Modular Screen Modules for Dust Explosion Safety
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Solution Overview
Problem
Current screens used in chipboard factories for screening wood-based raw materials after chipping and drying are large, expensive to manufacture, difficult to transport, and lack effective solutions for managing dust explosions, particularly in the lower sections of double-layered screens.
Innovation Solution
A modular screen design with a frame part and multiple screen modules, each equipped with explosion hatches or burst discs for controlled pressure release and a flame extinguisher, allowing for safer and more economical assembly, maintenance, and reduced risks from dust explosions, while enabling compact and efficient transportation in standard-sized containers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large steel structure screen is used for screening wood-based raw materials, then the screening capacity is sufficient, but the manufacturing cost increases and transportation becomes expensive
Solution Approach 1:
The screen is divided into multiple screen modules (first screen module, second screen module, third screen module) that can be assembled together. Each module contains smaller steel structures that are easier and cheaper to manufacture individually, yet when combined they provide the necessary large-scale screening capacity. The frame modules also serve as support structures for multiple screen modules, creating a scalable system.
2Productivity
If a large steel structure screen is used for screening wood-based raw materials, then the screening capacity is sufficient, but transportation cost increases
Solution Approach 1:
The screen system is segmented into transportable modules including first, second, and third screen modules along with frame modules. These modular components can be transported separately and assembled on-site, significantly reducing transportation costs compared to moving a single large steel structure. The standardized modular design allows for efficient packaging and transport logistics.
3Reliability
If explosion hatches are installed in the top part of single-layered screen, then explosion pressure is released in controlled manner, but no solution exists for dust explosion in lower screen section of double-layered screen
Solution Approach 1:
The screen structure is divided into multiple layers with frame modules positioned between screen modules. Each layer can be equipped with explosion hatches independently, allowing controlled pressure release from dust explosions in any specific layer. The frame modules serve as structural supports that can accommodate explosion hatches at various heights, enabling comprehensive explosion management throughout the entire screen assembly.
4Ease of manufacture
If a modular screen design with multiple screen modules is used, then manufacturing cost is reduced and transportation is easier, but the structure becomes more complex
Solution Approach 1:
The frame modules serve multiple functions: they provide structural support for the screen modules, act as explosion containment chambers with explosion hatches, and serve as connection points for the circular motion mechanism. This multi-functionality reduces the need for separate components, simplifying the overall structure despite the modular design. The standardized frame module design can be reused across different screen configurations.
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 modular design reduces manufacturing costs, enhances safety by controlling dust explosions, and allows for easier transportation and installation, minimizing risks and wear, while maintaining efficient screening performance.
Implementation Method 1
a constant centripetal acceleration rotating around an essentially vertical axis gets the material to be screened on top of and through the mesh levels
Implementation Method 2
explosion hatches, via which explosion pressure is released in a controlled manner
Data Source
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AI summary
A screen, preferably making a circular trajectory, for use for example in the wood-working industry, the screen being implemented by means of meshes having different mesh sizes and comprising a number of mesh levels (7) one above another, with which screen wood-based raw material is screened into different-sized fractions, preferably after chipping and drying, which screen comprises a frame part (1) and a moving part (2). The invention is implemented in such a way that the moving part (2) of the screen comprises at least two screen modules (4) and at least one frame module (5).This invention is especially prepared for using material of the wood-working industry and its contamination with dust after the chipping and/or drying. Therefore one of the main issues to be dealt is the prevention of damages due to dust explosions.