Microbubble Generator Angled Air Hole Segmentation
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Solution Overview
Problem
Existing microbubble generators produce bubbles of several millimeters to tens of millimeters in size, resulting in a small contact area and short residence time in liquid, leading to low gas-liquid mass-transfer efficiency, and are inefficient in terms of energy consumption and gas volume.
Innovation Solution
A microbubble generator with a gas-liquid mixing chamber featuring air holes with an angled structure that points towards the liquid flow direction, combined with a gas gathering chamber and a zigzag incision on the bubble flow outlet to disperse larger bubbles, reducing energy consumption and enhancing gas-liquid mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If existing microbubble diffusers are used, then bubble generation is achieved, but bubble sizes are large (several millimeters to tens of millimeters) resulting in small contact area and short residence time
Solution Approach 1:
The air hole is divided into multiple segments along its length, with each segment having a different diameter. The air hole includes a first section with a first diameter and a second section with a second diameter, where the diameters differ. This segmentation allows the air hole to generate bubbles of controlled, smaller sizes by distributing gas flow through multiple diameter zones, thereby increasing contact area and residence time in the liquid.
Solution Approach 2:
Different sections of the air hole are given different local properties (diameters) to achieve specific functional requirements. The first section has a first diameter optimized for certain bubble generation characteristics, while the second section has a second diameter optimized for other characteristics, allowing localized control over bubble size and distribution to improve overall mass-transfer efficiency.
2Productivity
If existing devices generate micron level bubbles, then gas-liquid mass-transfer efficiency improves, but energy consumption increases and gas blowing volume decreases
Solution Approach 1:
The invention changes the geometric parameters of the air hole (having multiple sections with different diameters) to optimize bubble generation. By carefully selecting the diameters of the first and second sections, the device achieves micron level bubble sizes that improve mass-transfer efficiency while maintaining lower energy consumption and higher gas blowing volume compared to existing micron bubble generation devices.
3Productivity
If air holes with angle structure are used, then bubble size is reduced and mass-transfer efficiency improves, but device structure becomes more complex
Solution Approach 1:
The air hole is segmented into multiple sections with different diameters, which can be manufactured as a single integrated component. This segmentation approach achieves complex bubble generation functionality while keeping the overall structure relatively simple and manufacturable, avoiding the need for multiple separate components or complex assemblies.
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 generates extremely small bubbles that stay in the liquid longer, significantly improving gas-liquid mass-transfer efficiency while reducing energy consumption and increasing gas volume, achieving a desirable mixing effect.
Implementation Method 1
a gas passing through the air hole is cut into microbubbles at the pointed end of the angle structure of the air hole. Because an equivalent diameter of a gas channel at the pointed end of the angle structure tends to be infinitely small along the liquid flow direction, the generated bubbles have extremely small diameters
Implementation Method 2
A nozzle edge of the bubble flow outlet is provided with a zigzag incision, so that large bubbles gathered by microbubbles in flow may be dispersed again, to ensure a gas-liquid mixing effect
Data Source
AI summary
A microbubble generation device comprises a liquid inlet (101), a gas inlet (104), a bubble flow outlet (103), and a gas-liquid mixing chamber (102). An air-permeable hole having an angle structure is provided at a gas-liquid interface of the gas-liquid mixing chamber (102), and a pointed end of the angle structure of the air-permeable hole points to a liquid flow direction. The bubbles generated by the device are extremely small in diameter, prolonging a duration the bubbles stay in the liquid phase, and enhancing gas-liquid mass transfer efficiency.