Microwave Heating Cavity with Bent Walls and Magnet
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Solution Overview
Problem
Current microwave heating devices for ore products are inefficient due to heterogeneous dispersion of electromagnetic waves, leading to longer heating times and higher operational costs, and they often require large chambers to prevent magnetron burning, which decreases the power-to-area ratio and worsens wave distribution.
Innovation Solution
A microwave heating device with a main cavity featuring walls bent at acute angles and an auxiliary cavity for improved wave reflection, combined with a permanent magnet element to change the wave course, ensuring homogeneous heating and increased power-to-area ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a single chamber with multiple wave-emitting sources is used, then the heating capacity is increased, but the electromagnetic waves are not adequately dispersed leading to heterogeneous heating
Solution Approach 1:
The single chamber is divided into multiple separate chambers, each containing a single wave-emitting source. This segmentation allows each source to be optimally positioned and controlled, improving wave dispersion and heating uniformity while maintaining overall heating capacity through the multiple chambers working in parallel.
Solution Approach 2:
A waveguide system is introduced as an intermediary between the wave-emitting sources and the material to be heated. The waveguide directs and disperses the electromagnetic waves more effectively throughout the chamber, ensuring homogeneous heating distribution and preventing localized overheating.
2Reliability
If the distance between wave-emitting sources is increased to prevent magnetron burning, then the magnetron safety is improved, but the power-to-area ratio decreases
Solution Approach 1:
By dividing the system into multiple separate chambers with single sources each, the design eliminates the need for large distances between sources. Each chamber can be compact, maintaining high power-to-area ratio while ensuring magnetron safety through isolated operation and controlled wave emission.
Solution Approach 2:
The waveguide acts as an intermediary that allows the wave-emitting source to be positioned closer to the material without direct exposure to other sources' waves. This enables tighter spacing while maintaining magnetron safety through the waveguide's directional control and isolation properties.
3Device complexity
If electromagnetic waves are emitted directly into empty space inside the chamber, then the device simplicity is maintained, but the wave reflection and dispersion are insufficient for homogeneous heating
Solution Approach 1:
A waveguide system is introduced as an intermediary between the wave-emitting sources and the material. The waveguide provides controlled wave reflection and dispersion, ensuring homogeneous heating distribution. This adds moderate complexity while significantly improving heating uniformity and process control.
Solution Approach 2:
The waveguide system creates localized zones of enhanced wave dispersion and reflection in specific regions of the chamber. This allows different areas of the material to receive optimized wave exposure, improving overall heating uniformity while keeping the overall device design relatively simple.
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 achieves efficient and homogeneous heating of materials, reducing the need for fossil fuel-based heat generation and lowering energy consumption, making the process more economically viable and environmentally friendly.
Implementation Method 1
the use of microwave radiation systems to reduce the moisture of mining products
Implementation Method 2
at least one wall of the main cavity comprising at least one portion bent at an acute angle formed against a vertical reference centerline of the main cavity
Implementation Method 3
a permanent magnet element arranged in at least one wall of the main cavity, for changing the course of at least part of the electromagnetic waves emitted by the source
Data Source
AI summary
The present invention relates to a device for heating materials using microwaves, particularly applicable to the heating of ore products, which makes it possible to eliminate the use of fossil fuels (for example natural gas, coal, fuel oil, etc.) for generating heat for heating this type of material, rendering viable the use of microwaves for heating materials through a more efficient dispersion of the electromagnetic waves thereof. The present invention also relates to systems that make use of the heating device as set out above, and a method for heating using microwaves.