Rotatable Gas-Permeable Shaft for Micro-Bubble Generation
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Solution Overview
Problem
Existing methods for generating gas bubbles in liquids, such as dissolved air flotation (DAF), are energy-intensive and inefficient at high temperatures and salinity levels, and complex devices like gassing discs with hollow shafts require complex constructions and high energy for efficient bubble production.
Innovation Solution
A device with a rotatable gas-permeable hollow shaft and alternately arranged gassing discs and spacers, where the spacers have chambers that allow even gas distribution to the discs, enabling low-energy, large-scale production of micro-bubbles suitable for water purification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If DAF process with saturation column is used to generate micro-bubbles, then bubble generation efficiency is improved, but energy consumption increases significantly
Solution Approach 1:
The invention extracts and eliminates the saturation column and recycling stream from the traditional DAF process, using only direct gas injection through a simplified gassing membrane to generate micro-bubbles, thereby removing the energy-intensive components while maintaining bubble generation effectiveness
Solution Approach 2:
The invention uses a gassing membrane as a simplified alternative copy of the complex saturation column system, achieving the same micro-bubble generation function through direct gas permeation without requiring high-pressure saturation and recycling infrastructure
2Manufacturing precision
If gassing discs with inner and outer hollow shafts are used, then even bubble production is achieved, but device complexity increases
Solution Approach 1:
The invention removes the complex inner and outer hollow shaft structure, retaining only a single hollow shaft that receives compressed gas directly and distributes it through spacers to gassing membranes, achieving the same uniform bubble production with significantly reduced structural complexity
Solution Approach 2:
Instead of using a complex dual-shaft system to achieve symmetric gas distribution, the invention inverts the approach by using a single shaft with externally attached spacers and gassing membranes, achieving uniform distribution through a simpler radial configuration
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 device produces micro-bubbles efficiently and cost-effectively, reducing energy consumption and enabling effective separation of hydrophobic particles, making it suitable for industrial-scale water purification applications.
Implementation Method 1
the at least two chambers (K1, K2) are arranged on the spacer in such a way that the chambers (K1, K2) are in open communication with the centered opening (O)... the radii of the centered opening (O) and the radii of the at least two chambers (K1, K2) overlap or overlap, so that the centered opening (O) and the at least two chambers (K1, K2) are in open communication with one another at least in the overlap area
Implementation Method 2
Gas bubbles, for example from air, are generated and introduced into the liquid phase... the formation of micro-bubbles with diameters of 10 to 100 μm in the form of a swarm of bubbles
Implementation Method 3
Hydrophobic particles in the liquid phase, such as organic substances or biological waste products, attach themselves to these also hydrophobic bubbles and rise to the surface due to the buoyancy caused by the gas bubbles
Data Source
AI summary
A device for generating gas bubbles in a liquid in a container includes a rotatable gas-permeable hollow shaft arranged in a container, gassing discs arranged on the hollow shaft and spacers arranged between the gassing discs, gassing discs and spacers being arranged alternately on the hollow shaft in gas-tight contact with one another, a feed line for a compressed gas into the interior of the shaft, spacer having a centered opening (O) for receiving the shaft and at least two chambers, the chambers being equally spaced around the centered opening, where the centered opening and the chambers at least partially overlap, where the centered opening and the chambers are in communication with one another at least in the overlap region, so that the compressed gas can flow from the shaft into in each case a chamber of the spacer and enter the gassing discs from the chamber of the spacer.