VOC Refining via Two-Fluid Nozzle Atomization
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Solution Overview
Problem
Existing VOC refining apparatuses using air flow vacuum evaporating methods have low evaporation rates and refining processing capacities due to large particle diameters of VOC-containing liquids and moisture contamination from air introduction.
Innovation Solution
A VOC refining apparatus employing a two-fluid nozzle spraying device that atomizes VOC-containing liquids with compressed air, reducing particle diameter and enhancing evaporation efficiency by separating moisture effectively from the vacuum container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a single-fluid nozzle is used to spray VOC-containing liquid, then the liquid is sprayed into the vacuum container, but the particle diameter remains large resulting in low evaporation rate
Solution Approach 1:
The patent applies pneumatic principles by using compressed air (gas phase) to atomize the VOC-containing liquid (liquid phase) in a two-fluid nozzle. The gas flow breaks up the liquid into fine droplets through aerodynamic forces, creating a mist that sprays into the vacuum container. This gas-liquid interaction dramatically reduces particle diameter compared to single-fluid nozzle spray, thereby increasing the evaporation rate and refining processing capacity of the VOC separation process.
2Productivity
If air is introduced to promote evaporation, then evaporation efficiency improves, but moisture contaminates the vacuum container
Solution Approach 1:
The patent uses compressed air in an inert atmosphere sense - the gas phase from the two-fluid nozzle creates a controlled environment that promotes evaporation without introducing harmful moisture. The compressed air is introduced in a way that facilitates VOC evaporation from the liquid droplets while the vacuum system simultaneously removes evaporated moisture, preventing contamination. This approach enables efficient evaporation promotion while maintaining the vacuum environment integrity.
3Device complexity
If the liquid is stored without spraying, then the system is simple, but the surface area is small resulting in low evaporation efficiency
Solution Approach 1:
The patent applies segmentation by breaking up the bulk liquid into numerous small droplets through the two-fluid nozzle atomization process. Instead of having a large continuous liquid body with limited surface area, the liquid is segmented into countless fine droplets dispersed in the vacuum container. This dramatically increases the total surface area available for evaporation, thereby significantly improving evaporation efficiency while maintaining operational simplicity.
4Speed
If the particle diameter of VOC-containing liquid is large, then the spraying device is simple, but the evaporation rate is low
Solution Approach 1:
The patent employs pneumatic-hydraulic interaction in the two-fluid nozzle where compressed air (gas) and VOC-containing liquid (liquid) are introduced separately and mix in a gas-liquid mixing section. The high-velocity gas stream atomizes the liquid, breaking it into fine droplets with small particle diameter. This pneumatic-liquid interaction mechanism achieves fine atomization and high evaporation rate without requiring mechanically complex moving parts, thus maintaining relative simplicity in the spraying device structure.
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 apparatus significantly improves VOC evaporation and separation rates, increasing refining processing efficiency and reducing costs by efficiently removing moisture while maintaining reduced pressure in the vacuum container.
Implementation Method 1
a vacuum pump that is connected to the vacuum container and depressurizes an inside of the vacuum container to vacuum-evaporate moisture included in the VOC-containing liquid
Implementation Method 2
a gas-liquid mixing section that is disposed between the inner lid and the outer lid, is formed at a space of a disc-shaped profile between the inner end portion of the inner lid and the outer end portion of the outer lid, and mixes a gas flow flowing through the gas passageway and a liquid flow flowing through the liquid passageway
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A particle diameter is decreased and a surface area per unit flow amount is increased by spraying a VOC-containing liquid from a spraying device spraying that is a two-fluid nozzle in a vacuum container, so that only water in the VOC-containing liquid can be greatly evaporated and exhausted, and a concentrated VOC-containing liquid having high concentration can be refined and processed.