Device and method for purifying air
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Solution Overview
Problem
Existing air purification methods, such as filter and electrical dust collection, face inefficiencies in maintaining performance due to dust accumulation and difficulty in managing dust collection plates, respectively.
Innovation Solution
An air purification device utilizing discharge plasma and solution spray with a reactor containing dielectric particles, electrodes, and a liquid supplier and recoverer, which generates plasma to ionize and decompose contaminants, and a liquid to collect and remove fine dust and pollutants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter method is used to collect fine dust and contaminants, then removal efficiency is improved, but pressure drop increases and filter performance deteriorates when dust accumulates
Solution Approach 1:
The patent replaces the mechanical filtration system with a plasma-based electrical field system. The discharge plasma generator creates an electrical field that ionizes contaminants and attracts them to collection plates, eliminating the mechanical filtering action that causes pressure drop while maintaining high removal efficiency for fine dust and contaminants
Solution Approach 2:
The patent changes the operational parameters from mechanical pressure-driven flow through filters to electric field-driven particle migration. By controlling voltage, frequency, and plasma discharge parameters, the system achieves effective contaminant collection without the pressure resistance inherent in filter media
2Reliability
If an electrical dust collection method is used to ionize and adsorb contaminants, then air purification is improved, but dust collection plate management becomes difficult
Solution Approach 1:
The patent implements a self-cleaning mechanism where the collection plates are designed to be easily removable and washable. The system allows for regular maintenance without complex procedures, and the plates can be cleaned by simple washing operations, making the maintenance process straightforward and accessible
Solution Approach 2:
The dust collection plates are designed as separate, modular components that can be easily removed from the reactor for cleaning and replacement. This segmentation allows maintenance personnel to access and clean individual plates without disassembling the entire system, significantly simplifying the management and maintenance process
3Reliability
If discharge plasma is used to decompose contaminants, then removal efficiency is improved, but ozone generation increases
Solution Approach 1:
The patent introduces a liquid phase system that converts the harmful ozone byproduct into a beneficial cleaning agent. The liquid (water or alkaline solution) absorbs and reacts with ozone, transforming it from a harmful pollutant into a useful oxidizing agent that further decomposes organic contaminants, thereby eliminating the harm while enhancing the purification effect
Solution Approach 2:
The liquid phase acts as an intermediary between the plasma discharge and the final purification output. It serves as a medium that captures ozone and other reactive species from the plasma, transferring their energy to decompose contaminants in the liquid phase, and produces a cleaned effluent that is safer than the original air stream
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
Enhances the removal efficiency of fine dust, water-soluble and insoluble organic compounds, and reduces ozone generation by controlling voltage and using alkaline solutions, thereby improving overall air purification performance.
Implementation Method 1
a discharge plasma generator including a first electrode disposed on an outer wall of the reactor and a second electrode disposed inside the reactor, and configured to generate a discharge plasma in a certain discharge region
Implementation Method 2
generates plasma to ionize and decompose contaminants
Implementation Method 3
a liquid supplier configured to supply a liquid into the reactor and to spray the liquid to the packed-bed
Implementation Method 4
a plurality of dielectric particles disposed on a packed-bed of the reactor, wherein the discharge region includes the packed bed
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
An air purification device includes a reactor of a hollow shape extending in one direction, a discharge plasma generator comprising a first electrode disposed on an outer wall of the reactor and a second electrode disposed inside the reactor, and configured to generate a discharge plasma in a certain discharge region, a plurality of dielectric particles disposed on a packed-bed of the reactor, a liquid supplier configured to supply a liquid into the reactor; and a liquid recoverer configured to recover the liquid discharged from the reactor.