Gas-Liquid Mixing via Segmented Flow Channels
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Solution Overview
Problem
Existing methods for introducing gas into a liquid face challenges such as bubble coalescence, increased resistance to flow, and energy losses due to flow separation, particularly in large volume gas injection and flow accelerating constrictions, which hinder efficient mixing and mass transfer.
Innovation Solution
The solution involves segmenting the flow into discrete channels perpendicular to the overall fluid flow direction, using a fluid directing formation with vanes and orifices arranged to introduce gas into isolated portions of the flow, reducing coalescence and enhancing mixing through rotational components and aerodynamic designs, while maintaining low energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gas is introduced into liquid through dispersed air systems, then oxygen transfer efficiency is improved, but energy consumption increases
Solution Approach 1:
The invention divides the gas introduction system into multiple discrete channels or injection points distributed throughout the liquid flow path. This segmentation allows gas to be introduced at multiple locations simultaneously, increasing the total interfacial area for mass transfer without requiring excessive energy input at any single point, thus resolving the contradiction between oxygen transfer efficiency and energy consumption.
2Productivity
If large quantities of gas are introduced into liquid, then oxygen transfer rate is improved, but bubble coalescence increases
Solution Approach 1:
By dividing the gas introduction into multiple discrete channels distributed throughout the liquid flow, the system can handle large total gas quantities while maintaining small bubble sizes. Each channel introduces gas locally, preventing the accumulation and coalescence that would occur with a single large injection point, thus maintaining both high oxygen transfer rate and uniform bubble distribution.
Solution Approach 2:
The invention creates different local conditions at different injection points along the liquid flow path. Each channel is optimized for local gas introduction, creating regions of high gas-liquid interfacial area distributed throughout the system. This local optimization allows large total gas quantities to be processed while maintaining stable bubble characteristics through localized control.
3Productivity
If gas is introduced at flow accelerating constriction, then mixing efficiency is improved, but flow separation and energy losses increase
Solution Approach 1:
Instead of introducing gas at a single flow accelerating constriction point, the invention distributes multiple gas introduction channels along the liquid flow path. This segmentation allows mixing to occur progressively at multiple locations rather than all at one high-energy loss point, maintaining mixing efficiency while reducing cumulative energy losses from flow separation.
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 approach effectively distributes gas within the liquid, reducing bubble coalescence and energy losses, improving oxygen transfer efficiency and mass transfer rates while minimizing energy consumption.
Implementation Method 1
segmenting the flow into discrete channels perpendicular to the overall fluid flow direction
Implementation Method 2
orifices arranged to introduce gas into isolated portions of the flow
Implementation Method 3
enhancing mixing through rotational components and aerodynamic designs
Implementation Method 4
reducing coalescence and enhancing mixing through rotational components and aerodynamic designs, while maintaining low energy consumption
Data Source
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AI summary
An apparatus and method for introducing gas into a liquid is disclosed. The apparatus comprises: a conduit (20); a fluid directing formation (10) arranged within said conduit and defining a plurality of discrete channels within said conduit, said channels being isolated from each other in a direction perpendicular to a direction of fluid flow through said channels, each channel providing a flow accelerating constriction to said fluid flow such that fluid flowing in each of said channels is caused to accelerate as it flows through said flow accelerating constrictions; wherein at least some of said channels comprise orifices within said flow accelerating constrictions, said orifices being in fluid communication with a gas source, such that said gas is drawn through said orifices to be entrained in said fluid flow by virtue of a reduced pressure in said channels caused by said fluid flow.