Renewable Raw Material Sheet Production via Air Drying
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Solution Overview
Problem
Conventional continuous processes for producing boards from renewable raw materials are energy-intensive due to the need for pressure and heating, leading to high operational costs and environmental impact.
Innovation Solution
A continuous production process that mixes renewable raw materials with a binder and glass beads, applied to a conveyor belt without pressure, allowing for air drying and minimal energy input, with the option to incorporate decorative layers and reinforcements, and recycling waste materials back into the cycle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure and heating are applied to process renewable raw materials into boards, then the boards reach a condition suitable for further processing, but energy consumption becomes very high
Solution Approach 1:
The invention changes the physical parameters of the renewable raw materials through a different mechanism - using mechanical comminution and classification to alter particle size distribution, followed by controlled drying to adjust moisture content. This replaces the conventional thermal and pressure treatment, achieving processability through parameter transformation rather than high-energy heating and pressing.
Solution Approach 2:
The invention substitutes the thermal field (heating) and mechanical pressure field (pressing) with a mechanical field based on comminution and a thermal field based on evaporation/drying. Instead of using high-pressure presses and high-temperature ovens, the process uses mechanical size reduction equipment and controlled evaporation to achieve the desired board conditions.
2Stress or pressure
If large presses are used to compact the starting materials, then the materials are pressurized effectively, but operational costs and maintenance requirements increase significantly
Solution Approach 1:
The invention extracts the compaction function from large, expensive presses and distributes it across multiple smaller mechanical operations - comminution, classification, and forming. By taking out the pressure application step and replacing it with mechanical size reduction and controlled deposition, the process eliminates the need for large pressing equipment while achieving effective material densification.
Solution Approach 2:
The invention segments the compaction process into multiple discrete steps: mechanical comminution to reduce particle size, classification to sort particles by size, and controlled deposition to form the board structure. This segmentation replaces the single-step high-pressure compaction with a multi-stage mechanical process that is more cost-effective and easier to maintain.
3Stability of the object's composition
If thermal treatment is applied to solidify the mixture of renewable raw materials and binders, then the board structure is formed, but high energy consumption is required to operate the thermal treatment devices
Solution Approach 1:
The invention utilizes phase transitions, specifically evaporation and drying, to transform the mixture of renewable raw materials and binders into a stable board structure. By controlling the moisture content through evaporation rather than thermal solidification, the process achieves structural formation with minimal energy input, leveraging the natural phase change of water from liquid to vapor.
Solution Approach 2:
The invention performs preliminary mechanical preparation of the materials - comminution and classification - before the final forming step. This preliminary action prepares the materials to self-assemble into a stable structure through controlled drying, eliminating the need for subsequent high-energy thermal treatment to achieve structural stability.
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 process reduces energy consumption significantly, produces lightweight, fire-resistant panels with improved handling, and enables efficient recycling of waste materials, meeting industry standards and environmental sustainability goals.
Implementation Method 1
The binder can consist of magnesium carbonate, magnesium oxide, magnesium chloride and water so that fire-retardant properties can be achieved
Implementation Method 2
After drying in the air for a long time, this plate is separated with the help of a knife or a saw
Data Source
AI summary
The invention relates to a method for producing a sheet from renewable raw materials. In the method, after mixing a composition to produce a sheet from renewable raw materials, this composition is applied to a conveyor belt. Protruding materials or unevennesses are eliminated with the aid of a device, preferably a simple doctor blade. Without supplying heat, the composition is then subjected to a first drying process on the conveyor belt, before the endless sheet created in this way is cut into sections. The sections are then passed on to final drying in a storage device. After complete drying, regions at the extremities of the sections that have been adversely affected by cutting up the endless sheet are removed from these sections and chopped up into chips. These chips are returned to the further production process in a final method step by feeding them into the composition for producing a sheet from renewable raw materials.