Rotating Electrode Liquid Treatment Apparatus for Stable Plasma Generation
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Solution Overview
Problem
Conventional liquid treatment apparatuses require high applied voltage and have low plasma generation efficiency, leading to prolonged treatment times and unstable plasma generation due to electrode wear from biased tip shapes during long-term operation.
Innovation Solution
A liquid treatment apparatus with a tubular treatment tank and rotating bar-shaped electrode, where the electrode is rotated to maintain even wear, reducing electric power consumption and stabilizing plasma generation by applying a pulse voltage to a gas phase within a swirling liquid flow, thereby enhancing plasma efficiency and treatment speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a high voltage pulse is applied to vaporize liquid and generate plasma, then plasma generation is achieved, but the applied voltage requirement is high and plasma generation efficiency is low
Solution Approach 1:
The invention changes the physical state parameter of the treatment medium from liquid to gas phase. By vaporizing the liquid beforehand and then applying plasma to the gas phase, the plasma generation efficiency is significantly improved while reducing the required applied voltage and electric power consumption.
Solution Approach 2:
The invention performs preliminary vaporization of the liquid before plasma treatment. The liquid is vaporized in advance through heating or other means, and then the vaporized gas phase is subjected to plasma generation, which improves plasma generation efficiency and reduces energy consumption during the plasma treatment stage.
2Duration of action of stationary object
If the electrode operates for a long time, then continuous treatment is achieved, but the electrode tip becomes worn and biased, causing unstable plasma generation
Solution Approach 1:
The invention introduces a rotation mechanism that makes the electrode dynamic rather than stationary. The electrode rotates about its central axis during operation, which prevents the tip from becoming worn and biased in a fixed direction, thereby maintaining stable plasma generation over extended operational periods.
3Productivity
If gas is interposed between electrodes to improve plasma generation efficiency, then plasma efficiency increases, but the device complexity increases
Solution Approach 1:
The invention utilizes phase transition of the treatment liquid from liquid to gas phase. By vaporizing the liquid and treating the vapor phase with plasma, the treatment efficiency is significantly improved while avoiding the need for separate gas introduction systems, thus not increasing device complexity.
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
The apparatus efficiently generates plasma for rapid and stable liquid treatment over extended periods, reducing electrode wear and operational costs while maintaining plasma stability, allowing for continuous operation.
Implementation Method 1
the liquid is vaporized in the swirling flow, and a pulse voltage is applied to the generated gas phase to generate plasma
Implementation Method 2
by rotating the first electrode about the central axis of the first electrode by the electrode rotation device, the tip of the first electrode can be worn on average about the central axis thereof
Implementation Method 3
a pulse voltage is applied to the generated gas phase to generate plasma
Data Source
AI summary
A liquid treatment apparatus including: a tubular treatment tank whose end along a central axis is closed and sectional shape orthogonal to the central axis is a circular shape; a first electrode disposed on one end of the central axis of the treatment tank and having a bar shape; a second electrode disposed on the other end thereof; a power supply applying voltage between the first electrode and the second electrode; a rotation mechanism rotating the first electrode about a central axis of the first electrode; and an air introduction portion introducing the liquid to the one end of the central axis of the treatment tank from a tangential direction of the circular sectional shape of the treatment tank, and causing liquid to swirl about the central axis of the treatment tank therein to generate a gas phase in a swirling flow of the liquid.