Plasma Liquid Treatment Device with Permeable Electrode
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Solution Overview
Problem
Existing devices for plasma treatment of liquids, such as 'water-film reactors,' are not suitable for effective disinfection of tap water directly after the outlet tap and are not designed for generating plasma-treated water for surface disinfection, with limitations in space efficiency and treatment effectiveness.
Innovation Solution
A device featuring a high-voltage electrode and a liquid-permeable ground electrode with a dielectric barrier discharge space, allowing for the generation of a non-thermal plasma that treats liquids efficiently by forming a homogeneous liquid film, which can be used for purifying and disinfecting water, as well as disinfecting surfaces and optimizing plant growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional water-film reactors are used for plasma treatment, then pollutant breakdown is achieved, but the device is not suitable for direct tap water disinfection and requires repeated treatment cycles
Solution Approach 1:
The patent changes the operational parameters by using atmospheric pressure plasma instead of vacuum plasma, and by optimizing the electrode configuration and water flow rate to achieve effective disinfection in a single pass through the reactor, eliminating the need for repeated treatment cycles
Solution Approach 2:
The device segments the treatment process into distinct zones: a plasma generation zone with dielectric barrier discharge, a water film flow zone, and a collection zone, allowing each segment to be optimized for its specific function and enabling effective single-pass treatment
2Reliability
If conventional plasma reactors are used, then plasma treatment is achieved, but the device occupies significant space and is not space-saving
Solution Approach 1:
The patent implements a nested structure where the water film flows over the surface of one electrode while the plasma is generated in the space between concentric electrodes, effectively utilizing the internal volume and reducing the overall device footprint
Solution Approach 2:
The invention transitions from treating bulk liquid to treating a thin liquid film on the electrode surface, utilizing the two-dimensional surface area of the electrode to maximize plasma-liquid interaction while minimizing the three-dimensional space required
3Reliability
If conventional water-film reactors are used, then pollutant breakdown is achieved, but the device requires complex electrode arrangements and is not simple in design
Solution Approach 1:
The dielectric barrier serves multiple functions: it prevents direct current discharge, enables plasma generation, and provides a surface for water film flow, thereby simplifying the overall electrode configuration while maintaining effective pollutant breakdown capability
Solution Approach 2:
The use of dielectric materials combined with conductive electrodes creates a composite structure that integrates multiple functions into a single component, reducing the number of separate parts and simplifying the device design
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 device enables effective plasma treatment of liquids in a space-saving manner, producing reactive species that purify and disinfect water, making it suitable for household use and enhancing agricultural growth processes.
Implementation Method 1
a dielectric barrier discharge in the discharge space, in particular a volume dielectric barrier discharge
Implementation Method 2
generate a non-thermal plasma under atmospheric pressure by means of a dielectric barrier discharge
Data Source
AI summary
The invention relates to a device (10) for treating a liquid with a plasma, wherein the device (10) has a high-voltage electrode (20) as well as a liquid-permeable ground electrode device (30). The ground electrode device (30) has a flat, conductive region (32) and a porous region (34) arranged on the flat, conductive region (32), wherein the conductive region (32) is liquid-permeable along its flat extension. A discharge space (40) is formed between the ground electrode device (30) and the high-voltage electrode (20). A first dielectric (50) is arranged on the high-voltage electrode (20) so that a plasma can be generated in the discharge space (40) by means of a dielectric barrier discharge. Moreover, the device (10) has an initial flow volume (60) into which the liquid (12) can be conducted, and that is surrounded by a wall (62). At least in a first region, the wall (62) of the initial flow volume (60) has the ground electrode device (30) such that the initial flow volume (60) is connected to the discharge space (40) in a liquid permeable manner via the ground electrode device (30).