Conductivity Sensor for H2O2 Detection in PAA Cleaning Systems
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Solution Overview
Problem
In cold aseptic filling systems using peracetic acid (PAA)-based cleaning solutions, the reuse of solutions leads to a drop in PAA concentration and an increase in hydrogen peroxide (H2O2) levels, causing undesirable corrosion and non-compliance with food processing regulations due to high H2O2 levels.
Innovation Solution
A conductivity sensor system that measures the electrical conductivity of the PAA-based cleaning solution and compares it to a threshold value to detect H2O2 levels, generating an alarm or initiating a partial or total exchange of the cleaning solution when levels exceed a setpoint, thereby maintaining optimal concentrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If PAA-based cleaning solution is reclaimed and reused to maintain PAA concentration, then cleaning solution is recovered and reused, but H2O2 levels increase causing corrosion and regulatory non-compliance
Solution Approach 1:
The patent implements a feedback control system using a conductivity sensor to continuously monitor the cleaning solution and provide real-time data to a controller. The controller compares conductivity readings to threshold values and automatically triggers alerts or solution exchange when H2O2 levels exceed safe limits, creating a closed-loop system that prevents corrosion while maximizing solution reuse
Solution Approach 2:
The patent replaces manual titration methods with an automated conductivity-based detection system. The conductivity sensor and controller system automatically monitors H2O2 levels and triggers solution exchange without requiring manual intervention, eliminating the need for robotic or manual titration processes
2Quantity of substance
If fresh PAA-based cleaning solution is added to maintain desired PAA concentration, then PAA concentration is maintained, but H2O2 levels increase beyond safe limits
Solution Approach 1:
The conductivity sensor provides continuous feedback on the chemical composition of the cleaning solution, allowing the controller to monitor the ratio of PAA to H2O2. When H2O2 levels approach unsafe thresholds, the system alerts operators to exchange the solution before excessive H2O2 accumulation occurs, enabling precise control of chemical concentrations
Solution Approach 2:
The patent uses electrical conductivity as a measurable parameter to indirectly track H2O2 concentration changes in the cleaning solution. By monitoring conductivity variations, the system can detect when H2O2 levels are increasing and trigger appropriate responses without directly measuring chemical concentrations
3Measurement precision
If conventional titration methods are used to detect H2O2 levels, then detection is possible, but system complexity and operational difficulty increase
Solution Approach 1:
The patent replaces complex manual or robotic titration systems with a simple conductivity sensor-based detection system. The conductivity sensor provides automated, continuous monitoring of H2O2 levels through electrical conductivity measurements, eliminating the need for manual titration operations and reducing system complexity while maintaining detection capability
Solution Approach 2:
The conductivity sensor system provides self-service monitoring by automatically detecting H2O2 levels and triggering alerts without requiring manual intervention. The system continuously monitors the cleaning solution and autonomously identifies when H2O2 levels exceed thresholds, eliminating the need for ongoing manual titration operations
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
Effectively monitors and controls H2O2 levels, preventing equipment corrosion and regulatory non-compliance by ensuring the PAA-based cleaning solution maintains desired concentrations, thus ensuring safe and compliant operation of cold aseptic filling systems.
Implementation Method 1
a conductivity sensor configured to receive the PAA-based cleaning solution and to provide a signal representative of the electrical conductivity of the PAA-based cleaning solution
Data Source
AI summary
A system for detecting a hydrogen peroxide (H2O2) concentration in a cold aseptic filling system that uses a peracetic acid (PAA)-based cleaning solution is shown and described. The system includes a conductivity sensor configured to receive the PAA-based cleaning solution and to provide a signal representative of the electrical conductivity of the PAA-based cleaning solution. The system further includes a controller configured to receive the signal representative of the electrical conductivity of the PAA-based cleaning solution and to compare the signal to a threshold value associated with a setpoint H2O2 concentration.