Filter Device Deviation Element Sealing and Flow Control
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Solution Overview
Problem
Existing filter devices experience leaks due to the difficulty in positioning the flexible seal rim of the membrane's edge bead in the filter plate with required tolerance, leading to leakage issues during operation.
Innovation Solution
The deviation element is designed to be flush with the membrane's seal rim in a sealing manner, made of solid plastic, and self-locking, with a spout fitted into the outlet to prevent obstruction and ensure proper flow direction during filtration, washing, and drying, while allowing easy assembly and disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the seal rim of the membrane is made flexible to accommodate positioning tolerances, then ease of assembly is improved, but leakage occurs during operation
Solution Approach 1:
A deviation element is introduced as an intermediary component between the membrane and the outlet. This element has a sealing surface that contacts the membrane's seal rim, providing a reliable seal while accommodating positioning tolerances. The deviation element acts as a mediator that transfers the sealing function from the flexible membrane edge to a more stable intermediate structure.
Solution Approach 2:
The invention changes the physical state of the sealing interface by introducing a rigid deviation element with a sealing surface. This transforms the sealing mechanism from relying on flexible deformation of the membrane edge to a more stable contact between the deviation element's sealing surface and the membrane's seal rim, improving sealing reliability while maintaining ease of assembly.
2Productivity
If the outlet is opened to allow filtrate flow, then filtration efficiency is improved, but the outlet may be obstructed by filter cloth during washing and drying
Solution Approach 1:
The outlet is segmented into multiple outlet slots that are distributed across the outlet surface. This segmentation ensures that even if filter cloth obstructs part of the outlet, other slots remain open to maintain filtrate flow. The deviation element with its spout structure creates multiple flow paths while preventing complete obstruction.
Solution Approach 2:
The deviation element serves as an intermediary structure that guides flow through the outlet slots while preventing direct contact between high-velocity washing medium and the filter cloth. The spout of the deviation element directs the flow along the filter cloth surface, reducing impact and preventing obstruction of the outlet slots.
3Productivity
If washing medium is applied at high velocity to flush filter cake, then cleaning efficiency is improved, but wear on filter cloth increases due to impact from solid particles
Solution Approach 1:
The deviation element acts as a protective intermediary between the washing medium and the filter cloth. The spout of the deviation element directs the washing medium flow along the surface of the filter cloth rather than impacting it directly. This intermediary structure allows high-velocity cleaning while protecting the filter cloth from the erosive impact of solid particles in the washing medium.
Solution Approach 2:
The invention converts the potentially harmful high-velocity flow into a beneficial surface-flow pattern. By directing the washing medium through the spout along the filter cloth surface, the high-velocity flow becomes useful for cleaning while the deviation element prevents the harmful direct impact that would cause wear and tear on the filter cloth.
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 stabilizes the seal rim, prevents leaks, maintains an open outlet cross-section, and reduces wear on the filter cloth, ensuring efficient filtration, washing, and drying processes with reduced fluid usage and shorter process times.
Implementation Method 1
the filtrate flows initially substantially parallel to the filter cloth towards the outlet, is deviated through the deviation element in an outflow direction perpendicular to the filter cloth
Implementation Method 2
a suspension containing a solid substance can be inducted between the filter cloths when the filter device is closed, so that a filtrate penetrates the filter cloths on the chamber side and on the membrane side, while the solid substance is deposited in a filter cake on the filter cloths
Implementation Method 3
the filter cloth, which is pressed onto the membrane on the side of the membrane, does not penetrate the outlet configured at this location during the filtering process
Data Source
AI summary
The invention relates to a filter device comprising at least one filter chamber (7) configured between a chamber side (5) and a membrane side (6) of two parallel filter plates (1) and divided through two filter cloths (4), the membrane sides (6) of the two filter plates (1) each comprising a membrane (3), an outlet (8), and a deviation element (12) attached to the outlet (8) and penetrating the membrane (3). When the filter device is closed, a suspension containing a solid substance can be inducted between the filter cloths (4) in such a way that a filtrate penetrates the filter cloths (4) on the chamber side (5) and on the membrane side (6), while the solid substance is deposited in a filter cake on the filter cloths (4). The filtrate flows initially substantially parallel to the filter cloth (4) towards the outlet (8), is deviated through the deviation element (12) in an outlet direction (9) perpendicular to the filter cloth (4), and flows out through the outlet (8). When the filter device is open, the filter plates (1) are at a distance from each other, so that the filter cloths (4) with the filter cake can be removed from the filter chamber (7). In order to avoid loss of tightness of the filter device, a sealing edge (16) of the deviation element (12) is flush with the membrane in a sealing manner.