Microwave Processing Equipment Angled Waveguides Uniform Heating
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Solution Overview
Problem
Current microwave heating technologies face challenges in efficiently and uniformly heating continuous flow liquids due to mismatched microwave absorption with flow characteristics, poor stability of microwave modes, low energy utilization, and reflection issues, which hinder effective temperature maintenance and safety in continuous flow applications.
Innovation Solution
A microwave processing equipment for continuous flow liquids is designed with a feed preheating section, a microwave heating section, and a cooling section, featuring a rectangular microwave absorption cavity, angled waveguides, tuners to minimize reflection, and a material carrying pipeline, ensuring uniform energy distribution and efficient heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional steam heating is used for continuous flow liquids, then heating can be achieved, but energy consumption is high and thermal efficiency is low
Solution Approach 1:
The patent replaces traditional steam heating (mechanical/thermal system) with microwave heating (electromagnetic field system). The microwave heating section uses electromagnetic waves to directly heat the liquid, eliminating the need for steam generation and heat transfer intermediaries, thereby reducing energy consumption and improving thermal efficiency.
Solution Approach 2:
The patent changes the heating method from conventional thermal conduction to microwave dielectric heating. By adjusting microwave power parameters and flow rate parameters, the system achieves efficient heating with lower energy consumption. The microwave frequency and power density are optimized to match the dielectric properties of the liquid being heated.
2Speed
If microwave heating is applied to continuous flow liquids, then heating speed increases, but uniformity of heating is poor
Solution Approach 1:
The patent divides the microwave heating section into multiple independent waveguide channels, each containing a magnetron. This segmentation allows different regions of the liquid flow to receive microwave energy simultaneously and uniformly. The heating section is divided into first and second heating sections with separate waveguide systems, ensuring uniform temperature distribution throughout the continuous flow.
Solution Approach 2:
The patent introduces a spatial dimension to microwave heating by using multiple waveguides arranged in different orientations (first waveguide system and second waveguide system). This multi-dimensional approach ensures that microwave energy is distributed uniformly throughout the liquid flow cross-section, eliminating cold spots and achieving homogeneous heating.
3Ease of operation
If waveguides are connected to resonant cavity, then microwave transmission is enabled, but electromagnetic wave reflection occurs causing safety issues
Solution Approach 1:
The patent converts the potentially harmful electromagnetic wave reflection into a beneficial effect by using the reflected waves to reinforce the standing wave pattern inside the resonant cavity. The waveguides are designed with specific impedance matching to control reflection, and the reflected waves are utilized to enhance the heating effect rather than causing damage.
Solution Approach 2:
The patent introduces an intermediary matching network between the waveguide and resonant cavity to minimize electromagnetic wave reflection. This matching network acts as a buffer that impedes wave reflection back to the magnetron, ensuring safe operation while maintaining efficient microwave transmission for heating.
4Adaptability or versatility
If resonant cavity shape is varied, then microwave mode diversity is achieved, but stability of microwave field is poor
Solution Approach 1:
The patent applies different resonant cavity shapes to different heating sections based on local requirements. The first resonant cavity and second resonant cavity are designed with different geometries to match the specific heating needs of different liquid flow regions. Each cavity is optimized for its local function while maintaining overall system stability through coordinated control of microwave parameters.
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 equipment improves safety and efficiency by achieving uniform heating, reducing energy consumption, and maintaining required temperatures effectively, addressing the limitations of traditional steam heating methods.
Implementation Method 1
microwave heating technology is regarded as one of the most promising industrial heating technologies among novel physical field processing technology
Implementation Method 2
Microwaves refer to electromagnetic waves in a frequency range of 300 MHz-300 GHz
Data Source
AI summary
The disclosure discloses a microwave processing equipment for continuous flow liquids, and belongs to the technical field of microwave processing. The microwave processing equipment includes a feed preheating section, a microwave heating section and a cooling section. The microwave heating section includes a microwave generation system, a waveguide system, tuners, and a microwave absorption cavity. The waveguide system includes at least two waveguides. Each waveguide is installed at the microwave feed port formed in the outer wall of the microwave absorption cavity according to a predetermined angle greater than or equal to 15° and less than 90°.