Composite Drum Filter Corrosion Resistance
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Solution Overview
Problem
Conventional drum filter devices face challenges in resisting corrosion, which can lead to leaks and reduced service life, especially when used in corrosive industrial applications.
Innovation Solution
A vacuum and/or pressure drum filter device design featuring a rotatable filter drum with a rigid inner base body and a corrosion-resistant outer functional body that forms a fluid-tight encapsulation, preventing external fluids from reaching the inner base body and supporting external forces, while allowing for easy leak testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional single-material filter drum is used, then the device is simpler to manufacture, but it has poor corrosion resistance and reduced service life
Solution Approach 1:
The filter drum is constructed as a composite structure with an inner base body made of rigid material (e.g., metal or rigid plastic) providing mechanical strength, and an outer functional body made of corrosion-resistant material (e.g., fluoropolymer or other corrosion-resistant plastic) that is fluid-tight. This composite construction allows the device to simultaneously achieve high corrosion resistance and structural integrity, resolving the contradiction between reliability and manufacturing simplicity.
2Duration of action of stationary object
If the inner base body is directly exposed to external fluids, then the structure is simpler, but leaks and corrosion occur reducing service life
Solution Approach 1:
The inner base body is nested within the outer functional body, creating a protective enclosure. The outer functional body is fluid-tight and prevents external corrosive fluids from reaching the inner base body, while the inner base body provides structural support. This nested configuration extends service life by protecting against corrosion while maintaining a relatively simple integrated structure.
3Reliability
If the outer functional body is made of corrosion-resistant material, then corrosion resistance is improved, but the body becomes less stable under external forces
Solution Approach 1:
The composite structure combines an inner base body made of rigid material with high compressive strength to bear external forces, and an outer functional body made of corrosion-resistant material to protect against chemical corrosion. The inner base body acts as a structural core that provides mechanical stability, while the outer layer provides chemical protection, allowing each material to perform its optimal function.
4Ease of manufacture
If the filter drum structure is simplified, then manufacturing is easier, but leak detection becomes difficult
Solution Approach 1:
The nested structure of the inner base body within the outer functional body creates distinct, separable components that can be individually manufactured and assembled. This modular nested design simplifies manufacturing while enabling straightforward leak detection by pressurizing the enclosed space between the inner and outer bodies and monitoring for pressure changes that would indicate leaks through the outer functional body.
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 design enhances corrosion resistance, extends the service life by quickly detecting leaks, and ensures the integrity of the filtration process in corrosive environments.
Implementation Method 1
a drum-shaped outer functional body made of an at least largely rigid functional body material and which surrounds the inner base body (outside) in a way that forms a fluid-tight encapsulation of the inner base body (outside)
Implementation Method 2
The inner base body can, for example, have stability against compressive forces and serve as a support body for the outer functional body, whereby external forces acting on the outer functional body are (at least) largely borne or transferred by the inner functional body
Implementation Method 3
The filter drum can, for example, be rotatable, and the vacuum and/or pressure drum filter device can include a drive mechanism for rotating the filter drum
Implementation Method 4
The suspension to be filtered is fed to the filter cells from outside the filter drum. The filtrate passes through a filter medium and is discharged to the filtrate tubes, while a filter cake remains in/on the filter cells
Implementation Method 5
The filtrate is discharged via a pressure differential, either by pressurizing the suspension (pressure drum filter device) or by applying a vacuum to the filtrate tubes or filter cells (vacuum drum filter device)
Data Source
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AI summary
A vacuum and/or pressure drum filter device for filtering a solid material from a suspension formed by the solid material and a liquid is disclosed, comprising a filter drum 10, which has a drum-shaped inner base body 30 made of a base body material that is at least mostly rigid and which defines a base body longitudinal axis L, and a drum-shaped outer functional body 50 made of a functional body material that is at least mostly rigid and which surrounds the inner base body 30, wherein the inner base body 30 is surrounded by the outer functional body 50 in a form-fitting manner that is at least mostly in contact with the inner base body 30 and is mostly not adhering to the inner base body 30, such that the outer functional body 50 forms at least mostly an outer lining of the inner base body 30 that is not fluid-tight on the outside of the inner base body 30.and one or more pipes 70 for draining the liquid from the filter drum 10, each of which is attached to the outer functional body 50 and each of which is attached to the inner base body 30 at least mostly only indirectly via the outer functional body 50.