Rotating Bladed Wheel Micro Gas Bubble Generation
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Solution Overview
Problem
Existing methods fail to generate a large amount of micro gas bubbles with diameters less than 15 μm, specifically less than 10 μm, which limits their application in fields such as gas hydrate formation and gas dissolution efficiency.
Innovation Solution
A gas bubble generation apparatus featuring a rotating bladed wheel with blades parallel to the axis of rotation, operating at a peripheral speed of 5.8 m/sec or higher, and optimized ventilation resistance to generate micro gas bubbles with diameters less than 15 μm, achieving a density of 40 bubbles/mL or more.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If gas bubbles with diameters of 10-50 μm are generated to slow down rising speeds, then gas dissolution efficiency is improved, but the ability to generate micro gas bubbles with diameters less than 15 μm is insufficient
Solution Approach 1:
The gas bubble generation process is segmented into multiple stages: primary bubble formation, bubble subdivision by rotating bladed wheel, and bubble size selection through controlled ventilation resistance. This segmentation enables precise control over bubble diameter distribution, producing micro gas bubbles with diameters less than 15 μm while maintaining high dissolution efficiency.
Solution Approach 2:
The invention changes critical parameters including rotating bladed wheel speed (peripheral speed of 5.8 m/sec or higher), ventilation resistance (equal to or larger than a ventilation port with inner diameter of 0.36 times the average blade width and length of 3 mm), and blade orientation (faces substantially parallel to the axis of rotation). These parameter changes enable generation of micro gas bubbles with diameters less than 15 μm, achieving both high dissolution efficiency and precise bubble size control.
2Productivity
If high rotational speed (12 m/sec peripheral speed) is used to generate fine gas bubbles, then gas bubble subdivision is improved, but dimensional accuracy requirements and device complexity increase
Solution Approach 1:
The invention optimizes the peripheral speed parameter to 5.8 m/sec or higher, which is lower than the conventional 12 m/sec requirement. This parameter change reduces the dimensional accuracy requirements for manufacturing components while still achieving effective gas bubble subdivision and micro gas bubble generation, thereby reducing device complexity.
Solution Approach 2:
Instead of increasing rotational speed to achieve bubble subdivision, the invention inverts the approach by using a rotating bladed wheel with blades oriented parallel to the axis of rotation, combined with controlled ventilation resistance. This inverted approach achieves bubble subdivision at lower speeds, reducing the need for high-dimensional-accuracy components.
3Quantity of substance
If ventilation resistance is reduced to increase gas flow, then gas supply is improved, but micro gas bubble density decreases
Solution Approach 1:
The invention sets ventilation resistance to equal to or larger than a ventilation port with inner diameter of 0.36 times the average blade width and length of 3 mm. This specific parameter setting creates optimal conditions for micro gas bubble formation, achieving a density of 40 bubbles/mL or more while maintaining adequate gas supply through the controlled resistance.
Solution Approach 2:
The invention uses the ventilation port design as a reference model (copy) to determine the optimal ventilation resistance. By copying the dimensions of a standard ventilation port (inner diameter of 0.36 times blade width, length of 3 mm), the system achieves reliable micro gas bubble density without requiring complex control mechanisms.
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 effectively produces a high density of micro gas bubbles, enhancing gas dissolution and enabling applications in gas hydrate formation and other industrial processes.
Implementation Method 1
gas is sucked along the rotating shaft by the sucking action due to vortex flows of the liquid
Implementation Method 2
The operation of agitating and mixing the liquid and the gas is achieved with a vigorous cutting operation applied to a mixture of the liquid and the gas by individual blade pieces of the agitation bladed wheel
Implementation Method 3
a mingling operation provided by collision between flow motions in the forward direction given by the forward blade and flow motions in the reverse direction given by the reverse blade
Implementation Method 4
rising speeds of the gas bubbles due to buoyancy are greatly slowed down
Data Source
AI summary
A method and an apparatus for generating gas bubbles, which can generate a large amount of micro gas bubbles having diameters of less than 15 μm, specifically less than 10 μm, in a liquid. The apparatus comprises a tube 2 having a closed end 14 at one end and an open end 15 at the other end, and a rotating bladed wheel 3 installed in the tube 2 and rotating coaxially or substantially coaxially with the tube 2. The rotating bladed wheel 3 has one or more blades 4. The face of each blade 4 is substantially parallel to the axis of a rotating shaft 5 of the rotating bladed wheel 3. Ventilation resistance between the interior of the tube 2 on the side near the closed end 14 and the outside gas is equal to or larger than that of a ventilation port 7 having an inner diameter of 0.36 time an average width d of the blades and a length of 3 mm. At least the open end 15 of the tube 2 and the rotating bladed wheel 3 are immersed in a liquid 20 and the rotating bladed wheel 3 is rotated at a peripheral speed of 5.8 m/sec or higher.