Electrostatic Precipitator Segmented Electrical Fields
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electrostatic precipitators for removing particulates from boiler flue gas face issues with sparking between discharge and collecting electrodes, which limits electrical energization and complicates the structure, making them expensive to erect and maintain.
Innovation Solution
The electrostatic precipitator is designed with at least two electrical fields in succession, where the first field has more electrical units than subsequent fields, allowing each unit to be de-energized independently, reducing sparking and simplifying the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrostatic precipitator is split into separate electrical units to prevent sparking, then sparking is reduced and reliability is improved, but the structure becomes more complex and costs increase
Solution Approach 1:
The gas passage is divided into multiple electrical fields arranged in series, with each field containing discharge electrodes and collecting electrodes that form independent electrical units. This segmentation allows each unit to be de-energized independently to prevent sparking, while maintaining a relatively simple overall structure through the systematic arrangement of these modular fields.
2Productivity
If more electrical units are placed in the first electrical field, then particulate removal efficiency is improved, but the device complexity and cost increase
Solution Approach 1:
The first electrical field, where particulate charging occurs, is equipped with more electrical units than subsequent fields to maximize removal efficiency where it is most needed. Later fields have fewer units since they handle already-charged particles requiring less intensive processing. This local differentiation optimizes productivity while controlling overall device complexity.
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 configuration reduces sparking frequency, lowers maintenance costs, and achieves a simpler, more cost-effective design without compromising filtering effectiveness.
Implementation Method 1
A corona discharge from the discharge electrodes ionizes the flue gas passing between the collecting electrodes.
Implementation Method 2
The ionized gas ionizes fly ash and other particles in the flue gas.
Implementation Method 3
The electric field between the discharge electrodes and collecting electrodes drives the negatively charged particles to the collecting electrodes.
Data Source
AI summary
An electrostatic precipitator for removing particulates from boiler fine gas is provided. The electrostatic precipitator comprises discharge electrodes and collecting electrodes fitted in a gas passage, the electrodes being arranged in at least two electrical fields that are placed successively in relation to gas flow, and the electrical field establishing at least one electrical unit in transversal direction of said gas passage. The at least one electrical unit has the ability to be de-energised independently, separately from the other electrical units of the electrostatic precipitator. The first electrical field of the at least two electrical fields is also arranged first in the gas flow, and the first electrical field comprises more electrical units than a second field following the first field.