ORP Probe for Hot Water Corrosion Control
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Solution Overview
Problem
Conventional methods for monitoring and controlling oxidation-reduction potential (ORP) and pH in hot water systems are inadequate, as they typically require cooling samples, provide only single-point measurements, and are not capable of real-time monitoring at operating temperatures and pressures, leading to undetected REDOX Stress events and subsequent corrosion issues.
Innovation Solution
A system comprising an oxidation-reduction potential probe and a controller unit that measures ORP in real-time at operating temperatures and pressures, activating water treatment chemicals to maintain a predetermined pH range and control corrosion in hot water systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional monitoring methods are used to measure ORP and pH, then sample conditioning and cooling are required, but real-time monitoring at operating temperature and pressure cannot be achieved
Solution Approach 1:
The patent applies parameter changes by modifying the operating conditions of the measurement system to match the process conditions. The ORP electrode and pH sensor are designed to operate directly at high temperatures (up to 310°C) and pressures (up to 10 MPa) of the boiler water, eliminating the need for sample cooling and conditioning. This allows real-time measurement of ORP and pH parameters under actual operating conditions, providing immediate detection of REDOX Stress events without time loss from sample preparation.
2Device complexity
If conventional single-point measurements are used, then equipment complexity is reduced, but corrosion control effectiveness deteriorates due to undetected REDOX Stress events
Solution Approach 1:
The patent implements feedback control by continuously monitoring ORP and pH parameters and using this information to automatically adjust chemical feed rates. The system measures ORP and pH in real-time, compares these measurements to target values, and adjusts the feed of oxygen scavengers and pH control chemicals accordingly. This closed-loop feedback mechanism ensures reliable corrosion prevention by responding to REDOX Stress events as they occur, rather than relying on fixed schedules or single-point measurements.
Solution Approach 2:
The system applies self-service by using the measured ORP and pH values directly to control the chemical feed system without requiring external intervention or complex additional equipment. The controller automatically adjusts chemical dosing based on the sensor readings, enabling the system to self-regulate and maintain optimal corrosion protection conditions.
3Productivity
If real-time ORP measurement at operating temperature is implemented, then REDOX Stress events are detected promptly, but device complexity and measurement difficulty increase
Solution Approach 1:
The patent applies copying by using a simplified reference electrode design that replicates the essential measurement function without requiring complex high-temperature components. The external reference electrode system uses a stable reference potential that can be maintained at ambient conditions while measuring the ORP of hot boiler water through a temperature-compensated interface. This copying approach allows accurate ORP measurement at high temperatures by separating the measurement function from the extreme operating conditions.
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 accurate, real-time monitoring and control of ORP and pH, preventing corrosion and improving the efficiency and reducing operating costs of hot water systems by promptly addressing REDOX Stress events.
Implementation Method 1
measuring a reduction potential of hot water substantially in real time... capable of measuring a reduction potential of boiler water substantially in real time
Implementation Method 2
activating at least one water treatment chemical in response to the measured reduction potential so as to maintain a pH within a predetermined range
Data Source
AI summary
Disclosed are systems and methods for monitoring and controlling a real-time oxidation-reduction potential in a hot water system to inhibit corrosion in the hot water system. The method includes defining one or more operational protective zones in the hot water system. One or more of the operational protective zones includes an oxidation-reduction potential probe that is operable to measure a real-time oxidation-reduction potential in the hot water system at operating temperature and pressure. The probe transmits the measured real-time potential to the controller, which assesses and interprets the transmitted potential to determine whether it conforms to an oxidation-reduction potential setting. If the measured potential does not conform the oxidation-reduction potential setting, the controller is operable to feed or remove one or more active chemical species into or from the hot water system and further operable to change at least one system parameter.