Filter Medium Cleaning via Solid Particle Scraping
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Solution Overview
Problem
Current methods for removing blockages from filter media in cross-flow filtration require shutting down the filtration unit, leading to increased maintenance costs and downtime, as they typically involve replacing the filter medium or reversing the flow.
Innovation Solution
Introducing larger second particles that scrape or vibrate against the filter medium to dislodge blockages, allowing for continuous operation without shutting down the unit, with options for recycling and processing these particles to maintain filter efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional methods (replacing filter medium or reversing flow) are used to remove blockages, then filter medium cleanliness is improved, but equipment downtime increases and maintenance costs rise
Solution Approach 1:
The system uses the filtered solids themselves as the cleaning agent. The solids are conveyed along the filter medium and used to scrape and dislodge blockages, eliminating the need for external cleaning equipment or process shutdowns. This self-service approach resolves the contradiction by maintaining filter cleanliness while avoiding equipment downtime.
Solution Approach 2:
The filtered solids act as an intermediary substance between the blockage problem and the solution. Instead of directly replacing the filter or reversing flow, the solids serve as a mediating agent that mechanically removes blockages through scraping and vibration, thereby cleaning the filter medium without shutting down equipment.
2Productivity
If filter medium is replaced to remove blockages, then filtration efficiency is restored, but operational continuity is disrupted
Solution Approach 1:
The system maintains continuous filtration operation by implementing an ongoing solids conveyance and cleaning process. The solids continuously move along the filter medium, providing sustained cleaning action without interrupting the filtration process. This ensures both productivity is maintained and operational continuity is preserved.
Solution Approach 2:
The filtered solids continuously serve the dual function of being the filtered product and the cleaning agent. This continuous self-service mechanism restores and maintains filtration efficiency without disrupting operational continuity, as the cleaning action occurs concurrently with filtration.
3Quantity of substance
If solids build-up is allowed to block pores, then filter capacity increases, but flow rate decreases
Solution Approach 1:
The system implements periodic cleaning action through the continuous conveyance and cyclical contact of solids with the filter medium. The solids are continuously moved along the filter surface, providing periodic scraping and vibration that prevents excessive blockage accumulation. This maintains optimal pore openness for fluid flow while still allowing sufficient solids capacity.
Solution Approach 2:
The filtered solids serve as an intermediary that regulates the balance between solids capacity and flow rate. By continuously contacting the filter medium, the solids prevent excessive blockage while allowing adequate solids retention, thereby maintaining both filter capacity and fluid flow rate at optimal levels.
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
Enables the removal of blockages without shutting down the filtration unit, reducing maintenance time and costs by using oversized particles to clear blockages, thereby maintaining continuous operation and improving filter efficiency.
Implementation Method 1
inserting second particles of a second solid into the filter. These second particles scrape, vibrate, agglomerate, or a combination thereof along the filter medium, thus dislodging at least a portion of the blocking particles
Implementation Method 2
These second particles scrape, vibrate, agglomerate, or a combination thereof along the filter medium, thus dislodging at least a portion of the blocking particles
Implementation Method 3
These second particles scrape, vibrate, agglomerate, or a combination thereof along the filter medium, thus dislodging at least a portion of the blocking particles
Data Source
AI summary
Disclosed are methods for concentrating solids and removing solids from a filter medium. The method includes the step of concentrating first particles of a first solid by removing a fluid stream through a filter medium in a filter. At least some of the first particles become blocking particles that block pores of the filter medium. The method also includes the step of inserting second particles of a second solid into the filter. These second particles scrape, vibrate, agglomerate, or a combination thereof along the filter medium, thus dislodging at least a portion of the blocking particles.