Self-Cleaning Filtration Screen With Reciprocating Wiper
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Solution Overview
Problem
Current filtration and dewatering technologies require frequent cleaning, use of flocculants that degrade products, and disposable filtering media, leading to inefficiencies and increased costs in processing large volumes of juices and effluent.
Innovation Solution
A filtration apparatus with a fine mesh screen and rotary valve system that includes a wiping member to continuously remove residue through controlled orifices, minimizing the need for flocculants and disposable media, and enabling continuous operation with efficient pressure management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fine mesh or screen filters are used to separate small solid particles from fluids, then filtration precision is improved, but the frequency of cleaning required increases due to high solid content in the fluid
Solution Approach 1:
The filtering element performs self-cleaning through a reciprocating wiping member that mechanically removes accumulated residue from the screen surface. The system uses the fluid pressure differential across the filter to drive the wiping action, enabling the filter to clean itself without external intervention or shutdown, thus maintaining high filtration precision while ensuring continuous operation
Solution Approach 2:
The wiping member operates continuously or periodically to remove residue from the filtering element surface, preventing clogging and maintaining constant filtration efficiency. This continuous cleaning action ensures the filtering process can proceed without interruption, resolving the contradiction between maintaining precision and ensuring productivity
2Productivity
If flocculants are used to handle high solid content fluids, then dewatering efficiency is improved, but product quality deteriorates and additional waste disposal problems are created
Solution Approach 1:
The system replaces chemical flocculants with a mechanical cleaning mechanism consisting of a reciprocating wiping member that physically removes residue from the filter surface. This mechanical substitution eliminates the need for chemical additives, maintaining product quality while achieving effective dewatering through continuous mechanical residue removal
Solution Approach 2:
The invention uses a reusable filtering element with a self-cleaning mechanism instead of disposable filtration media or chemical flocculants. The wiping member continuously restores the filter surface, extending its service life and eliminating the need for frequent replacement or chemical intervention, thus avoiding product contamination and waste disposal issues
3Manufacturing precision
If large quantities of juice are stored for settling, then solid separation is improved, but storage costs and energy consumption increase
Solution Approach 1:
The system replaces the natural settling process that requires extended storage and chilling with a mechanical filtration system. The reciprocating wiping member continuously removes residue from the filter surface, maintaining constant filtration efficiency without requiring prolonged storage or energy-intensive chilling, thus achieving solid separation while eliminating storage costs and energy consumption
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 apparatus effectively filters large volumes of fluids with high solid content continuously, reducing the need for frequent cleaning and disposable media, while maintaining pressure and improving the quality of the filtered product.
Implementation Method 1
a filtering element (23) which is situated within the filtering chamber (12)
Implementation Method 2
a wiping member (25) situated within the filtering element (23), and the wiping member (25) is adapted to wipe the internal surface of the filtering element (23)
Implementation Method 3
The residue outlet (21) includes one or more restrictor orifices (41) that are sized to allow residue to exit through the or each orifice while maintaining a pressure within the filtering chamber
Data Source
Figure 1
Figure 2~2b
Figure 3~3a
AI summary
A filtration apparatus which has a filtration chamber, and the filtration chamber has a fluid inlet, a filtered fluid outlet, a residue outlet, and a filtering element. The filtering element is situated between the fluid inlet and the filtered fluid outlet. The apparatus also includes a wiping member which is situated within, or about, the filtering element and which is adapted to wipe the surface of the filtering element. The wiping member also wipes any residue toward the residue outlet when the apparatus is in use. The filtration apparatus includes a first pumping means configured to create a flow toward the filtering chamber, and a second pumping means situated within the filtering chamber and configured to induce a counter-flow back toward the first pumping means.