Regeneratable Surface Filter for Wet Paint Overspray Separation
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Solution Overview
Problem
Existing devices for removing wet paint overspray from exhaust air flows in painting installations require energy-intensive dehumidification and incur high costs due to the use of washing liquids, which complicates the separation process and increases expenses.
Innovation Solution
A device equipped with a regeneratable surface filter and a narrowed airflow path that uses pre-coat materials and compressed air for dry separation, eliminating the need for liquid washing and reducing energy consumption by re-circulating purified air.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If washing liquid is used to separate wet paint overspray from exhaust air flow, then separation effectiveness is improved, but energy consumption increases due to dehumidification requirements
Solution Approach 1:
The invention extracts and removes the moisture from the exhaust air flow before the separation process, using a moisture separator positioned upstream of the filter. This prevents moisture from reaching the filter media, eliminating the need for energy-intensive dehumidification while maintaining separation effectiveness.
Solution Approach 2:
The invention introduces a moisture separator as an intermediary component between the exhaust air flow and the filter. This mediator removes the harmful moisture component before it can affect the filter, allowing dry filter media to be used without compromising separation performance.
2Reliability
If washing liquid is used to remove wet paint overspray, then paint removal is improved, but treatment costs of washing liquid increase
Solution Approach 1:
The invention replaces expensive, reusable washing liquid systems with disposable or easily regeneratable filter media. The filter captures paint overspray particles directly from the air stream, and the spent filter can be disposed of or regenerated without complex liquid waste treatment infrastructure.
Solution Approach 2:
The invention replaces the chemical/washing-based removal system with a mechanical filtration system. Instead of using washing liquid to flush paint particles from the air, dry filter media mechanically capture and retain the particles through adsorption and physical filtration mechanisms.
3Reliability
If high moisture is supplied to exhaust air flow for washing, then paint separation is improved, but dehumidification complexity increases
Solution Approach 1:
Instead of adding moisture to the air stream to facilitate paint removal and then removing that moisture afterward, the invention inverts the approach by removing moisture first and then performing separation with dry media. This eliminates the need for complex dehumidification systems while achieving effective paint separation.
4Productivity
If filter surface area is increased to handle more paint overspray, then separation capacity is improved, but filter cleaning frequency increases
Solution Approach 1:
The invention changes the physical and chemical parameters of the filter media to create surfaces with high paint-holding capacity and low adhesion to cleaning agents. By selecting materials with specific surface properties, large filter areas can be operated for extended periods before cleaning or replacement is required.
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 enables efficient, energy-saving separation of wet paint overspray without liquid washing, reducing operational costs and space requirements, while extending the filter's service life and preventing premature deposition on walls.
Implementation Method 1
the flow path of the exhaust air flow from the application area to the separating apparatus comprises at least one narrowed area, whereby the central direction of flow of the exhaust air flow remains essentially preserved in passing the narrowed area
Implementation Method 2
the separation apparatus has at least one regeneratable surface filter... filter elements are used for separation of the over-spray particles from the air flow
Implementation Method 3
cleaning of the regeneratable surface filter by means of a 'dry' separation device can take place, that is, without using a cleaning fluid or a 'wet' cleaning device which utilizes a liquid
Data Source
AI summary
The invention relates to a device for removing wet paint overspray from an outgoing air flow containing over-spray particles. The device separates wet paint over-spray from an over-spray particle contained in an exhaust air stream. The overspray particles in the exhaust air stream are formed during the painting at an application area of a painting installation. The device comprises of at least one separation apparatus for separating the over-spray from the exhaust air stream. The separation apparatus includes a regeneratable surface filter and the flow path of the exhaust air stream from the application area to a separating device having at least one narrowed area. The central direction of flow of the exhaust air stream remains essentially preserved in passing by the narrowed area.