Liquid Treatment Device Plasma Generation Efficiency
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Solution Overview
Problem
Conventional liquid treatment devices have low plasma generation efficiency, leading to prolonged treatment times and ineffective generation of products such as OH radicals and nitrogen compounds.
Innovation Solution
A liquid treatment device with a first electrode, a second electrode in the liquid, an insulator with an opening portion, and a power source generating plasma in the vicinity of the opening, along with a supply device that fills the space between the electrodes with liquid before voltage application, reducing nitrogen compound generation and enhancing OH radical production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional liquid treatment devices use high-voltage pulse discharge or gas supply methods to generate plasma, then plasma can be generated in the liquid, but the plasma generation efficiency is low and treatment time is prolonged
Solution Approach 1:
The insulator is pre-positioned around the first electrode with its opening portion facing the liquid, creating a predetermined plasma generation zone. This preliminary structural arrangement ensures that when voltage is applied, plasma is immediately generated at the optimal location for efficient liquid treatment, eliminating the need for time-consuming plasma initiation delays found in conventional devices
Solution Approach 2:
The insulator acts as an intermediary component between the first electrode and the liquid, concentrating the electric field at its opening portion. This intermediary structure enables efficient plasma generation directly at the liquid interface, significantly improving plasma generation efficiency and reducing treatment time compared to direct electrode-liquid contact methods
2Productivity
If gas is supplied through electrodes to create air bubbles for plasma generation, then plasma can be generated, but nitrogen compounds are generated and power consumption increases
Solution Approach 1:
The invention extracts and eliminates the need for gas supply through electrodes by using the insulator's opening portion to generate plasma directly in the liquid. This removes the source of nitrogen compounds and excessive power consumption associated with gas-based plasma generation, while maintaining effective plasma treatment capability
Solution Approach 2:
The invention changes the fundamental parameter of plasma generation from gas-phase (using supplied gas to create air bubbles) to liquid-phase (direct plasma generation in liquid through insulator opening). This parameter change eliminates nitrogen compound generation and reduces power consumption while improving plasma generation efficiency
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 device efficiently generates plasma and long-life OH radicals, allowing for rapid treatment of liquids by controlling the products generated by plasma, reducing treatment time and improving decomposition efficiency.
Implementation Method 1
a power source applying voltage between the first electrode and the second electrode so as to generate plasma in the vicinity of the opening portion of the insulator
Implementation Method 2
an insulator disposed around the first electrode with a space between the first electrode and the insulator, wherein the insulator has an opening portion in a position in contact with the liquid to be treated
Data Source
AI summary
The present disclosure provides a liquid treatment device, a liquid treatment method, and a plasma treatment liquid each capable of efficiently generating plasma and treating a liquid in a short time period. A liquid treatment device according to the present disclosure includes a first electrode, a second electrode disposed in a liquid to be treated, an insulator disposed around the first electrode with a space between the first electrode and the insulator, the insulator has an opening portion in a position in contact with the liquid to be treated, a power supply that applies voltage between the first electrode and the second electrode, and a supply device supplying a liquid to the space before the power source applies the voltage.