Segmented Curved Filter Screen for Batch Centrifuge Durability
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Solution Overview
Problem
Batch centrifuges in sugar processing face frequent filter screen wear and replacement issues due to abrasive sugar crystals and scraper arms, leading to high maintenance costs and inefficiencies, as traditional thin filter screens lack durability and require frequent replacement.
Innovation Solution
A batch centrifuge with a filter screen composed of multiple curved panels that can be easily assembled and disassembled without deformation, featuring coupling features like tongues, grooves, shoulders, and hook-and-loop mechanisms to form a rigid and durable filtration surface that can be inserted through a small opening, reducing the need for heavy mesh backings and facilitating quick replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If thin foils or meshes are used for filter screens, then the filter screen can be folded or collapsed to pass through a small opening, but the filter screen lacks durability and must be replaced more often
Solution Approach 1:
The filter screen is divided into multiple curved panels that can be assembled together to form the complete cylindrical filter screen. Each panel is small enough to pass through the opening individually, but when assembled they create a rigid, durable structure that does not require folding or collapsing.
Solution Approach 2:
The filter screen transitions from a two-dimensional flat or cylindrical structure to a three-dimensional assembled structure of curved panels. This allows the filter screen to maintain rigidity and durability while still being able to pass through the opening by assembling panels in sequence rather than folding a single large structure.
2Reliability
If heavy cylindrical mesh backings are added to support thin filter screens, then additional support is provided, but weight and cost increase and may impede centrifuge functioning
Solution Approach 1:
The filter screen is segmented into multiple curved panels that are self-supporting when assembled in a cylindrical configuration. This eliminates the need for heavy mesh backings to provide structural support, as the segmented panel structure inherently maintains its shape and rigidity through the centrifugal force during operation.
Solution Approach 2:
The filter screen structure utilizes the dynamic conditions during centrifuge operation (rotational speed and centrifugal force) to maintain its shape and provide support. The curved panels are designed to work with the centrifugal force rather than against it, eliminating the need for static heavy support structures.
3Reliability
If thicker, more durable foils and meshes are used for filter screens, then durability is improved, but they cannot be collapsed to fit through the opening in the top of the centrifuge
Solution Approach 1:
The filter screen is divided into multiple curved panels that are small enough to pass through the opening individually. Each panel can be made thick and durable without compromising the ability to install the filter screen, as the panels are assembled in sequence within the centrifuge basket rather than being inserted as a single large structure.
Solution Approach 2:
The filter screen installation process transitions from inserting a single large structure through the opening to assembling multiple smaller panels in three-dimensional space within the centrifuge basket. This allows durable thick panels to be used while maintaining ease of installation through sequential assembly.
4Ease of operation
If traditional thin filter screens are used, then installation is simple, but frequent replacement is required leading to high maintenance costs
Solution Approach 1:
The filter screen is segmented into multiple curved panels that can be quickly assembled and disassembled. This modular structure allows for rapid replacement without requiring complete disassembly of the centrifuge, maintaining ease of operation while significantly reducing replacement frequency due to improved durability of each panel.
Solution Approach 2:
The modular panel design allows for selective replacement of only the worn panels rather than the entire filter screen. This reduces waste and maintenance costs by recovering and retaining panels that are still functional, while only replacing the specific panels that have worn out.
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 solution provides a more durable and efficient filter screen that requires less frequent replacement, reduces operational costs, and improves centrifuge efficiency by allowing for rapid assembly and disassembly without the need for extensive disassembly of the centrifuge.
Implementation Method 1
liquid in the massecuite is forced through a cylindrical filter screen that covers an interior sidewall of the basket while sugar crystals are retained by the filter screen
Implementation Method 2
The basket is then accelerated to a predetermined angular velocity which is maintained for a predetermined spin time. As the basket spins, liquid in the massecuite is forced through a cylindrical filter screen
Data Source
AI summary
A batch centrifuge having a filter screen that can be expeditiously removed and replaced and that is more rigid and more durable than filter screens that are typically employed in current practice. The batch centrifuge may include a centrifuge basket and a cylindrical filter screen disposed within the centrifuge basket, wherein the filter screen is formed of a plurality of curved panels that fit together at adjoining edges. In some embodiments, each of the curved panels may be small enough to fit through an opening in the top of the centrifuge basket without being bent or otherwise deformed.