Conductivity Probe for Aggressive Media
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Solution Overview
Problem
Current measuring devices are inadequate for reliably determining the electrical conductivity of aggressive, viscous reaction mixtures under high pressure and temperature conditions, leading to unnecessary inerting measures and increased costs in industrial chemical processes, especially when handling non-conductive, flammable liquids.
Innovation Solution
A device comprising a metallic probe with a flange connection and insulation, which measures the electrical conductivity and potential of a liquid medium within a container, allowing for continuous monitoring and optimizing flow rates while ensuring safety by limiting potential discharge risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If comprehensive inerting measures are implemented to eliminate ignitable atmosphere, then explosion safety is improved, but equipment complexity and operating costs increase significantly
Solution Approach 1:
The patent replaces complex mechanical inerting systems with a simple electrical measurement system. By measuring electrical conductivity to assess explosion risk, the system substitutes elaborate safety infrastructure with a minimal sensor-based approach, eliminating the need for comprehensive inerting equipment while maintaining safety through informed risk assessment
Solution Approach 2:
The patent changes the approach from controlling atmospheric composition (inerting) to measuring electrical parameters (conductivity). By monitoring electrical conductivity as a proxy for explosion risk, the system transforms the safety approach from preventive containment to measurement-based assessment, reducing equipment complexity while maintaining reliability
2Reliability
If flow rate is limited to reduce electrostatic charge buildup, then explosion safety is improved, but process efficiency and production output decrease
Solution Approach 1:
The patent implements a feedback mechanism where electrical conductivity measurements provide real-time information about electrostatic charge conditions. This feedback enables dynamic optimization of flow rates - allowing higher rates when conductivity indicates low charge buildup risk, and reducing rates only when measurements show dangerous charge accumulation, thus maintaining safety while maximizing productivity
Solution Approach 2:
The patent transitions from static flow rate limitations to dynamic flow optimization based on measured conditions. By continuously monitoring electrical conductivity and adjusting flow rates accordingly, the system replaces fixed restrictive measures with adaptive control, improving both safety and efficiency simultaneously
3Reliability
If measuring probes are designed for robustness to withstand harsh conditions, then measurement reliability is improved, but the probes become incompatible with aggressive viscous media containing solid particles
Solution Approach 1:
The patent employs composite material construction for the measuring probe, combining materials with complementary properties. The probe uses corrosion-resistant materials for chemical compatibility, wear-resistant materials for handling solid particles, and electrically conductive materials for accurate measurement. This composite approach enables the probe to withstand harsh conditions while maintaining measurement reliability and compatibility with aggressive viscous media
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 reliable measurement of electrical conductivity and potential in aggressive media, reducing inerting costs and optimizing process efficiency by identifying processes that do not require excessive inerting, thus enhancing system safety with specific measurement-based assessments.
Implementation Method 1
the measurement of either the electrical potential between the probe and the container wall or the electrical conductivity of the medium
Implementation Method 2
the flange having at least one insulating layer that electrically isolates the probe from the container wall
Implementation Method 3
the container has at least one metallic container wall which is in contact with the medium when it is held
Data Source
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AI summary
The invention relates to a device for measuring the electrical conductivity and/or electrical potential of a liquid medium, as well as corresponding measurement methods. The object of the invention is to reduce the costs of inerting a chemical production plant in which flammable, aggressive, electrically non-conductive or only slightly conductive, (viscous) liquid media are handled under harsh conditions. This objective is achieved with a device comprising a container, a probe, and a measuring instrument. The container holds the liquid medium. The probe extends through the container wall into the container and makes contact with the medium. The probe is connected to the container wall via a flange, the flange having at least one insulating layer that electrically isolates the probe from the container wall and seals the flange against the passage of the medium.The measuring device allows either the electrical potential between the probe and the container wall or the electrical conductivity of the medium to be measured.