Segmented Kiln Platform for Asbestos Waste Thermal Treatment
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Solution Overview
Problem
Existing methods for processing asbestos-containing waste products face challenges in reliably heating and safely removing the treated products due to the thermal expansion and contraction of single-piece platforms, which can lead to damage during heat treatment.
Innovation Solution
A platform composed of separate heat-resistant elements that can expand and shrink, supported by a mobile carrier, allowing for stable engagement and tilting, and featuring pin-shaped protrusions for secure assembly, enables reliable heat treatment and safe product removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-piece platform is used for heating asbestos-containing waste, then the platform structure is simple, but the platform is susceptible to damage during heat treatment due to thermal expansion and contraction
Solution Approach 1:
The platform is divided into multiple separate heat-resistant elements (blocks) that can independently expand and contract during thermal cycles. These segmented blocks are arranged in a matrix pattern and connected through engagement features, allowing each element to accommodate thermal stress without compromising the overall platform structure.
2Reliability
If separate heat-resistant elements are used in the platform, then the platform can expand and shrink during heating and cooling, but the elements need to be engaged together before tilting which increases operational complexity
Solution Approach 1:
The system automatically engages the separate heat-resistant elements together before the tilting operation is required. Engagement features such as protrusions and recesses, or mechanical fasteners, are activated in advance to secure the modular blocks in their proper positions, ensuring the platform is ready for safe tilting without requiring manual assembly operations at the moment of discharge.
3Productivity
If the platform is tilted to remove the treated product, then product removal is effective, but the platform may be damaged if not properly constructed
Solution Approach 1:
The platform uses segmented heat-resistant blocks that can independently accommodate thermal stress during the heating cycle and maintain structural integrity during the tilting operation for product removal.
Solution Approach 2:
The modular elements are automatically engaged and secured together before the tilting operation begins, ensuring the platform structure is prepared in advance to withstand the mechanical stresses of tilting and product discharge.
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 solution minimizes the risk of platform damage during heat treatment, ensuring efficient processing and safe handling of asbestos-free products, which can be further pulverized for reuse in the cement industry.
Implementation Method 1
The separate heat resistant elements allow the platform to expand and shrink during heating and cooling down to a great extent, respectively
Implementation Method 2
During a predetermined residence time the waste product is exposed to a temperature of about 600-1000 ° C. As a consequence, the asbestos fibers contained in the asbestos-containing waste product are dehydrated.
Data Source
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AI summary
A method for heating an asbestos-containing waste product and removing the resulting safe product comprises the steps of placing an asbestos-containing waste product on a platform, transporting the platform including the product into a kiln, heating the platform including the product, removing the product from the platform after heating by tilting the platform, wherein the platform comprises separate heat-resistant elements which are engaged together before tilting the platform.