ESP Dual Transformer Segmented Electrode Voltage Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional Electrostatic Precipitators (ESPs) face inefficiencies due to sparking and back corona effects, which are directly proportional to the high voltage applied, leading to reduced capture of submicron particles and increased operational limitations.
Innovation Solution
The introduction of high voltage relays and local alumina insulators allows for local control of sparking and back corona, enabling the use of higher voltage levels without reducing efficiency, and the use of two transformers per field allows for differential voltage application along the same corridor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high voltage is applied to all emitting electrodes in a field, then particle collection efficiency is improved, but sparking and back corona effects increase
Solution Approach 1:
The patent divides the emitting electrodes into two distinct groups: relayed electrodes (first group) and non-relayed electrodes (second group). Each group is controlled by separate high voltage transformers, allowing independent voltage application. This segmentation enables optimized voltage control for different regions along the corridor, improving particle collection efficiency while managing sparking and back corona effects through differentiated voltage levels.
Solution Approach 2:
The patent implements local control of voltage by applying different voltage levels to different groups of electrodes along the corridor. The relayed electrodes receive voltage through switching relays that can be independently controlled, while non-relayed electrodes receive continuous voltage. This local quality approach allows optimization of voltage distribution along the corridor to maximize collection efficiency and minimize harmful effects in specific regions.
2Productivity
If voltage is increased to capture superfine particles, then collection efficiency for superfine particles is improved, but sparking effects increase
Solution Approach 1:
The patent introduces dynamic voltage control through high voltage relays that can switch voltage on and off for the first group of electrodes. This dynamic capability allows the system to apply higher voltage levels to non-relayed electrodes for superfine particle capture while using relays to control and limit voltage in regions where sparking is more likely to occur, optimizing the balance between collection efficiency and sparking prevention.
3Device complexity
If uniform voltage is applied to all electrodes, then device simplicity is maintained, but local optimization of particle collection is lost
Solution Approach 1:
The patent segments the voltage control system into two independent high voltage transformers, each controlling a specific group of electrodes. This segmentation introduces controlled complexity to enable local optimization of voltage distribution along the corridor, improving particle collection efficiency in different regions while maintaining a relatively simple overall system architecture based on conventional transformer and relay components.
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 solution enhances the collection efficiency of ESPs by allowing higher voltage operation while controlling sparking and back corona, effectively capturing both superfine and coarser particles, and reducing re-entrainment and operational costs.
Implementation Method 1
These elements, associated with a single High Voltage Transformer form a set called Field
Implementation Method 2
On each of the emitting electrodes an ionization effect is produced by the HV. The ionized zone around each emitting electrode is known as Corona
Implementation Method 3
The ions generated in the Corona migrate towards the grounded plates, known as collector plates
Implementation Method 4
the ions lend electrostatic charges to the particles
Implementation Method 5
Under the action of the Electric Field originated at the emitting electrodes, the now charged particles are pushed towards the collector plates, where they are deposited in form of layers
Data Source
Figure 1
Figure 2
AI summary
The invention defines a new model of Electrostatic Precipitator (ESP) provided with a new control variable, obtained by adding a second HV transformer to each ESP Field. One HV transformer will have the task to control the voltage applied to relayed and locally isolated emitting electrodes, while the other HV transformer controls the voltage applied to the remaining non-relayed and non-isolated emitting electrodes of the corridors of the field. This dual independent control capability results in a large increase in collection efficiency.