Waterborne Substance Concentration Monitoring via Gas Circulatory State Modeling
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Solution Overview
Problem
Existing methods for monitoring waterborne substances in aqueous media, such as TOC and TNb, face challenges in accuracy due to time-dependent gas circulatory system states and contamination, leading to inefficiencies in measurement and increased time for control measurements.
Innovation Solution
A method that introduces a defined amount of aqueous medium into a gas circulatory system, models the contribution of the system state to the reaction product concentration, and corrects measurements using a carrier gas purge to establish a clean state, allowing for reduced reference measurements and improved accuracy by modeling contamination effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If continuous monitoring method is used with gas circulatory system, then measurement smoothing and uniform signal are achieved, but contamination of the gas circulatory system corrupts measurements and requires frequent control measurements
Solution Approach 1:
The system performs preliminary actions by continuously modeling the expected reaction product concentration based on the time-dependent state of the gas circulatory system before actual measurement. This allows the system to predict and compensate for contamination effects in advance, separating the contamination signal from the actual measurement signal.
Solution Approach 2:
The system implements feedback by continuously comparing the actual measured signal with the modeled expected signal from the time-dependent state model. The difference between these signals indicates contamination levels, which are then used to correct subsequent measurements, creating a closed-loop system that automatically compensates for contamination.
2Reliability
If batch method is used with control measurements, then contamination can be recognized and cleaned, but too much measurement time is used for control measurements
Solution Approach 1:
The system maintains continuous monitoring operation without interruption by performing contamination detection and correction in real-time through the time-dependent state model. Instead of stopping for batch control measurements, the system continuously models the gas circulatory system state and compensates for contamination on-the-fly, maintaining uninterrupted useful measurement action.
Solution Approach 2:
The system performs self-service by automatically detecting and compensating for contamination through its own time-dependent state model without requiring external control measurements or manual intervention. The model serves the system itself by providing continuous contamination correction, eliminating the need for separate quality control operations.
3Productivity
If continuous monitoring is performed without contamination correction, then operational time is reduced, but measurement accuracy deteriorates due to uncorrected contamination
Solution Approach 1:
The system replaces physical mechanical cleaning operations with a mathematical modeling approach. Instead of physically purging the gas circulatory system to remove contamination, the system substitutes a time-dependent state model that mathematically describes and compensates for contamination effects, transforming a mechanical problem into a computational solution.
Solution Approach 2:
The system changes parameters by modeling the time-dependent state of the gas circulatory system, including temperature, flow rate, and residence time variations. By tracking how these parameters evolve over time, the system calculates the expected reaction product concentration and uses this to correct measurements, transforming static correction into dynamic parameter-based compensation.
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 enhances measurement accuracy by minimizing contamination impacts and reducing the need for frequent control measurements, enabling more efficient monitoring of waterborne substances with improved data integrity and reduced operational time.
Implementation Method 1
burning the water borne substance in the high temperature reaction chamber to a reaction product
Implementation Method 2
evaporating the aqueous medium in the high temperature reaction chamber
Implementation Method 3
the resulting carbon dioxide concentration in the gas circulatory system is ascertained photometrically with an infrared absorption measurement
Data Source
AI summary
A method for monitoring the concentration of water borne substances in an aqueous medium, by introducing a defined amount of the aqueous medium into a gas circulatory system of an analytical apparatus which extends through a high temperature reaction chamber and a measuring chamber. The introducing of the aqueous medium occurs upstream of the high temperature reaction chamber or into it. The aqueous medium is evaporated in the high temperature reaction chamber, the water borne substance with at least one reaction partner in the high temperature reaction chamber reacts to a gaseous reaction product, and a current value of a measured variable is registered, which is a function of the concentration of the chemical species of the reaction product in the gas circulatory system. The concentration of the chemical species of the reaction product in the gas circulatory system depends, on the one hand, on a time-dependent state of the gas circulatory system and, on the other hand, on the concentration of the substance in the aqueous medium; ascertaining the concentration of the substance in the aqueous medium by applying the current value of the measured variable, wherein, in the ascertaining of the concentration of the substance in the aqueous medium, the contribution to the concentration of the chemical species of the reaction product in the gas circulatory system by the state of the gas circulatory system is ascertained on the basis of a model of the state, and a correction of the concentration of the chemical species of the reaction product in the gas circulatory system occurs on the basis of this contribution.