UV Irradiation Control via Fluorometer Spectral Feedback
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Solution Overview
Problem
Conventional ultraviolet disinfection systems in water treatment facilities face challenges in maintaining an optimal irradiation level as water properties or conditions change, leading to unreliable water safety and excessive energy consumption.
Innovation Solution
An ultraviolet irradiation system equipped with a fluorometer that continuously measures excitation and fluorescence spectrum peak wavelengths, allowing for real-time adjustment of the ultraviolet irradiation level using a proportional, step, or predetermined function, ensuring optimal disinfection while reducing energy usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ultraviolet irradiation is applied at a constant intensity to disinfect water, then disinfection function is provided, but the irradiation level becomes excessive or insufficient when water properties change, impairing reliability of water safety
Solution Approach 1:
The system employs a fluorometer to continuously measure water quality parameters (excitation spectrum peak wavelength and fluorescence spectrum peak wavelength) and feeds this information back to the control device, which automatically adjusts the ultraviolet irradiation intensity to maintain optimal disinfection levels despite changes in water properties
Solution Approach 2:
The ultraviolet irradiation intensity is transformed from a static constant value to a dynamic variable that automatically adapts to changing water conditions through real-time measurement and control based on fluorescence characteristics
2Reliability
If ultraviolet irradiation level is increased to ensure water safety, then disinfection reliability is improved, but unnecessary energy consumption increases
Solution Approach 1:
The system changes the irradiation parameter (intensity) based on measured water quality parameters, adjusting the ultraviolet dosage to match actual disinfection needs rather than applying a fixed high intensity, thereby eliminating unnecessary energy consumption while maintaining safety
Solution Approach 2:
The system performs self-adjustment by automatically measuring water quality and controlling irradiation levels without external intervention, optimizing energy usage based on real-time 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
This approach ensures reliable water safety and energy savings by adjusting ultraviolet irradiation levels based on water quality, optimizing disinfection efficacy and reducing unnecessary energy consumption.
Implementation Method 1
a fluorometer continuously measuring an excitation spectrum peak wavelength and/or a fluorescence spectrum peak wavelength
Data Source
AI summary
A part of pre-treated water flowing into an ultraviolet irradiation tank is guided to a fluorometer. The fluorometer scans an excitation spectrum peak wavelength of the pre-treated water at a fluorescence wavelength fixed to 425 nm to obtain an excitation spectrum, and continuously measures an excitation peak wavelength thereof. Based on the analysis result obtained by the fluorometer, an ultraviolet irradiation device calculates an ultraviolet irradiation level target value for optimizing an ultraviolet irradiation level, and thus controls the irradiation level of ultraviolet rays emitted therefrom.