Electrostatic Precipitator Ground Electrode Resistor Design
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Solution Overview
Problem
Conventional electrostatic precipitators face issues with spark discharges due to narrow electrode distances, leading to reduced dust collection performance, and become bulky to maintain sufficient corona discharge, making installation challenging in confined spaces.
Innovation Solution
Incorporating an insulating substrate with a resistor and a conductive section on the ground electrode plate, allowing discharge electrodes to face the resistor at a closer interval without sparking, while maintaining a high dust collection performance by generating an appropriate corona discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the electrode-to-electrode distance is made narrow to reduce apparatus size, then the apparatus becomes compact, but spark discharge frequently occurs resulting in reduced dust collecting performance
Solution Approach 1:
An insulating layer is introduced as an intermediary between the discharge electrode and ground electrode plate. This insulating layer prevents direct electrical contact that would cause spark discharge, while still allowing the corona discharge to function effectively for dust collection. The insulating layer acts as a mediator that enables narrow electrode spacing without the harmful effects of spark discharge.
Solution Approach 2:
The electrical properties of the ground electrode plate are changed by adding an insulating layer with specific resistance characteristics. This parameter change allows the system to operate at higher voltages with narrower electrode distances without experiencing spark discharge, thereby maintaining dust collection performance while reducing apparatus size.
2Reliability
If the electrode-to-electrode distance is widened to prevent spark discharge, then spark discharge is reduced, but corona discharge quantity decreases resulting in degraded dust collecting performance
Solution Approach 1:
The insulating layer serves as a mediator that enables effective corona discharge at closer electrode distances. By preventing spark discharge while maintaining the electric field distribution needed for corona discharge, the insulating layer allows the electrode distance to be reduced without sacrificing dust collection performance.
Solution Approach 2:
The introduction of the insulating layer changes the electrical parameters of the system, allowing optimal operation at narrower electrode distances. This parameter change enables the system to maintain high corona discharge quantity without the need to widen the electrode distance.
3Productivity
If multiple discharge electrodes are disposed in the air flow direction to ensure sufficient corona discharge quantity, then dust collecting performance is maintained, but the apparatus becomes bulky in the air flow direction
Solution Approach 1:
The insulating layer on the ground electrode plate acts as a mediator that enhances corona discharge efficiency at closer electrode distances. This allows fewer discharge electrodes to be used while maintaining sufficient corona discharge quantity, thereby reducing the apparatus length in the air flow direction.
Solution Approach 2:
The electrical parameters are changed by adding the insulating layer, which improves corona discharge efficiency. This parameter change allows the system to achieve sufficient corona discharge quantity with fewer discharge electrodes, reducing the overall apparatus dimensions.
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 solution prevents spark discharges, allows for a more compact design, and maintains effective dust collection efficiency by optimizing the corona discharge generation and distribution.
Implementation Method 1
By supplying a DC high voltage to discharge electrode 104 from a DC high voltage power supply, a corona discharge is generated between ground electrode plate 101 and discharge electrode 104 so that suspended particulate matters in the air are charged and collected.
Implementation Method 2
the ground electrode plate is provided with an insulating substrate, a resistor formed on the surface of the insulating substrate, and a conductive section that is electrically connected to the resistor
Data Source
AI summary
An electrostatic precipitator is provided with a ionizing unit and a collecting unit placed on the downstream side of the ionizing unit, and the ionizing unit has discharge electrodes each of which generates a corona discharge and a ground electrode plate connected to the earth, and in this structure, the ground electrode plate is provided with an insulating substrate, a resistor formed on the surface of the insulating substrate and a conductive section that is electrically connected to the resistor on the surface of the insulating substrate, and the discharge electrodes face the resistor of the ground electrode plate at a predetermined interval.