Filter Arrangement for In-Place Cleaning of Process Gases
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Solution Overview
Problem
Current filter arrangements for cleaning gases contaminated with particles cannot be completely cleaned in place without disassembly, making it difficult to remove filter dust that has penetrated into the clean air region and complicating the cleaning process.
Innovation Solution
The filter arrangement allows for the relative movement of the exterior and interior filters to expose a gap in their lower regions, enabling cleaning with a cleaning fluid, ultrasonic cleaning, and drying, with provisions for fluid injection and drainage through the gap, and using a drive mechanism to facilitate the movement of the filters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the filter unit is cleaned by blowing off dust in counterflow, then dust on the exterior filter and interior filter can be removed, but complete cleaning is not possible and filter dust penetrating into the clean air region cannot be removed
Solution Approach 1:
The patent applies the dynamics principle by making the interior filter movable relative to the exterior filter. The interior filter can be lowered to expose its lower surface and the gap between the filters, enabling cleaning access that would otherwise be impossible. This dynamic adjustment allows cleaning fluid to reach all surfaces including the previously inaccessible lower interior filter surface and gap regions.
Solution Approach 2:
The patent segments the filter system into an exterior filter and an interior filter that can move independently. By separating the filters and allowing the interior filter to be positioned lower, the cleaning process can be divided into accessible regions, enabling complete cleaning of all surfaces including those that would otherwise be blocked.
2Reliability
If the filter unit is disassembled for complete cleaning, then all filter surfaces can be cleaned, but the cleaning process becomes more complex and time-consuming
Solution Approach 1:
Instead of complete disassembly, the patent uses controlled movement of the interior filter relative to the exterior filter to expose cleaning-accessible regions. This dynamic positioning achieves complete cleaning without requiring full disassembly, maintaining system integrity while enabling thorough cleaning of all surfaces including the lower interior filter and gap regions.
3Device complexity
If the interior filter is fixed in position, then the filter unit structure is simple, but cleaning of the lower interior filter surface and gap region is impossible
Solution Approach 1:
The patent introduces controlled mobility of the interior filter relative to the exterior filter, allowing it to be lowered to expose the lower interior filter surface and the gap between filters for cleaning. This dynamic feature adds minimal complexity while enabling access to previously inaccessible cleaning regions, achieving complete in-place cleaning capability.
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
This solution allows for comprehensive in-place cleaning of the filter units, enabling effective removal of contaminants and efficient drying, while maintaining the filters' functionality without disassembly, thus enhancing the cleaning process efficiency.
Implementation Method 1
cleaning by means of (CIP) fluid sprayed into the clean space region between the interior filter and the exterior filter
Implementation Method 2
an ultrasound transducer protrudes into the coupling medium to generate the ultrasound in said coupling medium
Implementation Method 3
ultrasonic cleaning if the filter unit is equipped with metal filters
Implementation Method 4
drying of the filters on the inside and outside with the gap opened by drying air flowing in from the slotted disk
Data Source
AI summary
A filter arrangement, for cleaning gases contaminated with particles, has at least one filter unit with an exterior and an interior filter (3.1, 3.2), wherein the exterior and interior filters can be moved relative to each other, thereby exposing an opening (3.4) in the bottom regions thereof. This allows cleaning of filter units at the site of the filter units without disassembly of the same (cleaning in place—CIP). A method for cleaning is provided in that the region of the filter unit on the clean gas side including introducing a fluid sprayed via a cleaning lance protruding into the clean gas region while exposing a gap (3.4) in the bottom region of the exterior and interior filters.