Pure Water Apparatus Dissolved Oxygen Control
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Solution Overview
Problem
Existing pure water production apparatuses that use ultraviolet ray radiation to decompose organic materials often leave residual hydrogen peroxide, which can damage downstream equipment, necessitating frequent maintenance or removal processes.
Innovation Solution
A pure water production apparatus that controls the concentration of dissolved oxygen in the water to be treated, ensuring a mass ratio of 1 to 7 with Total Organic Carbon (TOC), allowing for efficient TOC reduction without the use of oxidizing agents like hydrogen peroxide, by using an ultraviolet ray radiation apparatus in conjunction with deoxidization and oxygen supply means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If hydrogen peroxide is added to water to be treated before ultraviolet ray radiation, then TOC decomposition efficiency is improved, but residual hydrogen peroxide damages downstream apparatuses requiring frequent maintenance
Solution Approach 1:
The invention changes the chemical parameter by replacing hydrogen peroxide with dissolved oxygen as the oxidizing agent. By controlling the dissolved oxygen concentration to maintain a mass ratio of 1-7 relative to TOC, the system achieves effective TOC decomposition through ultraviolet radiation without introducing residual harmful substances that would damage downstream equipment
Solution Approach 2:
The invention uses dissolved oxygen, which is naturally present in water and can be easily replenished, replacing hydrogen peroxide. The dissolved oxygen serves its oxidizing function during ultraviolet radiation and then dissipates without leaving harmful residues, effectively acting as a disposable reagent that eliminates maintenance issues
2Productivity
If hydrogen peroxide is added to decompose organic materials, then TOC reduction is improved, but the system complexity increases due to maintenance requirements
Solution Approach 1:
The invention extracts and eliminates the problematic component (hydrogen peroxide addition system) from the treatment process. By relying on controlling dissolved oxygen levels instead of adding external oxidizing agents, the system removes the need for peroxide storage, dosing, and removal infrastructure, thereby simplifying the overall system
Solution Approach 2:
The invention enables the water treatment system to use its own dissolved oxygen content as the oxidizing agent. By controlling the dissolved oxygen concentration to an appropriate ratio relative to TOC, the system performs self-oxidation during ultraviolet radiation without requiring external chemical additions or complex removal mechanisms
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 effectively reduces TOC in water without adding oxidizing agents, simplifying the system and reducing maintenance needs by optimizing the ratio of dissolved oxygen to TOC, thereby enhancing the efficiency of organic material decomposition and minimizing the load on downstream equipment.
Implementation Method 1
an ultraviolet ray radiation apparatus that irradiates water to be treated with ultraviolet rays
Implementation Method 2
Highly oxidative OH radicals are generated by irradiating with ultraviolet rays the water to be treated to which hydrogen peroxide has been added
Data Source
AI summary
A pure water production apparatus has a ultraviolet ray radiation apparatus that irradiates water to be treated with ultraviolet rays; a TOC acquisition unit and a dissolved oxygen concentration acquisition unit that are provided upstream of the ultraviolet ray radiation apparatus; and a control means that controls concentration of dissolved oxygen in the water to be treated that is supplied to the ultraviolet ray radiation apparatus such that a mass ratio of the concentration of dissolved oxygen in the water to be treated that is acquired by the dissolved oxygen concentration acquisition unit to TOC in the water to be treated that is acquired by the TOC acquisition unit is 1 or more and 7 or less.