Rotary Gas Bubble Ejector Low-Pressure Zone Micro-Bubble Generation
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Solution Overview
Problem
Current aeration devices are energy-intensive and have high life cycle costs due to their inefficiency in transferring oxygen into liquid bodies, such as wastewater, which limits their operational and maintenance costs.
Innovation Solution
The rotary gas bubble ejector employs a fluid reservoir chamber with a rotor plate and shaft that generates a low-pressure zone upon rotation, producing micro-sized gas bubbles by accelerating gas flow through a fluid acceleration gap, enhancing oxygen transfer efficiency with customizable rotor plate designs for various applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional aeration devices (subsurface low-pressure aeration or mechanical aeration) are used, then oxygen transfer into liquid is achieved, but energy consumption is high and aeration efficiency is low
Solution Approach 1:
The invention employs a rotary gas bubble ejector that utilizes fluid dynamics and pressure differentials created by rotor rotation to generate and eject gas bubbles. The system uses a fluid reservoir chamber, rotor plate with fluid acceleration gap, and centrifugal forces to propel gas-liquid mixture upward, replacing energy-intensive mechanical agitation or compressed air systems with a more efficient fluid dynamic approach.
Solution Approach 2:
The invention changes the physical parameters of gas bubble generation by creating micro-bubbles through the fluid acceleration gap between the rotor plate and fluid reservoir chamber bottom. This parameter change (from macro to micro bubble scale) significantly increases the surface area for oxygen transfer, improving aeration efficiency while reducing energy consumption per unit of oxygen transferred.
2Productivity
If large gas bubbles (1-2 mm) are produced by conventional aeration processes, then aeration is achieved, but energy efficiency is poor and life cycle costs are high
Solution Approach 1:
The invention fundamentally changes the bubble size parameter from conventional 1-2 mm bubbles to micro-bubbles generated through the fluid acceleration gap. This parameter change increases the total surface area for gas-liquid contact, dramatically improving oxygen transfer efficiency and reducing energy waste per unit of oxygen transferred.
Solution Approach 2:
The invention introduces a new dimensional approach to bubble generation by using the radial fluid acceleration gap between the rotating rotor plate and chamber bottom. This creates a three-dimensional fluid dynamic field that conventional two-dimensional aeration devices cannot achieve, enabling micro-bubble formation through centrifugal and pressure gradient effects.
3Ease of operation
If high velocity liquid flow is used to create low-pressure zone in self-aspirating aerators, then atmospheric air is drawn into liquid, but energy consumption increases
Solution Approach 1:
The invention uses pneumatic-hydraulic principles by creating a rotating fluid field that naturally draws in atmospheric air through the fluid acceleration gap. The rotating rotor plate creates pressure differentials that aspirate air into the liquid stream without requiring separate air intake mechanisms or high-velocity liquid jets, reducing energy consumption while maintaining self-aspirating capability.
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
This solution reduces energy consumption and increases oxygen transfer rates, improving aeration efficiency while minimizing particulate disturbance and operational costs, particularly in applications like wastewater treatment and aquaculture.
Implementation Method 1
Rotation of the shaft initiates a fluid flow with the at least one rotor plate, thereby producing a low-pressure zone within the fluid acceleration gap
Implementation Method 2
A fluid acceleration gap is positioned between the bottom end of the fluid reservoir chamber and the upper surface of the at least one rotor plate
Data Source
AI summary
A rotary gas bubble ejector has a fluid reservoir chamber having at a bottom end a fluid discharge opening and a shaft extending through fluid reservoir chamber in connection with a rotor plate. The rotor plate has an outer dimension greater than the outer dimension of fluid discharge opening and is positioned proximate bottom end of fluid reservoir chamber such that a fluid acceleration gap is formed. Rotation of the shaft and rotor plate initiates a fluid flow thereby generating a low-pressure zone within the fluid acceleration gap, wherein gas is discharged from the fluid reservoir chamber into the fluid acceleration gap. As the gas is expelled from the fluid acceleration gap, fluids, gas and liquid, are brought into contact producing micro-sized gas bubbles that are ejected into the body of liquid.