Pulper Screening Sheet with Variable Aperture Zones
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Solution Overview
Problem
Existing pulpers require coordination of operation or multiple screen plates with different hole shapes and sizes based on material type, water/solids ratio, and processing method, limiting flexibility and efficiency.
Innovation Solution
A high-density pulper with a screen and displacement spiral, featuring screen areas connected in parallel with closable exits, allowing for control over which areas and types of openings material passes through, using varying hole sizes and shapes, including round bores, slits, and different geometries, and incorporating grinding bodies and adjustable flow rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single screen plate with uniform hole size is used, then the device structure is simple, but the adaptability to different materials and processing requirements is poor
Solution Approach 1:
The screen plate is divided into multiple areas with different hole sizes and shapes. Each area is designed to handle specific material fractions or processing requirements, allowing the single screen plate to perform multiple functions that would otherwise require multiple separate screens.
Solution Approach 2:
Different regions of the screen plate are equipped with locally optimized hole characteristics (size, shape, distribution) suited for specific processing needs. For example, certain areas have larger holes for coarse separation while other areas have smaller holes for fine separation, enabling localized optimization for different material types.
2Manufacturing precision
If multiple screen plates with different hole sizes are used, then the separating performance is improved, but the device complexity and operation coordination increase
Solution Approach 1:
Instead of using multiple separate screen plates that require coordination, the invention segments the single screen plate into functional areas. This maintains the separation performance of multiple screens while eliminating the complexity of coordinating multiple independent components.
Solution Approach 2:
Multiple screen functions are merged into a single screen plate structure. The different hole-sized areas work simultaneously within one plate, combining the separating capabilities of what would traditionally require multiple coordinated screens into one unified component.
3Manufacturing precision
If different screen plates are prepared for different materials, then the processing quality is improved, but the device complexity and inventory requirements increase
Solution Approach 1:
The screen plate is designed as a universal component that can handle multiple material types and processing requirements simultaneously. By incorporating various hole sizes and shapes in different areas, a single screen plate replaces the need for multiple specialized screens, improving both processing quality and operational flexibility.
Solution Approach 2:
The screen plate provides dynamic adaptability through its multi-functional design, allowing it to respond to different material characteristics without requiring physical changes or replacements. The various hole configurations enable the same screen to adapt to different processing conditions and material types.
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
Enhances separating performance, enables removal of distinct material fractions, and allows for flexible operation by varying flow rates and screen qualities, improving processing efficiency and quality.
Implementation Method 1
a displacement spiral (24), the screen (19) having areas (20, 21) with openings with different opening sizes
Data Source
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AI summary
The aim of the invention is to be able to use an individual pulper and to be able to remove fibrous material from the pulper in an optimum manner. In order to do this, the screening sheet of a pulper comprises openings which are disposed in various regions and have different sizes. One advantage is that said regions are concentric to each other.