Acid Gas Capture Return Flow for Purity and Adsorption Efficiency
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Solution Overview
Problem
Existing acid gas capture systems face a trade-off between purity and capture efficiency, with discharge steps potentially desorbing acid gas unintentionally, leading to reduced capture efficiency and purity issues.
Innovation Solution
An acid gas capture system and method that includes an acid gas adsorption part, a housing part, and a return part, with a return flow passage to reintroduce desorbed acid gas back into the system, allowing for high-purity capture with improved efficiency through controlled discharge and desorption steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a discharge step is performed to discharge the atmosphere remaining in the acid gas capture device after the adsorption step and before the desorption step, then the purity of the captured acid gas is improved, but part of the acid gas may be desorbed unintentionally during the discharge step, reducing the capture efficiency
Solution Approach 1:
The discharge step is divided into multiple stages: a first discharge step that discharges atmosphere from the upstream side of the acid gas adsorption part, and a second discharge step that discharges atmosphere from the downstream side. This segmentation allows controlled discharge without creating large pressure differences that would cause unintentional desorption, thereby maintaining both purity and capture efficiency.
Solution Approach 2:
The first discharge step is performed before the second discharge step to preliminarily remove atmosphere from the upstream side, reducing the pressure difference across the adsorption part before the second discharge step. This preliminary action prevents large pressure gradients that could cause acid gas to desorb unintentionally during the discharge process.
2Manufacturing precision
If the discharge step is performed to improve purity, then atmosphere mixing with captured acid gas is reduced, but the capture efficiency decreases due to unintentional desorption
Solution Approach 1:
The discharge operation is segmented into two sequential steps: first discharging from the upstream side, then discharging from the downstream side. This segmentation ensures that atmosphere is removed gradually without creating pressure conditions that would cause acid gas to desorb, thus preserving both purity and the quantity of acid gas captured.
Solution Approach 2:
The first discharge step acts as a preliminary action that removes atmosphere from the upstream side before the second discharge step. This preliminary discharge reduces the pressure gradient across the adsorption part, preventing unintentional desorption and ensuring that the maximum amount of acid gas remains captured while still achieving high purity.
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 effectively captures high-purity acid gas with enhanced capture efficiency by reintroducing desorbed gas back into the system, preventing unintentional discharge and optimizing the balance between purity and efficiency.
Implementation Method 1
an adsorption step of causing an acid gas adsorption material to adsorb an acid gas to separate the acid gas from the atmosphere
Implementation Method 2
a desorption step of heating a gas adsorption part to a predetermined desorption temperature to cause the acid gas adsorption material to desorb the acid gas
Data Source
AI summary
An acid gas capture system includes: an acid gas adsorption part including an acid gas adsorption material capable of adsorbing an acid gas contained in a gas to be treated and capable of desorbing the adsorbed acid gas; a housing part, which includes a first flow passage to which the gas to be treated is supplied, and which houses the acid gas adsorption part so that the acid gas adsorption part is positioned in the first flow passage; and a return part including a return flow passage through which at least part of the acid gas desorbed from the acid gas adsorption material and discharged from the acid gas adsorption part is allowed to be returned to the first flow passage of the housing part.