Electrostatic Precipitator Electrode Assembly with Non-Uniform Field
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Solution Overview
Problem
Existing electrostatic precipitators face challenges with particle re-entrainment and high airflow resistance due to particle agglomeration, requiring frequent cleaning and replacement, and struggle to efficiently capture a wide range of particle sizes from micron to sub-micron and ultra-fine particles.
Innovation Solution
An electrostatic precipitator electrode assembly with a non-uniform transverse electric field distribution between collector and repelling electrodes, utilizing porous open-cell foam materials and varying electrical potentials along the electrode length to distribute captured dust particles across a larger surface area, reducing re-entrainment and increasing filtration efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional electrostatic precipitators use uniform electric field distribution between parallel electrodes, then the structure is simple and easy to manufacture, but particle collection efficiency is limited and dust holding capacity is reduced due to particle agglomeration and re-entrainment
Solution Approach 1:
The patent applies local quality by creating non-uniform electric field distribution through varying the spacing between collector and repelling electrodes along the airflow path. The electrode spacing is optimized locally at different positions to maximize particle collection efficiency in each region while preventing particle agglomeration and re-entrainment, thereby improving overall productivity without requiring complete structural redesign
Solution Approach 2:
The electrode assembly is segmented into multiple sections along the airflow path, with each section having optimized electrode spacing and configuration. This segmentation allows independent optimization of electric field distribution in different regions, improving particle collection efficiency for various particle sizes while maintaining manageable structural complexity
2Productivity
If fibrous media filters are placed perpendicular to airflow to mechanically remove particles, then particle removal efficiency is improved, but airflow resistance increases significantly
Solution Approach 1:
The patent replaces the mechanical filtration mechanism of fibrous media with an electrostatic field-based particle collection system. Charged particles are removed from airflow through electrostatic attraction to collector electrodes rather than mechanical interception by fibers, achieving comparable particle removal efficiency with significantly reduced airflow resistance and energy loss
3Productivity
If electrostatic precipitators use smooth metal collector plates, then the structure is simple and easy to clean, but particle collection capacity is limited and cleaning frequency must be high
Solution Approach 1:
The patent employs porous materials as collector electrode surfaces to increase the effective surface area available for particle collection. The porous structure provides numerous collection sites within the same footprint, significantly increasing particle collection capacity while the electrostatic field prevents particle agglomeration that would block pores, thereby extending cleaning intervals
4Reliability
If foam-covered electrodes are used to increase surface area and reduce re-entrainment, then particle retention is improved, but dust holding capacity is still limited requiring frequent cleaning
Solution Approach 1:
The patent merges multiple functions into a single integrated electrode assembly: the porous foam material provides both the increased surface area for particle collection and the structural framework for distributing electric field uniformly. The repelling electrodes are positioned to work in conjunction with collector electrodes, creating a coordinated system that simultaneously achieves high particle retention and increased dust holding capacity, reducing cleaning frequency
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 non-uniform electric field distribution enhances dust holding capacity and particle retention, particularly for smaller particles, reducing the frequency of cleaning and replacement while minimizing airflow resistance.
Implementation Method 1
The corona electrodes produce a corona discharge that ionizes air molecules in an airflow received into the filter
Implementation Method 2
The corona electrodes produce a corona discharge that ionizes air molecules in an airflow received into the filter
Implementation Method 3
The ionized air molecules impart a net charge to nearby particles (e.g., dust, dirt, contaminants etc.) in the airflow. The charged particles are subsequently electrostatically attracted to one of the electrode plates
Implementation Method 4
An electrostatic precipitator electrode assembly with a non-uniform transverse electric field distribution between collector and repelling electrodes, utilizing porous open-cell foam materials and varying electrical potentials along the electrode length to distribute captured dust particles across a larger surface area
Data Source
AI summary
An electrostatic precipitator may have a set of collector electrodes and a set of repelling electrodes. The conductive portions of the collector electrodes and/or the repelling may be arranged in segments. The segments may have differing electrical properties or may be electrically isolated to facilitate differing potentials along an airflow path. The differing potentials results in differing electric field strengths along the airflow path.