Self-Cleaning Filter Rotor Driven by Filtrate Impact Force
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Solution Overview
Problem
Existing filter devices for aqueous liquids containing solid particles, such as grinding liquids from opticians' shops, require frequent and labor-intensive manual replacement of filter materials and do not effectively separate plastic particles due to density differences, leading to environmental concerns and increased operational costs.
Innovation Solution
A filter device with a hollow cylindrical filter element and a rotatable rotor for backwashing, using filtrate under pressure to drive the rotor and remove solid particles from the outside of the filter element, eliminating the need for manual filter changes and consumables, and featuring a sieve-like filter fabric held by a cylindrical cage for extended service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual replacement of filter material is used, then filter function is maintained, but operational time and labor costs increase
Solution Approach 1:
The filter element performs self-cleaning through automated backwashing. Pressurized cleaning liquid is supplied to the filter element through distribution channels, and the rotor rotates to direct jets of cleaning liquid onto the filter surface, removing captured particles automatically without manual intervention.
Solution Approach 2:
The backwashing process operates periodically rather than continuously. The rotor rotates to different positions, alternating between filtration mode and backwashing mode, allowing the filter to accumulate particles during filtration periods and then self-clean during backwashing periods.
2Reliability
If traditional filtration is used, then solid particles are separated, but filter material requires frequent replacement
Solution Approach 1:
The filter element automatically removes captured particles through backwashing, preventing clogging and extending service life. The self-cleaning mechanism restores filtration capacity without requiring manual replacement of filter material.
Solution Approach 2:
Instead of discarding the entire filter element when it becomes clogged, the system recovers the filter material by automatically removing accumulated particles through backwashing, allowing repeated use of the same filter element.
3Quantity of substance
If centrifuge is used for separation, then glass particles are removed, but plastic particles remain in wastewater
Solution Approach 1:
The filter element is designed with a porous structure that extracts and retains both glass and plastic particles from the grinding fluid. The porous walls capture particles of different densities and compositions, removing them from the liquid stream completely rather than relying on density-based separation alone.
Solution Approach 2:
The filter element combines a porous structure with appropriate pore size and surface properties to effectively capture different types of particles (glass and plastic) that have different densities and characteristics, achieving comprehensive separation that a single-density centrifuge cannot accomplish.
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 automated self-cleaning of the filter without a rotor drive, reducing operational time and costs, and effectively separates both glass and plastic particles, preventing their discharge into wastewater and extending the filter's service life.
Implementation Method 1
spray the filtrate from the outside of the filter element against the inside of the filter element during rotation of the rotor to remove solid particles
Implementation Method 2
a filter material held by a cylindrical filter cage, which is formed by a tubularly curved flat filter fabric whose adjacent edges overlap
Data Source
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AI summary
The invention relates to a filter (14) and a filter device (10) for filtering an aqueous liquid containing solid particles, in particular a grinding fluid produced during lens grinding in optician shops. According to the invention, the filter (14) comprises a hollow cylindrical filter element (24) through which the liquid flows from the outside to the inside during filtration, and a rotatable rotor (60) arranged inside the filter element (24) and provided with rinsing openings (88) for backflushing the filter element (24), wherein filtrate can be supplied under pressure to the rotor (60) in order to hydraulically drive the rotor (60) by means of the filtrate exiting the rinsing openings (88) and to spray the filtrate from the outside of the filter element (24) against the inside of the filter element (24) during the rotation of the rotor (60) to remove solid particles.