Rotatable Feed Wheel for Microwave Hydrocarbon Extraction
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Solution Overview
Problem
Existing processing apparatuses for extracting hydrocarbons from solid materials face issues such as material adherence and vitrification, leading to repeated processing and damage, particularly due to the use of conveyor belts and feed screws, which result in inefficient handling and maintenance challenges.
Innovation Solution
A processing apparatus featuring a rigid, rotatable feed wheel with a scraper mechanism, designed to minimize material adherence and arcing, where the feed wheel is constructed from microwave-transparent materials and shaped to define a channel, allowing for controlled microwave application and efficient material processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conveyor belt is used to carry materials through the processing chamber, then materials can be transported continuously, but materials tend to adhere to the conveyor belt resulting in repeated processing and vitrification
Solution Approach 1:
The patent removes the conveyor belt from the system entirely and replaces it with a feed wheel mechanism. This extraction of the problematic conveyor belt eliminates the adhesion issue while maintaining continuous transport capability through the feed wheel's rotational feeding action.
Solution Approach 2:
The patent replaces the mechanical conveyor belt system with a different mechanical approach using a feed wheel with feed screws. This substitution changes the material handling mechanism from belt-based to wheel-based, preventing adhesion while maintaining continuous operation.
2Productivity
If high power microwaves are applied to process materials, then hydrocarbon extraction efficiency is improved, but arcing occurs leading to damage of the conveyor belt
Solution Approach 1:
The patent extracts the conveyor belt from the system, eliminating the target for microwave-induced arcing. By removing the belt material that is susceptible to arcing damage, the system can operate with high power microwaves without the harmful arcing effects that plagued the conveyor belt system.
3Object-affected harmful factors
If a feed screw arrangement is used to process materials, then arcing is reduced, but materials adhere to the feed screw resulting in excessively long residence time and vitrification
Solution Approach 1:
The patent introduces dynamic elements to the feed wheel system, including adjustable feed screws and a rotatable feed wheel mechanism. This allows the system to dynamically control material feed rate and residence time, preventing the excessive adhesion and prolonged residence time that occur with static feed screw arrangements.
Solution Approach 2:
The feed wheel is divided into multiple segments with individual feed screws, allowing different portions of the wheel to handle materials at different rates. This segmentation enables optimized material flow control, preventing adherence while maintaining continuous processing.
4Ease of operation
If materials are processed repeatedly due to adherence, then handling issues are avoided, but vitrification occurs causing damage to processing chamber components
Solution Approach 1:
The patent extracts the source of repeated adhesion by removing the conveyor belt and redesigning the feed mechanism. This eliminates the root cause of repeated processing cycles, allowing materials to be handled continuously without undergoing vitrification from excessive residence time.
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 reduces the risk of vitrification and damage, enhances handling and processing efficiency, and minimizes maintenance by preventing repeated processing and ensuring contained microwave energy, facilitating the continuous and self-cleaning operation of the apparatus.
Implementation Method 1
The application of the microwaves results in the rapid heating of water carried with the materials, and in the thermal desorption of hydrocarbons from the materials
Implementation Method 2
At least the hub of the feed wheel is conveniently formed from a microwave transparent material such as a suitable plastics and/or ceramic material
Data Source
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AI summary
A processing apparatus is described that comprises a microwave processing chamber (20), a rigid, rotatable feed wheel (16) rotatable about an axis of rotation such that a part of the feed wheel (16) is located within the processing chamber (20), a feed device (26) operable to deposit materials to be processed onto the feed wheel (16), and an output (30) into which processed materials from the feed wheel (16) can be deposited, in use.