Polysilicon Crushing and Sorting with Feedback Control
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Solution Overview
Problem
Existing methods for comminuting and sorting polysilicon result in irreproducible size distributions and significant waste, with comminution and sorting processes being decoupled, leading to inefficient production of targeted particle sizes.
Innovation Solution
A device and method that integrates a crushing system with a sorting system, utilizing a controller to adjust crushing and sorting parameters in real-time based on measured parameters, allowing for reproducible polysilicon fractions with defined properties by varying gap distances and rotational speeds of rolls in a multistage crushing system, and using optoelectronic separation for accurate classification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional crushers are used for comminuting polysilicon, then the polysilicon can be crushed, but the size distribution is irreproducible and waste is significant
Solution Approach 1:
The patent implements a feedback control system where the actual particle size distribution is measured and compared to the target distribution, and the crushing parameters are automatically adjusted based on the deviation. This closed-loop control ensures reproducible size distribution and minimizes waste by optimizing the crushing process in real-time.
Solution Approach 2:
The patent makes the crushing parameters dynamic and adjustable during operation. The gap distance between crusher rolls and rotational speeds are varied based on feedback from particle size measurements, allowing the system to adapt to changing conditions and maintain optimal performance for reproducible results.
2Productivity
If comminution and sorting are decoupled processes, then each can be performed independently, but the production of targeted particle sizes is inefficient and waste increases
Solution Approach 1:
The patent merges the comminution and sorting processes into an integrated system where both operations work together in a coordinated manner. The sorting system provides feedback to the crushing system, allowing the two processes to be optimized jointly rather than independently, thereby improving productivity and reducing waste.
Solution Approach 2:
The sorting system measures the actual particle size distribution and provides feedback to the crushing system control. This feedback loop enables the crushing parameters to be adjusted in real-time to produce the desired particle sizes, improving the efficiency of producing targeted particle sizes and reducing waste.
3Manufacturing precision
If manual methods are used for comminuting polysilicon rods, then the process can be performed, but the size distribution is irreproducible and labor intensive
Solution Approach 1:
The patent replaces manual comminution methods with an automated crushing system controlled by a computer. The system automatically adjusts crushing parameters based on feedback from particle size measurements, eliminating manual intervention while ensuring reproducible size distribution through precise control.
Solution Approach 2:
The automated system uses feedback from particle size measurement to automatically adjust crushing parameters, replacing manual trial-and-error adjustment with an automated control loop that ensures reproducible results without manual intervention.
4Adaptability or versatility
If crushing parameters are fixed, then the system is simple to operate, but the production of defined polysilicon fractions with specific properties is difficult
Solution Approach 1:
The patent implements dynamic crushing parameters that can be adjusted during operation based on feedback from particle size measurements. The system allows variable gap distances and rotational speeds to be set and modified, providing the adaptability needed to produce different polysilicon fractions while managing complexity through automated control.
Solution Approach 2:
The system enables changes in crushing parameters such as gap distance and rotational speed to produce different polysilicon fractions with specific properties. The computer control system manages the complexity of multiple adjustable parameters by automating their adjustment based on feedback, making the system both adaptable and manageable.
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
Enables the production of polysilicon fractions with reproducible and defined properties, reducing waste and improving yield by integrating crushing and sorting processes, allowing for fully automated and adjustable comminution without manual intervention.
Implementation Method 1
using optoelectronic separation for accurate classification
Data Source
AI summary
The invention relates to a device for comminuting and sorting polycrystalline silicon, comprising an instrument for feeding a coarse polysilicon fraction into a crushing system, the crushing system associated with a sorting system for classifying the polysilicon fraction, wherein the device is provided with a controller which allows variable adjustment of at least one crushing parameter in the crushing system and/or at least one sorting parameter in the sorting system.