Fermenter Scraper Curved Edge Resolving Tangle Formation
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Solution Overview
Problem
Existing scrapers for fermenters face issues with tangle formation due to fibrous materials and plastic parts, leading to inefficient discharge of cleared material, especially when there are significant density differences and knot formation in the tank.
Innovation Solution
A scraper with a curved clearing edge that rotates around a central axis, designed to convey cleared material efficiently and prevent tangle formation, featuring a logarithmic spiral curvature and a catching device to ensure reliable discharge, along with a suction device and gravity separator for effective material handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If lamellae are used to transport suspended matter, then discharge of cleared material is achieved, but tangle formation occurs due to fibrous materials and plastic parts
Solution Approach 1:
The scraper uses a curved clearing edge instead of straight lamellae. The curvature allows the clearing edge to continuously push material along its path without creating sharp corners or edges where fibrous materials and plastic parts can get tangled. The rounded profile smoothly guides material flow while reducing knot formation.
Solution Approach 2:
The scraper employs a rotating clearing device with a curved clearing edge that dynamically adapts to the material flow. The rotation creates continuous motion that prevents material from settling and tangling, while the curved edge dynamically pushes material along the rotational path, maintaining productivity without the static limitations of fixed lamellae.
2Reliability
If a curved clearing edge is used, then tangle formation is reduced, but device complexity increases
Solution Approach 1:
The curved clearing edge is implemented as a simple rotational component with a continuous curved profile. This geometric simplification, while appearing complex, actually reduces the number of discrete parts needed compared to multiple straight lamellae, making the overall device simpler despite the curved geometry.
Solution Approach 2:
The curved clearing edge serves multiple functions simultaneously: it pushes material, guides flow, prevents tangling, and self-cleans during rotation. This multi-functionality consolidates what would otherwise require multiple separate components, reducing overall device complexity while achieving reliable tangle-free operation.
3Productivity
If standard scrapers are used for dense suspended matter, then discharge is achieved, but efficiency decreases when density difference to environment is high
Solution Approach 1:
The curved clearing edge creates a smooth, continuous pushing surface that efficiently moves dense suspended matter without creating turbulence or requiring excessive force. The curved profile distributes the pushing force evenly along the material bed, reducing energy consumption compared to sharp-edged or segmented scrapers that create turbulence and require higher power input.
Solution Approach 2:
The scraper design changes the geometric parameters of the clearing edge to optimize for high-density material handling. The specific curvature radius and edge profile are optimized to minimize resistance when pushing dense suspended matter, improving energy efficiency while maintaining high discharge productivity.
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 curved scraper design ensures continuous and efficient discharge of cleared material, reducing tangle formation and allowing for reliable conveyance of suspended matter to an ejection area, while the suction and gravity separator systems facilitate efficient separation and reuse of organic material, enhancing biogas production.
Implementation Method 1
A scraper with a curved clearing edge that rotates around a central axis, designed to convey cleared material efficiently
Implementation Method 2
the curved scraper design ensures continuous and efficient discharge of cleared material, reducing tangle formation and allowing for reliable conveyance of suspended matter to an ejection area
Implementation Method 3
the suction and gravity separator systems facilitate efficient separation and reuse of organic material
Data Source
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AI summary
The invention relates to a scraper (1) for a fermenter for conveying scraped material (5), in particular settling substances, to an ejection region (4), wherein the scraper has a scraping device (10), which extends from a shaft (100) that can be arranged at the center of the fermenter, wherein the scraping device (10) has a scraping edge (14) that is curved in a plane perpendicular to the shaft (100).