Rotary Filter Device with Diametrically Opposed Chambers
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Solution Overview
Problem
Existing filtering devices face challenges in increasing flow capacity and reducing fluid dwell time, particularly when processing sensitive fluids that can react chemically and pose explosion risks, such as textile pulp, due to limited filter surface area and potential for fluid stagnation.
Innovation Solution
The design features pairs of filter chambers arranged diametrically opposite on the filter support element with intermediate channels of varying lengths, allowing for balanced fluid flow and pressure distribution, enabling continuous filtration with 50-75% of the filter surface remaining usable during maintenance, and preventing fluid stagnation by ensuring even pressure and flow across the circumference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the filter surface area is increased to raise flow capacity, then the flow capacity increases, but the device size and cost increase considerably
Solution Approach 1:
The filter support element is divided into multiple filter chambers (at least two) that can be independently positioned. This segmentation allows the system to provide large filter surface area through multiple smaller chambers rather than one large chamber, increasing flow capacity while keeping individual chamber sizes manageable and the overall device compact.
Solution Approach 2:
The filter support element is made movable relative to the housing, allowing dynamic repositioning between production position (all filter chambers operational) and maintenance position (one filter chamber accessible for cleaning). This dynamic capability enables the system to maintain high flow capacity during production while allowing maintenance without permanently reducing operational surface area.
2Ease of repair
If the filter support element is shifted to maintenance position to clean the filter chamber, then the filter can be cleaned, but the filter surface area available for filtration is reduced
Solution Approach 1:
The filter support element is divided into multiple filter chambers that can be independently accessed. When one chamber is in maintenance position for cleaning, the other chamber(s) remain in production position and continue to filter fluid, maintaining partial productivity during maintenance operations.
Solution Approach 2:
The system is designed so that while one filter chamber is being maintained, the other chamber(s) continue to perform filtration functions. This continuity ensures that the useful action of fluid filtration does not completely stop during maintenance, maintaining at least partial productivity.
3Stress or pressure
If the filter support element is pressed to one side by dynamic pressure, then the filter chamber opening is blocked, but this prevents proper fluid flow
Solution Approach 1:
The inlet and outlet channels are positioned asymmetrically relative to the filter support element, with inlet channels on one side and outlet channels on the opposite side. This asymmetric arrangement creates a balanced pressure distribution that prevents the filter support element from being pressed to one side, ensuring proper fluid flow through all filter chambers.
Solution Approach 2:
The channel arrangement is designed to create equipotential pressure distribution across the filter support element. By positioning inlet and outlet channels strategically, the system ensures that pressure is evenly distributed, preventing localized pressure buildup that would otherwise push the filter support element to one side and block the chamber opening.
4Loss of time
If fluid residues stagnate locally for longer times, then chemical reactions may occur, but this creates explosion risks with certain fluids
Solution Approach 1:
The filter system is divided into multiple separate filter chambers that are independently positioned and flowed through. This segmentation ensures that fluid does not stagnate in any single chamber for extended periods, as fluid continuously circulates through all chambers during operation, thereby preventing the chemical reactions that could lead to explosion risks.
Solution Approach 2:
The system maintains continuous fluid flow through all filter chambers during operation, preventing stagnation. The continuous circulation of fluid ensures that residence time in each chamber remains short, eliminating the conditions necessary for dangerous chemical reactions to occur with sensitive fluids like textile pulp.
Data Source
AI summary
The invention relates to a filtering device (100) comprising: a filter support element (10) which is movably mounted in the housing (30), which has the shape of a cylindrical bolt, and which has multiple filter chambers (11.1, 11.2; 12.1, 12.2), a filtering element being arranged in each said filter chamber; and an inlet channel (31.1, 31.2 32.1, 32.2) and an outlet channel (41.1, 41.2; 42 0.1, 42.2) in the housing (30), wherein the inlet channel and the outlet channel are each to be connected to at least one filter chamber in a production position. The aim of the invention is to increase the effective filtering surface. This is achieved in that at least two pairs of filter chambers are provided on the filter support element. The filter chambers of each pair are arranged on the filter support element in a diametrically opposed manner, and there are no connections between the filter chambers within the filter support element. At least one respective intermediate channel (13.1, 13.2, 14.1, 14.2) that extends in the direction of the longitudinal axis (19) of the filter support element (10) is provided between the outlet channels in the housing and the filter chambers. Intermediate channels of different lengths are provided for each pair of filter chambers.