Asphalt Shingle Recycling System with Temperature Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing asphalt shingle recycling processes struggle with regulating the consistency of the asphalt pavement composition and generate detrimental air emissions.
Innovation Solution
A system and method involving heat treatment of scrap asphalt shingles in a processor with a heat source, such as heated oil, to produce a consistent hot solid or liquefied slurry, which is then processed to form a final recycled product, reducing air emissions and improving composition consistency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If existing recycling processes are used to incorporate shredded asphalt roofing shingles into asphalt pavement composition, then cost is reduced by substituting expensive liquid asphalt cement, but the consistency of the asphalt pavement composition cannot be regulated and air emissions are detrimental
Solution Approach 1:
The patent applies parameter changes by controlling the temperature of the asphalt shingles during processing. The shingles are heated to a specific temperature range (200-650°F, preferably around 350°F) to achieve proper liquefaction and mixing consistency. This temperature parameter control enables regulation of the final asphalt pavement composition consistency while maintaining the cost benefit of using recycled shingles.
Solution Approach 2:
The patent implements feedback mechanisms through temperature monitoring and control systems in the processing equipment. Temperature sensors monitor the shingle temperature throughout the processing cycle, and the system adjusts heating parameters accordingly to maintain optimal processing conditions and achieve consistent composition in the final product.
2Quantity of substance
If existing recycling processes are used to incorporate shredded asphalt roofing shingles into asphalt pavement composition, then cost is reduced by substituting expensive liquid asphalt cement, but air emissions are detrimental to the atmosphere
Solution Approach 1:
The patent employs an inert atmosphere approach by conducting the asphalt shingle processing in a closed system with controlled atmosphere. The processing chamber is designed to minimize air exposure, and the heated shingles are processed in a controlled environment that prevents harmful air emissions while maintaining the economic benefit of using recycled materials.
Solution Approach 2:
The patent converts the potential harmful air emissions into a benefit by controlling the thermal processing to melt and incorporate the shingles into the asphalt mixture. The heat treatment that could generate emissions is instead used to achieve proper mixing and consistency, with the processed material being incorporated into the pavement composition rather than released into the atmosphere.
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 method achieves a high degree of consistency in the recycled product and significantly reduces air emissions, providing a more environmentally friendly and effective recycling process.
Implementation Method 1
Heat energy is transferred from the heat source to the asphalt roofing material until the asphalt roofing material forms a hot solid or a liquefied slurry
Implementation Method 2
The asphalt roofing material is heated to a temperature in the range from 200 degrees Fahrenheit to 650 degrees Fahrenheit, preferably to about 350 degrees Fahrenheit within the treatment chamber
Data Source
AI summary
The asphalt roofing material is delivered into a treatment chamber of a processor. Hot oil is passed through a jacket surrounding the treatment chamber. Heated asphalt forms a hot solid and/or a liquefied slurry. The hot solid and/or the liquefied slurry is then removed from the treatment chamber. The asphalt roofing material in the treatment chamber can be agitated to promote mixing. The asphalt is heated to a temperature in the range from 200 degrees Fahrenheit to 650 degrees Fahrenheit within the treatment chamber. The solid and/or liquefied slurry is milled after it has been removed from the treatment chamber. The solid and/or the liquefied slurry is cooled after it exits the treatment chamber, preferably to a temperature in the range of approximately 90 degrees Fahrenheit to 110 degrees Fahrenheit. The hot solid and/or the liquefied slurry is passed through a hammer mill after the hot solid and/or the liquefied slurry exits the treatment chamber to reduce the particle size of the solid particles.