Electrostatic Filter Perforated Repulsion Electrode Ozone Reduction
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Solution Overview
Problem
Existing electrostatic filters face challenges in efficiently removing particles from gas flows while minimizing ozone production and maintaining optimal operating conditions, due to high voltage-induced ionization leading to ozone generation and structural complexity.
Innovation Solution
An electrostatic filter design featuring plate-like repulsion and collection electrodes with perforations, optimized power supply to prevent ozone production, and a potential configuration that allows for efficient particle capture without the need for an ionization stage, incorporating a third stage for ozone removal to minimize load losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high voltage is applied to ionize particles for electrostatic filtration, then particle capture efficiency is improved, but ozone generation increases
Solution Approach 1:
The filter is divided into two distinct stages: an ionization stage with filiform electrodes that operate at lower voltages to generate ions, and a capture stage with plate electrodes that operate at higher voltages to capture charged particles. This segmentation allows each stage to be optimized independently, preventing ozone generation in the capture stage while maintaining high particle removal efficiency.
Solution Approach 2:
Ions generated in the first stage act as intermediaries that transfer charge to particles without requiring high voltage in the capture stage. The ions serve as a mediator between the power supply and particles, enabling efficient particle capture at lower voltages and reducing ozone generation from electrical breakdown of air.
2Productivity
If traditional electrostatic filter configuration is used, then particle filtration is achieved, but device complexity and structural bulk increase
Solution Approach 1:
Multiple functional elements are merged into integrated assemblies: support structures simultaneously hold both ionization and capture electrodes, electrical connection means integrate power delivery to both stages, and the overall configuration combines ionization and capture functions in a compact arrangement, reducing device complexity while maintaining filtration performance.
3Productivity
If high voltage is continuously applied for particle capture, then particle removal efficiency is maintained, but energy consumption increases
Solution Approach 1:
The ionization stage continuously generates ions that charge particles as they pass through, ensuring particles are always charged for capture. This continuous ion generation maintains particle removal efficiency without requiring fluctuating high voltages, optimizing energy consumption while sustaining filtration performance.
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 filter achieves high energy efficiency in particle removal with minimal ozone emission, ensuring safe operation and reduced structural bulk, enabling versatile applications in both industrial and civil settings.
Implementation Method 1
The edges of connection of the holes with the two faces of the plate have radii of curvature with localized concentrations of the electric field, with consequent emission of positive electric charges in the gas flow
Implementation Method 2
localized concentrations of the electric field, with consequent emission of positive electric charges in the gas flow
Implementation Method 3
their subsequent capture on plates power supplied (or not) at a different potential, towards which the particles are directed by forces of Coulomb type produced by the electric field
Implementation Method 4
optimized power supply to prevent ozone production... high voltage-induced ionization leading to ozone generation
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
Electrostatic filter (1) for purifying a flow of gas, and in particular air, which comprises a capture stage (S2) placed to intercept a gas flow (F) and provided with at least one positively-charged plate-like repulsion electrode (5) and with at least one plate-like collection electrode (6) at ground potential, which are extended parallel to the advancement direction of the gas flow (F). The plate-like repulsion electrode (5) is provided with a plurality of holes (12) distributed on its surface, whose edges of connection with its two faces have radii of curvature with localized concentrations of electric field with consequent emission of positive electric charges (4) in said gas flow (F).