Filtration Unit With Rotational Backwashing Tool
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Solution Overview
Problem
Conventional filtration devices face challenges in completely removing captured substances from filter elements during backwashing, leading to increased resistance and reduced filtration efficiency, as existing methods often fail to ensure uniform fluid flow and effective rotation of removal tools, resulting in incomplete cleaning and clogging issues.
Innovation Solution
A filtration unit with a hollow tubular filter element and a rotatable captured-substance removal tool, supported by a rotary shaft, where a propeller or blade mechanism at the fluid inlet and outlet ports ensures uniform fluid flow and efficient rotation of the removal tool along the axial direction, effectively removing substances by integrating with the backwashing fluid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If backwashing is performed to remove captured substances from the filter element, then filtration performance is restored, but captured substances may remain incompletely removed leading to increased resistance
Solution Approach 1:
The backwashing fluid itself is utilized to rotate the captured-substance removal tool through the propeller mechanism, eliminating the need for external power sources or complex drive systems. The fluid that performs cleaning also provides the rotational force for the removal tool, creating a self-sustaining system that continuously removes captured substances during backwashing.
Solution Approach 2:
The captured-substance removal tool transitions from a static structure to a dynamically rotating component driven by fluid flow. This dynamic rotation enables the tool to effectively scrape and remove captured substances from the filter element surface, preventing residue accumulation and maintaining low resistance throughout the backwashing process.
2Object-generated harmful factors
If a movable captured-substance removal brush is used in the axial direction, then removal effect is enhanced for elongated filter holes, but the configuration is limited to specific filter hole orientations
Solution Approach 1:
Instead of moving the removal tool axially along the filter element, the invention rotates the removal tool circumferentially around the filter element axis. This rotational approach is the opposite of the conventional axial movement, allowing the tool to effectively contact and remove substances from filter holes regardless of their orientation (elongated axially or circumferentially), thereby increasing versatility.
Solution Approach 2:
The invention changes the dimension of motion from axial (one-dimensional linear movement) to rotational (circumferential movement around the axis). This dimensional change allows the removal tool to access and clean filter holes in any orientation, as the rotational path naturally intersects with both axially and circumferentially oriented holes.
3Speed
If backwashing fluid flows concentrated near the opening end, then rotation of removal tool is achieved, but clogging at the closing end region cannot be eliminated
Solution Approach 1:
The backwashing fluid serves multiple functions simultaneously: it provides rotational force to the removal tool through the propeller while also flowing throughout the entire filter element length to prevent clogging at all regions. The rotational action of the removal tool distributes the fluid flow more evenly, ensuring that even the closing end region receives sufficient flow for effective cleaning.
Solution Approach 2:
The propeller acts as an intermediary that converts the kinetic energy of the backwashing fluid into rotational motion of the removal tool. This intermediary mechanism ensures that the fluid's energy is effectively transferred to drive the removal tool, which then distributes the cleaning action uniformly along the entire filter element length, including regions where direct fluid flow might be insufficient.
4Productivity
If filtration is continued for a long period, then productivity is improved, but resistance against fluid increases making filtration difficult
Solution Approach 1:
The captured-substance removal tool rotates continuously during backwashing, maintaining constant contact with the filter element surface to prevent any residue from remaining. This continuous rotational action ensures that the filter element is thoroughly cleaned with each backwashing cycle, resetting the resistance to low levels and enabling prolonged filtration operation without performance degradation.
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 configuration enables unbiased backwashing, ensuring complete removal of captured substances across the entire filter element length, reducing resistance and improving filtration efficiency by uniformly distributing the backwashing fluid and rotational force, thus preventing clogging and maintaining filter performance.
Implementation Method 1
a blade which is disposed on the fluid inlet and outlet port side inside the filter element and receives the fluid to rotate integrally with the captured-substance removal tool
Implementation Method 2
a captured-substance removal tool which is axially supported by a rotary shaft parallel with the axial direction to be rotatable inside the filter element
Data Source
AI summary
A device is provided that provides an unbiased filtration effect and an effect of removing captured substances through backwashing by causing a fluid to uniformly pass through a filter element over the entire length in an axial direction at the time of backwashing so as to efficiently rotate a captured-substance removal tool in a filtration unit 1 which includes the captured-substance removal tool 20 axially supported inside the tubular filter element 2 to be rotatable.