Bernoulli Filter Pressure Maintenance for Fine-Pore Cleaning
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Solution Overview
Problem
Existing filtering apparatuses, particularly Bernoulli filters, are inadequate in cleaning filter elements with pore sizes less than 100 μm, leading to limited filtration capability and reduced service life.
Innovation Solution
A pressure maintenance unit is integrated into the outlet port of the filtering apparatus to maintain a defined minimum pressure during cleaning, creating a pressure difference that enhances the cleaning efficacy of filter elements, allowing for the use of finer pore sizes by inducing a backflushing effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If filter elements with smaller pore sizes are used to increase filtration grade, then filtration efficiency is improved, but cleaning effectiveness deteriorates because residues cannot be removed properly
Solution Approach 1:
The patent applies reverse flushing by reversing the normal flow direction during cleaning. The flushing flow is directed from the outer side to the inner side of the filter element, opposite to the normal filtration direction. This inversion creates a backflushing effect that effectively removes residues from fine-pore filters without damaging the filter structure, resolving the contradiction between using small pore sizes and maintaining cleaning effectiveness
Solution Approach 2:
The patent changes the flow direction parameter during cleaning operation. By reversing the flow direction from inner-to-outer (filtration mode) to outer-to-inner (cleaning mode), and controlling the flushing flow rate to be higher than normal operation, the system achieves effective cleaning of fine-pore filters. This parameter change enables the use of smaller pore sizes while maintaining reliable cleaning capability
2Reliability
If flushing flow rate is increased to improve cleaning effectiveness, then residue removal is enhanced, but energy consumption increases
Solution Approach 1:
The patent implements periodic cleaning cycles rather than continuous high-flow operation. The filter operates in normal filtration mode during production, then switches to cleaning mode with reversed flow direction and higher flushing rate only when needed. This periodic action reduces overall energy consumption while maintaining effective cleaning capability when required
Solution Approach 2:
The system changes flow rate parameters only during cleaning cycles, not during normal operation. By maintaining normal flow rates during filtration and only increasing to high flushing rates during periodic cleaning, the patent achieves effective residue removal while minimizing energy consumption during the majority of operating time
3Duration of action of stationary object
If filter elements are cleaned more frequently to extend service life, then operational reliability is improved, but productivity decreases due to more frequent cleaning interruptions
Solution Approach 1:
The patent implements self-cleaning capability where the filter element cleans itself during periodic reverse flushing operations. The high-velocity flushing flow removes residues automatically without requiring manual intervention or disassembly. This self-service cleaning extends filter service life and reduces maintenance downtime, thereby maintaining high productivity
Solution Approach 2:
The system performs cleaning operations periodically based on accumulated residue levels or operating time, rather than after every cycle. This periodic maintenance approach allows the filter to operate at full productivity for extended periods, with brief cleaning interruptions that minimize overall impact on throughput while extending service life
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 effective cleaning of filter elements with pore sizes less than 100 μm, extending their service life and improving filtration efficiency.
Implementation Method 1
a pressure maintenance unit (46) for maintaining a defined minimum pressure in the housing (12) during cleaning
Implementation Method 2
Due to the cross-sectional narrowing that exists between the cleaning element and the inner side of the filter element, there is a higher flow velocity on the inner side of the filter element
Implementation Method 3
a greater pressure difference is produced between the inner side and the outer side of the filter element, resulting in a kind of backflushing effect
Data Source
AI summary
The invention relates to a filtering apparatus for filtering a fluid, in particular a Bernoulli filtering apparatus, comprising a housing, an inlet port for admitting the fluid to be filtered into the housing, at least one filter element, disposed in the housing, for filtering the fluid, an outlet port for discharging the filtered fluid from the housing, and a filter cleaning mechanism for cleaning the filter element of residues from the filtered fluid, wherein a pressure maintenance unit for maintaining a defined minimum pressure in the housing during cleaning is associated with the outlet port for the filtered fluid on the housing.