Apparatus for treating liquid to be analyzed
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Solution Overview
Problem
Current industrial methods for analyzing impurities in cryogenic liquids, such as oxygen, face challenges in detecting low concentrations (less than 100 ppb) due to high complexity and operational expertise requirements, and existing techniques either require long analysis times or dilute impurities, making it difficult to accurately measure and control impurity levels for safe operation of cryogenic distillation systems.
Innovation Solution
An apparatus with a cylindrical chamber and an annular chamber that partially vaporizes a known amount of cryogenic liquid, concentrating impurities in the liquid phase, allowing for direct analysis via a conventional analyzer, which measures contaminant concentrations of less than 10 ppm by superheating the vaporized phase to ensure residual liquid contamination is eliminated, enabling precise measurement of impurities without extensive sampling or system interruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex industrial analysis techniques are used to detect low impurity concentrations, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The invention performs preliminary concentration of impurities by partially vaporizing the cryogenic liquid sample before analysis. By vaporizing only a portion of the liquid (controlling the liquid-to-vapor ratio), impurities are concentrated in the remaining liquid phase, enabling conventional analyzers to detect low concentrations without requiring complex specialized equipment.
Solution Approach 2:
The invention changes the concentration parameter of impurities in the liquid phase through controlled partial vaporization. By adjusting the vaporization degree and liquid-to-vapor ratio, the impurity concentration is increased from undetectable levels to measurable levels, allowing standard analyzers to achieve the required measurement precision.
2Measurement precision
If complete vaporization of liquid oxygen is performed to analyze impurities, then measurement precision is improved, but loss of time increases
Solution Approach 1:
Instead of complete vaporization, the invention uses partial vaporization where only a controlled portion of the liquid is vaporized. This partial action is sufficient to concentrate impurities in the remaining liquid while dramatically reducing the time required compared to complete vaporization and condensation cycles.
Solution Approach 2:
The vaporization chamber serves multiple functions: it concentrates impurities through partial vaporization, prepares the sample for analysis, and eliminates the need for separate condensation equipment. This multi-functionality reduces overall analysis time while maintaining measurement precision.
3Measurement precision
If impurity concentration in liquid phase is increased, then measurement precision is improved, but object-generated harmful factors increase
Solution Approach 1:
The invention uses partial vaporization rather than complete vaporization, which concentrates impurities to measurable levels without creating the extreme conditions that would generate significant harmful effects. The controlled degree of vaporization limits the concentration increase to what is necessary for detection while avoiding excessive risk.
Solution Approach 2:
The vaporization chamber acts as an intermediary device that safely concentrates impurities before they reach the analyzer. This intermediate concentration step allows measurement of low-level impurities without requiring the analyzer to handle highly concentrated dangerous mixtures directly.
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 and accurate measurement of impurities in cryogenic liquids, reducing analysis time and operational complexity, while ensuring safe operation by concentrating impurities to detectable levels within the liquid phase, thereby enhancing the safety and efficiency of cryogenic distillation systems.
Implementation Method 1
a heater for heating the tank of the cylindrical chamber
Implementation Method 2
partially vaporizes a known amount of cryogenic liquid, concentrating impurities in the liquid phase
Implementation Method 3
an annular chamber positioned around the cylindrical chamber
Data Source
AI summary
An apparatus for analyzing the content of at least one contaminant in a liquid cryogen comprising a cylindrical enclosure, an annular enclosure arranged around the cylindrical enclosure, means for dividing a flow of liquid cryogen in two, means for delivering a first part of the liquid cryogen to the cylindrical enclosure, means for delivering a second part of the liquid cryogen to the annular enclosure, a pipe connected to the cylindrical enclosure to allow vaporized liquid to pass through, a pipe connected to the annular enclosure to allow vaporized liquid to pass through, a heater for heating the cylindrical enclosure vessel and means for stopping the delivery of liquid cryogen to the cylindrical enclosure.