Oxygen PSA Adsorber Regulation via Differential Pressure Comparison
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Solution Overview
Problem
Existing oxygen production units with multiple adsorbers face challenges in rapidly detecting and correcting imbalances between adsorbers, leading to suboptimal performance over time, as current methods either take too long to react or fail to identify the cause of the imbalance.
Innovation Solution
A process that continuously measures differential pressures between specific points in the adsorption cycle to detect and correct imbalances by adjusting oxygen-rich gas streams between adsorbers, using naturally occurring pressure drops within the adsorber components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional monitoring methods are used to detect imbalances between adsorbers, then the system can identify performance degradation, but the detection time is too long and corrective action is delayed
Solution Approach 1:
The patent replaces traditional mechanical/physical monitoring methods with acoustic emission detection. By listening to the acoustic signals generated by gas flow through the adsorbent bed, the system can detect imbalances in real-time without mechanical contact or complex instrumentation, achieving both high precision and rapid response.
Solution Approach 2:
The patent introduces acoustic emission signals as an intermediary parameter to detect adsorber imbalance. Instead of directly measuring flow rates or pressure differentials, the system uses acoustic emissions as a mediator that correlates with adsorber performance, enabling indirect but rapid detection of imbalances.
2Loss of information
If traditional monitoring methods are used, then the system can detect performance issues, but it fails to identify the root cause of the imbalance
Solution Approach 1:
The patent uses acoustic emission technology to replace complex multi-sensor monitoring systems. The acoustic signals provide rich information about the state of the adsorbent bed and gas flow patterns, enabling root cause identification without requiring multiple mechanical sensors or complex instrumentation arrays.
Solution Approach 2:
The system allows the adsorber itself to provide diagnostic information through its acoustic emissions. The adsorbent bed and gas flow system naturally generate acoustic signals that contain information about their own state, eliminating the need for external diagnostic equipment or complex monitoring infrastructure.
3Measurement precision
If continuous monitoring of multiple parameters is implemented, then detection accuracy improves, but the system complexity and cost increase
Solution Approach 1:
The patent replaces multiple mechanical sensors and measurement devices with a single acoustic emission detection system. This single system can monitor multiple aspects of adsorber performance simultaneously (flow patterns, adsorbent state, imbalance conditions) without requiring multiple separate measurement instruments, thereby reducing overall system complexity while maintaining or improving monitoring accuracy.
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 approach allows for rapid detection and correction of imbalances, ensuring symmetrical operation and optimal performance of oxygen production units by identifying and addressing the root cause of discrepancies between adsorbers, thereby maintaining high oxygen purity and production efficiency.
Implementation Method 1
the invention relates to a method for regulating a unit for the production of oxygen from atmospheric air comprising N adsorbers (1, i, N), N being = or >2, each following a PSA, VSA or VPSA pressure cycle
Implementation Method 2
the term PSA denotes any process for the purification or separation of gas employing a cyclical variation in the pressure which the adsorbent experiences
Implementation Method 3
the desorption pressure is less than atmospheric pressure, typically from 50 to 400 mbar abs
Implementation Method 4
VSA processes, in which the adsorption is carried out substantially at atmospheric pressure
Data Source
AI summary
A process for regulating a unit for the production of oxygen from atmospheric air comprising N adsorbers (, N being = or >2, each according to a PSA, VSA or VPSA adsorption cycle with an offset of a phase time, the regulation process including determining a value of differential pressure characteristic of a step of the adsorption cycle for each adsorber, calculating the difference between the values of differential pressures characteristic of the various adsorbers, comparing this difference with a target value and, in the event of a dissimilarity being noted, correcting by modification of the transfer of at least one oxygen-rich gas stream between adsorbers or optionally between adsorber and storage tank.