Liquid Processing Apparatus Insulator Shielding for Plasma Stability
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Solution Overview
Problem
Existing liquid processing apparatuses face issues with discharge efficiency and safety due to Maxwell stress-induced liquid entry into the insulator, leading to potential burning of components and reduced performance over time.
Innovation Solution
A liquid processing apparatus design featuring a cylindrical metallic member electrically connected to the first electrode, which surrounds the insulator and maintains the same potential as the electrode, preventing liquid entry into the insulator and minimizing electric field intensity within the insulator, thereby preventing unwanted discharge and maintaining apparatus performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If gas is supplied through an opening in the insulator to produce bubbles and generate plasma, then decomposition efficiency is improved, but Maxwell stress causes liquid to enter the insulator leading to component burning and reduced reliability
Solution Approach 1:
The metallic member is electrically connected to the first electrode and configured to have substantially the same potential as the first electrode. This equipotential configuration minimizes electric field intensity within the insulator, preventing liquid entry caused by Maxwell stress while maintaining plasma generation efficiency for decomposition
Solution Approach 2:
A metallic member is introduced as an intermediary component between the first electrode and the insulator. This metallic member acts as a shield that prevents liquid from entering the insulator by maintaining equipotential conditions, thereby protecting the insulator from burning while allowing gas to pass through for plasma generation
2Productivity
If high voltage is applied between electrodes to generate plasma in bubbles, then decomposition performance is improved, but unwanted discharge occurs in the insulator reducing system safety
Solution Approach 1:
By configuring the metallic member to have substantially the same potential as the first electrode through electrical connection, the electric field intensity within the insulator is minimized. This prevents unwanted discharge in the insulator while maintaining high voltage plasma generation between the first electrode and second electrode for decomposition performance
3Power
If the insulator is exposed to high electric field intensity, then plasma generation is effective, but liquid entry into the insulator causes component burning and performance degradation
Solution Approach 1:
The metallic member is electrically connected to the first electrode to maintain substantially the same potential, creating equipotential regions that minimize electric field intensity within the insulator. This prevents liquid entry and component burning while allowing effective plasma generation to occur in the liquid processing region
Solution Approach 2:
The system is segmented into distinct functional regions: the metallic member and first electrode form an equipotential shield around the insulator, while the space between the first electrode and second electrode serves as the plasma generation zone. This segmentation allows high electric field intensity only where needed for plasma generation while protecting the insulator
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 solution effectively prevents liquid entry into the insulator, maintains discharge efficiency, and enhances safety by reducing the risk of component burning, ensuring long-term performance and cost-effectiveness.
Implementation Method 1
a power source that applies a voltage between the first electrode and the second electrode and generates plasma
Implementation Method 2
The metallic member is electrically connected to the first electrode. At least a part of the first insulator is disposed between the first electrode and the metallic member
Implementation Method 3
a gas supply device that supplies gas into the space and releases the gas into the liquid via the opening
Data Source
AI summary
A liquid processing apparatus includes a container for holding liquid, a first electrode, a second electrode, a first insulator that has a cylindrical shape and at least partly surrounds a side face of the first electrode via a space, the first insulator having an opening in an end face of the first insulator, a gas supply device that supplies gas into the space and releases the gas into the liquid via the opening, a power source that applies a voltage between the first electrode and the second electrode and generates plasma, and a metallic member that partly surrounds the side face of the first electrode via the space. The metallic member is electrically connected to the first electrode. At least a part of the first insulator is disposed between the first electrode and the metallic member.