Liquid Treatment Device Bubble Plasma Generation
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Solution Overview
Problem
Existing liquid treatment apparatuses have low efficiency and require a long time to treat liquids, and are difficult to miniaturize due to their structure, which limits the generation of plasma and effective treatment of liquids.
Innovation Solution
A liquid treatment apparatus using a dielectric tube with a first electrode and a second electrode, where the longitudinal direction of the first electrode crosses the flow direction of the liquid, and a gas supplier generates a bubble that covers the first electrode, allowing for efficient plasma generation and radical production by applying voltage between the electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing liquid treatment apparatuses use conventional electrode structures, then plasma can be generated, but the treatment efficiency is low and the apparatus size cannot be reduced
Solution Approach 1:
The apparatus is segmented into modular components: a first electrode unit with gas supply for bubble generation, a second electrode unit, and a dielectric tube. This segmentation allows independent optimization of each component and improves overall treatment efficiency while maintaining compact structure.
Solution Approach 2:
The first electrode and second electrode are nested within the dielectric tube, with the gas supply system integrated into the first electrode structure. This nested arrangement maximizes space utilization, enabling efficient plasma generation in a compact apparatus configuration.
2Loss of time
If conventional electrode arrangements are used, then electrodes can be disposed in liquid, but treatment time is excessive
Solution Approach 1:
Gas is supplied to the first electrode before voltage application to pre-form bubbles in the liquid. This preliminary bubble formation ensures that plasma is generated immediately upon voltage application, eliminating delay time and improving treatment speed.
Solution Approach 2:
The apparatus uses periodic voltage application between the first and second electrodes to generate plasma in a controlled manner. This periodic action maintains high treatment efficiency while allowing for optimal plasma generation cycles, reducing overall treatment time.
3Reliability
If plasma generation is limited by conventional structures, then apparatus can be simple, but liquid treatment effectiveness is insufficient
Solution Approach 1:
A dielectric tube is introduced as an intermediary between the first and second electrodes. This dielectric barrier controls plasma generation, preventing direct contact between electrodes while enabling reliable plasma formation in the liquid, thereby ensuring sterilization effectiveness with a manageable electrode configuration.
Solution Approach 2:
The apparatus controls plasma generation parameters by adjusting voltage amplitude, frequency, and gas supply rate. These parameter changes optimize plasma density and reactivity, ensuring effective sterilization and decomposition without requiring overly complex electrode structures.
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 improves the efficiency and speed of liquid treatment, allowing for effective sterilization and decomposition of substances in a shorter time while reducing the apparatus size.
Implementation Method 1
causes an electrical discharge by applying a high-voltage pulse to these electrodes, to generate plasma
Implementation Method 2
generate plasma in a bubble that is formed by instantaneous boiling
Implementation Method 3
generates a bubble that covers the first electrode
Implementation Method 4
the longitudinal direction of the first electrode crosses a direction in which the water to be treated flows
Data Source
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AI summary
A liquid treatment apparatus (100) according to the present disclosure includes a dielectric tube (101) through which water to be treated flows, a first electrode (102) at least a part of which is disposed in the dielectric tube (101), a second electrode (103) at least a part of which is disposed in the dielectric tube (101) at a position upstream of the first electrode (102), a gas supplier (105) that supplies a gas for generating a bubble (111) that covers a conductor-exposed portion of the first electrode (102), and a power supply (104) that applies a voltage between the first electrode (102) and the second electrode (103).