Optic Fiber Germanium Recovery via Mechanical Crushing
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Solution Overview
Problem
The high cost and environmental concerns associated with recovering germanium from optic fibers, due to the expensive and hazardous processes involved, along with the challenge of disposing of large quantities of optic fibers in landfills where they can entangle machinery, necessitate a cost-effective and waste-reducing method for separating the inner core from the outer cladding.
Innovation Solution
An apparatus and method that uses wheels with blades, anvil wheels, and drive wheels to cut, bend, or crush optic fibers, allowing for the separation of the inner core from the cladding, with the crushed core being processed into a powder for germanium harvesting and the fibers being easily discarded, utilizing vacuum suction and a cyclone separator to separate the components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the acrylic cladding is burned to separate the core and cladding, then the inner core can be separated from the outer cladding, but toxic by-products are produced that are regulated by the EPA
Solution Approach 1:
The patent replaces the chemical/thermal process (burning) with a mechanical process (crushing between rollers) to separate the cladding from the core. The crushing rollers mechanically break apart the optic fiber, allowing separation without combustion, thereby eliminating toxic by-product generation while maintaining effective separation capability
Solution Approach 2:
The patent changes the processing parameters from high-temperature combustion to low-temperature mechanical crushing. By altering the fundamental parameter of temperature and the nature of the process from chemical to mechanical, the separation achieves the same functional result without producing regulated harmful emissions
2Ease of operation
If optic fibers are disposed of in landfills, then disposal is simple, but the fibers can entangle machinery and create hazards
Solution Approach 1:
The patent applies segmentation by crushing the optic fibers into small particles through mechanical rollers. This breaks the long, entangling fiber strands into discrete, manageable particles that cannot wrap around machinery, eliminating the entanglement hazard while maintaining simple disposal procedures
Solution Approach 2:
The patent extracts the hazardous property (entanglement capability) from the optic fibers by mechanically reducing them to particles. By removing the structural integrity that enables entanglement, the material retains its volume for landfill disposal but loses the harmful entanglement characteristic
3Loss of substance
If germanium is recaptured from optic fibers using traditional methods, then germanium can be recovered, but the process is expensive and produces hazardous by-products
Solution Approach 1:
The patent replaces the chemical extraction process with mechanical crushing and sorting. The crushing rollers mechanically break down the fiber structure to liberate germanium-containing particles, which are then sorted using optical sensors and airflow, eliminating the need for chemical reagents that produce hazardous by-products while achieving effective germanium recovery
Solution Approach 2:
The patent introduces an intermediary sorting system using optical sensors and controlled airflow between the crushing process and final collection. This intermediary mechanism selectively separates germanium-containing particles from other crushed material through non-contact forces, enabling pure germanium recovery without chemical processing and associated hazards
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 method enables the cost-effective separation of germanium from optic fibers without producing hazardous waste, facilitates easier disposal of optic fibers by cutting them into manageable segments, and recovers valuable germanium, reducing landfill hazards and increasing the efficiency of waste management.
Implementation Method 1
a cyclone separator to separate the components
Implementation Method 2
The separator can be a cyclone separator
Implementation Method 3
utilizing vacuum suction and a cyclone separator to separate the components
Data Source
AI summary
A method for processing strands of optic fiber in which a box containing one or more pairs of wheels either crush, cut or bend and break the strands of optic fiber before being transported to a separator. The separator can be positioned to deposit material onto a conveyor belt, into a storage container or into a separate structure known as a step-cleaner. The box can contain a pair of cutting and anvil wheels, a pair of drive wheels or a pair of wheels featuring teeth that cut, crush or bend the strands of optic fiber prior to a suction force removing them from the box and transporting them to the separator. A step cleaner contains one or more rotating wheels with tines that agitate and move the cut, broken or crushed fibers. The suction force is created by a blower operably connected to a passage that communicates with the separator.