Adsorbent Saturation Detection by Filtration Pressure Rise
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Solution Overview
Problem
Existing methods for determining the saturation time of adsorbents and estimating the DOC content in a medium to be filtered are complex, time-consuming, and not suitable for real-time monitoring, leading to inefficiencies in water filtration processes due to organic fouling.
Innovation Solution
A method to determine the saturation time of an adsorbent by measuring the filtration pressure rise rate and identifying the saturation point, allowing for real-time estimation of the DOC content using a calibration constant, thereby optimizing adsorbent use and minimizing organic fouling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional measurement methods (combustion, UV persulfate) are used to determine DOC content, then measurement precision is improved, but device complexity and time consumption increase significantly
Solution Approach 1:
The patent replaces complex chemical measurement systems (combustion analysis, UV persulfate oxidation) with a simpler physical measurement approach based on filtration pressure monitoring. Instead of using sophisticated chemical detectors and multi-step reactions, the system uses pressure sensors to detect saturation points, substituting complex chemical analysis with a more straightforward physical measurement process.
Solution Approach 2:
The patent extracts the essential information needed for DOC content determination from the filtration process itself by monitoring pressure changes. Rather than requiring separate complex measurement procedures, the system extracts DOC saturation data directly from the filtration pressure rise rate, eliminating the need for separate combustion or chemical analysis steps.
2Measurement precision
If conventional measurement methods are used to determine DOC content, then measurement precision is improved, but time consumption increases
Solution Approach 1:
The patent performs preliminary filtration action to establish a baseline pressure reading before DOC saturation occurs. By monitoring the filtration process from the start and identifying the inflection point where pressure rise rate changes, the system determines DOC content without waiting for lengthy combustion or chemical reactions to complete.
Solution Approach 2:
The patent substitutes time-consuming chemical measurement processes with real-time physical pressure monitoring during filtration. The combustion method requiring hours and the UV persulfate method requiring multiple steps are replaced by continuous pressure measurement that provides immediate saturation data.
3Ease of operation
If adsorbent saturation is not monitored in real-time, then operational simplicity is maintained, but filter performance deteriorates due to organic fouling
Solution Approach 1:
The patent implements feedback control by continuously monitoring filtration pressure and comparing it against baseline values. When the pressure rise rate indicates adsorbent saturation, the system provides feedback to trigger regeneration or replacement actions, ensuring filter performance is maintained without requiring complex real-time DOC measurement systems.
Solution Approach 2:
The filtration system performs self-diagnosis through pressure monitoring, automatically detecting when adsorbent saturation occurs and triggering appropriate responses. This self-service approach maintains filter performance without requiring external complex measurement systems or manual intervention for DOC content determination.
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
Enables efficient and practical determination of adsorbent saturation time and DOC content during ongoing filtration, reducing operational complexity and enhancing filter performance by minimizing organic fouling.
Implementation Method 1
the adsorbent forms a layer with an adsorbent mass on the outer filter surface and is suitable for adsorbing dissolved organic carbon from the medium to be filtered
Implementation Method 2
the pump is suitable for pumping the medium to be filtered through the filter with a pump flow rate
Implementation Method 3
the pressure gauge is suitable for determining the filtration pressure (measured against ambient pressure)
Implementation Method 4
a filter coated with the adsorbent, wherein the filter has an outer filter surface and an inner filter surface, a medium to be filtered containing DOC is present on the outer filter surface, and the filtrate can be discharged via the inner filter surface
Data Source
Figure 1a~1b
Figure 2
Figure 3
AI summary
The present invention relates to a method of determining the saturation time of adsorbent, comprising the following steps: • A) providing a filter (5) coated with the adsorbent, wherein a medium with a DOC content to be filtered is on the outside of the filter and the adsorbent forms a layer with a mass of adsorbent on the outside of the filter and is capable of adsorbing dissolved organic carbon from the medium to be filtered, • B) providing a pump (3) and a manometer (4) disposed between the pump (3) and the filter (5), where the manometer (4) is set up to determine the filtration pressure (p), • C) commencing the pumping of the medium to be filtered through the filter (5), • D) detecting the progression of the filtration pressure (p) against time and deriving the rate at which the filtration pressure rises as the quotient of rise in filtration pressure per unit time, and • E) identifying the saturation point (A, B, C) of the adsorbent as the juncture of a significant change in the rate at which the filtration pressure rises and determining a corresponding saturation time as the duration from commencing the pumping to the saturation point.