Extractor Screen Bottom Surface Non-Stick Coating for Plugging Prevention
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Solution Overview
Problem
Screens in solvent extractor systems often become plugged due to fine particulates, reducing extraction efficiency and requiring costly and time-consuming manual cleaning, as existing anti-sticking coatings on top surfaces can chip or contaminate food products and pose safety hazards.
Innovation Solution
A screen configuration with a non-stick coating applied only to the bottom surface, preventing plugging by reducing material buildup while maintaining exposure to shear forces on the top surface, which is left uncoated to prevent chipping and contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a non-stick coating is applied to the top surface of the screen, then screen plugging is reduced, but the coating can chip or contaminate food products and pose safety hazards
Solution Approach 1:
The patent applies non-stick coating selectively only to the bottom surface of the screen, leaving the top surface uncoated. This local differentiation allows the bottom surface to prevent plugging while the top surface remains free of chipping hazards and contamination risks.
Solution Approach 2:
The screen surface is segmented into two distinct zones: a coated bottom surface for plugging prevention and an uncoated top surface for safety. This segmentation resolves the contradiction by assigning different properties to different regions of the same component.
2Reliability
If the extractor is shut down for manual cleaning to restore screen porosity, then extraction efficiency is restored, but production time is lost and cleaning costs increase
Solution Approach 1:
The non-stick coating on the bottom surface enables the screen to resist material buildup and plugging automatically during operation, eliminating the need for frequent shutdowns for manual cleaning. The coated surface self-maintains porosity by preventing fine particulate accumulation.
Solution Approach 2:
The non-stick coating is applied in advance to the bottom surface, creating a protective layer that prevents plugging before it occurs. This preliminary protective action reduces the frequency and necessity of subsequent cleaning operations.
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 significantly extends the operational time between cleanings, reduces cleaning demands, and minimizes contamination risks, enhancing operational efficiency and safety in food processing applications.
Implementation Method 1
the screen includes a non-stick coating applied on the bottom surface of the screen but not on the top surface
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A screen for an extractor system can have a top surface that a solid material contacts during operation of the extractor, a bottom surface opposite the top surface, and a plurality of apertures extending from the top surface through the bottom surface. In one example, the bottom surface of the screen is coated with a non-stick coating while the top surface of the screen is devoid of the non-stick coating.