Electrostatic charging air cleaning device and collection electrode
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional air cleaning technologies, such as HEPA filters and electrostatic precipitators, face limitations in removing volatile organic compounds (VOCs) and gases like NOx and CO, and require frequent maintenance due to bio-fouling and clogging, necessitating a high surface area collection electrode for improved air cleaning efficiency.
Innovation Solution
A method for forming a high surface area collection electrode using a slurry of carbon black powder, polymeric binder, and liquid solvent applied to a substrate, which is then cured to create a coating layer, enhancing the electrostatic charging air cleaning device's ability to adsorb particulate matter without frequent maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HEPA filters are used to remove particulate matter, then removal efficiency is improved (99.97% of PM0.3), but the filters require frequent replacement due to bio-fouling and clogging
Solution Approach 1:
The invention changes the fundamental operating principle from mechanical filtration to electrostatic precipitation. By applying high voltage to corona wires, particles are charged and attracted to collection plates through electrostatic forces, eliminating the clogging and bio-fouling issues inherent in mechanical filters while maintaining high removal efficiency
Solution Approach 2:
The patent replaces the mechanical filtration mechanism of HEPA filters with an electrostatic field-based precipitation system. The corona discharge wires create an electrostatic field that charges particles and directs them to collection plates, substituting physical barrier filtration with field-based particle manipulation
2Duration of action of stationary object
If conventional electrostatic precipitators are used, then maintenance frequency is reduced, but the surface area of collection electrodes is insufficient for high efficiency air cleaning
Solution Approach 1:
The collection plates are designed with porous structures that dramatically increase the effective surface area available for particle collection. This porous architecture allows particles to be captured throughout the volume of the plate rather than just on the external surface, effectively multiplying the collection area without increasing the physical footprint
Solution Approach 2:
The invention transitions from two-dimensional flat collection surfaces to three-dimensional porous structures. By utilizing the internal porosity and volumetric capacity of the collection plates, the effective collection surface area is expanded into the third dimension, allowing vastly increased particle capture capacity within the same device volume
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 high surface area collection electrode effectively traps particulate matter, extending the device's operational life to 3 to 5 years without maintenance, even in high pollution environments, by maintaining a high clean air delivery rate and reducing maintenance needs.
Implementation Method 1
a wire-plate pre-charger configured to generate a corona discharge to electrostatically charge particulate matter (PM) in an air stream
Implementation Method 2
a collection electrode configured to receive the conveyed electrostatically charged PM and to adsorb the PM
Data Source
AI summary
A method of forming a collection electrode for an electrostatic charging air cleaning device. The method includes forming a slurry including a carbon black powder material, a polymeric binder material and a liquid solvent material. The method further includes applying the slurry to a substrate material. The method also includes curing the slurry to obtain a coating layer on the substrate material to form the collection electrode.