Multistage Screen Sorting Device with Dynamic Fill Level Control
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Solution Overview
Problem
Existing multistage screen sorting devices for cleaning fibrous stock suspensions face inefficiencies due to fluctuations in contaminant content and fibrous stock suspension volume, leading to overloading or underloading of separators and potential clogging or fiber loss.
Innovation Solution
A multistage screen sorting device with a fill level detection system for the second sorting stage, allowing for real-time adjustment of the fibrous stock suspension feed based on accumulation height, thereby optimizing the sorting efficiency and preventing overflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the fibrous stock suspension feed volume is increased to handle high contaminant content, then the productivity increases, but the sorting efficiency deteriorates due to overloading and clogging
Solution Approach 1:
The patent implements dynamic adjustment of the fibrous stock suspension feed volume based on real-time fill level detection in the second sorting stage. The feed volume is varied within a range to maintain optimal sorting efficiency while handling fluctuating contaminant loads, transforming the static feed system into a dynamic one that adapts to changing conditions.
Solution Approach 2:
The patent employs a fill level detection system that provides feedback on the accumulation height in the second sorting stage. This feedback is used to automatically adjust the fibrous stock suspension feed volume, creating a closed-loop control system that prevents overloading and maintains optimal operating conditions despite variations in contaminant content.
2Reliability
If the fibrous stock suspension feed volume is decreased to maintain sorting efficiency, then the reliability improves, but the productivity decreases
Solution Approach 1:
The system dynamically adjusts the feed volume rather than operating at a fixed reduced level. When the second sorting stage has sufficient capacity (lower fill level), the feed volume is increased to maximize productivity. When the fill level rises, the feed volume is decreased to maintain sorting efficiency, thus optimizing both parameters across different operating conditions.
Solution Approach 2:
The patent changes the operating parameter of feed volume within an optimal range based on the fill level detection. By varying this parameter dynamically, the system achieves both high productivity (when feed volume is higher) and high reliability (when feed volume is optimized), rather than being constrained to a fixed compromise value.
3Device complexity
If a compact design with directly connected separators is used, then the device complexity is reduced, but the adaptability deteriorates due to inability to handle fluctuating contaminant compositions
Solution Approach 1:
The compact design is enhanced with a fill level detection system that provides feedback on the state of the second sorting stage. This feedback mechanism enables the compact system to adapt to fluctuating contaminant compositions by dynamically adjusting the feed volume, thus maintaining high adaptability without increasing structural complexity.
Solution Approach 2:
The system performs self-adjustment of the feed volume based on automatic fill level detection, without requiring external control or complex infrastructure. This self-service capability allows the compact design to handle varying contaminant compositions effectively, maintaining adaptability while keeping the device structure simple.
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 fill level detection system enhances the efficiency of the second sorting stage by dynamically adjusting the feed, ensuring optimal operation despite changes in the composition of the fibrous stock suspension, and preventing overflow and fiber loss.
Implementation Method 1
a fill level detection ways for detecting an accumulation height in the second sorting stage is assigned to the second sorting stage
Implementation Method 2
For extraction of heavy dirt, a vortex separator is provided below the inlet of the fibrous stock suspension. The heavy dirt can thus be discharged downwards via this vortex separator.
Implementation Method 3
A centrifugal separator is arranged above the fibrous stock suspension inlet. Accepts that have passed through the screen are removed via an accepts discharge system.
Data Source
AI summary
A screen sorting device for cleaning a fibrous stock suspension includes: an inlet for the fibrous stock suspension; a first sorting stage, which includes a first accepts discharge; at least one second sorting stage, which includes a second accepts discharge; and a fill level detection way, which is configured for detecting an accumulation height in the at least one second sorting stage and is assigned to the at least one second sorting stage.