Self-Cleaning Insulator for Non-Thermal Plasma Particulate Removal
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Solution Overview
Problem
Non-thermal plasma-based systems face inefficiencies in reducing particulate matter (PM) emissions due to PM accumulation, which causes power losses and reduces the effectiveness of PM removal, necessitating the development of self-cleaning surfaces to maintain system performance and efficiency.
Innovation Solution
The implementation of non-thermal plasma-based systems with self-cleaning insulators and non-eroding washers, where the insulators are designed to oxidatively clean conductive material accumulation and are thinner than nominal thickness to prevent arcing and power loss, combined with pulsed direct current to minimize energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If non-thermal plasma-based systems are used to reduce particulate matter emissions, then PM removal effectiveness is improved, but PM accumulation on system surfaces causes power losses and reduces system performance
Solution Approach 1:
The insulator surface is designed to automatically clean itself through oxidative processes. The non-thermal plasma generates reactive oxygen species that oxidize conductive PM deposits on the insulator surface, converting them to insulating oxides that can be removed by gas flow, thereby maintaining system performance without external intervention
Solution Approach 2:
The insulator thickness is reduced from nominal thickness to a specific thinner dimension. This parameter change allows the insulator to withstand oxidative cleaning processes while preventing arcing and maintaining electrical isolation. The optimized thickness balances mechanical strength requirements with the need for effective oxidative self-cleaning
2Reliability
If insulators with nominal thickness are used, then electrical isolation is maintained, but conductive material accumulation causes arcing and power loss
Solution Approach 1:
The insulator surface performs self-cleaning through oxidation of accumulated conductive material. The non-thermal plasma environment generates reactive oxygen species that continuously oxidize PM deposits on the insulator surface, preventing the formation of conductive paths that would lead to arcing
Solution Approach 2:
The non-thermal plasma process provides an oxidizing environment with high concentrations of reactive oxygen species. This accelerated oxidation converts conductive PM material into insulating oxide compounds on the insulator surface, preventing arcing while maintaining electrical isolation
3Productivity
If continuous operation mode is used, then PM removal is maintained, but energy consumption increases and system robustness decreases
Solution Approach 1:
The system operates in pulsed cycles rather than continuous operation. During plasma discharge phases, PM is removed from the gas stream; during off-phases, the oxidizing environment continues to clean the insulator surface. This periodic operation reduces average energy consumption while maintaining effective PM removal through cumulative action
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 approach effectively reduces PM accumulation, enhances the robustness and longevity of the systems, and increases the efficiency of PM removal in gas streams by minimizing power consumption and maintaining system performance.
Implementation Method 1
the insulator is a self-cleaning insulator... self-cleaning surfaces that reduce particulate matter buildup
Implementation Method 2
a first conductor contacting the gas stream, where the first conductor comprises a portion producing non-thermal plasma (NTP)
Implementation Method 3
the insulator is a self-cleaning insulator... self-cleaning surfaces that reduce particulate matter buildup
Implementation Method 4
combined with pulsed direct current to minimize energy consumption
Data Source
AI summary
The present invention is broadly directed to non-thermal plasma-based systems for reducing the amount of particulate matter in a gas stream, as well as to methods for using such systems. The present invention is particularly directed to such non-thermal plasma-based particulate matter reduction systems with self-cleaning surfaces. Particularly contemplated are self-cleaning surfaces that reduce particulate matter buildup such as is likely to cause the reduction of non-thermal plasma production in the system, and therefore the ability of such systems to reduce the amount of particulate matter in the gas stream.