:
The fluidized bed desorption equipment is designed to handle solid amine particles of all particle sizes (from fine powder to granular material) in a single system, eliminating the need for separate screening and multiple desorption equipment. The fluidized bed configuration allows uniform contact and desorption performance across different particle sizes, making the equipment universally applicable to mixed particle size distributions.
2Productivity
If powdered solid amine material is used in fluidized bed equipment, then reaction efficiency with flue gas increases, but material wear increases limiting capture scale
Solution Approach 1:
The system changes the operational parameters of the fluidized bed, specifically controlling the fluidization velocity and gas flow distribution, to optimize the balance between reaction efficiency and material wear. By adjusting these parameters, the system maintains high contact between powdered amine and flue gas while reducing excessive particle collision and wear, enabling larger scale operation.
3Ease of manufacture
If solid amine granular material with particle size exceeding 3 mm is used, then fixed bed equipment can be used, but contact area with gas decreases
Solution Approach 1:
The system uses fluidized bed technology, which employs gas flow (pneumatics) to suspend and fluidize the solid amine particles. This creates intense mixing and contact between the solid particles and gas phase, dramatically increasing the effective contact area compared to fixed bed configurations, while maintaining equipment simplicity.
4Reliability
If vacuum desorption is used for all particle sizes, then high-purity CO2 can be collected, but energy consumption increases
Solution Approach 1:
The system applies different desorption conditions to different particle sizes within the same fluidized bed system. Fine particles receive more intensive treatment to ensure complete desorption and high purity CO2 collection, while larger particles are treated with appropriate gas flow rates. This localized optimization of desorption intensity for different particle sizes maintains CO2 purity while minimizing 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 system achieves high efficiency and large-scale carbon capture by effectively screening and recycling solid amine materials with various particle sizes, optimizing energy consumption and processing capacity.
Implementation Method 1
a solid amine adsorbent is used to modify an amino group of a porous material, so that a larger specific surface area of the porous material can improve the uniformity of amino group dispersion and increase a contact area between the amino group and gas
Implementation Method 2
a first desorption unit, provided at a solid output end of the separation unit, and configured to desorb the separated solid amine by bubbling
Implementation Method 3
a second desorption unit, connected to an output end of the fine powder recovery assembly, and configured to input the recovered solid amine particles into the second desorption unit for vacuum desorption
Implementation Method 4
an air separation and sorting unit, connected to a gas outlet end of the auxiliary separation unit, and configured to air-separate solid amine particles escaping from the gas outlet end of the auxiliary separation unit
Data Source
AI summary
The present disclosure provides a carbon capture system applicable to solid amine materials with various particle sizes, including: an adsorption assembly, a separation unit, a first desorption unit, a fine powder recovery assembly, a second desorption unit and a fine powder silo assembly; wherein the adsorption assembly adsorbs carbon dioxide in external flue gas/air by solid amine with mixed particle sizes; the separation unit separates the solid amine with the mixed particle sizes; the first desorption unit desorbs the separated solid amine by bubbling; the fine powder recovery assembly screens solid amine escaping from the gas outlet end of the first desorption unit; and the second desorption unit inputs the recovered solid amine particles into the second desorption unit for vacuum desorption. The present disclosure can achieve particle size screening and match different desorption processes based on the solid amine particle size.