Cullet Quality Grading via COPS Code and LOR
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Solution Overview
Problem
The glass industry faces challenges in determining the quality and severity of contamination in cullet, which affects the economic viability and environmental benefits of recycling, due to the lack of systematic methods for assessing contamination in cullet supplies, leading to potential damage to manufacturing equipment and inconsistent pricing.
Innovation Solution
A practical quality index is established using a multidigit coding system (COPS Code) that grades cullet based on color, organic content, porcelain, ceramics, stones, and metal contaminants, allowing for consistent evaluation without specialized laboratory facilities, by taking statistically significant samples from cullet piles and using methods like Loss on Rinsing (LOR) to assess organic content and weight adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If cullet is used in glass manufacturing without systematic quality assessment, then production cost is reduced and environmental benefits are achieved, but contamination risks increase and equipment damage may occur
Solution Approach 1:
The cullet quality assessment is segmented into multiple independent grading parameters (color, organic content, inorganic contaminants, size distribution) that can be evaluated separately and combined to form a comprehensive quality index. This allows systematic assessment without requiring complex integrated systems.
Solution Approach 2:
The patent implements preliminary quality grading of cullet before it enters the glass manufacturing process. By establishing quality indices and grading standards in advance, the system identifies and separates contaminated cullet batches, preventing equipment damage and ensuring consistent production quality.
2Measurement precision
If specialized laboratory facilities are used to assess cullet contamination, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent employs simple visual inspection methods and basic weighing equipment that can be operated without specialized laboratory facilities. The grading system is designed to be self-sufficient, using straightforward procedures like color comparison charts and basic balance scales to achieve reliable contamination assessment.
Solution Approach 2:
The system uses inexpensive, simple testing tools and methods that do not require expensive laboratory equipment. The grading cards, color standards, and basic measurement devices are low-cost items that can be readily replaced or updated without significant investment.
3Measurement precision
If comprehensive contamination analysis is performed on all cullet batches, then quality assessment accuracy is improved, but loss of time and productivity decrease
Solution Approach 1:
The patent implements a tiered assessment approach where not all cullet batches receive the same level of detailed analysis. Routine batches undergo quick visual inspection, while only suspicious or borderline cases require more comprehensive testing. This partial action approach maintains high productivity while ensuring adequate quality control.
Solution Approach 2:
The quality assessment process is segmented into rapid preliminary screening and detailed follow-up analysis. The segmentation allows most batches to be processed quickly through the screening stage, with only a small fraction requiring time-consuming detailed examination, thus maintaining overall productivity.
4Ease of operation
If cullet pricing is based on weight alone, then ease of operation is improved, but loss of information regarding quality and contamination severity occurs
Solution Approach 1:
The pricing system is segmented into base weight-based pricing and quality-based adjustment factors. The weight component provides the simple foundation for calculation, while separate quality grades for different contaminant types add informational value without significantly complicating the overall pricing structure.
Solution Approach 2:
The quality index system serves multiple functions simultaneously: it provides detailed contamination information for quality control, enables differentiated pricing strategies, and guides cullet sorting and processing decisions. This multi-functionality ensures that the additional information gathered does not represent a loss but rather creates multiple valuable applications.
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 consistent grading of cullet quality, reducing contamination-related risks and costs, ensuring the economic viability of recycling while maintaining environmental benefits by providing a standardized assessment of cullet quality across the supply chain.
Implementation Method 1
using methods like Loss on Rinsing (LOR) to assess organic content and weight adjustments
Data Source
AI summary
A method for grading the quality of cullet. Some embodiments include methods for generating a statistically significant sample of material from a collection of cullet contaminated with waste. Other embodiments include methods for evaluating various qualities of the sample with relatively simple techniques. Yet other embodiments include a uniform and reasonably simple method for communicating the results of the evaluation among different parties.