Hollow Filter Sheet Filtration Apparatus Sealing and Segmentation
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Solution Overview
Problem
Filtration apparatuses using hollow filter sheets are prone to failure when damaged, allowing non-filtered liquids to penetrate and fail in filtering turbid water or sludge, while those with hollow fibers are vulnerable to clogging and dirt accumulation.
Innovation Solution
A filtration apparatus with stacked hollow filter sheets and a suction pipe, where a ring-shaped packing seals the gap between the filter sheets and the suction pipe, creating a narrow passage space that blocks filtered objects from entering the suction pipe, even if the filter sheet is damaged, using a spacer with pits and projections to control the passage size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If hollow filter sheets are used to increase filtration area, then filtration capacity is improved, but the system becomes vulnerable to failure when damaged allowing non-filtered liquid penetration
Solution Approach 1:
The hollow filter sheet is divided into multiple independent hollow fibers bundled together. When one fiber is damaged, the others remain functional and can still filter liquid, preventing complete system failure. The suction pipe connects to multiple hollow fibers rather than a single large filter sheet, creating segmented filtration paths.
Solution Approach 2:
The invention changes the structural parameters from a single large hollow filter sheet to multiple smaller hollow fibers with specific diameter ranges (0.5-2.0mm). This parameter change allows the system to maintain high filtration capacity while improving reliability through redundancy - if one fiber is damaged, the others compensate to maintain overall filtration performance.
2Reliability
If hollow fibers are used to improve reliability when damaged, then the system can continue operating, but the hollow fibers are vulnerable to clogging and dirt accumulation
Solution Approach 1:
The invention optimizes the diameter parameter of hollow fibers to 0.5-2.0mm, which is large enough to resist clogging by hair and fibers yet small enough to provide effective filtration. This parameter optimization balances reliability (continued operation when one fiber is damaged) with resistance to harmful factors (clogging and dirt accumulation).
Solution Approach 2:
The filtration system uses composite construction with hollow fibers made from materials resistant to dirt accumulation, combined with a suction pipe structure that facilitates easy cleaning. The composite design integrates multiple material properties to achieve both reliability and resistance to clogging.
3Ease of manufacture
If a single large hollow filter sheet is used, then manufacturing is simpler, but the entire system fails when any part is damaged
Solution Approach 1:
Rather than manufacturing one large hollow filter sheet, the invention segments the filtration function into multiple smaller hollow fibers that can be manufactured independently using conventional techniques. This segmentation maintains ease of manufacture while dramatically improving reliability, as damage to one fiber does not affect the others.
Solution Approach 2:
Multiple independently manufactured hollow fibers are combined into a single filtration assembly that functions as one integrated system. The suction pipe connects to all hollow fibers, merging their individual filtration capacities into a unified high-capacity system that maintains reliability through redundancy.
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 prevents turbid water and sludge from entering the suction pipe, ensuring continuous filtration performance even when the filter sheet is damaged, while maintaining a high filtration capacity and resistance to dirt accumulation.
Implementation Method 1
a ring-shaped packing watertightly sealing a gap between the hollow filter sheet and the suction pipe
Implementation Method 2
a suction pipe extending through the plurality of hollow filter sheets and connected to a hollow portion of each hollow filter sheet, filters liquid by transferring, from the hollow portion of the hollow filter sheet to the suction pipe, liquid penetrating from an outside of the hollow filter sheet to an inside of the hollow portion
Implementation Method 3
A narrow passage space allowing liquid to pass through is provided between the filter and the spacer by pressing the two filters against surfaces of the spacer with the ring-shaped packings and causing the filters to be deformed into a shape according to the surfaces of the spacer
Data Source
AI summary
A plurality of hollow filter sheets have a suction pipe inserted therethrough to be stacked with a ring-shaped packing clamped therebetween. Therefore, a gap between the hollow filter sheet and the suction pipe is watertightly sealed. In the hollow filter sheet, a hollow portion is provided between two filters, and then a spacer with a surface having pits and projections is provided in the hollow portion. A narrow passage space allowing liquid to pass through is provided between the filter and the spacer by pressing the two filters against surfaces of the spacer with the packings and causing the filters to be deformed into a shape according to the surfaces of the spacer. The narrow passage space is smaller than a drainage space between the filters and the spacer that are not clamped by the packings.