Infrared Gas Analyzer Filtration for Catalyst-Free Interference Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing infrared gas analyzers require periodic replacement and maintenance of oxidation catalysts to reduce interference effects of CO, leading to high running costs.
Innovation Solution
Incorporating a gas filter that encloses interference components like CO2 and CO within a single chamber, eliminating the need for a catalyst by reducing interference effects through a stable equilibrium of these components, and using a variable weighting coefficient to correct measurement errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an oxidation catalyst is used to oxidize CO to CO2, then the interference effects of CO on N2O measurement are reduced, but running costs increase due to periodic replacement and maintenance requirements
Solution Approach 1:
The patent extracts the harmful interference components (CO and CO2) from the measurement system by enclosing them in a separate gas filter chamber, eliminating the need for oxidation catalysts while maintaining measurement accuracy
Solution Approach 2:
The patent introduces a gas filter as an intermediary substance containing known concentrations of CO and CO2, which acts as a reference to compensate for interference effects without requiring catalytic conversion
2Measurement precision
If an oxidation catalyst is used to reduce interference effects, then measurement accuracy improves, but device complexity increases due to additional maintenance requirements
Solution Approach 1:
The patent removes the catalyst component entirely from the system and replaces it with a gas filter containing enclosed interference gases, simplifying the device structure and eliminating maintenance complexity
Solution Approach 2:
The gas filter performs the interference compensation function automatically through its enclosed reference gases, eliminating the need for external catalyst maintenance and operational intervention
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
Reduces running costs by eliminating the need for catalyst replacement and improves measurement accuracy by correcting for interference using a dynamic weighting coefficient.
Implementation Method 1
non-dispersive infrared absorption devices (NDIR analyzers) are used to measure the concentration of measurement components in exhaust gas
Implementation Method 2
an infrared light source that irradiates the measurement cell with infrared light
Implementation Method 3
an infrared light detector that detects infrared light that has passed through the measurement cell
Implementation Method 4
the infrared absorption wavelength range of carbon dioxide (CO2) and the infrared absorption wavelength range of carbon monoxide (CO) each overlap the infrared absorption wavelength range of measurement component N2O
Data Source
AI summary
The present invention is one which reduces running costs by eliminating the need for a catalyst, which is a consumable item, and comprises a measurement cell into which sample gas is introduced, an infrared light source that irradiates the measurement cell with infrared light, an infrared light detector that detects infrared light that has passed through the measurement cell, and a gas filter within which a plurality of interference components that interfere with a measurement component in the sample gas are enclosed.