Ozone Generator Dielectric Tube Segmentation for Uniform Discharge
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Solution Overview
Problem
Conventional ozone generating apparatuses face challenges in maintaining uniform discharge gaps, which affects ozone generation efficiency, as shorter gaps lead to non-uniform discharges and increased gas pressure drops, while longer gaps reduce efficiency.
Innovation Solution
The apparatus employs a dielectric tube with an outer diameter of 12 mm to 19 mm, a discharge gap length of 0.15 mm to 0.3 mm, and uses spacers or projections to maintain a consistent gap, along with a stainless steel wool material and pulsed high voltage to stabilize the discharge and enhance ozone production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the discharge gap length is shortened to increase ozone generation efficiency, then ozone generation efficiency is improved, but uniform discharge cannot be maintained and gas pressure drop increases
Solution Approach 1:
The dielectric tube is divided into multiple segments with different outer diameters along its axial direction. Each segment creates a different discharge gap length, allowing the system to optimize for both efficiency (shorter gaps) and uniformity (varied gaps preventing discharge concentration). This segmentation resolves the contradiction by spatially distributing different gap lengths.
Solution Approach 2:
Different portions of the dielectric tube have different outer diameters, creating locally optimized discharge characteristics. The varied local geometry ensures that discharge is distributed uniformly along the tube length while maintaining short gap lengths for high efficiency in each local region.
2Productivity
If the discharge gap length is shortened to increase ozone generation efficiency, then ozone generation efficiency is improved, but gas pressure drop increases
Solution Approach 1:
By segmenting the dielectric tube into different diameter sections, the gas flow path is optimized. The varied geometry allows short discharge gaps for efficiency while maintaining adequate flow cross-sections to limit pressure drop accumulation along the tube length.
3Stress or pressure
If the dielectric tube outer diameter is reduced to decrease gas pressure drop, then gas pressure drop is reduced, but discharge area decreases affecting efficiency
Solution Approach 1:
The dielectric tube uses multiple diameter segments rather than a uniform diameter. This allows certain sections to have larger diameters for adequate discharge area and others to have smaller diameters for reduced pressure drop, optimizing both parameters simultaneously through spatial distribution.
Solution Approach 2:
Instead of optimizing a single diameter parameter, the solution moves to a two-dimensional parameter space by varying the diameter along the axial direction. This dimensional change allows independent optimization of discharge area (cross-sectional dimension) and pressure drop (longitudinal dimension).
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 configuration ensures uniform discharge, reduces gas pressure drop, and increases ozone generation efficiency while maintaining accurate diameter and discharge area, suppressing thermal decomposition and achieving high ozone production.
Implementation Method 1
A silent discharge is generated in the discharge gap by allowing a feed gas containing oxygen gas to flow through the discharge gap, while applying a high voltage across the first and second electrodes. The oxygen contained in the feed gas is ozonized by the silent discharge, producing an ozonized gas.
Implementation Method 2
The oxygen contained in the feed gas is ozonized by the silent discharge, producing an ozonized gas.
Data Source
AI summary
An ozone generating apparatus according to one embodiment includes a hollow cylindrical sealed container provided with an inlet for a feed gas containing oxygen gas and an outlet for an ozonized gas. A discharge tube including a dielectric tube arranged within the container and a first electrode arranged within the dielectric tube is provided in the container. A second electrode is arranged within the container and surrounds the first electrode, spaced apart from the dielectric tube to form a discharge gap between the second electrode and the dielectric tube. The apparatus further includes a discharge voltage source configured to apply a discharging voltage across the first and second electrodes, and a cooling water jacket surrounding the second electrode. The dielectric tube has an outer diameter of 12 mm or more, but 19 mm or less.